What is StartupCheckLibrary.dll?

StartupCheckLibrary.dll is part of Microsoft® Windows® Operating System and developed by Microsoft Corporation according to the StartupCheckLibrary.dll version information.

StartupCheckLibrary.dll's description is "Startup Check Library DLL"

StartupCheckLibrary.dll is usually located in the 'C:\Windows\SYSTEM32\' folder.

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

7 of the 66 anti-virus programs at VirusTotal detected the StartupCheckLibrary.dll file. That's a 11% detection rate.

Scanner	Detection Name
Kaspersky	Backdoor.Win32.Agent.mytobz
McAfee	Artemis!4B67F0ADA2E8
McAfee-GW-Edition	Artemis!Trojan
Microsoft	PUA:Win32/Presenoker
Rising	Backdoor.Agent!8.C5D (CLOUD)
Trapmine	suspicious.low.ml.score
ZoneAlarm	Backdoor.Win32.Agent.mytobz

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\\8e1260bbf43e54ef60672fc2efac525e961b5dee67146063aefcfda2d7161d89.bin.dll"
    ],
    "file_opened": [
        "C:\\Users\\cuck\\AppData\\Local\\Temp\\8e1260bbf43e54ef60672fc2efac525e961b5dee67146063aefcfda2d7161d89.bin.dll"
    ],
    "command_line": [
        "\"C:\\Windows\\System32\\rundll32.exe\" C:\\Users\\cuck\\AppData\\Local\\Temp\\8e1260bbf43e54ef60672fc2efac525e961b5dee67146063aefcfda2d7161d89.bin.dll,DllMain"
    ],
    "file_exists": [
        "C:\\Users\\cuck\\AppData\\Local\\Temp\\8e1260bbf43e54ef60672fc2efac525e961b5dee67146063aefcfda2d7161d89.bin.dll.manifest",
        "C:\\Users\\cuck\\AppData\\Local\\Temp\\8e1260bbf43e54ef60672fc2efac525e961b5dee67146063aefcfda2d7161d89.bin.dll"
    ],
    "file_read": [
        "C:\\Users\\cuck\\AppData\\Local\\Temp\\8e1260bbf43e54ef60672fc2efac525e961b5dee67146063aefcfda2d7161d89.bin.dll"
    ],
    "regkey_read": [
        "HKEY_LOCAL_MACHINE\\SOFTWARE\\Microsoft\\Windows NT\\CurrentVersion\\GRE_Initialize\\DisableMetaFiles",
        "HKEY_LOCAL_MACHINE\\SYSTEM\\ControlSet001\\services\\crypt32\\DebugHeapFlags"
    ]
}

Generic

[
    {
        "process_path": "C:\\Windows\\System32\\rundll32.exe",
        "process_name": "rundll32.exe",
        "pid": 2968,
        "summary": {
            "file_exists": [
                "C:\\Users\\cuck\\AppData\\Local\\Temp\\8e1260bbf43e54ef60672fc2efac525e961b5dee67146063aefcfda2d7161d89.bin.dll.manifest",
                "C:\\Users\\cuck\\AppData\\Local\\Temp\\8e1260bbf43e54ef60672fc2efac525e961b5dee67146063aefcfda2d7161d89.bin.dll"
            ],
            "regkey_read": [
                "HKEY_LOCAL_MACHINE\\SOFTWARE\\Microsoft\\Windows NT\\CurrentVersion\\GRE_Initialize\\DisableMetaFiles",
                "HKEY_LOCAL_MACHINE\\SYSTEM\\ControlSet001\\services\\crypt32\\DebugHeapFlags"
            ],
            "dll_loaded": [
                "C:\\Users\\cuck\\AppData\\Local\\Temp\\8e1260bbf43e54ef60672fc2efac525e961b5dee67146063aefcfda2d7161d89.bin.dll"
            ]
        },
        "first_seen": 1595998386.953125,
        "ppid": 1664
    },
    {
        "process_path": "C:\\Windows\\SysWOW64\\rundll32.exe",
        "process_name": "rundll32.exe",
        "pid": 1664,
        "summary": {
            "dll_loaded": [
                "C:\\Users\\cuck\\AppData\\Local\\Temp\\8e1260bbf43e54ef60672fc2efac525e961b5dee67146063aefcfda2d7161d89.bin.dll"
            ],
            "file_opened": [
                "C:\\Users\\cuck\\AppData\\Local\\Temp\\8e1260bbf43e54ef60672fc2efac525e961b5dee67146063aefcfda2d7161d89.bin.dll"
            ],
            "command_line": [
                "\"C:\\Windows\\System32\\rundll32.exe\" C:\\Users\\cuck\\AppData\\Local\\Temp\\8e1260bbf43e54ef60672fc2efac525e961b5dee67146063aefcfda2d7161d89.bin.dll,DllMain"
            ],
            "file_exists": [
                "C:\\Users\\cuck\\AppData\\Local\\Temp\\8e1260bbf43e54ef60672fc2efac525e961b5dee67146063aefcfda2d7161d89.bin.dll.manifest",
                "C:\\Users\\cuck\\AppData\\Local\\Temp\\8e1260bbf43e54ef60672fc2efac525e961b5dee67146063aefcfda2d7161d89.bin.dll"
            ],
            "file_read": [
                "C:\\Users\\cuck\\AppData\\Local\\Temp\\8e1260bbf43e54ef60672fc2efac525e961b5dee67146063aefcfda2d7161d89.bin.dll"
            ],
            "regkey_read": [
                "HKEY_LOCAL_MACHINE\\SOFTWARE\\Microsoft\\Windows NT\\CurrentVersion\\GRE_Initialize\\DisableMetaFiles"
            ]
        },
        "first_seen": 1595998386.703125,
        "ppid": 2456
    },
    {
        "process_path": "C:\\Windows\\System32\\lsass.exe",
        "process_name": "lsass.exe",
        "pid": 476,
        "summary": {},
        "first_seen": 1595998386.3125,
        "ppid": 376
    }
]

