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 = "2023-07-11" 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 = "20230705" malpedia_hash = "42d0574f4405bd7d2b154d321d345acb18834a41" malpedia_version = "20230715" 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 = { 50 ff15???????? 83c438 68???????? ff15???????? 8b400c 8b08 } // n = 7, score = 300 // 50 | push eax // ff15???????? | // 83c438 | add esp, 0x38 // 68???????? | // ff15???????? | // 8b400c | mov eax, dword ptr [eax + 0xc] // 8b08 | mov ecx, dword ptr [eax] $sequence_1 = { c1e902 f3a5 8bc8 83e103 8d853c010000 f3a4 } // n = 6, score = 300 // c1e902 | shr ecx, 2 // f3a5 | rep movsd dword ptr es:[edi], dword ptr [esi] // 8bc8 | mov ecx, eax // 83e103 | and ecx, 3 // 8d853c010000 | lea eax, [ebp + 0x13c] // f3a4 | rep movsb byte ptr es:[edi], byte ptr [esi] $sequence_2 = { 85c0 740a b001 5e } // n = 4, score = 300 // 85c0 | test eax, eax // 740a | je 0xc // b001 | mov al, 1 // 5e | pop esi $sequence_3 = { 6a00 8d542404 51 52 ffd0 8b4c2400 33c0 } // n = 7, score = 300 // 6a00 | push 0 // 8d542404 | lea edx, [esp + 4] // 51 | push ecx // 52 | push edx // ffd0 | call eax // 8b4c2400 | mov ecx, dword ptr [esp] // 33c0 | xor eax, eax $sequence_4 = { 50 8d853c010000 50 8b8538010000 6a5a 52 50 } // n = 7, 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 // 50 | push eax $sequence_5 = { 41 3bc8 7cf3 5b } // n = 4, score = 300 // 41 | inc ecx // 3bc8 | cmp ecx, eax // 7cf3 | jl 0xfffffff5 // 5b | pop ebx $sequence_6 = { 68???????? c744240400000000 c744240800000000 ff15???????? 85c0 741a 68???????? } // n = 7, score = 300 // 68???????? | // c744240400000000 | mov dword ptr [esp + 4], 0 // c744240800000000 | mov dword ptr [esp + 8], 0 // ff15???????? | // 85c0 | test eax, eax // 741a | je 0x1c // 68???????? | $sequence_7 = { e9???????? 8bcd e8???????? b916000000 33c0 } // n = 5, score = 300 // e9???????? | // 8bcd | mov ecx, ebp // e8???????? | // b916000000 | mov ecx, 0x16 // 33c0 | xor eax, eax $sequence_8 = { f3a4 8b8d4c010000 83c25a 51 50 } // n = 5, score = 300 // f3a4 | rep movsb byte ptr es:[edi], byte ptr [esi] // 8b8d4c010000 | mov ecx, dword ptr [ebp + 0x14c] // 83c25a | add edx, 0x5a // 51 | push ecx // 50 | push eax $sequence_9 = { 8d542404 51 52 ffd0 8b4c2400 } // n = 5, score = 300 // 8d542404 | lea edx, [esp + 4] // 51 | push ecx // 52 | push edx // ffd0 | call eax // 8b4c2400 | mov ecx, dword ptr [esp] condition: 7 of them and filesize < 73728 }
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