What is FastWifiCru2.dll?

FastWifiCru2.dll is part of FastWifi and developed by 北京小??芽网?科技有限公司 according to the FastWifiCru2.dll version information.

FastWifiCru2.dll's description is "FastWifi"

FastWifiCru2.dll is digitally signed by 北京小??芽网?科技有限公司.

FastWifiCru2.dll is usually located in the 'C:\WINDOWS\system32\' folder.

Some of the anti-virus scanners at VirusTotal detected FastWifiCru2.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

1 of the 72 anti-virus programs at VirusTotal detected the FastWifiCru2.dll file. That's a 1% detection rate.

Scanner	Detection Name
Webroot	W32.Adware.Gen

Sandbox Report

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

Summary

Successfully executed process in sandbox.

Summary

{
    "dll_loaded": [
        "kernel32",
        "api-ms-win-core-localization-l1-2-1",
        "C:\\Users\\cuck\\AppData\\Local\\Temp\\c5dcbd7bda51c0fddd362bbbe01bbd9726ba066950713ba022b54edfe1e3c4b9.bin.dll",
        "api-ms-win-core-fibers-l1-1-1",
        "api-ms-win-core-synch-l1-2-0"
    ],
    "file_opened": [
        "C:\\Users\\cuck\\AppData\\Local\\Temp\\c5dcbd7bda51c0fddd362bbbe01bbd9726ba066950713ba022b54edfe1e3c4b9.bin.dll"
    ],
    "command_line": [
        "\"C:\\Windows\\System32\\rundll32.exe\" C:\\Users\\cuck\\AppData\\Local\\Temp\\c5dcbd7bda51c0fddd362bbbe01bbd9726ba066950713ba022b54edfe1e3c4b9.bin.dll,DllMain"
    ],
    "file_exists": [
        "C:\\Users\\cuck\\AppData\\Local\\Temp\\c5dcbd7bda51c0fddd362bbbe01bbd9726ba066950713ba022b54edfe1e3c4b9.bin.dll",
        "C:\\Users\\cuck\\AppData\\Local\\Temp\\c5dcbd7bda51c0fddd362bbbe01bbd9726ba066950713ba022b54edfe1e3c4b9.bin.dll.manifest"
    ],
    "file_read": [
        "C:\\Users\\cuck\\AppData\\Local\\Temp\\c5dcbd7bda51c0fddd362bbbe01bbd9726ba066950713ba022b54edfe1e3c4b9.bin.dll"
    ],
    "regkey_read": [
        "HKEY_LOCAL_MACHINE\\SOFTWARE\\Microsoft\\OLE\\PageAllocatorSystemHeapIsPrivate",
        "HKEY_LOCAL_MACHINE\\SOFTWARE\\Microsoft\\Windows NT\\CurrentVersion\\GRE_Initialize\\DisableMetaFiles",
        "HKEY_LOCAL_MACHINE\\SOFTWARE\\Microsoft\\OLE\\PageAllocatorUseSystemHeap"
    ]
}

