Home Malware Programs Backdoors BKDR_BRIBA.EVL


Posted: August 17, 2012

Threat Metric

Threat Level: 2/10
Infected PCs: 22
First Seen: August 17, 2012
OS(es) Affected: Windows

BKDR_BRIBA.EVL is a backdoor Trojan that connects to a (currently disabled) C&C server to download and execute other malicious files. Typical BKDR_BRIBA.EVL attacks involve its installation via a Trojan dropper, TROJ_MDROP.EVL, which is distributed by e-mail spam. Because the installation process for BKDR_BRIBA.EVL exploits Flash vulnerabilities, SpywareRemove.com malware researchers especially encourage potential victims of attacks to update Adobe Flash Player as required to close vulnerabilities that could be used to install BKDR_BRIBA.EVL and similar PC threats without any form of permission. If you do need to remove BKDR_BRIBA.EVL from your computer, BKDR_BRIBA.EVL's deletion should be undertaken by anti-malware software that's designed to delete Trojans like BKDR_BRIBA.EVL that will resist usual removal methods.

How BKDR_BRIBA.EVL Hitches a Ride on Flash to Your Doorstep

BKDR_BRIBA.EVL is installed by TROJ_MDROP.EVL, a Trojan dropper that may appear to be a Word document. However, in spite of its ostensible file type, TROJ_MDROP.EVL contains hidden SWF content that's designed to exploit the Flash vulnerability CVE-2012-1535. If you're using Flash Player versions older than 11.3.300.271 for Windows/OS X or for Linux, your PC can be affected by TROJ_MDROP.EVL's attack, which installs BKDR_BRIBA.EVL without your permission. Besides keeping Flash updated, SpywareRemove.com malware analysts also note that Android platforms and platforms without Flash are safe from this means of BKDR_BRIBA.EVL installation.

BKDR_BRIBA.EVL and TROJ_MDROP.EVL are distributed through spam e-mail messages that include TROJ_MDROP.EVL as a file attachment. Although TROJ_MDROP.EVL can't install BKDR_BRIBA.EVL without, itself, being launched, typical spam attacks will attempt to mislead victims into believing that these file attachments are benign or harmless. Due to this continuance of e-mail attachment-related attacks, SpywareRemove.com malware researchers encourage you to use anti-malware tools to scan files before you download or open them.

The Half-Functional Nature of a BKDR_BRIBA.EVL Infection

BKDR_BRIBA.EVL, while definitively malicious due to its attempt to contact remote servers and download other files without any permission, isn't quite as harmful to your PC as BKDR_BRIBA.EVL might be under other circumstances. Current reports by SpywareRemove.com malware researchers note that BKDR_BRIBA.EVL's C&C server isn't functional, which is hopefully indicative of the authorities having shut down the BKDR_BRIBA.EVL operation before BKDR_BRIBA.EVL could become widely-distributed to vulnerable PCs.

However, future variants of BKDR_BRIBA.EVL are likely to use different servers, and BKDR_BRIBA.EVL infections should always be removed, regardless, as a matter of standardized PC safety. BKDR_BRIBA.EVL injects itself into other memory processes and may intervene with the accomplishment or stability of your PC until you delete BKDR_BRIBA.EVL with a suitable anti-malware application.

If you need to disable BKDR_BRIBA.EVL for its complete removal, SpywareRemove.com malware analysts have found booting Windows from a removable USB drive to be useful for dodging the startup methods of BKDR_BRIBA.EVL and similar Trojans. BKDR_BRIBA.EVL's aliases include Win32/Briba.AA Trojan, Trojan.Win32.Generic!BT, Gen:Variant.Barys.984, Backdoor:Win32/Briba.A, Backdoor.Briba, Backdoor.Win32.Briba, Mal/Behav-116 and W32/Briba.AA.

Use SpyHunter to Detect and Remove PC Threats

If you are concerned that malware or PC threats similar to BKDR_BRIBA.EVL may have infected your computer, we recommend you start an in-depth system scan with SpyHunter. SpyHunter is an advanced malware protection and remediation application that offers subscribers a comprehensive method for protecting PCs from malware, in addition to providing one-on-one technical support service.

Download SpyHunter's Malware Scanner

Note: SpyHunter's free version is only for malware detection. If SpyHunter detects malware on your PC, you will need to purchase SpyHunter's malware tool to remove the malware threats. Learn more on SpyHunter. If you would like to uninstall SpyHunter for any reason, please follow these uninstall instructions. To learn more about our policies and practices, visit our EULA, Privacy Policy and Threat Assessment Criteria .

Why can't I open any program including SpyHunter? You may have a malware file running in memory that kills any programs that you try to launch on your PC. Tip: Download SpyHunter from a clean computer, copy it to a USB thumb drive, DVD or CD, then install it on the infected PC and run SpyHunter's malware scanner.

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:

%User Profile%\Application Data\taskman.dll File name: %User Profile%\Application Data\taskman.dll
File type: Dynamic link library
Mime Type: unknown/dll
Group: Malware file

Registry Modifications

The following newly produced Registry Values are:

HKEY..\..\{Value}HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run rundll32.exe = "%User Profile%\Application Data\taskman.dll, start"