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rule win_smarteyes_auto { meta: author = "Felix Bilstein - yara-signator at cocacoding dot com" date = "2023-03-28" version = "1" description = "Detects win.smarteyes." 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.smarteyes" malpedia_rule_date = "20230328" malpedia_hash = "9d2d75cef573c1c2d861f5197df8f563b05a305d" malpedia_version = "20230407" 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 = { 83c414 8d8504070000 50 6804010000 ff15???????? e8???????? } // n = 6, score = 100 // 83c414 | add esp, 0x14 // 8d8504070000 | lea eax, [ebp + 0x704] // 50 | push eax // 6804010000 | push 0x104 // ff15???????? | // e8???????? | $sequence_1 = { 8d842440020000 50 ff15???????? e8???????? f7d8 1bc0 2520043600 } // n = 7, score = 100 // 8d842440020000 | lea eax, [esp + 0x240] // 50 | push eax // ff15???????? | // e8???????? | // f7d8 | neg eax // 1bc0 | sbb eax, eax // 2520043600 | and eax, 0x360420 $sequence_2 = { 8d0458 50 8bc7 e9???????? 03d3 895508 } // n = 6, score = 100 // 8d0458 | lea eax, [eax + ebx*2] // 50 | push eax // 8bc7 | mov eax, edi // e9???????? | // 03d3 | add edx, ebx // 895508 | mov dword ptr [ebp + 8], edx $sequence_3 = { 56 56 56 8d85c8fcffff 50 89bd50faffff } // n = 6, score = 100 // 56 | push esi // 56 | push esi // 56 | push esi // 8d85c8fcffff | lea eax, [ebp - 0x338] // 50 | push eax // 89bd50faffff | mov dword ptr [ebp - 0x5b0], edi $sequence_4 = { 81ecc0050000 a1???????? 33c5 8945fc 6a40 8d8540faffff 6a00 } // n = 7, score = 100 // 81ecc0050000 | sub esp, 0x5c0 // a1???????? | // 33c5 | xor eax, ebp // 8945fc | mov dword ptr [ebp - 4], eax // 6a40 | push 0x40 // 8d8540faffff | lea eax, [ebp - 0x5c0] // 6a00 | push 0 $sequence_5 = { 8d85ccfdffff 50 8d85d4fdffff 50 6a00 68???????? 68???????? } // n = 7, score = 100 // 8d85ccfdffff | lea eax, [ebp - 0x234] // 50 | push eax // 8d85d4fdffff | lea eax, [ebp - 0x22c] // 50 | push eax // 6a00 | push 0 // 68???????? | // 68???????? | $sequence_6 = { 8d85ecfeffff 50 ff15???????? 85c0 7507 33c0 } // n = 6, score = 100 // 8d85ecfeffff | lea eax, [ebp - 0x114] // 50 | push eax // ff15???????? | // 85c0 | test eax, eax // 7507 | jne 9 // 33c0 | xor eax, eax $sequence_7 = { 50 ff15???????? 8d9de8feffff e8???????? 6a00 68???????? } // n = 6, score = 100 // 50 | push eax // ff15???????? | // 8d9de8feffff | lea ebx, [ebp - 0x118] // e8???????? | // 6a00 | push 0 // 68???????? | $sequence_8 = { 395d90 75b8 56 ff15???????? ff758c ff15???????? 33c0 } // n = 7, score = 100 // 395d90 | cmp dword ptr [ebp - 0x70], ebx // 75b8 | jne 0xffffffba // 56 | push esi // ff15???????? | // ff758c | push dword ptr [ebp - 0x74] // ff15???????? | // 33c0 | xor eax, eax $sequence_9 = { 3bf3 7506 8d85e4feffff 50 ff15???????? 8bf0 } // n = 6, score = 100 // 3bf3 | cmp esi, ebx // 7506 | jne 8 // 8d85e4feffff | lea eax, [ebp - 0x11c] // 50 | push eax // ff15???????? | // 8bf0 | mov esi, eax condition: 7 of them and filesize < 429056 }
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