Actor(s): APT37
There is no description at this point.
rule win_chinotto_auto { meta: author = "Felix Bilstein - yara-signator at cocacoding dot com" date = "2023-01-25" version = "1" description = "Detects win.chinotto." 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.chinotto" 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 = { e9???????? 8d14ff c1e206 03f2 8b5508 33db 89b5ecf5ffff } // n = 7, score = 100 // e9???????? | // 8d14ff | lea edx, [edi + edi*8] // c1e206 | shl edx, 6 // 03f2 | add esi, edx // 8b5508 | mov edx, dword ptr [ebp + 8] // 33db | xor ebx, ebx // 89b5ecf5ffff | mov dword ptr [ebp - 0xa14], esi $sequence_1 = { 761a c7431c02000000 33c0 5f 5e 5b 8b4df8 } // n = 7, score = 100 // 761a | jbe 0x1c // c7431c02000000 | mov dword ptr [ebx + 0x1c], 2 // 33c0 | xor eax, eax // 5f | pop edi // 5e | pop esi // 5b | pop ebx // 8b4df8 | mov ecx, dword ptr [ebp - 8] $sequence_2 = { 898c2448080000 8994244c080000 e8???????? b909000000 be???????? 8dbc2434060000 f3a5 } // n = 7, score = 100 // 898c2448080000 | mov dword ptr [esp + 0x848], ecx // 8994244c080000 | mov dword ptr [esp + 0x84c], edx // e8???????? | // b909000000 | mov ecx, 9 // be???????? | // 8dbc2434060000 | lea edi, [esp + 0x634] // f3a5 | rep movsd dword ptr es:[edi], dword ptr [esi] $sequence_3 = { 03ca bf08000000 894844 095848 3bcf 721d } // n = 6, score = 100 // 03ca | add ecx, edx // bf08000000 | mov edi, 8 // 894844 | mov dword ptr [eax + 0x44], ecx // 095848 | or dword ptr [eax + 0x48], ebx // 3bcf | cmp ecx, edi // 721d | jb 0x1f $sequence_4 = { 8b4e44 33c0 837d0804 0f94c0 d3e0 41 894e44 } // n = 7, score = 100 // 8b4e44 | mov ecx, dword ptr [esi + 0x44] // 33c0 | xor eax, eax // 837d0804 | cmp dword ptr [ebp + 8], 4 // 0f94c0 | sete al // d3e0 | shl eax, cl // 41 | inc ecx // 894e44 | mov dword ptr [esi + 0x44], ecx $sequence_5 = { 83c14c 13c2 85c0 0f87e4000000 7209 83f9ff } // n = 6, score = 100 // 83c14c | add ecx, 0x4c // 13c2 | adc eax, edx // 85c0 | test eax, eax // 0f87e4000000 | ja 0xea // 7209 | jb 0xb // 83f9ff | cmp ecx, -1 $sequence_6 = { 50 8d8de4fbffff 68???????? 51 ffd6 8b95c8f5ffff 52 } // n = 7, score = 100 // 50 | push eax // 8d8de4fbffff | lea ecx, [ebp - 0x41c] // 68???????? | // 51 | push ecx // ffd6 | call esi // 8b95c8f5ffff | mov edx, dword ptr [ebp - 0xa38] // 52 | push edx $sequence_7 = { 6a00 50 c78424240200002f006500 c784242802000064006900 c784242c02000074006f00 c784243002000072002f00 c784243402000063006800 } // n = 7, score = 100 // 6a00 | push 0 // 50 | push eax // c78424240200002f006500 | mov dword ptr [esp + 0x224], 0x65002f // c784242802000064006900 | mov dword ptr [esp + 0x228], 0x690064 // c784242c02000074006f00 | mov dword ptr [esp + 0x22c], 0x6f0074 // c784243002000072002f00 | mov dword ptr [esp + 0x230], 0x2f0072 // c784243402000063006800 | mov dword ptr [esp + 0x234], 0x680063 $sequence_8 = { 52 ffd6 8b85c4f6ffff 50 ffd6 8d4301 5f } // n = 7, score = 100 // 52 | push edx // ffd6 | call esi // 8b85c4f6ffff | mov eax, dword ptr [ebp - 0x93c] // 50 | push eax // ffd6 | call esi // 8d4301 | lea eax, [ebx + 1] // 5f | pop edi $sequence_9 = { 7437 c7473c904b4000 8b463c 50 68???????? 52 8d45fc } // n = 7, score = 100 // 7437 | je 0x39 // c7473c904b4000 | mov dword ptr [edi + 0x3c], 0x404b90 // 8b463c | mov eax, dword ptr [esi + 0x3c] // 50 | push eax // 68???????? | // 52 | push edx // 8d45fc | lea eax, [ebp - 4] condition: 7 of them and filesize < 300032 }
If your designated proposal does not fit in any other category, feel free to write a free-text in the comment field below.
Please propose all changes regarding references on the Malpedia library page
Your suggestion will be reviewed before being published. Thank you for contributing!
YYYY-MM-DD
YYYY-MM
YYYY