Blacktail
June 5, 2023
Topics
- Ransomware
Introduction
In recent months, a cybercrime group known as Blacktail has begun to make headlines as they continue to target organizations around the globe. The group was first spotted by the Unit 42 Team at Palo Alto Networks earlier this year. Since February, the group has launched multiple attacks based on their latest ransomware campaign labeled Buhti.
Tactics
An interesting detail about the organization is that they do not make their strains of malware. Rather, they opt to repurpose pre-existing strains to achieve their end goal of monetary gain. Two of the most popular tools that have been used by the cybercrime group are LockBit 3.0 for targets using Windows OS and Babuk for targets using Linux OS. Both LockBit 3.0 and Babuk are strains of ransomware that encrypt files on a victim's machine and demand payment in exchange for decrypting the files. These tools allow Blacktail to operate using a RaaS (ransomware as a service) model which falls in line with their goal of monetary gain.
Commonly Used Ransomwares
Lockbit 3.0 is the latest version of the Lockbit ransomware which was developed by the Lockbit group in early 2020. Since its launch, it has been linked to over 1400 attacks worldwide. This has led to the group receiving over $75 million in payouts. This ransomware is most distributed through phishing attacks where the victim clicks on a link that starts the download process.
Babuk is a ransomware that was first discovered in early 2021. Since then, it has been responsible for many cyber-attacks that have been launched against devices using Linux OS. This strain of ransomware serves a similar purpose to Lockbit 3.0, and its main purpose is to compromise files on a victim’s machine and make them inaccessible until the ransom is paid.
Recent Exploits
Recently, this group has been seen leveraging two different exploits. The first is CVE-2023-27350 which allows attackers to bypass the authentication required to utilize the Papercut NG 22.05 on affected endpoints. They leverage this vulnerability to install programs such as Cobalt Strike, Meterpreter, Sliver, and ConnectWise. These tools are used to steal credentials and move laterally within the target network. The second vulnerability, CVE-2022-47986, which affects the IBM Aspera Faspex File Exchange system allows attackers to perform remote code execution on the target devices.
Conclusion
Blacktail represents a significant threat in the world of cybercrime, employing a wide range of sophisticated methods to attack its victims. From phishing and social engineering to ransomware campaigns and APT attacks, their tactics demonstrate a high level of expertise and organization. To counter such threats, individuals, businesses, and governments must prioritize cybersecurity measures, including robust firewalls, regular software updates, employee training, and incident response plans. The fight against cybercrime requires constant vigilance to stay one step ahead of the attackers.
