rule win_maktub_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2023-03-28"
        version = "1"
        description = "Detects win.maktub."
        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.maktub"
        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 = { ffd0 f7d8 1bc0 f7d8 8be5 }
            // n = 5, score = 400
            //   ffd0                 | call                eax
            //   f7d8                 | neg                 eax
            //   1bc0                 | sbb                 eax, eax
            //   f7d8                 | neg                 eax
            //   8be5                 | mov                 esp, ebp

        $sequence_1 = { ff15???????? f6c301 7432 8b75b8 }
            // n = 4, score = 300
            //   ff15????????         |                     
            //   f6c301               | test                bl, 1
            //   7432                 | je                  0x34
            //   8b75b8               | mov                 esi, dword ptr [ebp - 0x48]

        $sequence_2 = { c744241000000000 51 50 ff15???????? }
            // n = 4, score = 300
            //   c744241000000000     | mov                 dword ptr [esp + 0x10], 0
            //   51                   | push                ecx
            //   50                   | push                eax
            //   ff15????????         |                     

        $sequence_3 = { ff15???????? ff75f8 ff15???????? 5f 5e b801000000 }
            // n = 6, score = 300
            //   ff15????????         |                     
            //   ff75f8               | push                dword ptr [ebp - 8]
            //   ff15????????         |                     
            //   5f                   | pop                 edi
            //   5e                   | pop                 esi
            //   b801000000           | mov                 eax, 1

        $sequence_4 = { c744241000000000 837e0800 51 89642428 }
            // n = 4, score = 300
            //   c744241000000000     | mov                 dword ptr [esp + 0x10], 0
            //   837e0800             | cmp                 dword ptr [esi + 8], 0
            //   51                   | push                ecx
            //   89642428             | mov                 dword ptr [esp + 0x28], esp

        $sequence_5 = { ff15???????? f6c301 0f8414010000 8d46fc }
            // n = 4, score = 300
            //   ff15????????         |                     
            //   f6c301               | test                bl, 1
            //   0f8414010000         | je                  0x11a
            //   8d46fc               | lea                 eax, [esi - 4]

        $sequence_6 = { ff15???????? eb0a 57 6a08 50 ff15???????? 8bc8 }
            // n = 7, score = 300
            //   ff15????????         |                     
            //   eb0a                 | jmp                 0xc
            //   57                   | push                edi
            //   6a08                 | push                8
            //   50                   | push                eax
            //   ff15????????         |                     
            //   8bc8                 | mov                 ecx, eax

        $sequence_7 = { ff7508 ffd0 8bc8 894de8 83f9ff 7509 c745f400000000 }
            // n = 7, score = 300
            //   ff7508               | push                dword ptr [ebp + 8]
            //   ffd0                 | call                eax
            //   8bc8                 | mov                 ecx, eax
            //   894de8               | mov                 dword ptr [ebp - 0x18], ecx
            //   83f9ff               | cmp                 ecx, -1
            //   7509                 | jne                 0xb
            //   c745f400000000       | mov                 dword ptr [ebp - 0xc], 0

        $sequence_8 = { ff7004 ff30 e8???????? 8bc7 5f 5e 5b }
            // n = 7, score = 200
            //   ff7004               | push                dword ptr [eax + 4]
            //   ff30                 | push                dword ptr [eax]
            //   e8????????           |                     
            //   8bc7                 | mov                 eax, edi
            //   5f                   | pop                 edi
            //   5e                   | pop                 esi
            //   5b                   | pop                 ebx

        $sequence_9 = { 8d4e3c e8???????? 8d4e2c e8???????? }
            // n = 4, score = 100
            //   8d4e3c               | lea                 ecx, [esi + 0x3c]
            //   e8????????           |                     
            //   8d4e2c               | lea                 ecx, [esi + 0x2c]
            //   e8????????           |                     

        $sequence_10 = { 8d4e3c e8???????? 8d4c241c e8???????? }
            // n = 4, score = 100
            //   8d4e3c               | lea                 ecx, [esi + 0x3c]
            //   e8????????           |                     
            //   8d4c241c             | lea                 ecx, [esp + 0x1c]
            //   e8????????           |                     

