rule win_lumar_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2026-09-17"
        version = "1"
        description = "Detects win.lumar."
        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.lumar"
        malpedia_rule_date = "20260916"
        malpedia_hash = "53a643781c18e08f4a50949af60172d837a0b6f6"
        malpedia_version = "20260917"
        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 = { b9???????? e8???????? 66ba0100 b9???????? e8???????? c645fe40 }
            // n = 6, score = 100
            //   b9????????           |                     
            //   e8????????           |                     
            //   66ba0100             | mov                 dx, 1
            //   b9????????           |                     
            //   e8????????           |                     
            //   c645fe40             | mov                 byte ptr [ebp - 2], 0x40

        $sequence_1 = { 50 8d859cfcffff 50 6a00 ff15???????? 85c0 7c16 }
            // n = 7, score = 100
            //   50                   | push                eax
            //   8d859cfcffff         | lea                 eax, [ebp - 0x364]
            //   50                   | push                eax
            //   6a00                 | push                0
            //   ff15????????         |                     
            //   85c0                 | test                eax, eax
            //   7c16                 | jl                  0x18

        $sequence_2 = { e9???????? b84d5a0000 663906 0f85c9000000 8b463c }
            // n = 5, score = 100
            //   e9????????           |                     
            //   b84d5a0000           | mov                 eax, 0x5a4d
            //   663906               | cmp                 word ptr [esi], ax
            //   0f85c9000000         | jne                 0xcf
            //   8b463c               | mov                 eax, dword ptr [esi + 0x3c]

        $sequence_3 = { 83c104 8b55f8 03c1 83c604 894d08 3b450c }
            // n = 6, score = 100
            //   83c104               | add                 ecx, 4
            //   8b55f8               | mov                 edx, dword ptr [ebp - 8]
            //   03c1                 | add                 eax, ecx
            //   83c604               | add                 esi, 4
            //   894d08               | mov                 dword ptr [ebp + 8], ecx
            //   3b450c               | cmp                 eax, dword ptr [ebp + 0xc]

        $sequence_4 = { 8bc1 8945fc 393d???????? 7533 53 56 8bf7 }
            // n = 7, score = 100
            //   8bc1                 | mov                 eax, ecx
            //   8945fc               | mov                 dword ptr [ebp - 4], eax
            //   393d????????         |                     
            //   7533                 | jne                 0x35
            //   53                   | push                ebx
            //   56                   | push                esi
            //   8bf7                 | mov                 esi, edi

        $sequence_5 = { 0f46f0 807d0c00 0fb7f6 740a 8bc6 3bc7 7504 }
            // n = 7, score = 100
            //   0f46f0               | cmovbe              esi, eax
            //   807d0c00             | cmp                 byte ptr [ebp + 0xc], 0
            //   0fb7f6               | movzx               esi, si
            //   740a                 | je                  0xc
            //   8bc6                 | mov                 eax, esi
            //   3bc7                 | cmp                 eax, edi
            //   7504                 | jne                 6

        $sequence_6 = { eb08 8a45ff 0401 8845ff 0fb645ff 3b45f4 7d2a }
            // n = 7, score = 100
            //   eb08                 | jmp                 0xa
            //   8a45ff               | mov                 al, byte ptr [ebp - 1]
            //   0401                 | add                 al, 1
            //   8845ff               | mov                 byte ptr [ebp - 1], al
            //   0fb645ff             | movzx               eax, byte ptr [ebp - 1]
            //   3b45f4               | cmp                 eax, dword ptr [ebp - 0xc]
            //   7d2a                 | jge                 0x2c

        $sequence_7 = { 885df2 e8???????? 3c0a 0f8531020000 ba???????? 8d4dec e8???????? }
            // n = 7, score = 100
            //   885df2               | mov                 byte ptr [ebp - 0xe], bl
            //   e8????????           |                     
            //   3c0a                 | cmp                 al, 0xa
            //   0f8531020000         | jne                 0x237
            //   ba????????           |                     
            //   8d4dec               | lea                 ecx, [ebp - 0x14]
            //   e8????????           |                     

        $sequence_8 = { 8b0d???????? e8???????? c645ff01 eb0d 68e8030000 ff15???????? eb85 }
            // n = 7, score = 100
            //   8b0d????????         |                     
            //   e8????????           |                     
            //   c645ff01             | mov                 byte ptr [ebp - 1], 1
            //   eb0d                 | jmp                 0xf
            //   68e8030000           | push                0x3e8
            //   ff15????????         |                     
            //   eb85                 | jmp                 0xffffff87

        $sequence_9 = { 8b45ec 8b4df8 25ff7f0000 0fb79c4100000300 }
            // n = 4, score = 100
            //   8b45ec               | mov                 eax, dword ptr [ebp - 0x14]
            //   8b4df8               | mov                 ecx, dword ptr [ebp - 8]
            //   25ff7f0000           | and                 eax, 0x7fff
            //   0fb79c4100000300     | movzx               ebx, word ptr [ecx + eax*2 + 0x30000]

    condition:
        7 of them and filesize < 81920
}