Rewterz Threat Alert – Wanna Cryptor aka WannaCry Ransomware – Active IOCs

Severity

High

Analysis Summary

WannaCry is also called WCry or WanaCrptor ransomware malware was discovered in May 2017, it infected networks running Microsoft Windows as part of a massive cyberattack. This ransomware can encrypt all your data files and demands payment to restore the stolen information, usually in bitcoin with a ransom amount. WannaCry is one of the most dangerous malware ever used for cyberattacks. The attackers behind WannaCry ransomware uses a tool called Eternal Blue to exploit a vulnerability in the Windows Server Message Block or SMB Protocol. The WannaCry attack spread so rapidly and infected so many computers worldwide that many industries were affected. This ransomware has caused serious disruptions in the healthcare sector and financial sector and locked out users from their data.

Impact

• File Encryption

Indicators of Compromise

MD5

fdbcddf5b6e58f4c83133170b82c96e8

SHA-256

ffe6b9f1de0ebe1668d73b4a3e79ef8231403dbf6b0081c5c0fbaf0dc3a18b07

SHA-1

ff190695f053818f9fb3c42cca6f33f7bd70c14c

Remediation

• Block all threat indicators at your respective controls.
• Search for Indicator of compromise (IOCs) in your environment utilizing your respective security controls
• Maintain cyber hygiene by updating your anti-virus software and implement patch management lifecycle.
• Maintain Offline Backups – In a ransomware attack, the adversary will often delete or encrypt backups if they have access to them. That’s why it’s important to keep offline (preferably off-site), encrypted backups of data and test them regularly.
• Emails from unknown senders should always be treated with caution.
• Never trust or open ” links and attachments received from unknown sources/senders.