Actor(s): APT41, Axiom
There is no description at this point.
rule win_shadowpad_auto { meta: author = "Felix Bilstein - yara-signator at cocacoding dot com" date = "2020-12-22" version = "1" description = "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.shadowpad" malpedia_rule_date = "20201222" malpedia_hash = "30354d830a29f0fbd3714d93d94dea941d77a130" malpedia_version = "20201023" 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 = { 897e04 8b4608 3bc7 740d 50 e8???????? 59 } // n = 7, score = 200 // 897e04 | mov dword ptr [esi + 4], edi // 8b4608 | mov eax, dword ptr [esi + 8] // 3bc7 | cmp eax, edi // 740d | je 0xf // 50 | push eax // e8???????? | // 59 | pop ecx $sequence_1 = { 2b442410 8b4c2444 1b4c2414 781e } // n = 4, score = 200 // 2b442410 | sub eax, dword ptr [esp + 0x10] // 8b4c2444 | mov ecx, dword ptr [esp + 0x44] // 1b4c2414 | sbb ecx, dword ptr [esp + 0x14] // 781e | js 0x20 $sequence_2 = { 85c0 7410 8d75e8 e8???????? 6a0d 5f } // n = 6, score = 200 // 85c0 | test eax, eax // 7410 | je 0x12 // 8d75e8 | lea esi, [ebp - 0x18] // e8???????? | // 6a0d | push 0xd // 5f | pop edi $sequence_3 = { 88144b 8a0408 8b560c c0e804 } // n = 4, score = 200 // 88144b | mov byte ptr [ebx + ecx*2], dl // 8a0408 | mov al, byte ptr [eax + ecx] // 8b560c | mov edx, dword ptr [esi + 0xc] // c0e804 | shr al, 4 $sequence_4 = { 57 50 ff742420 ff15???????? 8d742468 e8???????? } // n = 6, score = 200 // 57 | push edi // 50 | push eax // ff742420 | push dword ptr [esp + 0x20] // ff15???????? | // 8d742468 | lea esi, [esp + 0x68] // e8???????? | $sequence_5 = { 8975dc 8975e4 8975e0 e8???????? } // n = 4, score = 200 // 8975dc | mov dword ptr [ebp - 0x24], esi // 8975e4 | mov dword ptr [ebp - 0x1c], esi // 8975e0 | mov dword ptr [ebp - 0x20], esi // e8???????? | $sequence_6 = { 897c2410 897c2414 8d442440 50 8d44241c 50 } // n = 6, score = 200 // 897c2410 | mov dword ptr [esp + 0x10], edi // 897c2414 | mov dword ptr [esp + 0x14], edi // 8d442440 | lea eax, [esp + 0x40] // 50 | push eax // 8d44241c | lea eax, [esp + 0x1c] // 50 | push eax $sequence_7 = { 8d850cefffff 50 8d45c0 e8???????? 8d4de8 51 e8???????? } // n = 7, score = 200 // 8d850cefffff | lea eax, [ebp - 0x10f4] // 50 | push eax // 8d45c0 | lea eax, [ebp - 0x40] // e8???????? | // 8d4de8 | lea ecx, [ebp - 0x18] // 51 | push ecx // e8???????? | $sequence_8 = { a3???????? ff7508 ff35???????? ffd0 c9 c3 55 } // n = 7, score = 200 // a3???????? | // ff7508 | push dword ptr [ebp + 8] // ff35???????? | // ffd0 | call eax // c9 | leave // c3 | ret // 55 | push ebp $sequence_9 = { 8d0481 8b0410 03c2 3b5d08 7410 ff45fc } // n = 6, score = 200 // 8d0481 | lea eax, [ecx + eax*4] // 8b0410 | mov eax, dword ptr [eax + edx] // 03c2 | add eax, edx // 3b5d08 | cmp ebx, dword ptr [ebp + 8] // 7410 | je 0x12 // ff45fc | inc dword ptr [ebp - 4] condition: 7 of them and filesize < 188416 }
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