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Joint Advisory – Iranian Cyber Actors Targeting Critical Infrastructure Organizations Using Brute Force

Yesterday, CISA and other federal and international partners released a joint Cybersecurity Advisory (CSA) “Iranian Cyber Actors' Brute Force and Credential Access Activity Compromise Critical Infrastructure.” The advisory highlights known indicators of compromise (IOCs) and tactics, techniques, and procedures (TTPs) used by Iranian cyber threat actors to disrupt organizations across critical infrastructure sectors.

Joint Cybersecurity Advisory – Update on SVR Cyber Operations and Vulnerability Exploitation

Last week, the NSA, FBI, and other federal and international partners issued a joint Cybersecurity Advisory (CSA) “Update on SVR Cyber Operations and Vulnerability Exploitation”. The joint CSA warns of ongoing Russian Federation Foreign Intelligence Service (SVR) cyber threats, highlighting how SVR actors are currently exploiting a set of software vulnerabilities and have intentions to exploit additional vulnerabilities.

CISA Alert – Best Practices to Configure BIG-IP LTM Systems

CISA has observed cyber threat actors leveraging unencrypted persistent cookies managed by the F5 BIG-IP Local Traffic Manager (LTM) module to enumerate other non-internet facing devices on the network. F5 BIG-IP is a suite of hardware and software solutions designed to manage and secure network traffic. A malicious cyber actor could leverage the information gathered from unencrypted persistence cookies to infer or identify additional network resources and potentially exploit vulnerabilities found in other devices present on the network.  

Threat Awareness – Microsoft Warns of Increased BEC Attack Tactics via File Hosting Services

Microsoft has recently observed more attack campaigns misusing file hosting services and which are increasingly using defense evasion tactics involving files with restricted access and view-only restrictions. They issued a warning in their threat intelligence blog on Tuesday, explaining that these attacks are intended to compromise identities and devices, and usually lead to further business email compromise (BEC) attacks.

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