Actor(s): Comment Crew
There is no description at this point.
rule win_webc2_kt3_auto { meta: author = "Felix Bilstein - yara-signator at cocacoding dot com" date = "2020-12-22" version = "1" description = "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.webc2_kt3" malpedia_rule_date = "20201222" malpedia_hash = "30354d830a29f0fbd3714d93d94dea941d77a130" malpedia_version = "20201023" 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 = { 52 8b45e8 50 8b4df0 51 8b55f4 52 } // n = 7, score = 100 // 52 | push edx // 8b45e8 | mov eax, dword ptr [ebp - 0x18] // 50 | push eax // 8b4df0 | mov ecx, dword ptr [ebp - 0x10] // 51 | push ecx // 8b55f4 | mov edx, dword ptr [ebp - 0xc] // 52 | push edx $sequence_1 = { 8b95a4feffff 2b95a0feffff 52 8b85a0feffff 83c001 50 8d8decfeffff } // n = 7, score = 100 // 8b95a4feffff | mov edx, dword ptr [ebp - 0x15c] // 2b95a0feffff | sub edx, dword ptr [ebp - 0x160] // 52 | push edx // 8b85a0feffff | mov eax, dword ptr [ebp - 0x160] // 83c001 | add eax, 1 // 50 | push eax // 8d8decfeffff | lea ecx, [ebp - 0x114] $sequence_2 = { c705????????ac3a4000 a3???????? c3 8b4c240c 57 85c9 } // n = 6, score = 100 // c705????????ac3a4000 | // a3???????? | // c3 | ret // 8b4c240c | mov ecx, dword ptr [esp + 0xc] // 57 | push edi // 85c9 | test ecx, ecx $sequence_3 = { 51 e8???????? 83c404 eb07 33c0 e9???????? } // n = 6, score = 100 // 51 | push ecx // e8???????? | // 83c404 | add esp, 4 // eb07 | jmp 9 // 33c0 | xor eax, eax // e9???????? | $sequence_4 = { 0fbe11 83fa64 7536 8b4508 c70002000000 } // n = 5, score = 100 // 0fbe11 | movsx edx, byte ptr [ecx] // 83fa64 | cmp edx, 0x64 // 7536 | jne 0x38 // 8b4508 | mov eax, dword ptr [ebp + 8] // c70002000000 | mov dword ptr [eax], 2 $sequence_5 = { 7527 8b55fc 0fbe4202 83f82d } // n = 4, score = 100 // 7527 | jne 0x29 // 8b55fc | mov edx, dword ptr [ebp - 4] // 0fbe4202 | movsx eax, byte ptr [edx + 2] // 83f82d | cmp eax, 0x2d $sequence_6 = { 5b 7403 80cc10 c3 55 8bec 8b5510 } // n = 7, score = 100 // 5b | pop ebx // 7403 | je 5 // 80cc10 | or ah, 0x10 // c3 | ret // 55 | push ebp // 8bec | mov ebp, esp // 8b5510 | mov edx, dword ptr [ebp + 0x10] $sequence_7 = { 50 8b8de8fbffff 8b510c 52 e8???????? 8985e4fbffff 83bde4fbffffff } // n = 7, score = 100 // 50 | push eax // 8b8de8fbffff | mov ecx, dword ptr [ebp - 0x418] // 8b510c | mov edx, dword ptr [ecx + 0xc] // 52 | push edx // e8???????? | // 8985e4fbffff | mov dword ptr [ebp - 0x41c], eax // 83bde4fbffffff | cmp dword ptr [ebp - 0x41c], -1 $sequence_8 = { 837a0400 740d 8b45e8 8b4804 51 ff15???????? 0f8207000000 } // n = 7, score = 100 // 837a0400 | cmp dword ptr [edx + 4], 0 // 740d | je 0xf // 8b45e8 | mov eax, dword ptr [ebp - 0x18] // 8b4804 | mov ecx, dword ptr [eax + 4] // 51 | push ecx // ff15???????? | // 0f8207000000 | jb 0xd $sequence_9 = { 68???????? 50 e8???????? ffb6fcc74000 8d8560ffffff 50 } // n = 6, score = 100 // 68???????? | // 50 | push eax // e8???????? | // ffb6fcc74000 | push dword ptr [esi + 0x40c7fc] // 8d8560ffffff | lea eax, [ebp - 0xa0] // 50 | push eax condition: 7 of them and filesize < 114688 }
If your designated proposal does not fit in any other category, feel free to write a free-text in the comment field below.
Please propose all changes regarding references on the Malpedia library page
Your suggestion will be reviewed before being published. Thank you for contributing!
YYYY-MM-DD
YYYY-MM
YYYY