Revenge

Revenge was one of the most popular remote access trojans to be used in 2019 when it was featured in a huge malicious campaign named “Aggah”. This malware can take remote control of infected machines and spy after the victims.

Type
Trojan
Origin
Unknown
First seen
1 January, 2016
Last seen
14 April, 2021
Global rank
33
Week rank
21
Month rank
20
IOCs
2660

What is Revenge Malware?

Revenge belongs to the class of Remote Access Trojans which means that it is usually used by the attackers to control infected PCs remotely or spy on the users by monitoring keystrokes and even computer surroundings through the remote webcam and microphone access.

Discovered for the first time in 2016, Revenge RAT continues to be a threat at the present day with a big spike in popularity monitored in 2019, when the malware was observed targeting corporations and government structures all around the world in a massive malicious campaign codenamed “Aggah”. Thanks to a large variety of distribution methods, robust core feature-set, and solid persistence mechanisms, Revenge has become a popular choice for cybercriminals. The popularity of this RAT was further aided by its open-source nature – anybody can freely download Revenge on underground hacking forums and employ it in their own campaigns.

General description of Revenge

The Revenge RAT was first observed in the wild in June 2016, when it was released by a user with a nick Napoleon – an Arabic speaking member of the underground hacking community.

The initial version of this malware was a simple malicious program that didn’t offer much, if any, code obfuscation and was mainly used by other Arabic speaking cybercriminals. Despite the simplicity of the malware, at the time, only one out of 54 of VirusTotal scanners could pick up the malicious nature of the Revenge code, which confused the researchers bearing in mind the lack of anti-analysis techniques.

The creator used Visual Basic to develop this RAT and personally admitted that the malware was very bare-bones at the time of its initial release– providing only the most basic functions and definitely losing to competitors in terms of core feature-set. According to Napoleon, this explained why Revenge was available free of charge.

After two months since the initial release, a new version v0.2 was issued by the author, on a more popular hacking forum, this time with more features, but still offered completely free of charge. Since then Revenge has evolved even further and today, it offers cybercriminals a wide range of capabilities including remote files and registry alterations on an infected machine, access to memory, processes and services as well as access to connected devices such as keyboards, webcams and mice, allowing this malware to record the actions of its victims and collect information like banking credentials and social account data.

Core malicious feature-set was not the only thing that evolved over the course of the Revenge lifetime. Improvements in distribution and persistence made this threat truly a force to be reckoned with. In some campaigns, scripts were executed in the HTML of a custom blogspot [com] page.

Revenge malware analysis

A video recorded in the ANY.RUN malware hunting service allows us to take a look at the execution of this malware as it unfolds.

process graph of the revenge trojan execution Figure 1: Displays the lifecycle of Revenge in a visual form. A graph generated by ANY.RUN

text report of the revenge analysis Figure 2: Shows a customizable text report generated by the ANY.RUN malware analysis service which allows diving deeper into the details of the Revenge execution process.

Revenge execution process

Sometimes the first steps of Revenge trojan execution may vary depending on how it made its way into a victim's computer. The most common form of initial infiltration vector is by the use of Mshta.exe for downloading the payload or for direct execution from a URL. After the payload is delivered to the infected machine, Mshta.exe changes the autorun value in the registry and starts three processes - cmd.exe, powershell.exe and schtasks.exe. It starts cmd.exe to kill processes from a list, in the given example processes from Microsoft Office packet were targeted. Powershell.exe is being launched to download the main payload. In turn, schtasks.exe is launched in a way to generate a scheduled task which provides Revenge persistence in the infected system. After all these steps, the malware is ready to complete commands from C2 servers.

How to avoid infection by Revenge?

The best line of defense against threats like Revenge RAT is to keep a security product installed and updated with the latest firmware. One should not disable native Windows security features, regularly update the OS and adhere to the best security practices of staying safe online.

As such, it is advised to stay clear of downloading email attachments from unknown senders and never enabling macros in Microsoft Office if prompted to do so by a file downloaded from a suspicious email.

Distribution of Revenge

Revenge has been seen being distributed in a variety of ways, some of which are potentially more effective than others. For example, Revenge is known to infect PCs from malicious email attachments and corrupted ads on compromised websites.

Most commonly, once delivered in the Microsoft Office file that was downloaded and launched by the potential victim, Revenge will use macros to connect to an outside domain, sometimes hidden on a web page, from which additional scripts and content are downloaded until the actual malware is installed on the PC.

How to detect Revenge RAT using ANY.RUN?

Analysts can get information about which MITRE ATT&CK™ MATRIX techniques were applied by malware. Just click on the "ATT&CK™ MATRIX " button.

Revenge MITRE ATT&CK MATRIX techniques Figure 3: Revenge MITRE ATT&CK MATRIX techniques

Conclusion

Revenge is no slouch when it comes to Remote Banking Trojans. It has begun it’s lifespan as a simplistic malware with functionality and without anti-analysis features but has evolved to become a capable and persistent trojan used in massive attacks in Europe, North America, Asia, and the Middle East.

The popularity of this malware is not only due to its robust feature-set, but also ready availability since Revenge can be downloaded for free from a number of underground communities.

Professionals can establish a secure cyber defense against Revenge and similar RATs and secure their corporate or government networks by reverse engineering and studying a threat using malware hunting services like to ANY.RUN.

IOCs

IP addresses
3.125.223.134
3.124.142.205
18.158.249.75
79.134.225.73
3.132.159.158
3.140.223.7
52.14.18.129
3.22.53.161
3.131.207.170
13.59.15.185
13.59.15.185
3.128.107.74
89.82.152.254
3.13.191.225
3.22.30.40
193.161.193.99
3.17.7.232
3.14.182.203
3.136.65.236
3.134.125.175
Hashes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WindowsAuthentication324-49629.portmap.host
coodyz.site
0.tcp.eu.ngrok.io
majul.com
6.tcp.ngrok.io
bestubuy.ddns.net
smart0147.ddns.net
bliss123.ddns.net
bmz.duckdns.org
abigguy.ddns.net
britianica.uk.com
accer.sytes.net
cashoutmoney.ddns.net
booking.msg.bluhotels.com
booking.msg.bluhotels.com
nigachin228.ddns.net
bccd.duckdns.org
2.tcp.ngrok.io
3.tcp.ngrok.io
facexteste.hopto.org

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