Actor(s): Thrip
There is no description at this point.
rule win_wmighost_auto { meta: author = "Felix Bilstein - yara-signator at cocacoding dot com" date = "2022-05-16" version = "1" description = "Detects win.wmighost." 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.wmighost" 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 = { 5d c3 55 8bec b9???????? ff15???????? } // n = 6, score = 100 // 5d | pop ebp // c3 | ret // 55 | push ebp // 8bec | mov ebp, esp // b9???????? | // ff15???????? | $sequence_1 = { 50 8d8df0fcffff 51 e8???????? 83c408 } // n = 5, score = 100 // 50 | push eax // 8d8df0fcffff | lea ecx, [ebp - 0x310] // 51 | push ecx // e8???????? | // 83c408 | add esp, 8 $sequence_2 = { 57 8d4510 898588aeffff 8b8d88aeffff 51 8b550c } // n = 6, score = 100 // 57 | push edi // 8d4510 | lea eax, [ebp + 0x10] // 898588aeffff | mov dword ptr [ebp - 0x5178], eax // 8b8d88aeffff | mov ecx, dword ptr [ebp - 0x5178] // 51 | push ecx // 8b550c | mov edx, dword ptr [ebp + 0xc] $sequence_3 = { d1e1 51 e8???????? 83c404 8945c8 8b55c8 } // n = 6, score = 100 // d1e1 | shl ecx, 1 // 51 | push ecx // e8???????? | // 83c404 | add esp, 4 // 8945c8 | mov dword ptr [ebp - 0x38], eax // 8b55c8 | mov edx, dword ptr [ebp - 0x38] $sequence_4 = { ff15???????? 8d958cfeffff 52 ff15???????? 66c7858cfeffffd607 } // n = 5, score = 100 // ff15???????? | // 8d958cfeffff | lea edx, [ebp - 0x174] // 52 | push edx // ff15???????? | // 66c7858cfeffffd607 | mov word ptr [ebp - 0x174], 0x7d6 $sequence_5 = { 837df000 7d12 68???????? 8b45e8 50 8b4df0 } // n = 6, score = 100 // 837df000 | cmp dword ptr [ebp - 0x10], 0 // 7d12 | jge 0x14 // 68???????? | // 8b45e8 | mov eax, dword ptr [ebp - 0x18] // 50 | push eax // 8b4df0 | mov ecx, dword ptr [ebp - 0x10] $sequence_6 = { 837dfcff 7505 e9???????? 6a02 } // n = 4, score = 100 // 837dfcff | cmp dword ptr [ebp - 4], -1 // 7505 | jne 7 // e9???????? | // 6a02 | push 2 $sequence_7 = { 8b45ec 50 8b4de4 51 6aff } // n = 5, score = 100 // 8b45ec | mov eax, dword ptr [ebp - 0x14] // 50 | push eax // 8b4de4 | mov ecx, dword ptr [ebp - 0x1c] // 51 | push ecx // 6aff | push -1 $sequence_8 = { ff5240 8945fc 837dfc00 7d12 68???????? 8b4df8 } // n = 6, score = 100 // ff5240 | call dword ptr [edx + 0x40] // 8945fc | mov dword ptr [ebp - 4], eax // 837dfc00 | cmp dword ptr [ebp - 4], 0 // 7d12 | jge 0x14 // 68???????? | // 8b4df8 | mov ecx, dword ptr [ebp - 8] $sequence_9 = { 85c9 0f849a000000 6a10 6a00 8d559c } // n = 5, score = 100 // 85c9 | test ecx, ecx // 0f849a000000 | je 0xa0 // 6a10 | push 0x10 // 6a00 | push 0 // 8d559c | lea edx, [ebp - 0x64] condition: 7 of them and filesize < 49152 }
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