rule win_maze_auto { meta: author = "Felix Bilstein - yara-signator at cocacoding dot com" date = "2026-09-17" version = "1" description = "Detects win.maze." 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.maze" malpedia_rule_date = "20260916" malpedia_hash = "53a643781c18e08f4a50949af60172d837a0b6f6" malpedia_version = "20260917" 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 = { c745f000000000 8b45f0 83c410 5e } // n = 4, score = 2400 // c745f000000000 | mov dword ptr [ebp - 0x10], 0 // 8b45f0 | mov eax, dword ptr [ebp - 0x10] // 83c410 | add esp, 0x10 // 5e | pop esi $sequence_1 = { 7509 c745f000000000 eb17 60 8b7d08 8b4d10 8b450c } // n = 7, score = 2400 // 7509 | jne 0xb // c745f000000000 | mov dword ptr [ebp - 0x10], 0 // eb17 | jmp 0x19 // 60 | pushal // 8b7d08 | mov edi, dword ptr [ebp + 8] // 8b4d10 | mov ecx, dword ptr [ebp + 0x10] // 8b450c | mov eax, dword ptr [ebp + 0xc] $sequence_2 = { 8b4d0c 8b5508 837d0800 8945ec } // n = 4, score = 2400 // 8b4d0c | mov ecx, dword ptr [ebp + 0xc] // 8b5508 | mov edx, dword ptr [ebp + 8] // 837d0800 | cmp dword ptr [ebp + 8], 0 // 8945ec | mov dword ptr [ebp - 0x14], eax $sequence_3 = { 894de8 8955e4 7509 c745f000000000 } // n = 4, score = 2400 // 894de8 | mov dword ptr [ebp - 0x18], ecx // 8955e4 | mov dword ptr [ebp - 0x1c], edx // 7509 | jne 0xb // c745f000000000 | mov dword ptr [ebp - 0x10], 0 $sequence_4 = { 53 57 56 83ec10 8b4510 8b4d0c 8b5508 } // n = 7, score = 2400 // 53 | push ebx // 57 | push edi // 56 | push esi // 83ec10 | sub esp, 0x10 // 8b4510 | mov eax, dword ptr [ebp + 0x10] // 8b4d0c | mov ecx, dword ptr [ebp + 0xc] // 8b5508 | mov edx, dword ptr [ebp + 8] $sequence_5 = { 8b4d10 8b450c f3aa 61 8945f0 c745f000000000 8b45f0 } // n = 7, score = 2400 // 8b4d10 | mov ecx, dword ptr [ebp + 0x10] // 8b450c | mov eax, dword ptr [ebp + 0xc] // f3aa | rep stosb byte ptr es:[edi], al // 61 | popal // 8945f0 | mov dword ptr [ebp - 0x10], eax // c745f000000000 | mov dword ptr [ebp - 0x10], 0 // 8b45f0 | mov eax, dword ptr [ebp - 0x10] $sequence_6 = { 837d0800 8945ec 894de8 8955e4 } // n = 4, score = 2400 // 837d0800 | cmp dword ptr [ebp + 8], 0 // 8945ec | mov dword ptr [ebp - 0x14], eax // 894de8 | mov dword ptr [ebp - 0x18], ecx // 8955e4 | mov dword ptr [ebp - 0x1c], edx $sequence_7 = { 898424fc000000 8b442430 89942400010000 f7642404 } // n = 4, score = 2300 // 898424fc000000 | mov dword ptr [esp + 0xfc], eax // 8b442430 | mov eax, dword ptr [esp + 0x30] // 89942400010000 | mov dword ptr [esp + 0x100], edx // f7642404 | mul dword ptr [esp + 4] $sequence_8 = { 41 41 41 41 41 } // n = 5, score = 1600 // 41 | inc ecx // 41 | inc ecx // 41 | inc ecx // 41 | inc ecx // 41 | inc ecx $sequence_9 = { 6bc20a 8b4d08 8b940100100000 c1ea10 88956effffff } // n = 5, score = 100 // 6bc20a | imul eax, edx, 0xa // 8b4d08 | mov ecx, dword ptr [ebp + 8] // 8b940100100000 | mov edx, dword ptr [ecx + eax + 0x1000] // c1ea10 | shr edx, 0x10 // 88956effffff | mov byte ptr [ebp - 0x92], dl $sequence_10 = { 8b4d08 8b940100100000 c1e216 b804000000 6bc800 } // n = 5, score = 100 // 8b4d08 | mov ecx, dword ptr [ebp + 8] // 8b940100100000 | mov edx, dword ptr [ecx + eax + 0x1000] // c1e216 | shl edx, 0x16 // b804000000 | mov eax, 4 // 6bc800 | imul ecx, eax, 0 $sequence_11 = { 038c9000040000 898d58feffff 8b4dfc 8b5508 8b848a14080000 } // n = 5, score = 100 // 038c9000040000 | add ecx, dword ptr [eax + edx*4 + 0x400] // 898d58feffff | mov dword ptr [ebp - 0x1a8], ecx // 8b4dfc | mov ecx, dword ptr [ebp - 4] // 8b5508 | mov edx, dword ptr [ebp + 8] // 8b848a14080000 | mov eax, dword ptr [edx + ecx*4 + 0x814] $sequence_12 = { d1e2 8b4508 8b941040100000 c1ea18 0bca 898dbcfdffff } // n = 6, score = 100 // d1e2 | shl edx, 1 // 8b4508 | mov eax, dword ptr [ebp + 8] // 8b941040100000 | mov edx, dword ptr [eax + edx + 0x1040] // c1ea18 | shr edx, 0x18 // 0bca | or ecx, edx // 898dbcfdffff | mov dword ptr [ebp - 0x244], ecx $sequence_13 = { c1e117 8b55fc 8b4508 8b949038080000 c1ea09 } // n = 5, score = 100 // c1e117 | shl ecx, 0x17 // 8b55fc | mov edx, dword ptr [ebp - 4] // 8b4508 | mov eax, dword ptr [ebp + 8] // 8b949038080000 | mov edx, dword ptr [eax + edx*4 + 0x838] // c1ea09 | shr edx, 9 $sequence_14 = { 0bd0 8955a4 b904000000 c1e100 8b5508 8b840a00100000 c1e016 } // n = 7, score = 100 // 0bd0 | or edx, eax // 8955a4 | mov dword ptr [ebp - 0x5c], edx // b904000000 | mov ecx, 4 // c1e100 | shl ecx, 0 // 8b5508 | mov edx, dword ptr [ebp + 8] // 8b840a00100000 | mov eax, dword ptr [edx + ecx + 0x1000] // c1e016 | shl eax, 0x16 $sequence_15 = { 8b8c8800080000 8b4508 038c90000c0000 894dd4 } // n = 4, score = 100 // 8b8c8800080000 | mov ecx, dword ptr [eax + ecx*4 + 0x800] // 8b4508 | mov eax, dword ptr [ebp + 8] // 038c90000c0000 | add ecx, dword ptr [eax + edx*4 + 0xc00] // 894dd4 | mov dword ptr [ebp - 0x2c], ecx $sequence_16 = { 6bc20b 8b5508 8b840240100000 c1e816 0bc8 898d98fdffff } // n = 6, score = 100 // 6bc20b | imul eax, edx, 0xb // 8b5508 | mov edx, dword ptr [ebp + 8] // 8b840240100000 | mov eax, dword ptr [edx + eax + 0x1040] // c1e816 | shr eax, 0x16 // 0bc8 | or ecx, eax // 898d98fdffff | mov dword ptr [ebp - 0x268], ecx condition: 7 of them and filesize < 2318336 }