There is no description at this point.
rule win_zupdax_auto { meta: author = "Felix Bilstein - yara-signator at cocacoding dot com" date = "2023-03-28" version = "1" description = "Detects win.zupdax." 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.zupdax" 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 = { e8???????? 83c408 8b4618 50 895e24 } // n = 5, score = 300 // e8???????? | // 83c408 | add esp, 8 // 8b4618 | mov eax, dword ptr [esi + 0x18] // 50 | push eax // 895e24 | mov dword ptr [esi + 0x24], ebx $sequence_1 = { 50 e8???????? 8b0d???????? 8b15???????? 66a1???????? 68f6000000 } // n = 6, score = 300 // 50 | push eax // e8???????? | // 8b0d???????? | // 8b15???????? | // 66a1???????? | // 68f6000000 | push 0xf6 $sequence_2 = { e8???????? 83c418 8bc6 c3 55 8bec 6aff } // n = 7, score = 300 // e8???????? | // 83c418 | add esp, 0x18 // 8bc6 | mov eax, esi // c3 | ret // 55 | push ebp // 8bec | mov ebp, esp // 6aff | push -1 $sequence_3 = { e8???????? 83c408 8b4618 50 895e24 895e28 } // n = 6, score = 300 // e8???????? | // 83c408 | add esp, 8 // 8b4618 | mov eax, dword ptr [esi + 0x18] // 50 | push eax // 895e24 | mov dword ptr [esi + 0x24], ebx // 895e28 | mov dword ptr [esi + 0x28], ebx $sequence_4 = { 52 e8???????? 83c408 8b06 50 895e0c 895e10 } // n = 7, score = 300 // 52 | push edx // e8???????? | // 83c408 | add esp, 8 // 8b06 | mov eax, dword ptr [esi] // 50 | push eax // 895e0c | mov dword ptr [esi + 0xc], ebx // 895e10 | mov dword ptr [esi + 0x10], ebx $sequence_5 = { 4b 81cb00ffffff 43 0fb61403 30142f } // n = 5, score = 300 // 4b | dec ebx // 81cb00ffffff | or ebx, 0xffffff00 // 43 | inc ebx // 0fb61403 | movzx edx, byte ptr [ebx + eax] // 30142f | xor byte ptr [edi + ebp], dl $sequence_6 = { 51 e8???????? 8b560c 52 e8???????? 83c408 8b06 } // n = 7, score = 300 // 51 | push ecx // e8???????? | // 8b560c | mov edx, dword ptr [esi + 0xc] // 52 | push edx // e8???????? | // 83c408 | add esp, 8 // 8b06 | mov eax, dword ptr [esi] $sequence_7 = { 50 895e24 895e28 895e2c e8???????? 8b460c } // n = 6, score = 300 // 50 | push eax // 895e24 | mov dword ptr [esi + 0x24], ebx // 895e28 | mov dword ptr [esi + 0x28], ebx // 895e2c | mov dword ptr [esi + 0x2c], ebx // e8???????? | // 8b460c | mov eax, dword ptr [esi + 0xc] $sequence_8 = { 83c408 8b06 50 895e0c 895e10 895e14 } // n = 6, score = 300 // 83c408 | add esp, 8 // 8b06 | mov eax, dword ptr [esi] // 50 | push eax // 895e0c | mov dword ptr [esi + 0xc], ebx // 895e10 | mov dword ptr [esi + 0x10], ebx // 895e14 | mov dword ptr [esi + 0x14], ebx $sequence_9 = { 68???????? ff15???????? 8d442444 83c0fe 668b4802 83c002 } // n = 6, score = 300 // 68???????? | // ff15???????? | // 8d442444 | lea eax, [esp + 0x44] // 83c0fe | add eax, -2 // 668b4802 | mov cx, word ptr [eax + 2] // 83c002 | add eax, 2 condition: 7 of them and filesize < 1032192 }
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