rule win_kegotip_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2026-05-04"
        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 = "20260422"
        malpedia_hash = "a182e35da64e6d71cb55f125c4d4225196523f14"
        malpedia_version = "20260504"
        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 = { 6800800000 6a00 ff15???????? a3???????? 833d????????00 752d 8b0d???????? }
            // n = 7, score = 600
            //   6800800000           | push                0x8000
            //   6a00                 | push                0
            //   ff15????????         |                     
            //   a3????????           |                     
            //   833d????????00       |                     
            //   752d                 | jne                 0x2f
            //   8b0d????????         |                     

        $sequence_1 = { 50 64892500000000 81c4e4feffff 53 }
            // n = 4, score = 600
            //   50                   | push                eax
            //   64892500000000       | mov                 dword ptr fs:[0], esp
            //   81c4e4feffff         | add                 esp, 0xfffffee4
            //   53                   | push                ebx

        $sequence_2 = { 83c408 8d95f8feffff 52 8b4508 50 ff15???????? }
            // n = 6, score = 600
            //   83c408               | add                 esp, 8
            //   8d95f8feffff         | lea                 edx, [ebp - 0x108]
            //   52                   | push                edx
            //   8b4508               | mov                 eax, dword ptr [ebp + 8]
            //   50                   | push                eax
            //   ff15????????         |                     

        $sequence_3 = { c78570ffffff01000000 8b9570ffffff 895580 8b4580 6bc014 }
            // n = 5, score = 600
            //   c78570ffffff01000000     | mov    dword ptr [ebp - 0x90], 1
            //   8b9570ffffff         | mov                 edx, dword ptr [ebp - 0x90]
            //   895580               | mov                 dword ptr [ebp - 0x80], edx
            //   8b4580               | mov                 eax, dword ptr [ebp - 0x80]
            //   6bc014               | imul                eax, eax, 0x14

        $sequence_4 = { 7408 8b450c 3b4514 7604 }
            // n = 4, score = 600
            //   7408                 | je                  0xa
            //   8b450c               | mov                 eax, dword ptr [ebp + 0xc]
            //   3b4514               | cmp                 eax, dword ptr [ebp + 0x14]
            //   7604                 | jbe                 6

        $sequence_5 = { 8b4d08 034d8c 0fb611 52 e8???????? 83c404 0fb6c0 }
            // n = 7, score = 600
            //   8b4d08               | mov                 ecx, dword ptr [ebp + 8]
            //   034d8c               | add                 ecx, dword ptr [ebp - 0x74]
            //   0fb611               | movzx               edx, byte ptr [ecx]
            //   52                   | push                edx
            //   e8????????           |                     
            //   83c404               | add                 esp, 4
            //   0fb6c0               | movzx               eax, al

        $sequence_6 = { c785f8fdffffff000000 eb09 8b4510 8985f8fdffff 8b8df8fdffff 894d10 }
            // n = 6, score = 600
            //   c785f8fdffffff000000     | mov    dword ptr [ebp - 0x208], 0xff
            //   eb09                 | jmp                 0xb
            //   8b4510               | mov                 eax, dword ptr [ebp + 0x10]
            //   8985f8fdffff         | mov                 dword ptr [ebp - 0x208], eax
            //   8b8df8fdffff         | mov                 ecx, dword ptr [ebp - 0x208]
            //   894d10               | mov                 dword ptr [ebp + 0x10], ecx

        $sequence_7 = { 8dbd4cfbffff f3a5 a4 a1???????? 898540fbffff b915000000 }
            // n = 6, score = 600
            //   8dbd4cfbffff         | lea                 edi, [ebp - 0x4b4]
            //   f3a5                 | rep movsd           dword ptr es:[edi], dword ptr [esi]
            //   a4                   | movsb               byte ptr es:[edi], byte ptr [esi]
            //   a1????????           |                     
            //   898540fbffff         | mov                 dword ptr [ebp - 0x4c0], eax
            //   b915000000           | mov                 ecx, 0x15

        $sequence_8 = { 56 8b4508 0fb608 894df8 8b55f8 c1e208 }
            // n = 6, score = 600
            //   56                   | push                esi
            //   8b4508               | mov                 eax, dword ptr [ebp + 8]
            //   0fb608               | movzx               ecx, byte ptr [eax]
            //   894df8               | mov                 dword ptr [ebp - 8], ecx
            //   8b55f8               | mov                 edx, dword ptr [ebp - 8]
            //   c1e208               | shl                 edx, 8

        $sequence_9 = { 3b4dfc 7324 8b5510 0355e4 8b45f4 0345f8 }
            // n = 6, score = 600
            //   3b4dfc               | cmp                 ecx, dword ptr [ebp - 4]
            //   7324                 | jae                 0x26
            //   8b5510               | mov                 edx, dword ptr [ebp + 0x10]
            //   0355e4               | add                 edx, dword ptr [ebp - 0x1c]
            //   8b45f4               | mov                 eax, dword ptr [ebp - 0xc]
            //   0345f8               | add                 eax, dword ptr [ebp - 8]

    condition:
        7 of them and filesize < 278528
}