Actor(s): Silence group
There is no description at this point.
rule win_atmosphere_auto { meta: author = "Felix Bilstein - yara-signator at cocacoding dot com" date = "2023-03-28" version = "1" description = "Detects win.atmosphere." 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.atmosphere" malpedia_rule_date = "20230328" malpedia_hash = "9d2d75cef573c1c2d861f5197df8f563b05a305d" malpedia_version = "20230407" 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 = { 8b5104 8a0402 8b542404 8802 } // n = 4, score = 400 // 8b5104 | mov edx, dword ptr [ecx + 4] // 8a0402 | mov al, byte ptr [edx + eax] // 8b542404 | mov edx, dword ptr [esp + 4] // 8802 | mov byte ptr [edx], al $sequence_1 = { e8???????? 8b4604 85c0 7504 33f6 eb08 } // n = 6, score = 400 // e8???????? | // 8b4604 | mov eax, dword ptr [esi + 4] // 85c0 | test eax, eax // 7504 | jne 6 // 33f6 | xor esi, esi // eb08 | jmp 0xa $sequence_2 = { 8bcc 8965e8 50 51 } // n = 4, score = 400 // 8bcc | mov ecx, esp // 8965e8 | mov dword ptr [ebp - 0x18], esp // 50 | push eax // 51 | push ecx $sequence_3 = { 83ec10 8bc4 89642410 50 e8???????? } // n = 5, score = 400 // 83ec10 | sub esp, 0x10 // 8bc4 | mov eax, esp // 89642410 | mov dword ptr [esp + 0x10], esp // 50 | push eax // e8???????? | $sequence_4 = { ff15???????? 56 8bf8 ff15???????? 83c410 8bc7 5f } // n = 7, score = 400 // ff15???????? | // 56 | push esi // 8bf8 | mov edi, eax // ff15???????? | // 83c410 | add esp, 0x10 // 8bc7 | mov eax, edi // 5f | pop edi $sequence_5 = { 53 8bce 8975e8 8806 ff15???????? } // n = 5, score = 400 // 53 | push ebx // 8bce | mov ecx, esi // 8975e8 | mov dword ptr [ebp - 0x18], esi // 8806 | mov byte ptr [esi], al // ff15???????? | $sequence_6 = { c645fc02 8bcc 8965e8 50 } // n = 4, score = 400 // c645fc02 | mov byte ptr [ebp - 4], 2 // 8bcc | mov ecx, esp // 8965e8 | mov dword ptr [ebp - 0x18], esp // 50 | push eax $sequence_7 = { 53 56 57 8d45e0 8965f0 8bf1 50 } // n = 7, score = 400 // 53 | push ebx // 56 | push esi // 57 | push edi // 8d45e0 | lea eax, [ebp - 0x20] // 8965f0 | mov dword ptr [ebp - 0x10], esp // 8bf1 | mov esi, ecx // 50 | push eax $sequence_8 = { 83ec10 c645fc02 8bcc 8965e8 50 51 e8???????? } // n = 7, score = 400 // 83ec10 | sub esp, 0x10 // c645fc02 | mov byte ptr [ebp - 4], 2 // 8bcc | mov ecx, esp // 8965e8 | mov dword ptr [ebp - 0x18], esp // 50 | push eax // 51 | push ecx // e8???????? | $sequence_9 = { 894114 b001 c20400 8b4114 } // n = 4, score = 400 // 894114 | mov dword ptr [ecx + 0x14], eax // b001 | mov al, 1 // c20400 | ret 4 // 8b4114 | mov eax, dword ptr [ecx + 0x14] condition: 7 of them and filesize < 360448 }
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