There is no description at this point.
rule win_dorkbot_ngrbot_auto { meta: author = "Felix Bilstein - yara-signator at cocacoding dot com" date = "2023-12-06" version = "1" description = "Detects win.dorkbot_ngrbot." 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.dorkbot_ngrbot" 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 = { 6a5c 56 e8???????? 8b5d0c 6a5c 53 8bf8 } // n = 7, score = 200 // 6a5c | push 0x5c // 56 | push esi // e8???????? | // 8b5d0c | mov ebx, dword ptr [ebp + 0xc] // 6a5c | push 0x5c // 53 | push ebx // 8bf8 | mov edi, eax $sequence_1 = { ffd6 33c0 a3???????? a3???????? a3???????? 8b45fc } // n = 6, score = 200 // ffd6 | call esi // 33c0 | xor eax, eax // a3???????? | // a3???????? | // a3???????? | // 8b45fc | mov eax, dword ptr [ebp - 4] $sequence_2 = { c1e704 8b8f84693a02 48 3bc8 0f8289000000 68???????? 8d45ec } // n = 7, score = 200 // c1e704 | shl edi, 4 // 8b8f84693a02 | mov ecx, dword ptr [edi + 0x23a6984] // 48 | dec eax // 3bc8 | cmp ecx, eax // 0f8289000000 | jb 0x8f // 68???????? | // 8d45ec | lea eax, [ebp - 0x14] $sequence_3 = { 3bc6 751a 8b00 898120100000 8b0a 8bb920100000 56 } // n = 7, score = 200 // 3bc6 | cmp eax, esi // 751a | jne 0x1c // 8b00 | mov eax, dword ptr [eax] // 898120100000 | mov dword ptr [ecx + 0x1020], eax // 8b0a | mov ecx, dword ptr [edx] // 8bb920100000 | mov edi, dword ptr [ecx + 0x1020] // 56 | push esi $sequence_4 = { 8b4508 50 8d8da4fdffff 51 68???????? 8d958cf7ffff 6817060000 } // n = 7, score = 200 // 8b4508 | mov eax, dword ptr [ebp + 8] // 50 | push eax // 8d8da4fdffff | lea ecx, [ebp - 0x25c] // 51 | push ecx // 68???????? | // 8d958cf7ffff | lea edx, [ebp - 0x874] // 6817060000 | push 0x617 $sequence_5 = { 8b15???????? 8b1d???????? 6a08 52 ffd3 6804010000 8906 } // n = 7, score = 200 // 8b15???????? | // 8b1d???????? | // 6a08 | push 8 // 52 | push edx // ffd3 | call ebx // 6804010000 | push 0x104 // 8906 | mov dword ptr [esi], eax $sequence_6 = { 0145fc ffd3 8bc8 b8d34d6210 f7e1 c1ea06 } // n = 6, score = 200 // 0145fc | add dword ptr [ebp - 4], eax // ffd3 | call ebx // 8bc8 | mov ecx, eax // b8d34d6210 | mov eax, 0x10624dd3 // f7e1 | mul ecx // c1ea06 | shr edx, 6 $sequence_7 = { 6689462d 83c007 66898638100000 5f 895628 c6462c03 b801000000 } // n = 7, score = 200 // 6689462d | mov word ptr [esi + 0x2d], ax // 83c007 | add eax, 7 // 66898638100000 | mov word ptr [esi + 0x1038], ax // 5f | pop edi // 895628 | mov dword ptr [esi + 0x28], edx // c6462c03 | mov byte ptr [esi + 0x2c], 3 // b801000000 | mov eax, 1 $sequence_8 = { 53 8d55d4 52 ffd6 85c0 7fdb 5f } // n = 7, score = 200 // 53 | push ebx // 8d55d4 | lea edx, [ebp - 0x2c] // 52 | push edx // ffd6 | call esi // 85c0 | test eax, eax // 7fdb | jg 0xffffffdd // 5f | pop edi $sequence_9 = { 0fb6c9 6880000000 83c202 52 8b5508 f7d9 1bc9 } // n = 7, score = 200 // 0fb6c9 | movzx ecx, cl // 6880000000 | push 0x80 // 83c202 | add edx, 2 // 52 | push edx // 8b5508 | mov edx, dword ptr [ebp + 8] // f7d9 | neg ecx // 1bc9 | sbb ecx, ecx condition: 7 of them and filesize < 638976 }
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