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rule win_goggles_auto { meta: author = "Felix Bilstein - yara-signator at cocacoding dot com" date = "2023-01-25" version = "1" description = "Detects win.goggles." 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.goggles" 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 = { 83c404 83f804 0f8cbd000000 8bc8 c1e902 } // n = 5, score = 100 // 83c404 | add esp, 4 // 83f804 | cmp eax, 4 // 0f8cbd000000 | jl 0xc3 // 8bc8 | mov ecx, eax // c1e902 | shr ecx, 2 $sequence_1 = { eb43 83f802 753e 0fbe0437 50 68???????? } // n = 6, score = 100 // eb43 | jmp 0x45 // 83f802 | cmp eax, 2 // 753e | jne 0x40 // 0fbe0437 | movsx eax, byte ptr [edi + esi] // 50 | push eax // 68???????? | $sequence_2 = { ff15???????? 8d8c2480020000 89442420 51 6804010000 ff15???????? 6a2f } // n = 7, score = 100 // ff15???????? | // 8d8c2480020000 | lea ecx, [esp + 0x280] // 89442420 | mov dword ptr [esp + 0x20], eax // 51 | push ecx // 6804010000 | push 0x104 // ff15???????? | // 6a2f | push 0x2f $sequence_3 = { 83c9ff 8d7c244c f2ae f7d1 2bf9 } // n = 5, score = 100 // 83c9ff | or ecx, 0xffffffff // 8d7c244c | lea edi, [esp + 0x4c] // f2ae | repne scasb al, byte ptr es:[edi] // f7d1 | not ecx // 2bf9 | sub edi, ecx $sequence_4 = { 83c9ff 33c0 57 8bfa f2ae 8b442418 f7d1 } // n = 7, score = 100 // 83c9ff | or ecx, 0xffffffff // 33c0 | xor eax, eax // 57 | push edi // 8bfa | mov edi, edx // f2ae | repne scasb al, byte ptr es:[edi] // 8b442418 | mov eax, dword ptr [esp + 0x18] // f7d1 | not ecx $sequence_5 = { f3a5 8bcd 8d94247c010000 83e103 f3a4 bf???????? 83c9ff } // n = 7, score = 100 // f3a5 | rep movsd dword ptr es:[edi], dword ptr [esi] // 8bcd | mov ecx, ebp // 8d94247c010000 | lea edx, [esp + 0x17c] // 83e103 | and ecx, 3 // f3a4 | rep movsb byte ptr es:[edi], byte ptr [esi] // bf???????? | // 83c9ff | or ecx, 0xffffffff $sequence_6 = { 40 f6d2 8854041b 3bc5 7cf1 } // n = 5, score = 100 // 40 | inc eax // f6d2 | not dl // 8854041b | mov byte ptr [esp + eax + 0x1b], dl // 3bc5 | cmp eax, ebp // 7cf1 | jl 0xfffffff3 $sequence_7 = { 8be8 2bd6 56 57 03ea ffd3 57 } // n = 7, score = 100 // 8be8 | mov ebp, eax // 2bd6 | sub edx, esi // 56 | push esi // 57 | push edi // 03ea | add ebp, edx // ffd3 | call ebx // 57 | push edi $sequence_8 = { 83c414 ebc7 8b3d???????? 55 ffd7 } // n = 5, score = 100 // 83c414 | add esp, 0x14 // ebc7 | jmp 0xffffffc9 // 8b3d???????? | // 55 | push ebp // ffd7 | call edi $sequence_9 = { 51 6800040000 52 53 ffd7 85c0 } // n = 6, score = 100 // 51 | push ecx // 6800040000 | push 0x400 // 52 | push edx // 53 | push ebx // ffd7 | call edi // 85c0 | test eax, eax condition: 7 of them and filesize < 57344 }
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