Category: Threat Research

Providing Solutions

Conti and Karma actors attack healthcare provider at same time through ProxyShell exploits

An unpatched Microsoft Exchange Server let both ransomware actors in; Karma just stole data, while Conti encrypted.

Dridex bots deliver Entropy ransomware in recent attacks

Some code used in the ransomware bear a resemblance to code used in Dridex malware, hinting at a common origin

Log4Shell: How the Attackers’ Faces Have Changed Over Time

Following an article on January 24, 2022 of Log4Shell scanning and attack detections since the bug was reported, Sophos addresses reader questions about who’s behind it all

SolarMarker campaign used novel registry changes to establish persistence

Inserting custom file handling rules for a randomly-created file extension and a .LNK in Windows’ startup folder, malware installer created a stealthy persistence mechanism for backdoor.