Actor(s): Winnti Umbrella
There is no description at this point.
rule win_pipemon_auto { meta: author = "Felix Bilstein - yara-signator at cocacoding dot com" date = "2023-12-06" version = "1" description = "Detects win.pipemon." 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.pipemon" 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 = { 418bf8 4903fe 85db 0f84a1000000 6690 49634e3c } // n = 6, score = 100 // 418bf8 | dec eax // 4903fe | lea eax, [esp + 0x60] // 85db | dec eax // 0f84a1000000 | mov dword ptr [ebp + 0x1f8], eax // 6690 | mov edx, 1 // 49634e3c | dec eax $sequence_1 = { 7516 488d05bd360100 488b4c2430 483bc8 7405 e8???????? 488b05???????? } // n = 7, score = 100 // 7516 | add ebx, esp // 488d05bd360100 | call dword ptr [esp + 0x98] // 488b4c2430 | dec eax // 483bc8 | mov edx, dword ptr [esp + 0xa8] // 7405 | dec esp // e8???????? | // 488b05???????? | $sequence_2 = { 85c0 7427 488b4c2438 488d1526d90000 ff15???????? } // n = 5, score = 100 // 85c0 | lea edx, [0x1fe53] // 7427 | dec eax // 488b4c2438 | lea ecx, [esp + 0x40] // 488d1526d90000 | dec eax // ff15???????? | $sequence_3 = { b906000000 48898620020000 0fb7c0 66f3ab 488d3d2c3b0100 } // n = 5, score = 100 // b906000000 | cmp eax, dword ptr [ebx + 0x2c] // 48898620020000 | dec eax // 0fb7c0 | mov dword ptr [ebp - 0x29], esi // 66f3ab | mov byte ptr [ebp - 5], al // 488d3d2c3b0100 | movdqu xmmword ptr [ebp + 0x2f], xmm0 $sequence_4 = { 488d4c2438 e8???????? 4c8d4820 4889442420 4c8bc3 488d5590 488d4c2438 } // n = 7, score = 100 // 488d4c2438 | mov dword ptr [esp + 0x58], eax // e8???????? | // 4c8d4820 | dec esp // 4889442420 | lea eax, [esp + 0x58] // 4c8bc3 | dec eax // 488d5590 | lea ecx, [esp + 0x38] // 488d4c2438 | dec esp $sequence_5 = { 4881c458010000 c3 83f801 7529 b803000000 488b8c2440010000 4833cc } // n = 7, score = 100 // 4881c458010000 | dec eax // c3 | sub esp, 0xc0 // 83f801 | dec eax // 7529 | xor eax, esp // b803000000 | dec eax // 488b8c2440010000 | mov dword ptr [esp + 0xb0], eax // 4833cc | inc ecx $sequence_6 = { 458d4d02 458bc7 488d542450 488bc8 } // n = 4, score = 100 // 458d4d02 | dec eax // 458bc7 | lea edx, [0xa514] // 488d542450 | dec esp // 488bc8 | lea eax, [0xa511] $sequence_7 = { e8???????? 4881c498000000 c3 448b442430 488d1543fe0100 33c0 488d4c2440 } // n = 7, score = 100 // e8???????? | // 4881c498000000 | mov edx, edi // c3 | dec eax // 448b442430 | lea ecx, [0x16251] // 488d1543fe0100 | je 0x305 // 33c0 | dec eax // 488d4c2440 | mov ecx, dword ptr [edi + 0x90] $sequence_8 = { ffc8 3d03010000 7734 488d44244c 488bd7 } // n = 5, score = 100 // ffc8 | mov byte ptr [esp + 0x30], 0 // 3d03010000 | dec eax // 7734 | lea eax, [ebp + 0x670] // 488d44244c | dec eax // 488bd7 | mov ebx, eax $sequence_9 = { 80bd8008000000 0f84b6010000 4d85ed 0f84b6000000 } // n = 4, score = 100 // 80bd8008000000 | lea ecx, [ebp + 0x400] // 0f84b6010000 | dec eax // 4d85ed | mov ecx, ebx // 0f84b6000000 | dec eax condition: 7 of them and filesize < 389120 }
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