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June 8, 2022Severity
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
- af95a47e20a6d6b195567a5132945e39
SHA-256
- 08d528f7f0c829513b1e1690dcf8de371c0b6892795e92e706de2edbbb4aceae
SHA-1
- 01e62f05e4144503f18bf4c7300f1ca79c27e1cd
Remediation
- Block all threat indicators at your respective controls.
- Search for IOCs in your environment