Level 60
Content Creator
Malware Hunter
US Cyber Command has issued an alert via Twitter today about threat actors abusing an Outlook vulnerability to plant malware on government networks.

The vulnerability is CVE-2017-11774, a security bug that Microsoft patched in Outlook in the October 2017 Patch Tuesday.

The Outlook bug, discovered and detailed by security researchers from SensePost, allows a threat actor to escape from the Outlook sandbox and run malicious code on the underlying operating system.
US Cyber Command's Twitter account doesn't issue alerts about financially-motivated hacker crews targeting the US, and is focused on nation-state adversaries only.

US Cyber Command's Twitter alert is also not novel. The agency started publishing malware samples on VirusTotal and issuing Twitter alerts last fall, deeming it a faster way of spreading security alerts about ongoing cyber-attacks and putting the US private sector on notice.

Besides just tweeting a simple alert, the US Cyber Command's Twitter account also shared a link to five recent malware samples that were involved in the recent attacks.