Actor(s): Cleaver
There is no description at this point.
rule win_synflooder_auto { meta: author = "Felix Bilstein - yara-signator at cocacoding dot com" date = "2023-12-06" version = "1" description = "Detects win.synflooder." 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.synflooder" malpedia_rule_date = "20231130" malpedia_hash = "fc8a0e9f343f6d6ded9e7df1a64dac0cc68d7351" malpedia_version = "20230808" 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 = { ff35???????? ff15???????? 85c0 7442 8b7df4 85ff } // n = 6, score = 200 // ff35???????? | // ff15???????? | // 85c0 | test eax, eax // 7442 | je 0x44 // 8b7df4 | mov edi, dword ptr [ebp - 0xc] // 85ff | test edi, edi $sequence_1 = { 83e61f 8d3c8520fc4000 8b07 c1e606 } // n = 4, score = 200 // 83e61f | and esi, 0x1f // 8d3c8520fc4000 | lea edi, [eax*4 + 0x40fc20] // 8b07 | mov eax, dword ptr [edi] // c1e606 | shl esi, 6 $sequence_2 = { 750b 56 e8???????? 59 85c0 7407 } // n = 6, score = 200 // 750b | jne 0xd // 56 | push esi // e8???????? | // 59 | pop ecx // 85c0 | test eax, eax // 7407 | je 9 $sequence_3 = { e8???????? 83c408 8b542420 52 68???????? e8???????? } // n = 6, score = 200 // e8???????? | // 83c408 | add esp, 8 // 8b542420 | mov edx, dword ptr [esp + 0x20] // 52 | push edx // 68???????? | // e8???????? | $sequence_4 = { 53 56 57 7408 33c0 40 e9???????? } // n = 7, score = 200 // 53 | push ebx // 56 | push esi // 57 | push edi // 7408 | je 0xa // 33c0 | xor eax, eax // 40 | inc eax // e9???????? | $sequence_5 = { c7465c20b04000 83660800 33ff 47 } // n = 4, score = 200 // c7465c20b04000 | mov dword ptr [esi + 0x5c], 0x40b020 // 83660800 | and dword ptr [esi + 8], 0 // 33ff | xor edi, edi // 47 | inc edi $sequence_6 = { 55 8bec 81ec98050000 a1???????? 33c5 8945fc 8d8568faffff } // n = 7, score = 200 // 55 | push ebp // 8bec | mov ebp, esp // 81ec98050000 | sub esp, 0x598 // a1???????? | // 33c5 | xor eax, ebp // 8945fc | mov dword ptr [ebp - 4], eax // 8d8568faffff | lea eax, [ebp - 0x598] $sequence_7 = { 8bf0 89742414 83feff 7524 68???????? e8???????? 83c404 } // n = 7, score = 200 // 8bf0 | mov esi, eax // 89742414 | mov dword ptr [esp + 0x14], esi // 83feff | cmp esi, -1 // 7524 | jne 0x26 // 68???????? | // e8???????? | // 83c404 | add esp, 4 $sequence_8 = { ff15???????? 83f8ff 7524 68???????? e8???????? 83c404 } // n = 6, score = 200 // ff15???????? | // 83f8ff | cmp eax, -1 // 7524 | jne 0x26 // 68???????? | // e8???????? | // 83c404 | add esp, 4 $sequence_9 = { 33db 85db 7466 8d45f4 50 ff75f8 53 } // n = 7, score = 200 // 33db | xor ebx, ebx // 85db | test ebx, ebx // 7466 | je 0x68 // 8d45f4 | lea eax, [ebp - 0xc] // 50 | push eax // ff75f8 | push dword ptr [ebp - 8] // 53 | push ebx condition: 7 of them and filesize < 163840 }
rule win_synflooder_w0 { meta: description = "Malware or hack tool used by attackers in Operation Cleaver" reference = "http://cylance.com/assets/Cleaver/Cylance_Operation_Cleaver_Report.pdf" date = "2014/12/02" author = "Cylance Inc." malpedia_reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.synflooder" malpedia_version = "20170521" malpedia_license = "CC BY-NC-SA 4.0" malpedia_sharing = "TLP:WHITE" strings: $s1 = "Unable to resolve [ %s ]. ErrorCode %d" $s2 = "your target’s IP is : %s" $s3 = "Raw TCP Socket Created successfully." condition: all of them }
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