PrintNightmare, SMB3 encryption, and your network

PrintNightmare, SMB3 encryption, and your network

By Yacin Nadji and Ben Reardon, Corelight Security Researchers CVE-2021-1675, also tracked in CVE-2021-34527, is a remote code execution vulnerability that targets the Windows Print Spooler service. In a nutshell, there is a Distributed Computing Environment / Remote Procedure Call (DCE/RPC) that allows authenticated users to add printer drivers to ... Read More
Corelight Sensors detect the ChaChi RAT

Corelight Sensors detect the ChaChi RAT

By Paul Dokas, Keith Jones, Anthony Kasza, Yacin Nadji, & Vern Paxson – Corelight Labs Team Recently Blackberry analyzed a new GoLang Remote Access Trojan (RAT) named “ChaChi.” This sample was interesting in that it tunnels information over DNS as its preferred command and control (C2) mechanism. We downloaded two ... Read More
Pingback: ICMP Tunneling Malware

Pingback: ICMP Tunneling Malware

By Keith Jones, Anthony Kasza and Ben Reardon, Security Researchers, Corelight Introduction Recently, Trustwave reported on a new malware family which they discovered during a breach investigation. The backdoor, dubbed Pingback, executes on Windows systems and communicates with its controller via ICMP messages. ICMP (Internet Control Message Protocol) is a ... Read More