What is authuitu.dll?

authuitu.dll is part of AVG PC TuneUp and developed by AVG Technologies CZ, s.r.o. according to the authuitu.dll version information.

authuitu.dll's description is "AVG WinLogon Extension"

authuitu.dll is digitally signed by AVG Technologies CZ, s.r.o..

authuitu.dll is usually located in the 'C:\Windows\system32\' folder.

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

PropertyValue
Product nameAVG PC TuneUp
Company nameAVG Technologies CZ, s.r.o.
File descriptionAVG WinLogon Extension
Internal nameauthuitu-x64.dll
Original filenameauthuitu-x64.dll
Legal copyrightCopyright (C) 2014 AVG Technologies CZ, s.r.o.
Private buildx64 Release_Unicode_MT_SLL
Product version16.80.3.38236
File version16.80.3.38236
Special buildTuneUpCompile_2019_0110_130224(234844), SVNRev 5b8bfa4bdd5afb8f640ecc3c35c0041299795c34 (release/tuneup/PCT2016-1.80), tuneup

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

Product nameAVG PC TuneUp
Company nameAVG Technologies CZ, s.r.o.
File descriptionAVG WinLogon Extension
Internal nameauthuitu-x64.dll
Original filenameauthuitu-x64.dll
Legal copyrightCopyright (C) 2014 AVG Technologies ..
Private buildx64 Release_Unicode_MT_SLL
Product version16.80.3.38236
File version16.80.3.38236
Special buildTuneUpCompile_2019_0110_130224(23484..

Digital signatures [?]

authuitu.dll has a valid digital signature.

PropertyValue
Signer nameAVG Technologies CZ, s.r.o.
Certificate issuer nameDigiCert SHA2 Assured ID Code Signing CA
Certificate serial number0a6eedb7ea5b35f274e88583d1285fc8

VirusTotal report

None of the 68 anti-virus programs at VirusTotal detected the authuitu.dll file.

None of the 68 anti-virus programs detected the authuitu.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\\73e0628b59bc72773af060c2ae933892060ca4330cf9cdd8ce91af7f1ad86b7f.bin.dll",
        "authui.dll"
    ],
    "file_opened": [
        "C:\\Windows\\System32\\authui.dll",
        "C:\\Users\\cuck\\AppData\\Local\\Temp\\73e0628b59bc72773af060c2ae933892060ca4330cf9cdd8ce91af7f1ad86b7f.bin.dll",
        "C:\\Windows\\System32\\cryptui.dll",
        "C:\\Windows\\WindowsShell.Manifest"
    ],
    "regkey_opened": [
        "HKEY_CLASSES_ROOT\\CLSID\\{7986d495-ce42-4926-8afc-26dfa299cadb}\\InProcServer32",
        "HKEY_CLASSES_ROOT\\CLSID\\{00711705-12C5-420B-A4E5-6413F2AB3C7B}\\Parameters"
    ],
    "file_exists": [
        "C:\\Users\\cuck\\AppData\\Local\\Temp\\73e0628b59bc72773af060c2ae933892060ca4330cf9cdd8ce91af7f1ad86b7f.bin.dll",
        "C:\\Users\\cuck\\AppData\\Local\\Temp\\73e0628b59bc72773af060c2ae933892060ca4330cf9cdd8ce91af7f1ad86b7f.bin.dll.manifest"
    ],
    "command_line": [
        "\"C:\\Windows\\System32\\rundll32.exe\" C:\\Users\\cuck\\AppData\\Local\\Temp\\73e0628b59bc72773af060c2ae933892060ca4330cf9cdd8ce91af7f1ad86b7f.bin.dll,DllMain"
    ],
    "file_read": [
        "C:\\Users\\cuck\\AppData\\Local\\Temp\\73e0628b59bc72773af060c2ae933892060ca4330cf9cdd8ce91af7f1ad86b7f.bin.dll"
    ],
    "regkey_read": [
        "HKEY_LOCAL_MACHINE\\SOFTWARE\\Microsoft\\Windows\\CurrentVersion\\SideBySide\\PreferExternalManifest",
        "HKEY_LOCAL_MACHINE\\SOFTWARE\\Microsoft\\Windows NT\\CurrentVersion\\GRE_Initialize\\DisableMetaFiles",
        "HKEY_LOCAL_MACHINE\\SOFTWARE\\Classes\\CLSID\\{7986d495-ce42-4926-8afc-26dfa299cadb}\\InProcServer32\\{00711705-12C5-420B-A4E5-6413F2AB3C7B}",
        "HKEY_LOCAL_MACHINE\\SOFTWARE\\Classes\\CLSID\\{00711705-12C5-420B-A4E5-6413F2AB3C7B}\\Parameters\\AuthUiRc"
    ]
}

