Almost half a million users globally have been affected by Adwind malware, according to a recent investigation by Kaspersky Lab.
The three-year investigation discovered different versions of the Adwind malware were used in attacks against at least 443,000 private users, commercial and non-commercial organisations around the world.
The research conducted between 2013 and 2016 found the Adwind RAT, a cross-platform, multifunctional malware program, remains active. It is also known as AlienSpy, Frutas, Unrecom, Sockrat, JSocket and jRat, and is distributed through a single malware-as-a-service platform.
At the end of 2015, Kaspersky Lab researchers became aware of an unusual malware program that had been discovered during an attempted targeted attack against a bank in Singapore. A malicious JAR file was attached to a spear-phishing email received by a targeted employee at the bank. The malware’s rich capabilities, including its ability to run on multiple platforms as well as the fact that it was not detected by any antivirus solution, immediately captured the attention of the researchers.
According to the company, it turned out that the organisation had been attacked with the Adwind RAT, a backdoor available for purchase and written entirely in Java, which makes it cross-platform.
It can run on Windows, OS X, Linux and Android platforms providing capabilities for remote desktop control, data gathering, data exfiltration, Kaspersky says.
If the targeted user opens the attached JAR file the malware self-installs and attempts to communicate with the command and control server.
The malware’s list of functions includes the ability to:
While it is used mainly by opportunistic attackers and distributed in massive spam campaigns, Kaspersky says there are cases where Adwind was used in targeted attacks.
In August 2015 Adwind appeared in news related to cyber-espionage against an Argentinian prosecutor who had been found dead in January 2015. The incident against the Singaporean bank was another example of a targeted attack.
According Kaspersky, a deeper look into events related to the usage of the Adwind RAT showed that these targeted attacks were not the only ones.
Targets of interest
During the investigation, Kaspersky Lab researchers were able to analyse nearly 200 examples of spear-phishing attacks organised by unknown criminals to spread the Adwind malware, and were able to identify the industries in which most of the targets worked:
Based on information from Kaspersky Security Network, the 200 examples of spear-phishing attacks observed in the six months between August 2015 and January 2016 resulted in Adwind RAT malware samples being encountered by more than 68,0000 users.
Based on the profiles of identified targets, Kaspersky Lab researchers believe that the clients of the Adwind platform fall into the following categories:
One of the main features that distinguishes the Adwind RAT from other commercial malware is that it is distributed openly in the form of a paid service, where the “customer” pays a fee in return for use of the malicious program, Kaspersky explains.
Based on an investigation of users' activity on the internal message board and some other observations, Kaspersky Lab researchers estimate that there were around 1800 users in the system by the end of 2015. This makes it one of the biggest malware platforms in existence today, the company says.
“The Adwind platform in its current state lowers significantly the minimum amount of professional knowledge required by a potential criminal looking to enter the area of cybercrime,” says Aleksandr Gostev, chief security expert at Kaspersky Lab.
“What we can say based on our investigation of the attack against the Singaporean bank is that the criminal behind it was far from a professional hacker, and we think that most of the Adwind platform’s “clients” have that level of computer education,” he says.
“That is a worrisome trend.”
Vitaly Kamluk, director of global research and analysis, APAC, Kaspersky Lab says despite multiple reports about different generations of the tool, published by security vendors in recent years, the platform is still active and inhabited with criminals of all kinds. “We’ve conducted this research in order to attract the attention of the security community and law enforcement agencies and to make the necessary steps in order to disrupt it completely,” he says.
Kaspersky Lab has reported its findings on the Adwind platform to law enforcement agencies.
In order to protect yourself and your organisation against this threat, Kaspersky Lab encourages enterprises to review the purpose of using a Java platform and to disable it for all unauthorised sources.