What is RTCOMDLL.dll?

RTCOMDLL.dll is part of RTCOMDLL Module and developed by Realtek Semiconductor Corp. according to the RTCOMDLL.dll version information.

RTCOMDLL.dll's description is "RTCOMDLL Module"

RTCOMDLL.dll is digitally signed by Realtek Semiconductor Corp..

RTCOMDLL.dll is usually located in the 'c:\Windows\LastGood\SysWOW64\RTCOM\' folder.

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

PropertyValue
Product nameRTCOMDLL Module
Company nameRealtek Semiconductor Corp.
File descriptionRTCOMDLL Module
Internal nameRTCOMDLL
Original filenameRTCOMDLL.DLL
Legal copyrightCopyright (c) 2015 Realtek Semiconductor Corp. All rights reserved.
Product version2, 0, 0, 184
File version2, 0, 0, 184

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

Product nameRTCOMDLL Module
Company nameRealtek Semiconductor Corp.
File descriptionRTCOMDLL Module
Internal nameRTCOMDLL
Original filenameRTCOMDLL.DLL
Legal copyrightCopyright (c) 2015 Realtek Semicondu..
Product version2, 0, 0, 184
File version2, 0, 0, 184

Digital signatures [?]

RTCOMDLL.dll has a valid digital signature.

PropertyValue
Signer nameRealtek Semiconductor Corp.
Certificate issuer nameDigiCert EV Code Signing CA
Certificate serial number0320be3eb866526927f999b97b04346e

VirusTotal report

None of the 71 anti-virus programs at VirusTotal detected the RTCOMDLL.dll file.

None of the 71 anti-virus programs detected the RTCOMDLL.dll file.

Sandbox Report

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

Summary

Successfully executed process in sandbox.

Summary

{
    "file_exists": [
        "C:\\Users\\cuck\\AppData\\Local\\Temp\\6e7c8df795b4cb5acefb4baa5112c2b887a6d6b0e563d004c67350512b32a2a9.bin.dll",
        "C:\\Users\\cuck\\AppData\\Local\\Temp\\6e7c8df795b4cb5acefb4baa5112c2b887a6d6b0e563d004c67350512b32a2a9.bin.dll.manifest"
    ],
    "file_recreated": [
        "\\Device\\KsecDD"
    ],
    "regkey_read": [
        "HKEY_LOCAL_MACHINE\\SOFTWARE\\Microsoft\\Windows NT\\CurrentVersion\\GRE_Initialize\\DisableMetaFiles",
        "HKEY_LOCAL_MACHINE\\SYSTEM\\ControlSet001\\Control\\Nls\\CustomLocale\\en",
        "HKEY_LOCAL_MACHINE\\SYSTEM\\ControlSet001\\Control\\Nls\\ExtendedLocale\\en"
    ],
    "dll_loaded": [
        "ADVAPI32.dll",
        "C:\\Users\\cuck\\AppData\\Local\\Temp\\6e7c8df795b4cb5acefb4baa5112c2b887a6d6b0e563d004c67350512b32a2a9.bin.dll",
        "C:\\Users\\cuck\\AppData\\Local\\Temp\\6e7c8df795b4cb5acefb4baa5112c2b887a6d6b0e563d004c67350512b32a2a9.binLOC.dll",
        "C:\\Users\\cuck\\AppData\\Local\\Temp\\6e7c8df795b4cb5acefb4baa5112c2b887a6d6b0e563d004c67350512b32a2a9.binENU.dll"
    ]
}

