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 = "2023-12-06" 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 = "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 = { 89442408 891c24 e8???????? 891c24 e8???????? 807c03ff5c } // n = 6, score = 100 // 89442408 | mov dword ptr [esp + 8], eax // 891c24 | mov dword ptr [esp], ebx // e8???????? | // 891c24 | mov dword ptr [esp], ebx // e8???????? | // 807c03ff5c | cmp byte ptr [ebx + eax - 1], 0x5c $sequence_1 = { 8d9730050000 89542450 8d97f0020000 89ef 89dd 89f3 89ce } // n = 7, score = 100 // 8d9730050000 | lea edx, [edi + 0x530] // 89542450 | mov dword ptr [esp + 0x50], edx // 8d97f0020000 | lea edx, [edi + 0x2f0] // 89ef | mov edi, ebp // 89dd | mov ebp, ebx // 89f3 | mov ebx, esi // 89ce | mov esi, ecx $sequence_2 = { 895638 0f868d010000 83e908 8d442418 c1e903 8d7101 8d0c30 } // n = 7, score = 100 // 895638 | mov dword ptr [esi + 0x38], edx // 0f868d010000 | jbe 0x193 // 83e908 | sub ecx, 8 // 8d442418 | lea eax, [esp + 0x18] // c1e903 | shr ecx, 3 // 8d7101 | lea esi, [ecx + 1] // 8d0c30 | lea ecx, [eax + esi] $sequence_3 = { a3???????? 0f85f3fcffff c70424???????? e8???????? b8ffffffff ebc9 c7442404???????? } // n = 7, score = 100 // a3???????? | // 0f85f3fcffff | jne 0xfffffcf9 // c70424???????? | // e8???????? | // b8ffffffff | mov eax, 0xffffffff // ebc9 | jmp 0xffffffcb // c7442404???????? | $sequence_4 = { 31c0 c7463000000000 39ca 7796 eb99 } // n = 5, score = 100 // 31c0 | xor eax, eax // c7463000000000 | mov dword ptr [esi + 0x30], 0 // 39ca | cmp edx, ecx // 7796 | ja 0xffffff98 // eb99 | jmp 0xffffff9b $sequence_5 = { 83ef01 d3e0 83c108 01c6 8b442440 } // n = 5, score = 100 // 83ef01 | sub edi, 1 // d3e0 | shl eax, cl // 83c108 | add ecx, 8 // 01c6 | add esi, eax // 8b442440 | mov eax, dword ptr [esp + 0x40] $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 = { e8???????? 893424 89c3 89442404 ff15???????? 83ec08 89c7 } // n = 7, score = 100 // e8???????? | // 893424 | mov dword ptr [esp], esi // 89c3 | mov ebx, eax // 89442404 | mov dword ptr [esp + 4], eax // ff15???????? | // 83ec08 | sub esp, 8 // 89c7 | mov edi, eax $sequence_8 = { 76e2 eb15 8b442424 8b5010 f6c604 } // n = 5, score = 100 // 76e2 | jbe 0xffffffe4 // eb15 | jmp 0x17 // 8b442424 | mov eax, dword ptr [esp + 0x24] // 8b5010 | mov edx, dword ptr [eax + 0x10] // f6c604 | test dh, 4 $sequence_9 = { 89ef 89dd 89f3 89ce 8954244c 83f81e 0f876c160000 } // n = 7, score = 100 // 89ef | mov edi, ebp // 89dd | mov ebp, ebx // 89f3 | mov ebx, esi // 89ce | mov esi, ecx // 8954244c | mov dword ptr [esp + 0x4c], edx // 83f81e | cmp eax, 0x1e // 0f876c160000 | ja 0x1672 condition: 7 of them and filesize < 393216 }
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