BOO/Whistler.A
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.
EnigmaSoft Threat Scorecards display a variety of useful information, including:
Ranking: The ranking of a particular threat in EnigmaSoft’s Threat Database.
Severity Level: The determined severity level of an object, represented numerically, based on our risk modeling process and research, as explained in our Threat Assessment Criteria.
Infected Computers: The number of confirmed and suspected cases of a particular threat detected on infected computers as reported by SpyHunter.
See also Threat Assessment Criteria.
| Ranking: | 16,343 |
| Threat Level: | 50 % (Medium) |
| Infected Computers: | 9 |
| First Seen: | October 31, 2011 |
| Last Seen: | August 27, 2023 |
| OS(es) Affected: | Windows |
BOO/Whistler.A is one of the components of the Whistler Bootkit, an extremely dangerous malware infection. BOO/Whistler.A, in particular, can be classified as a worm, since BOO/Whistler.A can replicate and spread by itself through a network. The Whistler Bootkit consists of several different malware infections which work together to attack the victim's system and to hide this infection, in order to control the infected computer effectively. The BOO/Whistler.A worm can attack all versions of the Windows operating system, from Windows XP up to Windows 7 and Windows Server 2008. The bootkit associated with BOO/Whistler.A will have the NT-AUTHORITY\SYSTEM rights every time the operating system starts up, making BOO/Whistler.A extremely difficult to eliminate. A BOO/Whistler.A infection will usually result in a hacker gaining complete control over the infected machine. According to ESG PC security researchers, it is not uncommon for a compromised machine to remain infected indefinitely, without showing symptoms that it is being controlled from afar. Many anti-malware applications have problems eliminating BOO/Whistler.A and the Whistler Bootkit. Manual removal is also difficult, due to the extremely large number of copies of itself that the BOO/Whistler.A worm can make on a computer. It is because of this that ESG security researchers recommend using a reliable, strong, and fully up-to-date anti-malware tool. It is important to make sure that the malware tool of your choice has the capacity to remove rootkits and bootkits associated with the BOO/Whistler.A worm.
Why the BOO/Whistler.A Worm is Particularly Dangerous
Many malware infections will wreak havoc on your computer system. Most rogue security applications will pester you with constant fake security alerts and error messages. Adware is usually designed to display pop-up windows containing advertisements at all times. A ransomware will literally paralyze your computer, until you agree to pay a certain amount. Most Trojan and virus infections will also cause the victim's computer to run slowly and to become unstable. Malware may also affect your Internet connection speed or even hide or delete your files. While there is no question that all of these effects are malignant, it is important to realize that a malware that has overt symptoms is usually relatively easier to detect. One of the most dangerous aspects of the BOO/Whistler.A and its associated bootkit is the fact that an infected computer system will show no symptoms of an infection. This means that a hacker may have access to your computer for years without realizing that there is anything wrong on your system. This unauthorized access can be used to steal your personal information, gain access to your online accounts or use your computer to perform illegal acts, such as sending out spam email or performing DDoS attacks.
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