There is no description at this point.
rule win_kegotip_auto { meta: author = "Felix Bilstein - yara-signator at cocacoding dot com" date = "2023-12-06" version = "1" description = "Detects win.kegotip." 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.kegotip" 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 = { eb6d e9???????? eb63 c745f400000000 } // n = 4, score = 600 // eb6d | jmp 0x6f // e9???????? | // eb63 | jmp 0x65 // c745f400000000 | mov dword ptr [ebp - 0xc], 0 $sequence_1 = { e8???????? 83c40c c705????????94000000 68???????? } // n = 4, score = 600 // e8???????? | // 83c40c | add esp, 0xc // c705????????94000000 | // 68???????? | $sequence_2 = { 83c201 8955ec 8b45f8 83c004 8945f8 } // n = 5, score = 600 // 83c201 | add edx, 1 // 8955ec | mov dword ptr [ebp - 0x14], edx // 8b45f8 | mov eax, dword ptr [ebp - 8] // 83c004 | add eax, 4 // 8945f8 | mov dword ptr [ebp - 8], eax $sequence_3 = { 89420c 8b4dfc c7412400000000 8b55fc a1???????? 894210 6a10 } // n = 7, score = 600 // 89420c | mov dword ptr [edx + 0xc], eax // 8b4dfc | mov ecx, dword ptr [ebp - 4] // c7412400000000 | mov dword ptr [ecx + 0x24], 0 // 8b55fc | mov edx, dword ptr [ebp - 4] // a1???????? | // 894210 | mov dword ptr [edx + 0x10], eax // 6a10 | push 0x10 $sequence_4 = { 8b55f8 83c201 8955f8 ebe0 8b45f8 0fbe08 } // n = 6, score = 600 // 8b55f8 | mov edx, dword ptr [ebp - 8] // 83c201 | add edx, 1 // 8955f8 | mov dword ptr [ebp - 8], edx // ebe0 | jmp 0xffffffe2 // 8b45f8 | mov eax, dword ptr [ebp - 8] // 0fbe08 | movsx ecx, byte ptr [eax] $sequence_5 = { 6800100000 6800000800 6a00 ff15???????? 8945fc 837dfc00 7504 } // n = 7, score = 600 // 6800100000 | push 0x1000 // 6800000800 | push 0x80000 // 6a00 | push 0 // ff15???????? | // 8945fc | mov dword ptr [ebp - 4], eax // 837dfc00 | cmp dword ptr [ebp - 4], 0 // 7504 | jne 6 $sequence_6 = { 0f8592000000 8b4508 0345e8 0fb648ff 51 } // n = 5, score = 600 // 0f8592000000 | jne 0x98 // 8b4508 | mov eax, dword ptr [ebp + 8] // 0345e8 | add eax, dword ptr [ebp - 0x18] // 0fb648ff | movzx ecx, byte ptr [eax - 1] // 51 | push ecx $sequence_7 = { 52 8b4508 50 8d4df4 51 6a00 68???????? } // n = 7, score = 600 // 52 | push edx // 8b4508 | mov eax, dword ptr [ebp + 8] // 50 | push eax // 8d4df4 | lea ecx, [ebp - 0xc] // 51 | push ecx // 6a00 | push 0 // 68???????? | $sequence_8 = { 8b85fcfdffff 0fbe8c0500feffff 83f97a 7f1e 8b95fcfdffff 0fbe841500feffff 83e820 } // n = 7, score = 600 // 8b85fcfdffff | mov eax, dword ptr [ebp - 0x204] // 0fbe8c0500feffff | movsx ecx, byte ptr [ebp + eax - 0x200] // 83f97a | cmp ecx, 0x7a // 7f1e | jg 0x20 // 8b95fcfdffff | mov edx, dword ptr [ebp - 0x204] // 0fbe841500feffff | movsx eax, byte ptr [ebp + edx - 0x200] // 83e820 | sub eax, 0x20 $sequence_9 = { 8d85b0feffff 50 6a00 8d8dd8feffff 51 ff15???????? } // n = 6, score = 600 // 8d85b0feffff | lea eax, [ebp - 0x150] // 50 | push eax // 6a00 | push 0 // 8d8dd8feffff | lea ecx, [ebp - 0x128] // 51 | push ecx // ff15???????? | condition: 7 of them and filesize < 278528 }
If your designated proposal does not fit in any other category, feel free to write a free-text in the comment field below. Changes regarding references should be proposed on the Malpedia library page.
Your suggestion will be reviewed before being published. Thank you for contributing!
YYYY-MM-DD
YYYY-MM
YYYY