rule win_floki_bot_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2022-05-16"
        version = "1"
        description = "Detects win.floki_bot."
        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.floki_bot"
        malpedia_rule_date = "20220513"
        malpedia_hash = "7f4b2229e6ae614d86d74917f6d5b41890e62a26"
        malpedia_version = "20220516"
        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 = { 81ec04010000 53 56 57 8b7d08 33db 53 }
            // n = 7, score = 1100
            //   81ec04010000         | sub                 esp, 0x104
            //   53                   | push                ebx
            //   56                   | push                esi
            //   57                   | push                edi
            //   8b7d08               | mov                 edi, dword ptr [ebp + 8]
            //   33db                 | xor                 ebx, ebx
            //   53                   | push                ebx

        $sequence_1 = { 50 e8???????? 8b7d14 8d442420 50 8d5c2414 }
            // n = 6, score = 1100
            //   50                   | push                eax
            //   e8????????           |                     
            //   8b7d14               | mov                 edi, dword ptr [ebp + 0x14]
            //   8d442420             | lea                 eax, [esp + 0x20]
            //   50                   | push                eax
            //   8d5c2414             | lea                 ebx, [esp + 0x14]

        $sequence_2 = { 83c420 85c0 0f9545ff 80bf3403000000 7405 e8???????? }
            // n = 6, score = 1100
            //   83c420               | add                 esp, 0x20
            //   85c0                 | test                eax, eax
            //   0f9545ff             | setne               byte ptr [ebp - 1]
            //   80bf3403000000       | cmp                 byte ptr [edi + 0x334], 0
            //   7405                 | je                  7
            //   e8????????           |                     

        $sequence_3 = { e9???????? 8b4514 85c0 7403 832000 837f18ff 0f8503010000 }
            // n = 7, score = 1100
            //   e9????????           |                     
            //   8b4514               | mov                 eax, dword ptr [ebp + 0x14]
            //   85c0                 | test                eax, eax
            //   7403                 | je                  5
            //   832000               | and                 dword ptr [eax], 0
            //   837f18ff             | cmp                 dword ptr [edi + 0x18], -1
            //   0f8503010000         | jne                 0x109

        $sequence_4 = { 40 8a08 80f93d 75ed eb02 32db 33ff }
            // n = 7, score = 1100
            //   40                   | inc                 eax
            //   8a08                 | mov                 cl, byte ptr [eax]
            //   80f93d               | cmp                 cl, 0x3d
            //   75ed                 | jne                 0xffffffef
            //   eb02                 | jmp                 4
            //   32db                 | xor                 bl, bl
            //   33ff                 | xor                 edi, edi

        $sequence_5 = { ff15???????? 56 6a04 8d450c 50 8d45e8 }
            // n = 6, score = 1100
            //   ff15????????         |                     
            //   56                   | push                esi
            //   6a04                 | push                4
            //   8d450c               | lea                 eax, [ebp + 0xc]
            //   50                   | push                eax
            //   8d45e8               | lea                 eax, [ebp - 0x18]

        $sequence_6 = { 897df4 3bf7 0f83a0000000 8b450c 83e002 8945f0 }
            // n = 6, score = 1100
            //   897df4               | mov                 dword ptr [ebp - 0xc], edi
            //   3bf7                 | cmp                 esi, edi
            //   0f83a0000000         | jae                 0xa6
            //   8b450c               | mov                 eax, dword ptr [ebp + 0xc]
            //   83e002               | and                 eax, 2
            //   8945f0               | mov                 dword ptr [ebp - 0x10], eax

        $sequence_7 = { 50 e8???????? 83f8ff 743b 8b4dfc 8d75f0 e8???????? }
            // n = 7, score = 1100
            //   50                   | push                eax
            //   e8????????           |                     
            //   83f8ff               | cmp                 eax, -1
            //   743b                 | je                  0x3d
            //   8b4dfc               | mov                 ecx, dword ptr [ebp - 4]
            //   8d75f0               | lea                 esi, [ebp - 0x10]
            //   e8????????           |                     

        $sequence_8 = { e8???????? 84c0 7475 8365d800 33c0 40 6a10 }
            // n = 7, score = 1100
            //   e8????????           |                     
            //   84c0                 | test                al, al
            //   7475                 | je                  0x77
            //   8365d800             | and                 dword ptr [ebp - 0x28], 0
            //   33c0                 | xor                 eax, eax
            //   40                   | inc                 eax
            //   6a10                 | push                0x10

        $sequence_9 = { 895c2470 895c246c 895c2468 e8???????? 8bf0 3bf3 740b }
            // n = 7, score = 1100
            //   895c2470             | mov                 dword ptr [esp + 0x70], ebx
            //   895c246c             | mov                 dword ptr [esp + 0x6c], ebx
            //   895c2468             | mov                 dword ptr [esp + 0x68], ebx
            //   e8????????           |                     
            //   8bf0                 | mov                 esi, eax
            //   3bf3                 | cmp                 esi, ebx
            //   740b                 | je                  0xd

    condition:
        7 of them and filesize < 286720
}