Zeus derivate, no known public references.
rule win_unidentified_069_auto { meta: author = "Felix Bilstein - yara-signator at cocacoding dot com" date = "2023-01-25" version = "1" description = "Detects win.unidentified_069." 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_069" 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 = { 8bf0 8975e0 e8???????? 84c0 0f8492010000 33db 8bc6 } // n = 7, score = 100 // 8bf0 | mov esi, eax // 8975e0 | mov dword ptr [ebp - 0x20], esi // e8???????? | // 84c0 | test al, al // 0f8492010000 | je 0x198 // 33db | xor ebx, ebx // 8bc6 | mov eax, esi $sequence_1 = { 8bf8 e8???????? 8bf0 8b450c 03f6 8930 8d842410010000 } // n = 7, score = 100 // 8bf8 | mov edi, eax // e8???????? | // 8bf0 | mov esi, eax // 8b450c | mov eax, dword ptr [ebp + 0xc] // 03f6 | add esi, esi // 8930 | mov dword ptr [eax], esi // 8d842410010000 | lea eax, [esp + 0x110] $sequence_2 = { 57 68???????? bb???????? 53 33ed ffd6 8b3d???????? } // n = 7, score = 100 // 57 | push edi // 68???????? | // bb???????? | // 53 | push ebx // 33ed | xor ebp, ebp // ffd6 | call esi // 8b3d???????? | $sequence_3 = { 7405 ff4634 eb32 8d75d0 e8???????? 8b7508 } // n = 6, score = 100 // 7405 | je 7 // ff4634 | inc dword ptr [esi + 0x34] // eb32 | jmp 0x34 // 8d75d0 | lea esi, [ebp - 0x30] // e8???????? | // 8b7508 | mov esi, dword ptr [ebp + 8] $sequence_4 = { 6aff 8bc7 50 ff7508 ffd6 6a24 } // n = 6, score = 100 // 6aff | push -1 // 8bc7 | mov eax, edi // 50 | push eax // ff7508 | push dword ptr [ebp + 8] // ffd6 | call esi // 6a24 | push 0x24 $sequence_5 = { 68???????? b812939384 e8???????? b001 8be5 5d c20400 } // n = 7, score = 100 // 68???????? | // b812939384 | mov eax, 0x84939312 // e8???????? | // b001 | mov al, 1 // 8be5 | mov esp, ebp // 5d | pop ebp // c20400 | ret 4 $sequence_6 = { 85ff 0f84a1000000 803f00 0f8498000000 8b5c0108 85db 0f848c000000 } // n = 7, score = 100 // 85ff | test edi, edi // 0f84a1000000 | je 0xa7 // 803f00 | cmp byte ptr [edi], 0 // 0f8498000000 | je 0x9e // 8b5c0108 | mov ebx, dword ptr [ecx + eax + 8] // 85db | test ebx, ebx // 0f848c000000 | je 0x92 $sequence_7 = { 53 56 57 8bf8 8d7708 } // n = 5, score = 100 // 53 | push ebx // 56 | push esi // 57 | push edi // 8bf8 | mov edi, eax // 8d7708 | lea esi, [edi + 8] $sequence_8 = { 8b08 50 ff5108 8b75ec 8b06 56 ff5008 } // n = 7, score = 100 // 8b08 | mov ecx, dword ptr [eax] // 50 | push eax // ff5108 | call dword ptr [ecx + 8] // 8b75ec | mov esi, dword ptr [ebp - 0x14] // 8b06 | mov eax, dword ptr [esi] // 56 | push esi // ff5008 | call dword ptr [eax + 8] $sequence_9 = { 668906 8d45fc 50 8d85ecf7ffff 50 33ff 57 } // n = 7, score = 100 // 668906 | mov word ptr [esi], ax // 8d45fc | lea eax, [ebp - 4] // 50 | push eax // 8d85ecf7ffff | lea eax, [ebp - 0x814] // 50 | push eax // 33ff | xor edi, edi // 57 | push edi condition: 7 of them and filesize < 434176 }
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