rule win_tinynuke_auto { meta: author = "Felix Bilstein - yara-signator at cocacoding dot com" date = "2026-09-17" version = "1" description = "Detects win.tinynuke." 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.tinynuke" malpedia_rule_date = "20260916" malpedia_hash = "53a643781c18e08f4a50949af60172d837a0b6f6" malpedia_version = "20260917" 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 = { c3 55 8bec 817d0c00040000 } // n = 4, score = 1600 // c3 | ret // 55 | push ebp // 8bec | mov ebp, esp // 817d0c00040000 | cmp dword ptr [ebp + 0xc], 0x400 $sequence_1 = { 50 ff750c 57 56 ff15???????? 56 } // n = 6, score = 1400 // 50 | push eax // ff750c | push dword ptr [ebp + 0xc] // 57 | push edi // 56 | push esi // ff15???????? | // 56 | push esi $sequence_2 = { f7f1 8a043a 30041e 46 3b750c 72e5 5f } // n = 7, score = 1400 // f7f1 | div ecx // 8a043a | mov al, byte ptr [edx + edi] // 30041e | xor byte ptr [esi + ebx], al // 46 | inc esi // 3b750c | cmp esi, dword ptr [ebp + 0xc] // 72e5 | jb 0xffffffe7 // 5f | pop edi $sequence_3 = { 8d8530f6ffff 50 6802020000 ff15???????? } // n = 4, score = 1400 // 8d8530f6ffff | lea eax, [ebp - 0x9d0] // 50 | push eax // 6802020000 | push 0x202 // ff15???????? | $sequence_4 = { 8945f4 8d85d4feffff 50 ff15???????? } // n = 4, score = 1400 // 8945f4 | mov dword ptr [ebp - 0xc], eax // 8d85d4feffff | lea eax, [ebp - 0x12c] // 50 | push eax // ff15???????? | $sequence_5 = { ff35???????? c745f803000000 ff75fc ff15???????? ff75fc } // n = 5, score = 1400 // ff35???????? | // c745f803000000 | mov dword ptr [ebp - 8], 3 // ff75fc | push dword ptr [ebp - 4] // ff15???????? | // ff75fc | push dword ptr [ebp - 4] $sequence_6 = { 8bec 817d0c00040000 7613 8b4508 } // n = 4, score = 1400 // 8bec | mov ebp, esp // 817d0c00040000 | cmp dword ptr [ebp + 0xc], 0x400 // 7613 | jbe 0x15 // 8b4508 | mov eax, dword ptr [ebp + 8] $sequence_7 = { ff7508 ff15???????? 53 8bf0 8d45fc 50 ff750c } // n = 7, score = 1400 // ff7508 | push dword ptr [ebp + 8] // ff15???????? | // 53 | push ebx // 8bf0 | mov esi, eax // 8d45fc | lea eax, [ebp - 4] // 50 | push eax // ff750c | push dword ptr [ebp + 0xc] $sequence_8 = { ff75ec ff75fc e8???????? 83c40c 5f } // n = 5, score = 1300 // ff75ec | push dword ptr [ebp - 0x14] // ff75fc | push dword ptr [ebp - 4] // e8???????? | // 83c40c | add esp, 0xc // 5f | pop edi $sequence_9 = { ff15???????? ff35???????? 8d85a4feffff 50 ff15???????? } // n = 5, score = 1300 // ff15???????? | // ff35???????? | // 8d85a4feffff | lea eax, [ebp - 0x15c] // 50 | push eax // ff15???????? | $sequence_10 = { e8???????? eb18 83f803 7519 } // n = 4, score = 800 // e8???????? | // eb18 | jmp 0x1a // 83f803 | cmp eax, 3 // 7519 | jne 0x1b $sequence_11 = { ff15???????? a3???????? ff35???????? ff75ec } // n = 4, score = 800 // ff15???????? | // a3???????? | // ff35???????? | // ff75ec | push dword ptr [ebp - 0x14] $sequence_12 = { 8a00 3c0a 7409 3c0d } // n = 4, score = 800 // 8a00 | mov al, byte ptr [eax] // 3c0a | cmp al, 0xa // 7409 | je 0xb // 3c0d | cmp al, 0xd $sequence_13 = { a3???????? 68e2010000 68???????? 68???????? e8???????? } // n = 5, score = 800 // a3???????? | // 68e2010000 | push 0x1e2 // 68???????? | // 68???????? | // e8???????? | $sequence_14 = { 6a2a 50 8945fc ff15???????? } // n = 4, score = 800 // 6a2a | push 0x2a // 50 | push eax // 8945fc | mov dword ptr [ebp - 4], eax // ff15???????? | $sequence_15 = { a3???????? ff35???????? ff75f8 ff15???????? } // n = 4, score = 800 // a3???????? | // ff35???????? | // ff75f8 | push dword ptr [ebp - 8] // ff15???????? | $sequence_16 = { 59 a3???????? c9 c3 55 } // n = 5, score = 800 // 59 | pop ecx // a3???????? | // c9 | leave // c3 | ret // 55 | push ebp $sequence_17 = { ff15???????? ff75fc 8d85f0fdffff 50 e8???????? 