What is b57w2k.sys?

b57w2k.sys is part of Broadcom NetXtreme Gigabit Ethernet Driver and developed by Broadcom Corporation according to the b57w2k.sys version information.

b57w2k.sys's description is "Broadcom NetXtreme Gigabit Ethernet NDIS5 Driver."

b57w2k.sys is digitally signed by Microsoft Windows Hardware Compatibility Publisher.

b57w2k.sys is usually located in the 'c:\WINDOWS\system32\DRVSTORE\b57win32_90665E260F56889413ADE359D2D21AE72D7882DC\' folder.

None of the anti-virus scanners at VirusTotal reports anything malicious about b57w2k.sys.

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 67 anti-virus programs at VirusTotal detected the b57w2k.sys file.

Sandbox Report

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

Summary

ERROR: Failed to execute process.

Generic

[
    {
        "process_path": "C:\\Windows\\System32\\lsass.exe",
        "process_name": "lsass.exe",
        "pid": 476,
        "summary": {},
        "first_seen": 1577811186.34375,
        "ppid": 376
    }
]

Signatures

[
    {
        "markcount": 2,
        "families": [],
        "description": "The executable contains unknown PE section names indicative of a packer (could be a false positive)",
        "severity": 1,
        "marks": [
            {
                "category": "section",
                "ioc": "PAGE",
                "type": "ioc",
                "description": null
            },
            {
                "category": "section",
                "ioc": "INIT",
                "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": "224.0.0.252",
            "offset": 826,
            "time": 4.146782159805298,
            "dport": 5355,
            "sport": 53595
        },
        {
            "src": "192.168.56.101",
            "dst": "224.0.0.252",
            "offset": 1154,
            "time": 3.0233821868896484,
            "dport": 5355,
            "sport": 55314
        },
        {
            "src": "192.168.56.101",
            "dst": "239.255.255.250",
            "offset": 1482,
            "time": 4.169321060180664,
            "dport": 3702,
            "sport": 49152
        }
    ],
    "dns_servers": [],
    "http": [],
    "icmp": [],
    "smtp": [],
    "tcp": [],
    "smtp_ex": [],
    "mitm": [],
    "hosts": [],
    "pcap_sha256": "5b7f97247e250721f0de87c55081e87280274a633eb3a6f329e501f7d1a18d5e",
    "dns": [],
    "http_ex": [],
    "domains": [],
    "dead_hosts": [],
    "sorted_pcap_sha256": "fbea9f0c10330b930327161329987fdea223a87eaffcc7cd7227efe864ae6250",
    "irc": [],
    "https_ex": []
}

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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