rule win_badhatch_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2026-09-17"
        version = "1"
        description = "Detects win.badhatch."
        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.badhatch"
        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 = { 8b7dc4 8d8568dfffff 2bf8 8d443f02 50 6a00 ff35???????? }
            // n = 7, score = 100
            //   8b7dc4               | mov                 edi, dword ptr [ebp - 0x3c]
            //   8d8568dfffff         | lea                 eax, [ebp - 0x2098]
            //   2bf8                 | sub                 edi, eax
            //   8d443f02             | lea                 eax, [edi + edi + 2]
            //   50                   | push                eax
            //   6a00                 | push                0
            //   ff35????????         |                     

        $sequence_1 = { 53 e8???????? 33c9 83c40c 8bf0 }
            // n = 5, score = 100
            //   53                   | push                ebx
            //   e8????????           |                     
            //   33c9                 | xor                 ecx, ecx
            //   83c40c               | add                 esp, 0xc
            //   8bf0                 | mov                 esi, eax

        $sequence_2 = { e8???????? 83c41c 8bf8 8b75fc e8???????? 8bc7 5f }
            // n = 7, score = 100
            //   e8????????           |                     
            //   83c41c               | add                 esp, 0x1c
            //   8bf8                 | mov                 edi, eax
            //   8b75fc               | mov                 esi, dword ptr [ebp - 4]
            //   e8????????           |                     
            //   8bc7                 | mov                 eax, edi
            //   5f                   | pop                 edi

        $sequence_3 = { ff35???????? c745fc08000000 c745e401000000 c745e810270000 c745ece8030000 c745f4e0930400 8975f8 }
            // n = 7, score = 100
            //   ff35????????         |                     
            //   c745fc08000000       | mov                 dword ptr [ebp - 4], 8
            //   c745e401000000       | mov                 dword ptr [ebp - 0x1c], 1
            //   c745e810270000       | mov                 dword ptr [ebp - 0x18], 0x2710
            //   c745ece8030000       | mov                 dword ptr [ebp - 0x14], 0x3e8
            //   c745f4e0930400       | mov                 dword ptr [ebp - 0xc], 0x493e0
            //   8975f8               | mov                 dword ptr [ebp - 8], esi

        $sequence_4 = { 7716 720a 817c242000f00700 730a 8b442420 894c243c }
            // n = 6, score = 100
            //   7716                 | ja                  0x18
            //   720a                 | jb                  0xc
            //   817c242000f00700     | cmp                 dword ptr [esp + 0x20], 0x7f000
            //   730a                 | jae                 0xc
            //   8b442420             | mov                 eax, dword ptr [esp + 0x20]
            //   894c243c             | mov                 dword ptr [esp + 0x3c], ecx

        $sequence_5 = { c7873001000001000000 6a00 6a02 68???????? ff75fc ffd6 5f }
            // n = 7, score = 100
            //   c7873001000001000000     | mov    dword ptr [edi + 0x130], 1
            //   6a00                 | push                0
            //   6a02                 | push                2
            //   68????????           |                     
            //   ff75fc               | push                dword ptr [ebp - 4]
            //   ffd6                 | call                esi
            //   5f                   | pop                 edi

        $sequence_6 = { eb05 ff7240 33c0 e8???????? 8bf0 59 85f6 }
            // n = 7, score = 100
            //   eb05                 | jmp                 7
            //   ff7240               | push                dword ptr [edx + 0x40]
            //   33c0                 | xor                 eax, eax
            //   e8????????           |                     
            //   8bf0                 | mov                 esi, eax
            //   59                   | pop                 ecx
            //   85f6                 | test                esi, esi

        $sequence_7 = { 8d856bdfffff e8???????? 59 8945e4 85c0 740b 50 }
            // n = 7, score = 100
            //   8d856bdfffff         | lea                 eax, [ebp - 0x2095]
            //   e8????????           |                     
            //   59                   | pop                 ecx
            //   8945e4               | mov                 dword ptr [ebp - 0x1c], eax
            //   85c0                 | test                eax, eax
            //   740b                 | je                  0xd
            //   50                   | push                eax

        $sequence_8 = { ff15???????? 89442410 3bc3 750d c744240808000000 e9???????? 53 }
            // n = 7, score = 100
            //   ff15????????         |                     
            //   89442410             | mov                 dword ptr [esp + 0x10], eax
            //   3bc3                 | cmp                 eax, ebx
            //   750d                 | jne                 0xf
            //   c744240808000000     | mov                 dword ptr [esp + 8], 8
            //   e9????????           |                     
            //   53                   | push                ebx

        $sequence_9 = { 68c0270900 ffb744010000 ff15???????? 8364240c00 6a00 ffb744010000 ff15???????? }
            // n = 7, score = 100
            //   68c0270900           | push                0x927c0
            //   ffb744010000         | push                dword ptr [edi + 0x144]
            //   ff15????????         |                     
            //   8364240c00           | and                 dword ptr [esp + 0xc], 0
            //   6a00                 | push                0
            //   ffb744010000         | push                dword ptr [edi + 0x144]
            //   ff15????????         |                     

    condition:
        7 of them and filesize < 156672
}