NJRat
Posted: August 12, 2016
Threat Metric
The following fields listed on the Threat Meter containing a specific value, are explained in detail below:
Threat Level: The threat level scale goes from 1 to 10 where 10 is the highest level of severity and 1 is the lowest level of severity. Each specific level is relative to the threat's consistent assessed behaviors collected from SpyHunter's risk assessment model.
Detection Count: The collective number of confirmed and suspected cases of a particular malware threat. The detection count is calculated from infected PCs retrieved from diagnostic and scan log reports generated by SpyHunter.
Volume Count: Similar to the detection count, the Volume Count is specifically based on the number of confirmed and suspected threats infecting systems on a daily basis. High volume counts usually represent a popular threat but may or may not have infected a large number of systems. High detection count threats could lay dormant and have a low volume count. Criteria for Volume Count is relative to a daily detection count.
Trend Path: The Trend Path, utilizing an up arrow, down arrow or equal symbol, represents the level of recent movement of a particular threat. Up arrows represent an increase, down arrows represent a decline and the equal symbol represent no change to a threat's recent movement.
% Impact (Last 7 Days): This demonstrates a 7-day period change in the frequency of a malware threat infecting PCs. The percentage impact correlates directly to the current Trend Path to determine a rise or decline in the percentage.
| Ranking: | 1,495 |
|---|---|
| Threat Level: | 8/10 |
| Infected PCs: | 14,395 |
| First Seen: | August 12, 2016 |
|---|---|
| Last Seen: | October 17, 2023 |
| OS(es) Affected: | Windows |
NJRat is a Remote Access Trojan (RAT) whose primary purpose is to provide its operator with unsupervised access to the victim's computer. The threat is meant to run on the compromised host silently, and give the remote attacker the ability to spy on their victims, manage their files, and perform a long list of harmful and operations. The malware was first seen in 2013, and it was used in the Middle Eastern region predominantly – however, through the years it was adopted by hundreds of threat actors and used all around the world. One of the biggest surges of NJRat attacks occurred in 2014 when thousands of computers in India were infected by this threatening application.
The NJRat also has served as a foundation for the development of other malware families and various cyber threats:
- Lime Ransomware – a file-locker that also installed the NJRat on the victim's computer.
- Njw0rm – an extended NJRat variant that packed additional features, and has the ability to copy its files to USB drives and removable storage connected to the infected host.
Since the server builder and client components of the NJRat have become public, and threat actor can make use of them and opt to reach their targets by using various propagation channels and social engineering tricks. Copies of the NJRat may often be hosted on torrent trackers, posing as software keygens, game cracks or other pirated content. More sophisticated threat actors have been seen spreading copies of the NJRat via corrupted links posted on Discord servers, fake social media profiles/conversations, and bogus email attachments.
Some of the NJRat's core features are:
- Establish a remote desktop connection to the infected host.
- Silently browse the victim's files and directories.
- Access the victim's Web camera or microphone and use them for recordings.
- Modify the Windows Registry, Task Manager and Windows Services.
- Launch a keylogger.
- Collect saved passwords (browser, FTP, messaging applications, etc.).
- Access websites or download files from the Web.
Protecting your computer from the NJRat and the threat actors who use it can be achieved by following the best safe browsing practices. Never download pirated movies or media, avoid torrent trackers, and do not mess around with software or game cracks. Naturally, only trust files coming from reputable sources and websites, and make sure to double-check the source's credibility – cybercriminals can spoof email addresses or use bogus domains to trick you into trusting the wrong source. Last but not least, make sure to have your system protected by a regularly updated anti-virus software suite.
Technical Details
File System Modifications
Tutorials: If you wish to learn how to remove malware components manually, you can read the tutorials on how to find malware, kill unwanted processes, remove malicious DLLs and delete other harmful files. Always be sure to back up your PC before making any changes.
The following files were created in the system:%SYSTEMDRIVE%\Users\<username>\Desktop\Njrat\Plugin\pw.dll
File name: pw.dllSize: 39.93 KB (39936 bytes)
MD5: db87daf76c15f3808cec149f639aa64f
Detection count: 1,953
File type: Dynamic link library
Mime Type: unknown/dll
Path: %SYSTEMDRIVE%\Users\<username>\Desktop\Njrat\Plugin\pw.dll
Group: Malware file
Last Updated: October 11, 2023
%SYSTEMDRIVE%\Users\<username>\AppData\Roaming\Mono.Cecil.dll
File name: Mono.Cecil.dllSize: 312.32 KB (312320 bytes)
MD5: 851ec9d84343fbd089520d420348a902
Detection count: 230
File type: Dynamic link library
Mime Type: unknown/dll
Path: %SYSTEMDRIVE%\Users\<username>\AppData\Roaming\Mono.Cecil.dll
Group: Malware file
Last Updated: October 16, 2023
file.exe
File name: file.exeSize: 404.53 KB (404538 bytes)
MD5: 69453f86115bf0ad1c718e5ec9253a70
Detection count: 90
File type: Executable File
Mime Type: unknown/exe
Group: Malware file
file.exe
File name: file.exeSize: 160.25 KB (160256 bytes)
MD5: a78b8d72a78767f92e9d93cdc995d9ae
Detection count: 75
File type: Executable File
Mime Type: unknown/exe
Group: Malware file
Last Updated: August 12, 2016
file.exe
File name: file.exeSize: 1.62 MB (1629726 bytes)
MD5: 1e6e5b00496d3c6629568fef18ceb5a0
Detection count: 74
File type: Executable File
Mime Type: unknown/exe
Group: Malware file
Last Updated: January 21, 2017
4bbc15dba26f9d7ae8c2e3ec8a63dd4d
File name: 4bbc15dba26f9d7ae8c2e3ec8a63dd4dSize: 50.68 KB (50688 bytes)
MD5: 4bbc15dba26f9d7ae8c2e3ec8a63dd4d
Detection count: 73
Group: Malware file
2a4b142a5249f32d552712bf01d18f23
File name: 2a4b142a5249f32d552712bf01d18f23Size: 53.24 KB (53248 bytes)
MD5: 2a4b142a5249f32d552712bf01d18f23
Detection count: 70
Group: Malware file
file.exe
File name: file.exeSize: 94.72 KB (94720 bytes)
MD5: de08894d497e63ef412a144274166ea4
Detection count: 33
File type: Executable File
Mime Type: unknown/exe
Group: Malware file
Last Updated: June 7, 2017
file.exe
File name: file.exeSize: 1.12 MB (1125784 bytes)
MD5: cd312c275495e39ca7d9b186e146dd62
Detection count: 14
File type: Executable File
Mime Type: unknown/exe
Group: Malware file
Last Updated: October 6, 2016
file.exe
File name: file.exeSize: 609.28 KB (609280 bytes)
MD5: a9f81658b17624154c7936935b3bb6b1
Detection count: 14
File type: Executable File
Mime Type: unknown/exe
Group: Malware file
Registry Modifications
File name without pathnjw0rm.exeVIP Script.exeRegexp file mask%APPDATA%\server.exe%appdata%\SyCom.exe%TEMP%\Console Window Host.exe%WINDIR%\System32\Tasks\NYAN
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