December 17, 2012, 8:27 AM — A new piece of malware that deletes entire partitions and user files from infected computers has been found in Iran, according to an alert issued Sunday by Maher, Iran's Computer Emergency Response Team Coordination Center (CERTCC).
Maher Center described the new threat as a targeted attack, but said that it has a simple design and is not similar to other sophisticated targeted attacks previously seen in the region. "Despite its simplicity in design, the malware is efficient and can wipe disk partitions and user profile directories without being recognized by anti-virus software," the center said in its advisory.
Several security companies have confirmed Maher's findings and said the threat is unsophisticated.
The malware is designed to delete all data from disk partitions identified with letters D to I, as well as files located on the desktop of the currently logged in user, security researchers from antivirus vendor Symantec said Monday in a blog post.
The malware initiates its data wiping routine on certain dates, the next one being Jan. 21 2013. However, the dates of Oct. 12, Nov. 12 and Dec. 12, 2012, were also found in the malware's configuration, suggesting that it may have been in distribution for at least two months.
The Maher Center said the malware's installer, also known as the dropper, is called GrooveMonitor.exe. That filename was likely chosen as a disguise because it is normally associated with a legitimate Microsoft Office 2007 document collaboration feature called Microsoft Office Groove.
According to an analysis of the new threat by researchers from security firm AlienVault, when the installer is executed, it adds a registry entry that ensure the malware's persistence across system reboots and creates a Windows batch file containing the data wiping routine.
Because of its use of batch files -- script files to be executed by the Windows shell program -- the malware has been dubbed "Batchwiper."
It's not clear how the malware is being distributed. The dropper could be deployed using several vectors, ranging from spearphishing emails, infected USB drives, some other malware already running on computers, or an internal actor uploading it to network shares, AlienVault Labs manager Jaime Blasco said via email.
Despite the fact that this malware is not sophisticated, if its wiping routines are executed, it can do a lot of damage, Blasco said.