Generic

[
    {
        "process_path": "C:\\Windows\\System32\\lsass.exe",
        "process_name": "lsass.exe",
        "pid": 476,
        "summary": {},
        "first_seen": 1586152385.328125,
        "ppid": 376
    },
    {
        "process_path": "C:\\Windows\\SysWOW64\\rundll32.exe",
        "process_name": "rundll32.exe",
        "pid": 2660,
        "summary": {
            "file_exists": [
                "C:\\Users\\cuck\\AppData\\Local\\Temp\\6e7c8df795b4cb5acefb4baa5112c2b887a6d6b0e563d004c67350512b32a2a9.bin.dll",
                "C:\\Users\\cuck\\AppData\\Local\\Temp\\6e7c8df795b4cb5acefb4baa5112c2b887a6d6b0e563d004c67350512b32a2a9.bin.dll.manifest"
            ],
            "file_recreated": [
                "\\Device\\KsecDD"
            ],
            "regkey_read": [
                "HKEY_LOCAL_MACHINE\\SOFTWARE\\Microsoft\\Windows NT\\CurrentVersion\\GRE_Initialize\\DisableMetaFiles",
                "HKEY_LOCAL_MACHINE\\SYSTEM\\ControlSet001\\Control\\Nls\\CustomLocale\\en",
                "HKEY_LOCAL_MACHINE\\SYSTEM\\ControlSet001\\Control\\Nls\\ExtendedLocale\\en"
            ],
            "dll_loaded": [
                "ADVAPI32.dll",
                "C:\\Users\\cuck\\AppData\\Local\\Temp\\6e7c8df795b4cb5acefb4baa5112c2b887a6d6b0e563d004c67350512b32a2a9.bin.dll",
                "C:\\Users\\cuck\\AppData\\Local\\Temp\\6e7c8df795b4cb5acefb4baa5112c2b887a6d6b0e563d004c67350512b32a2a9.binLOC.dll",
                "C:\\Users\\cuck\\AppData\\Local\\Temp\\6e7c8df795b4cb5acefb4baa5112c2b887a6d6b0e563d004c67350512b32a2a9.binENU.dll"
            ]
        },
        "first_seen": 1586152385.578125,
        "ppid": 3040
    }
]

