Actor(s): Silent Chollima
There is no description at this point.
rule win_maui_auto { meta: author = "Felix Bilstein - yara-signator at cocacoding dot com" date = "2023-03-28" version = "1" description = "Detects win.maui." 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.maui" 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 = { 83c40c 85c0 0f84f4010000 8b5610 52 53 e8???????? } // n = 7, score = 100 // 83c40c | add esp, 0xc // 85c0 | test eax, eax // 0f84f4010000 | je 0x1fa // 8b5610 | mov edx, dword ptr [esi + 0x10] // 52 | push edx // 53 | push ebx // e8???????? | $sequence_1 = { 8bef 81e5ff000000 3314add0b94800 8beb 335614 8bf0 c1ee10 } // n = 7, score = 100 // 8bef | mov ebp, edi // 81e5ff000000 | and ebp, 0xff // 3314add0b94800 | xor edx, dword ptr [ebp*4 + 0x48b9d0] // 8beb | mov ebp, ebx // 335614 | xor edx, dword ptr [esi + 0x14] // 8bf0 | mov esi, eax // c1ee10 | shr esi, 0x10 $sequence_2 = { e8???????? 8b4c2464 89442438 8b410c 83c41c 85c0 743b } // n = 7, score = 100 // e8???????? | // 8b4c2464 | mov ecx, dword ptr [esp + 0x64] // 89442438 | mov dword ptr [esp + 0x38], eax // 8b410c | mov eax, dword ptr [ecx + 0xc] // 83c41c | add esp, 0x1c // 85c0 | test eax, eax // 743b | je 0x3d $sequence_3 = { 894e04 8bc8 c1f81f 2bca 8bd7 1bc2 } // n = 6, score = 100 // 894e04 | mov dword ptr [esi + 4], ecx // 8bc8 | mov ecx, eax // c1f81f | sar eax, 0x1f // 2bca | sub ecx, edx // 8bd7 | mov edx, edi // 1bc2 | sbb eax, edx $sequence_4 = { 742e 33ed c744243001000000 eb22 6829040000 eb05 } // n = 6, score = 100 // 742e | je 0x30 // 33ed | xor ebp, ebp // c744243001000000 | mov dword ptr [esp + 0x30], 1 // eb22 | jmp 0x24 // 6829040000 | push 0x429 // eb05 | jmp 7 $sequence_5 = { 755a 6852010000 68???????? 6a20 6a69 6a21 e8???????? } // n = 7, score = 100 // 755a | jne 0x5c // 6852010000 | push 0x152 // 68???????? | // 6a20 | push 0x20 // 6a69 | push 0x69 // 6a21 | push 0x21 // e8???????? | $sequence_6 = { 41 57 51 e8???????? 83c40c 85c0 0f84d9000000 } // n = 7, score = 100 // 41 | inc ecx // 57 | push edi // 51 | push ecx // e8???????? | // 83c40c | add esp, 0xc // 85c0 | test eax, eax // 0f84d9000000 | je 0xdf $sequence_7 = { ff7508 e8???????? 83c410 8945f4 83f8ff 0f856f010000 e8???????? } // n = 7, score = 100 // ff7508 | push dword ptr [ebp + 8] // e8???????? | // 83c410 | add esp, 0x10 // 8945f4 | mov dword ptr [ebp - 0xc], eax // 83f8ff | cmp eax, -1 // 0f856f010000 | jne 0x175 // e8???????? | $sequence_8 = { e8???????? 83c40c 85c0 0f8401030000 837d0400 0f84f7020000 } // n = 6, score = 100 // e8???????? | // 83c40c | add esp, 0xc // 85c0 | test eax, eax // 0f8401030000 | je 0x307 // 837d0400 | cmp dword ptr [ebp + 4], 0 // 0f84f7020000 | je 0x2fd $sequence_9 = { 7c0a c744242408000000 eb1c 53 e8???????? 33c9 83c404 } // n = 7, score = 100 // 7c0a | jl 0xc // c744242408000000 | mov dword ptr [esp + 0x24], 8 // eb1c | jmp 0x1e // 53 | push ebx // e8???????? | // 33c9 | xor ecx, ecx // 83c404 | add esp, 4 condition: 7 of them and filesize < 1616896 }
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