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
13 July, 2020
Global rank
31
Week rank
14
Month rank
22
IOCs
1637

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
193.161.193.99
192.169.69.25
3.13.191.225
93.41.148.239
3.135.90.78
3.17.117.250
3.20.98.123
3.137.63.131
3.124.142.205
3.125.223.134
79.134.225.72
193.56.28.101
78.85.165.213
141.255.157.76
182.186.224.209
79.134.225.82
91.193.75.29
175.202.44.7
213.22.208.67
100.24.21.40
Hashes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isns.net
lightpolebaby-53968.portmap.host
xSkewber-51172.portmap.host
gencho123-61856.portmap.host
gencho123-56629.portmap.host
VannaLamb-21641.portmap.host
xSkewber-41860.portmap.host
iggdaan-41747.portmap.host
skorqro-20231.portmap.host
coronanancy14-50163.portmap.io
skorqro-49877.portmap.host
Yourmum-62036.portmap.host
skorqro-38376.portmap.host
alportoino-55163.portmap.host
josh223424234234-28546.portmap.host
ISLAMv2-32371.portmap.io
jeffposom-27399.portmap.host
jeffposom-39367.portmap.host
portababy-24207.portmap.host
Jqzzo-50729.portmap.host

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