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rule win_neutrino_pos_auto { meta: author = "Felix Bilstein - yara-signator at cocacoding dot com" date = "2023-03-28" version = "1" description = "Detects win.neutrino_pos." 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.neutrino_pos" 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 = { 56 e8???????? 59 ff75f8 e8???????? 59 5f } // n = 7, score = 200 // 56 | push esi // e8???????? | // 59 | pop ecx // ff75f8 | push dword ptr [ebp - 8] // e8???????? | // 59 | pop ecx // 5f | pop edi $sequence_1 = { 8bc1 66898568ffffff 58 6a74 6689856affffff } // n = 5, score = 200 // 8bc1 | mov eax, ecx // 66898568ffffff | mov word ptr [ebp - 0x98], ax // 58 | pop eax // 6a74 | push 0x74 // 6689856affffff | mov word ptr [ebp - 0x96], ax $sequence_2 = { 58 6a71 668945b4 58 6a66 668945b6 } // n = 6, score = 200 // 58 | pop eax // 6a71 | push 0x71 // 668945b4 | mov word ptr [ebp - 0x4c], ax // 58 | pop eax // 6a66 | push 0x66 // 668945b6 | mov word ptr [ebp - 0x4a], ax $sequence_3 = { 5b 6a74 66899d7cffffff 5b 66899d7effffff 6a44 8bda } // n = 7, score = 200 // 5b | pop ebx // 6a74 | push 0x74 // 66899d7cffffff | mov word ptr [ebp - 0x84], bx // 5b | pop ebx // 66899d7effffff | mov word ptr [ebp - 0x82], bx // 6a44 | push 0x44 // 8bda | mov ebx, edx $sequence_4 = { 58 6a43 8bc8 66898d4effffff 59 6a65 } // n = 6, score = 200 // 58 | pop eax // 6a43 | push 0x43 // 8bc8 | mov ecx, eax // 66898d4effffff | mov word ptr [ebp - 0xb2], cx // 59 | pop ecx // 6a65 | push 0x65 $sequence_5 = { 57 ff55f8 83c410 eb0f ff7508 68???????? 57 } // n = 7, score = 200 // 57 | push edi // ff55f8 | call dword ptr [ebp - 8] // 83c410 | add esp, 0x10 // eb0f | jmp 0x11 // ff7508 | push dword ptr [ebp + 8] // 68???????? | // 57 | push edi $sequence_6 = { 58 6a75 6689855affffff 58 6a4f 6689855cffffff 58 } // n = 7, score = 200 // 58 | pop eax // 6a75 | push 0x75 // 6689855affffff | mov word ptr [ebp - 0xa6], ax // 58 | pop eax // 6a4f | push 0x4f // 6689855cffffff | mov word ptr [ebp - 0xa4], ax // 58 | pop eax $sequence_7 = { 58 6a69 66898574ffffff 58 6a63 66898576ffffff } // n = 6, score = 200 // 58 | pop eax // 6a69 | push 0x69 // 66898574ffffff | mov word ptr [ebp - 0x8c], ax // 58 | pop eax // 6a63 | push 0x63 // 66898576ffffff | mov word ptr [ebp - 0x8a], ax $sequence_8 = { 6a73 66898552ffffff 58 6a6e 66898554ffffff 58 6a61 } // n = 7, score = 200 // 6a73 | push 0x73 // 66898552ffffff | mov word ptr [ebp - 0xae], ax // 58 | pop eax // 6a6e | push 0x6e // 66898554ffffff | mov word ptr [ebp - 0xac], ax // 58 | pop eax // 6a61 | push 0x61 $sequence_9 = { 6a72 668945a0 58 6a07 668945a2 58 66894d9a } // n = 7, score = 200 // 6a72 | push 0x72 // 668945a0 | mov word ptr [ebp - 0x60], ax // 58 | pop eax // 6a07 | push 7 // 668945a2 | mov word ptr [ebp - 0x5e], ax // 58 | pop eax // 66894d9a | mov word ptr [ebp - 0x66], cx condition: 7 of them and filesize < 188416 }
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