Actor(s): Shamoon, Magic Hound, Timberworm, COBALT GIPSY
There is no description at this point.
rule win_disttrack_auto { meta: author = "Felix Bilstein - yara-signator at cocacoding dot com" date = "2020-12-22" version = "1" description = "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.disttrack" malpedia_rule_date = "20201222" malpedia_hash = "30354d830a29f0fbd3714d93d94dea941d77a130" malpedia_version = "20201023" 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 = { 52 6a00 6a00 6848000700 } // n = 4, score = 200 // 52 | push edx // 6a00 | push 0 // 6a00 | push 0 // 6848000700 | push 0x70048 $sequence_1 = { 68???????? ff15???????? 8d45dc 50 ff15???????? 8b4ddc } // n = 6, score = 200 // 68???????? | // ff15???????? | // 8d45dc | lea eax, [ebp - 0x24] // 50 | push eax // ff15???????? | // 8b4ddc | mov ecx, dword ptr [ebp - 0x24] $sequence_2 = { ff15???????? 5d 5b 8bc7 5f 5e } // n = 6, score = 200 // ff15???????? | // 5d | pop ebp // 5b | pop ebx // 8bc7 | mov eax, edi // 5f | pop edi // 5e | pop esi $sequence_3 = { 58 5e 5d c3 6a0c } // n = 5, score = 200 // 58 | pop eax // 5e | pop esi // 5d | pop ebp // c3 | ret // 6a0c | push 0xc $sequence_4 = { e8???????? 6a07 e8???????? 59 c3 6a10 } // n = 6, score = 200 // e8???????? | // 6a07 | push 7 // e8???????? | // 59 | pop ecx // c3 | ret // 6a10 | push 0x10 $sequence_5 = { 83c404 50 e8???????? 83c404 68???????? ff15???????? e8???????? } // n = 7, score = 200 // 83c404 | add esp, 4 // 50 | push eax // e8???????? | // 83c404 | add esp, 4 // 68???????? | // ff15???????? | // e8???????? | $sequence_6 = { 4c8b0d???????? 4889442428 488d05ecf60000 8bd3 } // n = 4, score = 100 // 4c8b0d???????? | // 4889442428 | dec edx // 488d05ecf60000 | lea ecx, [ebp + ebx*2 - 0x80] // 8bd3 | dec eax $sequence_7 = { 4c895f18 4533c0 33d2 488d4f18 e8???????? 90 488bc7 } // n = 7, score = 100 // 4c895f18 | dec eax // 4533c0 | sub esp, 0x30 // 33d2 | dec eax // 488d4f18 | mov dword ptr [esp + 0x20], 0xfffffffe // e8???????? | // 90 | inc ecx // 488bc7 | mov eax, eax $sequence_8 = { c1f905 8b0c8d00864300 83e21f c1e206 385c1104 7506 } // n = 6, score = 100 // c1f905 | sar ecx, 5 // 8b0c8d00864300 | mov ecx, dword ptr [ecx*4 + 0x438600] // 83e21f | and edx, 0x1f // c1e206 | shl edx, 6 // 385c1104 | cmp byte ptr [ecx + edx + 4], bl // 7506 | jne 8 $sequence_9 = { e8???????? b001 488b8c2440020000 4833cc } // n = 4, score = 100 // e8???????? | // b001 | dec esp // 488b8c2440020000 | mov edx, edx // 4833cc | dec eax $sequence_10 = { 498bcd 448bc0 e8???????? 8bd0 } // n = 4, score = 100 // 498bcd | mov dword ptr [esp + 0x28], eax // 448bc0 | dec eax // e8???????? | // 8bd0 | lea eax, [0xf6ec] $sequence_11 = { 8b8424b0000000 83c804 83e017 898424b0000000 858424b4000000 740d } // n = 6, score = 100 // 8b8424b0000000 | mov eax, dword ptr [esp + 0xb0] // 83c804 | or eax, 4 // 83e017 | and eax, 0x17 // 898424b0000000 | mov dword ptr [esp + 0xb0], eax // 858424b4000000 | test dword ptr [esp + 0xb4], eax // 740d | je 0xf $sequence_12 = { 8d4de0 51 8b4dc8 e8???????? 