Actor(s): Red Menshen
There is no description at this point.
rule win_mangzamel_auto { meta: author = "Felix Bilstein - yara-signator at cocacoding dot com" date = "2023-01-25" version = "1" description = "Detects win.mangzamel." 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.mangzamel" malpedia_rule_date = "20230124" malpedia_hash = "2ee0eebba83dce3d019a90519f2f972c0fcf9686" malpedia_version = "20230125" 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 = { 5b c9 c21400 80650b00 b8???????? c3 b8???????? } // n = 7, score = 400 // 5b | pop ebx // c9 | leave // c21400 | ret 0x14 // 80650b00 | and byte ptr [ebp + 0xb], 0 // b8???????? | // c3 | ret // b8???????? | $sequence_1 = { 57 e8???????? e9???????? 8b4d10 6a64 53 e8???????? } // n = 7, score = 400 // 57 | push edi // e8???????? | // e9???????? | // 8b4d10 | mov ecx, dword ptr [ebp + 0x10] // 6a64 | push 0x64 // 53 | push ebx // e8???????? | $sequence_2 = { 6805261111 51 ff7008 8bce e8???????? eb05 e8???????? } // n = 7, score = 400 // 6805261111 | push 0x11112605 // 51 | push ecx // ff7008 | push dword ptr [eax + 8] // 8bce | mov ecx, esi // e8???????? | // eb05 | jmp 7 // e8???????? | $sequence_3 = { 8d857895ffff 8b08 3bcb 7603 49 8908 8b466c } // n = 7, score = 400 // 8d857895ffff | lea eax, [ebp - 0x6a88] // 8b08 | mov ecx, dword ptr [eax] // 3bcb | cmp ecx, ebx // 7603 | jbe 5 // 49 | dec ecx // 8908 | mov dword ptr [eax], ecx // 8b466c | mov eax, dword ptr [esi + 0x6c] $sequence_4 = { 53 50 e8???????? 8d857895ffff 57 50 8d858ec9ffff } // n = 7, score = 400 // 53 | push ebx // 50 | push eax // e8???????? | // 8d857895ffff | lea eax, [ebp - 0x6a88] // 57 | push edi // 50 | push eax // 8d858ec9ffff | lea eax, [ebp - 0x3672] $sequence_5 = { 894160 668b442408 66894164 c20800 53 56 8bf1 } // n = 7, score = 400 // 894160 | mov dword ptr [ecx + 0x60], eax // 668b442408 | mov ax, word ptr [esp + 8] // 66894164 | mov word ptr [ecx + 0x64], ax // c20800 | ret 8 // 53 | push ebx // 56 | push esi // 8bf1 | mov esi, ecx $sequence_6 = { 8b490c 56 33c0 33f6 3bc8 7419 8bd1 } // n = 7, score = 400 // 8b490c | mov ecx, dword ptr [ecx + 0xc] // 56 | push esi // 33c0 | xor eax, eax // 33f6 | xor esi, esi // 3bc8 | cmp ecx, eax // 7419 | je 0x1b // 8bd1 | mov edx, ecx $sequence_7 = { 834dfcff 8d4dac e8???????? 8b4df4 64890d00000000 c9 c21400 } // n = 7, score = 400 // 834dfcff | or dword ptr [ebp - 4], 0xffffffff // 8d4dac | lea ecx, [ebp - 0x54] // e8???????? | // 8b4df4 | mov ecx, dword ptr [ebp - 0xc] // 64890d00000000 | mov dword ptr fs:[0], ecx // c9 | leave // c21400 | ret 0x14 $sequence_8 = { c9 c3 55 8bec 83ec54 8b4d18 53 } // n = 7, score = 400 // c9 | leave // c3 | ret // 55 | push ebp // 8bec | mov ebp, esp // 83ec54 | sub esp, 0x54 // 8b4d18 | mov ecx, dword ptr [ebp + 0x18] // 53 | push ebx $sequence_9 = { 56 57 e8???????? 59 59 5f 8ac3 } // n = 7, score = 400 // 56 | push esi // 57 | push edi // e8???????? | // 59 | pop ecx // 59 | pop ecx // 5f | pop edi // 8ac3 | mov al, bl condition: 7 of them and filesize < 360448 }
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