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 = "2020-12-22" version = "1" description = "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 = "20201222" malpedia_hash = "30354d830a29f0fbd3714d93d94dea941d77a130" malpedia_version = "20201023" 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 = { e8???????? 83c404 e9???????? 68???????? e8???????? 8b942430510000 } // n = 6, score = 200 // e8???????? | // 83c404 | add esp, 4 // e9???????? | // 68???????? | // e8???????? | // 8b942430510000 | mov edx, dword ptr [esp + 0x5130] $sequence_2 = { 894c2420 89442430 55 894c2428 } // n = 4, score = 200 // 894c2420 | mov dword ptr [esp + 0x20], ecx // 89442430 | mov dword ptr [esp + 0x30], eax // 55 | push ebp // 894c2428 | mov dword ptr [esp + 0x28], ecx $sequence_3 = { ffd6 eb9a b900140000 33c0 8dbc2420010000 f3ab } // n = 6, score = 200 // ffd6 | call esi // eb9a | jmp 0xffffff9c // b900140000 | mov ecx, 0x1400 // 33c0 | xor eax, eax // 8dbc2420010000 | lea edi, [esp + 0x120] // f3ab | rep stosd dword ptr es:[edi], eax $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 = { 8816 46 eb0f 0fb6d2 f682c1c3400004 } // n = 5, score = 200 // 8816 | mov byte ptr [esi], dl // 46 | inc esi // eb0f | jmp 0x11 // 0fb6d2 | movzx edx, dl // f682c1c3400004 | test byte ptr [edx + 0x40c3c1], 4 $sequence_7 = { c3 6a00 6a01 6a02 ff15???????? 85c0 } // n = 6, score = 200 // c3 | ret // 6a00 | push 0 // 6a01 | push 1 // 6a02 | push 2 // ff15???????? | // 85c0 | test eax, eax $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 = { 50 ff15???????? 50 68???????? e8???????? 83c40c e8???????? } // n = 7, score = 200 // 50 | push eax // ff15???????? | // 50 | push eax // 68???????? | // e8???????? | // 83c40c | add esp, 0xc // e8???????? | condition: 7 of them and filesize < 114688 }
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