Trojan-SkyHook
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.
| Threat Level: | 90 % (High) |
| Infected Computers: | 3 |
| First Seen: | April 9, 2013 |
| Last Seen: | April 15, 2023 |
| OS(es) Affected: | Windows |
Trojan-SkyHook is a Trojan that sets UTF-8 BOM in ZIP Signature to bypass the detection by anti-virus programs. Trojan-SkyHook uses a simple phishing attack by making modifications to the hosts file on Windows systems. Trojan-SkyHook is packaged in a ZIP file together with a 0-byte 'readme.txt' file. Commonly, ZIP files that affect hacked PCs with Trojan-SkyHook are started with the ZIP signature 0x04034B50, or 'PK', 03, 04, but in this case, the makers chose to add the UTF-8 Byte Order Mark (BOM), introduced as 0xEFBBBF, before the ZIP header. Because the ZIP file is prefixed with the UTF-8 BOM, it tricks many software into supposing that the file is a UTF-8-encoded text file. For instance, when such a file is opened by Windows 7, the operating system regrets that such a ZIP file is invalid. Some third-party archive software, such as 7-Zip, WinRAR, and some others ignore the BOM and read the ZIP file appropriately.
File System Details
| # | File Name |
Detections
Detections: The number of confirmed and suspected cases of a particular threat detected on
infected computers as reported by SpyHunter.
|
|---|---|---|
| 1. | readme.txt |
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