Actor(s): RANCOR
There is no description at this point.
rule win_plaintee_auto { meta: author = "Felix Bilstein - yara-signator at cocacoding dot com" date = "2023-12-06" version = "1" description = "Detects win.plaintee." 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.plaintee" malpedia_rule_date = "20231130" malpedia_hash = "fc8a0e9f343f6d6ded9e7df1a64dac0cc68d7351" malpedia_version = "20230808" 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 = { 8d4c2404 6a00 8d542404 51 52 ffd0 8b4c2400 } // n = 7, score = 300 // 8d4c2404 | lea ecx, [esp + 4] // 6a00 | push 0 // 8d542404 | lea edx, [esp + 4] // 51 | push ecx // 52 | push edx // ffd0 | call eax // 8b4c2400 | mov ecx, dword ptr [esp] $sequence_1 = { 8bf1 6802020000 ff15???????? 85c0 740a b001 } // n = 6, score = 300 // 8bf1 | mov esi, ecx // 6802020000 | push 0x202 // ff15???????? | // 85c0 | test eax, eax // 740a | je 0xc // b001 | mov al, 1 $sequence_2 = { 50 8d853c010000 50 8b8538010000 6a5a 52 } // n = 6, score = 300 // 50 | push eax // 8d853c010000 | lea eax, [ebp + 0x13c] // 50 | push eax // 8b8538010000 | mov eax, dword ptr [ebp + 0x138] // 6a5a | push 0x5a // 52 | push edx $sequence_3 = { 8d442400 56 50 8bf1 6802020000 ff15???????? } // n = 6, score = 300 // 8d442400 | lea eax, [esp] // 56 | push esi // 50 | push eax // 8bf1 | mov esi, ecx // 6802020000 | push 0x202 // ff15???????? | $sequence_4 = { 5e 81c490010000 c3 8bce } // n = 4, score = 300 // 5e | pop esi // 81c490010000 | add esp, 0x190 // c3 | ret // 8bce | mov ecx, esi $sequence_5 = { 85f6 74c6 8bce e8???????? } // n = 4, score = 300 // 85f6 | test esi, esi // 74c6 | je 0xffffffc8 // 8bce | mov ecx, esi // e8???????? | $sequence_6 = { f3ab 66ab b900010000 33c0 } // n = 4, score = 300 // f3ab | rep stosd dword ptr es:[edi], eax // 66ab | stosw word ptr es:[edi], ax // b900010000 | mov ecx, 0x100 // 33c0 | xor eax, eax $sequence_7 = { eb02 33f6 8bce e8???????? 8a8669010000 } // n = 5, score = 300 // eb02 | jmp 4 // 33f6 | xor esi, esi // 8bce | mov ecx, esi // e8???????? | // 8a8669010000 | mov al, byte ptr [esi + 0x169] $sequence_8 = { 68ac010000 e8???????? 83c404 85c0 7412 } // n = 5, score = 300 // 68ac010000 | push 0x1ac // e8???????? | // 83c404 | add esp, 4 // 85c0 | test eax, eax // 7412 | je 0x14 $sequence_9 = { 750a b001 5e 81c490010000 c3 } // n = 5, score = 300 // 750a | jne 0xc // b001 | mov al, 1 // 5e | pop esi // 81c490010000 | add esp, 0x190 // c3 | ret condition: 7 of them and filesize < 73728 }
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