rule win_betabot_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2020-12-22"
        version = "1"
        description = "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.betabot"
        malpedia_rule_date = "20201222"
        malpedia_hash = "30354d830a29f0fbd3714d93d94dea941d77a130"
        malpedia_version = "20201023"
        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 = { e8???????? 85c0 7504 33c0 eb45 8365fc00 }
            // n = 6, score = 400
            //   e8????????           |                     
            //   85c0                 | test                eax, eax
            //   7504                 | jne                 6
            //   33c0                 | xor                 eax, eax
            //   eb45                 | jmp                 0x47
            //   8365fc00             | and                 dword ptr [ebp - 4], 0

        $sequence_1 = { c9 c20800 55 8bec 33c0 394508 7419 }
            // n = 7, score = 400
            //   c9                   | leave               
            //   c20800               | ret                 8
            //   55                   | push                ebp
            //   8bec                 | mov                 ebp, esp
            //   33c0                 | xor                 eax, eax
            //   394508               | cmp                 dword ptr [ebp + 8], eax
            //   7419                 | je                  0x1b

        $sequence_2 = { 8b461c 8945f8 58 5e 56 50 8b7508 }
            // n = 7, score = 400
            //   8b461c               | mov                 eax, dword ptr [esi + 0x1c]
            //   8945f8               | mov                 dword ptr [ebp - 8], eax
            //   58                   | pop                 eax
            //   5e                   | pop                 esi
            //   56                   | push                esi
            //   50                   | push                eax
            //   8b7508               | mov                 esi, dword ptr [ebp + 8]

        $sequence_3 = { 8d45e8 50 e8???????? 6a41 58 668945e4 }
            // n = 6, score = 400
            //   8d45e8               | lea                 eax, [ebp - 0x18]
            //   50                   | push                eax
            //   e8????????           |                     
            //   6a41                 | push                0x41
            //   58                   | pop                 eax
            //   668945e4             | mov                 word ptr [ebp - 0x1c], ax

        $sequence_4 = { ff15???????? 85c0 781d 6a10 58 8bc8 66890e }
            // n = 7, score = 400
            //   ff15????????         |                     
            //   85c0                 | test                eax, eax
            //   781d                 | js                  0x1f
            //   6a10                 | push                0x10
            //   58                   | pop                 eax
            //   8bc8                 | mov                 ecx, eax
            //   66890e               | mov                 word ptr [esi], cx

        $sequence_5 = { 83ec14 53 56 837d0800 }
            // n = 4, score = 400
            //   83ec14               | sub                 esp, 0x14
            //   53                   | push                ebx
            //   56                   | push                esi
            //   837d0800             | cmp                 dword ptr [ebp + 8], 0

        $sequence_6 = { 7423 51 6a08 5f e8???????? 03f0 }
            // n = 6, score = 400
            //   7423                 | je                  0x25
            //   51                   | push                ecx
            //   6a08                 | push                8
            //   5f                   | pop                 edi
            //   e8????????           |                     
            //   03f0                 | add                 esi, eax

        $sequence_7 = { 6a00 8d45c8 50 e8???????? ff75ea ff15???????? }
            // n = 6, score = 400
            //   6a00                 | push                0
            //   8d45c8               | lea                 eax, [ebp - 0x38]
            //   50                   | push                eax
            //   e8????????           |                     
            //   ff75ea               | push                dword ptr [ebp - 0x16]
            //   ff15????????         |                     

        $sequence_8 = { 8975ec 8945f0 8975f4 e8???????? 68d2040000 ff35???????? 8bd8 }
            // n = 7, score = 400
            //   8975ec               | mov                 dword ptr [ebp - 0x14], esi
            //   8945f0               | mov                 dword ptr [ebp - 0x10], eax
            //   8975f4               | mov                 dword ptr [ebp - 0xc], esi
            //   e8????????           |                     
            //   68d2040000           | push                0x4d2
            //   ff35????????         |                     
            //   8bd8                 | mov                 ebx, eax

        $sequence_9 = { 5e c9 c20800 55 8bec 33c0 56 }
            // n = 7, score = 400
            //   5e                   | pop                 esi
            //   c9                   | leave               
            //   c20800               | ret                 8
            //   55                   | push                ebp
            //   8bec                 | mov                 ebp, esp
            //   33c0                 | xor                 eax, eax
            //   56                   | push                esi

    condition:
        7 of them and filesize < 835584
}

rule win_betabot_w0 {
    meta:
        author = "Venom23"
        date = "2013-06-21"
        description = "Neurevt Malware Sig"
        hash = "db9a816d58899f1ba92bc338e89f856a"
        hash = "d7b427ce3175fa7704da6b19a464938e"
        hash = "13027beb8aa5e891e8e641c05ccffde3"
        hash = "d1004b63d6d3cb90e6012c68e19ab453"
        hash = "a1286fd94984fd2de857f7b846062b5e"
        yaragenerator = "https://github.com/Xen0ph0n/YaraGenerator"
        source = "https://github.com/mattulm/sfiles_yara/blob/master/malware/Neurevt.yar"
        malpedia_reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.betabot"
        malpedia_version = "20170517"
        malpedia_license = "CC BY-NC-SA 4.0"
        malpedia_sharing = "TLP:WHITE"

    strings:
        $string0 = "BullGuard" wide
        $string1 = "cmd.exe" wide
        $string4 = "eUSERPROFILE" wide
        $string5 = "%c:\\%s.lnk" wide
        $string6 = "services.exe" wide
        $string9 = "Multiples archivos corruptos han sido encontrados en la carpeta \"Mis Documentos\". Para evitar perder" wide
        $string10 = "F-PROT Antivirus Tray application" wide
        $string12 = "-k NetworkService" wide
        $string13 = "firefox.exe"
        $string14 = "uWinMgr.exe" wide
        $string15 = "Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.7.13) Gecko/20060410 Firefox/1.0.8"
        $string16 = "Mozilla/5.0 (Windows; U; Windows NT 6.0; en-GB; rv:1.8.1.11) Gecko/20071127 Firefox/2.0.0.11"
        $string18 = "Data Path" wide

    condition:
        10 of them
}