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 = "2023-07-11" 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 = "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 = { 4c89c3 4989cc 488931 4c8b12 4d8d0442 4c89d2 e8???????? } // n = 7, score = 300 // 4c89c3 | dec eax // 4989cc | inc eax // 488931 | dec eax // 4c8b12 | cmp eax, 8 // 4d8d0442 | jne 0x43 // 4c89d2 | dec eax // e8???????? | $sequence_1 = { 488b8c2488000000 48894c2428 0fbe8c2480000000 894c2420 4c89e1 ff5010 4c89e0 } // n = 7, score = 300 // 488b8c2488000000 | dec eax // 48894c2428 | sub esp, 0x38 // 0fbe8c2480000000 | vmovups xmmword ptr [esp + 0x20], xmm0 // 894c2420 | test al, al // 4c89e1 | je 0x75 // ff5010 | dec eax // 4c89e0 | lea eax, [0x17cd9c] $sequence_2 = { 488b4500 488d7e10 48c7430800000000 488906 488b40e8 48897c2420 48891406 } // n = 7, score = 300 // 488b4500 | pop edi // 488d7e10 | ret // 48c7430800000000 | dec eax // 488906 | lea ecx, [0x16d1ec] // 488b40e8 | test eax, eax // 48897c2420 | dec eax // 48891406 | add esp, 0x38 $sequence_3 = { e8???????? 4d85e4 740d 4c89e1 e8???????? e8???????? 488b4f08 } // n = 7, score = 300 // e8???????? | // 4d85e4 | mov edx, dword ptr [eax] // 740d | dec eax // 4c89e1 | add eax, dword ptr [edx - 0x18] // e8???????? | // e8???????? | // 488b4f08 | dec eax $sequence_4 = { 8903 488b742420 4883c304 483b742428 0f8494000000 4839df 0f84b9000000 } // n = 7, score = 300 // 8903 | test al, al // 488b742420 | je 0x97a6 // 4883c304 | je 0xd16 // 483b742428 | mov word ptr [esp + 0x124], 0xa189 // 0f8494000000 | mov byte ptr [esp + 0x126], 0x77 // 4839df | test al, al // 0f84b9000000 | je 0x1a9d2 $sequence_5 = { 88450a 4c896b10 488b4c2458 48897328 4c897b38 4c897348 c6436f01 } // n = 7, score = 300 // 88450a | lea ecx, [0x13d5cc] // 4c896b10 | mov word ptr [esp + 0x124], 0xc040 // 488b4c2458 | mov byte ptr [esp + 0x126], 0x9e // 48897328 | test al, al // 4c897b38 | je 0x13871 // 4c897348 | je 0x766 // c6436f01 | mov word ptr [esp + 0x124], 0xc040 $sequence_6 = { 4c89d2 e8???????? 488903 4883c430 5b c3 4989c9 } // n = 7, score = 300 // 4c89d2 | je 0x1a26 // e8???????? | // 488903 | dec eax // 4883c430 | lea edx, [0x150eca] // 5b | cmp byte ptr [eax + 9], 0 // c3 | dec ecx // 4989c9 | mov ebp, eax $sequence_7 = { 4c89fa 89c1 4429f9 4084ff 0f8549ffffff 41f7c200020000 0f843cffffff } // n = 7, score = 300 // 4c89fa | lea edx, [0x13d616] // 89c1 | cmp byte ptr [eax + 0xe], 0 // 4429f9 | dec ecx // 4084ff | mov ebp, eax // 0f8549ffffff | je 0x1db7 // 41f7c200020000 | dec eax // 0f843cffffff | lea ecx, [esp + 0xe200] $sequence_8 = { 8944242c 498b0424 488b40e8 4d8bac04e8000000 498b6d18 4d8b7d10 4889e9 } // n = 7, score = 300 // 8944242c | mov dword ptr [esp + 0x120], 0x6269d8d6 // 498b0424 | je 0x1e39 // 488b40e8 | dec eax // 4d8bac04e8000000 | mov ecx, eax // 498b6d18 | dec eax // 4d8b7d10 | lea ecx, [esp + 0xa540] // 4889e9 | dec esp $sequence_9 = { e8???????? 418b442414 83f80a 7580 0f1f00 49ff442430 49c744242800000000 } // n = 7, score = 300 // e8???????? | // 418b442414 | test al, al // 83f80a | je 0xf6d // 7580 | dec eax // 0f1f00 | lea eax, [0x15f857] // 49ff442430 | dec eax // 49c744242800000000 | add esp, 0x48 condition: 7 of them and filesize < 3345408 }
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