rule win_floki_bot_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2020-08-17"
        version = "1"
        description = "autogenerated rule brought to you by yara-signator"
        tool = "yara-signator v0.4.0"
        tool_config = "callsandjumps;datarefs;binvalue"
        malpedia_reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.floki_bot"
        malpedia_rule_date = "20200817"
        malpedia_hash = "8c895fd01eccb47a6225bcb1a3ba53cbb98644c5"
        malpedia_version = "20200817"
        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 / approach 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 = { 8b4714 40 894608 8b461c 2b4608 5f 894618 }
            // n = 7, score = 1100
            //   8b4714               | mov                 eax, dword ptr [edi + 0x14]
            //   40                   | inc                 eax
            //   894608               | mov                 dword ptr [esi + 8], eax
            //   8b461c               | mov                 eax, dword ptr [esi + 0x1c]
            //   2b4608               | sub                 eax, dword ptr [esi + 8]
            //   5f                   | pop                 edi
            //   894618               | mov                 dword ptr [esi + 0x18], eax

        $sequence_1 = { 6a04 5b e8???????? 8ad8 84db 0f8403010000 f6450c08 }
            // n = 7, score = 1100
            //   6a04                 | push                4
            //   5b                   | pop                 ebx
            //   e8????????           |                     
            //   8ad8                 | mov                 bl, al
            //   84db                 | test                bl, bl
            //   0f8403010000         | je                  0x109
            //   f6450c08             | test                byte ptr [ebp + 0xc], 8

        $sequence_2 = { bfe9fd0000 2bc3 57 e8???????? 8b4d0c 46 }
            // n = 6, score = 1100
            //   bfe9fd0000           | mov                 edi, 0xfde9
            //   2bc3                 | sub                 eax, ebx
            //   57                   | push                edi
            //   e8????????           |                     
            //   8b4d0c               | mov                 ecx, dword ptr [ebp + 0xc]
            //   46                   | inc                 esi

        $sequence_3 = { 895f4c e8???????? 5e 895f48 5b c3 55 }
            // n = 7, score = 1100
            //   895f4c               | mov                 dword ptr [edi + 0x4c], ebx
            //   e8????????           |                     
            //   5e                   | pop                 esi
            //   895f48               | mov                 dword ptr [edi + 0x48], ebx
            //   5b                   | pop                 ebx
            //   c3                   | ret                 
            //   55                   | push                ebp

        $sequence_4 = { 7618 83c0fe 50 83c308 53 e8???????? 8bf0 }
            // n = 7, score = 1100
            //   7618                 | jbe                 0x1a
            //   83c0fe               | add                 eax, -2
            //   50                   | push                eax
            //   83c308               | add                 ebx, 8
            //   53                   | push                ebx
            //   e8????????           |                     
            //   8bf0                 | mov                 esi, eax

        $sequence_5 = { 0f845a010000 84c0 0f8452010000 0fb6c0 0fb6cb 6603c1 }
            // n = 6, score = 1100
            //   0f845a010000         | je                  0x160
            //   84c0                 | test                al, al
            //   0f8452010000         | je                  0x158
            //   0fb6c0               | movzx               eax, al
            //   0fb6cb               | movzx               ecx, bl
            //   6603c1               | add                 ax, cx

        $sequence_6 = { e8???????? 017308 8b7508 e8???????? 5f 5e }
            // n = 6, score = 1100
            //   e8????????           |                     
            //   017308               | add                 dword ptr [ebx + 8], esi
            //   8b7508               | mov                 esi, dword ptr [ebp + 8]
            //   e8????????           |                     
            //   5f                   | pop                 edi
            //   5e                   | pop                 esi

        $sequence_7 = { e8???????? 8b15???????? 33c0 ff05???????? a3???????? 83faff 7422 }
            // n = 7, score = 1100
            //   e8????????           |                     
            //   8b15????????         |                     
            //   33c0                 | xor                 eax, eax
            //   ff05????????         |                     
            //   a3????????           |                     
            //   83faff               | cmp                 edx, -1
            //   7422                 | je                  0x24

        $sequence_8 = { e8???????? 8b7710 e8???????? 8b771c e8???????? }
            // n = 5, score = 1100
            //   e8????????           |                     
            //   8b7710               | mov                 esi, dword ptr [edi + 0x10]
            //   e8????????           |                     
            //   8b771c               | mov                 esi, dword ptr [edi + 0x1c]
            //   e8????????           |                     

        $sequence_9 = { 8345fc04 e8???????? 8b55f0 33c9 3bc8 1bc0 f7d8 }
            // n = 7, score = 1100
            //   8345fc04             | add                 dword ptr [ebp - 4], 4
            //   e8????????           |                     
            //   8b55f0               | mov                 edx, dword ptr [ebp - 0x10]
            //   33c9                 | xor                 ecx, ecx
            //   3bc8                 | cmp                 ecx, eax
            //   1bc0                 | sbb                 eax, eax
            //   f7d8                 | neg                 eax

    condition:
        7 of them and filesize < 286720
}