Actor(s): Lazarus Group
There is no description at this point.
rule win_dyepack_auto { meta: author = "Felix Bilstein - yara-signator at cocacoding dot com" date = "2020-12-22" version = "1" description = "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.dyepack" malpedia_rule_date = "20201222" malpedia_hash = "30354d830a29f0fbd3714d93d94dea941d77a130" malpedia_version = "20201023" 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 = { 52 8d44242c 51 50 56 ff15???????? 85c0 } // n = 7, score = 300 // 52 | push edx // 8d44242c | lea eax, [esp + 0x2c] // 51 | push ecx // 50 | push eax // 56 | push esi // ff15???????? | // 85c0 | test eax, eax $sequence_1 = { 53 52 8d44242c 51 50 56 ff15???????? } // n = 7, score = 300 // 53 | push ebx // 52 | push edx // 8d44242c | lea eax, [esp + 0x2c] // 51 | push ecx // 50 | push eax // 56 | push esi // ff15???????? | $sequence_2 = { 50 ff15???????? 8bf0 83feff 7510 ff15???????? } // n = 6, score = 300 // 50 | push eax // ff15???????? | // 8bf0 | mov esi, eax // 83feff | cmp esi, -1 // 7510 | jne 0x12 // ff15???????? | $sequence_3 = { 53 aa 8b842434100000 53 6800000040 50 ff15???????? } // n = 7, score = 300 // 53 | push ebx // aa | stosb byte ptr es:[edi], al // 8b842434100000 | mov eax, dword ptr [esp + 0x1034] // 53 | push ebx // 6800000040 | push 0x40000000 // 50 | push eax // ff15???????? | $sequence_4 = { 56 ffd7 8d4c2418 53 51 8d54242c } // n = 6, score = 300 // 56 | push esi // ffd7 | call edi // 8d4c2418 | lea ecx, [esp + 0x18] // 53 | push ebx // 51 | push ecx // 8d54242c | lea edx, [esp + 0x2c] $sequence_5 = { ffd7 8d4c2418 53 51 } // n = 4, score = 300 // ffd7 | call edi // 8d4c2418 | lea ecx, [esp + 0x18] // 53 | push ebx // 51 | push ecx $sequence_6 = { 760b b900100000 895c2420 eb04 89442420 8d542418 } // n = 6, score = 300 // 760b | jbe 0xd // b900100000 | mov ecx, 0x1000 // 895c2420 | mov dword ptr [esp + 0x20], ebx // eb04 | jmp 6 // 89442420 | mov dword ptr [esp + 0x20], eax // 8d542418 | lea edx, [esp + 0x18] $sequence_7 = { eb04 8b4c2410 2bcd 1bc7 } // n = 4, score = 300 // eb04 | jmp 6 // 8b4c2410 | mov ecx, dword ptr [esp + 0x10] // 2bcd | sub ecx, ebp // 1bc7 | sbb eax, edi $sequence_8 = { 7f08 8b4c2410 3be9 72ac 56 ff15???????? 56 } // n = 7, score = 300 // 7f08 | jg 0xa // 8b4c2410 | mov ecx, dword ptr [esp + 0x10] // 3be9 | cmp ebp, ecx // 72ac | jb 0xffffffae // 56 | push esi // ff15???????? | // 56 | push esi $sequence_9 = { 2bcd 1bc7 7815 7f08 81f900100000 760b } // n = 6, score = 300 // 2bcd | sub ecx, ebp // 1bc7 | sbb eax, edi // 7815 | js 0x17 // 7f08 | jg 0xa // 81f900100000 | cmp ecx, 0x1000 // 760b | jbe 0xd condition: 7 of them and filesize < 212992 }
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