What is vaarclient.dll?

vaarclient.dll is part of Avast Antivirus and developed by AVAST Software according to the vaarclient.dll version information.

vaarclient.dll's description is "Avast vaarclient library"

vaarclient.dll is digitally signed by AVAST Software s.r.o..

vaarclient.dll is usually located in the 'c:\Program Files\AVAST Software\Avast\' folder.

None of the anti-virus scanners at VirusTotal reports anything malicious about vaarclient.dll.

If you have additional information about the file, please share it with the FreeFixer users by posting a comment at the bottom of this page.

Vendor and version information [?]

The following is the available information on vaarclient.dll:

PropertyValue
Product nameAvast Antivirus
Company nameAVAST Software
File descriptionAvast vaarclient library
Internal namevaarclient
Original filenamevaarclient.dll
Legal copyrightCopyright (c) 2019 AVAST Software
Product version19.6.4546.0
File version19.6.4546.0

Here's a screenshot of the file properties when displayed by Windows Explorer:

Product nameAvast Antivirus
Company nameAVAST Software
File descriptionAvast vaarclient library
Internal namevaarclient
Original filenamevaarclient.dll
Legal copyrightCopyright (c) 2019 AVAST Software
Product version19.6.4546.0
File version19.6.4546.0

Digital signatures [?]

vaarclient.dll has a valid digital signature.

PropertyValue
Signer nameAVAST Software s.r.o.
Certificate issuer nameDigiCert SHA2 Assured ID Code Signing CA
Certificate serial number01e93999f3871d1091dc1e8d58b8d405

VirusTotal report

None of the 60 anti-virus programs at VirusTotal detected the vaarclient.dll file.

None of the 60 anti-virus programs detected the vaarclient.dll file.

Sandbox Report

The following information was gathered by executing the file inside Cuckoo Sandbox.

Summary

Successfully executed process in sandbox.

Summary

{
    "dll_loaded": [
        "C:\\Users\\cuck\\AppData\\Local\\Temp\\e3a83f85d3245ef159c17fc9b170d2c8ff43528b2fdc65e4ebf9d686b07b63fc.bin.dll"
    ],
    "file_opened": [
        "C:\\Windows\\System32\\en-US\\KERNELBASE.dll.mui",
        "C:\\Users\\cuck\\AppData\\Local\\Temp\\e3a83f85d3245ef159c17fc9b170d2c8ff43528b2fdc65e4ebf9d686b07b63fc.bin.dll"
    ],
    "command_line": [
        "\"C:\\Windows\\System32\\rundll32.exe\" C:\\Users\\cuck\\AppData\\Local\\Temp\\e3a83f85d3245ef159c17fc9b170d2c8ff43528b2fdc65e4ebf9d686b07b63fc.bin.dll,DllMain"
    ],
    "file_exists": [
        "C:\\Users\\cuck\\AppData\\Local\\Temp\\e3a83f85d3245ef159c17fc9b170d2c8ff43528b2fdc65e4ebf9d686b07b63fc.bin.dll",
        "C:\\Users\\cuck\\AppData\\Local\\Temp\\e3a83f85d3245ef159c17fc9b170d2c8ff43528b2fdc65e4ebf9d686b07b63fc.bin.dll.manifest"
    ],
    "file_read": [
        "C:\\Users\\cuck\\AppData\\Local\\Temp\\e3a83f85d3245ef159c17fc9b170d2c8ff43528b2fdc65e4ebf9d686b07b63fc.bin.dll"
    ],
    "regkey_read": [
        "HKEY_LOCAL_MACHINE\\SOFTWARE\\Microsoft\\Windows\\Windows Error Reporting\\WMR\\Disable",
        "HKEY_LOCAL_MACHINE\\SOFTWARE\\Microsoft\\Windows NT\\CurrentVersion\\GRE_Initialize\\DisableMetaFiles"
    ]
}

