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MICROSOFT BLAMES CLOP RANSOMWARE GANG FOR ‘MOVEIT TRANSFER’ ATTACKS

June 5, 2023  By Pierluigi Paganini




MICROSOFT ATTRIBUTES THE RECENT CAMPAIGN EXPLOITING A ZERO-DAY IN THE MOVEIT
TRANSFER PLATFORM TO THE CLOP RANSOMWARE GANG.

The Clop ransomware gang (aka Lace Tempest) is credited by Microsoft for the
recent campaign that exploits a zero-day vulnerability, tracked as
CVE-2023-34362, in the MOVEit Transfer platform.







The Microsoft Threat Intelligence team pointed out that the Lace Tempest group
has already used similar vulnerabilities in the past to steal data from
organizations worldwide and extort them.


00:00/00:00


MOVEit Transfer is a managed file transfer that is used by enterprises to
securely transfer files using SFTP, SCP, and HTTP-based uploads.

The vulnerability is a SQL injection vulnerability, it an be exploited by an
unauthenticated attacker to gain unauthorized access to MOVEit Transfer’s
database.

“a SQL injection vulnerability has been found in the MOVEit Transfer web
application that could allow an un-authenticated attacker to gain unauthorized
access to MOVEit Transfer’s database.” reads the advisory published by the
company. “Depending on the database engine being used (MySQL, Microsoft SQL
Server, or Azure SQL), an attacker may be able to infer information about the
structure and contents of the database in addition to executing SQL statements
that alter or delete database elements.”

The vulnerability affects all MOVEit Transfer versions, it doesn’t affect the
cloud version of the product. The company also shared Indicators of Compromise
(IoCs) for this attack and urges customers that notice any of the indicators to
immediately contact its security and IT teams.

Multiple security firms are warning that the vulnerability has been actively
exploited in the wild.

GreyNoise researchers have observed scanning activity for the login page of
MOVEit Transfer located at /human.aspx as early as March 3rd, 2023, for this
reason, the experts recommend Progress customers to review potentially malicious
activity that was recorded in the last 90 days.

“While we have not observed activity directly related to exploitation, all of
the 5 IPs we have observed attempting to discover the location of MOVEit
installations were marked as “Malicious” by GreyNoise for prior activities.”
reads the alert published by GreyNoise. “The primary artifact, observed through
publicly available information, is the presence of a webshell named human2.aspx.
This is a post-exploitation file artifact that is written to the filesystem by a
malicious actor allowing them to execute arbitrary commands. GreyNoise is
observing scanning activity looking to identify the presence of the human2.aspx
webshell dropped as part of the post-exploitation activity.”

By May 31, Rapid7 experts discovered approximately 2,500 instances of MOVEit
Transfer publicly accessible on the internet, with a significant portion located
in the United States.

“Our teams have so far observed the same webshell name in multiple customer
environments, which may indicate automated exploitation.” reported Rapid7.

Microsoft researchers confirmed that the attackers exploit the vulnerability to
deploy a web shell with data exfiltration capabilities. Threat actors exploit
the CVE-2023-34362 to authenticate as a user with the highest privileges to
exfiltrate files.

The IT giant urges organizations potentially impacted by the CVE-2023-34362 flaw
to apply security patches and perform mitigation actions shared by the vendor.









Follow me on Twitter: @securityaffairs and Facebook and Mastodon

Pierluigi Paganini

(SecurityAffairs – hacking, clop ransomware)


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PIERLUIGI PAGANINI

Pierluigi Paganini is member of the ENISA (European Union Agency for Network and
Information Security) Threat Landscape Stakeholder Group and Cyber G7 Group, he
is also a Security Evangelist, Security Analyst and Freelance Writer.
Editor-in-Chief at "Cyber Defense Magazine", Pierluigi is a cyber security
expert with over 20 years experience in the field, he is Certified Ethical
Hacker at EC Council in London. The passion for writing and a strong belief that
security is founded on sharing and awareness led Pierluigi to find the security
blog "Security Affairs" recently named a Top National Security Resource for US.
Pierluigi is a member of the "The Hacker News" team and he is a writer for some
major publications in the field such as Cyber War Zone, ICTTF, Infosec Island,
Infosec Institute, The Hacker News Magazine and for many other Security
magazines. Author of the Books "The Deep Dark Web" and “Digital Virtual Currency
and Bitcoin”.




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