Generic

[
    {
        "process_path": "C:\\Windows\\SysWOW64\\rundll32.exe",
        "process_name": "rundll32.exe",
        "pid": 3040,
        "summary": {
            "dll_loaded": [
                "C:\\Users\\cuck\\AppData\\Local\\Temp\\c5dcbd7bda51c0fddd362bbbe01bbd9726ba066950713ba022b54edfe1e3c4b9.bin.dll"
            ],
            "file_opened": [
                "C:\\Users\\cuck\\AppData\\Local\\Temp\\c5dcbd7bda51c0fddd362bbbe01bbd9726ba066950713ba022b54edfe1e3c4b9.bin.dll"
            ],
            "command_line": [
                "\"C:\\Windows\\System32\\rundll32.exe\" C:\\Users\\cuck\\AppData\\Local\\Temp\\c5dcbd7bda51c0fddd362bbbe01bbd9726ba066950713ba022b54edfe1e3c4b9.bin.dll,DllMain"
            ],
            "file_exists": [
                "C:\\Users\\cuck\\AppData\\Local\\Temp\\c5dcbd7bda51c0fddd362bbbe01bbd9726ba066950713ba022b54edfe1e3c4b9.bin.dll",
                "C:\\Users\\cuck\\AppData\\Local\\Temp\\c5dcbd7bda51c0fddd362bbbe01bbd9726ba066950713ba022b54edfe1e3c4b9.bin.dll.manifest"
            ],
            "file_read": [
                "C:\\Users\\cuck\\AppData\\Local\\Temp\\c5dcbd7bda51c0fddd362bbbe01bbd9726ba066950713ba022b54edfe1e3c4b9.bin.dll"
            ],
            "regkey_read": [
                "HKEY_LOCAL_MACHINE\\SOFTWARE\\Microsoft\\Windows NT\\CurrentVersion\\GRE_Initialize\\DisableMetaFiles"
            ]
        },
        "first_seen": 1595037189.703125,
        "ppid": 1560
    },
    {
        "process_path": "C:\\Windows\\System32\\rundll32.exe",
        "process_name": "rundll32.exe",
        "pid": 856,
        "summary": {
            "file_exists": [
                "C:\\Users\\cuck\\AppData\\Local\\Temp\\c5dcbd7bda51c0fddd362bbbe01bbd9726ba066950713ba022b54edfe1e3c4b9.bin.dll",
                "C:\\Users\\cuck\\AppData\\Local\\Temp\\c5dcbd7bda51c0fddd362bbbe01bbd9726ba066950713ba022b54edfe1e3c4b9.bin.dll.manifest"
            ],
            "regkey_read": [
                "HKEY_LOCAL_MACHINE\\SOFTWARE\\Microsoft\\OLE\\PageAllocatorSystemHeapIsPrivate",
                "HKEY_LOCAL_MACHINE\\SOFTWARE\\Microsoft\\Windows NT\\CurrentVersion\\GRE_Initialize\\DisableMetaFiles",
                "HKEY_LOCAL_MACHINE\\SOFTWARE\\Microsoft\\OLE\\PageAllocatorUseSystemHeap"
            ],
            "dll_loaded": [
                "kernel32",
                "api-ms-win-core-localization-l1-2-1",
                "C:\\Users\\cuck\\AppData\\Local\\Temp\\c5dcbd7bda51c0fddd362bbbe01bbd9726ba066950713ba022b54edfe1e3c4b9.bin.dll",
                "api-ms-win-core-fibers-l1-1-1",
                "api-ms-win-core-synch-l1-2-0"
            ]
        },
        "first_seen": 1595037189.96875,
        "ppid": 3040
    },
    {
        "process_path": "C:\\Windows\\System32\\lsass.exe",
        "process_name": "lsass.exe",
        "pid": 476,
        "summary": {},
        "first_seen": 1595037189.453125,
        "ppid": 376
    }
]

Signatures

[
    {
        "markcount": 1,
        "families": [],
        "description": "Foreign language identified in PE resource",
        "severity": 2,
        "marks": [
            {
                "name": "RT_VERSION",
                "language": "LANG_CHINESE",
                "offset": "0x0003c0a0",
                "filetype": "data",
                "sublanguage": "SUBLANG_CHINESE_SIMPLIFIED",
                "type": "generic",
                "size": "0x000002b4"
            }
        ],
        "references": [],
        "name": "origin_langid"
    }
]

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": 6.108170032501221,
            "dport": 137,
            "sport": 137
        },
        {
            "src": "192.168.56.101",
            "dst": "224.0.0.252",
            "offset": 5694,
            "time": 6.049513101577759,
            "dport": 5355,
            "sport": 51001
        },
        {
            "src": "192.168.56.101",
            "dst": "224.0.0.252",
            "offset": 6022,
            "time": 4.144611120223999,
            "dport": 5355,
            "sport": 53595
        },
        {
            "src": "192.168.56.101",
            "dst": "224.0.0.252",
            "offset": 6350,
            "time": 6.067355155944824,
            "dport": 5355,
            "sport": 53848
        },
        {
            "src": "192.168.56.101",
            "dst": "224.0.0.252",
            "offset": 6678,
            "time": 4.66457200050354,
            "dport": 5355,
            "sport": 54255
        },
        {
            "src": "192.168.56.101",
            "dst": "224.0.0.252",
            "offset": 7006,
            "time": 2.9331769943237305,
            "dport": 5355,
            "sport": 55314
        },
        {
            "src": "192.168.56.101",
            "dst": "239.255.255.250",
            "offset": 7334,
            "time": 4.671826124191284,
            "dport": 1900,
            "sport": 1900
        },
        {
            "src": "192.168.56.101",
            "dst": "239.255.255.250",
            "offset": 18280,
            "time": 4.173898220062256,
            "dport": 3702,
            "sport": 49152
        },
        {
            "src": "192.168.56.101",
            "dst": "239.255.255.250",
            "offset": 26664,
            "time": 6.217006206512451,
            "dport": 1900,
            "sport": 53598
        }
    ],
    "dns_servers": [],
    "http": [],
    "icmp": [],
    "smtp": [],
    "tcp": [],
    "smtp_ex": [],
    "mitm": [],
    "hosts": [],
    "pcap_sha256": "90f589853e45dcded3b05a1284de69387c7d9d3c1fab99fbe13c42e4d876c0ef",
    "dns": [],
    "http_ex": [],
    "domains": [],
    "dead_hosts": [],
    "sorted_pcap_sha256": "2ec1583beadc66d1e2da8e4904044e49ae2e4278aafa0d782a87f48a24525b33",
    "irc": [],
    "https_ex": []
}

Screenshots

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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