What is RpcEpMap.dll?

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

RpcEpMap.dll's description is "RPC Endpoint Mapper"

RpcEpMap.dll is digitally signed by Microsoft Windows.

RpcEpMap.dll is usually located in the 'C:\Windows\System32\' folder.

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

PropertyValue
Product nameMicrosoft® Windows® Operating System
Company nameMicrosoft Corporation
File descriptionRPC Endpoint Mapper
Internal nameRpcEpMap.dll
Original filenameRpcEpMap.dll.mui
Legal copyright© Microsoft Corporation. All rights reserved.
Product version6.1.7600.16385
File version6.1.7600.16385 (win7_rtm.090713-1255)

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

Product nameMicrosoft® Windows® Operating System
Company nameMicrosoft Corporation
File descriptionRPC Endpoint Mapper
Internal nameRpcEpMap.dll
Original filenameRpcEpMap.dll.mui
Legal copyright© Microsoft Corporation. All rights..
Product version6.1.7600.16385
File version6.1.7600.16385 (win7_rtm.090713-1255)

Digital signatures [?]

RpcEpMap.dll has a valid digital signature.

PropertyValue
Signer nameMicrosoft Windows
Certificate issuer nameMicrosoft Windows Verification PCA
Certificate serial number6101c6c1000000000007

VirusTotal report

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

None of the 68 anti-virus programs detected the RpcEpMap.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\\665b5cd9fe905b0ee3f59a7b1a94760f5393ebee729877d8584349754c2867e8.bin.dll"
    ],
    "file_opened": [
        "C:\\Users\\cuck\\AppData\\Local\\Temp\\665b5cd9fe905b0ee3f59a7b1a94760f5393ebee729877d8584349754c2867e8.bin.dll"
    ],
    "command_line": [
        "\"C:\\Windows\\System32\\rundll32.exe\" C:\\Users\\cuck\\AppData\\Local\\Temp\\665b5cd9fe905b0ee3f59a7b1a94760f5393ebee729877d8584349754c2867e8.bin.dll,DllMain"
    ],
    "file_exists": [
        "C:\\Users\\cuck\\AppData\\Local\\Temp\\665b5cd9fe905b0ee3f59a7b1a94760f5393ebee729877d8584349754c2867e8.bin.dll.manifest",
        "C:\\Users\\cuck\\AppData\\Local\\Temp\\665b5cd9fe905b0ee3f59a7b1a94760f5393ebee729877d8584349754c2867e8.bin.dll"
    ],
    "file_read": [
        "C:\\Users\\cuck\\AppData\\Local\\Temp\\665b5cd9fe905b0ee3f59a7b1a94760f5393ebee729877d8584349754c2867e8.bin.dll"
    ],
    "regkey_read": [
        "HKEY_LOCAL_MACHINE\\SOFTWARE\\Microsoft\\Windows NT\\CurrentVersion\\GRE_Initialize\\DisableMetaFiles"
    ]
}

Generic

[
    {
        "process_path": "C:\\Windows\\System32\\rundll32.exe",
        "process_name": "rundll32.exe",
        "pid": 2968,
        "summary": {
            "file_exists": [
                "C:\\Users\\cuck\\AppData\\Local\\Temp\\665b5cd9fe905b0ee3f59a7b1a94760f5393ebee729877d8584349754c2867e8.bin.dll.manifest",
                "C:\\Users\\cuck\\AppData\\Local\\Temp\\665b5cd9fe905b0ee3f59a7b1a94760f5393ebee729877d8584349754c2867e8.bin.dll"
            ],
            "regkey_read": [
                "HKEY_LOCAL_MACHINE\\SOFTWARE\\Microsoft\\Windows NT\\CurrentVersion\\GRE_Initialize\\DisableMetaFiles"
            ],
            "dll_loaded": [
                "C:\\Users\\cuck\\AppData\\Local\\Temp\\665b5cd9fe905b0ee3f59a7b1a94760f5393ebee729877d8584349754c2867e8.bin.dll"
            ]
        },
        "first_seen": 1565848384.9375,
        "ppid": 2800
    },
    {
        "process_path": "C:\\Windows\\SysWOW64\\rundll32.exe",
        "process_name": "rundll32.exe",
        "pid": 2800,
        "summary": {
            "dll_loaded": [
                "C:\\Users\\cuck\\AppData\\Local\\Temp\\665b5cd9fe905b0ee3f59a7b1a94760f5393ebee729877d8584349754c2867e8.bin.dll"
            ],
            "file_opened": [
                "C:\\Users\\cuck\\AppData\\Local\\Temp\\665b5cd9fe905b0ee3f59a7b1a94760f5393ebee729877d8584349754c2867e8.bin.dll"
            ],
            "command_line": [
                "\"C:\\Windows\\System32\\rundll32.exe\" C:\\Users\\cuck\\AppData\\Local\\Temp\\665b5cd9fe905b0ee3f59a7b1a94760f5393ebee729877d8584349754c2867e8.bin.dll,DllMain"
            ],
            "file_exists": [
                "C:\\Users\\cuck\\AppData\\Local\\Temp\\665b5cd9fe905b0ee3f59a7b1a94760f5393ebee729877d8584349754c2867e8.bin.dll.manifest",
                "C:\\Users\\cuck\\AppData\\Local\\Temp\\665b5cd9fe905b0ee3f59a7b1a94760f5393ebee729877d8584349754c2867e8.bin.dll"
            ],
            "file_read": [
                "C:\\Users\\cuck\\AppData\\Local\\Temp\\665b5cd9fe905b0ee3f59a7b1a94760f5393ebee729877d8584349754c2867e8.bin.dll"
            ],
            "regkey_read": [
                "HKEY_LOCAL_MACHINE\\SOFTWARE\\Microsoft\\Windows NT\\CurrentVersion\\GRE_Initialize\\DisableMetaFiles"
            ]
        },
        "first_seen": 1565848384.7656,
        "ppid": 2924
    },
    {
        "process_path": "C:\\Windows\\System32\\lsass.exe",
        "process_name": "lsass.exe",
        "pid": 476,
        "summary": {},
        "first_seen": 1565848384.3438,
        "ppid": 376
    }
]