Generic

[
    {
        "process_path": "C:\\Windows\\SysWOW64\\rundll32.exe",
        "process_name": "rundll32.exe",
        "pid": 1664,
        "summary": {
            "dll_loaded": [
                "C:\\Users\\cuck\\AppData\\Local\\Temp\\73e0628b59bc72773af060c2ae933892060ca4330cf9cdd8ce91af7f1ad86b7f.bin.dll"
            ],
            "file_opened": [
                "C:\\Users\\cuck\\AppData\\Local\\Temp\\73e0628b59bc72773af060c2ae933892060ca4330cf9cdd8ce91af7f1ad86b7f.bin.dll"
            ],
            "command_line": [
                "\"C:\\Windows\\System32\\rundll32.exe\" C:\\Users\\cuck\\AppData\\Local\\Temp\\73e0628b59bc72773af060c2ae933892060ca4330cf9cdd8ce91af7f1ad86b7f.bin.dll,DllMain"
            ],
            "file_exists": [
                "C:\\Users\\cuck\\AppData\\Local\\Temp\\73e0628b59bc72773af060c2ae933892060ca4330cf9cdd8ce91af7f1ad86b7f.bin.dll",
                "C:\\Users\\cuck\\AppData\\Local\\Temp\\73e0628b59bc72773af060c2ae933892060ca4330cf9cdd8ce91af7f1ad86b7f.bin.dll.manifest"
            ],
            "file_read": [
                "C:\\Users\\cuck\\AppData\\Local\\Temp\\73e0628b59bc72773af060c2ae933892060ca4330cf9cdd8ce91af7f1ad86b7f.bin.dll"
            ],
            "regkey_read": [
                "HKEY_LOCAL_MACHINE\\SOFTWARE\\Microsoft\\Windows NT\\CurrentVersion\\GRE_Initialize\\DisableMetaFiles"
            ]
        },
        "first_seen": 1568217185.5781,
        "ppid": 3040
    },
    {
        "process_path": "C:\\Windows\\System32\\lsass.exe",
        "process_name": "lsass.exe",
        "pid": 476,
        "summary": {},
        "first_seen": 1568217185.3125,
        "ppid": 376
    },
    {
        "process_path": "C:\\Windows\\System32\\rundll32.exe",
        "process_name": "rundll32.exe",
        "pid": 2588,
        "summary": {
            "file_opened": [
                "C:\\Windows\\System32\\authui.dll",
                "C:\\Windows\\System32\\cryptui.dll",
                "C:\\Windows\\WindowsShell.Manifest"
            ],
            "file_exists": [
                "C:\\Users\\cuck\\AppData\\Local\\Temp\\73e0628b59bc72773af060c2ae933892060ca4330cf9cdd8ce91af7f1ad86b7f.bin.dll",
                "C:\\Users\\cuck\\AppData\\Local\\Temp\\73e0628b59bc72773af060c2ae933892060ca4330cf9cdd8ce91af7f1ad86b7f.bin.dll.manifest"
            ],
            "regkey_opened": [
                "HKEY_CLASSES_ROOT\\CLSID\\{7986d495-ce42-4926-8afc-26dfa299cadb}\\InProcServer32",
                "HKEY_CLASSES_ROOT\\CLSID\\{00711705-12C5-420B-A4E5-6413F2AB3C7B}\\Parameters"
            ],
            "regkey_read": [
                "HKEY_LOCAL_MACHINE\\SOFTWARE\\Microsoft\\Windows\\CurrentVersion\\SideBySide\\PreferExternalManifest",
                "HKEY_LOCAL_MACHINE\\SOFTWARE\\Microsoft\\Windows NT\\CurrentVersion\\GRE_Initialize\\DisableMetaFiles",
                "HKEY_LOCAL_MACHINE\\SOFTWARE\\Classes\\CLSID\\{7986d495-ce42-4926-8afc-26dfa299cadb}\\InProcServer32\\{00711705-12C5-420B-A4E5-6413F2AB3C7B}",
                "HKEY_LOCAL_MACHINE\\SOFTWARE\\Classes\\CLSID\\{00711705-12C5-420B-A4E5-6413F2AB3C7B}\\Parameters\\AuthUiRc"
            ],
            "dll_loaded": [
                "C:\\Users\\cuck\\AppData\\Local\\Temp\\73e0628b59bc72773af060c2ae933892060ca4330cf9cdd8ce91af7f1ad86b7f.bin.dll",
                "authui.dll"
            ]
        },
        "first_seen": 1568217185.9062,
        "ppid": 1664
    }
]

