rule win_goopic_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2026-05-04"
        version = "1"
        description = "Detects win.goopic."
        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.goopic"
        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 = { ffd3 85c0 7534 6a11 ffd7 }
            // n = 5, score = 100
            //   ffd3                 | call                ebx
            //   85c0                 | test                eax, eax
            //   7534                 | jne                 0x36
            //   6a11                 | push                0x11
            //   ffd7                 | call                edi

        $sequence_1 = { 57 ffd6 8945f8 83f8ff 74dd 6a00 }
            // n = 6, score = 100
            //   57                   | push                edi
            //   ffd6                 | call                esi
            //   8945f8               | mov                 dword ptr [ebp - 8], eax
            //   83f8ff               | cmp                 eax, -1
            //   74dd                 | je                  0xffffffdf
            //   6a00                 | push                0

        $sequence_2 = { 85c0 752f 8d85f4efffff 50 8d85fcefffff }
            // n = 5, score = 100
            //   85c0                 | test                eax, eax
            //   752f                 | jne                 0x31
            //   8d85f4efffff         | lea                 eax, [ebp - 0x100c]
            //   50                   | push                eax
            //   8d85fcefffff         | lea                 eax, [ebp - 0x1004]

        $sequence_3 = { 57 8945f4 a1???????? 68???????? 8945f8 e8???????? }
            // n = 6, score = 100
            //   57                   | push                edi
            //   8945f4               | mov                 dword ptr [ebp - 0xc], eax
            //   a1????????           |                     
            //   68????????           |                     
            //   8945f8               | mov                 dword ptr [ebp - 8], eax
            //   e8????????           |                     

        $sequence_4 = { 8bec b8646a0000 e8???????? a1???????? 33c5 8945fc }
            // n = 6, score = 100
            //   8bec                 | mov                 ebp, esp
            //   b8646a0000           | mov                 eax, 0x6a64
            //   e8????????           |                     
            //   a1????????           |                     
            //   33c5                 | xor                 eax, ebp
            //   8945fc               | mov                 dword ptr [ebp - 4], eax

        $sequence_5 = { 8b7d08 32db 668955fe 8bcf 32f6 be00010000 33c0 }
            // n = 7, score = 100
            //   8b7d08               | mov                 edi, dword ptr [ebp + 8]
            //   32db                 | xor                 bl, bl
            //   668955fe             | mov                 word ptr [ebp - 2], dx
            //   8bcf                 | mov                 ecx, edi
            //   32f6                 | xor                 dh, dh
            //   be00010000           | mov                 esi, 0x100
            //   33c0                 | xor                 eax, eax

        $sequence_6 = { 68???????? ff15???????? 50 ff15???????? ffb5f0efffff ffb5dcefffff ffd0 }
            // n = 7, score = 100
            //   68????????           |                     
            //   ff15????????         |                     
            //   50                   | push                eax
            //   ff15????????         |                     
            //   ffb5f0efffff         | push                dword ptr [ebp - 0x1010]
            //   ffb5dcefffff         | push                dword ptr [ebp - 0x1024]
            //   ffd0                 | call                eax

        $sequence_7 = { 50 ffb5dcefffff ff15???????? 33c0 c785ecefffff00000000 663b4706 7353 }
            // n = 7, score = 100
            //   50                   | push                eax
            //   ffb5dcefffff         | push                dword ptr [ebp - 0x1024]
            //   ff15????????         |                     
            //   33c0                 | xor                 eax, eax
            //   c785ecefffff00000000     | mov    dword ptr [ebp - 0x1014], 0
            //   663b4706             | cmp                 ax, word ptr [edi + 6]
            //   7353                 | jae                 0x55

        $sequence_8 = { 50 6aff 68???????? 6a00 6a00 ffd7 8d842448190000 }
            // n = 7, score = 100
            //   50                   | push                eax
            //   6aff                 | push                -1
            //   68????????           |                     
            //   6a00                 | push                0
            //   6a00                 | push                0
            //   ffd7                 | call                edi
            //   8d842448190000       | lea                 eax, [esp + 0x1948]

        $sequence_9 = { 8d45e0 8bfa 50 8bd9 ff15???????? 85c0 }
            // n = 6, score = 100
            //   8d45e0               | lea                 eax, [ebp - 0x20]
            //   8bfa                 | mov                 edi, edx
            //   50                   | push                eax
            //   8bd9                 | mov                 ebx, ecx
            //   ff15????????         |                     
            //   85c0                 | test                eax, eax

    condition:
        7 of them and filesize < 114688
}