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なぜマルウェア解析は自動化できないのか
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Yuma Kurogome
August 14, 2016
Programming
4.4k
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なぜマルウェア解析は自動化できないのか
セキュリティ・キャンプ全国大会2016 講義資料
Yuma Kurogome
August 14, 2016
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typedef struct _IMAGE_OPTIONAL_HEADER { WORD Magic; ... DWORD SizeOfCode; //
コード全体のサイズ ... DWORD AddressOfEntryPoint; // エントリポイントのアドレス (RVA) DWORD BaseOfCode; // コード領域のベースアドレス (RVA) DWORD BaseOfData; // グローバル変数などの値が確定していないデータ領域のベースアドレス (RVA) DWORD ImageBase; // 仮想メモリにロードされるときの開始(ベース)アドレス // RVAはImageBaseのアドレスを引いた相対アドレス ... DWORD SizeOfImage; // メモリにロードされたときの全体サイズ DWORD SizeOfHeaders; ... IMAGE_DATA_DIRECTORY DataDirectory[IMAGE_NUMBEROF_DIRECTORY_ENTRIES]; // インポート情報やエクスポート情報などへのアドレス (RVA) } IMAGE_OPTIONAL_HEADER, *PIMAGE_OPTIONAL_HEADER;
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• MOV EBX, EAX ADD EAX, $0x4 … MOV EBX,
EAX ADD EAX, $0x4 … • • • mov_i32 ebx, eax movi_i32 tmp1, 0x4 add_i32 eax, tmp1 •
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from datetime import date from hashlib import sha256 def dyre_dga(num,
date_str=None): if None == date_str: date_str = '{0.year}-{0.month}-{0.day}'.format(date.today()) tlds = ['.cc', '.ws', '.to', '.in', '.hk', '.cn', '.tk', '.so'] hash = sha256('{0}{1}'.format(date_str, num)).hexdigest()[3:36] replace_char = chr(0xFF & ((num % 26) + 97)) return '{0}{1}{2}:443'.format(replace_char, hash, tlds[num % len(tlds)]) todays_domains = [dyre_dga(i) for i in xrange(333)]
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cmp eax, 0x7E0 je 0xdeadbaad if(x!=2016) Invalid. ASSERT( INPUT_*_*_* =0hex7E0
); (a1 or !a2 or a3 … or an) and (b1 or b2 or !b3 … or !bn) and …
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