Actor(s): Lazarus Group
There is no description at this point.
rule win_bankshot_auto { meta: author = "Felix Bilstein - yara-signator at cocacoding dot com" date = "2026-05-04" version = "1" description = "Detects win.bankshot." 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.bankshot" malpedia_rule_date = "20260422" malpedia_hash = "a182e35da64e6d71cb55f125c4d4225196523f14" malpedia_version = "20260504" 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 = { 8bf8 8d5101 8a01 41 84c0 75f9 57 } // n = 7, score = 300 // 8bf8 | cmp edx, eax // 8d5101 | mov eax, dword ptr [eax + 0x48] // 8a01 | lock xadd dword ptr [eax], ebx // 41 | dec ebx // 84c0 | jne 0x1c // 75f9 | mov eax, dword ptr [ebp - 4] // 57 | cmp dword ptr [eax + 0x48], 0x1001e4b8 $sequence_1 = { 8bec 81ec48040000 a1???????? 33c5 8945f8 53 } // n = 6, score = 300 // 8bec | je 0xfd // 81ec48040000 | mov al, byte ptr [edi + 0x1001e1bc] // a1???????? | // 33c5 | or byte ptr [esi + edx + 0x19], al // 8945f8 | inc edx // 53 | movzx eax, byte ptr [ecx + 1] $sequence_2 = { ff15???????? 85c0 7417 8b85d4fbffff 85c0 } // n = 5, score = 200 // ff15???????? | // 85c0 | jne 0xffffffa9 // 7417 | lea eax, [ebp - 0x214] // 8b85d4fbffff | push eax // 85c0 | push eax $sequence_3 = { 8b4508 c700???????? 8b4508 898850030000 8b4508 59 c74048b8e40110 } // n = 7, score = 200 // 8b4508 | mov ax, word ptr [edx] // c700???????? | // 8b4508 | lea edx, [edx + 2] // 898850030000 | mov dword ptr [ebp - 0x1c], ecx // 8b4508 | cmp dword ptr [eax + 0x1001e1c0], ebx // 59 | je 0xf6 // c74048b8e40110 | inc ecx $sequence_4 = { 51 50 6a00 68e9fd0000 ffd6 8bd0 } // n = 6, score = 200 // 51 | test al, al // 50 | jne 0 // 6a00 | push edi // 68e9fd0000 | push dword ptr [ebp - 0xc548] // ffd6 | mov word ptr [ebp + eax*2 - 0x214], si // 8bd0 | sub edi, 1 $sequence_5 = { 59 c74048b8e40110 8b4508 6689486c 8b4508 66898872010000 } // n = 6, score = 200 // 59 | cmp byte ptr [eax], 0 // c74048b8e40110 | mov ecx, eax // 8b4508 | je 0x45 // 6689486c | mov al, byte ptr [ecx + 1] // 8b4508 | lea ecx, [esi + 0xc] // 66898872010000 | push 6 $sequence_6 = { ff15???????? 6689b445ecfdffff 83ef01 75a4 8d85ecfdffff 50 } // n = 6, score = 200 // ff15???????? | // 6689b445ecfdffff | cmp edx, 0x20 // 83ef01 | jb 0x51 // 75a4 | and eax, 0x8000001f // 8d85ecfdffff | jns 0xe // 50 | dec eax $sequence_7 = { 8b15???????? 8d85e43fffff 83c40c 89bdec3fffff } // n = 4, score = 200 // 8b15???????? | // 8d85e43fffff | sub esp, 0x448 // 83c40c | xor eax, ebp // 89bdec3fffff | mov dword ptr [ebp - 8], eax $sequence_8 = { e8???????? 83c404 89861c020000 8b45e0 8d4e0c 6a06 8d90c4e10110 } // n = 7, score = 200 // e8???????? | // 83c404 | lea ecx, [esi + 0xc] // 89861c020000 | push 6 // 8b45e0 | lea edx, [eax + 0x1001e1c4] // 8d4e0c | mov eax, dword ptr [ebp + 8] // 6a06 | mov dword ptr [eax + 0x350], ecx // 8d90c4e10110 | mov eax, dword ptr [ebp + 8] $sequence_9 = { 8b45fc 817848b8e40110 7409 ff7048 e8???????? 