rule win_sykipot_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2026-05-04"
        version = "1"
        description = "Detects win.sykipot."
        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.sykipot"
        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 = { 8944240c 85c0 750f 5f 5e b8???????? 5b }
            // n = 7, score = 200
            //   8944240c             | mov                 dword ptr [esp + 0xc], eax
            //   85c0                 | test                eax, eax
            //   750f                 | jne                 0x11
            //   5f                   | pop                 edi
            //   5e                   | pop                 esi
            //   b8????????           |                     
            //   5b                   | pop                 ebx

        $sequence_1 = { 894c2430 8d8c2468070000 8954243c 894c2450 8d942468040000 8d4c242c 8d842468060000 }
            // n = 7, score = 200
            //   894c2430             | mov                 dword ptr [esp + 0x30], ecx
            //   8d8c2468070000       | lea                 ecx, [esp + 0x768]
            //   8954243c             | mov                 dword ptr [esp + 0x3c], edx
            //   894c2450             | mov                 dword ptr [esp + 0x50], ecx
            //   8d942468040000       | lea                 edx, [esp + 0x468]
            //   8d4c242c             | lea                 ecx, [esp + 0x2c]
            //   8d842468060000       | lea                 eax, [esp + 0x668]

        $sequence_2 = { c744242404000000 ffd7 8b4c2450 6a04 80c980 }
            // n = 5, score = 200
            //   c744242404000000     | mov                 dword ptr [esp + 0x24], 4
            //   ffd7                 | call                edi
            //   8b4c2450             | mov                 ecx, dword ptr [esp + 0x50]
            //   6a04                 | push                4
            //   80c980               | or                  cl, 0x80

        $sequence_3 = { c784249000000040000000 8bfc f3a5 6a02 8bca e8???????? 5f }
            // n = 7, score = 200
            //   c784249000000040000000     | mov    dword ptr [esp + 0x90], 0x40
            //   8bfc                 | mov                 edi, esp
            //   f3a5                 | rep movsd           dword ptr es:[edi], dword ptr [esi]
            //   6a02                 | push                2
            //   8bca                 | mov                 ecx, edx
            //   e8????????           |                     
            //   5f                   | pop                 edi

        $sequence_4 = { 5f 5e 5d b80d000000 5b 81c45c180000 c3 }
            // n = 7, score = 200
            //   5f                   | pop                 edi
            //   5e                   | pop                 esi
            //   5d                   | pop                 ebp
            //   b80d000000           | mov                 eax, 0xd
            //   5b                   | pop                 ebx
            //   81c45c180000         | add                 esp, 0x185c
            //   c3                   | ret                 

        $sequence_5 = { c685c0fa011000 45 be???????? b8???????? }
            // n = 4, score = 200
            //   c685c0fa011000       | mov                 byte ptr [ebp + 0x1001fac0], 0
            //   45                   | inc                 ebp
            //   be????????           |                     
            //   b8????????           |                     

        $sequence_6 = { 7423 8d942490020000 52 68???????? 50 ff15???????? }
            // n = 6, score = 200
            //   7423                 | je                  0x25
            //   8d942490020000       | lea                 edx, [esp + 0x290]
            //   52                   | push                edx
            //   68????????           |                     
            //   50                   | push                eax
            //   ff15????????         |                     

        $sequence_7 = { 81ec0c020000 85c0 53 55 56 }
            // n = 5, score = 200
            //   81ec0c020000         | sub                 esp, 0x20c
            //   85c0                 | test                eax, eax
            //   53                   | push                ebx
            //   55                   | push                ebp
            //   56                   | push                esi

        $sequence_8 = { 83cafe 42 0f95c2 88140e 99 2bc2 d1f8 }
            // n = 7, score = 200
            //   83cafe               | or                  edx, 0xfffffffe
            //   42                   | inc                 edx
            //   0f95c2               | setne               dl
            //   88140e               | mov                 byte ptr [esi + ecx], dl
            //   99                   | cdq                 
            //   2bc2                 | sub                 eax, edx
            //   d1f8                 | sar                 eax, 1

        $sequence_9 = { 50 ff15???????? 83c42c 8b4c2410 8d942418030000 51 }
            // n = 6, score = 200
            //   50                   | push                eax
            //   ff15????????         |                     
            //   83c42c               | add                 esp, 0x2c
            //   8b4c2410             | mov                 ecx, dword ptr [esp + 0x10]
            //   8d942418030000       | lea                 edx, [esp + 0x318]
            //   51                   | push                ecx

    condition:
        7 of them and filesize < 286720
}