What is vsocklib.dll?

vsocklib.dll is part of VMware Tools and developed by VMware, Inc. according to the vsocklib.dll version information.

vsocklib.dll's description is "VSockets Library"

vsocklib.dll is digitally signed by VMware, Inc..

vsocklib.dll is usually located in the 'C:\WINDOWS\system32\' folder.

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

PropertyValue
Product nameVMware Tools
Company nameVMware, Inc.
File descriptionVSockets Library
Internal namevsocklib
Original filenamevsocklib.DLL
Legal copyrightCopyright © 1998-2020 VMware, Inc.
Product version11.1.5 build-16460229
File version9.8.17.0

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

Product nameVMware Tools
Company nameVMware, Inc.
File descriptionVSockets Library
Internal namevsocklib
Original filenamevsocklib.DLL
Legal copyrightCopyright © 1998-2020 VMware, Inc.
Product version11.1.5 build-16460229
File version9.8.17.0

Digital signatures [?]

vsocklib.dll has a valid digital signature.

PropertyValue
Signer nameVMware, Inc.
Certificate issuer nameDigiCert Assured ID Code Signing CA-1
Certificate serial number090eaa294cd4abd9eb1cc784c924243d

VirusTotal report

None of the 65 anti-virus programs at VirusTotal detected the vsocklib.dll file.

None of the 65 anti-virus programs detected the vsocklib.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\\7262aa18af80fb6bc2d2b316e0b606331d51222b76554bf3c4e36ba83ab8683d.bin.dll"
    ],
    "file_opened": [
        "C:\\Windows\\System32\\en-US\\KERNELBASE.dll.mui",
        "C:\\Users\\cuck\\AppData\\Local\\Temp\\7262aa18af80fb6bc2d2b316e0b606331d51222b76554bf3c4e36ba83ab8683d.bin.dll"
    ],
    "command_line": [
        "\"C:\\Windows\\System32\\rundll32.exe\" C:\\Users\\cuck\\AppData\\Local\\Temp\\7262aa18af80fb6bc2d2b316e0b606331d51222b76554bf3c4e36ba83ab8683d.bin.dll,DllMain"
    ],
    "file_exists": [
        "C:\\Users\\cuck\\AppData\\Local\\Temp\\7262aa18af80fb6bc2d2b316e0b606331d51222b76554bf3c4e36ba83ab8683d.bin.dll",
        "C:\\Users\\cuck\\AppData\\Local\\Temp\\7262aa18af80fb6bc2d2b316e0b606331d51222b76554bf3c4e36ba83ab8683d.bin.dll.manifest"
    ],
    "file_read": [
        "C:\\Users\\cuck\\AppData\\Local\\Temp\\7262aa18af80fb6bc2d2b316e0b606331d51222b76554bf3c4e36ba83ab8683d.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": 2460,
        "summary": {
            "dll_loaded": [
                "C:\\Users\\cuck\\AppData\\Local\\Temp\\7262aa18af80fb6bc2d2b316e0b606331d51222b76554bf3c4e36ba83ab8683d.bin.dll"
            ],
            "file_opened": [
                "C:\\Users\\cuck\\AppData\\Local\\Temp\\7262aa18af80fb6bc2d2b316e0b606331d51222b76554bf3c4e36ba83ab8683d.bin.dll"
            ],
            "command_line": [
                "\"C:\\Windows\\System32\\rundll32.exe\" C:\\Users\\cuck\\AppData\\Local\\Temp\\7262aa18af80fb6bc2d2b316e0b606331d51222b76554bf3c4e36ba83ab8683d.bin.dll,DllMain"
            ],
            "file_exists": [
                "C:\\Users\\cuck\\AppData\\Local\\Temp\\7262aa18af80fb6bc2d2b316e0b606331d51222b76554bf3c4e36ba83ab8683d.bin.dll",
                "C:\\Users\\cuck\\AppData\\Local\\Temp\\7262aa18af80fb6bc2d2b316e0b606331d51222b76554bf3c4e36ba83ab8683d.bin.dll.manifest"
            ],
            "file_read": [
                "C:\\Users\\cuck\\AppData\\Local\\Temp\\7262aa18af80fb6bc2d2b316e0b606331d51222b76554bf3c4e36ba83ab8683d.bin.dll"
            ],
            "regkey_read": [
                "HKEY_LOCAL_MACHINE\\SOFTWARE\\Microsoft\\Windows NT\\CurrentVersion\\GRE_Initialize\\DisableMetaFiles"
            ]
        },
        "first_seen": 1600487587.796875,
        "ppid": 2740
    },
    {
        "process_path": "C:\\Windows\\System32\\rundll32.exe",
        "process_name": "rundll32.exe",
        "pid": 2500,
        "summary": {
            "file_opened": [
                "C:\\Windows\\System32\\en-US\\KERNELBASE.dll.mui"
            ],
            "file_exists": [
                "C:\\Users\\cuck\\AppData\\Local\\Temp\\7262aa18af80fb6bc2d2b316e0b606331d51222b76554bf3c4e36ba83ab8683d.bin.dll",
                "C:\\Users\\cuck\\AppData\\Local\\Temp\\7262aa18af80fb6bc2d2b316e0b606331d51222b76554bf3c4e36ba83ab8683d.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\\7262aa18af80fb6bc2d2b316e0b606331d51222b76554bf3c4e36ba83ab8683d.bin.dll"
            ]
        },
        "first_seen": 1600487588.03125,
        "ppid": 2460
    },
    {
        "process_path": "C:\\Windows\\System32\\lsass.exe",
        "process_name": "lsass.exe",
        "pid": 476,
        "summary": {},
        "first_seen": 1600487587.34375,
        "ppid": 376
    }
]