Signatures

[
    {
        "markcount": 3,
        "families": [],
        "description": "The file contains an unknown PE resource name possibly indicative of a packer",
        "severity": 1,
        "marks": [
            {
                "category": "resource name",
                "ioc": "AP",
                "type": "ioc",
                "description": null
            },
            {
                "category": "resource name",
                "ioc": "REGISTRY",
                "type": "ioc",
                "description": null
            },
            {
                "category": "resource name",
                "ioc": "TYPELIB",
                "type": "ioc",
                "description": null
            }
        ],
        "references": [],
        "name": "pe_unknown_resource_name"
    },
    {
        "markcount": 7,
        "families": [],
        "description": "Allocates read-write-execute memory (usually to unpack itself)",
        "severity": 2,
        "marks": [
            {
                "call": {
                    "category": "process",
                    "status": 1,
                    "stacktrace": [],
                    "api": "NtProtectVirtualMemory",
                    "return_value": 0,
                    "arguments": {
                        "process_identifier": 2660,
                        "stack_dep_bypass": 0,
                        "stack_pivoted": 0,
                        "heap_dep_bypass": 0,
                        "length": 4096,
                        "protection": 64,
                        "process_handle": "0xffffffff",
                        "base_address": "0x10070000"
                    },
                    "time": 1586152385.656125,
                    "tid": 2308,
                    "flags": {
                        "protection": "PAGE_EXECUTE_READWRITE"
                    }
                },
                "pid": 2660,
                "type": "call",
                "cid": 10
            },
            {
                "call": {
                    "category": "process",
                    "status": 1,
                    "stacktrace": [],
                    "api": "NtProtectVirtualMemory",
                    "return_value": 0,
                    "arguments": {
                        "process_identifier": 2660,
                        "stack_dep_bypass": 0,
                        "stack_pivoted": 0,
                        "heap_dep_bypass": 0,
                        "length": 4096,
                        "protection": 64,
                        "process_handle": "0xffffffff",
                        "base_address": "0x773d1000"
                    },
                    "time": 1586152385.656125,
                    "tid": 2308,
                    "flags": {
                        "protection": "PAGE_EXECUTE_READWRITE"
                    }
                },
                "pid": 2660,
                "type": "call",
                "cid": 12
            },
            {
                "call": {
                    "category": "process",
                    "status": 1,
                    "stacktrace": [],
                    "api": "NtProtectVirtualMemory",
                    "return_value": 0,
                    "arguments": {
                        "process_identifier": 2660,
                        "stack_dep_bypass": 0,
                        "stack_pivoted": 0,
                        "heap_dep_bypass": 0,
                        "length": 4096,
                        "protection": 64,
                        "process_handle": "0xffffffff",
                        "base_address": "0x759c1000"
                    },
                    "time": 1586152385.656125,
                    "tid": 2308,
                    "flags": {
                        "protection": "PAGE_EXECUTE_READWRITE"
                    }
                },
                "pid": 2660,
                "type": "call",
                "cid": 14
            },
            {
                "call": {
                    "category": "process",
                    "status": 1,
                    "stacktrace": [],
                    "api": "NtProtectVirtualMemory",
                    "return_value": 0,
                    "arguments": {
                        "process_identifier": 2660,
                        "stack_dep_bypass": 0,
                        "stack_pivoted": 0,
                        "heap_dep_bypass": 0,
                        "length": 4096,
                        "protection": 64,
                        "process_handle": "0xffffffff",
                        "base_address": "0x765e1000"
                    },
                    "time": 1586152385.656125,
                    "tid": 2308,
                    "flags": {
                        "protection": "PAGE_EXECUTE_READWRITE"
                    }
                },
                "pid": 2660,
                "type": "call",
                "cid": 16
            },
            {
                "call": {
                    "category": "process",
                    "status": 1,
                    "stacktrace": [],
                    "api": "NtProtectVirtualMemory",
                    "return_value": 0,
                    "arguments": {
                        "process_identifier": 2660,
                        "stack_dep_bypass": 0,
                        "stack_pivoted": 0,
                        "heap_dep_bypass": 0,
                        "length": 4096,
                        "protection": 64,
                        "process_handle": "0xffffffff",
                        "base_address": "0x74f21000"
                    },
                    "time": 1586152385.656125,
                    "tid": 2308,
                    "flags": {
                        "protection": "PAGE_EXECUTE_READWRITE"
                    }
                },
                "pid": 2660,
                "type": "call",
                "cid": 18
            },
            {
                "call": {
                    "category": "process",
                    "status": 1,
                    "stacktrace": [],
                    "api": "NtProtectVirtualMemory",
                    "return_value": 0,
                    "arguments": {
                        "process_identifier": 2660,
                        "stack_dep_bypass": 0,
                        "stack_pivoted": 0,
                        "heap_dep_bypass": 0,
                        "length": 4096,
                        "protection": 64,
