There is no description at this point.
rule win_greenshaitan_auto { meta: author = "Felix Bilstein - yara-signator at cocacoding dot com" date = "2023-12-06" version = "1" description = "Detects win.greenshaitan." 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.greenshaitan" malpedia_rule_date = "20231130" malpedia_hash = "fc8a0e9f343f6d6ded9e7df1a64dac0cc68d7351" malpedia_version = "20230808" 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 = { 8b460c 8d542434 52 50 } // n = 4, score = 100 // 8b460c | mov eax, dword ptr [esi + 0xc] // 8d542434 | lea edx, [esp + 0x34] // 52 | push edx // 50 | push eax $sequence_1 = { 6a00 51 50 b940000000 e8???????? 8bf0 eb02 } // n = 7, score = 100 // 6a00 | push 0 // 51 | push ecx // 50 | push eax // b940000000 | mov ecx, 0x40 // e8???????? | // 8bf0 | mov esi, eax // eb02 | jmp 4 $sequence_2 = { 81ce00ffffff 46 8a1c0e 881c0f 88040e 8d4201 99 } // n = 7, score = 100 // 81ce00ffffff | or esi, 0xffffff00 // 46 | inc esi // 8a1c0e | mov bl, byte ptr [esi + ecx] // 881c0f | mov byte ptr [edi + ecx], bl // 88040e | mov byte ptr [esi + ecx], al // 8d4201 | lea eax, [edx + 1] // 99 | cdq $sequence_3 = { 8b442444 8b4c2440 8b7c243c 50 51 8d542418 52 } // n = 7, score = 100 // 8b442444 | mov eax, dword ptr [esp + 0x44] // 8b4c2440 | mov ecx, dword ptr [esp + 0x40] // 8b7c243c | mov edi, dword ptr [esp + 0x3c] // 50 | push eax // 51 | push ecx // 8d542418 | lea edx, [esp + 0x18] // 52 | push edx $sequence_4 = { e8???????? 85ed 740c 8b4500 eb09 8b4500 8bc8 } // n = 7, score = 100 // e8???????? | // 85ed | test ebp, ebp // 740c | je 0xe // 8b4500 | mov eax, dword ptr [ebp] // eb09 | jmp 0xb // 8b4500 | mov eax, dword ptr [ebp] // 8bc8 | mov ecx, eax $sequence_5 = { 51 ff15???????? 8b8c240c200000 5e 5d } // n = 5, score = 100 // 51 | push ecx // ff15???????? | // 8b8c240c200000 | mov ecx, dword ptr [esp + 0x200c] // 5e | pop esi // 5d | pop ebp $sequence_6 = { 0fb69b685b6e00 8819 0fb6d2 8bda c1eb04 c1e004 0bd8 } // n = 7, score = 100 // 0fb69b685b6e00 | movzx ebx, byte ptr [ebx + 0x6e5b68] // 8819 | mov byte ptr [ecx], bl // 0fb6d2 | movzx edx, dl // 8bda | mov ebx, edx // c1eb04 | shr ebx, 4 // c1e004 | shl eax, 4 // 0bd8 | or ebx, eax $sequence_7 = { 8bc8 ebe1 33c0 397814 770e 85ed 7405 } // n = 7, score = 100 // 8bc8 | mov ecx, eax // ebe1 | jmp 0xffffffe3 // 33c0 | xor eax, eax // 397814 | cmp dword ptr [eax + 0x14], edi // 770e | ja 0x10 // 85ed | test ebp, ebp // 7405 | je 7 $sequence_8 = { 33f6 8bc5 99 6a00 52 c644244400 50 } // n = 7, score = 100 // 33f6 | xor esi, esi // 8bc5 | mov eax, ebp // 99 | cdq // 6a00 | push 0 // 52 | push edx // c644244400 | mov byte ptr [esp + 0x44], 0 // 50 | push eax $sequence_9 = { 720d 8b542434 52 e8???????? 83c404 c784248c000000ffffffff 897c2448 } // n = 7, score = 100 // 720d | jb 0xf // 8b542434 | mov edx, dword ptr [esp + 0x34] // 52 | push edx // e8???????? | // 83c404 | add esp, 4 // c784248c000000ffffffff | mov dword ptr [esp + 0x8c], 0xffffffff // 897c2448 | mov dword ptr [esp + 0x48], edi condition: 7 of them and filesize < 253952 }
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