Actor(s): DragonOK, Samurai Panda
There is no description at this point.
rule win_isspace_auto { meta: author = "Felix Bilstein - yara-signator at cocacoding dot com" date = "2023-01-25" version = "1" description = "Detects win.isspace." 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.isspace" malpedia_rule_date = "20230124" malpedia_hash = "2ee0eebba83dce3d019a90519f2f972c0fcf9686" malpedia_version = "20230125" 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 = { 8d05171b0000 4c 8d05fc1a0000 48 8d15fd1a0000 48 } // n = 6, score = 200 // 8d05171b0000 | lea eax, [0x1b17] // 4c | dec esp // 8d05fc1a0000 | lea eax, [0x1afc] // 48 | dec eax // 8d15fd1a0000 | lea edx, [0x1afd] // 48 | dec eax $sequence_1 = { 83c9ff 48 8947ff 33c0 48 8dbc2420010000 f2ae } // n = 7, score = 200 // 83c9ff | or ecx, 0xffffffff // 48 | dec eax // 8947ff | mov dword ptr [edi - 1], eax // 33c0 | xor eax, eax // 48 | dec eax // 8dbc2420010000 | lea edi, [esp + 0x120] // f2ae | repne scasb al, byte ptr es:[edi] $sequence_2 = { c701???????? a1???????? 85c0 7409 50 } // n = 5, score = 200 // c701???????? | // a1???????? | // 85c0 | test eax, eax // 7409 | je 0xb // 50 | push eax $sequence_3 = { 48 8b4b18 ff15???????? 83f801 7553 4c } // n = 6, score = 200 // 48 | dec eax // 8b4b18 | mov ecx, dword ptr [ebx + 0x18] // ff15???????? | // 83f801 | cmp eax, 1 // 7553 | jne 0x55 // 4c | dec esp $sequence_4 = { 48 33cc e8???????? 4c 8d9c2440050000 49 8b5b18 } // n = 7, score = 200 // 48 | dec eax // 33cc | xor ecx, esp // e8???????? | // 4c | dec esp // 8d9c2440050000 | lea ebx, [esp + 0x540] // 49 | dec ecx // 8b5b18 | mov ebx, dword ptr [ebx + 0x18] $sequence_5 = { c784248c00000001010000 6689b42490000000 40 88b42420010000 e8???????? 48 } // n = 6, score = 200 // c784248c00000001010000 | mov dword ptr [esp + 0x8c], 0x101 // 6689b42490000000 | mov word ptr [esp + 0x90], si // 40 | inc eax // 88b42420010000 | mov byte ptr [esp + 0x120], dh // e8???????? | // 48 | dec eax $sequence_6 = { c68424d90000006f c68424da0000006d c68424db00000053 c68424dc00000070 c68424dd00000065 } // n = 5, score = 200 // c68424d90000006f | mov byte ptr [esp + 0xd9], 0x6f // c68424da0000006d | mov byte ptr [esp + 0xda], 0x6d // c68424db00000053 | mov byte ptr [esp + 0xdb], 0x53 // c68424dc00000070 | mov byte ptr [esp + 0xdc], 0x70 // c68424dd00000065 | mov byte ptr [esp + 0xdd], 0x65 $sequence_7 = { 89842430010000 48 8bda 83f904 0f85f5000000 48 8d4c2421 } // n = 7, score = 200 // 89842430010000 | mov dword ptr [esp + 0x130], eax // 48 | dec eax // 8bda | mov ebx, edx // 83f904 | cmp ecx, 4 // 0f85f5000000 | jne 0xfb // 48 | dec eax // 8d4c2421 | lea ecx, [esp + 0x21] condition: 7 of them and filesize < 434176 }
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