Actor(s): Stone Panda
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rule win_anel_auto { meta: author = "Felix Bilstein - yara-signator at cocacoding dot com" date = "2023-07-11" 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 = "20230705" malpedia_hash = "42d0574f4405bd7d2b154d321d345acb18834a41" malpedia_version = "20230715" 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???????? 52 50 8d4590 68???????? 50 e8???????? } // n = 7, score = 200 // e8???????? | // 52 | push edx // 50 | push eax // 8d4590 | lea eax, [ebp - 0x70] // 68???????? | // 50 | push eax // e8???????? | $sequence_1 = { 8b4110 05b1675616 0301 8d4a04 eb19 8b3a } // n = 6, score = 200 // 8b4110 | mov eax, dword ptr [ecx + 0x10] // 05b1675616 | add eax, 0x165667b1 // 0301 | add eax, dword ptr [ecx] // 8d4a04 | lea ecx, [edx + 4] // eb19 | jmp 0x1b // 8b3a | mov edi, dword ptr [edx] $sequence_2 = { 8bda 50 8d75d4 895db4 894db0 e8???????? 8365fc00 } // n = 7, score = 200 // 8bda | mov ebx, edx // 50 | push eax // 8d75d4 | lea esi, [ebp - 0x2c] // 895db4 | mov dword ptr [ebp - 0x4c], ebx // 894db0 | mov dword ptr [ebp - 0x50], ecx // e8???????? | // 8365fc00 | and dword ptr [ebp - 4], 0 $sequence_3 = { 8b4b14 83f908 7204 8b03 eb02 8bc3 6683382f } // n = 7, score = 200 // 8b4b14 | mov ecx, dword ptr [ebx + 0x14] // 83f908 | cmp ecx, 8 // 7204 | jb 6 // 8b03 | mov eax, dword ptr [ebx] // eb02 | jmp 4 // 8bc3 | mov eax, ebx // 6683382f | cmp word ptr [eax], 0x2f $sequence_4 = { 837b1410 7202 8b1b 6a00 56 ff36 53 } // n = 7, score = 200 // 837b1410 | cmp dword ptr [ebx + 0x14], 0x10 // 7202 | jb 4 // 8b1b | mov ebx, dword ptr [ebx] // 6a00 | push 0 // 56 | push esi // ff36 | push dword ptr [esi] // 53 | push ebx $sequence_5 = { e8???????? 6a01 8d75ac e8???????? 6a01 8db568ffffff c645fc03 } // n = 7, score = 200 // e8???????? | // 6a01 | push 1 // 8d75ac | lea esi, [ebp - 0x54] // e8???????? | // 6a01 | push 1 // 8db568ffffff | lea esi, [ebp - 0x98] // c645fc03 | mov byte ptr [ebp - 4], 3 $sequence_6 = { a5 a5 a5 a5 8bfb 8d5c1b02 3b5d0c } // n = 7, score = 200 // 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] // 8bfb | mov edi, ebx // 8d5c1b02 | lea ebx, [ebx + ebx + 2] // 3b5d0c | cmp ebx, dword ptr [ebp + 0xc] $sequence_7 = { 8bc6 50 e8???????? c9 c3 6a08 b8???????? } // n = 7, score = 200 // 8bc6 | mov eax, esi // 50 | push eax // e8???????? | // c9 | leave // c3 | ret // 6a08 | push 8 // b8???????? | $sequence_8 = { 8d550c 52 51 50 53 ff15???????? } // n = 6, score = 200 // 8d550c | lea edx, [ebp + 0xc] // 52 | push edx // 51 | push ecx // 50 | push eax // 53 | push ebx // ff15???????? | $sequence_9 = { 50 e8???????? 59 8945e8 85c0 0f848e000000 8365fc00 } // n = 7, score = 200 // 50 | push eax // e8???????? | // 59 | pop ecx // 8945e8 | mov dword ptr [ebp - 0x18], eax // 85c0 | test eax, eax // 0f848e000000 | je 0x94 // 8365fc00 | and dword ptr [ebp - 4], 0 condition: 7 of them and filesize < 376832 }
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