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rule win_monero_miner_auto { meta: author = "Felix Bilstein - yara-signator at cocacoding dot com" date = "2023-07-11" version = "1" description = "Detects win.monero_miner." 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.monero_miner" 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 = { 894c2440 8b4c2440 895c2444 89c3 89d0 8b542444 8b6c2444 } // n = 7, score = 100 // 894c2440 | mov dword ptr [esp + 0x40], ecx // 8b4c2440 | mov ecx, dword ptr [esp + 0x40] // 895c2444 | mov dword ptr [esp + 0x44], ebx // 89c3 | mov ebx, eax // 89d0 | mov eax, edx // 8b542444 | mov edx, dword ptr [esp + 0x44] // 8b6c2444 | mov ebp, dword ptr [esp + 0x44] $sequence_1 = { 8b542434 896c2420 01c1 89c5 11d3 0facd018 0facea18 } // n = 7, score = 100 // 8b542434 | mov edx, dword ptr [esp + 0x34] // 896c2420 | mov dword ptr [esp + 0x20], ebp // 01c1 | add ecx, eax // 89c5 | mov ebp, eax // 11d3 | adc ebx, edx // 0facd018 | shrd eax, edx, 0x18 // 0facea18 | shrd edx, ebp, 0x18 $sequence_2 = { 89442410 8b4638 c744240804000000 895c2404 8944240c 8b07 890424 } // n = 7, score = 100 // 89442410 | mov dword ptr [esp + 0x10], eax // 8b4638 | mov eax, dword ptr [esi + 0x38] // c744240804000000 | mov dword ptr [esp + 8], 4 // 895c2404 | mov dword ptr [esp + 4], ebx // 8944240c | mov dword ptr [esp + 0xc], eax // 8b07 | mov eax, dword ptr [edi] // 890424 | mov dword ptr [esp], eax $sequence_3 = { 85d1 0f95c2 0fb6d2 89d0 83c802 85f1 0f45d0 } // n = 7, score = 100 // 85d1 | test ecx, edx // 0f95c2 | setne dl // 0fb6d2 | movzx edx, dl // 89d0 | mov eax, edx // 83c802 | or eax, 2 // 85f1 | test ecx, esi // 0f45d0 | cmovne edx, eax $sequence_4 = { e9???????? a1???????? 85c0 740c 83e801 85c0 a3???????? } // n = 7, score = 100 // e9???????? | // a1???????? | // 85c0 | test eax, eax // 740c | je 0xe // 83e801 | sub eax, 1 // 85c0 | test eax, eax // a3???????? | $sequence_5 = { 8b7d24 89b424f0030000 8b7520 894c2440 898c24d8030000 89542444 899424dc030000 } // n = 7, score = 100 // 8b7d24 | mov edi, dword ptr [ebp + 0x24] // 89b424f0030000 | mov dword ptr [esp + 0x3f0], esi // 8b7520 | mov esi, dword ptr [ebp + 0x20] // 894c2440 | mov dword ptr [esp + 0x40], ecx // 898c24d8030000 | mov dword ptr [esp + 0x3d8], ecx // 89542444 | mov dword ptr [esp + 0x44], edx // 899424dc030000 | mov dword ptr [esp + 0x3dc], edx $sequence_6 = { 8b8424b0000000 89c5 0fa4d01f 0fa4ea1f 89cd 31c5 31da } // n = 7, score = 100 // 8b8424b0000000 | mov eax, dword ptr [esp + 0xb0] // 89c5 | mov ebp, eax // 0fa4d01f | shld eax, edx, 0x1f // 0fa4ea1f | shld edx, ebp, 0x1f // 89cd | mov ebp, ecx // 31c5 | xor ebp, eax // 31da | xor edx, ebx $sequence_7 = { 89542408 89442404 892c24 e8???????? 891c24 e8???????? 85c0 } // n = 7, score = 100 // 89542408 | mov dword ptr [esp + 8], edx // 89442404 | mov dword ptr [esp + 4], eax // 892c24 | mov dword ptr [esp], ebp // e8???????? | // 891c24 | mov dword ptr [esp], ebx // e8???????? | // 85c0 | test eax, eax $sequence_8 = { e9???????? 8b442428 894238 31c0 e9???????? 8b442428 8982e4000000 } // n = 7, score = 100 // e9???????? | // 8b442428 | mov eax, dword ptr [esp + 0x28] // 894238 | mov dword ptr [edx + 0x38], eax // 31c0 | xor eax, eax // e9???????? | // 8b442428 | mov eax, dword ptr [esp + 0x28] // 8982e4000000 | mov dword ptr [edx + 0xe4], eax $sequence_9 = { 89c2 c1e506 83e23f 01ea 0fb6440f01 83c101 } // n = 6, score = 100 // 89c2 | mov edx, eax // c1e506 | shl ebp, 6 // 83e23f | and edx, 0x3f // 01ea | add edx, ebp // 0fb6440f01 | movzx eax, byte ptr [edi + ecx + 1] // 83c101 | add ecx, 1 condition: 7 of them and filesize < 1425408 }
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