Summary

Summary
Action
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| Detected by | All Sophos products |
|---|---|
- Free virus, spyware, and adware scan
- Test your existing anti-virus protection
- Find threats your anti-virus missed
Action

Summary
Action
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Please follow the instructions for removing Trojans.
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Troj/He4Hook-A is a driver component of Hacker Defender rootkit detected as variants of Troj/HacDef.
It will prevent detection of vaious malwares of the client computer. The existence of Troj/He4Hook-A signals a large probability that Troj/HacDef is installed on the infected machine. In many cases, Troj/He4Hook-A is dropped by Troj/HacDef located in a hidden directory.
Removal of Troj/He4Hook-A normally requires removing Troj/HacDef from the system first.
