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 = "2022-04-08" 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 = "20220405" malpedia_hash = "ecd38294bd47d5589be5cd5490dc8bb4804afc2a" malpedia_version = "20220411" 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 = { 6a00 6a23 eb04 6a00 6a2b 68???????? } // n = 6, score = 200 // 6a00 | push 0 // 6a23 | push 0x23 // eb04 | jmp 6 // 6a00 | push 0 // 6a2b | push 0x2b // 68???????? | $sequence_1 = { 68???????? 64a100000000 50 81eca8000000 a1???????? 3145f8 } // n = 6, score = 200 // 68???????? | // 64a100000000 | mov eax, dword ptr fs:[0] // 50 | push eax // 81eca8000000 | sub esp, 0xa8 // a1???????? | // 3145f8 | xor dword ptr [ebp - 8], eax $sequence_2 = { 64a300000000 8965e8 c745fc00000000 ff15???????? } // n = 4, score = 200 // 64a300000000 | mov dword ptr fs:[0], eax // 8965e8 | mov dword ptr [ebp - 0x18], esp // c745fc00000000 | mov dword ptr [ebp - 4], 0 // ff15???????? | $sequence_3 = { 6a00 6800010000 53 6aff } // n = 4, score = 200 // 6a00 | push 0 // 6800010000 | push 0x100 // 53 | push ebx // 6aff | push -1 $sequence_4 = { a3???????? e8???????? 6800200300 a3???????? e8???????? 6800200300 a3???????? } // n = 7, score = 200 // a3???????? | // e8???????? | // 6800200300 | push 0x32000 // a3???????? | // e8???????? | // 6800200300 | push 0x32000 // a3???????? | $sequence_5 = { c745fc00000000 8d8548ffffff 50 ff15???????? } // n = 4, score = 200 // c745fc00000000 | mov dword ptr [ebp - 4], 0 // 8d8548ffffff | lea eax, dword ptr [ebp - 0xb8] // 50 | push eax // ff15???????? | $sequence_6 = { 8bf1 6a00 56 e8???????? 6800010000 } // n = 5, score = 200 // 8bf1 | mov esi, ecx // 6a00 | push 0 // 56 | push esi // e8???????? | // 6800010000 | push 0x100 $sequence_7 = { 68???????? 68???????? 68???????? 53 ff15???????? 8bf0 } // n = 6, score = 200 // 68???????? | // 68???????? | // 68???????? | // 53 | push ebx // ff15???????? | // 8bf0 | mov esi, eax condition: 7 of them and filesize < 434176 }
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