rule win_turnedup_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2026-09-17"
        version = "1"
        description = "Detects win.turnedup."
        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.turnedup"
        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 = { 56 8b30 57 894db4 6a00 }
            // n = 5, score = 400
            //   56                   | push                esi
            //   8b30                 | mov                 esi, dword ptr [eax]
            //   57                   | push                edi
            //   894db4               | mov                 dword ptr [ebp - 0x4c], ecx
            //   6a00                 | push                0

        $sequence_1 = { c6460401 e8???????? 84c0 0f8468ffffff eb06 807dc300 }
            // n = 6, score = 400
            //   c6460401             | mov                 byte ptr [esi + 4], 1
            //   e8????????           |                     
            //   84c0                 | test                al, al
            //   0f8468ffffff         | je                  0xffffff6e
            //   eb06                 | jmp                 8
            //   807dc300             | cmp                 byte ptr [ebp - 0x3d], 0

        $sequence_2 = { 830802 eb08 8b45a4 0f95c2 8810 8b4d0c }
            // n = 6, score = 400
            //   830802               | or                  dword ptr [eax], 2
            //   eb08                 | jmp                 0xa
            //   8b45a4               | mov                 eax, dword ptr [ebp - 0x5c]
            //   0f95c2               | setne               dl
            //   8810                 | mov                 byte ptr [eax], dl
            //   8b4d0c               | mov                 ecx, dword ptr [ebp + 0xc]

        $sequence_3 = { fc f2ae f7d1 49 3e894c241c }
            // n = 5, score = 400
            //   fc                   | cld                 
            //   f2ae                 | repne scasb         al, byte ptr es:[edi]
            //   f7d1                 | not                 ecx
            //   49                   | dec                 ecx
            //   3e894c241c           | mov                 dword ptr ds:[esp + 0x1c], ecx

        $sequence_4 = { c745ec4d4e4f50 c745f051525354 c745f455565758 66c745f8595a 85ff 7e1a e8???????? }
            // n = 7, score = 400
            //   c745ec4d4e4f50       | mov                 dword ptr [ebp - 0x14], 0x504f4e4d
            //   c745f051525354       | mov                 dword ptr [ebp - 0x10], 0x54535251
            //   c745f455565758       | mov                 dword ptr [ebp - 0xc], 0x58575655
            //   66c745f8595a         | mov                 word ptr [ebp - 8], 0x5a59
            //   85ff                 | test                edi, edi
            //   7e1a                 | jle                 0x1c
            //   e8????????           |                     

        $sequence_5 = { 7434 8b4120 833800 741b 8b5130 833a00 7e13 }
            // n = 7, score = 400
            //   7434                 | je                  0x36
            //   8b4120               | mov                 eax, dword ptr [ecx + 0x20]
            //   833800               | cmp                 dword ptr [eax], 0
            //   741b                 | je                  0x1d
            //   8b5130               | mov                 edx, dword ptr [ecx + 0x30]
            //   833a00               | cmp                 dword ptr [edx], 0
            //   7e13                 | jle                 0x15

        $sequence_6 = { 7ec9 46 ebc6 c645ba01 83ff10 }
            // n = 5, score = 400
            //   7ec9                 | jle                 0xffffffcb
            //   46                   | inc                 esi
            //   ebc6                 | jmp                 0xffffffc8
            //   c645ba01             | mov                 byte ptr [ebp - 0x46], 1
            //   83ff10               | cmp                 edi, 0x10

        $sequence_7 = { 5f 3bcb 7418 8b4508 6aff }
            // n = 5, score = 400
            //   5f                   | pop                 edi
            //   3bcb                 | cmp                 ecx, ebx
            //   7418                 | je                  0x1a
            //   8b4508               | mov                 eax, dword ptr [ebp + 8]
            //   6aff                 | push                -1

        $sequence_8 = { 7557 e8???????? 8b08 8b45bc 8a11 8810 }
            // n = 6, score = 400
            //   7557                 | jne                 0x59
            //   e8????????           |                     
            //   8b08                 | mov                 ecx, dword ptr [eax]
            //   8b45bc               | mov                 eax, dword ptr [ebp - 0x44]
            //   8a11                 | mov                 dl, byte ptr [ecx]
            //   8810                 | mov                 byte ptr [eax], dl

        $sequence_9 = { ff15???????? 33c0 c3 8bc1 }
            // n = 4, score = 400
            //   ff15????????         |                     
            //   33c0                 | xor                 eax, eax
            //   c3                   | ret                 
            //   8bc1                 | mov                 eax, ecx

    condition:
        7 of them and filesize < 892928
}