Actor(s): TeleBots
There is no description at this point.
rule win_exaramel_auto { meta: author = "Felix Bilstein - yara-signator at cocacoding dot com" date = "2023-07-11" version = "1" description = "Detects win.exaramel." 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.exaramel" 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 = { 8d45ec c745ec00000000 50 ff7508 57 e8???????? } // n = 6, score = 100 // 8d45ec | lea eax, [ebp - 0x14] // c745ec00000000 | mov dword ptr [ebp - 0x14], 0 // 50 | push eax // ff7508 | push dword ptr [ebp + 8] // 57 | push edi // e8???????? | $sequence_1 = { e8???????? ff75f8 e8???????? 8b06 83c410 } // n = 5, score = 100 // e8???????? | // ff75f8 | push dword ptr [ebp - 8] // e8???????? | // 8b06 | mov eax, dword ptr [esi] // 83c410 | add esp, 0x10 $sequence_2 = { b801000000 68f0030000 0f42f0 8d45f4 50 57 } // n = 6, score = 100 // b801000000 | mov eax, 1 // 68f0030000 | push 0x3f0 // 0f42f0 | cmovb esi, eax // 8d45f4 | lea eax, [ebp - 0xc] // 50 | push eax // 57 | push edi $sequence_3 = { 8b01 51 8b4008 ffd0 a1???????? } // n = 5, score = 100 // 8b01 | mov eax, dword ptr [ecx] // 51 | push ecx // 8b4008 | mov eax, dword ptr [eax + 8] // ffd0 | call eax // a1???????? | $sequence_4 = { 6bf630 8b04bd60dd4100 f644302880 741f e8???????? } // n = 5, score = 100 // 6bf630 | imul esi, esi, 0x30 // 8b04bd60dd4100 | mov eax, dword ptr [edi*4 + 0x41dd60] // f644302880 | test byte ptr [eax + esi + 0x28], 0x80 // 741f | je 0x21 // e8???????? | $sequence_5 = { 50 ff15???????? 85c0 7527 56 6a00 } // n = 6, score = 100 // 50 | push eax // ff15???????? | // 85c0 | test eax, eax // 7527 | jne 0x29 // 56 | push esi // 6a00 | push 0 $sequence_6 = { 85f6 7425 8d4e02 51 e8???????? 8b4d0c } // n = 6, score = 100 // 85f6 | test esi, esi // 7425 | je 0x27 // 8d4e02 | lea ecx, [esi + 2] // 51 | push ecx // e8???????? | // 8b4d0c | mov ecx, dword ptr [ebp + 0xc] $sequence_7 = { ff15???????? 85c0 740a 6a01 e8???????? 83c404 } // n = 6, score = 100 // ff15???????? | // 85c0 | test eax, eax // 740a | je 0xc // 6a01 | push 1 // e8???????? | // 83c404 | add esp, 4 $sequence_8 = { ff35???????? c705????????00000000 c705????????01000000 c705????????00000000 c705????????03000000 ff15???????? 8b4dfc } // n = 7, score = 100 // ff35???????? | // c705????????00000000 | // c705????????01000000 | // c705????????00000000 | // c705????????03000000 | // ff15???????? | // 8b4dfc | mov ecx, dword ptr [ebp - 4] $sequence_9 = { ffd0 894508 8b7de4 85ff 741a 8b75dc 8b1d???????? } // n = 7, score = 100 // ffd0 | call eax // 894508 | mov dword ptr [ebp + 8], eax // 8b7de4 | mov edi, dword ptr [ebp - 0x1c] // 85ff | test edi, edi // 741a | je 0x1c // 8b75dc | mov esi, dword ptr [ebp - 0x24] // 8b1d???????? | condition: 7 of them and filesize < 294912 }
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