                        "process_handle": "0xffffffff",
                        "base_address": "0x74e21000"
                    },
                    "time": 1586152385.656125,
                    "tid": 2308,
                    "flags": {
                        "protection": "PAGE_EXECUTE_READWRITE"
                    }
                },
                "pid": 2660,
                "type": "call",
                "cid": 20
            },
            {
                "call": {
                    "category": "process",
                    "status": 1,
                    "stacktrace": [],
                    "api": "NtProtectVirtualMemory",
                    "return_value": 0,
                    "arguments": {
                        "process_identifier": 2660,
                        "stack_dep_bypass": 0,
                        "stack_pivoted": 0,
                        "heap_dep_bypass": 0,
                        "length": 4096,
                        "protection": 64,
                        "process_handle": "0xffffffff",
                        "base_address": "0x75091000"
                    },
                    "time": 1586152385.656125,
                    "tid": 2308,
                    "flags": {
                        "protection": "PAGE_EXECUTE_READWRITE"
                    }
                },
                "pid": 2660,
                "type": "call",
                "cid": 22
            }
        ],
        "references": [],
        "name": "allocates_rwx"
    },
    {
        "markcount": 6,
        "families": [],
        "description": "Foreign language identified in PE resource",
        "severity": 2,
        "marks": [
            {
                "name": "AP",
                "language": "LANG_CHINESE",
                "offset": "0x0009acc0",
                "filetype": "PE32+ executable (GUI) x86-64, for MS Windows",
                "sublanguage": "SUBLANG_CHINESE_TRADITIONAL",
                "type": "generic",
                "size": "0x0006f800"
            },
            {
                "name": "REGISTRY",
                "language": "LANG_CHINESE",
                "offset": "0x0009aa10",
                "filetype": "ASCII text, with CRLF line terminators",
                "sublanguage": "SUBLANG_CHINESE_TRADITIONAL",
                "type": "generic",
                "size": "0x000002ab"
            },
            {
                "name": "REGISTRY",
                "language": "LANG_CHINESE",
                "offset": "0x0009aa10",
                "filetype": "ASCII text, with CRLF line terminators",
                "sublanguage": "SUBLANG_CHINESE_TRADITIONAL",
                "type": "generic",
                "size": "0x000002ab"
            },
            {
                "name": "REGISTRY",
                "language": "LANG_CHINESE",
                "offset": "0x0009aa10",
                "filetype": "ASCII text, with CRLF line terminators",
                "sublanguage": "SUBLANG_CHINESE_TRADITIONAL",
                "type": "generic",
                "size": "0x000002ab"
            },
            {
                "name": "REGISTRY",
                "language": "LANG_CHINESE",
                "offset": "0x0009aa10",
                "filetype": "ASCII text, with CRLF line terminators",
                "sublanguage": "SUBLANG_CHINESE_TRADITIONAL",
                "type": "generic",
                "size": "0x000002ab"
            },
            {
                "name": "REGISTRY",
                "language": "LANG_CHINESE",
                "offset": "0x0009aa10",
                "filetype": "ASCII text, with CRLF line terminators",
                "sublanguage": "SUBLANG_CHINESE_TRADITIONAL",
                "type": "generic",
                "size": "0x000002ab"
            }
        ],
        "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": 546,
            "time": 3.0755600929260254,
            "dport": 137,
            "sport": 137
        },
        {
            "src": "192.168.56.101",
            "dst": "224.0.0.252",
            "offset": 5074,
            "time": 3.0211219787597656,
            "dport": 5355,
            "sport": 51001
        },
        {
            "src": "192.168.56.101",
            "dst": "224.0.0.252",
            "offset": 5402,
            "time": 1.0785350799560547,
            "dport": 5355,
            "sport": 53595
        },
        {
            "src": "192.168.56.101",
            "dst": "224.0.0.252",
            "offset": 5730,
            "time": 3.0299320220947266,
            "dport": 5355,
            "sport": 53848
        },
        {
            "src": "192.168.56.101",
            "dst": "224.0.0.252",
            "offset": 6058,
            "time": 1.6988680362701416,
            "dport": 5355,
            "sport": 54255
        },
        {
            "src": "192.168.56.101",
            "dst": "224.0.0.252",
            "offset": 6386,
            "time": -0.08540010452270508,
            "dport": 5355,
            "sport": 55314
        },
        {
            "src": "192.168.56.101",
            "dst": "239.255.255.250",
            "offset": 6714,
            "time": 1.158257007598877,
            "dport": 1900,
            "sport": 1900
        },
        {
            "src": "192.168.56.101",
            "dst": "239.255.255.250",
            "offset": 18562,
            "time": 1.109710931777954,
            "dport": 3702,
            "sport": 49152
        },
        {
            "src": "192.168.56.101",
            "dst": "239.255.255.250",
            "offset": 26946,
            "time": 3.1260390281677246,
            "dport": 1900,
            "sport": 53598
        }
    ],
    "dns_servers": [],
    "http": [],
    "icmp": [],
    "smtp": [],
    "tcp": [],
    "smtp_ex": [],
    "mitm": [],
    "hosts": [],
    "pcap_sha256": "988730fe885ff05e63543e6f34c68888a7c1762c56d5ec30e1838523f4c78dc5",
    "dns": [],
    "http_ex": [],
    "domains": [],
    "dead_hosts": [],
    "sorted_pcap_sha256": "289b7b737ecee292f9d4316155cb8472d9513326783c973085a80b8939a71575",
    "irc": [],
    "https_ex": []
}

Screenshots

Screenshot from the sandboxScreenshot from the sandbox

Hashes [?]

PropertyValue
MD52541deb044009d98dbefcbf9c05c7a78
SHA2566e7c8df795b4cb5acefb4baa5112c2b887a6d6b0e563d004c67350512b32a2a9

What will you do with RTCOMDLL.dll?

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



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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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