rule win_veiledsignal_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2026-09-17"
        version = "1"
        description = "Detects win.veiledsignal."
        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.veiledsignal"
        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 = { 7571 488d058a000000 488905???????? 488d059d000000 488905???????? 488d05b0000000 }
            // n = 6, score = 100
            //   7571                 | jne                 0xa91
            //   488d058a000000       | dec                 eax
            //   488905????????       |                     
            //   488d059d000000       | lea                 ecx, [0x420]
            //   488905????????       |                     
            //   488d05b0000000       | mov                 eax, 1

        $sequence_1 = { 4c8bc1 b84d5a0000 66390585dcffff 7578 48630db8dcffff 488d1575dcffff 4803ca }
            // n = 7, score = 100
            //   4c8bc1               | dec                 esp
            //   b84d5a0000           | mov                 esi, ecx
            //   66390585dcffff       | dec                 eax
            //   7578                 | test                ecx, ecx
            //   48630db8dcffff       | je                  0x3a7
            //   488d1575dcffff       | xor                 ebx, ebx
            //   4803ca               | dec                 esp

        $sequence_2 = { 488d0daeb10400 baa00f0000 e8???????? 85c0 740a ff05???????? b001 }
            // n = 7, score = 100
            //   488d0daeb10400       | mov                 ecx, dword ptr [esp + 0x30]
            //   baa00f0000           | dec                 eax
            //   e8????????           |                     
            //   85c0                 | cmp                 ecx, eax
            //   740a                 | ljmp                0x2824:0x7c8b0000
            //   ff05????????         |                     
            //   b001                 | dec                 eax

        $sequence_3 = { 488bd9 4c8d0d2c850000 b903000000 4c8d0518850000 488d15116d0000 }
            // n = 5, score = 100
            //   488bd9               | lea                 edx, [0xffffdc75]
            //   4c8d0d2c850000       | dec                 eax
            //   b903000000           | add                 ecx, edx
            //   4c8d0518850000       | cmp                 dword ptr [ecx], 0x4550
            //   488d15116d0000       | jne                 0x2ac

        $sequence_4 = { 83f803 7571 488d0581010000 488905???????? 488d0594010000 488905???????? }
            // n = 6, score = 100
            //   83f803               | test                eax, eax
            //   7571                 | jne                 0xdb6
            //   488d0581010000       | dec                 eax
            //   488905????????       |                     
            //   488d0594010000       | lea                 ecx, [0x4bc9a]
            //   488905????????       |                     

        $sequence_5 = { e8???????? 4881c458010000 c3 8d8146b8ffff 83f801 }
            // n = 5, score = 100
            //   e8????????           |                     
            //   4881c458010000       | dec                 eax
            //   c3                   | mov                 eax, dword ptr [ebx]
            //   8d8146b8ffff         | dec                 eax
            //   83f801               | test                eax, eax

        $sequence_6 = { b8af000000 0f05 c3 4c8bd1 b823000000 0f05 c3 }
            // n = 7, score = 100
            //   b8af000000           | jne                 0x89e
            //   0f05                 | dec                 eax
            //   c3                   | lea                 edx, [0x6c34]
            //   4c8bd1               | mov                 ecx, 0x12
            //   b823000000           | mov                 edx, ebx
            //   0f05                 | dec                 eax
            //   c3                   | mov                 ecx, edi

        $sequence_7 = { 4489542444 81fae9fd0000 0f857e010000 4c8d3d055cffff }
            // n = 4, score = 100
            //   4489542444           | lea                 ecx, [0xacdc]
            //   81fae9fd0000         | inc                 eax
            //   0f857e010000         | push                ebx
            //   4c8d3d055cffff       | dec                 eax

        $sequence_8 = { 8bf9 488d157f6c0000 b906000000 4c8d054b840000 e8???????? 488bd3 8bcf }
            // n = 7, score = 100
            //   8bf9                 | lea                 ecx, [0xaa80]
            //   488d157f6c0000       | test                eax, eax
            //   b906000000           | je                  0x3ca
            //   4c8d054b840000       | mov                 edx, 1
            //   e8????????           |                     
            //   488bd3               | dec                 eax
            //   8bcf                 | mov                 ecx, ebp

        $sequence_9 = { 8b848654980000 4803c6 ffe0 660f73d901 eb60 }
            // n = 5, score = 100
            //   8b848654980000       | dec                 eax
            //   4803c6               | lea                 ecx, [0x4bc9a]
            //   ffe0                 | dec                 eax
            //   660f73d901           | lea                 ecx, [0xb797]
            //   eb60                 | test                eax, eax

    condition:
        7 of them and filesize < 667648
}