rule win_goopic_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2026-09-17"
        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 = "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 = { 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 = { 6a00 ff15???????? e8???????? 8d44241c }
            // n = 4, score = 100
            //   6a00                 | push                0
            //   ff15????????         |                     
            //   e8????????           |                     
            //   8d44241c             | lea                 eax, [esp + 0x1c]

        $sequence_2 = { 85c0 7411 e8???????? ba01000000 }
            // n = 4, score = 100
            //   85c0                 | test                eax, eax
            //   7411                 | je                  0x13
            //   e8????????           |                     
            //   ba01000000           | mov                 edx, 1

        $sequence_3 = { c785d0fdffff2c020000 ff15???????? 8bf0 8d85d0fdffff 50 56 89b5ccfdffff }
            // n = 7, score = 100
            //   c785d0fdffff2c020000     | mov    dword ptr [ebp - 0x230], 0x22c
            //   ff15????????         |                     
            //   8bf0                 | mov                 esi, eax
            //   8d85d0fdffff         | lea                 eax, [ebp - 0x230]
            //   50                   | push                eax
            //   56                   | push                esi
            //   89b5ccfdffff         | mov                 dword ptr [ebp - 0x234], esi

        $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 = { 8b442410 68???????? 50 8b08 ff9194000000 8b442410 }
            // n = 6, score = 100
            //   8b442410             | mov                 eax, dword ptr [esp + 0x10]
            //   68????????           |                     
            //   50                   | push                eax
            //   8b08                 | mov                 ecx, dword ptr [eax]
            //   ff9194000000         | call                dword ptr [ecx + 0x94]
            //   8b442410             | mov                 eax, dword ptr [esp + 0x10]

        $sequence_6 = { c785bcfdffff00000000 ff15???????? 0fb6c8 83f905 7715 7507 c1e808 }
            // n = 7, score = 100
            //   c785bcfdffff00000000     | mov    dword ptr [ebp - 0x244], 0
            //   ff15????????         |                     
            //   0fb6c8               | movzx               ecx, al
            //   83f905               | cmp                 ecx, 5
            //   7715                 | ja                  0x17
            //   7507                 | jne                 9
            //   c1e808               | shr                 eax, 8

        $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 = { ebce 68???????? ff35???????? ffd3 85c0 7477 }
            // n = 6, score = 100
            //   ebce                 | jmp                 0xffffffd0
            //   68????????           |                     
            //   ff35????????         |                     
            //   ffd3                 | call                ebx
            //   85c0                 | test                eax, eax
            //   7477                 | je                  0x79

        $sequence_9 = { c3 6884030000 6a00 6a00 }
            // n = 4, score = 100
            //   c3                   | ret                 
            //   6884030000           | push                0x384
            //   6a00                 | push                0
            //   6a00                 | push                0

    condition:
        7 of them and filesize < 114688
}