Microsoft on Thursday warned of a “massive email campaign” that’s pushing a Java-based STRRAT malware to steal confidential data from infected systems while disguising itself as a ransomware infection.
“This RAT is infamous for its ransomware-like behavior of appending the file name extension .crimson to files without actually encrypting them,” the Microsoft Security Intelligence team said in a series of tweets.
The new wave of attacks, which the company spotted last week, commences with spam emails sent from compromised email accounts with “Outgoing Payments” in the subject line, luring the recipients into opening malicious PDF documents that claim to be remittances, but in reality, connect to a rogue domain to download the STRRAT malware.
Besides establishing connections to a command-and-control server during execution, the malware comes with a range of features that allow it to collect browser passwords, log keystrokes, and run remote commands and PowerShell scripts.
images from Hacker News