Vulnerabilities / Threats

7/28/2017
05:30 PM
Connect Directly
Twitter
LinkedIn
RSS
E-Mail
50%
50%

Wannacry Inspires Worm-like Module in Trickbot

The malware is being primarily distributed via email spam in the form of spoofed invoices from an international financial services com, says Flashpoint.

The relative success that the authors of the WannaCry and NotPetya ransomware samples had in distributing their malware using a worm-like propagation method appears to be inspiring others to follow the same tack.

Security vendor Flashpoint this week reported discovering a new version of the Trickbot banking Trojan featuring a worm propagation module. The malware is being primarily distributed via email spam in the form of spoofed invoices from an international financial services company.

Once the malware infects a system it is designed to spread locally on the network via Server Message Block (SMB) shares. The new propagation module is rigged to scan an infected domain for vulnerable servers and computers via the NetServerEnum Windows API and Lightweight Directory Access Protocol (LDAP) enumeration.

So far, there has been no evidence of the modified version of Trickbot actually spreading via SMB shares. This suggests that the malware authors have not fully implemented the capability yet, Flashpoint security researcher Vitali Kremez, wrote in a blog this week.

According to Kremez, it is likely that the malware authors are testing how to equip Trickbot for lateral movement within a local area network with the goal of infecting more computers and co-opting them into a botnet.

News of the new worm-like module in Trickbot comes just days after Flashpoint warned that Trickbot, for the first time, was being used to target and infect customers of U.S. banks and financial institutions. Though Trickbot has been around since mid-2016 it has only targeted victims outside the U.S.

But since around the middle of July a new Trickbot spam campaign powered by the notorious Necurs botnet has begun targeting users in the US, United Kingdom, New Zealand, Canada, Denmark and several other countries.

The Necurs botnet is one of the world's largest botnets with up to one million infected Necurs bots being active at any time. The botnet has been around for several years and has been used to deliver a wide variety of malware. Recently it was tweaked to add a new component that allows it to be used for launching denial of service attacks.

Since July 17, there have been at least three Necurs botnet-powered spam waves that included Trickbot as the final payload, Flashpoint said.  The initial spam wave contained a spam email with a malicious Windows Script File attachment that purported to be from an Australian telecommunications company. More recent spam mails have evolved and involve spam emails with malicious macro-laden documents as attachments.

Related content:

 

Jai Vijayan is a seasoned technology reporter with over 20 years of experience in IT trade journalism. He was most recently a Senior Editor at Computerworld, where he covered information security and data privacy issues for the publication. Over the course of his 20-year ... View Full Bio

Comment  | 
Print  | 
More Insights
Comments
Newest First  |  Oldest First  |  Threaded View
Veterans Find New Roles in Enterprise Cybersecurity
Kelly Sheridan, Staff Editor, Dark Reading,  11/12/2018
Empathy: The Next Killer App for Cybersecurity?
Shay Colson, CISSP, Senior Manager, CyberClarity360,  11/13/2018
Understanding Evil Twin AP Attacks and How to Prevent Them
Ryan Orsi, Director of Product Management for Wi-Fi at WatchGuard Technologies,  11/14/2018
Register for Dark Reading Newsletters
White Papers
Video
Cartoon
Current Issue
Flash Poll
Online Malware and Threats: A Profile of Today's Security Posture
Online Malware and Threats: A Profile of Today's Security Posture
This report offers insight on how security professionals plan to invest in cybersecurity, and how they are prioritizing their resources. Find out what your peers have planned today!
Twitter Feed
Dark Reading - Bug Report
Bug Report
Enterprise Vulnerabilities
From DHS/US-CERT's National Vulnerability Database
CVE-2018-15769
PUBLISHED: 2018-11-16
RSA BSAFE Micro Edition Suite versions prior to 4.0.11 (in 4.0.x series) and versions prior to 4.1.6.2 (in 4.1.x series) contain a key management error issue. A malicious TLS server could potentially cause a Denial Of Service (DoS) on TLS clients during the handshake when a very large prime value is...
CVE-2018-18955
PUBLISHED: 2018-11-16
In the Linux kernel 4.15.x through 4.19.x before 4.19.2, map_write() in kernel/user_namespace.c allows privilege escalation because it mishandles nested user namespaces with more than 5 UID or GID ranges. A user who has CAP_SYS_ADMIN in an affected user namespace can bypass access controls on resour...
CVE-2018-19311
PUBLISHED: 2018-11-16
Centreon 3.4.x allows XSS via the Service field to the main.php?p=20201 URI, as demonstrated by the "Monitoring > Status Details > Services" screen.
CVE-2018-19312
PUBLISHED: 2018-11-16
Centreon 3.4.x allows SQL Injection via the searchVM parameter to the main.php?p=20408 URI.
CVE-2018-19318
PUBLISHED: 2018-11-16
SRCMS 3.0.0 allows CSRF via admin.php?m=Admin&c=manager&a=update to change the username and password of the super administrator account.