NjRAT enumerates the current user during the initial infection. NjRAT enumerates the victim operating system and computer name during the initial infection. NjRAT can capture screenshots of the victim’s machines. NjRAT can be configured to spread via removable drives. NjRAT can identify remote hosts on connected networks. NjRAT has a module for performing remote desktop access. NjRAT can search a list of running processes for Tr.exe. njRAT can also detect any removable drives connected to the system. NjRAT will attempt to detect if the victim system has a camera during the initial infection. NjRAT has used AutoIt to compile the payload and main script into a single executable after delivery. NjRAT has included a base64 encoded executable. NjRAT has used port 1177 for HTTP C2 communications. NjRAT has used the ShellExecute() function within a script. NjRAT can create, delete, or modify a specified Registry key or value.
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NjRAT can download files to the victim’s machine. NjRAT is capable of deleting objects related to itself (registry keys, files, and firewall rules) on the victim.
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NjRAT has modified the Windows firewall to allow itself to communicate through the firewall. Impair Defenses: Disable or Modify System Firewall Hng dn s dng DarkComet RAT, Cybergate RAT, njRAT Cho cc bn, mnh s gii thiu vi cc bn DarkComet RAT: mt loi trojan cc mnh vi kh nhiu la chn th v. NjRAT can browse file systems using a file manager module. NjRAT has used HTTP to receive stolen information from the infected machine. NjRAT has used a fast flux DNS for C2 IP resolution. NjRAT can collect data from a local system. NjRAT uses Base64 encoding for C2 traffic. NjRAT has a module that steals passwords saved in victim web browsers.
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Ĭredentials from Password Stores: Credentials from Web Browsers NjRAT can launch a command shell interface for executing commands. Ĭommand and Scripting Interpreter: Windows Command Shell NjRAT has executed PowerShell commands via auto-run registry key persistence.
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Ĭommand and Scripting Interpreter: PowerShell NjRAT has added persistence via the Registry key HKCU\Software\Microsoft\CurrentVersion\Run\ and dropped a shortcut in %STARTUP%. īoot or Logon Autostart Execution: Registry Run Keys / Startup Folder
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NjRAT gathers information about opened windows during the initial infection. NjRAT has used HTTP for C2 communications. So adding "& payload exists" may make the detection more effective.Enterprise Layer download view Techniques Used DomainĪpplication Layer Protocol: Web Protocols Advanced users may want to look for only established communications with payload. However, many of the destinations that these trojans are intended to communicate with look to have been shut down, and while the endpoint is trojanized, it is unable to connect to its parent server, resulting in just syn connection attempts. Since this traffic is usually on the default TCP destination port of 1177, and the service type shows up as UNKNOWN or Service Type 0, a very simple rule would be: The next system involves a screen capture of the local desktop. The connections always begin with an "lv" and the next string shows that the victim host has been enumerated of its unique identifier, logged in user, Operating System and more. The FirstWatch team has developed a lightweight detection for this with a very simple rule.įirst, this is what the payload of njRAT looks like: This malware is also known as Bladabindi and has been used by cybercriminals since at least 2015. However, this trojan kit is widely available for download, and its ease of use has made this trojan pretty popular. The script performed basic reconnaissance on the infected host, and then tried to download and run the patch.exe file ( file on VirusTotal ), which later installed the njRAT Trojan on the affected machine. The "njRAT" Remote Access Trojan is a popular password stealing remote control applet used mostly by threat actors in the Middle East.