        $sequence_11 = { 8d4e3c e8???????? 8d4ddc e8???????? }
            // n = 4, score = 100
            //   8d4e3c               | lea                 ecx, [esi + 0x3c]
            //   e8????????           |                     
            //   8d4ddc               | lea                 ecx, [ebp - 0x24]
            //   e8????????           |                     

        $sequence_12 = { 8d4e40 e8???????? 8d4df0 e8???????? }
            // n = 4, score = 100
            //   8d4e40               | lea                 ecx, [esi + 0x40]
            //   e8????????           |                     
            //   8d4df0               | lea                 ecx, [ebp - 0x10]
            //   e8????????           |                     

        $sequence_13 = { d548 7d2b 72db 85be6d80eec9 8518 37 91 }
            // n = 7, score = 100
            //   d548                 | aad                 0x48
            //   7d2b                 | jge                 0x2d
            //   72db                 | jb                  0xffffffdd
            //   85be6d80eec9         | test                dword ptr [esi - 0x36117f93], edi
            //   8518                 | test                dword ptr [eax], ebx
            //   37                   | aaa                 
            //   91                   | xchg                eax, ecx

        $sequence_14 = { d589 4a 2c97 99 }
            // n = 4, score = 100
            //   d589                 | aad                 0x89
            //   4a                   | dec                 edx
            //   2c97                 | sub                 al, 0x97
            //   99                   | cdq                 

        $sequence_15 = { d54b 59 2cdc 8d047589ee28cf }
            // n = 4, score = 100
            //   d54b                 | aad                 0x4b
            //   59                   | pop                 ecx
            //   2cdc                 | sub                 al, 0xdc
            //   8d047589ee28cf       | lea                 eax, [esi*2 - 0x30d71177]

        $sequence_16 = { 8d4e3c e8???????? 51 8d4e68 }
            // n = 4, score = 100
            //   8d4e3c               | lea                 ecx, [esi + 0x3c]
            //   e8????????           |                     
            //   51                   | push                ecx
            //   8d4e68               | lea                 ecx, [esi + 0x68]

        $sequence_17 = { d555 40 f9 c4b4c925105c47 }
            // n = 4, score = 100
            //   d555                 | aad                 0x55
            //   40                   | inc                 eax
            //   f9                   | stc                 
            //   c4b4c925105c47       | les                 esi, ptr [ecx + ecx*8 + 0x475c1025]

        $sequence_18 = { d5d3 ed ff19 334d43 }
            // n = 4, score = 100
            //   d5d3                 | aad                 0xd3
            //   ed                   | in                  eax, dx
            //   ff19                 | lcall               [ecx]
            //   334d43               | xor                 ecx, dword ptr [ebp + 0x43]

        $sequence_19 = { 8d4e34 ff7508 e8???????? 8d4dfc }
            // n = 4, score = 100
            //   8d4e34               | lea                 ecx, [esi + 0x34]
            //   ff7508               | push                dword ptr [ebp + 8]
            //   e8????????           |                     
            //   8d4dfc               | lea                 ecx, [ebp - 4]

        $sequence_20 = { d54d 5b 660fc8 59 }
            // n = 4, score = 100
            //   d54d                 | aad                 0x4d
            //   5b                   | pop                 ebx
            //   660fc8               | bswap               ax
            //   59                   | pop                 ecx

        $sequence_21 = { 8d4e34 e8???????? 8d4e44 e8???????? 8d4508 c7450801000000 }
            // n = 6, score = 100
            //   8d4e34               | lea                 ecx, [esi + 0x34]
            //   e8????????           |                     
            //   8d4e44               | lea                 ecx, [esi + 0x44]
            //   e8????????           |                     
            //   8d4508               | lea                 eax, [ebp + 8]
            //   c7450801000000       | mov                 dword ptr [ebp + 8], 1

    condition:
        7 of them and filesize < 3063808
}