59 50 } // n = 7, score = 700 // ff15???????? | // ff75fc | push dword ptr [ebp - 4] // 8d85f0fdffff | lea eax, [ebp - 0x210] // 50 | push eax // e8???????? | // 59 | pop ecx // 50 | push eax $sequence_18 = { 50 8d85f0fdffff 50 ff15???????? ff75fc 8d85f0fdffff } // n = 6, score = 700 // 50 | push eax // 8d85f0fdffff | lea eax, [ebp - 0x210] // 50 | push eax // ff15???????? | // ff75fc | push dword ptr [ebp - 4] // 8d85f0fdffff | lea eax, [ebp - 0x210] $sequence_19 = { 6800000080 8d85d8feffff 50 ff15???????? a3???????? } // n = 5, score = 700 // 6800000080 | push 0x80000000 // 8d85d8feffff | lea eax, [ebp - 0x128] // 50 | push eax // ff15???????? | // a3???????? | $sequence_20 = { ff15???????? 8b35???????? 8d430c 50 } // n = 4, score = 200 // ff15???????? | // 8b35???????? | // 8d430c | lea eax, [ebx + 0xc] // 50 | push eax $sequence_21 = { 61 8b8decfeffff 8b95e8feffff 038dd0feffff } // n = 4, score = 100 // 61 | popal // 8b8decfeffff | mov ecx, dword ptr [ebp - 0x114] // 8b95e8feffff | mov edx, dword ptr [ebp - 0x118] // 038dd0feffff | add ecx, dword ptr [ebp - 0x130] $sequence_22 = { 85c9 0fb7d1 893424 0f48c2 83c704 } // n = 5, score = 100 // 85c9 | test ecx, ecx // 0fb7d1 | movzx edx, cx // 893424 | mov dword ptr [esp], esi // 0f48c2 | cmovs eax, edx // 83c704 | add edi, 4 $sequence_23 = { e8???????? 83ec04 c7442404???????? 890424 e8???????? 83ec08 89c3 } // n = 7, score = 100 // e8???????? | // 83ec04 | sub esp, 4 // c7442404???????? | // 890424 | mov dword ptr [esp], eax // e8???????? | // 83ec08 | sub esp, 8 // 89c3 | mov ebx, eax $sequence_24 = { 83c404 85c0 0f847c010000 5f 5e 5b } // n = 6, score = 100 // 83c404 | add esp, 4 // 85c0 | test eax, eax // 0f847c010000 | je 0x182 // 5f | pop edi // 5e | pop esi // 5b | pop ebx $sequence_25 = { 85d2 7449 8b4604 83f807 7639 } // n = 5, score = 100 // 85d2 | test edx, edx // 7449 | je 0x4b // 8b4604 | mov eax, dword ptr [esi + 4] // 83f807 | cmp eax, 7 // 7639 | jbe 0x3b $sequence_26 = { 0f48c2 83c704 83c504 89442404 e8???????? 8945fc 8b0f } // n = 7, score = 100 // 0f48c2 | cmovs eax, edx // 83c704 | add edi, 4 // 83c504 | add ebp, 4 // 89442404 | mov dword ptr [esp + 4], eax // e8???????? | // 8945fc | mov dword ptr [ebp - 4], eax // 8b0f | mov ecx, dword ptr [edi] $sequence_27 = { 740c 83c438 b801000000 5b } // n = 4, score = 100 // 740c | je 0xe // 83c438 | add esp, 0x38 // b801000000 | mov eax, 1 // 5b | pop ebx $sequence_28 = { 05???????? 89c7 8944241c 8b4050 8db708010000 890424 89442418 } // n = 7, score = 100 // 05???????? | // 89c7 | mov edi, eax // 8944241c | mov dword ptr [esp + 0x1c], eax // 8b4050 | mov eax, dword ptr [eax + 0x50] // 8db708010000 | lea esi, [edi + 0x108] // 890424 | mov dword ptr [esp], eax // 89442418 | mov dword ptr [esp + 0x18], eax $sequence_29 = { eb5d 8b54240c 81fa80000000 7c0e 0fba25????????01 0f82de1f0000 } // n = 6, score = 100 // eb5d | jmp 0x5f // 8b54240c | mov edx, dword ptr [esp + 0xc] // 81fa80000000 | cmp edx, 0x80 // 7c0e | jl 0x10 // 0fba25????????01 | // 0f82de1f0000 | jb 0x1fe4 $sequence_30 = { 89442418 e8???????? 89c3 8b4754 c7442404???????? 891c24 89442408 } // n = 7, score = 100 // 89442418 | mov dword ptr [esp + 0x18], eax // e8???????? | // 89c3 | mov ebx, eax // 8b4754 | mov eax, dword ptr [edi + 0x54] // c7442404???????? | // 891c24 | mov dword ptr [esp], ebx // 89442408 | mov dword ptr [esp + 8], eax $sequence_31 = { 89dd 8944240c 8b442418 89442404 e8???????? 83ec10 8b44241c } // n = 7, score = 100 // 89dd | mov ebp, ebx // 8944240c | mov dword ptr [esp + 0xc], eax // 8b442418 | mov eax, dword ptr [esp + 0x18] // 89442404 | mov dword ptr [esp + 4], eax // e8???????? | // 83ec10 | sub esp, 0x10 // 8b44241c | mov eax, dword ptr [esp + 0x1c] condition: 7 of them and filesize < 1196032 }