Dark Reading is part of the Informa Tech Division of Informa PLC

This site is operated by a business or businesses owned by Informa PLC and all copyright resides with them.Informa PLC's registered office is 5 Howick Place, London SW1P 1WG. Registered in England and Wales. Number 8860726.

Threat Intelligence

10/9/2020
02:15 PM
50%
50%

Critical Zerologon Flaw Exploited in TA505 Attacks

Microsoft reports a new campaign leveraging the critical Zerologon vulnerability just days after nation-state group Mercury was seen using the flaw.

Microsoft has observed new threat activity exploiting the critical Zerologon vulnerability (CVE-2020-1472. The campaign poses as software updates that connect with known TA505 command-and-control infrastructure, the company reports.

Related Content:

6 Things to Know About the Microsoft 'Zerologon' Flaw

2020 State of Cybersecurity Operations and Incident Response

New on The Edge: Emotet 101: How the Ransomware Works -- and Why It's So Darn Effective

TA505 is a Russian-speaking threat group known for spreading the Dridex banking Trojan and Locky ransomware. While its victim organizations span sizes and industries, it's known to target financial organizations and use a range of attack techniques to achieve its nefarious goals.

This time it's weaponizing Zerologon, a vulnerability that has become a patching priority since Microsoft released one of two planned fixes in August. The flaw exists when an attacker creates a vulnerable Netlogon secure channel connection to a domain controller using MS-NRPC. With this, they don't need to authenticate in order to elevate privileges and become an admin. 

TA505, which Microsoft calls Chimborazo, is distributing fake updates that lead to UAC bypass and using wscript[.]exe to run malicious code. To exploit this vulnerability, the attackers abuse MSBuild[.]exe to compile Mimikatz updated with built-in Microsoft functionality, the company's security intelligence team explains in a series of tweets on their discovery.

"Attacks showing up in commodity malware like those used by the threat actor Chimborazo indicate broader exploitation in the near term," says Microsoft, encouraging readers to update.

This is the second time this week attackers were seen using Zerologon in the wild. Mercury, an Iranian APT group also known as MuddyWater, Static Kitten, and Seedworm, has been using the vulnerability in active campaigns over the past two weeks, Microsoft Security Intelligence found. Mercury has historically targeted government organizations, especially those in the Middle East.

Read more details here.

Dark Reading's Quick Hits delivers a brief synopsis and summary of the significance of breaking news events. For more information from the original source of the news item, please follow the link provided in this article. View Full Bio
 

Recommended Reading:

Comment  | 
Print  | 
More Insights
Comments
Newest First  |  Oldest First  |  Threaded View
COVID-19: Latest Security News & Commentary
Dark Reading Staff 11/19/2020
New Proposed DNS Security Features Released
Kelly Jackson Higgins, Executive Editor at Dark Reading,  11/19/2020
How to Identify Cobalt Strike on Your Network
Zohar Buber, Security Analyst,  11/18/2020
Register for Dark Reading Newsletters
White Papers
Video
Cartoon Contest
Write a Caption, Win an Amazon Gift Card! Click Here
Latest Comment: A GONG is as good as a cyber attack.
Current Issue
2021 Top Enterprise IT Trends
We've identified the key trends that are poised to impact the IT landscape in 2021. Find out why they're important and how they will affect you today!
Flash Poll
Twitter Feed
Dark Reading - Bug Report
Bug Report
Enterprise Vulnerabilities
From DHS/US-CERT's National Vulnerability Database
CVE-2020-25660
PUBLISHED: 2020-11-23
A flaw was found in the Cephx authentication protocol in versions before 15.2.6 and before 14.2.14, where it does not verify Ceph clients correctly and is then vulnerable to replay attacks in Nautilus. This flaw allows an attacker with access to the Ceph cluster network to authenticate with the Ceph...
CVE-2020-25688
PUBLISHED: 2020-11-23
A flaw was found in rhacm versions before 2.0.5 and before 2.1.0. Two internal service APIs were incorrectly provisioned using a test certificate from the source repository. This would result in all installations using the same certificates. If an attacker could observe network traffic internal to a...
CVE-2020-25696
PUBLISHED: 2020-11-23
A flaw was found in the psql interactive terminal of PostgreSQL in versions before 13.1, before 12.5, before 11.10, before 10.15, before 9.6.20 and before 9.5.24. If an interactive psql session uses \gset when querying a compromised server, the attacker can execute arbitrary code as the operating sy...
CVE-2020-26229
PUBLISHED: 2020-11-23
TYPO3 is an open source PHP based web content management system. In TYPO3 from version 10.4.0, and before version 10.4.10, RSS widgets are susceptible to XML external entity processing. This vulnerability is reasonable, but is theoretical - it was not possible to actually reproduce the vulnerability...
CVE-2020-28984
PUBLISHED: 2020-11-23
prive/formulaires/configurer_preferences.php in SPIP before 3.2.8 does not properly validate the couleur, display, display_navigation, display_outils, imessage, and spip_ecran parameters.