rule win_joanap_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2020-10-14"
        version = "1"
        description = "autogenerated rule brought to you by yara-signator"
        tool = "yara-signator v0.5.0"
        tool_config = "callsandjumps;datarefs;binvalue"
        malpedia_reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.joanap"
        malpedia_rule_date = "20201014"
        malpedia_hash = "a7e3bd57eaf12bf3ea29a863c041091ba3af9ac9"
        malpedia_version = "20201014"
        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 = { 68???????? 68???????? c705????????20000000 c705????????02000000 c705????????01000000 8935???????? 8935???????? }
            // n = 7, score = 100
            //   68????????           |                     
            //   68????????           |                     
            //   c705????????20000000     |     
            //   c705????????02000000     |     
            //   c705????????01000000     |     
            //   8935????????         |                     
            //   8935????????         |                     

        $sequence_1 = { 85f6 7469 8b842494000000 6a00 6a00 56 }
            // n = 6, score = 100
            //   85f6                 | test                esi, esi
            //   7469                 | je                  0x6b
            //   8b842494000000       | mov                 eax, dword ptr [esp + 0x94]
            //   6a00                 | push                0
            //   6a00                 | push                0
            //   56                   | push                esi

        $sequence_2 = { 740f 56 ffd3 8b4c2410 51 }
            // n = 5, score = 100
            //   740f                 | je                  0x11
            //   56                   | push                esi
            //   ffd3                 | call                ebx
            //   8b4c2410             | mov                 ecx, dword ptr [esp + 0x10]
            //   51                   | push                ecx

        $sequence_3 = { 49 8dbe7c040000 8bd9 83c9ff f2ae f7d1 49 }
            // n = 7, score = 100
            //   49                   | dec                 ecx
            //   8dbe7c040000         | lea                 edi, [esi + 0x47c]
            //   8bd9                 | mov                 ebx, ecx
            //   83c9ff               | or                  ecx, 0xffffffff
            //   f2ae                 | repne scasb         al, byte ptr es:[edi]
            //   f7d1                 | not                 ecx
            //   49                   | dec                 ecx

        $sequence_4 = { 56 e8???????? 83c404 33ff a1???????? 8b0c07 85c9 }
            // n = 7, score = 100
            //   56                   | push                esi
            //   e8????????           |                     
            //   83c404               | add                 esp, 4
            //   33ff                 | xor                 edi, edi
            //   a1????????           |                     
            //   8b0c07               | mov                 ecx, dword ptr [edi + eax]
            //   85c9                 | test                ecx, ecx

        $sequence_5 = { 53 c70316000000 52 66897b04 e8???????? 83c410 }
            // n = 6, score = 100
            //   53                   | push                ebx
            //   c70316000000         | mov                 dword ptr [ebx], 0x16
            //   52                   | push                edx
            //   66897b04             | mov                 word ptr [ebx + 4], di
            //   e8????????           |                     
            //   83c410               | add                 esp, 0x10

        $sequence_6 = { c3 83e010 3c10 750d 6a01 }
            // n = 5, score = 100
            //   c3                   | ret                 
            //   83e010               | and                 eax, 0x10
            //   3c10                 | cmp                 al, 0x10
            //   750d                 | jne                 0xf
            //   6a01                 | push                1

        $sequence_7 = { 66c744241cffff c744241802000000 e8???????? 56 ff15???????? 83c414 }
            // n = 6, score = 100
            //   66c744241cffff       | mov                 word ptr [esp + 0x1c], 0xffff
            //   c744241802000000     | mov                 dword ptr [esp + 0x18], 2
            //   e8????????           |                     
            //   56                   | push                esi
            //   ff15????????         |                     
            //   83c414               | add                 esp, 0x14

        $sequence_8 = { 55 50 ff15???????? 68???????? 56 ffd3 }
            // n = 6, score = 100
            //   55                   | push                ebp
            //   50                   | push                eax
            //   ff15????????         |                     
            //   68????????           |                     
            //   56                   | push                esi
            //   ffd3                 | call                ebx

        $sequence_9 = { 8b13 25ffff0000 89542426 8b5304 8954242a 8b5308 }
            // n = 6, score = 100
            //   8b13                 | mov                 edx, dword ptr [ebx]
            //   25ffff0000           | and                 eax, 0xffff
            //   89542426             | mov                 dword ptr [esp + 0x26], edx
            //   8b5304               | mov                 edx, dword ptr [ebx + 4]
            //   8954242a             | mov                 dword ptr [esp + 0x2a], edx
            //   8b5308               | mov                 edx, dword ptr [ebx + 8]

    condition:
        7 of them and filesize < 270336
}