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rule win_glitch_pos_auto { meta: author = "Felix Bilstein - yara-signator at cocacoding dot com" date = "2026-01-05" version = "1" description = "Detects win.glitch_pos." 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.glitch_pos" malpedia_rule_date = "20260105" malpedia_hash = "19b79e7cab4eaf532122e5b45a77dd8f6bb5cc79" malpedia_version = "20251219" 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 = { 8b00 ff7508 ff9010030000 50 8d45c4 50 e8???????? } // n = 7, score = 100 // 8b00 | mov eax, dword ptr [eax] // ff7508 | push dword ptr [ebp + 8] // ff9010030000 | call dword ptr [eax + 0x310] // 50 | push eax // 8d45c4 | lea eax, [ebp - 0x3c] // 50 | push eax // e8???????? | $sequence_1 = { 8b4508 8b4034 83c001 0f80b9060000 8b4d08 894134 8b4508 } // n = 7, score = 100 // 8b4508 | mov eax, dword ptr [ebp + 8] // 8b4034 | mov eax, dword ptr [eax + 0x34] // 83c001 | add eax, 1 // 0f80b9060000 | jo 0x6bf // 8b4d08 | mov ecx, dword ptr [ebp + 8] // 894134 | mov dword ptr [ecx + 0x34], eax // 8b4508 | mov eax, dword ptr [ebp + 8] $sequence_2 = { 8b00 ff7508 ff902c070000 6683bd2cffffffff 0f85f7030000 8b4508 8b00 } // n = 7, score = 100 // 8b00 | mov eax, dword ptr [eax] // ff7508 | push dword ptr [ebp + 8] // ff902c070000 | call dword ptr [eax + 0x72c] // 6683bd2cffffffff | cmp word ptr [ebp - 0xd4], -1 // 0f85f7030000 | jne 0x3fd // 8b4508 | mov eax, dword ptr [ebp + 8] // 8b00 | mov eax, dword ptr [eax] $sequence_3 = { e8???????? 8945dc 8d45e0 50 8b450c 668b00 } // n = 6, score = 100 // e8???????? | // 8945dc | mov dword ptr [ebp - 0x24], eax // 8d45e0 | lea eax, [ebp - 0x20] // 50 | push eax // 8b450c | mov eax, dword ptr [ebp + 0xc] // 668b00 | mov ax, word ptr [eax] $sequence_4 = { 50 8b8554ffffff 8b00 ffb554ffffff ff5054 } // n = 5, score = 100 // 50 | push eax // 8b8554ffffff | mov eax, dword ptr [ebp - 0xac] // 8b00 | mov eax, dword ptr [eax] // ffb554ffffff | push dword ptr [ebp - 0xac] // ff5054 | call dword ptr [eax + 0x54] $sequence_5 = { 668985f0feffff 8d8568ffffff 50 8d8578ffffff 50 8d4598 50 } // n = 7, score = 100 // 668985f0feffff | mov word ptr [ebp - 0x110], ax // 8d8568ffffff | lea eax, [ebp - 0x98] // 50 | push eax // 8d8578ffffff | lea eax, [ebp - 0x88] // 50 | push eax // 8d4598 | lea eax, [ebp - 0x68] // 50 | push eax $sequence_6 = { 8d4588 50 8b856cffffff 8b00 ffb56cffffff ff90d8000000 } // n = 6, score = 100 // 8d4588 | lea eax, [ebp - 0x78] // 50 | push eax // 8b856cffffff | mov eax, dword ptr [ebp - 0x94] // 8b00 | mov eax, dword ptr [eax] // ffb56cffffff | push dword ptr [ebp - 0x94] // ff90d8000000 | call dword ptr [eax + 0xd8] $sequence_7 = { ffb5dcfeffff e8???????? 89852cfeffff eb07 83a52cfeffff00 8b45c0 } // n = 6, score = 100 // ffb5dcfeffff | push dword ptr [ebp - 0x124] // e8???????? | // 89852cfeffff | mov dword ptr [ebp - 0x1d4], eax // eb07 | jmp 9 // 83a52cfeffff00 | and dword ptr [ebp - 0x1d4], 0 // 8b45c0 | mov eax, dword ptr [ebp - 0x40] $sequence_8 = { 83658000 8d45dc 50 8d45d8 50 8d45e0 } // n = 6, score = 100 // 83658000 | and dword ptr [ebp - 0x80], 0 // 8d45dc | lea eax, [ebp - 0x24] // 50 | push eax // 8d45d8 | lea eax, [ebp - 0x28] // 50 | push eax // 8d45e0 | lea eax, [ebp - 0x20] $sequence_9 = { ff75d8 e8???????? dc9d68ffffff dfe0 } // n = 4, score = 100 // ff75d8 | push dword ptr [ebp - 0x28] // e8???????? | // dc9d68ffffff | fcomp qword ptr [ebp - 0x98] // dfe0 | fnstsw ax condition: 7 of them and filesize < 1024000 }
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