59 c70701000000 } // n = 7, score = 200 // 8b45fc | cmp edx, eax // 817848b8e40110 | jbe 0xfffffff2 // 7409 | jmp 0x19 // ff7048 | cmp edx, 0x100 // e8???????? | // 59 | jae 0x1b // c70701000000 | mov al, byte ptr [edi + 0x1001e1bc] $sequence_10 = { 83fa20 724f 251f000080 7905 48 83c8e0 } // n = 6, score = 200 // 83fa20 | push ebx // 724f | sub esp, 0x448 // 251f000080 | xor eax, ebp // 7905 | mov dword ptr [ebp - 8], eax // 48 | push ebx // 83c8e0 | push 3 $sequence_11 = { e9???????? 57 33ff 8bcf 8bc7 894de4 3998c0e10110 } // n = 7, score = 200 // e9???????? | // 57 | push dword ptr [eax + 0x48] // 33ff | pop ecx // 8bcf | lea ecx, [esi + 0xc] // 8bc7 | push 6 // 894de4 | lea edx, [eax + 0x1001e1c4] // 3998c0e10110 | pop edi $sequence_12 = { 7313 8a87bce10110 08441619 42 0fb64101 } // n = 5, score = 200 // 7313 | mov dword ptr [ebp - 0x20], eax // 8a87bce10110 | lea eax, [eax + 0x1001e1d0] // 08441619 | mov dword ptr [ebp - 0x1c], eax // 42 | imul eax, dword ptr [ebp - 0x1c], 0x30 // 0fb64101 | mov dword ptr [ebp - 0x20], eax $sequence_13 = { 50 6a00 6805000020 ff7308 ff15???????? } // n = 5, score = 200 // 50 | or eax, 0xffffffe0 // 6a00 | lea edx, [ecx + 1] // 6805000020 | mov al, byte ptr [ecx] // ff7308 | inc ecx // ff15???????? | $sequence_14 = { e8???????? 83c40c e8???????? 99 b907000000 f7f9 } // n = 6, score = 200 // e8???????? | // 83c40c | dec eax // e8???????? | // 99 | mov ecx, edi // b907000000 | cmp eax, -1 // f7f9 | je 0x134 $sequence_15 = { 57 50 e8???????? 83c40c 6b45e430 8945e0 8d80d0e10110 } // n = 7, score = 200 // 57 | je 0x45 // 50 | mov dword ptr [esi + 0x21c], eax // e8???????? | // 83c40c | mov eax, dword ptr [ebp - 0x20] // 6b45e430 | lea ecx, [esi + 0xc] // 8945e0 | push 6 // 8d80d0e10110 | lea edx, [eax + 0x1001e1c4] $sequence_16 = { 85db 7507 c746340c7b0110 57 ff7634 } // n = 5, score = 200 // 85db | mov ecx, edi // 7507 | mov eax, edi // c746340c7b0110 | mov dword ptr [ebp - 0x1c], ecx // 57 | cmp dword ptr [eax + 0x1001e1c0], ebx // ff7634 | imul eax, dword ptr [ebp - 0x1c], 0x30 $sequence_17 = { 894de5 894de9 894ded 66894df1 884df3 ff15???????? } // n = 6, score = 100 // 894de5 | mov ecx, 7 // 894de9 | add esp, 0xc // 894ded | cdq // 66894df1 | mov ecx, 7 // 884df3 | add esp, 0xc // ff15???????? | $sequence_18 = { c744242001000000 e8???????? 85c0 0f84ca010000 } // n = 4, score = 100 // c744242001000000 | repne scasb al, byte ptr es:[edi] // e8???????? | // 85c0 | dec eax // 0f84ca010000 | not ecx $sequence_19 = { 8b4d08 51 0fb7956cd4ffff 83c21a 52 8b4d0c } // n = 6, score = 100 // 8b4d08 | jge 0x43b // 51 | add ecx, dword ptr [ebp - 0x428] // 0fb7956cd4ffff | and ecx, 0x8000000f // 83c21a | jns 0x13 // 52 | movsx eax, byte ptr [edx] // 8b4d0c | cmp eax, 0x2e $sequence_20 = { 83c702 57 e8???????? 83c404 8bd8 53 } // n = 6, score = 100 // 83c702 | push eax // 57 | mov eax, dword ptr [esp + 0x24] // e8???????? | // 83c404 | push ecx // 8bd8 | push 1 // 53 | lea edx, [esp + 0x14] $sequence_21 = { 488bfb f2ae 48f7d1 4803f1 33d2 488bcb } // n = 6, score = 100 // 488bfb | dec esp // f2ae | mov ebp, ecx // 48f7d1 | mov edx, 0x403c // 4803f1 | mov ecx, 0x40 // 33d2 | dec eax // 488bcb | mov edi, ebx $sequence_22 = { 488bcf ff15???????? 