There is no description at this point.
rule win_troldesh_auto { meta: author = "Felix Bilstein - yara-signator at cocacoding dot com" date = "2022-08-05" version = "1" description = "Detects win.troldesh." 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.troldesh" malpedia_rule_date = "20220805" malpedia_hash = "6ec06c64bcfdbeda64eff021c766b4ce34542b71" malpedia_version = "20220808" 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 = { e8???????? 55 8bf0 e8???????? 83c428 85f6 742e } // n = 7, score = 600 // e8???????? | // 55 | push ebp // 8bf0 | mov esi, eax // e8???????? | // 83c428 | add esp, 0x28 // 85f6 | test esi, esi // 742e | je 0x30 $sequence_1 = { ff7508 e8???????? 59 33f6 3975f4 7409 ff75f4 } // n = 7, score = 600 // ff7508 | push dword ptr [ebp + 8] // e8???????? | // 59 | pop ecx // 33f6 | xor esi, esi // 3975f4 | cmp dword ptr [ebp - 0xc], esi // 7409 | je 0xb // ff75f4 | push dword ptr [ebp - 0xc] $sequence_2 = { f6400808 893d???????? 893d???????? 7509 f6839000000020 740a 57 } // n = 7, score = 600 // f6400808 | test byte ptr [eax + 8], 8 // 893d???????? | // 893d???????? | // 7509 | jne 0xb // f6839000000020 | test byte ptr [ebx + 0x90], 0x20 // 740a | je 0xc // 57 | push edi $sequence_3 = { e8???????? 8b4df8 c70424???????? e8???????? 33c0 eb82 55 } // n = 7, score = 600 // e8???????? | // 8b4df8 | mov ecx, dword ptr [ebp - 8] // c70424???????? | // e8???????? | // 33c0 | xor eax, eax // eb82 | jmp 0xffffff84 // 55 | push ebp $sequence_4 = { ff7508 8365f800 8945f0 8d45bc 8d75ec c745ec18000000 8945f4 } // n = 7, score = 600 // ff7508 | push dword ptr [ebp + 8] // 8365f800 | and dword ptr [ebp - 8], 0 // 8945f0 | mov dword ptr [ebp - 0x10], eax // 8d45bc | lea eax, [ebp - 0x44] // 8d75ec | lea esi, [ebp - 0x14] // c745ec18000000 | mov dword ptr [ebp - 0x14], 0x18 // 8945f4 | mov dword ptr [ebp - 0xc], eax $sequence_5 = { eb18 53 6a01 ffb608020000 68???????? 6a00 e8???????? } // n = 7, score = 600 // eb18 | jmp 0x1a // 53 | push ebx // 6a01 | push 1 // ffb608020000 | push dword ptr [esi + 0x208] // 68???????? | // 6a00 | push 0 // e8???????? | $sequence_6 = { ff7518 8b550c ff75fc 8b4d08 ff7514 e8???????? eb4f } // n = 7, score = 600 // ff7518 | push dword ptr [ebp + 0x18] // 8b550c | mov edx, dword ptr [ebp + 0xc] // ff75fc | push dword ptr [ebp - 4] // 8b4d08 | mov ecx, dword ptr [ebp + 8] // ff7514 | push dword ptr [ebp + 0x14] // e8???????? | // eb4f | jmp 0x51 $sequence_7 = { e8???????? 8bf8 838f8000000002 59 897c2410 e8???????? 8b7020 } // n = 7, score = 600 // e8???????? | // 8bf8 | mov edi, eax // 838f8000000002 | or dword ptr [edi + 0x80], 2 // 59 | pop ecx // 897c2410 | mov dword ptr [esp + 0x10], edi // e8???????? | // 8b7020 | mov esi, dword ptr [eax + 0x20] $sequence_8 = { e8???????? 83c8ff e9???????? 8bf3 e8???????? 898394000000 8b45fc } // n = 7, score = 600 // e8???????? | // 83c8ff | or eax, 0xffffffff // e9???????? | // 8bf3 | mov esi, ebx // e8???????? | // 898394000000 | mov dword ptr [ebx + 0x94], eax // 8b45fc | mov eax, dword ptr [ebp - 4] $sequence_9 = { 8d442414 50 57 8d4c2424 e8???????? 59 59 } // n = 7, score = 600 // 8d442414 | lea eax, [esp + 0x14] // 50 | push eax // 57 | push edi // 8d4c2424 | lea ecx, [esp + 0x24] // e8???????? | // 59 | pop ecx // 59 | pop ecx condition: 7 of them and filesize < 3915776 }
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