rule win_parallax_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2023-07-11"
        version = "1"
        description = "Detects win.parallax."
        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.parallax"
        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 = { c20400 55 8bec 8b15???????? ff7508 ff5240 5d }
            // n = 7, score = 200
            //   c20400               | ret                 4
            //   55                   | push                ebp
            //   8bec                 | mov                 ebp, esp
            //   8b15????????         |                     
            //   ff7508               | push                dword ptr [ebp + 8]
            //   ff5240               | call                dword ptr [edx + 0x40]
            //   5d                   | pop                 ebp

        $sequence_1 = { 8b7f34 8b1d???????? 895f08 03f8 c70700000000 8b7508 8b7d0c }
            // n = 7, score = 200
            //   8b7f34               | mov                 edi, dword ptr [edi + 0x34]
            //   8b1d????????         |                     
            //   895f08               | mov                 dword ptr [edi + 8], ebx
            //   03f8                 | add                 edi, eax
            //   c70700000000         | mov                 dword ptr [edi], 0
            //   8b7508               | mov                 esi, dword ptr [ebp + 8]
            //   8b7d0c               | mov                 edi, dword ptr [ebp + 0xc]

        $sequence_2 = { 8b1d???????? 331d???????? 85db 7506 b800000000 c3 8b3d???????? }
            // n = 7, score = 200
            //   8b1d????????         |                     
            //   331d????????         |                     
            //   85db                 | test                ebx, ebx
            //   7506                 | jne                 8
            //   b800000000           | mov                 eax, 0
            //   c3                   | ret                 
            //   8b3d????????         |                     

        $sequence_3 = { eb0a 6a00 ff7508 e8???????? 83f801 751c 8b15???????? }
            // n = 7, score = 200
            //   eb0a                 | jmp                 0xc
            //   6a00                 | push                0
            //   ff7508               | push                dword ptr [ebp + 8]
            //   e8????????           |                     
            //   83f801               | cmp                 eax, 1
            //   751c                 | jne                 0x1e
            //   8b15????????         |                     

        $sequence_4 = { 8b15???????? 6850020000 56 ff5250 58 eb06 }
            // n = 6, score = 200
            //   8b15????????         |                     
            //   6850020000           | push                0x250
            //   56                   | push                esi
            //   ff5250               | call                dword ptr [edx + 0x50]
            //   58                   | pop                 eax
            //   eb06                 | jmp                 8

        $sequence_5 = { ff7734 56 ff750c e8???????? c745f400000000 }
            // n = 5, score = 200
            //   ff7734               | push                dword ptr [edi + 0x34]
            //   56                   | push                esi
            //   ff750c               | push                dword ptr [ebp + 0xc]
            //   e8????????           |                     
            //   c745f400000000       | mov                 dword ptr [ebp - 0xc], 0

        $sequence_6 = { ff751c 8f4614 ff7520 8f461c 5d c21c00 }
            // n = 6, score = 200
            //   ff751c               | push                dword ptr [ebp + 0x1c]
            //   8f4614               | pop                 dword ptr [esi + 0x14]
            //   ff7520               | push                dword ptr [ebp + 0x20]
            //   8f461c               | pop                 dword ptr [esi + 0x1c]
            //   5d                   | pop                 ebp
            //   c21c00               | ret                 0x1c

        $sequence_7 = { ff7514 ff7510 ff7508 e8???????? e9???????? 3d1a800000 7515 }
            // n = 7, score = 200
            //   ff7514               | push                dword ptr [ebp + 0x14]
            //   ff7510               | push                dword ptr [ebp + 0x10]
            //   ff7508               | push                dword ptr [ebp + 8]
            //   e8????????           |                     
            //   e9????????           |                     
            //   3d1a800000           | cmp                 eax, 0x801a
            //   7515                 | jne                 0x17

        $sequence_8 = { 8975e4 8d55f0 8b0e 890a }
            // n = 4, score = 200
            //   8975e4               | mov                 dword ptr [ebp - 0x1c], esi
            //   8d55f0               | lea                 edx, [ebp - 0x10]
            //   8b0e                 | mov                 ecx, dword ptr [esi]
            //   890a                 | mov                 dword ptr [edx], ecx

        $sequence_9 = { eb03 8b7634 56 ff7508 e8???????? 8b7d08 }
            // n = 6, score = 200
            //   eb03                 | jmp                 5
            //   8b7634               | mov                 esi, dword ptr [esi + 0x34]
            //   56                   | push                esi
            //   ff7508               | push                dword ptr [ebp + 8]
            //   e8????????           |                     
            //   8b7d08               | mov                 edi, dword ptr [ebp + 8]

    condition:
        7 of them and filesize < 352256
}

rule win_parallax_w0 {
    meta:
        author = "jeFF0Falltrades"
        source = "https://github.com/jeFF0Falltrades/IoCs/blob/master/Broadbased/parallax_rat.md"
        malpedia_reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.parallax"
        malpedia_version = "20200327"
        malpedia_license = "CC BY-NC-SA 4.0"
        malpedia_sharing = "TLP:WHITE"

    strings:
        $str_ws = ".DeleteFile(Wscript.ScriptFullName)" wide ascii
        $str_cb_1 = "Clipboard Start" wide ascii
        $str_cb_2 = "Clipboard End" wide ascii
        $str_un = "UN.vbs" wide ascii
        $hex_keylogger = { 64 24 ?? C0 CA FA }

    condition:
        3 of them
}