rule win_greetingghoul_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2026-09-17"
        version = "1"
        description = "Detects win.greetingghoul."
        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.greetingghoul"
        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 = { 83ff09 730e 57 53 e8???????? 8b3e 83c408 }
            // n = 7, score = 200
            //   83ff09               | cmp                 edi, 9
            //   730e                 | jae                 0x10
            //   57                   | push                edi
            //   53                   | push                ebx
            //   e8????????           |                     
            //   8b3e                 | mov                 edi, dword ptr [esi]
            //   83c408               | add                 esp, 8

        $sequence_1 = { 6a00 57 56 ff33 }
            // n = 4, score = 200
            //   6a00                 | push                0
            //   57                   | push                edi
            //   56                   | push                esi
            //   ff33                 | push                dword ptr [ebx]

        $sequence_2 = { 75fa 8945f4 33c9 894df8 380f 7409 41 }
            // n = 7, score = 200
            //   75fa                 | jne                 0xfffffffc
            //   8945f4               | mov                 dword ptr [ebp - 0xc], eax
            //   33c9                 | xor                 ecx, ecx
            //   894df8               | mov                 dword ptr [ebp - 8], ecx
            //   380f                 | cmp                 byte ptr [edi], cl
            //   7409                 | je                  0xb
            //   41                   | inc                 ecx

        $sequence_3 = { 886dff 3acd 750c 40 84c9 }
            // n = 5, score = 200
            //   886dff               | mov                 byte ptr [ebp - 1], ch
            //   3acd                 | cmp                 cl, ch
            //   750c                 | jne                 0xe
            //   40                   | inc                 eax
            //   84c9                 | test                cl, cl

        $sequence_4 = { 8d4721 50 56 e8???????? }
            // n = 4, score = 200
            //   8d4721               | lea                 eax, [edi + 0x21]
            //   50                   | push                eax
            //   56                   | push                esi
            //   e8????????           |                     

        $sequence_5 = { 83ea01 75eb 8b5dfc 83c8ff 3b5df8 5f }
            // n = 6, score = 200
            //   83ea01               | sub                 edx, 1
            //   75eb                 | jne                 0xffffffed
            //   8b5dfc               | mov                 ebx, dword ptr [ebp - 4]
            //   83c8ff               | or                  eax, 0xffffffff
            //   3b5df8               | cmp                 ebx, dword ptr [ebp - 8]
            //   5f                   | pop                 edi

        $sequence_6 = { 03d7 e8???????? 83c404 85c0 }
            // n = 4, score = 200
            //   03d7                 | add                 edx, edi
            //   e8????????           |                     
            //   83c404               | add                 esp, 4
            //   85c0                 | test                eax, eax

        $sequence_7 = { 0fbec3 8b5dfc 2bc8 74e1 8b45f4 3b5df8 73d9 }
            // n = 7, score = 200
            //   0fbec3               | movsx               eax, bl
            //   8b5dfc               | mov                 ebx, dword ptr [ebp - 4]
            //   2bc8                 | sub                 ecx, eax
            //   74e1                 | je                  0xffffffe3
            //   8b45f4               | mov                 eax, dword ptr [ebp - 0xc]
            //   3b5df8               | cmp                 ebx, dword ptr [ebp - 8]
            //   73d9                 | jae                 0xffffffdb

        $sequence_8 = { 6a02 ff33 ff15???????? 56 ff15???????? 8d4304 50 }
            // n = 7, score = 200
            //   6a02                 | push                2
            //   ff33                 | push                dword ptr [ebx]
            //   ff15????????         |                     
            //   56                   | push                esi
            //   ff15????????         |                     
            //   8d4304               | lea                 eax, [ebx + 4]
            //   50                   | push                eax

        $sequence_9 = { ebec 8d4ad0 80f909 7708 0fbec2 }
            // n = 5, score = 200
            //   ebec                 | jmp                 0xffffffee
            //   8d4ad0               | lea                 ecx, [edx - 0x30]
            //   80f909               | cmp                 cl, 9
            //   7708                 | ja                  0xa
            //   0fbec2               | movsx               eax, dl

    condition:
        7 of them and filesize < 696320
}