rule win_tinynuke_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2023-01-25"
        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 = "20230124"
        malpedia_hash = "2ee0eebba83dce3d019a90519f2f972c0fcf9686"
        malpedia_version = "20230125"
        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 = { 8d45f8 50 56 57 ff35???????? c745f803000000 ff75fc }
            // n = 7, score = 1400
            //   8d45f8               | lea                 eax, [ebp - 8]
            //   50                   | push                eax
            //   56                   | push                esi
            //   57                   | push                edi
            //   ff35????????         |                     
            //   c745f803000000       | mov                 dword ptr [ebp - 8], 3
            //   ff75fc               | push                dword ptr [ebp - 4]

        $sequence_2 = { 6800000040 ff7508 ff15???????? 53 }
            // n = 4, score = 1400
            //   6800000040           | push                0x40000000
            //   ff7508               | push                dword ptr [ebp + 8]
            //   ff15????????         |                     
            //   53                   | push                ebx

        $sequence_3 = { 8bf0 8d45fc 50 53 56 57 ff15???????? }
            // n = 7, score = 1400
            //   8bf0                 | mov                 esi, eax
            //   8d45fc               | lea                 eax, [ebp - 4]
            //   50                   | push                eax
            //   53                   | push                ebx
            //   56                   | push                esi
            //   57                   | push                edi
            //   ff15????????         |                     

        $sequence_4 = { 8d8530f6ffff 50 6802020000 ff15???????? }
            // n = 4, score = 1400
            //   8d8530f6ffff         | lea                 eax, [ebp - 0x9d0]
            //   50                   | push                eax
            //   6802020000           | push                0x202
            //   ff15????????         |                     

        $sequence_5 = { 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_6 = { ff35???????? a3???????? ff75f4 ff15???????? ff35???????? a3???????? ff75f4 }
            // n = 7, score = 1400
            //   ff35????????         |                     
            //   a3????????           |                     
            //   ff75f4               | push                dword ptr [ebp - 0xc]
            //   ff15????????         |                     
            //   ff35????????         |                     
            //   a3????????           |                     
            //   ff75f4               | push                dword ptr [ebp - 0xc]

        $sequence_7 = { 59 33f6 57 ff15???????? 8bc6 5e }
            // n = 6, score = 1400
            //   59                   | pop                 ecx
            //   33f6                 | xor                 esi, esi
            //   57                   | push                edi
            //   ff15????????         |                     
            //   8bc6                 | mov                 eax, esi
            //   5e                   | pop                 esi

        $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 = { ff35???????? 8d85a4feffff 50 ff15???????? ff35???????? }
            // n = 5, score = 1300
            //   ff35????????         |                     
            //   8d85a4feffff         | lea                 eax, [ebp - 0x15c]
            //   50                   | push                eax
            //   ff15????????         |                     
            //   ff35????????         |                     

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

        $sequence_12 = { ff7508 ff15???????? ff35???????? ff7508 }
            // n = 4, score = 800
            //   ff7508               | push                dword ptr [ebp + 8]
            //   ff15????????         |                     
            //   ff35????????         |                     
            //   ff7508               | push                dword ptr [ebp + 8]

        $sequence_13 = { ff35???????? ff7508 ff15???????? 68???????? }
            // n = 4, score = 800
            //   ff35????????         |                     
            //   ff7508               | push                dword ptr [ebp + 8]
            //   ff15????????         |                     
            //   68????????           |                     

        $sequence_14 = { ff75fc ff15???????? a3???????? ff35???????? ff75f8 ff15???????? }
            // n = 6, score = 800
            //   ff75fc               | push                dword ptr [ebp - 4]
            //   ff15????????         |                     
            //   a3????????           |                     
            //   ff35????????         |                     
            //   ff75f8               | push                dword ptr [ebp - 8]
            //   ff15????????         |                     

        $sequence_15 = { a3???????? ff35???????? ff75ec ff15???????? }
            // n = 4, score = 800
            //   a3????????           |                     
            //   ff35????????         |                     
            //   ff75ec               | push                dword ptr [ebp - 0x14]
            //   ff15????????         |                     

        $sequence_16 = { 8a00 3c0a 7409 3c0d 740f }
            // n = 5, score = 800
            //   8a00                 | mov                 al, byte ptr [eax]
            //   3c0a                 | cmp                 al, 0xa
            //   7409                 | je                  0xb
            //   3c0d                 | cmp                 al, 0xd
            //   740f                 | je                  0x11

        $sequence_17 = { c70604000000 e8???????? eb18 83f803 7519 }
            // n = 5, score = 800
            //   c70604000000         | mov                 dword ptr [esi], 4
            //   e8????????           |                     
            //   eb18                 | jmp                 0x1a
            //   83f803               | cmp                 eax, 3
            //   7519                 | jne                 0x1b

        $sequence_18 = { 8d85d0fcffff 50 e8???????? 59 8d85d0fcffff 50 8d85d8feffff }
            // n = 7, score = 700
            //   8d85d0fcffff         | lea                 eax, [ebp - 0x330]
            //   50                   | push                eax
            //   e8????????           |                     
            //   59                   | pop                 ecx
            //   8d85d0fcffff         | lea                 eax, [ebp - 0x330]
            //   50                   | push                eax
            //   8d85d8feffff         | lea                 eax, [ebp - 0x128]

