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IOCs

njRAT is a remote access trojan. It is one of the most widely accessible RATs on the market that features an abundance of educational information. Interested attackers can even find tutorials on YouTube. This allows it to become one of the most popular RATs in the world.

Trojan
Type
Middle East
Origin
1 January, 2013
First seen
17 July, 2024
Last seen
Also known as
Bladabindi
Njw0rm

How to analyze njRAT with ANY.RUN

Type
Middle East
Origin
1 January, 2013
First seen
17 July, 2024
Last seen

IOCs

IP addresses
109.206.242.119
93.170.46.31
178.80.111.72
90.207.167.210
162.220.10.165
104.22.48.74
95.83.0.34
185.139.70.178
98.4.100.172
188.116.145.233
156.222.52.118
83.59.239.179
41.142.42.121
194.71.227.62
172.67.135.130
185.199.109.133
144.126.144.223
192.121.87.108
193.42.33.179
5.35.153.131
Hashes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msvenom.ddns.net
unit-latinas.gl.at.ply.gg
sniperexe.zapto.org
nj2121.duckdns.org
mayocap12ok.duckdns.org
nzul13-3-23.duckdns.org
them-recommended.gl.at.ply.gg
documents-elegant.at.ply.gg
provided-existence.gl.at.ply.gg
press-higher.gl.at.ply.gg
five-sequences.gl.at.ply.gg
jvjv2044duck33.duckdns.org
politics-installing.gl.at.ply.gg
asdaryder.duckdns.org
verde2021.duckdns.org
enero2022async.duckdns.org
windwosupdata.ddns.net
century-missed.gl.at.ply.gg
supply-deputy.at.ply.gg
legal-nextel.gl.at.ply.gg
URLs
https://pastebin.com/raw/Xde8ekvN
https://pt.textbin.net/download/insdj4bhn2
https://pastes.io/download/g4enqwgps4
https://pastebin.com/raw/Hu1K7Y4W
https://pastebin.com/raw/VGGi28kN
https://pastebin.com/raw/jxx7yjgK
https://6ded-177-50-200-148.ngrok-free.app/
https://pastebin.com/raw/vZM3LPTw
https://pt.textbin.net/download/rcd5ihynxw
https://pastebin.com/raw/UgsiXFgH
https://pastebin.com/raw/YKgY3s0H
https://pastebin.com/raw/rdmzbeYW
https://pastebin.com/raw/fnugwhmF
https://pastebin.com/raw/CmJ80yPc
https://pastebin.com/raw/MiKBEm2x
https://pastebin.com/raw/LPn410Wj
https://pastebin.com/raw/GUZjvbiL
https://pastebin.com/raw/q6JvsRJz
https://pastebin.com/raw/S1HhZSCU
https://pastebin.com/raw/0mKM5dgn
Last Seen at

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What is njRAT Malware?

njRAT, also called Bladabindi and Njw0rm is a remote access trojan that is used to remotely control infected machines. Because of its availability, excess of online tutorials, plenty of information, and a robust core feature set along with several implemented evading techniques made njRAT one of the most widely used RATs in the world.

This malware was detected for the first time in 2013, however, some related RATs have been observed by researchers in 2012. The highest surge of njRAT trojan attacks was recorded in 2014 in the middle east, which is the most targeted region for this malware.

General Information about njRAT

njRAT trojan is built on the .NET framework. This RAT gives hackers the ability to control the victim’s PC remotely. njRAT allows attackers to activate the webcam, log keystrokes, and steal passwords from web browsers as well as multiple desktop apps.

In addition, the malware gives hackers access to the command line on the infected machine. It allows to kill processes as well as remotely execute and manipulate files. On top of that, njRAT is capable of manipulating the system registry. When infected, Bladabindi trojan will collect several bits of information about the PC that it got into, including the name of the computer, operating system number, country of the computer, usernames, and OS version.

Also, this malware is able to target cryptocurrency wallet applications and steal cryptocurrency from PCs. For example, it is known to be able to grab bitcoins and even access credit card information which sometimes can be stored in crypto apps as a means to purchase cryptocurrency.

