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 = "2023-07-11" 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 = "20230705" malpedia_hash = "42d0574f4405bd7d2b154d321d345acb18834a41" malpedia_version = "20230715" 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 = { 8975e4 33c0 39b820ea4000 0f8491000000 } // n = 4, score = 200 // 8975e4 | mov dword ptr [ebp - 0x1c], esi // 33c0 | xor eax, eax // 39b820ea4000 | cmp dword ptr [eax + 0x40ea20], edi // 0f8491000000 | je 0x97 $sequence_1 = { 83c40c 6bc930 8975e0 8db130ea4000 8975e4 eb2b } // n = 6, score = 200 // 83c40c | add esp, 0xc // 6bc930 | imul ecx, ecx, 0x30 // 8975e0 | mov dword ptr [ebp - 0x20], esi // 8db130ea4000 | lea esi, [ecx + 0x40ea30] // 8975e4 | mov dword ptr [ebp - 0x1c], esi // eb2b | jmp 0x2d $sequence_2 = { 0fbe84c158a54000 6a07 c1f804 59 8985a0fdffff 3bc1 } // n = 6, score = 200 // 0fbe84c158a54000 | movsx eax, byte ptr [ecx + eax*8 + 0x40a558] // 6a07 | push 7 // c1f804 | sar eax, 4 // 59 | pop ecx // 8985a0fdffff | mov dword ptr [ebp - 0x260], eax // 3bc1 | cmp eax, ecx $sequence_3 = { 50 ff15???????? 33c9 6a50 894710 66894f0a ffd6 } // n = 7, score = 200 // 50 | push eax // ff15???????? | // 33c9 | xor ecx, ecx // 6a50 | push 0x50 // 894710 | mov dword ptr [edi + 0x10], eax // 66894f0a | mov word ptr [edi + 0xa], cx // ffd6 | call esi $sequence_4 = { 8b4f08 8b4704 51 89442414 } // n = 4, score = 200 // 8b4f08 | mov ecx, dword ptr [edi + 8] // 8b4704 | mov eax, dword ptr [edi + 4] // 51 | push ecx // 89442414 | mov dword ptr [esp + 0x14], eax $sequence_5 = { e8???????? 0fbec0 99 b9ff000000 f7f9 46 88543e27 } // n = 7, score = 200 // e8???????? | // 0fbec0 | movsx eax, al // 99 | cdq // b9ff000000 | mov ecx, 0xff // f7f9 | idiv ecx // 46 | inc esi // 88543e27 | mov byte ptr [esi + edi + 0x27], dl $sequence_6 = { 837c241800 7508 c744241800280000 85f6 } // n = 4, score = 200 // 837c241800 | cmp dword ptr [esp + 0x18], 0 // 7508 | jne 0xa // c744241800280000 | mov dword ptr [esp + 0x18], 0x2800 // 85f6 | test esi, esi $sequence_7 = { eb17 bb00040000 c744241800280000 be3c000000 b8e8030000 8b4c2410 a3???????? } // n = 7, score = 200 // eb17 | jmp 0x19 // bb00040000 | mov ebx, 0x400 // c744241800280000 | mov dword ptr [esp + 0x18], 0x2800 // be3c000000 | mov esi, 0x3c // b8e8030000 | mov eax, 0x3e8 // 8b4c2410 | mov ecx, dword ptr [esp + 0x10] // a3???????? | $sequence_8 = { a3???????? a1???????? c705????????cc424000 8935???????? } // n = 4, score = 200 // a3???????? | // a1???????? | // c705????????cc424000 | // 8935???????? | $sequence_9 = { 8d9b00000000 c60600 e8???????? 99 b9ff000000 } // n = 5, score = 200 // 8d9b00000000 | lea ebx, [ebx] // c60600 | mov byte ptr [esi], 0 // e8???????? | // 99 | cdq // b9ff000000 | mov ecx, 0xff 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 }
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