50 8d4dec e8???????? } // n = 7, score = 100 // 8d4de0 | lea ecx, [ebp - 0x20] // 51 | push ecx // 8b4dc8 | mov ecx, dword ptr [ebp - 0x38] // e8???????? | // 50 | push eax // 8d4dec | lea ecx, [ebp - 0x14] // e8???????? | $sequence_13 = { 752b 8b542434 8b4a04 8b440c40 8d4c0c34 83c802 } // n = 6, score = 100 // 752b | jne 0x2d // 8b542434 | mov edx, dword ptr [esp + 0x34] // 8b4a04 | mov ecx, dword ptr [edx + 4] // 8b440c40 | mov eax, dword ptr [esp + ecx + 0x40] // 8d4c0c34 | lea ecx, [esp + ecx + 0x34] // 83c802 | or eax, 2 $sequence_14 = { 8b4d08 6a01 8d55fc 52 50 51 } // n = 6, score = 100 // 8b4d08 | add esp, 4 // 6a01 | push eax // 8d55fc | add esp, 4 // 52 | lea eax, [ebp - 0x24] // 50 | push eax // 51 | mov ecx, dword ptr [ebp - 0x24] $sequence_15 = { 40 89442428 83f801 0f8ce4f7ffff 8b442430 } // n = 5, score = 100 // 40 | inc eax // 89442428 | mov dword ptr [esp + 0x28], eax // 83f801 | cmp eax, 1 // 0f8ce4f7ffff | jl 0xfffff7ea // 8b442430 | mov eax, dword ptr [esp + 0x30] $sequence_16 = { 6a00 56 ff15???????? 57 ff15???????? 5f 5b } // n = 7, score = 100 // 6a00 | pop esi // 56 | push ebx // ff15???????? | // 57 | pop ebp // ff15???????? | // 5f | pop ebx // 5b | mov eax, edi $sequence_17 = { 8b4c242c 8b5104 8d742444 c744142c1c2b4200 e8???????? c784245806000002000000 } // n = 6, score = 100 // 8b4c242c | add esp, 4 // 8b5104 | push eax // 8d742444 | add esp, 4 // c744142c1c2b4200 | pop ebp // e8???????? | // c784245806000002000000 | pop ebx $sequence_18 = { ff15???????? 85c0 0f854cffffff 57 } // n = 4, score = 100 // ff15???????? | // 85c0 | test eax, eax // 0f854cffffff | jne 0xffffff52 // 57 | push edi $sequence_19 = { 033485a08d4200 8b45f8 8b00 8906 8b45fc } // n = 5, score = 100 // 033485a08d4200 | pop edi // 8b45f8 | pop esi // 8b00 | add esp, 4 // 8906 | push eax // 8b45fc | add esp, 4 $sequence_20 = { cc 4c8d05e0b10000 498bd4 488bcd e8???????? 85c0 7541 } // n = 7, score = 100 // cc | mov edx, ebx // 4c8d05e0b10000 | dec ecx // 498bd4 | mov ecx, ebp // 488bcd | inc esp // e8???????? | // 85c0 | mov eax, eax // 7541 | mov edx, eax $sequence_21 = { 488d0587730100 4889442438 4c89742430 418d5110 } // n = 4, score = 100 // 488d0587730100 | dec eax // 4889442438 | mov ecx, ebp // 4c89742430 | test eax, eax // 418d5110 | jne 0x52 $sequence_22 = { 84c0 7577 498bcd e8???????? 4a8d4c5d80 } // n = 5, score = 100 // 84c0 | test al, al // 7577 | jne 0x79 // 498bcd | dec ecx // e8???????? | // 4a8d4c5d80 | mov ecx, ebp $sequence_23 = { e8???????? 399c24a0000000 0f844b020000 8b442410 } // n = 4, score = 100 // e8???????? | // 399c24a0000000 | cmp dword ptr [esp + 0xa0], ebx // 0f844b020000 | je 0x251 // 8b442410 | mov eax, dword ptr [esp + 0x10] $sequence_24 = { 50 e8???????? 83c404 8b442424 8b8c2498030000 64890d00000000 } // n = 6, score = 100 // 50 | push eax // e8???????? | // 83c404 | add esp, 4 // 8b442424 | mov eax, dword ptr [esp + 0x24] // 8b8c2498030000 | mov ecx, dword ptr [esp + 0x398] // 64890d00000000 | mov dword ptr fs:[0], ecx $sequence_25 = { 4883ec30 48c7442420feffffff 418bc0 4c8bd2 488bd9 } // n = 5, score = 100 // 4883ec30 | int3 // 48c7442420feffffff | dec esp // 418bc0 | lea eax, [0xb1e0] // 4c8bd2 | dec ecx // 488bd9 | mov edx, esp condition: 7 of them and filesize < 1112064 }
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