After infecting a computer the malware uses a variable name and copies into %TEMP%, %APPDATA%, %USERPROFILE%,%ALLUSERSPROFILE% or %windir% – a behavior not uncommon for this time of malware. It can also copy itself into <any string>.exe, to ensure that it will be activated every time the victim switches on their computer.

njRAT trojan has a few tricks up its sleeve to avoid detection by antivirus software. For example, it uses multiple .NET obfuscators to obstruct its code. Another technique that the malware uses is disguising itself into a critical process. This does not allow the user to shut it down. It also makes njRAT hard to remove from the infected PCs. Bladabindi RAT can also deactivate processes that belong to antivirus software, allowing it to stay hidden. njRAT also knows how to detect if it has been run on a virtual machine which helps the attackers to set up countermeasures against researchers.

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Authors of Bladabindi are leveraging Pastebin to avoid investigation by cybersecurity researchers. njRAT downloads additional components and executes secondary-stage payloads from Pastebin. So, the malware has no need to establish a traditional command-and-control (C2) server. The Pastebin creates a pathway between njRAT infections and new payloads. With the trojan acting as a downloader, it will grab encoded data dumped on Pastebin, decode, and deploy.

For spreading, njRAT can detect external hard drives connected via USB. Once such a device is detected, the RAT will copy itself onto the connected drive and create a shortcut.

Who created njRAT?

Creators of njRAT are members of an underground hacker community named Sparclyheason. Evidently, they have created a very popular and destructive malware. njRAT was classified as “severe” by Microsoft Malware Protection Center.

In fact, following a large malicious campaign in 2014, Microsoft shut down four million websites in an effort to filter traffic that was going through no-ip.com domains.

njRAT malware analysis

ANY.RUN allows researchers to watch the njRAT in action in an interactive sandbox simulation.

njRAT execution process graph

Figure 1: Displays the lifecycle of njRAT in a visual form as a process graph generated by ANY.RUN malware hunting service

text report of the njRAT malware analysis

Figure 2: A customizable text report generated by ANY.RUN allows to take an even deeper look at the malware and helps to share the research results

njRAT execution process

In our simulation, after njRAT got into the target device and began execution it instantly started its malicious activity. Usually, the initial file renames itself and creates a child process. Sometimes njRAT trojan injects its code into legitimate processes such as RegSvcs.exe and RegAsm.exe.

The malware also has the ability to run itself through Task Scheduler. This child process executes the main malicious activity. Such activity includes stealing information, connecting to C2 servers, and changing the autorun value in the registry to run itself when the operating system starts.

Distribution of njRAT

njRAT trojan uses quite a few attack vectors to infect its victims. For example, the malware is known to target Discord users as part of spam campaigns. In addition, leverage cracks and keygens in well-known software in order to trick users. It installs malicious packages to infect the machine.

Another known distribution method was through a compromised website that tricked users into downloading a fake Adobe product update which in turn installed njRAT malware to the PC. Bladabindi was also featured in spam email campaigns. In this case, it was delivered to potential victims as a malicious attachment.

In October 2020 mailspam used the 'shipment tracking' theme, faking popular courier and postal services. Malicious packages contain attachments in Zip format with an encoded Visual Basic script (VBE) payload and components.

Moreover, crooks use cloud-based storage platforms more often. Attackers host malicious files there to deliver malicious software, and even use them as part of a command and control (C&C) architecture. That is why it's crucial to know general malware removal instructions and analyze viruses in a safe environment.

How to detect NJRAT using ANY.RUN?

To determine whether the sample under review is njRAT or not, you can take a look at the changes that it made in the registry. To do so, open the "Advanced details of process" of the malicious process and look at the "Registry changes" tab in the "Events" section. If a process has created a key with the name [kl] into the path HKEY_CURRENT_USER\Software\32_characters_and_digits, you can be sure that the given sample is njRAT.

njrat registry changes Figure 3: Сhanges made by njRAT in registry

Conclusion

The relative ease of operation, multiple tutorials on how to set up this malware, and very extensive information stealing feature set have made this RAT one of the most popular remote access trojans in the world.

Even though the peak of its activity was recorded in 2014 and targeted mostly the middle east and India, the njRAT trojan remains to be extremely popular today. This malware is known to have targeted both private and corporate victims and poses a lot of danger to internet users, especially considering that it can be delivered by packages to potential victims in several ways, and preventing infection is much harder in some cases than in others.

Even though Bladabindi malware creators have taken several steps to hinder the analysis, malware hunting services like ANY.RUN allows professionals to easily study njRAT malware samples or other RATs like Orcus RAT or WSHRAT and share the research results with the world to improve global cybersecurity.

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