Anomali Cyber Watch: AcidRain Wiped Viasat Modems, BlackMatter Rewritten into BlackCat Ransomware, SaintBear Goes with Go, and More

The various threat intelligence stories in this iteration of the Anomali Cyber Watch discuss the following topics: APT, Information stealers, Phishing, Russia, Ukraine, Vulnerabilities, and Wipers. The IOCs related to these stories are attached to Anomali Cyber Watch and can be used to check your logs for potential malicious activity.



Figure 1 - IOC Summary Charts. These charts summarize the IOCs attached to this magazine and provide a glimpse of the threats discussed.



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AcidRain | A Modem Wiper Rains Down on Europe



(published: March 31, 2022)



On February 24, 2022, Viasat KA-SAT modems became inoperable in Ukraine after threat actors exploited a misconfigured VPN appliance, compromised KA-SAT network, and were able to execute management commands on a large number of residential modems simultaneously. SentinelOne researchers discovered that a specific Linux wiper, dubbed AcidRain, likely used in that attack as it shows the same targeting and the same overwriting method that was seen in a Viasat’s Surfbeam2 modem targeted in the attack. AcidRain shows code similarities with VPNFilter stage 3 wiping plugin called dstr, but AcidRain’s code appears to be sloppier, so the connection between the two is still under investigation.Analyst Comment: Internet service providers are heavily targeted due to their trust relationships with their customers and they should harden their configurations and access policies. Devices targeted by AcidRain can be brought back to service through flash memory/factory reset. Organizations exposed to Russia-Ukrainian military conflict should plan for backup options in case of a wiper attack.MITRE ATT&CK: [MITRE ATT&CK] Data Destruction - T148 ..

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