Generic

[
    {
        "process_path": "C:\\Windows\\SysWOW64\\rundll32.exe",
        "process_name": "rundll32.exe",
        "pid": 2436,
        "summary": {
            "dll_loaded": [
                "C:\\Users\\cuck\\AppData\\Local\\Temp\\e3a83f85d3245ef159c17fc9b170d2c8ff43528b2fdc65e4ebf9d686b07b63fc.bin.dll"
            ],
            "file_opened": [
                "C:\\Users\\cuck\\AppData\\Local\\Temp\\e3a83f85d3245ef159c17fc9b170d2c8ff43528b2fdc65e4ebf9d686b07b63fc.bin.dll"
            ],
            "command_line": [
                "\"C:\\Windows\\System32\\rundll32.exe\" C:\\Users\\cuck\\AppData\\Local\\Temp\\e3a83f85d3245ef159c17fc9b170d2c8ff43528b2fdc65e4ebf9d686b07b63fc.bin.dll,DllMain"
            ],
            "file_exists": [
                "C:\\Users\\cuck\\AppData\\Local\\Temp\\e3a83f85d3245ef159c17fc9b170d2c8ff43528b2fdc65e4ebf9d686b07b63fc.bin.dll",
                "C:\\Users\\cuck\\AppData\\Local\\Temp\\e3a83f85d3245ef159c17fc9b170d2c8ff43528b2fdc65e4ebf9d686b07b63fc.bin.dll.manifest"
            ],
            "file_read": [
                "C:\\Users\\cuck\\AppData\\Local\\Temp\\e3a83f85d3245ef159c17fc9b170d2c8ff43528b2fdc65e4ebf9d686b07b63fc.bin.dll"
            ],
            "regkey_read": [
                "HKEY_LOCAL_MACHINE\\SOFTWARE\\Microsoft\\Windows NT\\CurrentVersion\\GRE_Initialize\\DisableMetaFiles"
            ]
        },
        "first_seen": 1565326385.8438,
        "ppid": 2660
    },
    {
        "process_path": "C:\\Windows\\System32\\rundll32.exe",
        "process_name": "rundll32.exe",
        "pid": 2588,
        "summary": {
            "file_opened": [
                "C:\\Windows\\System32\\en-US\\KERNELBASE.dll.mui"
            ],
            "file_exists": [
                "C:\\Users\\cuck\\AppData\\Local\\Temp\\e3a83f85d3245ef159c17fc9b170d2c8ff43528b2fdc65e4ebf9d686b07b63fc.bin.dll",
                "C:\\Users\\cuck\\AppData\\Local\\Temp\\e3a83f85d3245ef159c17fc9b170d2c8ff43528b2fdc65e4ebf9d686b07b63fc.bin.dll.manifest"
            ],
            "regkey_read": [
                "HKEY_LOCAL_MACHINE\\SOFTWARE\\Microsoft\\Windows\\Windows Error Reporting\\WMR\\Disable",
                "HKEY_LOCAL_MACHINE\\SOFTWARE\\Microsoft\\Windows NT\\CurrentVersion\\GRE_Initialize\\DisableMetaFiles"
            ],
            "dll_loaded": [
                "C:\\Users\\cuck\\AppData\\Local\\Temp\\e3a83f85d3245ef159c17fc9b170d2c8ff43528b2fdc65e4ebf9d686b07b63fc.bin.dll"
            ]
        },
        "first_seen": 1565326386.0312,
        "ppid": 2436
    },
    {
        "process_path": "C:\\Windows\\System32\\lsass.exe",
        "process_name": "lsass.exe",
        "pid": 476,
        "summary": {},
        "first_seen": 1565326385.5781,
        "ppid": 376
    }
]

Signatures

[
    {
        "markcount": 1,
        "families": [],
        "description": "This executable has a PDB path",
        "severity": 1,
        "marks": [
            {
                "category": "pdb_path",
                "ioc": "D:\\BUILD\\work\\00\\9f900bb44422fce3\\BUILDS\\Release\\x64\\vaarclient.pdb",
                "type": "ioc",
                "description": null
            }
        ],
        "references": [],
        "name": "has_pdb"
    },
    {
        "markcount": 1,
        "families": [],
        "description": "The executable contains unknown PE section names indicative of a packer (could be a false positive)",
        "severity": 1,
        "marks": [
            {
                "category": "section",
                "ioc": ".didat",
                "type": "ioc",
                "description": null
            }
        ],
        "references": [],
        "name": "pe_features"
    }
]

Yara

The Yara rules did not detect anything in the file.

