What is freebl3.dll?

freebl3.dll is part of Firefox and developed by Mozilla Foundation according to the freebl3.dll version information.

freebl3.dll is digitally signed by Mozilla Corporation.

freebl3.dll is usually located in the 'c:\Program Files (x86)\Mozilla Firefox\' folder.

None of the anti-virus scanners at VirusTotal reports anything malicious about freebl3.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 72 anti-virus programs at VirusTotal detected the freebl3.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"
    ],
    "file_exists": [
        "C:\\Users\\cuck\\AppData\\Local\\Temp\\f4f668a9111e85026c3d6fe378d2dc99a4615c378280eccbe11f5ceed778f95c.bin.dll.manifest",
        "C:\\Users\\cuck\\AppData\\Local\\Temp\\f4f668a9111e85026c3d6fe378d2dc99a4615c378280eccbe11f5ceed778f95c.bin.dll"
    ],
    "regkey_read": [
        "HKEY_LOCAL_MACHINE\\SOFTWARE\\Wow6432Node\\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\\f4f668a9111e85026c3d6fe378d2dc99a4615c378280eccbe11f5ceed778f95c.bin.dll"
    ]
}

Generic

[
    {
        "process_path": "C:\\Windows\\SysWOW64\\rundll32.exe",
        "process_name": "rundll32.exe",
        "pid": 2740,
        "summary": {
            "file_opened": [
                "C:\\Windows\\SysWOW64\\en-US\\KERNELBASE.dll.mui"
            ],
            "file_exists": [
                "C:\\Users\\cuck\\AppData\\Local\\Temp\\f4f668a9111e85026c3d6fe378d2dc99a4615c378280eccbe11f5ceed778f95c.bin.dll.manifest",
                "C:\\Users\\cuck\\AppData\\Local\\Temp\\f4f668a9111e85026c3d6fe378d2dc99a4615c378280eccbe11f5ceed778f95c.bin.dll"
            ],
            "regkey_read": [
                "HKEY_LOCAL_MACHINE\\SOFTWARE\\Wow6432Node\\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\\f4f668a9111e85026c3d6fe378d2dc99a4615c378280eccbe11f5ceed778f95c.bin.dll"
            ]
        },
        "first_seen": 1584053585.625,
        "ppid": 1664
    },
    {
        "process_path": "C:\\Windows\\System32\\lsass.exe",
        "process_name": "lsass.exe",
        "pid": 476,
        "summary": {},
        "first_seen": 1584053585.359375,
        "ppid": 376
    }
]

Signatures

[
    {
        "markcount": 1,
        "families": [],
        "description": "This executable has a PDB path",
        "severity": 1,
        "marks": [
            {
                "category": "pdb_path",
                "ioc": "z:\\task_1583748103\\build\\src\\obj-firefox\\security\\nss\\lib\\freebl\\freebl_freebl3\\freebl3.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": ".00cfg",
                "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": 3.062640905380249,
            "dport": 137,
            "sport": 137
        },
        {
            "src": "192.168.56.101",
            "dst": "224.0.0.252",
            "offset": 5074,
            "time": 3.0232038497924805,
            "dport": 5355,
            "sport": 51001
        },
        {
            "src": "192.168.56.101",
            "dst": "224.0.0.252",
            "offset": 5402,
            "time": 1.0421569347381592,
            "dport": 5355,
            "sport": 53595
        },
        {
            "src": "192.168.56.101",
            "dst": "224.0.0.252",
            "offset": 5730,
            "time": 3.035047769546509,
            "dport": 5355,
            "sport": 53848
        },
        {
            "src": "192.168.56.101",
            "dst": "224.0.0.252",
            "offset": 6058,
            "time": 1.553095817565918,
            "dport": 5355,
            "sport": 54255
        },
        {
            "src": "192.168.56.101",
            "dst": "224.0.0.252",
            "offset": 6386,
            "time": -0.09536123275756836,
            "dport": 5355,
            "sport": 55314
        },
        {
            "src": "192.168.56.101",
            "dst": "239.255.255.250",
            "offset": 6714,
            "time": 1.5488197803497314,
            "dport": 1900,
            "sport": 1900
        },
        {
            "src": "192.168.56.101",
            "dst": "239.255.255.250",
            "offset": 16512,
            "time": 1.0627617835998535,
            "dport": 3702,
            "sport": 49152
        },
        {
            "src": "192.168.56.101",
            "dst": "239.255.255.250",
            "offset": 24896,
            "time": 3.125358819961548,
            "dport": 1900,
            "sport": 53598
        }
    ],
    "dns_servers": [],
    "http": [],
    "icmp": [],
    "smtp": [],
    "tcp": [],
    "smtp_ex": [],
    "mitm": [],
    "hosts": [],
    "pcap_sha256": "d402e674edb00d723fded9349d7feef5c4d861e9157b5e88b24d50316a603ef1",
    "dns": [],
    "http_ex": [],
    "domains": [],
    "dead_hosts": [],
    "sorted_pcap_sha256": "6152d2dc800ede9035a649f2a544866c214c8b617a89d551a648ff2ec280abc1",
    "irc": [],
    "https_ex": []
}

Screenshots

Other files also named freebl3.dll

freebl3.dll (7 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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