Actor(s): Operation ShadowHammer
There is no description at this point.
rule win_shadowhammer_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.shadowhammer" 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 = { c745a409da9df3 c745a8a050afad c745ac0df0ef96 c745b03b41b6e2 33c0 } // n = 5, score = 100 // c745a409da9df3 | mov dword ptr [ebp - 0x5c], 0xf39dda09 // c745a8a050afad | mov dword ptr [ebp - 0x58], 0xadaf50a0 // c745ac0df0ef96 | mov dword ptr [ebp - 0x54], 0x96eff00d // c745b03b41b6e2 | mov dword ptr [ebp - 0x50], 0xe2b6413b // 33c0 | xor eax, eax $sequence_1 = { 3bfe 72f1 833d????????00 5f 5e 741b 68b4a84000 } // n = 7, score = 100 // 3bfe | cmp edi, esi // 72f1 | jb 0xfffffff3 // 833d????????00 | // 5f | pop edi // 5e | pop esi // 741b | je 0x1d // 68b4a84000 | push 0x40a8b4 $sequence_2 = { c3 6a20 68f0884000 e8???????? 6a08 } // n = 5, score = 100 // c3 | ret // 6a20 | push 0x20 // 68f0884000 | push 0x4088f0 // e8???????? | // 6a08 | push 8 $sequence_3 = { 83c104 2bc1 8945f4 eb03 8b45f4 ff3430 } // n = 6, score = 100 // 83c104 | add ecx, 4 // 2bc1 | sub eax, ecx // 8945f4 | mov dword ptr [ebp - 0xc], eax // eb03 | jmp 5 // 8b45f4 | mov eax, dword ptr [ebp - 0xc] // ff3430 | push dword ptr [eax + esi] $sequence_4 = { 68287c4000 57 ffd6 681c7c4000 57 a3???????? ffd6 } // n = 7, score = 100 // 68287c4000 | push 0x407c28 // 57 | push edi // ffd6 | call esi // 681c7c4000 | push 0x407c1c // 57 | push edi // a3???????? | // ffd6 | call esi $sequence_5 = { 752c 57 8d8530fbffff 50 8d8538fdffff 50 } // n = 6, score = 100 // 752c | jne 0x2e // 57 | push edi // 8d8530fbffff | lea eax, [ebp - 0x4d0] // 50 | push eax // 8d8538fdffff | lea eax, [ebp - 0x2c8] // 50 | push eax $sequence_6 = { 33c0 ebf7 55 8bec 83ec78 53 } // n = 6, score = 100 // 33c0 | xor eax, eax // ebf7 | jmp 0xfffffff9 // 55 | push ebp // 8bec | mov ebp, esp // 83ec78 | sub esp, 0x78 // 53 | push ebx $sequence_7 = { 6800100000 ff75fc 53 ff5604 8bf8 } // n = 5, score = 100 // 6800100000 | push 0x1000 // ff75fc | push dword ptr [ebp - 4] // 53 | push ebx // ff5604 | call dword ptr [esi + 4] // 8bf8 | mov edi, eax $sequence_8 = { 8d4588 50 ff5634 6a06 } // n = 4, score = 100 // 8d4588 | lea eax, [ebp - 0x78] // 50 | push eax // ff5634 | call dword ptr [esi + 0x34] // 6a06 | push 6 $sequence_9 = { be50904000 57 8b3e 85ff } // n = 4, score = 100 // be50904000 | mov esi, 0x409050 // 57 | push edi // 8b3e | mov edi, dword ptr [esi] // 85ff | test edi, edi condition: 7 of them and filesize < 49152 }
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