Network

{
    "tls": [],
    "udp": [
        {
            "src": "192.168.56.101",
            "dst": "192.168.56.255",
            "offset": 546,
            "time": 3.0741229057312,
            "dport": 137,
            "sport": 137
        },
        {
            "src": "192.168.56.101",
            "dst": "224.0.0.252",
            "offset": 5074,
            "time": 3.0110960006714,
            "dport": 5355,
            "sport": 51001
        },
        {
            "src": "192.168.56.101",
            "dst": "224.0.0.252",
            "offset": 5402,
            "time": 1.0132570266724,
            "dport": 5355,
            "sport": 53595
        },
        {
            "src": "192.168.56.101",
            "dst": "224.0.0.252",
            "offset": 5730,
            "time": 3.0203928947449,
            "dport": 5355,
            "sport": 53848
        },
        {
            "src": "192.168.56.101",
            "dst": "224.0.0.252",
            "offset": 6058,
            "time": 1.5189518928528,
            "dport": 5355,
            "sport": 54255
        },
        {
            "src": "192.168.56.101",
            "dst": "224.0.0.252",
            "offset": 6386,
            "time": -0.099023103713989,
            "dport": 5355,
            "sport": 55314
        },
        {
            "src": "192.168.56.101",
            "dst": "239.255.255.250",
            "offset": 6714,
            "time": 1.5322148799896,
            "dport": 1900,
            "sport": 1900
        },
        {
            "src": "192.168.56.101",
            "dst": "239.255.255.250",
            "offset": 15396,
            "time": 1.0445129871368,
            "dport": 3702,
            "sport": 49152
        },
        {
            "src": "192.168.56.101",
            "dst": "239.255.255.250",
            "offset": 19588,
            "time": 3.1175589561462,
            "dport": 1900,
            "sport": 53598
        }
    ],
    "dns_servers": [],
    "http": [],
    "icmp": [],
    "smtp": [],
    "tcp": [],
    "smtp_ex": [],
    "mitm": [],
    "hosts": [],
    "pcap_sha256": "f9120521c348b31e1dfacf6baf7c9be94260ac34ffa22d3ebbfabc101c13a63c",
    "dns": [],
    "http_ex": [],
    "domains": [],
    "dead_hosts": [],
    "sorted_pcap_sha256": "65243f5e97688b54d28f1dd99eddb37ea1b10fef19451464a8f7cd4856a9edec",
    "irc": [],
    "https_ex": []
}

Screenshots

Screenshot from the sandboxScreenshot from the sandbox

Hashes [?]

PropertyValue
MD51b55ebae809c781d162edf2c9b90181d
SHA256e3a83f85d3245ef159c17fc9b170d2c8ff43528b2fdc65e4ebf9d686b07b63fc

What will you do with vaarclient.dll?

To help other users, please let us know what you will do with vaarclient.dll:



What did other users do?

The poll result listed below shows what users chose to do with vaarclient.dll. 0% have voted for removal. Based on votes from 3 users.

Votes
Keep100 %
3
Remove0 %
0

Malware or legitimate?

If you feel that you need more information to determine if your should keep this file or remove it, please read this guide.

Please select the option that best describe your thoughts on the information provided on this web page


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Comments

Please share with the other users what you think about this file. What does this file do? Is it legitimate or something that your computer is better without? Do you know how it was installed on your system? Did you install it yourself or did it come bundled with some other software? Is it running smoothly or do you get some error message? Any information that will help to document this file is welcome. Thank you for your contributions.

I'm reading all new comments so don't hesitate to post a question about the file. If I don't have the answer perhaps another user can help you.

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