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rule win_goggles_auto { meta: author = "Felix Bilstein - yara-signator at cocacoding dot com" date = "2020-12-22" version = "1" description = "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.goggles" malpedia_rule_date = "20201222" malpedia_hash = "30354d830a29f0fbd3714d93d94dea941d77a130" malpedia_version = "20201023" 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 = { 8a8010400010 88441efe 8a4c2fff 83e13f 4a 8a8110400010 } // n = 6, score = 100 // 8a8010400010 | mov al, byte ptr [eax + 0x10004010] // 88441efe | mov byte ptr [esi + ebx - 2], al // 8a4c2fff | mov cl, byte ptr [edi + ebp - 1] // 83e13f | and ecx, 0x3f // 4a | dec edx // 8a8110400010 | mov al, byte ptr [ecx + 0x10004010] $sequence_1 = { 33c0 f2ae f7d1 2bf9 8d94242c010000 8bf7 8bfa } // n = 7, score = 100 // 33c0 | xor eax, eax // f2ae | repne scasb al, byte ptr es:[edi] // f7d1 | not ecx // 2bf9 | sub edi, ecx // 8d94242c010000 | lea edx, [esp + 0x12c] // 8bf7 | mov esi, edi // 8bfa | mov edi, edx $sequence_2 = { 52 68???????? ff15???????? 8a4c2b02 2d???????? 0ac8 8b44243c } // n = 7, score = 100 // 52 | push edx // 68???????? | // ff15???????? | // 8a4c2b02 | mov cl, byte ptr [ebx + ebp + 2] // 2d???????? | // 0ac8 | or cl, al // 8b44243c | mov eax, dword ptr [esp + 0x3c] $sequence_3 = { a0???????? 55 57 88442410 b940000000 } // n = 5, score = 100 // a0???????? | // 55 | push ebp // 57 | push edi // 88442410 | mov byte ptr [esp + 0x10], al // b940000000 | mov ecx, 0x40 $sequence_4 = { 8d4c244c 50 8d54247c 51 52 } // n = 5, score = 100 // 8d4c244c | lea ecx, [esp + 0x4c] // 50 | push eax // 8d54247c | lea edx, [esp + 0x7c] // 51 | push ecx // 52 | push edx $sequence_5 = { 50 8d842484000000 50 51 } // n = 4, score = 100 // 50 | push eax // 8d842484000000 | lea eax, [esp + 0x84] // 50 | push eax // 51 | push ecx $sequence_6 = { 85c0 7416 56 50 8d8424bc040000 } // n = 5, score = 100 // 85c0 | test eax, eax // 7416 | je 0x18 // 56 | push esi // 50 | push eax // 8d8424bc040000 | lea eax, [esp + 0x4bc] $sequence_7 = { f2ae f7d1 49 bf???????? 894c2404 83c9ff } // n = 6, score = 100 // f2ae | repne scasb al, byte ptr es:[edi] // f7d1 | not ecx // 49 | dec ecx // bf???????? | // 894c2404 | mov dword ptr [esp + 4], ecx // 83c9ff | or ecx, 0xffffffff $sequence_8 = { 52 51 ff15???????? 8a142b 2d???????? } // n = 5, score = 100 // 52 | push edx // 51 | push ecx // ff15???????? | // 8a142b | mov dl, byte ptr [ebx + ebp] // 2d???????? | $sequence_9 = { 8d8c2484010000 2bc2 50 8d842484000000 50 } // n = 5, score = 100 // 8d8c2484010000 | lea ecx, [esp + 0x184] // 2bc2 | sub eax, edx // 50 | push eax // 8d842484000000 | lea eax, [esp + 0x84] // 50 | push eax condition: 7 of them and filesize < 57344 }
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