Actor(s): TA428
There is no description at this point.
rule win_cotx_auto { meta: author = "Felix Bilstein - yara-signator at cocacoding dot com" date = "2022-05-16" version = "1" description = "Detects win.cotx." 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.cotx" malpedia_rule_date = "20220513" malpedia_hash = "7f4b2229e6ae614d86d74917f6d5b41890e62a26" malpedia_version = "20220516" 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 = { c705????????a856701f c705????????597e743c c705????????c1e1039f c705????????0a9769e0 c705????????c4b85363 } // n = 5, score = 500 // c705????????a856701f | // c705????????597e743c | // c705????????c1e1039f | // c705????????0a9769e0 | // c705????????c4b85363 | $sequence_1 = { e8???????? 83ec20 8d8d00fcffff e8???????? } // n = 4, score = 500 // e8???????? | // 83ec20 | sub esp, 0x20 // 8d8d00fcffff | lea ecx, [ebp - 0x400] // e8???????? | $sequence_2 = { 8bd3 83e103 f3a4 8d8d98f6ffff e8???????? } // n = 5, score = 500 // 8bd3 | mov edx, ebx // 83e103 | and ecx, 3 // f3a4 | rep movsb byte ptr es:[edi], byte ptr [esi] // 8d8d98f6ffff | lea ecx, [ebp - 0x968] // e8???????? | $sequence_3 = { 68???????? 50 e8???????? 8d55a0 83c420 } // n = 5, score = 500 // 68???????? | // 50 | push eax // e8???????? | // 8d55a0 | lea edx, [ebp - 0x60] // 83c420 | add esp, 0x20 $sequence_4 = { 50 0fb745e6 50 0fb745e2 50 8d45a0 68???????? } // n = 7, score = 500 // 50 | push eax // 0fb745e6 | movzx eax, word ptr [ebp - 0x1a] // 50 | push eax // 0fb745e2 | movzx eax, word ptr [ebp - 0x1e] // 50 | push eax // 8d45a0 | lea eax, [ebp - 0x60] // 68???????? | $sequence_5 = { 0f1145e4 50 0f2805???????? 8d85bcfbffff } // n = 4, score = 500 // 0f1145e4 | movups xmmword ptr [ebp - 0x1c], xmm0 // 50 | push eax // 0f2805???????? | // 8d85bcfbffff | lea eax, [ebp - 0x444] $sequence_6 = { 42 84c0 75f9 8dbd98faffff } // n = 4, score = 500 // 42 | inc edx // 84c0 | test al, al // 75f9 | jne 0xfffffffb // 8dbd98faffff | lea edi, [ebp - 0x568] $sequence_7 = { 0f1185a8faffff e8???????? 83c40c 8d45a0 6a40 6a00 } // n = 6, score = 500 // 0f1185a8faffff | movups xmmword ptr [ebp - 0x558], xmm0 // e8???????? | // 83c40c | add esp, 0xc // 8d45a0 | lea eax, [ebp - 0x60] // 6a40 | push 0x40 // 6a00 | push 0 $sequence_8 = { 57 8bfa 8bf1 e8???????? 56 } // n = 5, score = 500 // 57 | push edi // 8bfa | mov edi, edx // 8bf1 | mov esi, ecx // e8???????? | // 56 | push esi $sequence_9 = { c705????????d468bcb5 c705????????a1a14538 c705????????2086e659 c705????????eec45abf } // n = 4, score = 500 // c705????????d468bcb5 | // c705????????a1a14538 | // c705????????2086e659 | // c705????????eec45abf | condition: 7 of them and filesize < 1171456 }
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