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 = "2023-12-06" 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 = "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 = { 488b5370 488d4520 488bcb 4889442420 e8???????? 8bc8 eb7c } // n = 7, score = 100 // 488b5370 | call dword ptr [eax + 0x80] // 488d4520 | test eax, eax // 488bcb | dec eax // 4889442420 | mov ecx, edi // e8???????? | // 8bc8 | dec eax // eb7c | mov eax, dword ptr [edi + 0xc8] $sequence_1 = { 747b 8d5620 448bce 448bc5 33c9 ff97f8000000 48898748020000 } // n = 7, score = 100 // 747b | inc esp // 8d5620 | cmp dword ptr [ebx + 0x40], ecx // 448bce | jne 0x1b1e // 448bc5 | inc esp // 33c9 | cmp dword ptr [ebx + 0x78], ecx // ff97f8000000 | jl 0x1a80 // 48898748020000 | inc ebp $sequence_2 = { 488bcf ff9080000000 33d2 33c9 4c63c0 85c0 7e29 } // n = 7, score = 100 // 488bcf | xor eax, eax // ff9080000000 | test ebp, ebp // 33d2 | setle al // 33c9 | inc esp // 4c63c0 | cmp esp, eax // 85c0 | dec ecx // 7e29 | arpl word ptr [esi], ax $sequence_3 = { 48894178 488b8f80000000 488b4618 48034f50 48898880000000 488b8f90000000 488b4618 } // n = 7, score = 100 // 48894178 | mov ecx, esi // 488b8f80000000 | call dword ptr [edx + 0x170] // 488b4618 | dec eax // 48034f50 | mov ebp, dword ptr [esp + 0x60] // 48898880000000 | mov eax, ebx // 488b8f90000000 | dec eax // 488b4618 | mov ebx, dword ptr [esp + 0x58] $sequence_4 = { 458d6502 448bc7 488bce 4489642428 89442420 e8???????? 85c0 } // n = 7, score = 100 // 458d6502 | mov esi, dword ptr [esp + 0x48] // 448bc7 | mov eax, edi // 488bce | dec eax // 4489642428 | add esp, 0x30 // 89442420 | pop edi // e8???????? | // 85c0 | ret $sequence_5 = { 488d8d40150000 e8???????? 488d1587720000 488d8d14090000 8985d4000000 488d05c3130000 c7853001000000080000 } // n = 7, score = 100 // 488d8d40150000 | jmp 0x18d6 // e8???????? | // 488d1587720000 | dec ecx // 488d8d14090000 | mov ecx, dword ptr [eax] // 8985d4000000 | dec ecx // 488d05c3130000 | mov eax, dword ptr [eax + 8] // c7853001000000080000 | dec ecx $sequence_6 = { 4533c9 488bcf 448d420c 48895c2420 e8???????? eb05 bb01000000 } // n = 7, score = 100 // 4533c9 | dec eax // 488bcf | mov eax, dword ptr [esp + 0x30] // 448d420c | dec eax // 48895c2420 | lea ecx, [edi + 0x5bc] // e8???????? | // eb05 | dec eax // bb01000000 | mov dword ptr [esp + 0xa0], eax $sequence_7 = { 7f0b 41b907000000 e9???????? 488b83c8000000 488b9360020000 488d8b5c060000 ff90f0070000 } // n = 7, score = 100 // 7f0b | je 0x12f6 // 41b907000000 | sub ecx, 0xa // e9???????? | // 488b83c8000000 | sub ecx, 0xa // 488b9360020000 | je 0x12ca // 488d8b5c060000 | cmp ecx, 0x14 // ff90f0070000 | je 0x12ab $sequence_8 = { 89442420 e8???????? eb56 83f801 7529 8b8714120000 448b8f10120000 } // n = 7, score = 100 // 89442420 | mov dword ptr [ebx + 0x290], eax // e8???????? | // eb56 | dec eax // 83f801 | test eax, eax // 7529 | dec eax // 8b8714120000 | mov eax, dword ptr [ebx + 0xc8] // 448b8f10120000 | mov dword ptr [esp + 0x20], edi $sequence_9 = { 415e 415c c3 817d0c08020000 7c05 458bcc eba2 } // n = 7, score = 100 // 415e | xor byte ptr [edx], al // 415c | dec eax // c3 | inc edx // 817d0c08020000 | dec ecx // 7c05 | dec eax // 458bcc | dec eax // eba2 | cmovge ecx, esi condition: 7 of them and filesize < 114688 }
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