Actor(s): Unit 8200
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rule win_duqu_auto { meta: author = "Felix Bilstein - yara-signator at cocacoding dot com" date = "2023-07-11" version = "1" description = "Detects win.duqu." info = "autogenerated rule brought to you by yara-signator" tool = "yara-signator v0.6.0" signator_config = "callsandjumps;datarefs;binvalue" malpedia_reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.duqu" malpedia_rule_date = "20230705" malpedia_hash = "42d0574f4405bd7d2b154d321d345acb18834a41" malpedia_version = "20230715" malpedia_license = "CC BY-SA 4.0" malpedia_sharing = "TLP:WHITE" /* DISCLAIMER * The strings used in this rule have been automatically selected from the * disassembly of memory dumps and unpacked files, using YARA-Signator. * The code and documentation is published here: * https://github.com/fxb-cocacoding/yara-signator * As Malpedia is used as data source, please note that for a given * number of families, only single samples are documented. * This likely impacts the degree of generalization these rules will offer. * Take the described generation method also into consideration when you * apply the rules in your use cases and assign them confidence levels. */ strings: $sequence_0 = { 894634 8bcf e8???????? 894638 } // n = 4, score = 400 // 894634 | mov dword ptr [esi + 0x34], eax // 8bcf | mov ecx, edi // e8???????? | // 894638 | mov dword ptr [esi + 0x38], eax $sequence_1 = { 8bd8 4a 8a06 84c0 75da 895c2424 } // n = 6, score = 400 // 8bd8 | mov ebx, eax // 4a | dec edx // 8a06 | mov al, byte ptr [esi] // 84c0 | test al, al // 75da | jne 0xffffffdc // 895c2424 | mov dword ptr [esp + 0x24], ebx $sequence_2 = { 8bcf e8???????? ba2760f046 89463c 8bcf } // n = 5, score = 400 // 8bcf | mov ecx, edi // e8???????? | // ba2760f046 | mov edx, 0x46f06027 // 89463c | mov dword ptr [esi + 0x3c], eax // 8bcf | mov ecx, edi $sequence_3 = { 03c2 3bf8 0f8320010000 8a07 } // n = 4, score = 400 // 03c2 | add eax, edx // 3bf8 | cmp edi, eax // 0f8320010000 | jae 0x126 // 8a07 | mov al, byte ptr [edi] $sequence_4 = { e8???????? ba6863ff1e 898690000000 8bcf e8???????? ba36442dba } // n = 6, score = 400 // e8???????? | // ba6863ff1e | mov edx, 0x1eff6368 // 898690000000 | mov dword ptr [esi + 0x90], eax // 8bcf | mov ecx, edi // e8???????? | // ba36442dba | mov edx, 0xba2d4436 $sequence_5 = { 3dfb0a5ecd 0f85c5000000 3bd6 0f84bd000000 8b4224 8b7a20 } // n = 6, score = 400 // 3dfb0a5ecd | cmp eax, 0xcd5e0afb // 0f85c5000000 | jne 0xcb // 3bd6 | cmp edx, esi // 0f84bd000000 | je 0xc3 // 8b4224 | mov eax, dword ptr [edx + 0x24] // 8b7a20 | mov edi, dword ptr [edx + 0x20] $sequence_6 = { 56 51 8bf2 e8???????? } // n = 4, score = 400 // 56 | push esi // 51 | push ecx // 8bf2 | mov esi, edx // e8???????? | $sequence_7 = { 7e34 0fb60a 8d41bf 6683f819 } // n = 4, score = 400 // 7e34 | jle 0x36 // 0fb60a | movzx ecx, byte ptr [edx] // 8d41bf | lea eax, [ecx - 0x41] // 6683f819 | cmp ax, 0x19 $sequence_8 = { 85c0 7465 e8???????? 85c0 } // n = 4, score = 400 // 85c0 | test eax, eax // 7465 | je 0x67 // e8???????? | // 85c0 | test eax, eax $sequence_9 = { 0fafd8 8b442420 33d9 8b4c2414 } // n = 4, score = 400 // 0fafd8 | imul ebx, eax // 8b442420 | mov eax, dword ptr [esp + 0x20] // 33d9 | xor ebx, ecx // 8b4c2414 | mov ecx, dword ptr [esp + 0x14] $sequence_10 = { 8bf2 57 8bf9 85f6 7425 } // n = 5, score = 200 // 8bf2 | mov esi, edx // 57 | push edi // 8bf9 | mov edi, ecx // 85f6 | test esi, esi // 7425 | je 0x27 $sequence_11 = { 8bf2 3bce 8975fc 894df8 } // n = 4, score = 200 // 8bf2 | mov esi, edx // 3bce | cmp ecx, esi // 8975fc | mov dword ptr [ebp - 4], esi // 894df8 | mov dword ptr [ebp - 8], ecx $sequence_12 = { 8bf1 ff15???????? 8b06 8b7604 } // n = 4, score = 200 // 8bf1 | mov esi, ecx // ff15???????? | // 8b06 | mov eax, dword ptr [esi] // 8b7604 | mov esi, dword ptr [esi + 4] $sequence_13 = { 8bf1 e8???????? 8bce 8bf8 e8???????? ff4608 } // n = 6, score = 200 // 8bf1 | mov esi, ecx // e8???????? | // 8bce | mov ecx, esi // 8bf8 | mov edi, eax // e8???????? | // ff4608 | inc dword ptr [esi + 8] $sequence_14 = { 8bf1 e8???????? 8b75fc 8d0cdda0ea6110 8b5104 } // n = 5, score = 200 // 8bf1 | mov esi, ecx // e8???????? | // 8b75fc | mov esi, dword ptr [ebp - 4] // 8d0cdda0ea6110 | lea ecx, [ebx*8 + 0x1061eaa0] // 8b5104 | mov edx, dword ptr [ecx + 4] $sequence_15 = { 8bf2 57 8d4e4c e8???????? } // n = 4, score = 200 // 8bf2 | mov esi, edx // 57 | push edi // 8d4e4c | lea ecx, [esi + 0x4c] // e8???????? | condition: 7 of them and filesize < 18759680 }
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