        $sequence_19 = { ff15???????? 8b35???????? 8d430c 50 }
            // n = 4, score = 200
            //   ff15????????         |                     
            //   8b35????????         |                     
            //   8d430c               | lea                 eax, [ebx + 0xc]
            //   50                   | push                eax

        $sequence_20 = { e8???????? 83ec04 89c6 8b442418 }
            // n = 4, score = 100
            //   e8????????           |                     
            //   83ec04               | sub                 esp, 4
            //   89c6                 | mov                 esi, eax
            //   8b442418             | mov                 eax, dword ptr [esp + 0x18]

        $sequence_21 = { 8b400c 85c0 75a4 8b7c241c 8b4728 891c24 }
            // n = 6, score = 100
            //   8b400c               | mov                 eax, dword ptr [eax + 0xc]
            //   85c0                 | test                eax, eax
            //   75a4                 | jne                 0xffffffa6
            //   8b7c241c             | mov                 edi, dword ptr [esp + 0x1c]
            //   8b4728               | mov                 eax, dword ptr [edi + 0x28]
            //   891c24               | mov                 dword ptr [esp], ebx

        $sequence_22 = { 328248c0e16e 8883ff1fe06e 81fb00900100 75c9 a1???????? }
            // n = 5, score = 100
            //   328248c0e16e         | xor                 al, byte ptr [edx + 0x6ee1c048]
            //   8883ff1fe06e         | mov                 byte ptr [ebx + 0x6ee01fff], al
            //   81fb00900100         | cmp                 ebx, 0x19000
            //   75c9                 | jne                 0xffffffcb
            //   a1????????           |                     

        $sequence_23 = { 891c24 c744241881000000 c744241400000000 c744241000000000 c744240c50c30000 c744240850c30000 c744240400000000 }
            // n = 7, score = 100
            //   891c24               | mov                 dword ptr [esp], ebx
            //   c744241881000000     | mov                 dword ptr [esp + 0x18], 0x81
            //   c744241400000000     | mov                 dword ptr [esp + 0x14], 0
            //   c744241000000000     | mov                 dword ptr [esp + 0x10], 0
            //   c744240c50c30000     | mov                 dword ptr [esp + 0xc], 0xc350
            //   c744240850c30000     | mov                 dword ptr [esp + 8], 0xc350
            //   c744240400000000     | mov                 dword ptr [esp + 4], 0

        $sequence_24 = { ffd3 3c0c 741b c7050000000000000000 0f0b c7042400000000 }
            // n = 6, score = 100
            //   ffd3                 | call                ebx
            //   3c0c                 | cmp                 al, 0xc
            //   741b                 | je                  0x1d
            //   c7050000000000000000     | mov    dword ptr [0], 0
            //   0f0b                 | ud2                 
            //   c7042400000000       | mov                 dword ptr [esp], 0

        $sequence_25 = { 7432 8d4608 8d7c5608 8db42600000000 0fb710 89d1 c1fa0c }
            // n = 7, score = 100
            //   7432                 | je                  0x34
            //   8d4608               | lea                 eax, [esi + 8]
            //   8d7c5608             | lea                 edi, [esi + edx*2 + 8]
            //   8db42600000000       | lea                 esi, [esi]
            //   0fb710               | movzx               edx, word ptr [eax]
            //   89d1                 | mov                 ecx, edx
            //   c1fa0c               | sar                 edx, 0xc

        $sequence_26 = { 897701 c78550beffff00000000 ffd3 b001 }
            // n = 4, score = 100
            //   897701               | mov                 dword ptr [edi + 1], esi
            //   c78550beffff00000000     | mov    dword ptr [ebp - 0x41b0], 0
            //   ffd3                 | call                ebx
            //   b001                 | mov                 al, 1

        $sequence_27 = { 85ed 750c eb38 83c701 }
            // n = 4, score = 100
            //   85ed                 | test                ebp, ebp
            //   750c                 | jne                 0xe
            //   eb38                 | jmp                 0x3a
            //   83c701               | add                 edi, 1

        $sequence_28 = { 8db708010000 890424 89442418 e8???????? 89c3 8b4754 }
            // n = 6, score = 100
            //   8db708010000         | lea                 esi, [edi + 0x108]
            //   890424               | mov                 dword ptr [esp], eax
            //   89442418             | mov                 dword ptr [esp + 0x18], eax
            //   e8????????           |                     
            //   89c3                 | mov                 ebx, eax
            //   8b4754               | mov                 eax, dword ptr [edi + 0x54]

        $sequence_29 = { c745eca8f00110 c745f0c4f00110 897df4 897df8 }
            // n = 4, score = 100
            //   c745eca8f00110       | mov                 dword ptr [ebp - 0x14], 0x1001f0a8
            //   c745f0c4f00110       | mov                 dword ptr [ebp - 0x10], 0x1001f0c4
            //   897df4               | mov                 dword ptr [ebp - 0xc], edi
            //   897df8               | mov                 dword ptr [ebp - 8], edi

        $sequence_30 = { 8bda 895de4 894de8 85c9 }
            // n = 4, score = 100
            //   8bda                 | mov                 ebx, edx
            //   895de4               | mov                 dword ptr [ebp - 0x1c], ebx
            //   894de8               | mov                 dword ptr [ebp - 0x18], ecx
            //   85c9                 | test                ecx, ecx

    condition:
        7 of them and filesize < 1196032
}