rule win_wscspl_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2026-05-04"
        version = "1"
        description = "Detects win.wscspl."
        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.wscspl"
        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 = { 8b3d???????? 8bf0 a1???????? 83c404 50 57 56 }
            // n = 7, score = 400
            //   8b3d????????         |                     
            //   8bf0                 | mov                 esi, eax
            //   a1????????           |                     
            //   83c404               | add                 esp, 4
            //   50                   | push                eax
            //   57                   | push                edi
            //   56                   | push                esi

        $sequence_1 = { 8b842490230000 55 8bac2498230000 56 57 0fbff8 81c745f4ffff }
            // n = 7, score = 400
            //   8b842490230000       | mov                 eax, dword ptr [esp + 0x2390]
            //   55                   | push                ebp
            //   8bac2498230000       | mov                 ebp, dword ptr [esp + 0x2398]
            //   56                   | push                esi
            //   57                   | push                edi
            //   0fbff8               | movsx               edi, ax
            //   81c745f4ffff         | add                 edi, 0xfffff445

        $sequence_2 = { 56 8d44244c 57 8944241c c744241810270000 c744242000000000 }
            // n = 6, score = 400
            //   56                   | push                esi
            //   8d44244c             | lea                 eax, [esp + 0x4c]
            //   57                   | push                edi
            //   8944241c             | mov                 dword ptr [esp + 0x1c], eax
            //   c744241810270000     | mov                 dword ptr [esp + 0x18], 0x2710
            //   c744242000000000     | mov                 dword ptr [esp + 0x20], 0

        $sequence_3 = { 8d842494050000 57 50 e8???????? 83c40c 83cbff }
            // n = 6, score = 400
            //   8d842494050000       | lea                 eax, [esp + 0x594]
            //   57                   | push                edi
            //   50                   | push                eax
            //   e8????????           |                     
            //   83c40c               | add                 esp, 0xc
            //   83cbff               | or                  ebx, 0xffffffff

        $sequence_4 = { 5f 33c0 5e 83c40c c20400 57 }
            // n = 6, score = 400
            //   5f                   | pop                 edi
            //   33c0                 | xor                 eax, eax
            //   5e                   | pop                 esi
            //   83c40c               | add                 esp, 0xc
            //   c20400               | ret                 4
            //   57                   | push                edi

        $sequence_5 = { ff15???????? 687c230000 68be0b0000 33d2 }
            // n = 4, score = 400
            //   ff15????????         |                     
            //   687c230000           | push                0x237c
            //   68be0b0000           | push                0xbbe
            //   33d2                 | xor                 edx, edx

        $sequence_6 = { 663bf8 752f e8???????? 8b0d???????? }
            // n = 4, score = 400
            //   663bf8               | cmp                 di, ax
            //   752f                 | jne                 0x31
            //   e8????????           |                     
            //   8b0d????????         |                     

        $sequence_7 = { 8984247c230000 b8???????? 8d5001 8a08 40 }
            // n = 5, score = 400
            //   8984247c230000       | mov                 dword ptr [esp + 0x237c], eax
            //   b8????????           |                     
            //   8d5001               | lea                 edx, [eax + 1]
            //   8a08                 | mov                 cl, byte ptr [eax]
            //   40                   | inc                 eax

        $sequence_8 = { 89442438 e8???????? 8b7c2438 83c702 68???????? }
            // n = 5, score = 400
            //   89442438             | mov                 dword ptr [esp + 0x38], eax
            //   e8????????           |                     
            //   8b7c2438             | mov                 edi, dword ptr [esp + 0x38]
            //   83c702               | add                 edi, 2
            //   68????????           |                     

        $sequence_9 = { 2bc1 8b4c2448 03f0 8b442444 ba3f3a0000 }
            // n = 5, score = 400
            //   2bc1                 | sub                 eax, ecx
            //   8b4c2448             | mov                 ecx, dword ptr [esp + 0x48]
            //   03f0                 | add                 esi, eax
            //   8b442444             | mov                 eax, dword ptr [esp + 0x44]
            //   ba3f3a0000           | mov                 edx, 0x3a3f

    condition:
        7 of them and filesize < 901120
}