During the eradication phase of a malware incident, a security analyst removes malicious files and cleans registry persistence. What is the MOST critical additional step to prevent reinfection through the same vector?
Trap 1: Running a full antivirus scan
Antivirus scan may not detect all root causes; patching is critical.
Trap 2: Resetting all user passwords
Password reset is important but does not address the technical vulnerability.
Trap 3: Reimaging the system with a clean OS
Reimaging is effective but may not be necessary if eradication is thorough; patching is key.
- A
Patching the vulnerability that was exploited
Correct. Without patching, the same vulnerability can be exploited again.
- B
Running a full antivirus scan
Why wrong: Antivirus scan may not detect all root causes; patching is critical.
- C
Resetting all user passwords
Why wrong: Password reset is important but does not address the technical vulnerability.
- D
Reimaging the system with a clean OS
Why wrong: Reimaging is effective but may not be necessary if eradication is thorough; patching is key.