rule win_goopic_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2023-03-28"
        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 = "20230328"
        malpedia_hash = "9d2d75cef573c1c2d861f5197df8f563b05a305d"
        malpedia_version = "20230407"
        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 ff15???????? 8d85f8b7ffff 50 6a00 6a00 6a06 }
            // n = 7, score = 100
            //   50                   | push                eax
            //   ff15????????         |                     
            //   8d85f8b7ffff         | lea                 eax, [ebp - 0x4808]
            //   50                   | push                eax
            //   6a00                 | push                0
            //   6a00                 | push                0
            //   6a06                 | push                6

        $sequence_1 = { 6a00 68???????? ff742420 ff15???????? ff74240c ff15???????? 6a00 }
            // n = 7, score = 100
            //   6a00                 | push                0
            //   68????????           |                     
            //   ff742420             | push                dword ptr [esp + 0x20]
            //   ff15????????         |                     
            //   ff74240c             | push                dword ptr [esp + 0xc]
            //   ff15????????         |                     
            //   6a00                 | push                0

        $sequence_2 = { 0f85e8010000 8b7e3c 03fe 813f50450000 0f85d7010000 }
            // n = 5, score = 100
            //   0f85e8010000         | jne                 0x1ee
            //   8b7e3c               | mov                 edi, dword ptr [esi + 0x3c]
            //   03fe                 | add                 edi, esi
            //   813f50450000         | cmp                 dword ptr [edi], 0x4550
            //   0f85d7010000         | jne                 0x1dd

        $sequence_3 = { 8b35???????? 8da42400000000 8d85f8efffff c785f8efffff00000000 50 }
            // n = 5, score = 100
            //   8b35????????         |                     
            //   8da42400000000       | lea                 esp, [esp]
            //   8d85f8efffff         | lea                 eax, [ebp - 0x1008]
            //   c785f8efffff00000000     | mov    dword ptr [ebp - 0x1008], 0
            //   50                   | push                eax

        $sequence_4 = { ffd7 85c0 0f85b9000000 68???????? }
            // n = 4, score = 100
            //   ffd7                 | call                edi
            //   85c0                 | test                eax, eax
            //   0f85b9000000         | jne                 0xbf
            //   68????????           |                     

        $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 = { 6a00 ffd7 8d842448090000 50 }
            // n = 4, score = 100
            //   6a00                 | push                0
            //   ffd7                 | call                edi
            //   8d842448090000       | lea                 eax, [esp + 0x948]
            //   50                   | push                eax

        $sequence_7 = { 8b442410 6a00 50 8b08 ff91ac000000 8b442410 }
            // n = 6, score = 100
            //   8b442410             | mov                 eax, dword ptr [esp + 0x10]
            //   6a00                 | push                0
            //   50                   | push                eax
            //   8b08                 | mov                 ecx, dword ptr [eax]
            //   ff91ac000000         | call                dword ptr [ecx + 0xac]
            //   8b442410             | mov                 eax, dword ptr [esp + 0x10]

        $sequence_8 = { 83e802 7446 48 7423 48 7576 }
            // n = 6, score = 100
            //   83e802               | sub                 eax, 2
            //   7446                 | je                  0x48
            //   48                   | dec                 eax
            //   7423                 | je                  0x25
            //   48                   | dec                 eax
            //   7576                 | jne                 0x78

        $sequence_9 = { 50 ffd7 85c0 0f853b020000 68???????? e8???????? 50 }
            // n = 7, score = 100
            //   50                   | push                eax
            //   ffd7                 | call                edi
            //   85c0                 | test                eax, eax
            //   0f853b020000         | jne                 0x241
            //   68????????           |                     
            //   e8????????           |                     
            //   50                   | push                eax

    condition:
        7 of them and filesize < 114688
}