rule win_dexter_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2023-01-25"
        version = "1"
        description = "Detects win.dexter."
        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.dexter"
        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 = { 50 e8???????? 68???????? e8???????? 83c404 83f801 }
            // n = 6, score = 400
            //   50                   | push                eax
            //   e8????????           |                     
            //   68????????           |                     
            //   e8????????           |                     
            //   83c404               | add                 esp, 4
            //   83f801               | cmp                 eax, 1

        $sequence_1 = { 833d????????00 764c a1???????? 2b05???????? a3???????? 8b0d???????? }
            // n = 6, score = 400
            //   833d????????00       |                     
            //   764c                 | jbe                 0x4e
            //   a1????????           |                     
            //   2b05????????         |                     
            //   a3????????           |                     
            //   8b0d????????         |                     

        $sequence_2 = { e9???????? 833d????????00 741e 8b0d???????? 51 ff15???????? 85c0 }
            // n = 7, score = 400
            //   e9????????           |                     
            //   833d????????00       |                     
            //   741e                 | je                  0x20
            //   8b0d????????         |                     
            //   51                   | push                ecx
            //   ff15????????         |                     
            //   85c0                 | test                eax, eax

        $sequence_3 = { ff15???????? a3???????? 6a05 68???????? e8???????? }
            // n = 5, score = 400
            //   ff15????????         |                     
            //   a3????????           |                     
            //   6a05                 | push                5
            //   68????????           |                     
            //   e8????????           |                     

        $sequence_4 = { e9???????? 8b0d???????? 3b0d???????? 740e 8b15???????? 3b15???????? }
            // n = 6, score = 400
            //   e9????????           |                     
            //   8b0d????????         |                     
            //   3b0d????????         |                     
            //   740e                 | je                  0x10
            //   8b15????????         |                     
            //   3b15????????         |                     

        $sequence_5 = { 83c404 83f801 7505 e9???????? 8b0d???????? 3b0d???????? 740e }
            // n = 7, score = 400
            //   83c404               | add                 esp, 4
            //   83f801               | cmp                 eax, 1
            //   7505                 | jne                 7
            //   e9????????           |                     
            //   8b0d????????         |                     
            //   3b0d????????         |                     
            //   740e                 | je                  0x10

        $sequence_6 = { 8b15???????? 8955fc 8b45fc 50 ff15???????? 8b0d???????? }
            // n = 6, score = 400
            //   8b15????????         |                     
            //   8955fc               | mov                 dword ptr [ebp - 4], edx
            //   8b45fc               | mov                 eax, dword ptr [ebp - 4]
            //   50                   | push                eax
            //   ff15????????         |                     
            //   8b0d????????         |                     

        $sequence_7 = { ff15???????? 85c0 750a 6a01 e8???????? 83c404 68d0070000 }
            // n = 7, score = 400
            //   ff15????????         |                     
            //   85c0                 | test                eax, eax
            //   750a                 | jne                 0xc
            //   6a01                 | push                1
            //   e8????????           |                     
            //   83c404               | add                 esp, 4
            //   68d0070000           | push                0x7d0

        $sequence_8 = { 50 8b4d10 51 ff15???????? 8b55f8 52 8b4510 }
            // n = 7, score = 400
            //   50                   | push                eax
            //   8b4d10               | mov                 ecx, dword ptr [ebp + 0x10]
            //   51                   | push                ecx
            //   ff15????????         |                     
            //   8b55f8               | mov                 edx, dword ptr [ebp - 8]
            //   52                   | push                edx
            //   8b4510               | mov                 eax, dword ptr [ebp + 0x10]

        $sequence_9 = { 51 ff15???????? 85c0 750a 6a01 e8???????? }
            // n = 6, score = 400
            //   51                   | push                ecx
            //   ff15????????         |                     
            //   85c0                 | test                eax, eax
            //   750a                 | jne                 0xc
            //   6a01                 | push                1
            //   e8????????           |                     

    condition:
        7 of them and filesize < 98304
}