rule win_isspace_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2023-07-11"
        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 = "20230705"
        malpedia_hash = "42d0574f4405bd7d2b154d321d345acb18834a41"
        malpedia_version = "20230715"
        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 = { 50 56 ff15???????? 85c0 7409 6a00 }
            // n = 6, score = 200
            //   50                   | push                eax
            //   56                   | push                esi
            //   ff15????????         |                     
            //   85c0                 | test                eax, eax
            //   7409                 | je                  0xb
            //   6a00                 | push                0

        $sequence_1 = { c701???????? a1???????? 85c0 7409 50 }
            // n = 5, score = 200
            //   c701????????         |                     
            //   a1????????           |                     
            //   85c0                 | test                eax, eax
            //   7409                 | je                  0xb
            //   50                   | push                eax

        $sequence_2 = { 6870170000 ff15???????? e9???????? 6a40 6a00 }
            // n = 5, score = 200
            //   6870170000           | push                0x1770
            //   ff15????????         |                     
            //   e9????????           |                     
            //   6a40                 | push                0x40
            //   6a00                 | push                0

        $sequence_3 = { e8???????? 85c0 7409 83f86f }
            // n = 4, score = 200
            //   e8????????           |                     
            //   85c0                 | test                eax, eax
            //   7409                 | je                  0xb
            //   83f86f               | cmp                 eax, 0x6f

        $sequence_4 = { eb0a 6a00 6a23 eb04 6a00 6a2b 68???????? }
            // n = 7, score = 200
            //   eb0a                 | jmp                 0xc
            //   6a00                 | push                0
            //   6a23                 | push                0x23
            //   eb04                 | jmp                 6
            //   6a00                 | push                0
            //   6a2b                 | push                0x2b
            //   68????????           |                     

        $sequence_5 = { c78548ffffff9c000000 e8???????? 8ad8 c745fc00000000 8d8548ffffff }
            // n = 5, score = 200
            //   c78548ffffff9c000000     | mov    dword ptr [ebp - 0xb8], 0x9c
            //   e8????????           |                     
            //   8ad8                 | mov                 bl, al
            //   c745fc00000000       | mov                 dword ptr [ebp - 4], 0
            //   8d8548ffffff         | lea                 eax, [ebp - 0xb8]

        $sequence_6 = { ff15???????? 50 eb05 68???????? 68???????? ff15???????? }
            // n = 6, score = 200
            //   ff15????????         |                     
            //   50                   | push                eax
            //   eb05                 | jmp                 7
            //   68????????           |                     
            //   68????????           |                     
            //   ff15????????         |                     

        $sequence_7 = { 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

    condition:
        7 of them and filesize < 434176
}