There is no description at this point.
rule win_confucius_auto { meta: author = "Felix Bilstein - yara-signator at cocacoding dot com" date = "2024-10-31" version = "1" description = "Detects win.confucius." 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.confucius" malpedia_rule_date = "20241030" malpedia_hash = "26e26953c49c8efafbf72a38076855d578e0a2e4" malpedia_version = "20241030" 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 = { 0101 eb11 8b442424 50 } // n = 4, score = 100 // 0101 | add dword ptr [ecx], eax // eb11 | jmp 0x13 // 8b442424 | mov eax, dword ptr [esp + 0x24] // 50 | push eax $sequence_1 = { 8b45f8 33c9 66898c45d0f7ffff 6639bdd0f7ffff 7428 } // n = 5, score = 100 // 8b45f8 | mov eax, dword ptr [ebp - 8] // 33c9 | xor ecx, ecx // 66898c45d0f7ffff | mov word ptr [ebp + eax*2 - 0x830], cx // 6639bdd0f7ffff | cmp word ptr [ebp - 0x830], di // 7428 | je 0x2a $sequence_2 = { 884710 5f 5e c9 c3 } // n = 5, score = 100 // 884710 | mov byte ptr [edi + 0x10], al // 5f | pop edi // 5e | pop esi // c9 | leave // c3 | ret $sequence_3 = { 85c0 0f85df020000 e8???????? 33f6 } // n = 4, score = 100 // 85c0 | test eax, eax // 0f85df020000 | jne 0x2e5 // e8???????? | // 33f6 | xor esi, esi $sequence_4 = { a3???????? 83ffff 7519 833d????????00 7510 } // n = 5, score = 100 // a3???????? | // 83ffff | cmp edi, -1 // 7519 | jne 0x1b // 833d????????00 | // 7510 | jne 0x12 $sequence_5 = { 750f 0fb74604 6683f82c 740c 6685c0 } // n = 5, score = 100 // 750f | jne 0x11 // 0fb74604 | movzx eax, word ptr [esi + 4] // 6683f82c | cmp ax, 0x2c // 740c | je 0xe // 6685c0 | test ax, ax $sequence_6 = { 01460c 8b44240c 85c0 7402 } // n = 4, score = 100 // 01460c | add dword ptr [esi + 0xc], eax // 8b44240c | mov eax, dword ptr [esp + 0xc] // 85c0 | test eax, eax // 7402 | je 4 $sequence_7 = { 0203 0405 0206 07 089090909090 } // n = 5, score = 100 // 0203 | add al, byte ptr [ebx] // 0405 | add al, 5 // 0206 | add al, byte ptr [esi] // 07 | pop es // 089090909090 | or byte ptr [eax - 0x6f6f6f70], dl $sequence_8 = { 0103 33c0 5f 5e 5d } // n = 5, score = 100 // 0103 | add dword ptr [ebx], eax // 33c0 | xor eax, eax // 5f | pop edi // 5e | pop esi // 5d | pop ebp $sequence_9 = { 8d85d0f7ffff 50 8d85288fffff 50 56 } // n = 5, score = 100 // 8d85d0f7ffff | lea eax, [ebp - 0x830] // 50 | push eax // 8d85288fffff | lea eax, [ebp - 0x70d8] // 50 | push eax // 56 | push esi $sequence_10 = { 00801d430023 d18a0688078a 46 018847018a46 } // n = 4, score = 100 // 00801d430023 | add byte ptr [eax + 0x2300431d], al // d18a0688078a | ror dword ptr [edx - 0x75f877fa], 1 // 46 | inc esi // 018847018a46 | add dword ptr [eax + 0x468a0147], ecx $sequence_11 = { 0101 eb21 8b4c2420 c744241000000000 } // n = 4, score = 100 // 0101 | add dword ptr [ecx], eax // eb21 | jmp 0x23 // 8b4c2420 | mov ecx, dword ptr [esp + 0x20] // c744241000000000 | mov dword ptr [esp + 0x10], 0 $sequence_12 = { 51 51 830d????????ff 53 55 } // n = 5, score = 100 // 51 | push ecx // 51 | push ecx // 830d????????ff | // 53 | push ebx // 55 | push ebp $sequence_13 = { 0344242c 8d940297ff2a43 8bc2 c1e816 } // n = 4, score = 100 // 0344242c | add eax, dword ptr [esp + 0x2c] // 8d940297ff2a43 | lea edx, [edx + eax + 0x432aff97] // 8bc2 | mov eax, edx // c1e816 | shr eax, 0x16 $sequence_14 = { 018118030000 8b442410 8b4c2420 5f } // n = 4, score = 100 // 018118030000 | add dword ptr [ecx + 0x318], eax // 8b442410 | mov eax, dword ptr [esp + 0x10] // 8b4c2420 | mov ecx, dword ptr [esp + 0x20] // 5f | pop edi $sequence_15 = { 030b 51 50 ff15???????? } // n = 4, score = 100 // 030b | add ecx, dword ptr [ebx] // 51 | push ecx // 50 | push eax // ff15???????? | condition: 7 of them and filesize < 598016 }
If your designated proposal does not fit in any other category, feel free to write a free-text in the comment field below. Changes regarding references should be proposed on the Malpedia library page.
Your suggestion will be reviewed before being published. Thank you for contributing!
YYYY-MM-DD
YYYY-MM
YYYY