rule win_webc2_greencat_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2026-09-17"
        version = "1"
        description = "Detects win.webc2_greencat."
        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.webc2_greencat"
        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 = { 57 50 ff15???????? 8d8594feffff 68???????? }
            // n = 5, score = 100
            //   57                   | push                edi
            //   50                   | push                eax
            //   ff15????????         |                     
            //   8d8594feffff         | lea                 eax, [ebp - 0x16c]
            //   68????????           |                     

        $sequence_1 = { e8???????? 83c414 33c9 3bfb 7632 }
            // n = 5, score = 100
            //   e8????????           |                     
            //   83c414               | add                 esp, 0x14
            //   33c9                 | xor                 ecx, ecx
            //   3bfb                 | cmp                 edi, ebx
            //   7632                 | jbe                 0x34

        $sequence_2 = { a3???????? 8a45ff a2???????? 33c0 5f }
            // n = 5, score = 100
            //   a3????????           |                     
            //   8a45ff               | mov                 al, byte ptr [ebp - 1]
            //   a2????????           |                     
            //   33c0                 | xor                 eax, eax
            //   5f                   | pop                 edi

        $sequence_3 = { 397de8 7404 3bdf 75c9 be00000200 }
            // n = 5, score = 100
            //   397de8               | cmp                 dword ptr [ebp - 0x18], edi
            //   7404                 | je                  6
            //   3bdf                 | cmp                 ebx, edi
            //   75c9                 | jne                 0xffffffcb
            //   be00000200           | mov                 esi, 0x20000

        $sequence_4 = { 8bf0 33ff 391d???????? 7417 3bf3 7513 }
            // n = 6, score = 100
            //   8bf0                 | mov                 esi, eax
            //   33ff                 | xor                 edi, edi
            //   391d????????         |                     
            //   7417                 | je                  0x19
            //   3bf3                 | cmp                 esi, ebx
            //   7513                 | jne                 0x15

        $sequence_5 = { 57 55 ff7614 68???????? 50 ff15???????? }
            // n = 6, score = 100
            //   57                   | push                edi
            //   55                   | push                ebp
            //   ff7614               | push                dword ptr [esi + 0x14]
            //   68????????           |                     
            //   50                   | push                eax
            //   ff15????????         |                     

        $sequence_6 = { 750a 68???????? e9???????? 8b35???????? 50 68???????? ffd6 }
            // n = 7, score = 100
            //   750a                 | jne                 0xc
            //   68????????           |                     
            //   e9????????           |                     
            //   8b35????????         |                     
            //   50                   | push                eax
            //   68????????           |                     
            //   ffd6                 | call                esi

        $sequence_7 = { e8???????? a1???????? 83c40c 897dac }
            // n = 4, score = 100
            //   e8????????           |                     
            //   a1????????           |                     
            //   83c40c               | add                 esp, 0xc
            //   897dac               | mov                 dword ptr [ebp - 0x54], edi

        $sequence_8 = { 50 53 ff15???????? 33c9 8945f0 }
            // n = 5, score = 100
            //   50                   | push                eax
            //   53                   | push                ebx
            //   ff15????????         |                     
            //   33c9                 | xor                 ecx, ecx
            //   8945f0               | mov                 dword ptr [ebp - 0x10], eax

        $sequence_9 = { ffd7 83c40c 85c0 740e 68???????? 53 }
            // n = 6, score = 100
            //   ffd7                 | call                edi
            //   83c40c               | add                 esp, 0xc
            //   85c0                 | test                eax, eax
            //   740e                 | je                  0x10
            //   68????????           |                     
            //   53                   | push                ebx

    condition:
        7 of them and filesize < 57344
}