Backdoor.Orcus

Posted: July 6, 2016

Threat Metric

The Threat Meter is a malware assessment that SpywareRemove.com's research team is able to give every identifiable malware threat. Our Threat Meter includes several criteria based off of specific malware threats to value their severity, reach and volume. The Threat Meter is able to give you a numerical breakdown of each threat's initial Threat Level, Detection Count, Volume Count, Trend Path and Percentage Impact. The overall ranking of each threat in the Threat Meter is a basic breakdown of how all threats are ranked within our own extensive malware database. The scoring for each specific malware threat can be easily compared to other emerging threats to draw a contrast in its particular severity. The Threat Meter is a useful tool in the endeavor of seeking a solution to remove a threat or pursue additional analytical research for all types of computer users.

The following fields listed on the Threat Meter containing a specific value, are explained in detail below:

Threat Level: The threat level scale goes from 1 to 10 where 10 is the highest level of severity and 1 is the lowest level of severity. Each specific level is relative to the threat's consistent assessed behaviors collected from SpyHunter's risk assessment model.

Detection Count: The collective number of confirmed and suspected cases of a particular malware threat. The detection count is calculated from infected PCs retrieved from diagnostic and scan log reports generated by SpyHunter.

Volume Count: Similar to the detection count, the Volume Count is specifically based on the number of confirmed and suspected threats infecting systems on a daily basis. High volume counts usually represent a popular threat but may or may not have infected a large number of systems. High detection count threats could lay dormant and have a low volume count. Criteria for Volume Count is relative to a daily detection count.

Trend Path: The Trend Path, utilizing an up arrow, down arrow or equal symbol, represents the level of recent movement of a particular threat. Up arrows represent an increase, down arrows represent a decline and the equal symbol represent no change to a threat's recent movement.

% Impact (Last 7 Days): This demonstrates a 7-day period change in the frequency of a malware threat infecting PCs. The percentage impact correlates directly to the current Trend Path to determine a rise or decline in the percentage.

Ranking:	3,759
Threat Level:	6/10
Infected PCs:	9,099

First Seen:	July 6, 2016
Last Seen:	October 17, 2023
OS(es) Affected:	Windows

Backdoor.MoSucker, a backdoor Trojan also known as Backdoor.Orcus, possesses a long list of features, which are likely to be used to drop out sensitive data from the compromised computer, as well as annoy the unfortunate victim. This threat has been active for many years, and it is still being used to mess with computers that are not secured by a trustworthy anti-virus software suite. Older threats like Backdoor.MoSucker are detected by just about any anti-malware product, and we strongly recommended that you take the required measures to ensure that your computer is protected sufficiently.

If there is nothing in place to stop Backdoor.MoSucker's attack, then this threat might plant its files in various system folde swiftly and then modify the Windows Registry to gain persistence. After this, the remote attacker can perform a broad range of actions on the compromised computer such as:

Display fake notifications and alerts.
Trigger system events.
Log keystrokes and actions.
Get the properties of the files found on the remote PC.
Display fake Windows errors.
Extend Backdoor.MoSucker's functionality by adding additional plug-ins.

Since Backdoor.MoSucker is meant to be stealthy and uses random files and directories to execute its attack, it is very difficult to identify and remove the corrupted files linked to this threat manually. Security researchers recommend using a trustworthy anti-malware application to ensure that threats like Backdoor.MoSucker aren't present on your PC, as well as keep your machine protected in the future.

Technical Details

File System Modifications

Tutorials: If you wish to learn how to remove malware components manually, you can read the tutorials on how to find malware, kill unwanted processes, remove malicious DLLs and delete other harmful files. Always be sure to back up your PC before making any changes.

The following files were created in the system:

file.exe

File name: file.exe
Size: 2.33 MB (2338640 bytes)
MD5: 956098914ea294ef80ed87da2dae7eda
Detection count: 70
File type: Executable File
Mime Type: unknown/exe
Group: Malware file
Last Updated: November 22, 2016

Registry Modifications

The following newly produced Registry Values are:

Regexp file mask%APPDATA%\.orcusInstallation%APPDATA%\Orcus\Microsoft\DriverManager.exe%WinDir%\System32\Tasks\Orcus Respawner

Additional Information

The following directories were created:

%APPDATA%\Orcus%PROGRAMFILES%\os%PROGRAMFILES(x86)%\os