The answer is that the server is infected with malware beaconing to a command-and-control server. This is the most likely explanation because svchost.exe running from C:\Windows\Temp is a classic masquerading technique—malware adopts the name of a legitimate Windows process but executes from a non-standard location, as the real svchost.exe resides in C:\Windows\System32. The regular outbound connections on port 443 at fixed intervals are a hallmark of beaconing, where compromised hosts phone home to receive instructions or exfiltrate data, often hiding in HTTPS traffic to evade detection. On the Computer Hacking Forensic Investigator CHFI exam, this scenario tests your ability to correlate process anomalies with network behavior, a core skill in host-based and network forensics. A common trap is assuming any svchost.exe is safe; remember that location is the giveaway. Memory tip: “If svchost is in Temp, treat it as a threat.”
CHFI OS and Network Forensics Practice Question
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.
During a network forensic investigation, the analyst examines firewall logs and notices a large number of outbound connections from an internal server to various IP addresses on port 443 at regular intervals. The connections are all initiated by a process called 'svchost.exe' running from a non-standard location (C:\Windows\Temp). What is the MOST likely explanation?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue: "most likely"
Why it matters: Probability qualifier — the question wants the most probable cause or outcome, not a guaranteed one. Eliminate low-probability options.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
The server is infected with malware that is beaconing to a command-and-control server
svchost.exe from C:\Windows\Temp indicates a masquerading technique where malware names itself after a legitimate Windows process but runs from an unauthorized location. The outbound connections on port 443 are likely command-and-control (C2) traffic.
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
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
✗
The server is running a scheduled backup to an external cloud service
Why it's wrong here
Backup processes would not typically use svchost.exe and would have a legitimate executable path.
✗
The server is performing legitimate Windows Update checks
Why it's wrong here
Windows Update uses svchost.exe from System32, not Temp. Also, it connects to Microsoft servers, not random IPs.
✓
The server is infected with malware that is beaconing to a command-and-control server
Why this is correct
The non-standard path and regular outbound connections are classic indicators of C2 beaconing.
Clue confirmation
The clue word "most likely" in the question point toward this answer.
Related concept
Static NAT maps one inside address to one outside address.
✗
The server is being used as a proxy for internal users
Why it's wrong here
A proxy service would run as a dedicated process, not as svchost.exe from Temp.
Common exam traps
Common exam trap: NAT rules depend on direction and matching traffic
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
How to think about this question
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.
KKey Concepts to Remember
Static NAT maps one inside address to one outside address.
PAT allows many inside hosts to share one public address using ports.
Inside local and inside global describe the private and translated addresses.
NAT ACLs identify traffic for translation, not always security filtering.
TExam Day Tips
→Identify inside and outside interfaces first.
→Check whether the scenario needs static NAT, dynamic NAT or PAT.
→Do not confuse NAT matching ACLs with normal packet-filtering intent.
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
How this comes up in practice
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.
Related glossary terms
Concepts from this question explained
These glossary pages explain the core terms tested in this CHFI question in full detail.
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.
OS and Network Forensics — This question tests OS and Network Forensics — Static NAT maps one inside address to one outside address..
What is the correct answer to this question?
The correct answer is: The server is infected with malware that is beaconing to a command-and-control server — svchost.exe from C:\Windows\Temp indicates a masquerading technique where malware names itself after a legitimate Windows process but runs from an unauthorized location. The outbound connections on port 443 are likely command-and-control (C2) traffic.
What should I do if I get this CHFI question wrong?
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.
Are there clue words in this question I should notice?
Yes — watch for: "most likely". Probability qualifier — the question wants the most probable cause or outcome, not a guaranteed one. Eliminate low-probability options.
What is the key concept behind this question?
Static NAT maps one inside address to one outside address.
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