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

New Android Malware Adds Persistence, Targets Australian Banking Customers

Malware campaign, which finds and exfiltrates a user's contact list and banking credentials, could potentially grow to global proportions.

A new malware campaign that targets Android-using Australian banking customers has been discovered and, while the approach is not particularly sophisticated, elements of the malware have put security professionals around the world on guard.

The campaign, built around Gustuff malware, was discovered by Cisco Talos researchers and disclosed in a blog post authored by Vitor Ventura. The malware was offered as a botnet-for-rent on Exploit.in and has been shown to have the potential to hit banks and financial institutions around the world.

Talos researchers found the code to be obfuscated and packed, a combination that makes it very difficult to analyze with standard debuggers. They discovered that the code has multiple layers of protection against being run in a sandbox or on a device with antimalware in place. Once the code decides it's safe to execute, though, it becomes very active, very quickly.

The malware finds and exfiltrates a user's contact list and banking credentials, using one for spreading itself and the other for setting up criminal financial activity. So far, the malware is using SMS to spread rather slowly — slowly enough, in fact, for it to remain under the radar of many protective systems. Thus, while it's not spreading quickly at this point, it has a target list that would allow extensive replication and spread.

"Usually we would see this sort of malware spreading by email. The SMS is slower but sidesteps some standard defense," says Craig Williams, director, outreach, at Cisco Talos.

There are three other factors of special note with this campaign. First, it requires user intervention; the victim receives an SMS message containing a link that must be clicked on to begin the infection chain. The second is that the malware, once active, can intercept and respond to the SMS messages used in many two-factor authentication schemes.

The third special factor is fascinating to other security professionals. "One thing they did call out was the ability of this malware to re-establish its communications via text message," says John Todd, executive director of Quad9. "If it gets disconnected, an inbound text message will allow it to reconnect. It's an out-of-band control mechanism to re-establish broken command-and-control communications."

While this campaign is aimed at Australian institutions and customers, Williams says there's no barrier to its use against institutions around the world. The list of mobile financial apps monitored includes those from every major bank and many major financial institutions in the US and Europe. 

Given the nature of the malware's activities, there are few unbeatable technology solutions. "Because it spreads via SMS, it will come down to user education," Williams says. "Unfortunately, you can't patch the user, so it's always going to be a struggle."

Todd offers some specific instructions. "If you get an SMS from me with a URL in it, don't click on it. Don't click on a link in a text message unless you've gotten a phone call telling you to expect it," he says. "Don't click on a link with an IP address in it. You'll always want some DNS in the process, something with a recognizable name in it."

Related Content:

 

 

 

 

Join Dark Reading LIVE for two cybersecurity summits at Interop 2019. Learn from the industry's most knowledgeable IT security experts. Check out the Interop agenda here.

Curtis Franklin Jr. is Senior Editor at Dark Reading. In this role he focuses on product and technology coverage for the publication. In addition he works on audio and video programming for Dark Reading and contributes to activities at Interop ITX, Black Hat, INsecurity, and ... View Full Bio

Comment  | 
Print  | 
More Insights
Comments
Newest First  |  Oldest First  |  Threaded View
7 Truths About BEC Scams
Ericka Chickowski, Contributing Writer,  6/13/2019
DNS Firewalls Could Prevent Billions in Losses to Cybercrime
Curtis Franklin Jr., Senior Editor at Dark Reading,  6/13/2019
10 Notable Security Acquisitions of 2019 (So Far)
Kelly Sheridan, Staff Editor, Dark Reading,  6/15/2019
Register for Dark Reading Newsletters
White Papers
Video
Cartoon
Current Issue
Building and Managing an IT Security Operations Program
As cyber threats grow, many organizations are building security operations centers (SOCs) to improve their defenses. In this Tech Digest you will learn tips on how to get the most out of a SOC in your organization - and what to do if you can't afford to build one.
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-2019-12865
PUBLISHED: 2019-06-17
In radare2 through 3.5.1, cmd_mount in libr/core/cmd_mount.c has a double free for the ms command.
CVE-2017-10720
PUBLISHED: 2019-06-17
Recently it was discovered as a part of the research on IoT devices in the most recent firmware for Shekar Endoscope that the desktop application used to connect to the device suffers from a stack overflow if more than 26 characters are passed to it as the Wi-Fi name. This application is installed o...
CVE-2017-10721
PUBLISHED: 2019-06-17
Recently it was discovered as a part of the research on IoT devices in the most recent firmware for Shekar Endoscope that the device has Telnet functionality enabled by default. This device acts as an Endoscope camera that allows its users to use it in various industrial systems and settings, car ga...
CVE-2017-10722
PUBLISHED: 2019-06-17
Recently it was discovered as a part of the research on IoT devices in the most recent firmware for Shekar Endoscope that the desktop application used to connect to the device suffers from a stack overflow if more than 26 characters are passed to it as the Wi-Fi password. This application is install...
CVE-2017-10723
PUBLISHED: 2019-06-17
Recently it was discovered as a part of the research on IoT devices in the most recent firmware for Shekar Endoscope that an attacker connected to the device Wi-Fi SSID can exploit a memory corruption issue and execute remote code on the device. This device acts as an Endoscope camera that allows it...