Ransomware

Cryptojacking

Malware

Cybercrime

Nosu

Nosu

Nosu is a ransomware strain that encrypts the victim's files and demands payment in exchange for the decryption key. It operates by spreading through infected email attachments and network shares, and can cause significant data loss and downtime for affected organizations.

Known Variants

Known Variants

APT15, Ke3chang, Vixen Panda

APT15, Ke3chang, Vixen Panda

Mitigation Strategies

Mitigation Strategies

Nosu operates with stealth, leveraging custom tools that allow for long-term access. To mitigate this, organizations should segment networks to prevent lateral movement and ensure all sensitive data is protected by strict access control policies. Regular patching and monitoring of all endpoints can help identify and mitigate any potential vulnerabilities early. Threat intelligence sharing and advanced detection systems should be employed to monitor for indicators of compromise (IOCs) linked to Nosu.

Targeted Industries or Sectors

Targeted Industries or Sectors

Nosu has been active in targeting government agencies, defense contractors, energy companies, and diplomatic entities. These industries are prime targets for espionage and intelligence gathering.

Nosu has been active in targeting government agencies, defense contractors, energy companies, and diplomatic entities. These industries are prime targets for espionage and intelligence gathering.

Associated Threat Actors

Associated Threat Actors

Nosu is attributed to the Chinese state-sponsored cyber espionage group APT15 (also known as Ke3chang or Vixen Panda).

Nosu is attributed to the Chinese state-sponsored cyber espionage group APT15 (also known as Ke3chang or Vixen Panda).

References