Severity
High
Analysis Summary
A string of high profile attacks has been detected that have been crippling companies. The current waves of attacks have been known to use a combination of Emotet, Trickbot, and Ryuk. In recent weeks, the actors behind Ryuk have even been observed using ZeroLogon to extend their reach and broaden the delivery of their ransomware payloads. The current waves of attacks have been known to use a combination of Emotet, Trickbot, and Ryuk. While the Ryuk payloads do not specifically contain the ZeroLogon functionality, the flaw is being leveraged at earlier stages in the attack chain. Attackers are able to use existing capabilities in Cobalt Strike and similar frameworks to achieve the privilege escalation. It is quickly becoming clear that ZeroLogon will become a staple in the attackers’ collective “toolbelt”.
Impact
- Privilege Escalation
- Information Theft
- Data Exfiltration
- Files Encryption
- Network Compromise
Indicators of Compromise
MD5
- c0202cf6aeab8437c638533d14563d35
- 437262fa4eaf6c91c40a40789ae11d33
- 7d3f19b760cb1958a2c4d9ca7492c406
SHA-256
- 8d3f68b16f0710f858d8c1d2c699260e6f43161a5510abb0e7ba567bd72c965b
- 7e28426e89e79e20a6d9b1913ca323f112868e597fcaf6b9e073102e73407b47
- f8bc1638ec3b04412f708233e8586e1d91f18f6715d68cba1a491d4a7f457da0
SHA1
- 5767653494d05b3f3f38f1662a63335d09ae6489
- 4020a6863b53456bcc53140339b6312e004d53d5
- c3fa91438850c88c81c0712204a273e382d8fa7b
Remediation
- Block the threat indicators at their respective controls.
- Immediately patch the ZeroLogon vulnerability if it hasn’t been patched already.
- Do not download files attached in untrusted emails.
- Maintain a strong password policy and implement multifactor authentication where possible.