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IOCs

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.

Trojan
Type
Unknown
Origin
1 January, 2016
First seen
18 April, 2024
Last seen

How to analyze Revenge with ANY.RUN

Type
Unknown
Origin
1 January, 2016
First seen
18 April, 2024
Last seen

IOCs

IP addresses
216.170.126.13
41.239.162.10
Hashes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vikkuvikku.ddns.net
Last Seen at

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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 similar to ransomware, 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 and also other malicious programs like ransomware.

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 the 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 that 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. The same advice comes for other threats like Glupteba and Smoke Loader.

Distribution of Revenge

Revenge has been seen being distributed in a variety of ways the same as ransomware, 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 its lifespan as a simplistic malware such as ransomware 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.

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