Signatures

[
    {
        "markcount": 1,
        "families": [],
        "description": "This executable has a PDB path",
        "severity": 1,
        "marks": [
            {
                "category": "pdb_path",
                "ioc": "D:\\build\\user\\234844_TUNEUP-COM0-51\\source\\build\\tuneup\\RU_MT_SLL!x64_vs140\\bin\\Release_Unicode_MT_SLL_vs140\\x64\\authuitu-x64.pdb",
                "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": 546,
            "time": 3.0759100914001,
            "dport": 137,
            "sport": 137
        },
        {
            "src": "192.168.56.101",
            "dst": "224.0.0.252",
            "offset": 5326,
            "time": 3.0116848945618,
            "dport": 5355,
            "sport": 51001
        },
        {
            "src": "192.168.56.101",
            "dst": "224.0.0.252",
            "offset": 5654,
            "time": 1.0197460651398,
            "dport": 5355,
            "sport": 53595
        },
        {
            "src": "192.168.56.101",
            "dst": "224.0.0.252",
            "offset": 5982,
            "time": 3.0206050872803,
            "dport": 5355,
            "sport": 53848
        },
        {
            "src": "192.168.56.101",
            "dst": "224.0.0.252",
            "offset": 6310,
            "time": 1.5182371139526,
            "dport": 5355,
            "sport": 54255
        },
        {
            "src": "192.168.56.101",
            "dst": "224.0.0.252",
            "offset": 6638,
            "time": -0.091039896011353,
            "dport": 5355,
            "sport": 55314
        },
        {
            "src": "192.168.56.101",
            "dst": "239.255.255.250",
            "offset": 6966,
            "time": 1.0944790840149,
            "dport": 1900,
            "sport": 1900
        },
        {
            "src": "192.168.56.101",
            "dst": "239.255.255.250",
            "offset": 18814,
            "time": 1.0424370765686,
            "dport": 3702,
            "sport": 49152
        },
        {
            "src": "192.168.56.101",
            "dst": "239.255.255.250",
            "offset": 27198,
            "time": 3.1081840991974,
            "dport": 1900,
            "sport": 53598
        }
    ],
    "dns_servers": [],
    "http": [],
    "icmp": [],
    "smtp": [],
    "tcp": [],
    "smtp_ex": [],
    "mitm": [],
    "hosts": [],
    "pcap_sha256": "58097bd04a618ca3f22a9dd09df4bdd7d26b60d9df4d5dd42762026d49337baa",
    "dns": [],
    "http_ex": [],
    "domains": [],
    "dead_hosts": [],
    "sorted_pcap_sha256": "369f9615c1a73184ce5352dfcae5114de1a8ce432ddc6756f67c2e62a5929bd6",
    "irc": [],
    "https_ex": []
}

Screenshots

Screenshot from the sandboxScreenshot from the sandbox

Other files also named authuitu.dll

authuitu.dll (7 votes)

Hashes [?]

PropertyValue
MD5936cebf61e4a48aa2693791a2b112c30
SHA25673e0628b59bc72773af060c2ae933892060ca4330cf9cdd8ce91af7f1ad86b7f

What will you do with authuitu.dll?

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



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


Free online surveys

And now some shameless self promotion ;)

A screenshot of FreeFixer's scan result.Hi, my name is Roger Karlsson. I've been running this website since 2006. I want to let you know about the FreeFixer program. FreeFixer is a freeware tool that analyzes your system and let you manually identify unwanted programs. Once you've identified some malware files, FreeFixer is pretty good at removing them. You can download FreeFixer here. It runs on Windows 2000/XP/2003/2008/2016/2019/Vista/7/8/8.1/10. Supports both 32- and 64-bit Windows.

If you have questions, feedback on FreeFixer or the freefixer.com website, need help analyzing FreeFixer's scan result or just want to say hello, please contact me. You can find my email address at the contact page.

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.

No comments posted yet.

Leave a reply