200-201 Host-Based Analysis Practice Question
An analyst is examining a PE file and notices that the 'TimeDateStamp' in the optional header is 0x00000000. What does this suggest?
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
The timestamp has been deliberately erased or not set, possibly to avoid forensic analysis.
A timestamp of zero often indicates the linker did not set it, which is common for malware or files compiled with certain tools that omit the timestamp.
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 timestamp has been deliberately erased or not set, possibly to avoid forensic analysis.
Why this is correct
A zero TimeDateStamp means the PE compiler timestamp was never written or was overwritten. Legitimate builds normally carry a real compilation time, so this absence suggests deliberate erasure to hinder timeline correlation during forensic analysis.
- ✗
The file is digitally signed.
Why it's wrong here
A zero TimeDateStamp reflects a stripped or deliberately cleared compile timestamp, common in malware and reproducible builds; it says nothing about Authenticode signing, which lives in the certificate table. Signing is the tempting association because signed binaries are trusted, but the two fields are unrelated.
- ✗
The file was compiled on January 1, 1970 (Unix epoch).
Why it's wrong here
Zero means the timestamp was cleared or omitted, not that compilation occurred at the Unix epoch; a genuine 1 January 1970 build would encode 0x00000000 only coincidentally, and toolchains rarely produce it. Epoch conversion is tempting because zero maps to that date, but the field is deliberately blanked.
- ✗
The file is a DLL rather than an executable.
Why it's wrong here
The optional header's TimeDateStamp records compilation time and is present in both DLLs and EXEs, so a zero value cannot distinguish the file type; the Characteristics field's IMAGE_FILE_DLL flag does that. Analysts often expect DLLs to lack timestamps, but the format makes no such distinction.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This 200-201 practice question is part of Courseiva's free Cisco certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the 200-201 exam.