rule win_pony_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2023-07-11"
        version = "1"
        description = "Detects win.pony."
        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.pony"
        malpedia_rule_date = "20230705"
        malpedia_hash = "42d0574f4405bd7d2b154d321d345acb18834a41"
        malpedia_version = "20230715"
        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 = { e8???????? 83c404 0500005000 50 e8???????? 8945ec ff75f4 }
            // n = 7, score = 800
            //   e8????????           |                     
            //   83c404               | add                 esp, 4
            //   0500005000           | add                 eax, 0x500000
            //   50                   | push                eax
            //   e8????????           |                     
            //   8945ec               | mov                 dword ptr [ebp - 0x14], eax
            //   ff75f4               | push                dword ptr [ebp - 0xc]

        $sequence_1 = { 50 ff7508 e8???????? 8945e8 837df000 7473 837dec00 }
            // n = 7, score = 800
            //   50                   | push                eax
            //   ff7508               | push                dword ptr [ebp + 8]
            //   e8????????           |                     
            //   8945e8               | mov                 dword ptr [ebp - 0x18], eax
            //   837df000             | cmp                 dword ptr [ebp - 0x10], 0
            //   7473                 | je                  0x75
            //   837dec00             | cmp                 dword ptr [ebp - 0x14], 0

        $sequence_2 = { e8???????? 8d45f0 50 83c308 53 e8???????? 68???????? }
            // n = 7, score = 800
            //   e8????????           |                     
            //   8d45f0               | lea                 eax, [ebp - 0x10]
            //   50                   | push                eax
            //   83c308               | add                 ebx, 8
            //   53                   | push                ebx
            //   e8????????           |                     
            //   68????????           |                     

        $sequence_3 = { ff7508 e8???????? e8???????? e8???????? 6a00 68???????? 68???????? }
            // n = 7, score = 800
            //   ff7508               | push                dword ptr [ebp + 8]
            //   e8????????           |                     
            //   e8????????           |                     
            //   e8????????           |                     
            //   6a00                 | push                0
            //   68????????           |                     
            //   68????????           |                     

        $sequence_4 = { f3a5 5e 5f 5a }
            // n = 4, score = 800
            //   f3a5                 | rep movsd           dword ptr es:[edi], dword ptr [esi]
            //   5e                   | pop                 esi
            //   5f                   | pop                 edi
            //   5a                   | pop                 edx

        $sequence_5 = { c1c61e 8bfe 8bf3 c1c305 03d8 41 75d0 }
            // n = 7, score = 800
            //   c1c61e               | rol                 esi, 0x1e
            //   8bfe                 | mov                 edi, esi
            //   8bf3                 | mov                 esi, ebx
            //   c1c305               | rol                 ebx, 5
            //   03d8                 | add                 ebx, eax
            //   41                   | inc                 ecx
            //   75d0                 | jne                 0xffffffd2

        $sequence_6 = { ff750c 8f45f8 c705????????01234567 c705????????89abcdef c705????????fedcba98 c705????????76543210 c705????????f0e1d2c3 }
            // n = 7, score = 800
            //   ff750c               | push                dword ptr [ebp + 0xc]
            //   8f45f8               | pop                 dword ptr [ebp - 8]
            //   c705????????01234567     |     
            //   c705????????89abcdef     |     
            //   c705????????fedcba98     |     
            //   c705????????76543210     |     
            //   c705????????f0e1d2c3     |     

        $sequence_7 = { bfffffffff 33fa 0bfb 33f9 8d8407442229f4 0306 }
            // n = 6, score = 800
            //   bfffffffff           | mov                 edi, 0xffffffff
            //   33fa                 | xor                 edi, edx
            //   0bfb                 | or                  edi, ebx
            //   33f9                 | xor                 edi, ecx
            //   8d8407442229f4       | lea                 eax, [edi + eax - 0xbd6ddbc]
            //   0306                 | add                 eax, dword ptr [esi]

        $sequence_8 = { c21400 55 8bec 680000efbe 68???????? ff750c }
            // n = 6, score = 800
            //   c21400               | ret                 0x14
            //   55                   | push                ebp
            //   8bec                 | mov                 ebp, esp
            //   680000efbe           | push                0xbeef0000
            //   68????????           |                     
            //   ff750c               | push                dword ptr [ebp + 0xc]

        $sequence_9 = { e8???????? 50 ff7508 e8???????? 6a00 68???????? 68???????? }
            // n = 7, score = 800
            //   e8????????           |                     
            //   50                   | push                eax
            //   ff7508               | push                dword ptr [ebp + 8]
            //   e8????????           |                     
            //   6a00                 | push                0
            //   68????????           |                     
            //   68????????           |                     

    condition:
        7 of them and filesize < 262144
}