rule win_isspace_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2021-06-10"
        version = "1"
        description = "Detects win.isspace."
        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.isspace"
        malpedia_rule_date = "20210604"
        malpedia_hash = "be09d5d71e77373c0f538068be31a2ad4c69cfbd"
        malpedia_version = "20210616"
        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 = { 48 c1e802 40 8d0cc500000000 }
            // n = 4, score = 200
            //   48                   | dec                 eax
            //   c1e802               | shr                 eax, 2
            //   40                   | inc                 eax
            //   8d0cc500000000       | lea                 ecx, dword ptr [eax*8]

        $sequence_1 = { 85c0 751d 8bc6 46 83f805 7c09 }
            // n = 6, score = 200
            //   85c0                 | test                eax, eax
            //   751d                 | jne                 0x1f
            //   8bc6                 | mov                 eax, esi
            //   46                   | inc                 esi
            //   83f805               | cmp                 eax, 5
            //   7c09                 | jl                  0xb

        $sequence_2 = { 68???????? 68???????? 64a100000000 50 83ec08 b898a30000 }
            // n = 6, score = 200
            //   68????????           |                     
            //   68????????           |                     
            //   64a100000000         | mov                 eax, dword ptr fs:[0]
            //   50                   | push                eax
            //   83ec08               | sub                 esp, 8
            //   b898a30000           | mov                 eax, 0xa398

        $sequence_3 = { e8???????? 85c0 750e 6810270000 ffd6 83ff03 }
            // n = 6, score = 200
            //   e8????????           |                     
            //   85c0                 | test                eax, eax
            //   750e                 | jne                 0x10
            //   6810270000           | push                0x2710
            //   ffd6                 | call                esi
            //   83ff03               | cmp                 edi, 3

        $sequence_4 = { 64a300000000 8965e8 c745fc00000000 ff15???????? 3d04080000 }
            // n = 5, score = 200
            //   64a300000000         | mov                 dword ptr fs:[0], eax
            //   8965e8               | mov                 dword ptr [ebp - 0x18], esp
            //   c745fc00000000       | mov                 dword ptr [ebp - 4], 0
            //   ff15????????         |                     
            //   3d04080000           | cmp                 eax, 0x804

        $sequence_5 = { eb0a 6a00 6a23 eb04 6a00 6a2b }
            // n = 6, score = 200
            //   eb0a                 | jmp                 0xc
            //   6a00                 | push                0
            //   6a23                 | push                0x23
            //   eb04                 | jmp                 6
            //   6a00                 | push                0
            //   6a2b                 | push                0x2b

        $sequence_6 = { c745fc00000000 8d8548ffffff 50 ff15???????? }
            // n = 4, score = 200
            //   c745fc00000000       | mov                 dword ptr [ebp - 4], 0
            //   8d8548ffffff         | lea                 eax, dword ptr [ebp - 0xb8]
            //   50                   | push                eax
            //   ff15????????         |                     

        $sequence_7 = { 83c404 6683f809 740c 6683f806 7406 32c0 }
            // n = 6, score = 200
            //   83c404               | add                 esp, 4
            //   6683f809             | cmp                 ax, 9
            //   740c                 | je                  0xe
            //   6683f806             | cmp                 ax, 6
            //   7406                 | je                  8
            //   32c0                 | xor                 al, al

    condition:
        7 of them and filesize < 434176
}