What is OCHelper.dll?

OCHelper.dll is part of Microsoft Office and developed by Microsoft Corporation according to the OCHelper.dll version information.

OCHelper.dll's description is "Skype for Business"

OCHelper.dll is digitally signed by Microsoft Corporation.

OCHelper.dll is usually located in the 'C:\Program Files\Microsoft Office\root\VFS\ProgramFilesX86\Microsoft Office\Office16\' folder.

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

VirusTotal report

None of the 71 anti-virus programs at VirusTotal detected the OCHelper.dll file.

Sandbox Report

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

Summary

Successfully executed process in sandbox.

Summary

{
    "file_opened": [
        "C:\\Windows\\SysWOW64\\en-US\\KERNELBASE.dll.mui"
    ],
    "regkey_opened": [
        "HKEY_CLASSES_ROOT\\.dll",
        "HKEY_LOCAL_MACHINE\\SOFTWARE\\Classes\\dllfile\\AutoRegister",
        "HKEY_CLASSES_ROOT\\dllfile"
    ],
    "regkey_read": [
        "HKEY_LOCAL_MACHINE\\SOFTWARE\\Microsoft\\Windows NT\\CurrentVersion\\GRE_Initialize\\DisableMetaFiles",
        "HKEY_LOCAL_MACHINE\\SOFTWARE\\Classes\\.dll\\(Default)"
    ],
    "dll_loaded": [
        "C:\\Users\\cuck\\AppData\\Local\\Temp\\da5a1a9bda45ae8118f6f08620f81e110fcb06412f12e6f769003c2ba36505bb.bin.dll"
    ]
}

Generic

[
    {
        "process_path": "C:\\Windows\\System32\\lsass.exe",
        "process_name": "lsass.exe",
        "pid": 476,
        "summary": {},
        "first_seen": 1604897585.328125,
        "ppid": 376
    },
    {
        "process_path": "C:\\Windows\\SysWOW64\\regsvr32.exe",
        "process_name": "regsvr32.exe",
        "pid": 2460,
        "summary": {
            "file_opened": [
                "C:\\Windows\\SysWOW64\\en-US\\KERNELBASE.dll.mui"
            ],
            "regkey_opened": [
                "HKEY_CLASSES_ROOT\\.dll",
                "HKEY_LOCAL_MACHINE\\SOFTWARE\\Classes\\dllfile\\AutoRegister",
                "HKEY_CLASSES_ROOT\\dllfile"
            ],
            "regkey_read": [
                "HKEY_LOCAL_MACHINE\\SOFTWARE\\Microsoft\\Windows NT\\CurrentVersion\\GRE_Initialize\\DisableMetaFiles",
                "HKEY_LOCAL_MACHINE\\SOFTWARE\\Classes\\.dll\\(Default)"
            ],
            "dll_loaded": [
                "C:\\Users\\cuck\\AppData\\Local\\Temp\\da5a1a9bda45ae8118f6f08620f81e110fcb06412f12e6f769003c2ba36505bb.bin.dll"
            ]
        },
        "first_seen": 1604897585.734375,
        "ppid": 2740
    }
]

Signatures

[
    {
        "markcount": 1,
        "families": [],
        "description": "This executable has a PDB path",
        "severity": 1,
        "marks": [
            {
                "category": "pdb_path",
                "ioc": "d:\\dbs\\el\\jul\\target\\x86\\ship\\lyncextras_ochelper\\x-none\\OCHelper.pdb\u000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000",
                "type": "ioc",
                "description": null
            }
        ],
        "references": [],
        "name": "has_pdb"
    }
]

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": 662,
            "time": 6.220714807510376,
            "dport": 137,
            "sport": 137
        },
        {
            "src": "192.168.56.101",
            "dst": "224.0.0.252",
            "offset": 3462,
            "time": 6.170544862747192,
            "dport": 5355,
            "sport": 51001
        },
        {
            "src": "192.168.56.101",
            "dst": "224.0.0.252",
            "offset": 3790,
            "time": 4.159955978393555,
            "dport": 5355,
            "sport": 53595
        },
        {
            "src": "192.168.56.101",
            "dst": "224.0.0.252",
            "offset": 4118,
            "time": 6.1802098751068115,
            "dport": 5355,
            "sport": 53848
        },
        {
            "src": "192.168.56.101",
            "dst": "224.0.0.252",
            "offset": 4446,
            "time": 4.659665822982788,
            "dport": 5355,
            "sport": 54255
        },
        {
            "src": "192.168.56.101",
            "dst": "224.0.0.252",
            "offset": 4774,
            "time": 3.0514659881591797,
            "dport": 5355,
            "sport": 55314
        },
        {
            "src": "192.168.56.101",
            "dst": "239.255.255.250",
            "offset": 5102,
            "time": 4.674716949462891,
            "dport": 1900,
            "sport": 1900
        },
        {
            "src": "192.168.56.101",
            "dst": "239.255.255.250",
            "offset": 11572,
            "time": 4.19031286239624,
            "dport": 3702,
            "sport": 49152
        },
        {
            "src": "192.168.56.101",
            "dst": "239.255.255.250",
            "offset": 15764,
            "time": 6.267294883728027,
            "dport": 1900,
            "sport": 53598
        }
    ],
    "dns_servers": [],
    "http": [],
    "icmp": [],
    "smtp": [],
    "tcp": [],
    "smtp_ex": [],
    "mitm": [],
    "hosts": [],
    "pcap_sha256": "9b2bdace7f3793eab7da366fe85c2b2659378e8674565bf1735bd0244e1465a6",
    "dns": [],
    "http_ex": [],
    "domains": [],
    "dead_hosts": [],
    "sorted_pcap_sha256": "a8d0d96ffb77fa6d01f5554a1f1ea9e91caf3b2dfbb5cf196aa9963509adc078",
    "irc": [],
    "https_ex": []
}

Screenshots

Folder name variants

OCHelper.dll may also be located in other folders than C:\Program Files\Microsoft Office\root\VFS\ProgramFilesX86\Microsoft Office\Office16\. The most common variants are listed below:

• C:\Program Files (x86)\Microsoft Office\root\Office16\

Other files also named OCHelper.dll

OCHelper.dll (15 votes)

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.

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