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 = "2023-01-25" 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 = "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 = { c7442404???????? 893424 ffd3 83ec08 85c0 a3???????? 0f84ff040000 } // n = 7, score = 100 // c7442404???????? | // 893424 | mov dword ptr [esp], esi // ffd3 | call ebx // 83ec08 | sub esp, 8 // 85c0 | test eax, eax // a3???????? | // 0f84ff040000 | je 0x505 $sequence_1 = { 01c6 83f91f 76e2 89cb 8b442424 39701c 0f849d0c0000 } // n = 7, score = 100 // 01c6 | add esi, eax // 83f91f | cmp ecx, 0x1f // 76e2 | jbe 0xffffffe4 // 89cb | mov ebx, ecx // 8b442424 | mov eax, dword ptr [esp + 0x24] // 39701c | cmp dword ptr [eax + 0x1c], esi // 0f849d0c0000 | je 0xca3 $sequence_2 = { 7594 897c2404 c70424???????? e8???????? eb93 31c0 83c42c } // n = 7, score = 100 // 7594 | jne 0xffffff96 // 897c2404 | mov dword ptr [esp + 4], edi // c70424???????? | // e8???????? | // eb93 | jmp 0xffffff95 // 31c0 | xor eax, eax // 83c42c | add esp, 0x2c $sequence_3 = { c7401400800000 c7402000000000 c7403800000000 c7403c00000000 89506c 895050 89504c } // n = 7, score = 100 // c7401400800000 | mov dword ptr [eax + 0x14], 0x8000 // c7402000000000 | mov dword ptr [eax + 0x20], 0 // c7403800000000 | mov dword ptr [eax + 0x38], 0 // c7403c00000000 | mov dword ptr [eax + 0x3c], 0 // 89506c | mov dword ptr [eax + 0x6c], edx // 895050 | mov dword ptr [eax + 0x50], edx // 89504c | mov dword ptr [eax + 0x4c], edx $sequence_4 = { c74424043c000000 8d7c241c 8b03 890424 e8???????? 8b03 c744240801000000 } // n = 7, score = 100 // c74424043c000000 | mov dword ptr [esp + 4], 0x3c // 8d7c241c | lea edi, [esp + 0x1c] // 8b03 | mov eax, dword ptr [ebx] // 890424 | mov dword ptr [esp], eax // e8???????? | // 8b03 | mov eax, dword ptr [ebx] // c744240801000000 | mov dword ptr [esp + 8], 1 $sequence_5 = { e9???????? 8b44241c 29c8 03442438 39ce } // n = 5, score = 100 // e9???????? | // 8b44241c | mov eax, dword ptr [esp + 0x1c] // 29c8 | sub eax, ecx // 03442438 | add eax, dword ptr [esp + 0x38] // 39ce | cmp esi, ecx $sequence_6 = { 0f84c8050000 c7442404???????? 893424 ffd3 83ec08 85c0 a3???????? } // n = 7, score = 100 // 0f84c8050000 | je 0x5ce // c7442404???????? | // 893424 | mov dword ptr [esp], esi // ffd3 | call ebx // 83ec08 | sub esp, 8 // 85c0 | test eax, eax // a3???????? | $sequence_7 = { 8d8a0f00ffff 81faf1ff0000 0f43d1 83c43c c1e210 5b 09d0 } // n = 7, score = 100 // 8d8a0f00ffff | lea ecx, [edx - 0xfff1] // 81faf1ff0000 | cmp edx, 0xfff1 // 0f43d1 | cmovae edx, ecx // 83c43c | add esp, 0x3c // c1e210 | shl edx, 0x10 // 5b | pop ebx // 09d0 | or eax, edx $sequence_8 = { 01ca 031424 03542424 03542428 01da 0154242c 3b442430 } // n = 7, score = 100 // 01ca | add edx, ecx // 031424 | add edx, dword ptr [esp] // 03542424 | add edx, dword ptr [esp + 0x24] // 03542428 | add edx, dword ptr [esp + 0x28] // 01da | add edx, ebx // 0154242c | add dword ptr [esp + 0x2c], edx // 3b442430 | cmp eax, dword ptr [esp + 0x30] $sequence_9 = { 01d6 39c8 77e3 89d8 896c2444 89cb 89c1 } // n = 7, score = 100 // 01d6 | add esi, edx // 39c8 | cmp eax, ecx // 77e3 | ja 0xffffffe5 // 89d8 | mov eax, ebx // 896c2444 | mov dword ptr [esp + 0x44], ebp // 89cb | mov ebx, ecx // 89c1 | mov ecx, eax condition: 7 of them and filesize < 393216 }
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