rule win_tinynuke_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2026-05-04"
        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 = "20260422"
        malpedia_hash = "a182e35da64e6d71cb55f125c4d4225196523f14"
        malpedia_version = "20260504"
        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 = { 8d8530f6ffff 50 6802020000 ff15???????? }
            // n = 4, score = 1400
            //   8d8530f6ffff         | lea                 eax, [ebp - 0x9d0]
            //   50                   | push                eax
            //   6802020000           | push                0x202
            //   ff15????????         |                     

        $sequence_2 = { 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_3 = { 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_4 = { 51 53 56 57 8d45fc 50 bb3f000f00 }
            // n = 7, score = 1400
            //   51                   | push                ecx
            //   53                   | push                ebx
            //   56                   | push                esi
            //   57                   | push                edi
            //   8d45fc               | lea                 eax, [ebp - 4]
            //   50                   | push                eax
            //   bb3f000f00           | mov                 ebx, 0xf003f

        $sequence_5 = { ff15???????? 8bc3 5b 5f 5d c3 55 }
            // n = 7, score = 1400
            //   ff15????????         |                     
            //   8bc3                 | mov                 eax, ebx
            //   5b                   | pop                 ebx
            //   5f                   | pop                 edi
            //   5d                   | pop                 ebp
            //   c3                   | ret                 
            //   55                   | push                ebp

        $sequence_6 = { 85c0 7526 56 8d45f8 50 56 }
            // n = 6, score = 1400
            //   85c0                 | test                eax, eax
            //   7526                 | jne                 0x28
            //   56                   | push                esi
            //   8d45f8               | lea                 eax, [ebp - 8]
            //   50                   | push                eax
            //   56                   | push                esi

        $sequence_7 = { 50 ff15???????? ff35???????? 8d85a4feffff 50 ff15???????? }
            // n = 6, score = 1300
            //   50                   | push                eax
            //   ff15????????         |                     
            //   ff35????????         |                     
            //   8d85a4feffff         | lea                 eax, [ebp - 0x15c]
            //   50                   | push                eax
            //   ff15????????         |                     

        $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???????? a3???????? ff35???????? ff75f8 ff15???????? }
            // n = 5, score = 800
            //   ff15????????         |                     
            //   a3????????           |                     
            //   ff35????????         |                     
            //   ff75f8               | push                dword ptr [ebp - 8]
            //   ff15????????         |                     

        $sequence_10 = { 6a2a 50 8945fc ff15???????? }
            // n = 4, score = 800
            //   6a2a                 | push                0x2a
            //   50                   | push                eax
            //   8945fc               | mov                 dword ptr [ebp - 4], eax
            //   ff15????????         |                     

        $sequence_11 = { 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_12 = { a3???????? 68e2010000 68???????? 68???????? }
            // n = 4, score = 800
            //   a3????????           |                     
            //   68e2010000           | push                0x1e2
            //   68????????           |                     
            //   68????????           |                     

        $sequence_13 = { e8???????? eb18 83f803 7519 }
            // n = 4, score = 800
            //   e8????????           |                     
            //   eb18                 | jmp                 0x1a
            //   83f803               | cmp                 eax, 3
            //   7519                 | jne                 0x1b

        $sequence_14 = { a3???????? ff35???????? ff75ec ff15???????? }
            // n = 4, score = 800
            //   a3????????           |                     
            //   ff35????????         |                     
            //   ff75ec               | push                dword ptr [ebp - 0x14]
            //   ff15????????         |                     

        $sequence_15 = { 59 50 68???????? 68???????? ff15???????? }
            // n = 5, score = 700
            //   59                   | pop                 ecx
            //   50                   | push                eax
            //   68????????           |                     
            //   68????????           |                     
            //   ff15????????         |                     

        $sequence_16 = { ff75fc 8d85f0fdffff 50 e8???????? 59 50 }
            // n = 6, score = 700
            //   ff75fc               | push                dword ptr [ebp - 4]
            //   8d85f0fdffff         | lea                 eax, [ebp - 0x210]
            //   50                   | push                eax
            //   e8????????           |                     
            //   59                   | pop                 ecx
            //   50                   | push                eax

