Actor(s): Stone Panda
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rule win_anel_auto { meta: author = "Felix Bilstein - yara-signator at cocacoding dot com" date = "2023-01-25" version = "1" description = "Detects win.anel." 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.anel" malpedia_rule_date = "20230124" malpedia_hash = "2ee0eebba83dce3d019a90519f2f972c0fcf9686" malpedia_version = "20230125" 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 = { 53 8db55cffffff e8???????? 53 8d75b0 e8???????? 8d9d24feffff } // n = 7, score = 200 // 53 | push ebx // 8db55cffffff | lea esi, [ebp - 0xa4] // e8???????? | // 53 | push ebx // 8d75b0 | lea esi, [ebp - 0x50] // e8???????? | // 8d9d24feffff | lea ebx, [ebp - 0x1dc] $sequence_1 = { 8b4598 8b402c 7204 8b0e eb02 8bce 50 } // n = 7, score = 200 // 8b4598 | mov eax, dword ptr [ebp - 0x68] // 8b402c | mov eax, dword ptr [eax + 0x2c] // 7204 | jb 6 // 8b0e | mov ecx, dword ptr [esi] // eb02 | jmp 4 // 8bce | mov ecx, esi // 50 | push eax $sequence_2 = { 8db544ffffff e8???????? 8d9d34ffffff e8???????? eb10 68???????? ffb530ffffff } // n = 7, score = 200 // 8db544ffffff | lea esi, [ebp - 0xbc] // e8???????? | // 8d9d34ffffff | lea ebx, [ebp - 0xcc] // e8???????? | // eb10 | jmp 0x12 // 68???????? | // ffb530ffffff | push dword ptr [ebp - 0xd0] $sequence_3 = { 55 8bec 51 51 8b0b 85c9 743e } // n = 7, score = 200 // 55 | push ebp // 8bec | mov ebp, esp // 51 | push ecx // 51 | push ecx // 8b0b | mov ecx, dword ptr [ebx] // 85c9 | test ecx, ecx // 743e | je 0x40 $sequence_4 = { ffb540faffff 50 8d85b8fbffff 50 e8???????? 6a0f 59 } // n = 7, score = 200 // ffb540faffff | push dword ptr [ebp - 0x5c0] // 50 | push eax // 8d85b8fbffff | lea eax, [ebp - 0x448] // 50 | push eax // e8???????? | // 6a0f | push 0xf // 59 | pop ecx $sequence_5 = { a5 8b7df4 8d75c0 a5 a5 a5 a5 } // n = 7, score = 200 // a5 | movsd dword ptr es:[edi], dword ptr [esi] // 8b7df4 | mov edi, dword ptr [ebp - 0xc] // 8d75c0 | lea esi, [ebp - 0x40] // a5 | movsd dword ptr es:[edi], dword ptr [esi] // a5 | movsd dword ptr es:[edi], dword ptr [esi] // a5 | movsd dword ptr es:[edi], dword ptr [esi] // a5 | movsd dword ptr es:[edi], dword ptr [esi] $sequence_6 = { c1fe04 81fefeffff0f 760a 68???????? e8???????? 8b4208 2bc1 } // n = 7, score = 200 // c1fe04 | sar esi, 4 // 81fefeffff0f | cmp esi, 0xffffffe // 760a | jbe 0xc // 68???????? | // e8???????? | // 8b4208 | mov eax, dword ptr [edx + 8] // 2bc1 | sub eax, ecx $sequence_7 = { 898564feffff 899568feffff e8???????? 8d855cfeffff 8d5dd8 e8???????? 83858cfeffff1c } // n = 7, score = 200 // 898564feffff | mov dword ptr [ebp - 0x19c], eax // 899568feffff | mov dword ptr [ebp - 0x198], edx // e8???????? | // 8d855cfeffff | lea eax, [ebp - 0x1a4] // 8d5dd8 | lea ebx, [ebp - 0x28] // e8???????? | // 83858cfeffff1c | add dword ptr [ebp - 0x174], 0x1c $sequence_8 = { 83781410 8b5010 7202 8b00 ff750c 8bc8 } // n = 6, score = 200 // 83781410 | cmp dword ptr [eax + 0x14], 0x10 // 8b5010 | mov edx, dword ptr [eax + 0x10] // 7202 | jb 4 // 8b00 | mov eax, dword ptr [eax] // ff750c | push dword ptr [ebp + 0xc] // 8bc8 | mov ecx, eax $sequence_9 = { 8bc8 e8???????? 6a01 33ff 8d7594 c645fc02 e8???????? } // n = 7, score = 200 // 8bc8 | mov ecx, eax // e8???????? | // 6a01 | push 1 // 33ff | xor edi, edi // 8d7594 | lea esi, [ebp - 0x6c] // c645fc02 | mov byte ptr [ebp - 4], 2 // e8???????? | condition: 7 of them and filesize < 376832 }
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