83f8ff 0f842e010000 488d0d0f7f0000 } // n = 5, score = 100 // 488bcf | mov dword ptr [esp + 0x20], 1 // ff15???????? | // 83f8ff | test eax, eax // 0f842e010000 | je 0x1d0 // 488d0d0f7f0000 | test eax, eax $sequence_23 = { 8d83e60e0000 8bca 50 83e103 8d442448 68???????? } // n = 6, score = 100 // 8d83e60e0000 | push edi // 8bca | add esp, 4 // 50 | mov ebx, eax // 83e103 | push ebx // 8d442448 | mov edx, dword ptr [ecx*4 + 0x419040] // 68???????? | $sequence_24 = { ff15???????? 898588f8ffff c78574f8ffffffffffff c78560f8ffff00000000 c7858cf8ffff00000000 6802040000 } // n = 6, score = 100 // ff15???????? | // 898588f8ffff | cmp dword ptr [ebp - 0x678], 0 // c78574f8ffffffffffff | je 0xe // c78560f8ffff00000000 | mov dword ptr [ebp - 0x680], 0 // c7858cf8ffff00000000 | jmp 0x18 // 6802040000 | mov dword ptr [ebp - 0x680], 2 $sequence_25 = { 6a01 8d542414 6a04 89442418 } // n = 4, score = 100 // 6a01 | idiv ecx // 8d542414 | add esp, 0xc // 6a04 | cdq // 89442418 | mov ecx, 7 $sequence_26 = { 8910 81fae7030000 7708 81c2e8030000 8910 8b0b 6a00 } // n = 7, score = 100 // 8910 | je 0x204 // 81fae7030000 | push edi // 7708 | call esi // 81c2e8030000 | pop ebp // 8910 | ret 0xc // 8b0b | push dword ptr [ebp - 0x14] // 6a00 | push dword ptr [ebp - 0x28] $sequence_27 = { 4889842470010000 488bfa 4c8be9 ba3c400000 b940000000 } // n = 5, score = 100 // 4889842470010000 | mov dword ptr [esp + 0x20], ebx // 488bfa | dec eax // 4c8be9 | mov dword ptr [esp + 0x170], eax // ba3c400000 | dec eax // b940000000 | mov edi, edx $sequence_28 = { 81ff00010000 7ccd 8b8b200f0000 33c0 } // n = 4, score = 100 // 81ff00010000 | lea esi, [edi + 0x10] // 7ccd | mov dword ptr [eax], edx // 8b8b200f0000 | cmp edx, 0x3e7 // 33c0 | ja 0xa $sequence_29 = { 85c0 0f846e010000 8b542444 498bcc 2bf2 } // n = 5, score = 100 // 85c0 | dec eax // 0f846e010000 | add esi, ecx // 8b542444 | xor edx, edx // 498bcc | dec eax // 2bf2 | mov ecx, ebx $sequence_30 = { 0f848d010000 837f0400 0f8491000000 68???????? 8d7710 } // n = 5, score = 100 // 0f848d010000 | inc ecx // 837f0400 | test al, al // 0f8491000000 | jne 0 // 68???????? | // 8d7710 | push edi $sequence_31 = { 0fbe02 83f82e 743f 83bde8feffff1a } // n = 4, score = 100 // 0fbe02 | mov dword ptr [ebp - 0x17], ecx // 83f82e | mov dword ptr [ebp - 0x13], ecx // 743f | mov word ptr [ebp - 0xf], cx // 83bde8feffff1a | mov byte ptr [ebp - 0xd], cl $sequence_32 = { 83bd88f9ffff00 740c c78580f9ffff00000000 eb0a c78580f9ffff02000000 } // n = 5, score = 100 // 83bd88f9ffff00 | cdq // 740c | mov ecx, 7 // c78580f9ffff00000000 | idiv ecx // eb0a | lea ecx, [ebp - 0xc04] // c78580f9ffff02000000 | push ecx $sequence_33 = { 0f8d35040000 8b0d???????? 038dd8fbffff 81e10f000080 7905 } // n = 5, score = 100 // 0f8d35040000 | push 0 // 8b0d???????? | // 038dd8fbffff | mov dword ptr [ebp - 0xc14], eax // 81e10f000080 | cmp dword ptr [ebp - 0xc14], 0 // 7905 | mov dword ptr [ebp - 0x1b], ecx $sequence_34 = { 89442440 e8???????? 