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 = "2023-01-25" 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 = "20230124" malpedia_hash = "2ee0eebba83dce3d019a90519f2f972c0fcf9686" malpedia_version = "20230125" 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 = { 66440fbe4801 664439c9 0f84ea050000 4c89c0 4d8d4001 4939f0 75de } // n = 7, score = 100 // 66440fbe4801 | mov ecx, eax // 664439c9 | dec eax // 0f84ea050000 | mov eax, dword ptr [ebx] // 4c89c0 | dec eax // 4d8d4001 | mov ecx, ebx // 4939f0 | call dword ptr [eax + 8] // 75de | dec esp $sequence_1 = { 664189ee 4c89fa 4889442438 4c8d442470 4c8d4c2460 488b842420010000 66895c2448 } // n = 7, score = 100 // 664189ee | dec eax // 4c89fa | lea eax, [ebp + 0x28] // 4889442438 | dec esp // 4c8d442470 | mov ecx, esp // 4c8d4c2460 | xor eax, eax // 488b842420010000 | mov byte ptr [ebx + 0x162], 0 // 66895c2448 | xor edx, edx $sequence_2 = { f0418344240801 e9???????? f0418344240801 e9???????? b918000000 e8???????? c7400800000000 } // n = 7, score = 100 // f0418344240801 | dec eax // e9???????? | // f0418344240801 | mov dword ptr [ecx + 0x30], 0 // e9???????? | // b918000000 | mov dword ptr [ecx + 8], eax // e8???????? | // c7400800000000 | dec eax $sequence_3 = { 7415 83c301 83fb0b 75e5 31c0 4883c420 5b } // n = 7, score = 100 // 7415 | dec esp // 83c301 | mov eax, dword ptr [esp + 0x70] // 83fb0b | mov byte ptr [eax + edi], 0 // 75e5 | dec eax // 31c0 | mov edx, dword ptr [esi + 0x18] // 4883c420 | dec eax // 5b | mov ecx, dword ptr [esi + 0x10] $sequence_4 = { 80fa01 0f86d4000000 488d5001 488bbbd0000000 488dabd8000000 488993b0000000 440fb620 } // n = 7, score = 100 // 80fa01 | pop esi // 0f86d4000000 | pop edi // 488d5001 | pop ebp // 488bbbd0000000 | dec ebp // 488dabd8000000 | mov dword ptr [esp + 8], edx // 488993b0000000 | dec edx // 440fb620 | lea eax, [ebx + ecx] $sequence_5 = { ff5028 488b442428 488b68e8 488d4d01 e8???????? 4531c9 4989e8 } // n = 7, score = 100 // ff5028 | test eax, eax // 488b442428 | jle 0xb4 // 488b68e8 | mov eax, dword ptr [ebx] // 488d4d01 | dec eax // e8???????? | // 4531c9 | mov ecx, dword ptr [esp + 0x40] // 4989e8 | test eax, eax $sequence_6 = { c5f8112a c5f810ac2490000000 c5f8116a10 488b8424a0000000 48894220 83bc24800000000b 755e } // n = 7, score = 100 // c5f8112a | inc sp // c5f810ac2490000000 | mov dword ptr [edx + 6], ecx // c5f8116a10 | dec esp // 488b8424a0000000 | lea ecx, [ecx + 8] // 48894220 | dec ebp // 83bc24800000000b | cmp eax, ecx // 755e | je 0x3fd $sequence_7 = { 89c5 0f85d8000000 83ffff 0f94c0 4d85f6 7404 84c0 } // n = 7, score = 100 // 89c5 | dec eax // 0f85d8000000 | add eax, 2 // 83ffff | dec ecx // 0f94c0 | cmp ebp, eax // 4d85f6 | jne 0xe10 // 7404 | cmp word ptr [esi + 0xb8], bx // 84c0 | je 0xe38 $sequence_8 = { 8bb588000000 f20f10b590000000 488945d8 8b8580000000 4989cc 4c89cb 488d0d45510700 } // n = 7, score = 100 // 8bb588000000 | dec eax // f20f10b590000000 | lea ecx, [0xadff0] // 488945d8 | cmp dx, 0x42 // 8b8580000000 | je 0x860 // 4989cc | lea eax, [esi - 0x44] // 4c89cb | mov ecx, eax // 488d0d45510700 | cmp al, 0x33 $sequence_9 = { 750a 488d4c2420 e8???????? 4c89e1 e8???????? 488d1521e20100 b909000000 } // n = 7, score = 100 // 750a | nop // 488d4c2420 | dec eax // e8???????? | // 4c89e1 | mov ecx, dword ptr [ebx + 0x70] // e8???????? | // 488d1521e20100 | movzx ebp, word ptr [esi] // b909000000 | dec esp condition: 7 of them and filesize < 2362368 }
If your designated proposal does not fit in any other category, feel free to write a free-text in the comment field below.
Please propose all changes regarding references on the Malpedia library page
Your suggestion will be reviewed before being published. Thank you for contributing!
YYYY-MM-DD
YYYY-MM
YYYY