Signatures

[
    {
        "markcount": 1,
        "families": [],
        "description": "This executable has a PDB path",
        "severity": 1,
        "marks": [
            {
                "category": "pdb_path",
                "ioc": "RpcEpMap.pdb",
                "type": "ioc",
                "description": null
            }
        ],
        "references": [],
        "name": "has_pdb"
    },
    {
        "markcount": 2,
        "families": [],
        "description": "The file contains an unknown PE resource name possibly indicative of a packer",
        "severity": 1,
        "marks": [
            {
                "category": "resource name",
                "ioc": "MUI",
                "type": "ioc",
                "description": null
            },
            {
                "category": "resource name",
                "ioc": "WEVT_TEMPLATE",
                "type": "ioc",
                "description": null
            }
        ],
        "references": [],
        "name": "pe_unknown_resource_name"
    }
]

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": 3.0661208629608,
            "dport": 137,
            "sport": 137
        },
        {
            "src": "192.168.56.101",
            "dst": "224.0.0.252",
            "offset": 5074,
            "time": 3.0089528560638,
            "dport": 5355,
            "sport": 51001
        },
        {
            "src": "192.168.56.101",
            "dst": "224.0.0.252",
            "offset": 5402,
            "time": 1.0207188129425,
            "dport": 5355,
            "sport": 53595
        },
        {
            "src": "192.168.56.101",
            "dst": "224.0.0.252",
            "offset": 5730,
            "time": 3.0164330005646,
            "dport": 5355,
            "sport": 53848
        },
        {
            "src": "192.168.56.101",
            "dst": "224.0.0.252",
            "offset": 6058,
            "time": 1.5359170436859,
            "dport": 5355,
            "sport": 54255
        },
        {
            "src": "192.168.56.101",
            "dst": "224.0.0.252",
            "offset": 6386,
            "time": -0.099650144577026,
            "dport": 5355,
            "sport": 55314
        },
        {
            "src": "192.168.56.101",
            "dst": "239.255.255.250",
            "offset": 6714,
            "time": 1.5324609279633,
            "dport": 1900,
            "sport": 1900
        },
        {
            "src": "192.168.56.101",
            "dst": "239.255.255.250",
            "offset": 15396,
            "time": 1.0429079532623,
            "dport": 3702,
            "sport": 49152
        },
        {
            "src": "192.168.56.101",
            "dst": "239.255.255.250",
            "offset": 19588,
            "time": 3.133857011795,
            "dport": 1900,
            "sport": 53598
        }
    ],
    "dns_servers": [],
    "http": [],
    "icmp": [],
    "smtp": [],
    "tcp": [],
    "smtp_ex": [],
    "mitm": [],
    "hosts": [],
    "pcap_sha256": "d6081d067bbd3021f1e36445c7acf2396e272e8a090d12c00c752644532694d1",
    "dns": [],
    "http_ex": [],
    "domains": [],
    "dead_hosts": [],
    "sorted_pcap_sha256": "e9d6eb42faaa64f438c7b14a7d44d23cc62f300fc46729bf1d2ecec0f894c716",
    "irc": [],
    "https_ex": []
}

Screenshots

Screenshot from the sandboxScreenshot from the sandbox

TCP/UDP Listening Ports [?]

RpcEpMap.dll has been reported to listen on the following TCP/UDP ports.

PortProtocol# Occurrences
135TCP v41

Hashes [?]

PropertyValue
MD5e4dc58cf7b3ea515ae917ff0d402a7bb
SHA256665b5cd9fe905b0ee3f59a7b1a94760f5393ebee729877d8584349754c2867e8

What will you do with RpcEpMap.dll?

To help other users, please let us know what you will do with RpcEpMap.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


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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.

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