85c0 0f84b9010000 } // n = 4, score = 100 // 89442440 | je 0x176 // e8???????? | // 85c0 | mov edx, dword ptr [esp + 0x44] // 0f84b9010000 | dec ecx $sequence_35 = { 8b05???????? 488b4c2438 8947ff 895c2420 ff15???????? } // n = 5, score = 100 // 8b05???????? | // 488b4c2438 | dec eax // 8947ff | mov ecx, dword ptr [esp + 0x38] // 895c2420 | mov dword ptr [edi - 1], eax // ff15???????? | $sequence_36 = { 8b442434 8b4c2428 8b542424 50 8b442424 51 } // n = 6, score = 100 // 8b442434 | cdq // 8b4c2428 | mov ecx, 7 // 8b542424 | idiv ecx // 50 | add esp, 0xc // 8b442424 | cdq // 51 | mov ecx, 7 $sequence_37 = { 83c414 85c0 7503 83ceff } // n = 4, score = 100 // 83c414 | xor edx, eax // 85c0 | xor edx, eax // 7503 | xor eax, eax // 83ceff | pop ebp $sequence_38 = { 8d8dfcf3ffff 51 6a00 ff15???????? 8985ecf3ffff 83bdecf3ffff00 } // n = 6, score = 100 // 8d8dfcf3ffff | cdq // 51 | mov ecx, 7 // 6a00 | idiv ecx // ff15???????? | // 8985ecf3ffff | add esp, 0xc // 83bdecf3ffff00 | cdq $sequence_39 = { 8bf8 ff15???????? 81ff10030000 75d6 e8???????? 85c0 740a } // n = 7, score = 100 // 8bf8 | mov edi, eax // ff15???????? | // 81ff10030000 | cmp edi, 0x310 // 75d6 | jne 0xffffffd8 // e8???????? | // 85c0 | test eax, eax // 740a | je 0xc $sequence_40 = { 5d c20c00 ff75ec ff75d8 e8???????? 83c40c ff75ec } // n = 7, score = 100 // 5d | xor eax, ebp // c20c00 | mov dword ptr [ebp - 8], eax // ff75ec | push ebx // ff75d8 | mov edi, eax // e8???????? | // 83c40c | lea edx, [ecx + 1] // ff75ec | mov al, byte ptr [ecx] $sequence_41 = { 0f84fe010000 8b35???????? 68???????? 57 ffd6 } // n = 5, score = 100 // 0f84fe010000 | push ebx // 8b35???????? | // 68???????? | // 57 | mov ebp, esp // ffd6 | sub esp, 0x448 $sequence_42 = { ff75d8 8d831e0d0000 ff75ec 50 e8???????? ff75ec } // n = 6, score = 100 // ff75d8 | add esp, 0xc // 8d831e0d0000 | push dword ptr [ebp - 0x14] // ff75ec | je 0x193 // 50 | cmp dword ptr [edi + 4], 0 // e8???????? | // ff75ec | je 0x97 $sequence_43 = { 8d542404 51 56 50 50 8b84249c000000 } // n = 6, score = 100 // 8d542404 | add esp, 0xc // 51 | cdq // 56 | mov ecx, 7 // 50 | mov eax, dword ptr [esp + 0x34] // 50 | mov ecx, dword ptr [esp + 0x28] // 8b84249c000000 | mov edx, dword ptr [esp + 0x24] $sequence_44 = { 8b148d40904100 33d0 a1???????? 33d0 33c0 8915???????? } // n = 6, score = 100 // 8b148d40904100 | push 4 // 33d0 | mov dword ptr [esp + 0x18], eax // a1???????? | // 33d0 | lea edx, [esp + 4] // 33c0 | push ecx // 8915???????? | condition: 7 of them and filesize < 860160 }
If your designated proposal does not fit in any other category, feel free to write a free-text in the comment field below. Changes regarding references should be proposed on the Malpedia library page.
Your suggestion will be reviewed before being published. Thank you for contributing!
YYYY-MM-DD
YYYY-MM
YYYY
