rule win_fakeword_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2023-07-11"
        version = "1"
        description = "Detects win.fakeword."
        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.fakeword"
        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 = { 0f84f6010000 57 e8???????? 83c404 85c0 0f84e5010000 }
            // n = 6, score = 200
            //   0f84f6010000         | je                  0x1fc
            //   57                   | push                edi
            //   e8????????           |                     
            //   83c404               | add                 esp, 4
            //   85c0                 | test                eax, eax
            //   0f84e5010000         | je                  0x1eb

        $sequence_1 = { 89442410 894c2414 0f8675ffffff 8b2d???????? 8bfb 33f6 }
            // n = 6, score = 200
            //   89442410             | mov                 dword ptr [esp + 0x10], eax
            //   894c2414             | mov                 dword ptr [esp + 0x14], ecx
            //   0f8675ffffff         | jbe                 0xffffff7b
            //   8b2d????????         |                     
            //   8bfb                 | mov                 edi, ebx
            //   33f6                 | xor                 esi, esi

        $sequence_2 = { 83c408 85c0 7570 56 55 e8???????? }
            // n = 6, score = 200
            //   83c408               | add                 esp, 8
            //   85c0                 | test                eax, eax
            //   7570                 | jne                 0x72
            //   56                   | push                esi
            //   55                   | push                ebp
            //   e8????????           |                     

        $sequence_3 = { 83c440 c3 83fe60 0f82cc000000 83fe6f 0f87c3000000 83fe6a }
            // n = 7, score = 200
            //   83c440               | add                 esp, 0x40
            //   c3                   | ret                 
            //   83fe60               | cmp                 esi, 0x60
            //   0f82cc000000         | jb                  0xd2
            //   83fe6f               | cmp                 esi, 0x6f
            //   0f87c3000000         | ja                  0xc9
            //   83fe6a               | cmp                 esi, 0x6a

        $sequence_4 = { 56 8d4610 6a04 50 }
            // n = 4, score = 200
            //   56                   | push                esi
            //   8d4610               | lea                 eax, [esi + 0x10]
            //   6a04                 | push                4
            //   50                   | push                eax

        $sequence_5 = { ff15???????? 8b7c2414 8d7704 885f05 c60653 e9???????? 33f6 }
            // n = 7, score = 200
            //   ff15????????         |                     
            //   8b7c2414             | mov                 edi, dword ptr [esp + 0x14]
            //   8d7704               | lea                 esi, [edi + 4]
            //   885f05               | mov                 byte ptr [edi + 5], bl
            //   c60653               | mov                 byte ptr [esi], 0x53
            //   e9????????           |                     
            //   33f6                 | xor                 esi, esi

        $sequence_6 = { 8d8c2470030000 51 ff15???????? 85c0 }
            // n = 4, score = 200
            //   8d8c2470030000       | lea                 ecx, [esp + 0x370]
            //   51                   | push                ecx
            //   ff15????????         |                     
            //   85c0                 | test                eax, eax

        $sequence_7 = { 668944244c b802000000 8944246c 89442434 ff15???????? }
            // n = 5, score = 200
            //   668944244c           | mov                 word ptr [esp + 0x4c], ax
            //   b802000000           | mov                 eax, 2
            //   8944246c             | mov                 dword ptr [esp + 0x6c], eax
            //   89442434             | mov                 dword ptr [esp + 0x34], eax
            //   ff15????????         |                     

        $sequence_8 = { 89442478 0f855cffffff 8d4504 50 ff15???????? 40 }
            // n = 6, score = 200
            //   89442478             | mov                 dword ptr [esp + 0x78], eax
            //   0f855cffffff         | jne                 0xffffff62
            //   8d4504               | lea                 eax, [ebp + 4]
            //   50                   | push                eax
            //   ff15????????         |                     
            //   40                   | inc                 eax

        $sequence_9 = { 751f ff15???????? 8b35???????? 57 ffd6 55 ffd6 }
            // n = 7, score = 200
            //   751f                 | jne                 0x21
            //   ff15????????         |                     
            //   8b35????????         |                     
            //   57                   | push                edi
            //   ffd6                 | call                esi
            //   55                   | push                ebp
            //   ffd6                 | call                esi

    condition:
        7 of them and filesize < 98304
}