Actor(s): Tick
There is no description at this point.
rule win_datper_auto { meta: author = "Felix Bilstein - yara-signator at cocacoding dot com" date = "2024-10-31" version = "1" description = "Detects win.datper." 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.datper" malpedia_rule_date = "20241030" malpedia_hash = "26e26953c49c8efafbf72a38076855d578e0a2e4" malpedia_version = "20241030" 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 = { 8b45a0 50 8b45a8 50 e8???????? } // n = 5, score = 200 // 8b45a0 | mov eax, dword ptr [ebp - 0x60] // 50 | push eax // 8b45a8 | mov eax, dword ptr [ebp - 0x58] // 50 | push eax // e8???????? | $sequence_1 = { 56 53 e8???????? a3???????? 8d95d8fbffff b8???????? e8???????? } // n = 7, score = 200 // 56 | push esi // 53 | push ebx // e8???????? | // a3???????? | // 8d95d8fbffff | lea edx, [ebp - 0x428] // b8???????? | // e8???????? | $sequence_2 = { 8b4514 50 68???????? 53 } // n = 4, score = 200 // 8b4514 | mov eax, dword ptr [ebp + 0x14] // 50 | push eax // 68???????? | // 53 | push ebx $sequence_3 = { e8???????? 8bf8 8b8574d7ffff a3???????? 68e8030000 e8???????? 8d45e4 } // n = 7, score = 200 // e8???????? | // 8bf8 | mov edi, eax // 8b8574d7ffff | mov eax, dword ptr [ebp - 0x288c] // a3???????? | // 68e8030000 | push 0x3e8 // e8???????? | // 8d45e4 | lea eax, [ebp - 0x1c] $sequence_4 = { d1e8 8bf0 8d45e8 50 8bce 8bd3 } // n = 6, score = 200 // d1e8 | shr eax, 1 // 8bf0 | mov esi, eax // 8d45e8 | lea eax, [ebp - 0x18] // 50 | push eax // 8bce | mov ecx, esi // 8bd3 | mov edx, ebx $sequence_5 = { ba???????? 8b45fc e8???????? 8b95ecf9ffff b8???????? e8???????? 8d85e8f9ffff } // n = 7, score = 200 // ba???????? | // 8b45fc | mov eax, dword ptr [ebp - 4] // e8???????? | // 8b95ecf9ffff | mov edx, dword ptr [ebp - 0x614] // b8???????? | // e8???????? | // 8d85e8f9ffff | lea eax, [ebp - 0x618] $sequence_6 = { 55 68???????? 64ff30 648920 8d8578ffffff 50 e8???????? } // n = 7, score = 200 // 55 | push ebp // 68???????? | // 64ff30 | push dword ptr fs:[eax] // 648920 | mov dword ptr fs:[eax], esp // 8d8578ffffff | lea eax, [ebp - 0x88] // 50 | push eax // e8???????? | $sequence_7 = { 75cd 8b45f8 5f 5e 5b } // n = 5, score = 200 // 75cd | jne 0xffffffcf // 8b45f8 | mov eax, dword ptr [ebp - 8] // 5f | pop edi // 5e | pop esi // 5b | pop ebx $sequence_8 = { 83c604 4b 75ed bb02000000 8bf7 83c8ff e8???????? } // n = 7, score = 200 // 83c604 | add esi, 4 // 4b | dec ebx // 75ed | jne 0xffffffef // bb02000000 | mov ebx, 2 // 8bf7 | mov esi, edi // 83c8ff | or eax, 0xffffffff // e8???????? | $sequence_9 = { 8bd6 8bc6 e8???????? 33ff c745f400004000 } // n = 5, score = 200 // 8bd6 | mov edx, esi // 8bc6 | mov eax, esi // e8???????? | // 33ff | xor edi, edi // c745f400004000 | mov dword ptr [ebp - 0xc], 0x400000 condition: 7 of them and filesize < 253952 }
If your designated proposal does not fit in any other category, feel free to write a free-text in the comment field below. Changes regarding references should be proposed on the Malpedia library page.
Your suggestion will be reviewed before being published. Thank you for contributing!
YYYY-MM-DD
YYYY-MM
YYYY