Njw0rm
Threat Scorecard
EnigmaSoft Threat Scorecard
EnigmaSoft Threat Scorecards are assessment reports for different malware threats which have been collected and analyzed by our research team. EnigmaSoft Threat Scorecards evaluate and rank threats using several metrics including real-world and potential risk factors, trends, frequency, prevalence, and persistence. EnigmaSoft Threat Scorecards are updated regularly based on our research data and metrics and are useful for a wide range of computer users, from end users seeking solutions to remove malware from their systems to security experts analyzing threats.
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Ranking: The ranking of a particular threat in EnigmaSoft’s Threat Database.
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See also Threat Assessment Criteria.
| Threat Level: | 50 % (Medium) |
| Infected Computers: | 60 |
| First Seen: | September 9, 2013 |
| Last Seen: | May 6, 2023 |
| OS(es) Affected: | Windows |
Njw0rm seems to be a variant of njRAT, a Remote Access Trojan/Tool (RAT) that has been used in various high profile attacks in the past. The Njw0rm variant adds various features to this threat that allow it to spread more effectively and avoid detection and removal better than its older sibling. It is clear that Njw0rm and njRAT were created by the same person, known by the alias njq8. Njw0rm spreads using removable memory devices (such as flash drives or SD cards) and is used to steal login credentials and other sensitive private data. Older variants of Njw0rm were usually categorized as backdoor Trojans with names such as Backdoor.LV. Njw0rm and its variants are associated with Command and Control servers located in the Middle East, and most of their intended targets are also in this region of the world.
Njw0rm's Dangerous Features and Build
Njw0rm includes most of the more common features observed in RAT infections. For example, Njw0rm may establish a backdoor on the infected computer, steal sensitive data, log keystrokes and allow a third party to control the infected computer from a remote location. However, Njw0rm has one specific feature that differentiates Njw0rm from previous variants: Njw0rm may spread using USB drives and other types of removable memory devices. Njw0rm may also spread through embedded links and attachments distributed through spam email messages. Njw0rm can be distributed through common malware distribution channels, including attack websites and social engineering scams. Njw0rm is written in Visual Basic and has the ability to open an unauthorized port on the infected computer to allow criminals to access the infected computer without alerting the victim.
One of Njw0rm's main features is its ability to steal passwords. Njw0rm may steal FTP passwords by analyzing application data. Njw0rm may also steal passwords stored in your Web browser, Google Chrome in particular. Njw0rm also has the ability to read a registry key that allows Njw0rm to steal account credentials for the No-IP dynamic DNS service. This last feature is unique to the Njw0rm attack and is particularly troubling. This is because these particular credentials may allow an attacker to use this particular DNS service to spy on other computer systems in the affected computer's network. To spread from one computer to another, Njw0rm will constantly try to detect drives connected to the infected computer in order to drop copies of itself that may then be connected to another computer.
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