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.

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
US Turning Up the Heat on North Korea's Cyber Threat Operations
Jai Vijayan, Contributing Writer,  9/16/2019
MITRE Releases 2019 List of Top 25 Software Weaknesses
Kelly Sheridan, Staff Editor, Dark Reading,  9/17/2019
Register for Dark Reading Newsletters
White Papers
Video
Cartoon Contest
Write a Caption, Win a Starbucks Card! Click Here
Latest Comment: "He's too shy to invite me out face to face!"
Current Issue
7 Threats & Disruptive Forces Changing the Face of Cybersecurity
This Dark Reading Tech Digest gives an in-depth look at the biggest emerging threats and disruptive forces that are changing the face of cybersecurity today.
Flash Poll
The State of IT Operations and Cybersecurity Operations
The State of IT Operations and Cybersecurity Operations
Your enterprise's cyber risk may depend upon the relationship between the IT team and the security team. Heres some insight on what's working and what isn't in the data center.
Twitter Feed
Dark Reading - Bug Report
Bug Report
Enterprise Vulnerabilities
From DHS/US-CERT's National Vulnerability Database
CVE-2019-16680
PUBLISHED: 2019-09-21
An issue was discovered in GNOME file-roller before 3.29.91. It allows a single ./../ path traversal via a filename contained in a TAR archive, possibly overwriting a file during extraction.
CVE-2019-16681
PUBLISHED: 2019-09-21
The Traveloka application 3.14.0 for Android exports com.traveloka.android.activity.common.WebViewActivity, leading to file disclosure and XSS.
CVE-2019-16677
PUBLISHED: 2019-09-21
An issue was discovered in idreamsoft iCMS V7.0. admincp.php?app=members&do=del allows CSRF.
CVE-2019-16678
PUBLISHED: 2019-09-21
admin/urlrule/add.html in YzmCMS 5.3 allows CSRF with a resultant denial of service by adding a superseding route.
CVE-2019-16679
PUBLISHED: 2019-09-21
Gila CMS before 1.11.1 allows admin/fm/?f=../ directory traversal, leading to Local File Inclusion.