Actor(s): TeleBots, Sandworm
There is no description at this point.
rule win_telebot_auto { meta: author = "Felix Bilstein - yara-signator at cocacoding dot com" date = "2023-07-11" version = "1" description = "Detects win.telebot." 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.telebot" 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 = { 894c2440 89542408 e8???????? 85c0 89442438 8b4c2440 0f84a7000000 } // n = 7, score = 100 // 894c2440 | mov dword ptr [esp + 0x40], ecx // 89542408 | mov dword ptr [esp + 8], edx // e8???????? | // 85c0 | test eax, eax // 89442438 | mov dword ptr [esp + 0x38], eax // 8b4c2440 | mov ecx, dword ptr [esp + 0x40] // 0f84a7000000 | je 0xad $sequence_1 = { 29c4 8b0404 c744241c00000000 89c5 } // n = 4, score = 100 // 29c4 | sub esp, eax // 8b0404 | mov eax, dword ptr [esp + eax] // c744241c00000000 | mov dword ptr [esp + 0x1c], 0 // 89c5 | mov ebp, eax $sequence_2 = { 72f0 8d442410 c744241020000000 896c2418 c744241410000000 890424 ffd7 } // n = 7, score = 100 // 72f0 | jb 0xfffffff2 // 8d442410 | lea eax, [esp + 0x10] // c744241020000000 | mov dword ptr [esp + 0x10], 0x20 // 896c2418 | mov dword ptr [esp + 0x18], ebp // c744241410000000 | mov dword ptr [esp + 0x14], 0x10 // 890424 | mov dword ptr [esp], eax // ffd7 | call edi $sequence_3 = { 8b5c2420 8b7c2424 8d7368 897c2404 893424 e8???????? 8b442428 } // n = 7, score = 100 // 8b5c2420 | mov ebx, dword ptr [esp + 0x20] // 8b7c2424 | mov edi, dword ptr [esp + 0x24] // 8d7368 | lea esi, [ebx + 0x68] // 897c2404 | mov dword ptr [esp + 4], edi // 893424 | mov dword ptr [esp], esi // e8???????? | // 8b442428 | mov eax, dword ptr [esp + 0x28] $sequence_4 = { e9???????? 8b54243c 8b442424 83e20f c70015000000 895048 } // n = 6, score = 100 // e9???????? | // 8b54243c | mov edx, dword ptr [esp + 0x3c] // 8b442424 | mov eax, dword ptr [esp + 0x24] // 83e20f | and edx, 0xf // c70015000000 | mov dword ptr [eax], 0x15 // 895048 | mov dword ptr [eax + 0x48], edx $sequence_5 = { 0f42c7 89c1 89442420 d3e3 81fb54030000 89d8 } // n = 6, score = 100 // 0f42c7 | cmovb eax, edi // 89c1 | mov ecx, eax // 89442420 | mov dword ptr [esp + 0x20], eax // d3e3 | shl ebx, cl // 81fb54030000 | cmp ebx, 0x354 // 89d8 | mov eax, ebx $sequence_6 = { 895008 89f2 c1ea08 89500c 8b442424 8b5010 f6c602 } // n = 7, score = 100 // 895008 | mov dword ptr [eax + 8], edx // 89f2 | mov edx, esi // c1ea08 | shr edx, 8 // 89500c | mov dword ptr [eax + 0xc], edx // 8b442424 | mov eax, dword ptr [esp + 0x24] // 8b5010 | mov edx, dword ptr [eax + 0x10] // f6c602 | test dh, 2 $sequence_7 = { 31db 8974242c 31f6 90 8b542424 } // n = 5, score = 100 // 31db | xor ebx, ebx // 8974242c | mov dword ptr [esp + 0x2c], esi // 31f6 | xor esi, esi // 90 | nop // 8b542424 | mov edx, dword ptr [esp + 0x24] $sequence_8 = { 8d486c 83c054 8954243c 8b54244c 89442410 8b44243c 894c240c } // n = 7, score = 100 // 8d486c | lea ecx, [eax + 0x6c] // 83c054 | add eax, 0x54 // 8954243c | mov dword ptr [esp + 0x3c], edx // 8b54244c | mov edx, dword ptr [esp + 0x4c] // 89442410 | mov dword ptr [esp + 0x10], eax // 8b44243c | mov eax, dword ptr [esp + 0x3c] // 894c240c | mov dword ptr [esp + 0xc], ecx $sequence_9 = { 8b7638 83f80b 0f859febffff 8b542424 c782c41b0000ffffffff e9???????? 39d3 } // n = 7, score = 100 // 8b7638 | mov esi, dword ptr [esi + 0x38] // 83f80b | cmp eax, 0xb // 0f859febffff | jne 0xffffeba5 // 8b542424 | mov edx, dword ptr [esp + 0x24] // c782c41b0000ffffffff | mov dword ptr [edx + 0x1bc4], 0xffffffff // e9???????? | // 39d3 | cmp ebx, edx condition: 7 of them and filesize < 393216 }
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