rule win_scranos_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2026-05-04"
        version = "1"
        description = "Detects win.scranos."
        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.scranos"
        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 = { 8b8f20030000 895004 8b9724030000 894808 8b4c242c 89500c 8b542430 }
            // n = 7, score = 100
            //   8b8f20030000         | mov                 ecx, dword ptr [edi + 0x320]
            //   895004               | mov                 dword ptr [eax + 4], edx
            //   8b9724030000         | mov                 edx, dword ptr [edi + 0x324]
            //   894808               | mov                 dword ptr [eax + 8], ecx
            //   8b4c242c             | mov                 ecx, dword ptr [esp + 0x2c]
            //   89500c               | mov                 dword ptr [eax + 0xc], edx
            //   8b542430             | mov                 edx, dword ptr [esp + 0x30]

        $sequence_1 = { 8d44242c 50 56 e8???????? 83c40c 8bd8 e8???????? }
            // n = 7, score = 100
            //   8d44242c             | lea                 eax, [esp + 0x2c]
            //   50                   | push                eax
            //   56                   | push                esi
            //   e8????????           |                     
            //   83c40c               | add                 esp, 0xc
            //   8bd8                 | mov                 ebx, eax
            //   e8????????           |                     

        $sequence_2 = { f7d9 1bc9 83c101 884de3 837d1400 0f8451010000 c745dc00000000 }
            // n = 7, score = 100
            //   f7d9                 | neg                 ecx
            //   1bc9                 | sbb                 ecx, ecx
            //   83c101               | add                 ecx, 1
            //   884de3               | mov                 byte ptr [ebp - 0x1d], cl
            //   837d1400             | cmp                 dword ptr [ebp + 0x14], 0
            //   0f8451010000         | je                  0x157
            //   c745dc00000000       | mov                 dword ptr [ebp - 0x24], 0

        $sequence_3 = { 8b8dbcfeffff 83c101 51 8b5510 52 8d45c0 50 }
            // n = 7, score = 100
            //   8b8dbcfeffff         | mov                 ecx, dword ptr [ebp - 0x144]
            //   83c101               | add                 ecx, 1
            //   51                   | push                ecx
            //   8b5510               | mov                 edx, dword ptr [ebp + 0x10]
            //   52                   | push                edx
            //   8d45c0               | lea                 eax, [ebp - 0x40]
            //   50                   | push                eax

        $sequence_4 = { 8d4dd4 e8???????? 50 8b4d2c e8???????? 8d4dd8 e8???????? }
            // n = 7, score = 100
            //   8d4dd4               | lea                 ecx, [ebp - 0x2c]
            //   e8????????           |                     
            //   50                   | push                eax
            //   8b4d2c               | mov                 ecx, dword ptr [ebp + 0x2c]
            //   e8????????           |                     
            //   8d4dd8               | lea                 ecx, [ebp - 0x28]
            //   e8????????           |                     

        $sequence_5 = { ebce 0fb645ce 85c0 740f 8b4dec c6012e 8b55ec }
            // n = 7, score = 100
            //   ebce                 | jmp                 0xffffffd0
            //   0fb645ce             | movzx               eax, byte ptr [ebp - 0x32]
            //   85c0                 | test                eax, eax
            //   740f                 | je                  0x11
            //   8b4dec               | mov                 ecx, dword ptr [ebp - 0x14]
            //   c6012e               | mov                 byte ptr [ecx], 0x2e
            //   8b55ec               | mov                 edx, dword ptr [ebp - 0x14]

        $sequence_6 = { 8b8350030000 85c0 89442414 7504 89742414 83bd180c000000 740e }
            // n = 7, score = 100
            //   8b8350030000         | mov                 eax, dword ptr [ebx + 0x350]
            //   85c0                 | test                eax, eax
            //   89442414             | mov                 dword ptr [esp + 0x14], eax
            //   7504                 | jne                 6
            //   89742414             | mov                 dword ptr [esp + 0x14], esi
            //   83bd180c000000       | cmp                 dword ptr [ebp + 0xc18], 0
            //   740e                 | je                  0x10

        $sequence_7 = { 8b5508 66894a10 8b450c 50 8b4d08 51 e8???????? }
            // n = 7, score = 100
            //   8b5508               | mov                 edx, dword ptr [ebp + 8]
            //   66894a10             | mov                 word ptr [edx + 0x10], cx
            //   8b450c               | mov                 eax, dword ptr [ebp + 0xc]
            //   50                   | push                eax
            //   8b4d08               | mov                 ecx, dword ptr [ebp + 8]
            //   51                   | push                ecx
            //   e8????????           |                     

        $sequence_8 = { 83c404 85c0 7544 68???????? 8d8d5cfdffff e8???????? 8985c8fcffff }
            // n = 7, score = 100
            //   83c404               | add                 esp, 4
            //   85c0                 | test                eax, eax
            //   7544                 | jne                 0x46
            //   68????????           |                     
            //   8d8d5cfdffff         | lea                 ecx, [ebp - 0x2a4]
            //   e8????????           |                     
            //   8985c8fcffff         | mov                 dword ptr [ebp - 0x338], eax

        $sequence_9 = { eb54 bd???????? bf???????? eb09 bd???????? 8bdd 8bfd }
            // n = 7, score = 100
            //   eb54                 | jmp                 0x56
            //   bd????????           |                     
            //   bf????????           |                     
            //   eb09                 | jmp                 0xb
            //   bd????????           |                     
            //   8bdd                 | mov                 ebx, ebp
            //   8bfd                 | mov                 edi, ebp

    condition:
        7 of them and filesize < 2859008
}