rule win_kegotip_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2023-03-28"
        version = "1"
        description = "Detects win.kegotip."
        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.kegotip"
        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 = { 6a00 8d8dd8feffff 51 ff15???????? c745f80040e428 c745fc80050000 }
            // n = 6, score = 600
            //   6a00                 | push                0
            //   8d8dd8feffff         | lea                 ecx, [ebp - 0x128]
            //   51                   | push                ecx
            //   ff15????????         |                     
            //   c745f80040e428       | mov                 dword ptr [ebp - 8], 0x28e44000
            //   c745fc80050000       | mov                 dword ptr [ebp - 4], 0x580

        $sequence_1 = { 8b45f8 2d???????? 8845ff 8b4d08 83c101 }
            // n = 5, score = 600
            //   8b45f8               | mov                 eax, dword ptr [ebp - 8]
            //   2d????????           |                     
            //   8845ff               | mov                 byte ptr [ebp - 1], al
            //   8b4d08               | mov                 ecx, dword ptr [ebp + 8]
            //   83c101               | add                 ecx, 1

        $sequence_2 = { 3b4514 7304 33c0 eb58 c745fc00000000 c745f800000000 }
            // n = 6, score = 600
            //   3b4514               | cmp                 eax, dword ptr [ebp + 0x14]
            //   7304                 | jae                 6
            //   33c0                 | xor                 eax, eax
            //   eb58                 | jmp                 0x5a
            //   c745fc00000000       | mov                 dword ptr [ebp - 4], 0
            //   c745f800000000       | mov                 dword ptr [ebp - 8], 0

        $sequence_3 = { e8???????? 83c404 3945f4 733a }
            // n = 4, score = 600
            //   e8????????           |                     
            //   83c404               | add                 esp, 4
            //   3945f4               | cmp                 dword ptr [ebp - 0xc], eax
            //   733a                 | jae                 0x3c

        $sequence_4 = { eb05 83c8ff eb1e 6a10 }
            // n = 4, score = 600
            //   eb05                 | jmp                 7
            //   83c8ff               | or                  eax, 0xffffffff
            //   eb1e                 | jmp                 0x20
            //   6a10                 | push                0x10

        $sequence_5 = { c785e8feffff04010000 6a00 6a00 6a00 6a00 8d95e8feffff }
            // n = 6, score = 600
            //   c785e8feffff04010000     | mov    dword ptr [ebp - 0x118], 0x104
            //   6a00                 | push                0
            //   6a00                 | push                0
            //   6a00                 | push                0
            //   6a00                 | push                0
            //   8d95e8feffff         | lea                 edx, [ebp - 0x118]

        $sequence_6 = { 8b4508 f7400406000000 0f859e000000 8945f8 8b4510 8945fc 8d45f8 }
            // n = 7, score = 600
            //   8b4508               | mov                 eax, dword ptr [ebp + 8]
            //   f7400406000000       | test                dword ptr [eax + 4], 6
            //   0f859e000000         | jne                 0xa4
            //   8945f8               | mov                 dword ptr [ebp - 8], eax
            //   8b4510               | mov                 eax, dword ptr [ebp + 0x10]
            //   8945fc               | mov                 dword ptr [ebp - 4], eax
            //   8d45f8               | lea                 eax, [ebp - 8]

        $sequence_7 = { e8???????? 83c40c c68567feffff00 8d8578feffff }
            // n = 4, score = 600
            //   e8????????           |                     
            //   83c40c               | add                 esp, 0xc
            //   c68567feffff00       | mov                 byte ptr [ebp - 0x199], 0
            //   8d8578feffff         | lea                 eax, [ebp - 0x188]

        $sequence_8 = { ff15???????? c645ff01 8b45f0 50 ff15???????? }
            // n = 5, score = 600
            //   ff15????????         |                     
            //   c645ff01             | mov                 byte ptr [ebp - 1], 1
            //   8b45f0               | mov                 eax, dword ptr [ebp - 0x10]
            //   50                   | push                eax
            //   ff15????????         |                     

        $sequence_9 = { 6a00 8d55fc 52 e8???????? 83c40c }
            // n = 5, score = 600
            //   6a00                 | push                0
            //   8d55fc               | lea                 edx, [ebp - 4]
            //   52                   | push                edx
            //   e8????????           |                     
            //   83c40c               | add                 esp, 0xc

    condition:
        7 of them and filesize < 278528
}