Signatures

[
    {
        "markcount": 2,
        "families": [],
        "description": "The binary likely contains encrypted or compressed data indicative of a packer",
        "severity": 2,
        "marks": [
            {
                "entropy": 7.905935246937499,
                "section": {
                    "size_of_data": "0x000a1600",
                    "virtual_address": "0x001cc000",
                    "entropy": 7.905935246937499,
                    "name": ".data",
                    "virtual_size": "0x000a6a44"
                },
                "type": "generic",
                "description": "A section with a high entropy has been found"
            },
            {
                "entropy": 0.2528397963180572,
                "type": "generic",
                "description": "Overall entropy of this PE file is high"
            }
        ],
        "references": [
            "http:\/\/www.forensickb.com\/2013\/03\/file-entropy-explained.html",
            "http:\/\/virii.es\/U\/Using%20Entropy%20Analysis%20to%20Find%20Encrypted%20and%20Packed%20Malware.pdf"
        ],
        "name": "packer_entropy"
    }
]

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": 6.1672539710998535,
            "dport": 137,
            "sport": 137
        },
        {
            "src": "192.168.56.101",
            "dst": "224.0.0.252",
            "offset": 5694,
            "time": 6.104001998901367,
            "dport": 5355,
            "sport": 51001
        },
        {
            "src": "192.168.56.101",
            "dst": "224.0.0.252",
            "offset": 6022,
            "time": 4.133376121520996,
            "dport": 5355,
            "sport": 53595
        },
        {
            "src": "192.168.56.101",
            "dst": "224.0.0.252",
            "offset": 6350,
            "time": 6.111670970916748,
            "dport": 5355,
            "sport": 53848
        },
        {
            "src": "192.168.56.101",
            "dst": "224.0.0.252",
            "offset": 6678,
            "time": 4.647969961166382,
            "dport": 5355,
            "sport": 54255
        },
        {
            "src": "192.168.56.101",
            "dst": "224.0.0.252",
            "offset": 7006,
            "time": 3.0129430294036865,
            "dport": 5355,
            "sport": 55314
        },
        {
            "src": "192.168.56.101",
            "dst": "239.255.255.250",
            "offset": 7334,
            "time": 4.64451003074646,
            "dport": 1900,
            "sport": 1900
        },
        {
            "src": "192.168.56.101",
            "dst": "239.255.255.250",
            "offset": 20274,
            "time": 4.154433965682983,
            "dport": 3702,
            "sport": 49152
        },
        {
            "src": "192.168.56.101",
            "dst": "239.255.255.250",
            "offset": 28658,
            "time": 6.237056016921997,
            "dport": 1900,
            "sport": 53598
        }
    ],
    "dns_servers": [],
    "http": [],
    "icmp": [],
    "smtp": [],
    "tcp": [],
    "smtp_ex": [],
    "mitm": [],
    "hosts": [],
    "pcap_sha256": "7c895d5e92a44979779d081f4b645bceae927280a0a853c170c86a37841186eb",
    "dns": [],
    "http_ex": [],
    "domains": [],
    "dead_hosts": [],
    "sorted_pcap_sha256": "ad61da964d427bfbf1affdfe2bd3793ae09b0b4b1e3ec1bacf6db4cae3ab9339",
    "irc": [],
    "https_ex": []
}

Screenshots

StartupCheckLibrary.dll removal instructions

The instructions below shows how to remove StartupCheckLibrary.dll with help from the FreeFixer removal tool. Basically, you install FreeFixer, scan your computer, check the StartupCheckLibrary.dll file for removal, restart your computer and scan it again to verify that StartupCheckLibrary.dll has been successfully removed. Here are the removal instructions in more detail:

1. Download and install FreeFixer: http://www.freefixer.com/download.html
2. Start FreeFixer and press the Start Scan button. The scan will finish in approximately five minutes.

   
3. When the scan is finished, locate StartupCheckLibrary.dll in the scan result and tick the checkbox next to the StartupCheckLibrary.dll file. Do not check any other file for removal unless you are 100% sure you want to delete it. Tip: Press CTRL-F to open up FreeFixer's search dialog to quickly locate StartupCheckLibrary.dll in the scan result.

   

   

   C:\Windows\SYSTEM32\StartupCheckLibrary.dll

   
4. Scroll down to the bottom of the scan result and press the Fix button. FreeFixer will now delete the StartupCheckLibrary.dll file.

   
5. Restart your computer.
6. Start FreeFixer and scan your computer again. If StartupCheckLibrary.dll still remains in the scan result, proceed with the next step. If StartupCheckLibrary.dll is gone from the scan result you're done.
7. If StartupCheckLibrary.dll still remains in the scan result, check its checkbox again in the scan result and click Fix.
8. Restart your computer.
9. Start FreeFixer and scan your computer again. Verify that StartupCheckLibrary.dll no longer appear in the scan result.

What did other users do?

The poll result listed below shows what users chose to do with the file. 58% have voted for removal. Based on votes from 64 users.

NOTE: Please do not use this poll as the only source of input to determine what you will do with the file.

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