Did you get hacked?

A Large corporation with a well-funded cyber security team recently found out they’d been hacked! Their opponents used the combination of Living off the Land (LotL) techniques, fileless malware, legitimate credentials, and disguised communication makes these types of botnet activities incredibly difficult to detect, even for their expert tiger teams. Without the right focus on behavioral analysis, memory forensics, and network monitoring, even highly skilled teams could miss the subtle signs of this advanced form of attack.

If your teams are looking for traditional malware or malicious executables, they might not have focused on monitoring the activities of legitimate tools. Attackers are now using these tools can camouflage their actions to blend in with normal system administration tasks, so even if your tiger teams were monitoring system processes, the malicious use of these tools could easily go unnoticed.

One of the core advantages of LotL is the use of fileless techniques, which means that the attackers often don’t drop detectable malware on the system’s disk. Instead, they execute code directly in memory or utilize scripting environments like PowerShell. This method leaves behind little to no trace that traditional malware-detection tools or endpoint security would recognize.

The teams may have been conducting disk-based or signature-based analysis, which would be ineffective against fileless malware. Without leaving artifacts on the disk, the attackers bypass traditional endpoint detection, which would have been a major focus of the teams.
Since most of the activity occurs in memory, it would require deep memory forensics to uncover these types of attacks. If the tiger teams didn’t perform real-time memory analysis or use sophisticated memory forensics tools, they could miss the attack entirely.

Story By Skeeter Wesinger

September 19, 2024