There is no description at this point.
rule win_matrix_ransom_auto { meta: author = "Felix Bilstein - yara-signator at cocacoding dot com" date = "2020-10-14" version = "1" description = "autogenerated rule brought to you by yara-signator" tool = "yara-signator v0.5.0" signator_config = "callsandjumps;datarefs;binvalue" malpedia_reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.matrix_ransom" malpedia_rule_date = "20201014" malpedia_hash = "a7e3bd57eaf12bf3ea29a863c041091ba3af9ac9" malpedia_version = "20201014" 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 = { 8d95f0feffff 8bc6 ff55f8 8d95f0feffff 8bcf 8b45fc e8???????? } // n = 7, score = 100 // 8d95f0feffff | lea edx, [ebp - 0x110] // 8bc6 | mov eax, esi // ff55f8 | call dword ptr [ebp - 8] // 8d95f0feffff | lea edx, [ebp - 0x110] // 8bcf | mov ecx, edi // 8b45fc | mov eax, dword ptr [ebp - 4] // e8???????? | $sequence_1 = { 8d4c2410 8b03 33d2 8b38 ff5724 3d57000780 7507 } // n = 7, score = 100 // 8d4c2410 | lea ecx, [esp + 0x10] // 8b03 | mov eax, dword ptr [ebx] // 33d2 | xor edx, edx // 8b38 | mov edi, dword ptr [eax] // ff5724 | call dword ptr [edi + 0x24] // 3d57000780 | cmp eax, 0x80070057 // 7507 | jne 9 $sequence_2 = { e9???????? c645de01 eb04 c645de01 33c0 5a } // n = 6, score = 100 // e9???????? | // c645de01 | mov byte ptr [ebp - 0x22], 1 // eb04 | jmp 6 // c645de01 | mov byte ptr [ebp - 0x22], 1 // 33c0 | xor eax, eax // 5a | pop edx $sequence_3 = { 7c30 8b7500 85f6 7420 b21f b8???????? 8530 } // n = 7, score = 100 // 7c30 | jl 0x32 // 8b7500 | mov esi, dword ptr [ebp] // 85f6 | test esi, esi // 7420 | je 0x22 // b21f | mov dl, 0x1f // b8???????? | // 8530 | test dword ptr [eax], esi $sequence_4 = { 8bd3 85d2 7905 e8???????? 8d45fc e8???????? } // n = 6, score = 100 // 8bd3 | mov edx, ebx // 85d2 | test edx, edx // 7905 | jns 7 // e8???????? | // 8d45fc | lea eax, [ebp - 4] // e8???????? | $sequence_5 = { 0f8528ffffff 8b431c 83b8b801000000 0f94c0 8bd8 33c0 } // n = 6, score = 100 // 0f8528ffffff | jne 0xffffff2e // 8b431c | mov eax, dword ptr [ebx + 0x1c] // 83b8b801000000 | cmp dword ptr [eax + 0x1b8], 0 // 0f94c0 | sete al // 8bd8 | mov ebx, eax // 33c0 | xor eax, eax $sequence_6 = { 837de800 0f8485010000 8b45e8 8945e0 80bb8800000000 740f 8b45f0 } // n = 7, score = 100 // 837de800 | cmp dword ptr [ebp - 0x18], 0 // 0f8485010000 | je 0x18b // 8b45e8 | mov eax, dword ptr [ebp - 0x18] // 8945e0 | mov dword ptr [ebp - 0x20], eax // 80bb8800000000 | cmp byte ptr [ebx + 0x88], 0 // 740f | je 0x11 // 8b45f0 | mov eax, dword ptr [ebp - 0x10] $sequence_7 = { 83c030 e8???????? 8bf0 8bc3 83e804 740c 83e804 } // n = 7, score = 100 // 83c030 | add eax, 0x30 // e8???????? | // 8bf0 | mov esi, eax // 8bc3 | mov eax, ebx // 83e804 | sub eax, 4 // 740c | je 0xe // 83e804 | sub eax, 4 $sequence_8 = { ff530c 81bd0cf0ffffd1cd9549 7529 81bd70f5ffffd1cd9549 751d c645de00 8b45e8 } // n = 7, score = 100 // ff530c | call dword ptr [ebx + 0xc] // 81bd0cf0ffffd1cd9549 | cmp dword ptr [ebp - 0xff4], 0x4995cdd1 // 7529 | jne 0x2b // 81bd70f5ffffd1cd9549 | cmp dword ptr [ebp - 0xa90], 0x4995cdd1 // 751d | jne 0x1f // c645de00 | mov byte ptr [ebp - 0x22], 0 // 8b45e8 | mov eax, dword ptr [ebp - 0x18] $sequence_9 = { e8???????? 8d45fc 33c9 ba14000000 e8???????? bb01000000 8d45fc } // n = 7, score = 100 // e8???????? | // 8d45fc | lea eax, [ebp - 4] // 33c9 | xor ecx, ecx // ba14000000 | mov edx, 0x14 // e8???????? | // bb01000000 | mov ebx, 1 // 8d45fc | lea eax, [ebp - 4] condition: 7 of them and filesize < 2211840 }
If your designated proposal does not fit in any other category, feel free to write a free-text in the comment field below.
Please propose all changes regarding references on the Malpedia library page
Your suggestion will be reviewed before being published. Thank you for contributing!
YYYY-MM-DD
YYYY-MM
YYYY