Actor(s): Comment Crew
There is no description at this point.
rule win_newsreels_auto { meta: author = "Felix Bilstein - yara-signator at cocacoding dot com" date = "2023-12-06" version = "1" description = "Detects win.newsreels." 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.newsreels" 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 = { 7516 39ac247c030000 7d37 5e 5d 83c8ff } // n = 6, score = 100 // 7516 | jne 0x18 // 39ac247c030000 | cmp dword ptr [esp + 0x37c], ebp // 7d37 | jge 0x39 // 5e | pop esi // 5d | pop ebp // 83c8ff | or eax, 0xffffffff $sequence_1 = { 53 53 8d8424e0030000 68???????? 50 66899c24a0000000 c784249c00000001010000 } // n = 7, score = 100 // 53 | push ebx // 53 | push ebx // 8d8424e0030000 | lea eax, [esp + 0x3e0] // 68???????? | // 50 | push eax // 66899c24a0000000 | mov word ptr [esp + 0xa0], bx // c784249c00000001010000 | mov dword ptr [esp + 0x9c], 0x101 $sequence_2 = { ff15???????? e9???????? 6a4d 6a08 68???????? e8???????? 8b35???????? } // n = 7, score = 100 // ff15???????? | // e9???????? | // 6a4d | push 0x4d // 6a08 | push 8 // 68???????? | // e8???????? | // 8b35???????? | $sequence_3 = { 6a4d f2ae f7d1 49 } // n = 4, score = 100 // 6a4d | push 0x4d // f2ae | repne scasb al, byte ptr es:[edi] // f7d1 | not ecx // 49 | dec ecx $sequence_4 = { 8d542460 8d4c2454 83c448 8b02 8b11 3bc2 } // n = 6, score = 100 // 8d542460 | lea edx, [esp + 0x60] // 8d4c2454 | lea ecx, [esp + 0x54] // 83c448 | add esp, 0x48 // 8b02 | mov eax, dword ptr [edx] // 8b11 | mov edx, dword ptr [ecx] // 3bc2 | cmp eax, edx $sequence_5 = { 83c408 85db 750a 5e 5d } // n = 5, score = 100 // 83c408 | add esp, 8 // 85db | test ebx, ebx // 750a | jne 0xc // 5e | pop esi // 5d | pop ebp $sequence_6 = { 33f6 e8???????? 8bd8 83c408 85db 7516 } // n = 6, score = 100 // 33f6 | xor esi, esi // e8???????? | // 8bd8 | mov ebx, eax // 83c408 | add esp, 8 // 85db | test ebx, ebx // 7516 | jne 0x18 $sequence_7 = { 51 e8???????? 8b742430 8b542431 8b442432 81e6ff000000 8b4c2433 } // n = 7, score = 100 // 51 | push ecx // e8???????? | // 8b742430 | mov esi, dword ptr [esp + 0x30] // 8b542431 | mov edx, dword ptr [esp + 0x31] // 8b442432 | mov eax, dword ptr [esp + 0x32] // 81e6ff000000 | and esi, 0xff // 8b4c2433 | mov ecx, dword ptr [esp + 0x33] $sequence_8 = { 8b9c24e0110000 8808 8b15???????? 8bcb 8bc1 } // n = 5, score = 100 // 8b9c24e0110000 | mov ebx, dword ptr [esp + 0x11e0] // 8808 | mov byte ptr [eax], cl // 8b15???????? | // 8bcb | mov ecx, ebx // 8bc1 | mov eax, ecx $sequence_9 = { 51 6a09 6a08 52 66894808 e8???????? } // n = 6, score = 100 // 51 | push ecx // 6a09 | push 9 // 6a08 | push 8 // 52 | push edx // 66894808 | mov word ptr [eax + 8], cx // e8???????? | condition: 7 of them and filesize < 65536 }
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