rule win_webc2_rave_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2026-09-17"
        version = "1"
        description = "Detects win.webc2_rave."
        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_rave"
        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 = { 50 51 ffd3 85c0 0f8558ffffff 5f 5e }
            // n = 7, score = 100
            //   50                   | push                eax
            //   51                   | push                ecx
            //   ffd3                 | call                ebx
            //   85c0                 | test                eax, eax
            //   0f8558ffffff         | jne                 0xffffff5e
            //   5f                   | pop                 edi
            //   5e                   | pop                 esi

        $sequence_1 = { 52 50 ffd6 8d8c2454010000 68???????? 51 }
            // n = 6, score = 100
            //   52                   | push                edx
            //   50                   | push                eax
            //   ffd6                 | call                esi
            //   8d8c2454010000       | lea                 ecx, [esp + 0x154]
            //   68????????           |                     
            //   51                   | push                ecx

        $sequence_2 = { 85c0 0f84ca000000 0fbe5c2412 81fb00040000 c644241300 0f87b4000000 b980000000 }
            // n = 7, score = 100
            //   85c0                 | test                eax, eax
            //   0f84ca000000         | je                  0xd0
            //   0fbe5c2412           | movsx               ebx, byte ptr [esp + 0x12]
            //   81fb00040000         | cmp                 ebx, 0x400
            //   c644241300           | mov                 byte ptr [esp + 0x13], 0
            //   0f87b4000000         | ja                  0xba
            //   b980000000           | mov                 ecx, 0x80

        $sequence_3 = { 83ec68 8d442410 50 e8???????? }
            // n = 4, score = 100
            //   83ec68               | sub                 esp, 0x68
            //   8d442410             | lea                 eax, [esp + 0x10]
            //   50                   | push                eax
            //   e8????????           |                     

        $sequence_4 = { f7ea c1fa05 8bca be13000000 }
            // n = 4, score = 100
            //   f7ea                 | imul                edx
            //   c1fa05               | sar                 edx, 5
            //   8bca                 | mov                 ecx, edx
            //   be13000000           | mov                 esi, 0x13

        $sequence_5 = { 8bf8 83ffff 740d 8b4c2410 6a00 51 56 }
            // n = 7, score = 100
            //   8bf8                 | mov                 edi, eax
            //   83ffff               | cmp                 edi, -1
            //   740d                 | je                  0xf
            //   8b4c2410             | mov                 ecx, dword ptr [esp + 0x10]
            //   6a00                 | push                0
            //   51                   | push                ecx
            //   56                   | push                esi

        $sequence_6 = { 750c 68d0070000 45 ff15???????? 83fd0a 7419 }
            // n = 6, score = 100
            //   750c                 | jne                 0xe
            //   68d0070000           | push                0x7d0
            //   45                   | inc                 ebp
            //   ff15????????         |                     
            //   83fd0a               | cmp                 ebp, 0xa
            //   7419                 | je                  0x1b

        $sequence_7 = { 3bc6 0f84be010000 56 6880000000 6a03 56 }
            // n = 6, score = 100
            //   3bc6                 | cmp                 eax, esi
            //   0f84be010000         | je                  0x1c4
            //   56                   | push                esi
            //   6880000000           | push                0x80
            //   6a03                 | push                3
            //   56                   | push                esi

        $sequence_8 = { 8d8c2454010000 68???????? 51 ffd6 897c2418 8d94245c020000 8d842454010000 }
            // n = 7, score = 100
            //   8d8c2454010000       | lea                 ecx, [esp + 0x154]
            //   68????????           |                     
            //   51                   | push                ecx
            //   ffd6                 | call                esi
            //   897c2418             | mov                 dword ptr [esp + 0x18], edi
            //   8d94245c020000       | lea                 edx, [esp + 0x25c]
            //   8d842454010000       | lea                 eax, [esp + 0x154]

        $sequence_9 = { 83c404 ff15???????? 85ff 7407 57 }
            // n = 5, score = 100
            //   83c404               | add                 esp, 4
            //   ff15????????         |                     
            //   85ff                 | test                edi, edi
            //   7407                 | je                  9
            //   57                   | push                edi

    condition:
        7 of them and filesize < 57344
}