Actor(s): APT29
There is no description at this point.
rule win_unidentified_098_auto { meta: author = "Felix Bilstein - yara-signator at cocacoding dot com" date = "2023-12-06" version = "1" description = "Detects win.unidentified_098." 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.unidentified_098" malpedia_rule_date = "20231130" malpedia_hash = "fc8a0e9f343f6d6ded9e7df1a64dac0cc68d7351" malpedia_version = "20230808" 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 = { c644247f00 e9???????? 41bdffffffff 4885db 7412 488b4310 483b4318 } // n = 7, score = 400 // c644247f00 | cmp eax, dword ptr [ebx + 8] // e9???????? | // 41bdffffffff | je 0x2df2 // 4885db | dec eax // 7412 | mov eax, dword ptr [eax - 8] // 488b4310 | dec eax // 483b4318 | test eax, eax $sequence_1 = { e9???????? 8d48bf 83f905 0f8716ffffff 83e837 c1e00c 89c6 } // n = 7, score = 400 // e9???????? | // 8d48bf | dec esp // 83f905 | lea eax, [esp + 0xb0] // 0f8716ffffff | mov edx, 0x65 // 83e837 | vmovups xmm4, xmmword ptr [edi + 0x48] // c1e00c | dec eax // 89c6 | mov eax, dword ptr [edi + 0x58] $sequence_2 = { 7eac 85c0 78a8 488b4318 31d2 4885c0 75ab } // n = 7, score = 400 // 7eac | inc ecx // 85c0 | mov ecx, 0x80000000 // 78a8 | dec esp // 488b4318 | cmp eax, ecx // 31d2 | jl 0xad // 4885c0 | dec esi // 75ab | lea eax, [ecx + eax*2] $sequence_3 = { f6c202 410f45c0 4883c102 01d2 668941fe 4939c9 75ce } // n = 7, score = 400 // f6c202 | mov edx, dword ptr [edi + 0x38] // 410f45c0 | dec eax // 4883c102 | cmp edx, dword ptr [edi + 0x40] // 01d2 | je 0x355 // 668941fe | dec esp // 4939c9 | mov dword ptr [edx], eax // 75ce | vmovups xmmword ptr [esp + 0xa0], xmm1 $sequence_4 = { b801000000 4d85c0 7486 488b542450 4c89e1 e8???????? 85c0 } // n = 7, score = 400 // b801000000 | pop edi // 4d85c0 | ret // 7486 | dec eax // 488b542450 | lea ecx, [0x16f8df] // 4c89e1 | je 0x36d // e8???????? | // 85c0 | dec eax $sequence_5 = { ff15???????? 410fb61424 e9???????? 4c89f8 4829d8 4801c7 4d85ed } // n = 7, score = 400 // ff15???????? | // 410fb61424 | dec esp // e9???????? | // 4c89f8 | lea ebp, [ebx + 0x10] // 4829d8 | dec eax // 4801c7 | mov esi, dword ptr [edi + 8] // 4d85ed | dec esp $sequence_6 = { 85d2 0f88d5000000 4c8d5904 4189d2 4c8d4910 83fa0f 7e33 } // n = 7, score = 400 // 85d2 | vmovups xmm4, xmmword ptr [edi + 0x48] // 0f88d5000000 | dec eax // 4c8d5904 | mov eax, dword ptr [edi + 0x58] // 4189d2 | dec esp // 4c8d4910 | lea ebp, [esp + 0x190] // 83fa0f | mov word ptr [esp + 0x134], 0x77c3 // 7e33 | mov byte ptr [esp + 0x136], 0xcc $sequence_7 = { 488d542440 4939d4 7411 4c89e1 8844242f e8???????? 0fb644242f } // n = 7, score = 400 // 488d542440 | dec eax // 4939d4 | mov edx, dword ptr [esp + 0x100] // 7411 | dec eax // 4c89e1 | mov edi, 0x61766e69 // 8844242f | insb byte ptr es:[edi], dx // e8???????? | // 0fb644242f | imul esp, dword ptr [edi + ebx*2 + 0x48], 0x657469bd $sequence_8 = { 897c2450 41bd01000000 44894c2434 4889442458 e9???????? 488b03 4489442434 } // n = 7, score = 400 // 897c2450 | je 0x1bcb // 41bd01000000 | dec eax // 44894c2434 | lea eax, [0x1752ab] // 4889442458 | dec eax // e9???????? | // 488b03 | add esp, 0x38 // 4489442434 | ret $sequence_9 = { e9???????? 498b4610 493b4618 0f838d010000 0fb700 6683f8ff b900000000 } // n = 7, score = 400 // e9???????? | // 498b4610 | dec eax // 493b4618 | lea ecx, [0x17593e] // 0f838d010000 | vmovups xmm1, xmmword ptr [esp + 0x20] // 0fb700 | dec eax // 6683f8ff | mov eax, dword ptr [esp + 0x30] // b900000000 | dec eax condition: 7 of them and filesize < 3345408 }
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