        $sequence_17 = { 8d7de0 f3ab 8d45dc 50 ff15???????? 8d85d0fcffff 50 }
            // n = 7, score = 700
            //   8d7de0               | lea                 edi, [ebp - 0x20]
            //   f3ab                 | rep stosd           dword ptr es:[edi], eax
            //   8d45dc               | lea                 eax, [ebp - 0x24]
            //   50                   | push                eax
            //   ff15????????         |                     
            //   8d85d0fcffff         | lea                 eax, [ebp - 0x330]
            //   50                   | push                eax

        $sequence_18 = { ff15???????? 8b35???????? 8d430c 50 }
            // n = 4, score = 200
            //   ff15????????         |                     
            //   8b35????????         |                     
            //   8d430c               | lea                 eax, [ebx + 0xc]
            //   50                   | push                eax

        $sequence_19 = { 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_20 = { 7ee1 31db 8b049d1410e26e 85c0 7402 ffd0 }
            // n = 6, score = 100
            //   7ee1                 | jle                 0xffffffe3
            //   31db                 | xor                 ebx, ebx
            //   8b049d1410e26e       | mov                 eax, dword ptr [ebx*4 + 0x6ee21014]
            //   85c0                 | test                eax, eax
            //   7402                 | je                  4
            //   ffd0                 | call                eax

        $sequence_21 = { 8d50f8 d1ea 7432 8d4608 }
            // n = 4, score = 100
            //   8d50f8               | lea                 edx, [eax - 8]
            //   d1ea                 | shr                 edx, 1
            //   7432                 | je                  0x34
            //   8d4608               | lea                 eax, [esi + 8]

        $sequence_22 = { 8344241814 8b442418 8b400c 85c0 75a4 }
            // n = 5, score = 100
            //   8344241814           | add                 dword ptr [esp + 0x18], 0x14
            //   8b442418             | mov                 eax, dword ptr [esp + 0x18]
            //   8b400c               | mov                 eax, dword ptr [eax + 0xc]
            //   85c0                 | test                eax, eax
            //   75a4                 | jne                 0xffffffa6

        $sequence_23 = { 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_24 = { 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_25 = { 89442418 8b400c 85c0 745c }
            // n = 4, score = 100
            //   89442418             | mov                 dword ptr [esp + 0x18], eax
            //   8b400c               | mov                 eax, dword ptr [eax + 0xc]
            //   85c0                 | test                eax, eax
            //   745c                 | je                  0x5e

        $sequence_26 = { 8bb0a0000000 2b6834 01de 8b16 85d2 7449 8b4604 }
            // n = 7, score = 100
            //   8bb0a0000000         | mov                 esi, dword ptr [eax + 0xa0]
            //   2b6834               | sub                 ebp, dword ptr [eax + 0x34]
            //   01de                 | add                 esi, ebx
            //   8b16                 | mov                 edx, dword ptr [esi]
            //   85d2                 | test                edx, edx
            //   7449                 | je                  0x4b
            //   8b4604               | mov                 eax, dword ptr [esi + 4]

        $sequence_27 = { 837c243401 7537 c744241400000000 c744241000000000 c744240c00000000 c7442408???????? }
            // n = 6, score = 100
            //   837c243401           | cmp                 dword ptr [esp + 0x34], 1
            //   7537                 | jne                 0x39
            //   c744241400000000     | mov                 dword ptr [esp + 0x14], 0
            //   c744241000000000     | mov                 dword ptr [esp + 0x10], 0
            //   c744240c00000000     | mov                 dword ptr [esp + 0xc], 0
            //   c7442408????????     |                     

        $sequence_28 = { 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_29 = { 732e 8b5304 b904000000 8d820000e06e }
            // n = 4, score = 100
            //   732e                 | jae                 0x30
            //   8b5304               | mov                 edx, dword ptr [ebx + 4]
            //   b904000000           | mov                 ecx, 4
            //   8d820000e06e         | lea                 eax, [edx + 0x6ee00000]

    condition:
        7 of them and filesize < 1196032
}