The US-CERT Current Activity web page is a regularly updated summary of the most frequent, high-impact types of security incidents currently being reported to the US-CERT.

RSS feed for current activities

CNMF Identifies and Discloses Malware used by Iranian APT MuddyWater

U.S. Cyber Command’s Cyber National Mission Force (CNMF) has identified multiple open-source tools used by an Iranian advanced persistent threat (APT) group known as MuddyWater. According to CNMF, “MuddyWater has been seen using a variety of techniques to maintain access to victim networks. These include side-loading DLLs in order to trick legitimate programs into running malware and obfuscating PowerShell scripts to hide command and control functions.” U.S. Cyber Command has released malware samples attributed to MuddyWater to the malware aggregation tool and repository, VirusTotal.

Adobe Releases Security Updates for Multiple Products

Adobe has released security updates to address vulnerabilities in multiple Adobe products. An attacker could exploit some of these vulnerabilities to take control of an affected system.

CISA encourages users and administrators to review the following Adobe Security Bulletins and apply the necessary updates.

Citrix Releases Security Update for Workspace App for Linux

Citrix has released a security update to address a vulnerability in Workspace App for Linux. An attacker could exploit this vulnerability to take control of an affected system.

CISA encourages users and administrators to review Citrix Security Update CTX338435 and apply the necessary update.

SAP Releases January 2022 Security Updates

SAP has released security updates to address vulnerabilities affecting multiple products. An attacker could exploit some of these vulnerabilities to take control of an affected system.

CISA encourages users and administrators to review the SAP Security Notes for January 2022 and apply the necessary updates.

Microsoft Releases January 2022 Security Updates

Microsoft has released updates to address multiple vulnerabilities in Microsoft software. An attacker could exploit some of these vulnerabilities to take control of an affected system.

CISA encourages users and administrators to review Microsoft’s January 2022 Security Update 
Summary
 and Deployment Information and apply the necessary updates.

Mozilla Releases Security Updates for Firefox, Firefox ESR, and Thunderbird

Mozilla has released security updates to address vulnerabilities in Firefox, Firefox ESR, and Thunderbird. An attacker could exploit some of these vulnerabilities to take control of an affected system.