Quick Answer
The answer is launch daemon, as the .plist file located in /Library/LaunchDaemons/ with a ProgramArguments key pointing to a script in /tmp is the definitive signature of this persistence mechanism. LaunchDaemons are system-wide processes that run at boot with root privileges, and the plist defines the executable to launch, making any script in a transient directory like /tmp a clear indicator of malicious persistence. On the CHFI exam, this tests your ability to distinguish between user-level LaunchAgents (in ~/Library/) and system-level LaunchDaemons, a common trap where candidates confuse the two or overlook the /tmp path as a red flag for unauthorized code. Remember the mnemonic: "Daemon at boot, Agent at login" — if the plist is in /Library/LaunchDaemons/, it persists across reboots, not just user sessions.
This CHFI practice question tests your understanding of os and network forensics. Read the scenario carefully and evaluate each option against the stated constraints before committing to an answer. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.
A forensic analyst finds a suspicious .plist file in /Library/LaunchDaemons/ on a macOS system. The file contains a key "ProgramArguments" with a path to a script in /tmp. Which persistence mechanism does this indicate?
Cron job
Why wrong: Cron jobs are configured via crontab, not plist files in LaunchDaemons.
Launch daemon
LaunchDaemons plists in /Library/LaunchDaemons/ define system daemons that run as root at boot.
Login item
Why wrong: Login items are per-user, stored in ~/Library/Preferences/com.apple.loginitems.plist.
Kernel extension
Why wrong: Kernel extensions are .kext files, not plist files.
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
Launch daemon
LaunchDaemons are used for system-wide daemons that start at boot. A plist in /Library/LaunchDaemons/ with ProgramArguments indicates a launch daemon persistence mechanism.
Key principle: NAT direction and interface roles matter as much as the IP address mapping. Inside/outside designation controls which traffic is translated.
Answer analysis
For each option: why learners choose it and why it is or isn't the right answer here.
Cron job
Why it's wrong here
Cron jobs are configured via crontab, not plist files in LaunchDaemons.
Launch daemon
Why this is correct
LaunchDaemons plists in /Library/LaunchDaemons/ define system daemons that run as root at boot.
Related concept
Static NAT maps one inside address to one outside address.
Login item
Why it's wrong here
Login items are per-user, stored in ~/Library/Preferences/com.apple.loginitems.plist.
Kernel extension
Why it's wrong here
Kernel extensions are .kext files, not plist files.
Common exam traps
NAT is not only about the public address. The inside/outside interface roles and the ACL or rule that matches traffic are just as important.
Detailed technical explanation
NAT questions usually test address translation, overload/PAT behaviour, static mappings and whether the right traffic is being translated. Read the interface direction and address terms carefully.
Key takeaway
NAT direction and interface roles matter as much as the IP address mapping. Inside/outside designation controls which traffic is translated.
Real-world example
A small business has 20 workstations on the 192.168.1.0/24 network and one public IP from its ISP. The router uses PAT (NAT overload) so all 20 devices share one public address using different source ports. NAT questions test whether you understand the four address terms and which direction each translation applies.
What to study next
Review the four NAT address types (inside local, inside global, outside local, outside global), PAT port overload, and static vs dynamic NAT use cases. Then practise related CHFI NAT questions on configuration and troubleshooting.
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FAQ
OS and Network Forensics — This question tests OS and Network Forensics — Static NAT maps one inside address to one outside address..
The correct answer is: Launch daemon — LaunchDaemons are used for system-wide daemons that start at boot. A plist in /Library/LaunchDaemons/ with ProgramArguments indicates a launch daemon persistence mechanism.
Review the four NAT address types (inside local, inside global, outside local, outside global), PAT port overload, and static vs dynamic NAT use cases. Then practise related CHFI NAT questions on configuration and troubleshooting.
Static NAT maps one inside address to one outside address.
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Last reviewed: Jun 21, 2026
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