If you see the files Zer0.tar.gz and copy.tar.gz on a Linux system during an investigation, what can you conclude?

If you see the files Zer0.tar.gz and copy.tar.gz on a Linux system during an investigation, what can you conclude?

• A. The system files have been copied by a remote attacker
• B. The system administrator has created an incremental backup
• C. The system has been compromised using a t0rn rootkit
• D. Nothing in particular as these can be operational files

Answer: (D)

In digital forensics, simply finding two compressed tar archives on a Linux system does not by itself indicate anything malicious or definitive. Tar.gz files are a standard, everyday way to bundle and compress files for backups, transfers, or packaging. The names Zer0.tar.gz and copy.tar.gz could easily be legitimate backups or archives created by a system administrator or automated task, so their presence alone is not evidence of compromise, a specific backup action, or a rootkit. To draw any conclusion, you’d need to inspect details such as who created them, when they were created, where they were stored, and what is inside the archives (and corroborate with logs and baseline configurations). Without that additional evidence, the most accurate takeaway is that these files could be normal operational artifacts rather than indicators of a particular event.

In digital forensics, simply finding two compressed tar archives on a Linux system does not by itself indicate anything malicious or definitive. Tar.gz files are a standard, everyday way to bundle and compress files for backups, transfers, or packaging. The names Zer0.tar.gz and copy.tar.gz could easily be legitimate backups or archives created by a system administrator or automated task, so their presence alone is not evidence of compromise, a specific backup action, or a rootkit. To draw any conclusion, you’d need to inspect details such as who created them, when they were created, where they were stored, and what is inside the archives (and corroborate with logs and baseline configurations). Without that additional evidence, the most accurate takeaway is that these files could be normal operational artifacts rather than indicators of a particular event.