rule win_goldenspy_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2023-01-25"
        version = "1"
        description = "Detects win.goldenspy."
        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.goldenspy"
        malpedia_rule_date = "20230124"
        malpedia_hash = "2ee0eebba83dce3d019a90519f2f972c0fcf9686"
        malpedia_version = "20230125"
        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 = { ff500c 85c0 b914020090 5e 0f45c8 8bc1 5d }
            // n = 7, score = 100
            //   ff500c               | call                dword ptr [eax + 0xc]
            //   85c0                 | test                eax, eax
            //   b914020090           | mov                 ecx, 0x90000214
            //   5e                   | pop                 esi
            //   0f45c8               | cmovne              ecx, eax
            //   8bc1                 | mov                 eax, ecx
            //   5d                   | pop                 ebp

        $sequence_1 = { 7442 8b474c 33f6 85c0 742d 3bc3 7311 }
            // n = 7, score = 100
            //   7442                 | je                  0x44
            //   8b474c               | mov                 eax, dword ptr [edi + 0x4c]
            //   33f6                 | xor                 esi, esi
            //   85c0                 | test                eax, eax
            //   742d                 | je                  0x2f
            //   3bc3                 | cmp                 eax, ebx
            //   7311                 | jae                 0x13

        $sequence_2 = { 8b5d08 56 8bf1 57 8b4e10 3bd9 767b }
            // n = 7, score = 100
            //   8b5d08               | mov                 ebx, dword ptr [ebp + 8]
            //   56                   | push                esi
            //   8bf1                 | mov                 esi, ecx
            //   57                   | push                edi
            //   8b4e10               | mov                 ecx, dword ptr [esi + 0x10]
            //   3bd9                 | cmp                 ebx, ecx
            //   767b                 | jbe                 0x7d

        $sequence_3 = { 7424 6a00 8d45f0 50 33c0 85ff }
            // n = 6, score = 100
            //   7424                 | je                  0x26
            //   6a00                 | push                0
            //   8d45f0               | lea                 eax, [ebp - 0x10]
            //   50                   | push                eax
            //   33c0                 | xor                 eax, eax
            //   85ff                 | test                edi, edi

        $sequence_4 = { 52 51 e8???????? 83c408 8bb510feffff 837e2010 8d560c }
            // n = 7, score = 100
            //   52                   | push                edx
            //   51                   | push                ecx
            //   e8????????           |                     
            //   83c408               | add                 esp, 8
            //   8bb510feffff         | mov                 esi, dword ptr [ebp - 0x1f0]
            //   837e2010             | cmp                 dword ptr [esi + 0x20], 0x10
            //   8d560c               | lea                 edx, [esi + 0xc]

        $sequence_5 = { 8b5c2438 8b4c243c 03cb 3bd9 730e 8b550c }
            // n = 6, score = 100
            //   8b5c2438             | mov                 ebx, dword ptr [esp + 0x38]
            //   8b4c243c             | mov                 ecx, dword ptr [esp + 0x3c]
            //   03cb                 | add                 ecx, ebx
            //   3bd9                 | cmp                 ebx, ecx
            //   730e                 | jae                 0x10
            //   8b550c               | mov                 edx, dword ptr [ebp + 0xc]

        $sequence_6 = { 7413 8a02 8d4a01 894f48 8bd1 3c2a 7505 }
            // n = 7, score = 100
            //   7413                 | je                  0x15
            //   8a02                 | mov                 al, byte ptr [edx]
            //   8d4a01               | lea                 ecx, [edx + 1]
            //   894f48               | mov                 dword ptr [edi + 0x48], ecx
            //   8bd1                 | mov                 edx, ecx
            //   3c2a                 | cmp                 al, 0x2a
            //   7505                 | jne                 7

        $sequence_7 = { ff15???????? 85c0 7870 6a2c e8???????? 8bf0 }
            // n = 6, score = 100
            //   ff15????????         |                     
            //   85c0                 | test                eax, eax
            //   7870                 | js                  0x72
            //   6a2c                 | push                0x2c
            //   e8????????           |                     
            //   8bf0                 | mov                 esi, eax

        $sequence_8 = { c645d800 eb10 68???????? e8???????? 83c404 83ceff 8d8d50ffffff }
            // n = 7, score = 100
            //   c645d800             | mov                 byte ptr [ebp - 0x28], 0
            //   eb10                 | jmp                 0x12
            //   68????????           |                     
            //   e8????????           |                     
            //   83c404               | add                 esp, 4
            //   83ceff               | or                  esi, 0xffffffff
            //   8d8d50ffffff         | lea                 ecx, [ebp - 0xb0]

        $sequence_9 = { 83c408 85c0 741a 837e1410 8bd6 }
            // n = 5, score = 100
            //   83c408               | add                 esp, 8
            //   85c0                 | test                eax, eax
            //   741a                 | je                  0x1c
            //   837e1410             | cmp                 dword ptr [esi + 0x14], 0x10
            //   8bd6                 | mov                 edx, esi

    condition:
        7 of them and filesize < 1081344
}