Virus Profile: RDN/DNSChanger.bfr!8DD182910997

Threat Search
Virus Profile information details
Risk Assessment: Home Low | Corporate Low
Date Discovered: 1/14/2014
Date Added: 1/14/2014
Origin: Unknown
Length: 1531904
Type: Trojan
Subtype: -
DAT Required: 7317
Removal Instructions


This is a Trojan detection. Unlike viruses, Trojans do not self-replicate. They are spread manually, often under the premise that they are beneficial or wanted. The most common installation methods involve system or security exploitation, and unsuspecting users manually executing unknown programs. Distribution channels include e-mail, malicious or hacked Web pages, Internet Relay Chat (IRC), peer-to-peer networks, etc.

Indication of Infection

This symptoms of this detection are the files, registry, and network communication referenced in the characteristics section.

Methods of Infection

Trojans do not self-replicate. They are spread manually, often under the premise that the executable is something beneficial. Distribution channels include IRC, peer-to-peer networks, newsgroup postings, e-mail, etc.


Virus Characteristics

This is a Trojan

File PropertiesProperty Values
McAfee DetectionRDN/DNSChanger.bfr
Length1531904 bytes

Other Common Detection Aliases

Company NamesDetection Names

Other brands and names may be claimed as the property of others.

ActivitiesRisk Levels
Attempts to modify the hosts file. This could be used to map hostnames different IP addresses redirecting traffic to an alternate location.High
Uses the Ipconfig commandMedium
Adds a component to or modifies the network stack.Medium
Enumerates many system files and directories.Low
Enumerates process listLow
Attempts to send data or commands via HTTPLow
Process attempts to call itself recursivelyLow
Adds or modifies Internet Explorer cookiesLow
No digital signature is presentInformational

McAfee ScansScan Detections
McAfee BetaRDN/DNSChanger.bfr
McAfee SupportedRDN/DNSChanger.bfr

System Changes

Some path values have been replaced with environment variables as the exact location may vary with different configurations.
%WINDIR% = \WINDOWS (Windows 9x/ME/XP/Vista/7), \WINNT (Windows NT/2000)
%PROGRAMFILES% = \Program Files

The following files were analyzed:


The following files have been added to the system:

  • %TEMP%\BC89E2593E.tmp
  • %WINDIR%\SYSTEM32\drivers\etc\hosts.txt

The following files have been changed:

  • C:\

The following files were temporarily written to disk then later removed:

  • %WINDIR%\SYSTEM32\drivers\etc\hosts
  • %TEMP%\11324.sys

The following registry elements have been created:


The following registry elements have been changed:


The applications attempted the following network connection(s):

  • 91.121.12.***:80
  • 65.98.83.***:80
  • hxxp://
  • 74.82.216.*:80


Please use the following instructions for all supported versions of Windows:

1. Disable Windows System Restore. For instructions, please refer to:

2. Update your McAfee Anti-Virus product to the latest version (when possible), and ensure the latest DAT and Engine and any applicable EXTRA.DATs are installed.

3. Run a full system scan. (On-Demand Scan)

4. Reboot, as soon as it is convenient, to ensure all malicious components are removed.


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