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 = "2023-01-25" 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 = "20230124" malpedia_hash = "2ee0eebba83dce3d019a90519f2f972c0fcf9686" malpedia_version = "20230125" 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 = { a4 83c9ff 8bfb f2ae } // n = 4, score = 300 // a4 | movsb byte ptr es:[edi], byte ptr [esi] // 83c9ff | or ecx, 0xffffffff // 8bfb | mov edi, ebx // f2ae | repne scasb al, byte ptr es:[edi] $sequence_1 = { 68???????? ff15???????? 8b400c 8b08 } // n = 4, score = 300 // 68???????? | // ff15???????? | // 8b400c | mov eax, dword ptr [eax + 0xc] // 8b08 | mov ecx, dword ptr [eax] $sequence_2 = { 8b742410 f7f9 8b4c240c b801000000 80c20a 3bf0 } // n = 6, score = 300 // 8b742410 | mov esi, dword ptr [esp + 0x10] // f7f9 | idiv ecx // 8b4c240c | mov ecx, dword ptr [esp + 0xc] // b801000000 | mov eax, 1 // 80c20a | add dl, 0xa // 3bf0 | cmp esi, eax $sequence_3 = { 51 8b4c241c 51 ff15???????? } // n = 4, score = 300 // 51 | push ecx // 8b4c241c | mov ecx, dword ptr [esp + 0x1c] // 51 | push ecx // ff15???????? | $sequence_4 = { 881c31 41 3bc8 7cf3 5b } // n = 5, score = 300 // 881c31 | mov byte ptr [ecx + esi], bl // 41 | inc ecx // 3bc8 | cmp ecx, eax // 7cf3 | jl 0xfffffff5 // 5b | pop ebx $sequence_5 = { 99 b932000000 8b742410 f7f9 8b4c240c b801000000 } // n = 6, score = 300 // 99 | cdq // b932000000 | mov ecx, 0x32 // 8b742410 | mov esi, dword ptr [esp + 0x10] // f7f9 | idiv ecx // 8b4c240c | mov ecx, dword ptr [esp + 0xc] // b801000000 | mov eax, 1 $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 = { 50 8bf1 6802020000 ff15???????? 85c0 740a } // n = 6, score = 300 // 50 | push eax // 8bf1 | mov esi, ecx // 6802020000 | push 0x202 // ff15???????? | // 85c0 | test eax, eax // 740a | je 0xc $sequence_8 = { 8b442414 8b4c2410 8b54240c 56 8b74240c 50 } // n = 6, score = 300 // 8b442414 | mov eax, dword ptr [esp + 0x14] // 8b4c2410 | mov ecx, dword ptr [esp + 0x10] // 8b54240c | mov edx, dword ptr [esp + 0xc] // 56 | push esi // 8b74240c | mov esi, dword ptr [esp + 0xc] // 50 | push eax $sequence_9 = { 6a5a 52 50 e8???????? 83c414 } // n = 5, score = 300 // 6a5a | push 0x5a // 52 | push edx // 50 | push eax // e8???????? | // 83c414 | add esp, 0x14 condition: 7 of them and filesize < 73728 }
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