What is esu.dll?

esu.dll is part of IMI Kurwica ESU Bypass Suite and developed by IMI Kurwica according to the esu.dll version information.

esu.dll's description is "IMI Kurwica SLC for ESU"

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

None of the anti-virus scanners at VirusTotal reports anything malicious about esu.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 esu.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\\a7b61b447bdc60dc9d962520f380db87a938b1997aac73d9f830ae0893e67247.bin.dll"
    ],
    "file_opened": [
        "C:\\Users\\cuck\\AppData\\Local\\Temp\\a7b61b447bdc60dc9d962520f380db87a938b1997aac73d9f830ae0893e67247.bin.dll"
    ],
    "command_line": [
        "\"C:\\Windows\\System32\\rundll32.exe\" C:\\Users\\cuck\\AppData\\Local\\Temp\\a7b61b447bdc60dc9d962520f380db87a938b1997aac73d9f830ae0893e67247.bin.dll,DllMain"
    ],
    "file_exists": [
        "C:\\Users\\cuck\\AppData\\Local\\Temp\\a7b61b447bdc60dc9d962520f380db87a938b1997aac73d9f830ae0893e67247.bin.dll",
        "C:\\Users\\cuck\\AppData\\Local\\Temp\\a7b61b447bdc60dc9d962520f380db87a938b1997aac73d9f830ae0893e67247.bin.dll.manifest"
    ],
    "file_read": [
        "C:\\Users\\cuck\\AppData\\Local\\Temp\\a7b61b447bdc60dc9d962520f380db87a938b1997aac73d9f830ae0893e67247.bin.dll"
    ],
    "regkey_read": [
        "HKEY_LOCAL_MACHINE\\SOFTWARE\\Microsoft\\Windows NT\\CurrentVersion\\GRE_Initialize\\DisableMetaFiles"
    ]
}

Generic

[
    {
        "process_path": "C:\\Windows\\SysWOW64\\rundll32.exe",
        "process_name": "rundll32.exe",
        "pid": 2816,
        "summary": {
            "dll_loaded": [
                "C:\\Users\\cuck\\AppData\\Local\\Temp\\a7b61b447bdc60dc9d962520f380db87a938b1997aac73d9f830ae0893e67247.bin.dll"
            ],
            "file_opened": [
                "C:\\Users\\cuck\\AppData\\Local\\Temp\\a7b61b447bdc60dc9d962520f380db87a938b1997aac73d9f830ae0893e67247.bin.dll"
            ],
            "command_line": [
                "\"C:\\Windows\\System32\\rundll32.exe\" C:\\Users\\cuck\\AppData\\Local\\Temp\\a7b61b447bdc60dc9d962520f380db87a938b1997aac73d9f830ae0893e67247.bin.dll,DllMain"
            ],
            "file_exists": [
                "C:\\Users\\cuck\\AppData\\Local\\Temp\\a7b61b447bdc60dc9d962520f380db87a938b1997aac73d9f830ae0893e67247.bin.dll",
                "C:\\Users\\cuck\\AppData\\Local\\Temp\\a7b61b447bdc60dc9d962520f380db87a938b1997aac73d9f830ae0893e67247.bin.dll.manifest"
            ],
            "file_read": [
                "C:\\Users\\cuck\\AppData\\Local\\Temp\\a7b61b447bdc60dc9d962520f380db87a938b1997aac73d9f830ae0893e67247.bin.dll"
            ],
            "regkey_read": [
                "HKEY_LOCAL_MACHINE\\SOFTWARE\\Microsoft\\Windows NT\\CurrentVersion\\GRE_Initialize\\DisableMetaFiles"
            ]
        },
        "first_seen": 1593561185.6875,
        "ppid": 2016
    },
    {
        "process_path": "C:\\Windows\\System32\\lsass.exe",
        "process_name": "lsass.exe",
        "pid": 476,
        "summary": {},
        "first_seen": 1593561185.34375,
        "ppid": 376
    },
    {
        "process_path": "C:\\Windows\\System32\\rundll32.exe",
        "process_name": "rundll32.exe",
        "pid": 2588,
        "summary": {
            "file_exists": [
                "C:\\Users\\cuck\\AppData\\Local\\Temp\\a7b61b447bdc60dc9d962520f380db87a938b1997aac73d9f830ae0893e67247.bin.dll",
                "C:\\Users\\cuck\\AppData\\Local\\Temp\\a7b61b447bdc60dc9d962520f380db87a938b1997aac73d9f830ae0893e67247.bin.dll.manifest"
            ],
            "regkey_read": [
                "HKEY_LOCAL_MACHINE\\SOFTWARE\\Microsoft\\Windows NT\\CurrentVersion\\GRE_Initialize\\DisableMetaFiles"
            ],
            "dll_loaded": [
                "C:\\Users\\cuck\\AppData\\Local\\Temp\\a7b61b447bdc60dc9d962520f380db87a938b1997aac73d9f830ae0893e67247.bin.dll"
            ]
        },
        "first_seen": 1593561185.875,
        "ppid": 2816
    }
]

Signatures

[]

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": 3.076617956161499,
            "dport": 137,
            "sport": 137
        },
        {
            "src": "192.168.56.101",
            "dst": "224.0.0.252",
            "offset": 4318,
            "time": 3.0118751525878906,
            "dport": 5355,
            "sport": 51001
        },
        {
            "src": "192.168.56.101",
            "dst": "224.0.0.252",
            "offset": 4646,
            "time": 1.0776581764221191,
            "dport": 5355,
            "sport": 53595
        },
        {
            "src": "192.168.56.101",
            "dst": "224.0.0.252",
            "offset": 4974,
            "time": 3.019031047821045,
            "dport": 5355,
            "sport": 53848
        },
        {
            "src": "192.168.56.101",
            "dst": "224.0.0.252",
            "offset": 5302,
            "time": 1.5965871810913086,
            "dport": 5355,
            "sport": 54255
        },
        {
            "src": "192.168.56.101",
            "dst": "224.0.0.252",
            "offset": 5630,
            "time": -0.08773684501647949,
            "dport": 5355,
            "sport": 55314
        },
        {
            "src": "192.168.56.101",
            "dst": "239.255.255.250",
            "offset": 5958,
            "time": 1.6124091148376465,
            "dport": 1900,
            "sport": 1900
        },
        {
            "src": "192.168.56.101",
            "dst": "239.255.255.250",
            "offset": 14640,
            "time": 1.123258113861084,
            "dport": 3702,
            "sport": 49152
        },
        {
            "src": "192.168.56.101",
            "dst": "239.255.255.250",
            "offset": 18832,
            "time": 3.122277021408081,
            "dport": 1900,
            "sport": 53598
        }
    ],
    "dns_servers": [],
    "http": [],
    "icmp": [],
    "smtp": [],
    "tcp": [],
    "smtp_ex": [],
    "mitm": [],
    "hosts": [],
    "pcap_sha256": "d0ea3ed0809f2dfb8db887e17d8c8bf0dd0938c5632f6594b434a27b5dca3627",
    "dns": [],
    "http_ex": [],
    "domains": [],
    "dead_hosts": [],
    "sorted_pcap_sha256": "9710d9f51ace1e807c664b9bb44027a70306ea3fef0415abe9deff7d14d6515e",
    "irc": [],
    "https_ex": []
}

Screenshots

Filename variants

esu.dll may also use other filenames. The most common variants are listed below:

• sle.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.

And now some shameless self promotion ;)

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.

• Privacy Policy