Signatures

[
    {
        "markcount": 1,
        "families": [],
        "description": "This executable has a PDB path",
        "severity": 1,
        "marks": [
            {
                "category": "pdb_path",
                "ioc": "d:\\build\\ob\\bora-16460229\\bora-vmsoft\\build\\release-x64\\apps\\vsockLib\\vsocklib.pdb",
                "type": "ioc",
                "description": null
            }
        ],
        "references": [],
        "name": "has_pdb"
    }
]

Yara

[
    {
        "meta": {
            "description": "Possibly employs anti-virtualization techniques",
            "author": "nex"
        },
        "name": "vmdetect",
        "offsets": {
            "vmware24": [
                [
                    20615,
                    0
                ],
                [
                    20622,
                    0
                ],
                [
                    23740,
                    0
                ],
                [
                    23763,
                    0
                ],
                [
                    23800,
                    1
                ],
                [
                    30202,
                    1
                ],
                [
                    40040,
                    0
                ],
                [
                    40063,
                    0
                ],
                [
                    44097,
                    1
                ]
            ]
        },
        "strings": [
            "Vk13YXJl",
            "dm13YXJl"
        ]
    }
]

Network

{
    "tls": [],
    "udp": [
        {
            "src": "192.168.56.101",
            "dst": "192.168.56.255",
            "offset": 662,
            "time": 6.2282209396362305,
            "dport": 137,
            "sport": 137
        },
        {
            "src": "192.168.56.101",
            "dst": "224.0.0.252",
            "offset": 5190,
            "time": 6.16214394569397,
            "dport": 5355,
            "sport": 51001
        },
        {
            "src": "192.168.56.101",
            "dst": "224.0.0.252",
            "offset": 5518,
            "time": 4.16884708404541,
            "dport": 5355,
            "sport": 53595
        },
        {
            "src": "192.168.56.101",
            "dst": "224.0.0.252",
            "offset": 5846,
            "time": 6.16963791847229,
            "dport": 5355,
            "sport": 53848
        },
        {
            "src": "192.168.56.101",
            "dst": "224.0.0.252",
            "offset": 6174,
            "time": 4.670120000839233,
            "dport": 5355,
            "sport": 54255
        },
        {
            "src": "192.168.56.101",
            "dst": "224.0.0.252",
            "offset": 6502,
            "time": 3.062911033630371,
            "dport": 5355,
            "sport": 55314
        },
        {
            "src": "192.168.56.101",
            "dst": "239.255.255.250",
            "offset": 6830,
            "time": 4.23658299446106,
            "dport": 1900,
            "sport": 1900
        },
        {
            "src": "192.168.56.101",
            "dst": "239.255.255.250",
            "offset": 18678,
            "time": 4.199460029602051,
            "dport": 3702,
            "sport": 49152
        },
        {
            "src": "192.168.56.101",
            "dst": "239.255.255.250",
            "offset": 22870,
            "time": 6.245485067367554,
            "dport": 1900,
            "sport": 53598
        }
    ],
    "dns_servers": [],
    "http": [],
    "icmp": [],
    "smtp": [],
    "tcp": [],
    "smtp_ex": [],
    "mitm": [],
    "hosts": [],
    "pcap_sha256": "9cf24fffbc0c74094ada1bf60df240fa8bb687e581d855c49fe1e1d613b905ca",
    "dns": [],
    "http_ex": [],
    "domains": [],
    "dead_hosts": [],
    "sorted_pcap_sha256": "5c5c5bff7220de2dee024bbff37b6f9bed78627650ba5764bad447b5138ade75",
    "irc": [],
    "https_ex": []
}

Screenshots

Screenshot from the sandboxScreenshot from the sandbox

Folder name variants

vsocklib.dll may also be located in other folders than C:\WINDOWS\system32\. The most common variants are listed below:

Other files also named vsocklib.dll

vsocklib.dll (40 votes)

Hashes [?]

PropertyValue
MD5ab3b037bded3fea0f47659c1544bcbf1
SHA2567262aa18af80fb6bc2d2b316e0b606331d51222b76554bf3c4e36ba83ab8683d

What will you do with vsocklib.dll?

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



What did other users do?

The poll result listed below shows what users chose to do with vsocklib.dll. 50% have voted for removal. Based on votes from 2 users.

User vote results: There were 1 vote to remove and 1 vote to keep

NOTE: Please do not use this poll as the only source of input to determine what you will do with vsocklib.dll. Only 2 users has voted so far so it does not offer a high degree of confidence.

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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