Actor(s): APT32
There is no description at this point.
rule win_unidentified_068_auto { meta: author = "Felix Bilstein - yara-signator at cocacoding dot com" date = "2023-12-06" version = "1" description = "Detects win.unidentified_068." 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_068" 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 = { 75ee 394624 7417 50 8bce e8???????? } // n = 6, score = 100 // 75ee | jne 0xfffffff0 // 394624 | cmp dword ptr [esi + 0x24], eax // 7417 | je 0x19 // 50 | push eax // 8bce | mov ecx, esi // e8???????? | $sequence_1 = { 43 8bc8 3bde 72e6 8b75e0 8b5df4 8b55f8 } // n = 7, score = 100 // 43 | inc ebx // 8bc8 | mov ecx, eax // 3bde | cmp ebx, esi // 72e6 | jb 0xffffffe8 // 8b75e0 | mov esi, dword ptr [ebp - 0x20] // 8b5df4 | mov ebx, dword ptr [ebp - 0xc] // 8b55f8 | mov edx, dword ptr [ebp - 8] $sequence_2 = { 85ff 741b 8b4674 ff7514 8b0c98 83c118 e8???????? } // n = 7, score = 100 // 85ff | test edi, edi // 741b | je 0x1d // 8b4674 | mov eax, dword ptr [esi + 0x74] // ff7514 | push dword ptr [ebp + 0x14] // 8b0c98 | mov ecx, dword ptr [eax + ebx*4] // 83c118 | add ecx, 0x18 // e8???????? | $sequence_3 = { 59 57 8bd8 c745fc04000000 8d45fc 50 53 } // n = 7, score = 100 // 59 | pop ecx // 57 | push edi // 8bd8 | mov ebx, eax // c745fc04000000 | mov dword ptr [ebp - 4], 4 // 8d45fc | lea eax, [ebp - 4] // 50 | push eax // 53 | push ebx $sequence_4 = { 7406 8b08 50 ff5108 885d94 895df0 8d4df0 } // n = 7, score = 100 // 7406 | je 8 // 8b08 | mov ecx, dword ptr [eax] // 50 | push eax // ff5108 | call dword ptr [ecx + 8] // 885d94 | mov byte ptr [ebp - 0x6c], bl // 895df0 | mov dword ptr [ebp - 0x10], ebx // 8d4df0 | lea ecx, [ebp - 0x10] $sequence_5 = { 8d5648 8d4d88 e8???????? 59 83781408 7202 8b00 } // n = 7, score = 100 // 8d5648 | lea edx, [esi + 0x48] // 8d4d88 | lea ecx, [ebp - 0x78] // e8???????? | // 59 | pop ecx // 83781408 | cmp dword ptr [eax + 0x14], 8 // 7202 | jb 4 // 8b00 | mov eax, dword ptr [eax] $sequence_6 = { 660f13442450 8b4c2454 894c2458 8b4c2450 894c2450 8b4c2464 894c2428 } // n = 7, score = 100 // 660f13442450 | movlpd qword ptr [esp + 0x50], xmm0 // 8b4c2454 | mov ecx, dword ptr [esp + 0x54] // 894c2458 | mov dword ptr [esp + 0x58], ecx // 8b4c2450 | mov ecx, dword ptr [esp + 0x50] // 894c2450 | mov dword ptr [esp + 0x50], ecx // 8b4c2464 | mov ecx, dword ptr [esp + 0x64] // 894c2428 | mov dword ptr [esp + 0x28], ecx $sequence_7 = { d1f9 6a41 5f 894df0 8b34cd18aa4400 8b4d08 6a5a } // n = 7, score = 100 // d1f9 | sar ecx, 1 // 6a41 | push 0x41 // 5f | pop edi // 894df0 | mov dword ptr [ebp - 0x10], ecx // 8b34cd18aa4400 | mov esi, dword ptr [ecx*8 + 0x44aa18] // 8b4d08 | mov ecx, dword ptr [ebp + 8] // 6a5a | push 0x5a $sequence_8 = { 72ba 33f6 81fb10000020 0f45f3 85f6 7523 33db } // n = 7, score = 100 // 72ba | jb 0xffffffbc // 33f6 | xor esi, esi // 81fb10000020 | cmp ebx, 0x20000010 // 0f45f3 | cmovne esi, ebx // 85f6 | test esi, esi // 7523 | jne 0x25 // 33db | xor ebx, ebx $sequence_9 = { 8d4948 e8???????? 33c0 5d c20800 55 8bec } // n = 7, score = 100 // 8d4948 | lea ecx, [ecx + 0x48] // e8???????? | // 33c0 | xor eax, eax // 5d | pop ebp // c20800 | ret 8 // 55 | push ebp // 8bec | mov ebp, esp condition: 7 of them and filesize < 862208 }
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