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rule win_pittytiger_rat_auto { meta: author = "Felix Bilstein - yara-signator at cocacoding dot com" date = "2026-09-17" version = "1" description = "Detects win.pittytiger_rat." 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.pittytiger_rat" 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 = { 8d8558fbffff 53 50 c745f401000080 c745fc02000080 895df8 } // n = 6, score = 100 // 8d8558fbffff | lea eax, [ebp - 0x4a8] // 53 | push ebx // 50 | push eax // c745f401000080 | mov dword ptr [ebp - 0xc], 0x80000001 // c745fc02000080 | mov dword ptr [ebp - 4], 0x80000002 // 895df8 | mov dword ptr [ebp - 8], ebx $sequence_1 = { ff15???????? 6a01 58 3945f8 } // n = 4, score = 100 // ff15???????? | // 6a01 | push 1 // 58 | pop eax // 3945f8 | cmp dword ptr [ebp - 8], eax $sequence_2 = { 8945fc 0f84fd010000 53 6a05 6a02 8d45f4 6a01 } // n = 7, score = 100 // 8945fc | mov dword ptr [ebp - 4], eax // 0f84fd010000 | je 0x203 // 53 | push ebx // 6a05 | push 5 // 6a02 | push 2 // 8d45f4 | lea eax, [ebp - 0xc] // 6a01 | push 1 $sequence_3 = { a3???????? 3bc3 7507 33c0 e9???????? 8d459c c745a465756545 } // n = 7, score = 100 // a3???????? | // 3bc3 | cmp eax, ebx // 7507 | jne 9 // 33c0 | xor eax, eax // e9???????? | // 8d459c | lea eax, [ebp - 0x64] // c745a465756545 | mov dword ptr [ebp - 0x5c], 0x45657565 $sequence_4 = { 50 53 ff75e8 897df0 } // n = 4, score = 100 // 50 | push eax // 53 | push ebx // ff75e8 | push dword ptr [ebp - 0x18] // 897df0 | mov dword ptr [ebp - 0x10], edi $sequence_5 = { 3bc3 a3???????? 0f84f2fdffff 8d45b8 c745c441786100 50 57 } // n = 7, score = 100 // 3bc3 | cmp eax, ebx // a3???????? | // 0f84f2fdffff | je 0xfffffdf8 // 8d45b8 | lea eax, [ebp - 0x48] // c745c441786100 | mov dword ptr [ebp - 0x3c], 0x617841 // 50 | push eax // 57 | push edi $sequence_6 = { 50 6a01 53 56 ff75f4 ff15???????? } // n = 6, score = 100 // 50 | push eax // 6a01 | push 1 // 53 | push ebx // 56 | push esi // ff75f4 | push dword ptr [ebp - 0xc] // ff15???????? | $sequence_7 = { eb05 68???????? 53 ff7508 e8???????? 83c40c 8d85f8fbffff } // n = 7, score = 100 // eb05 | jmp 7 // 68???????? | // 53 | push ebx // ff7508 | push dword ptr [ebp + 8] // e8???????? | // 83c40c | add esp, 0xc // 8d85f8fbffff | lea eax, [ebp - 0x408] $sequence_8 = { 8d45f0 50 8d45f8 50 8d45fc 6aff } // n = 6, score = 100 // 8d45f0 | lea eax, [ebp - 0x10] // 50 | push eax // 8d45f8 | lea eax, [ebp - 8] // 50 | push eax // 8d45fc | lea eax, [ebp - 4] // 6aff | push -1 $sequence_9 = { 53 68???????? e9???????? 8d4508 56 50 } // n = 6, score = 100 // 53 | push ebx // 68???????? | // e9???????? | // 8d4508 | lea eax, [ebp + 8] // 56 | push esi // 50 | push eax condition: 7 of them and filesize < 2162688 }
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