Rewterz Threat Alert – Ryuk Ransomware – Active IOCs

Severity

High

Analysis Summary

Ryuk Ransomware is a ransomware family that was first found in the wild in August 2018. It is one of the most virulent ransomware strains on the market. Ryuk has been observed being used to attack companies or professional environments. This ransomware can lock your files or systems and hold them hostage for ransom. Ryuk targets high-profile enterprises in order to obtain essential information that will impair the victim’s operations.

Ryuk is a form of ransomware used in targeted attacks, in which threat actors encrypt important data to demand big ransom payments. Emotet or TrickBot malware is widely used to spread Ryuk ransomware. Ryuk’s code is comparable to that of the Hermes ransomware. The Ryuk ransomware is believed to be operated by the Russian cybercriminal group WIZARD SPIDER.

Impact

• File encryption
• Privilege Escalation 
• Information Theft 
• Data Exfiltration 
• Network Compromise

Indicators of Compromise

MD5

• 154b73d0a7aa19df12364a78b235f29f

SHA-256

• f534d1038be3bf9e0909d28ed1acb77825d1424b691a9259f4b7f605e105aaea

SHA-1

• 5e39ad8cd8f05d29b7587a876c318be5c0511dcc

Remediation

• Block all threat indicators at your respective controls.
• Search for IOCs in your environment