rule win_killada_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2026-09-17"
        version = "1"
        description = "Detects win.killada."
        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.killada"
        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 = { c5fc114628 c5fc114e50 48894670 4881c438010000 5b 5f }
            // n = 6, score = 100
            //   c5fc114628           | movzx               eax, al
            //   c5fc114e50           | dec                 eax
            //   48894670             | lea                 edx, [0x5314e]
            //   4881c438010000       | lea                 ecx, [eax*4]
            //   5b                   | test                al, al
            //   5f                   | vmovdqu             xmmword ptr [ebx + 0xc8], xmm0

        $sequence_1 = { 488b5708 7426 41bd01000000 4889d6 ba01000000 4c89e1 e8???????? }
            // n = 7, score = 100
            //   488b5708             | dec                 eax
            //   7426                 | mov                 edx, dword ptr [ebx + 0x18]
            //   41bd01000000         | inc                 esp
            //   4889d6               | mov                 edx, dword ptr [edx + 0xc]
            //   ba01000000           | inc                 ecx
            //   4c89e1               | cmp                 edx, 0xfde9
            //   e8????????           |                     

        $sequence_2 = { 4c8d0d9dd70400 488d2c33 4c89f9 4c89e2 4989f8 e8???????? 4989d1 }
            // n = 7, score = 100
            //   4c8d0d9dd70400       | lea                 eax, [0x49c6f]
            //   488d2c33             | inc                 ecx
            //   4c89f9               | mov                 ecx, 4
            //   4c89e2               | dec                 eax
            //   4989f8               | mov                 ecx, ebp
            //   e8????????           |                     
            //   4989d1               | dec                 esp

        $sequence_3 = { e8???????? 48894dd0 ba01000000 4889f1 e8???????? 4885c0 0f846d020000 }
            // n = 7, score = 100
            //   e8????????           |                     
            //   48894dd0             | test                eax, eax
            //   ba01000000           | inc                 ecx
            //   4889f1               | mov                 dh, 1
            //   e8????????           |                     
            //   4885c0               | dec                 ecx
            //   0f846d020000         | cmp                 dword ptr [esp], 1

        $sequence_4 = { 8605???????? 3c02 742c 4883c450 5d c3 e8???????? }
            // n = 7, score = 100
            //   8605????????         |                     
            //   3c02                 | jne                 0x13e4
            //   742c                 | dec                 eax
            //   4883c450             | mov                 dword ptr [ebp - 0x18], edx
            //   5d                   | dec                 eax
            //   c3                   | test                eax, eax
            //   e8????????           |                     

        $sequence_5 = { c3 ba20000000 4889c1 e8???????? cc 56 57 }
            // n = 7, score = 100
            //   c3                   | mov                 dword ptr [ebp - 0x20], edi
            //   ba20000000           | dec                 esp
            //   4889c1               | lea                 esi, [edi + 0x18]
            //   e8????????           |                     
            //   cc                   | mov                 edi, dword ptr [esi + 0x10]
            //   56                   | test                edi, 0x800000
            //   57                   | jne                 0x226

        $sequence_6 = { 488d4c2420 488906 e8???????? 4889f9 4883c438 5b 5f }
            // n = 7, score = 100
            //   488d4c2420           | lea                 edx, [0x4c92f]
            //   488906               | push                esi
            //   e8????????           |                     
            //   4889f9               | push                edi
            //   4883c438             | dec                 eax
            //   5b                   | sub                 esp, 0x38
            //   5f                   | dec                 eax

        $sequence_7 = { eb9f 4883c202 4c39e0 480f44d0 31c0 4c39e2 0f95c0 }
            // n = 7, score = 100
            //   eb9f                 | add                 edx, 2
            //   4883c202             | dec                 esp
            //   4c39e0               | cmp                 eax, esp
            //   480f44d0             | dec                 eax
            //   31c0                 | cmovne              eax, edx
            //   4c39e2               | inc                 ecx
            //   0f95c0               | mov                 ecx, 2

        $sequence_8 = { 4989c0 4c0f43c6 4f890ce0 4983dcff 4883c108 ebd8 4d39ee }
            // n = 7, score = 100
            //   4989c0               | inc                 ecx
            //   4c0f43c6             | shl                 ebx, 0xc
            //   4f890ce0             | inc                 ebp
            //   4983dcff             | or                  edx, ebx
            //   4883c108             | inc                 ecx
            //   ebd8                 | lea                 ecx, [edx - 0x3a]
            //   4d39ee               | cmp                 ecx, -0xa

        $sequence_9 = { 4c89f1 4889442468 e8???????? 4c89f1 e8???????? 4c89e1 4889442450 }
            // n = 7, score = 100
            //   4c89f1               | dec                 esp
            //   4889442468           | mov                 dword ptr [ebp + 0x550], esi
            //   e8????????           |                     
            //   4c89f1               | dec                 ecx
            //   e8????????           |                     
            //   4c89e1               | cmp                 esi, ecx
            //   4889442450           | jne                 0x6c9

    condition:
        7 of them and filesize < 1188864
}