rule win_scranos_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2026-09-17"
        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 = "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 = { f7f9 6bc01c 034510 8945fc 33d2 8855fb 33c0 }
            // n = 7, score = 100
            //   f7f9                 | idiv                ecx
            //   6bc01c               | imul                eax, eax, 0x1c
            //   034510               | add                 eax, dword ptr [ebp + 0x10]
            //   8945fc               | mov                 dword ptr [ebp - 4], eax
            //   33d2                 | xor                 edx, edx
            //   8855fb               | mov                 byte ptr [ebp - 5], dl
            //   33c0                 | xor                 eax, eax

        $sequence_1 = { 8b956cffffff 52 6a25 8b45f8 50 e8???????? 83c410 }
            // n = 7, score = 100
            //   8b956cffffff         | mov                 edx, dword ptr [ebp - 0x94]
            //   52                   | push                edx
            //   6a25                 | push                0x25
            //   8b45f8               | mov                 eax, dword ptr [ebp - 8]
            //   50                   | push                eax
            //   e8????????           |                     
            //   83c410               | add                 esp, 0x10

        $sequence_2 = { ebcb 8b4df0 51 8b55fc 52 e8???????? 83c408 }
            // n = 7, score = 100
            //   ebcb                 | jmp                 0xffffffcd
            //   8b4df0               | mov                 ecx, dword ptr [ebp - 0x10]
            //   51                   | push                ecx
            //   8b55fc               | mov                 edx, dword ptr [ebp - 4]
            //   52                   | push                edx
            //   e8????????           |                     
            //   83c408               | add                 esp, 8

        $sequence_3 = { e8???????? 8bf8 8bf2 eb36 57 56 50 }
            // n = 7, score = 100
            //   e8????????           |                     
            //   8bf8                 | mov                 edi, eax
            //   8bf2                 | mov                 esi, edx
            //   eb36                 | jmp                 0x38
            //   57                   | push                edi
            //   56                   | push                esi
            //   50                   | push                eax

        $sequence_4 = { 8b55f0 8b4204 8945f0 837df000 741d 8b4df0 0fb65118 }
            // n = 7, score = 100
            //   8b55f0               | mov                 edx, dword ptr [ebp - 0x10]
            //   8b4204               | mov                 eax, dword ptr [edx + 4]
            //   8945f0               | mov                 dword ptr [ebp - 0x10], eax
            //   837df000             | cmp                 dword ptr [ebp - 0x10], 0
            //   741d                 | je                  0x1f
            //   8b4df0               | mov                 ecx, dword ptr [ebp - 0x10]
            //   0fb65118             | movzx               edx, byte ptr [ecx + 0x18]

        $sequence_5 = { 8b85ecfcffff 50 8d4d2c e8???????? c645fc14 8d8de8fdffff e8???????? }
            // n = 7, score = 100
            //   8b85ecfcffff         | mov                 eax, dword ptr [ebp - 0x314]
            //   50                   | push                eax
            //   8d4d2c               | lea                 ecx, [ebp + 0x2c]
            //   e8????????           |                     
            //   c645fc14             | mov                 byte ptr [ebp - 4], 0x14
            //   8d8de8fdffff         | lea                 ecx, [ebp - 0x218]
            //   e8????????           |                     

        $sequence_6 = { c60030 8b4dec 83c101 894dec ebd1 8b953cffffff 8b853cffffff }
            // n = 7, score = 100
            //   c60030               | mov                 byte ptr [eax], 0x30
            //   8b4dec               | mov                 ecx, dword ptr [ebp - 0x14]
            //   83c101               | add                 ecx, 1
            //   894dec               | mov                 dword ptr [ebp - 0x14], ecx
            //   ebd1                 | jmp                 0xffffffd3
            //   8b953cffffff         | mov                 edx, dword ptr [ebp - 0xc4]
            //   8b853cffffff         | mov                 eax, dword ptr [ebp - 0xc4]

        $sequence_7 = { c70300000000 0f94c2 85ed 7461 8b8ea0030000 8bbea4030000 8b442424 }
            // n = 7, score = 100
            //   c70300000000         | mov                 dword ptr [ebx], 0
            //   0f94c2               | sete                dl
            //   85ed                 | test                ebp, ebp
            //   7461                 | je                  0x63
            //   8b8ea0030000         | mov                 ecx, dword ptr [esi + 0x3a0]
            //   8bbea4030000         | mov                 edi, dword ptr [esi + 0x3a4]
            //   8b442424             | mov                 eax, dword ptr [esp + 0x24]

        $sequence_8 = { 8b55f0 8b4214 e9???????? ebb5 8b4508 8b484c 83c101 }
            // n = 7, score = 100
            //   8b55f0               | mov                 edx, dword ptr [ebp - 0x10]
            //   8b4214               | mov                 eax, dword ptr [edx + 0x14]
            //   e9????????           |                     
            //   ebb5                 | jmp                 0xffffffb7
            //   8b4508               | mov                 eax, dword ptr [ebp + 8]
            //   8b484c               | mov                 ecx, dword ptr [eax + 0x4c]
            //   83c101               | add                 ecx, 1

        $sequence_9 = { 8b0c85b8071510 40 85c9 a3???????? 740c ff1485b4071510 a1???????? }
            // n = 7, score = 100
            //   8b0c85b8071510       | mov                 ecx, dword ptr [eax*4 + 0x101507b8]
            //   40                   | inc                 eax
            //   85c9                 | test                ecx, ecx
            //   a3????????           |                     
            //   740c                 | je                  0xe
            //   ff1485b4071510       | call                dword ptr [eax*4 + 0x101507b4]
            //   a1????????           |                     

    condition:
        7 of them and filesize < 2859008
}