rule win_wscspl_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2023-07-11"
        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 = "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 = { 2bc2 51 8bd8 e8???????? 83c404 8b74240c }
            // n = 6, score = 400
            //   2bc2                 | sub                 eax, edx
            //   51                   | push                ecx
            //   8bd8                 | mov                 ebx, eax
            //   e8????????           |                     
            //   83c404               | add                 esp, 4
            //   8b74240c             | mov                 esi, dword ptr [esp + 0xc]

        $sequence_1 = { 52 6a00 ff15???????? 0fb744241a }
            // n = 4, score = 400
            //   52                   | push                edx
            //   6a00                 | push                0
            //   ff15????????         |                     
            //   0fb744241a           | movzx               eax, word ptr [esp + 0x1a]

        $sequence_2 = { 888c0480030000 40 84c9 75ee 8d842480030000 48 }
            // n = 6, score = 400
            //   888c0480030000       | mov                 byte ptr [esp + eax + 0x380], cl
            //   40                   | inc                 eax
            //   84c9                 | test                cl, cl
            //   75ee                 | jne                 0xfffffff0
            //   8d842480030000       | lea                 eax, [esp + 0x380]
            //   48                   | dec                 eax

        $sequence_3 = { 33c9 e9???????? 57 6a00 }
            // n = 4, score = 400
            //   33c9                 | xor                 ecx, ecx
            //   e9????????           |                     
            //   57                   | push                edi
            //   6a00                 | push                0

        $sequence_4 = { 8d442430 50 6a02 ff15???????? 33c0 8d4c240c 51 }
            // n = 7, score = 400
            //   8d442430             | lea                 eax, [esp + 0x30]
            //   50                   | push                eax
            //   6a02                 | push                2
            //   ff15????????         |                     
            //   33c0                 | xor                 eax, eax
            //   8d4c240c             | lea                 ecx, [esp + 0xc]
            //   51                   | push                ecx

        $sequence_5 = { 03c9 3bc1 7702 8bc1 }
            // n = 4, score = 400
            //   03c9                 | add                 ecx, ecx
            //   3bc1                 | cmp                 eax, ecx
            //   7702                 | ja                  4
            //   8bc1                 | mov                 eax, ecx

        $sequence_6 = { 81fe7c230000 7627 b885b7dce6 f7e6 c1ea0d 8bca 69d27c230000 }
            // n = 7, score = 400
            //   81fe7c230000         | cmp                 esi, 0x237c
            //   7627                 | jbe                 0x29
            //   b885b7dce6           | mov                 eax, 0xe6dcb785
            //   f7e6                 | mul                 esi
            //   c1ea0d               | shr                 edx, 0xd
            //   8bca                 | mov                 ecx, edx
            //   69d27c230000         | imul                edx, edx, 0x237c

        $sequence_7 = { ff15???????? 6689442402 a1???????? 85c0 7419 }
            // n = 5, score = 400
            //   ff15????????         |                     
            //   6689442402           | mov                 word ptr [esp + 2], ax
            //   a1????????           |                     
            //   85c0                 | test                eax, eax
            //   7419                 | je                  0x1b

        $sequence_8 = { c1ea0d 8bca 69d27c230000 8bc6 2bc2 890d???????? }
            // n = 6, score = 400
            //   c1ea0d               | shr                 edx, 0xd
            //   8bca                 | mov                 ecx, edx
            //   69d27c230000         | imul                edx, edx, 0x237c
            //   8bc6                 | mov                 eax, esi
            //   2bc2                 | sub                 eax, edx
            //   890d????????         |                     

        $sequence_9 = { e8???????? 8d4c2450 885c2c50 8b2d???????? 51 ffd5 }
            // n = 6, score = 400
            //   e8????????           |                     
            //   8d4c2450             | lea                 ecx, [esp + 0x50]
            //   885c2c50             | mov                 byte ptr [esp + ebp + 0x50], bl
            //   8b2d????????         |                     
            //   51                   | push                ecx
            //   ffd5                 | call                ebp

    condition:
        7 of them and filesize < 901120
}