rule win_slip_screen_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2026-09-17"
        version = "1"
        description = "Detects win.slip_screen."
        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.slip_screen"
        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 = { 8bd6 488bcb e8???????? 488987c8000000 4885c0 0f8426010000 41b81301fe29 }
            // n = 7, score = 100
            //   8bd6                 | inc                 ecx
            //   488bcb               | mov                 eax, 0xc94622e2
            //   e8????????           |                     
            //   488987c8000000       | mov                 edx, esi
            //   4885c0               | movzx               eax, word ptr [eax + 0x18]
            //   0f8426010000         | mov                 word ptr [ebp - 0x21], ax
            //   41b81301fe29         | call                ebx

        $sequence_1 = { 0f46c3 4883c128 8bd8 4983e801 }
            // n = 4, score = 100
            //   0f46c3               | add                 edx, esi
            //   4883c128             | je                  0x137
            //   8bd8                 | nop                 dword ptr [eax + eax]
            //   4983e801             | inc                 ebp

        $sequence_2 = { 490fafd3 4c8bc2 4d0fafc3 4a8d040a 4803c1 4d8bc8 488bc8 }
            // n = 7, score = 100
            //   490fafd3             | dec                 ecx
            //   4c8bc2               | lea                 eax, [ecx + edx]
            //   4d0fafc3             | dec                 ecx
            //   4a8d040a             | mov                 edx, ecx
            //   4803c1               | dec                 eax
            //   4d8bc8               | add                 eax, ecx
            //   488bc8               | dec                 eax

        $sequence_3 = { 6633443bf8 668947f8 4b8d0413 4803c2 }
            // n = 4, score = 100
            //   6633443bf8           | dec                 eax
            //   668947f8             | lea                 ecx, [0xffff8225]
            //   4b8d0413             | dec                 eax
            //   4803c2               | lea                 edx, [0x9647]

        $sequence_4 = { 488d5587 488d4d17 0f2945a7 c74587a36833af c7458b00e77d1e c7458f228cea6a c74593ebf03875 }
            // n = 7, score = 100
            //   488d5587             | dec                 eax
            //   488d4d17             | lea                 edi, [0xfffff784]
            //   0f2945a7             | jmp                 0x1c94
            //   c74587a36833af       | dec                 eax
            //   c7458b00e77d1e       | mov                 eax, dword ptr [ebx]
            //   c7458f228cea6a       | push                edi
            //   c74593ebf03875       | dec                 eax

        $sequence_5 = { 4c8d45f0 4c896c2438 33d2 4c896c2430 4c896c2428 }
            // n = 5, score = 100
            //   4c8d45f0             | add                 eax, ecx
            //   4c896c2438           | dec                 ecx
            //   33d2                 | add                 eax, edx
            //   4c896c2430           | dec                 eax
            //   4c896c2428           | mov                 ecx, eax

        $sequence_6 = { 0f85c1000000 eb6b 4d8bbcf7881e0000 33d2 498bcf }
            // n = 5, score = 100
            //   0f85c1000000         | mov                 ebx, dword ptr [ebp + edi*8 + 0x1a620]
            //   eb6b                 | nop                 
            //   4d8bbcf7881e0000     | dec                 esp
            //   33d2                 | lea                 esi, [0x8537]
            //   498bcf               | dec                 ecx

        $sequence_7 = { 410fb75102 4983c102 4983c202 6685d2 75c1 eb06 66413939 }
            // n = 7, score = 100
            //   410fb75102           | lea                 ecx, [0xfffedae7]
            //   4983c102             | and                 eax, 0x3f
            //   4983c202             | dec                 esp
            //   6685d2               | lea                 edi, [eax + eax*8]
            //   75c1                 | dec                 edx
            //   eb06                 | mov                 eax, dword ptr [ecx + ebp*8 + 0x1a210]
            //   66413939             | dec                 edx

        $sequence_8 = { 488b87b0000000 41b8bb010000 4533c9 488bd5 498bce }
            // n = 5, score = 100
            //   488b87b0000000       | mov                 dword ptr [esp + 0x30], 0xaf3d68a0
            //   41b8bb010000         | mov                 dword ptr [esp + 0x34], 0x1e79e701
            //   4533c9               | mov                 dword ptr [esp + 0x38], 0x6af98c11
            //   488bd5               | mov                 dword ptr [esp + 0x3c], 0x7558f0d1
            //   498bce               | mov                 dword ptr [esp + 0x30], 0xaf0268bf

        $sequence_9 = { 8bc2 f7d8 8d6aff 036f50 488d4aff 4823e8 }
            // n = 6, score = 100
            //   8bc2                 | dec                 esp
            //   f7d8                 | mov                 edx, dword ptr [edi + 0xc0]
            //   8d6aff               | inc                 ebp
            //   036f50               | xor                 ecx, ecx
            //   488d4aff             | inc                 edx
            //   4823e8               | movzx               ecx, byte ptr [eax + edi*8 + 0x3e]

    condition:
        7 of them and filesize < 282624
}