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Home Alerts

RansomHub Exploits TDSSKiller to Disable EDR

September 11, 2024
Reading Time: 2 mins read
in Alerts
RansomHub Exploits TDSSKiller to Disable EDR

The RansomHub ransomware group has recently demonstrated a sophisticated approach to compromising endpoint security by exploiting Kaspersky’s TDSSKiller tool. Originally designed to detect and eliminate rootkits and bootkits, TDSSKiller is being repurposed by the attackers to disable endpoint detection and response (EDR) services on target systems. This strategic move allows the ransomware to neutralize key security measures that are critical for monitoring and controlling system activities, thereby increasing the likelihood of a successful attack.

Once the EDR defenses are compromised, RansomHub deploys the LaZagne credential-harvesting tool to extract sensitive login information from various application databases. This enables the attackers to move laterally within the network, potentially gaining access to a broader range of systems and data. During a recent attack investigated by Malwarebytes, the LaZagne tool generated numerous file writes, likely containing logs of stolen credentials, which the attackers may attempt to delete to cover their tracks.

The use of TDSSKiller in this context is particularly concerning because the tool is signed with a valid certificate, making it less likely to be flagged or stopped by traditional security solutions. The attackers execute TDSSKiller from a temporary directory using a dynamically generated filename, allowing them to bypass security measures without raising immediate alarms. This tactic underscores the need for advanced defenses capable of recognizing and responding to such sophisticated evasion techniques.

To mitigate the risks associated with this threat, cybersecurity experts advise enabling tamper protection features on EDR solutions to prevent attackers from disabling them with tools like TDSSKiller. Additionally, monitoring for specific command parameters, such as the ‘-dcsvc’ flag used to disable or delete services, can help detect and block malicious activity. Proactive measures and vigilant monitoring are essential to defend against these increasingly complex ransomware attacks.

Reference:

  • RansomHub Exploits Kaspersky TDSSKiller to Disable EDR Software
Tags: Cyber AlertsCyber Alerts 2024Cyber threatsEDRKasperskyRansomHubSeptember 2024TDSSKiller
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