Actor(s): GALLIUM, UPS
There is no description at this point.
rule win_htran_auto { meta: author = "Felix Bilstein - yara-signator at cocacoding dot com" date = "2023-01-25" version = "1" description = "Detects win.htran." 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.htran" 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 = { 8b842440510000 55 50 53 e8???????? 83c420 85c0 } // n = 7, score = 200 // 8b842440510000 | mov eax, dword ptr [esp + 0x5140] // 55 | push ebp // 50 | push eax // 53 | push ebx // e8???????? | // 83c420 | add esp, 0x20 // 85c0 | test eax, eax $sequence_1 = { 33c9 894c2414 53 8b10 8b4004 } // n = 5, score = 200 // 33c9 | xor ecx, ecx // 894c2414 | mov dword ptr [esp + 0x14], ecx // 53 | push ebx // 8b10 | mov edx, dword ptr [eax] // 8b4004 | mov eax, dword ptr [eax + 4] $sequence_2 = { 83c408 a1???????? 85c0 7405 } // n = 4, score = 200 // 83c408 | add esp, 8 // a1???????? | // 85c0 | test eax, eax // 7405 | je 7 $sequence_3 = { 51 e8???????? 8b570c 8be8 52 e8???????? } // n = 6, score = 200 // 51 | push ecx // e8???????? | // 8b570c | mov edx, dword ptr [edi + 0xc] // 8be8 | mov ebp, eax // 52 | push edx // e8???????? | $sequence_4 = { 6a01 58 c20400 8b542404 } // n = 4, score = 200 // 6a01 | push 1 // 58 | pop eax // c20400 | ret 4 // 8b542404 | mov edx, dword ptr [esp + 4] $sequence_5 = { 8b8424e0420100 33c9 894c2414 53 8b10 } // n = 5, score = 200 // 8b8424e0420100 | mov eax, dword ptr [esp + 0x142e0] // 33c9 | xor ecx, ecx // 894c2414 | mov dword ptr [esp + 0x14], ecx // 53 | push ebx // 8b10 | mov edx, dword ptr [eax] $sequence_6 = { 68???????? e8???????? 83c404 33c0 c3 83ec14 8b4c241c } // n = 7, score = 200 // 68???????? | // e8???????? | // 83c404 | add esp, 4 // 33c0 | xor eax, eax // c3 | ret // 83ec14 | sub esp, 0x14 // 8b4c241c | mov ecx, dword ptr [esp + 0x1c] $sequence_7 = { 8bcb c1f805 83e11f 8b048500c54000 8d04c8 eb05 b8???????? } // n = 7, score = 200 // 8bcb | mov ecx, ebx // c1f805 | sar eax, 5 // 83e11f | and ecx, 0x1f // 8b048500c54000 | mov eax, dword ptr [eax*4 + 0x40c500] // 8d04c8 | lea eax, [eax + ecx*8] // eb05 | jmp 7 // b8???????? | $sequence_8 = { 33c0 8dbc24ec520000 f3ab 8d9424e4000000 52 53 } // n = 6, score = 200 // 33c0 | xor eax, eax // 8dbc24ec520000 | lea edi, [esp + 0x52ec] // f3ab | rep stosd dword ptr es:[edi], eax // 8d9424e4000000 | lea edx, [esp + 0xe4] // 52 | push edx // 53 | push ebx $sequence_9 = { ff15???????? ebb6 6a00 8d8c2424010000 6800500000 } // n = 5, score = 200 // ff15???????? | // ebb6 | jmp 0xffffffb8 // 6a00 | push 0 // 8d8c2424010000 | lea ecx, [esp + 0x124] // 6800500000 | push 0x5000 condition: 7 of them and filesize < 114688 }
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