Actor(s): Higaisa
There is no description at this point.
rule win_unidentified_076_auto { meta: author = "Felix Bilstein - yara-signator at cocacoding dot com" date = "2023-01-25" version = "1" description = "Detects win.unidentified_076." 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_076" 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 = { e8???????? 498bfe 4533c9 488b83c8000000 8b2cf0 468b2428 8b842490000000 } // n = 7, score = 100 // e8???????? | // 498bfe | dec eax // 4533c9 | mov dword ptr [esp + 0x18], ebx // 488b83c8000000 | dec eax // 8b2cf0 | mov ebp, dword ptr [esp + 0x58] // 468b2428 | dec eax // 8b842490000000 | mov edi, dword ptr [esp + 0x60] $sequence_1 = { 81fd05140000 7e0a b8fdffffff e9???????? 8b473c 33c9 394764 } // n = 7, score = 100 // 81fd05140000 | mov ecx, dword ptr [ebx + 0x108] // 7e0a | inc esp // b8fdffffff | mov eax, eax // e9???????? | // 8b473c | dec ecx // 33c9 | mov edx, esi // 394764 | dec esp $sequence_2 = { 89442430 894340 483bd6 744d 8b7c2420 4c8b2a 8bc7 } // n = 7, score = 100 // 89442430 | dec eax // 894340 | mov eax, dword ptr [edi + 0xc8] // 483bd6 | dec ecx // 744d | mov ecx, edi // 8b7c2420 | call dword ptr [eax + 0x80] // 4c8b2a | mov dword ptr [esi + 0x2cc], ebx // 8bc7 | mov ebp, ebx $sequence_3 = { 0f8436020000 448bce 448bc5 ba05140000 33c9 } // n = 5, score = 100 // 0f8436020000 | inc ecx // 448bce | mov eax, 0x1000 // 448bc5 | inc esp // ba05140000 | lea ecx, [ecx + 4] // 33c9 | je 0x1ecd $sequence_4 = { 488b4b70 488d83b0080000 4533c9 c744242810000000 } // n = 4, score = 100 // 488b4b70 | lea edx, [ebp + 0x58] // 488d83b0080000 | call dword ptr [eax + 0x740] // 4533c9 | mov ebx, edi // c744242810000000 | inc esp $sequence_5 = { 0f8f6fffffff 488b87c8000000 33db ff9050010000 } // n = 4, score = 100 // 0f8f6fffffff | mov edx, 0x1965 // 488b87c8000000 | jne 0x21f // 33db | mov edx, 0x400 // ff9050010000 | call dword ptr [edi + 0xf8] $sequence_6 = { 488bcd ff9020070000 488b87c8000000 488b9424a0000000 488d9f5c060000 488bcb ff90f0070000 } // n = 7, score = 100 // 488bcd | cmp edx, esi // ff9020070000 | dec eax // 488b87c8000000 | lea esi, [edi + 0x120] // 488b9424a0000000 | inc ecx // 488d9f5c060000 | mov esi, 0x30 // 488bcb | dec eax // ff90f0070000 | test esi, esi $sequence_7 = { 4885c0 741d 448bcd 458bc6 8bd6 33c9 ff97f8000000 } // n = 7, score = 100 // 4885c0 | mov eax, dword ptr [esi + 0xc8] // 741d | dec esp // 448bcd | mov eax, edi // 458bc6 | xor edx, edx // 8bd6 | dec eax // 33c9 | mov ecx, dword ptr [esi + 0x1d0] // ff97f8000000 | dec eax $sequence_8 = { 4c8b93c8000000 488b4b70 488d83b0080000 4533c9 c744242810000000 4889442420 41ff92e0040000 } // n = 7, score = 100 // 4c8b93c8000000 | dec eax // 488b4b70 | mov edi, dword ptr [ecx + 0x1f0] // 488d83b0080000 | dec eax // 4533c9 | and dword ptr [esp + 0x68], 0 // c744242810000000 | and dword ptr [esp + 0x50], 0 // 4889442420 | dec ecx // 41ff92e0040000 | mov esi, eax $sequence_9 = { e8???????? 41bb01000000 8b942488000000 8b8c2498000000 442be1 4c03f1 } // n = 6, score = 100 // e8???????? | // 41bb01000000 | dec esp // 8b942488000000 | mov ecx, esi // 8b8c2498000000 | inc ecx // 442be1 | mov eax, 0x8000 // 4c03f1 | call dword ptr [ebx + 0x100] condition: 7 of them and filesize < 114688 }
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