Compression File Formats of the past Come Haunting in Spam Campaigns

guest · Oct 30, 2018

Compression File Formats of the past Come Haunting in Spam Campaigns
October 30, 2018
https://www.bleepingcomputer.com/ne...-of-the-past-come-haunting-in-spam-campaigns/

Specifically, two archives that today are mostly seen on computers of nostalgic geeks or professionals working with old files, have been used recently in spam campaigns to deliver info-stealing malware or a backdoor.

Researchers at Trend Micro spotted email malicious activity involving ARJ (Archived by Robert Jung) and Z data compression formats, which back in the days used to be worthy candidates for the archive types preferred by the users.

The payload in the spam campaign using this archive format is a backdoor that allows the attacker to "open, rename, upload and delete files in an affected computer, log keystrokes, and even capture images and voice using the computer’s camera and mic," the researchers discovered.
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