rule win_webc2_kt3_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2023-03-28"
        version = "1"
        description = "Detects win.webc2_kt3."
        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.webc2_kt3"
        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 = { 8b8d0cfcffff 894de8 90 f8 }
            // n = 4, score = 100
            //   8b8d0cfcffff         | mov                 ecx, dword ptr [ebp - 0x3f4]
            //   894de8               | mov                 dword ptr [ebp - 0x18], ecx
            //   90                   | nop                 
            //   f8                   | clc                 

        $sequence_1 = { 0f8502000000 ebe9 8b45dc 8b480c 51 }
            // n = 5, score = 100
            //   0f8502000000         | jne                 8
            //   ebe9                 | jmp                 0xffffffeb
            //   8b45dc               | mov                 eax, dword ptr [ebp - 0x24]
            //   8b480c               | mov                 ecx, dword ptr [eax + 0xc]
            //   51                   | push                ecx

        $sequence_2 = { 8d8decfeffff 51 e8???????? 83c40c 0f8408000000 }
            // n = 5, score = 100
            //   8d8decfeffff         | lea                 ecx, [ebp - 0x114]
            //   51                   | push                ecx
            //   e8????????           |                     
            //   83c40c               | add                 esp, 0xc
            //   0f8408000000         | je                  0xe

        $sequence_3 = { f7d8 83da00 5b c21000 833d????????00 7505 }
            // n = 6, score = 100
            //   f7d8                 | neg                 eax
            //   83da00               | sbb                 edx, 0
            //   5b                   | pop                 ebx
            //   c21000               | ret                 0x10
            //   833d????????00       |                     
            //   7505                 | jne                 7

        $sequence_4 = { e9???????? 8b45dc 8b4810 894df4 }
            // n = 4, score = 100
            //   e9????????           |                     
            //   8b45dc               | mov                 eax, dword ptr [ebp - 0x24]
            //   8b4810               | mov                 ecx, dword ptr [eax + 0x10]
            //   894df4               | mov                 dword ptr [ebp - 0xc], ecx

        $sequence_5 = { 66c745c80000 c745cc00000000 66c745ca0000 c745c401010000 8b4508 }
            // n = 5, score = 100
            //   66c745c80000         | mov                 word ptr [ebp - 0x38], 0
            //   c745cc00000000       | mov                 dword ptr [ebp - 0x34], 0
            //   66c745ca0000         | mov                 word ptr [ebp - 0x36], 0
            //   c745c401010000       | mov                 dword ptr [ebp - 0x3c], 0x101
            //   8b4508               | mov                 eax, dword ptr [ebp + 8]

        $sequence_6 = { e9???????? 8b4de8 0fbe11 83fa7a 750e 8b4508 }
            // n = 6, score = 100
            //   e9????????           |                     
            //   8b4de8               | mov                 ecx, dword ptr [ebp - 0x18]
            //   0fbe11               | movsx               edx, byte ptr [ecx]
            //   83fa7a               | cmp                 edx, 0x7a
            //   750e                 | jne                 0x10
            //   8b4508               | mov                 eax, dword ptr [ebp + 8]

        $sequence_7 = { 83c40c 0f8408000000 0f8502000000 ebe9 8dbdecfeffff }
            // n = 5, score = 100
            //   83c40c               | add                 esp, 0xc
            //   0f8408000000         | je                  0xe
            //   0f8502000000         | jne                 8
            //   ebe9                 | jmp                 0xffffffeb
            //   8dbdecfeffff         | lea                 edi, [ebp - 0x114]

        $sequence_8 = { 51 ff15???????? 8b55e8 0fbe02 }
            // n = 4, score = 100
            //   51                   | push                ecx
            //   ff15????????         |                     
            //   8b55e8               | mov                 edx, dword ptr [ebp - 0x18]
            //   0fbe02               | movsx               eax, byte ptr [edx]

        $sequence_9 = { 8b5104 52 ff15???????? 85c0 7502 eb05 e9???????? }
            // n = 7, score = 100
            //   8b5104               | mov                 edx, dword ptr [ecx + 4]
            //   52                   | push                edx
            //   ff15????????         |                     
            //   85c0                 | test                eax, eax
            //   7502                 | jne                 4
            //   eb05                 | jmp                 7
            //   e9????????           |                     

    condition:
        7 of them and filesize < 114688
}