rule win_kuluoz_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2026-05-04"
        version = "1"
        description = "Detects win.kuluoz."
        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.kuluoz"
        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 = { 894dfc 6a40 6800300000 8b55fc 8b4250 50 8b4dfc }
            // n = 7, score = 100
            //   894dfc               | mov                 dword ptr [ebp - 4], ecx
            //   6a40                 | push                0x40
            //   6800300000           | push                0x3000
            //   8b55fc               | mov                 edx, dword ptr [ebp - 4]
            //   8b4250               | mov                 eax, dword ptr [edx + 0x50]
            //   50                   | push                eax
            //   8b4dfc               | mov                 ecx, dword ptr [ebp - 4]

        $sequence_1 = { eb14 837dec00 740e 6a00 6a00 8b45cc 50 }
            // n = 7, score = 100
            //   eb14                 | jmp                 0x16
            //   837dec00             | cmp                 dword ptr [ebp - 0x14], 0
            //   740e                 | je                  0x10
            //   6a00                 | push                0
            //   6a00                 | push                0
            //   8b45cc               | mov                 eax, dword ptr [ebp - 0x34]
            //   50                   | push                eax

        $sequence_2 = { 83c201 a1???????? 8910 8d8decfbffff 51 }
            // n = 5, score = 100
            //   83c201               | add                 edx, 1
            //   a1????????           |                     
            //   8910                 | mov                 dword ptr [eax], edx
            //   8d8decfbffff         | lea                 ecx, [ebp - 0x414]
            //   51                   | push                ecx

        $sequence_3 = { 750d 8b4d08 c7814a12000004000000 c645ff00 8b5508 83ba4e12000001 7558 }
            // n = 7, score = 100
            //   750d                 | jne                 0xf
            //   8b4d08               | mov                 ecx, dword ptr [ebp + 8]
            //   c7814a12000004000000     | mov    dword ptr [ecx + 0x124a], 4
            //   c645ff00             | mov                 byte ptr [ebp - 1], 0
            //   8b5508               | mov                 edx, dword ptr [ebp + 8]
            //   83ba4e12000001       | cmp                 dword ptr [edx + 0x124e], 1
            //   7558                 | jne                 0x5a

        $sequence_4 = { 8b4008 898564fbffff 8b8d5cfbffff 898decfbffff 8b9560fbffff 8995f0fbffff }
            // n = 6, score = 100
            //   8b4008               | mov                 eax, dword ptr [eax + 8]
            //   898564fbffff         | mov                 dword ptr [ebp - 0x49c], eax
            //   8b8d5cfbffff         | mov                 ecx, dword ptr [ebp - 0x4a4]
            //   898decfbffff         | mov                 dword ptr [ebp - 0x414], ecx
            //   8b9560fbffff         | mov                 edx, dword ptr [ebp - 0x4a0]
            //   8995f0fbffff         | mov                 dword ptr [ebp - 0x410], edx

        $sequence_5 = { 8945f0 8b4de8 894df4 8b55ec 8955f8 8b45f0 }
            // n = 6, score = 100
            //   8945f0               | mov                 dword ptr [ebp - 0x10], eax
            //   8b4de8               | mov                 ecx, dword ptr [ebp - 0x18]
            //   894df4               | mov                 dword ptr [ebp - 0xc], ecx
            //   8b55ec               | mov                 edx, dword ptr [ebp - 0x14]
            //   8955f8               | mov                 dword ptr [ebp - 8], edx
            //   8b45f0               | mov                 eax, dword ptr [ebp - 0x10]

        $sequence_6 = { 8b4508 e9???????? 8b550c 8b02 8b4d0c 034104 8945f0 }
            // n = 7, score = 100
            //   8b4508               | mov                 eax, dword ptr [ebp + 8]
            //   e9????????           |                     
            //   8b550c               | mov                 edx, dword ptr [ebp + 0xc]
            //   8b02                 | mov                 eax, dword ptr [edx]
            //   8b4d0c               | mov                 ecx, dword ptr [ebp + 0xc]
            //   034104               | add                 eax, dword ptr [ecx + 4]
            //   8945f0               | mov                 dword ptr [ebp - 0x10], eax

        $sequence_7 = { 8945fc e8???????? 0fb64508 85c0 }
            // n = 4, score = 100
            //   8945fc               | mov                 dword ptr [ebp - 4], eax
            //   e8????????           |                     
            //   0fb64508             | movzx               eax, byte ptr [ebp + 8]
            //   85c0                 | test                eax, eax

        $sequence_8 = { e8???????? 89852cfeffff 8b852cfeffff 50 }
            // n = 4, score = 100
            //   e8????????           |                     
            //   89852cfeffff         | mov                 dword ptr [ebp - 0x1d4], eax
            //   8b852cfeffff         | mov                 eax, dword ptr [ebp - 0x1d4]
            //   50                   | push                eax

        $sequence_9 = { 8b4dfc 894df4 8b55f4 813a436d644c 7514 8b45f4 817804696e653a }
            // n = 7, score = 100
            //   8b4dfc               | mov                 ecx, dword ptr [ebp - 4]
            //   894df4               | mov                 dword ptr [ebp - 0xc], ecx
            //   8b55f4               | mov                 edx, dword ptr [ebp - 0xc]
            //   813a436d644c         | cmp                 dword ptr [edx], 0x4c646d43
            //   7514                 | jne                 0x16
            //   8b45f4               | mov                 eax, dword ptr [ebp - 0xc]
            //   817804696e653a       | cmp                 dword ptr [eax + 4], 0x3a656e69

    condition:
        7 of them and filesize < 65536
}