// question
A Linux host may have undergone automated data collection and compression right before sensitive information is exfiltrated. Using process execution logs, determine which archive file name was created when the tar utility was run with gzip compression.
Reference KQL answer and model-by-model comparison.
7af2b51e-ad1c-498c-aca8-d3290c19535a
question id
2/23
models correct
1
valid answer
9%
success rate
// reference answer
Human-validated correct answer for this question.
data.tar.gz
// model comparison
| Model | Answer | KQL query | Status | Tries | Time | Cost |
|---|---|---|---|---|---|---|
| gemini-2.5-flash-preview-04-17 | no answer | no query generated | fail | 5 | 0.00s | 0.0589 |
| gpt-35-turbo | FileName | DeviceProcessEvents
| where ProcessCommandLine contains 'tar'
| summarize min(ProcessCreationTime) by FileName
| join kind=inner (
DeviceProcessEvents
| where ProcessCommandLine contains 'gzip'
| summarize min(ProcessCreationTime) by FileName
) on FileName
| project FileName | fail | 2 | 5.95s | 0.0046 |
| gpt-4-turbo-2024-04-09 | no answer | no query generated | fail | 5 | 0.00s | 0.2266 |
| gpt-4.1 | no answer | no query generated | fail | 5 | 0.00s | 0.0396 |
| gpt-4.1-finetuned | no answer | no query generated | fail | 5 | 0.00s | 0.0479 |
| gpt-4.1-mini | no answer | no query generated | fail | 5 | 0.00s | 0.0081 |
| gpt-4.1-nano | no answer | no query generated | fail | 5 | 0.00s | 0.0015 |
| gpt-4o | no answer | no query generated | fail | 5 | 0.00s | 0.0482 |
| gpt-5-high | no answer | no query generated | fail | 5 | 0.00s | 0.2995 |
| gpt-5-mini-high | no answer | no query generated | fail | 5 | 0.00s | 0.0264 |
| gpt-5-mini-low | /root/data.tar.gz | // Find tar gzip archives from process execution logs union isfuzzy=true DeviceProcessEvents, DeviceEvents | where isnotempty(ProcessCommandLine) | where ProcessCommandLine matches regex @"(?i)\btar\b" // Require gzip usage or archive extension in the command line | where ProcessCommandLine matches regex @"(?i)(?:-\S*z\S*|--gzip|\.(?:tar\.gz|tgz))" // Try to extract an archive filename (handles common forms like archive.tar.gz, archive.tgz, archive.tar) | extend Archive = extract(@"(?i)([^\s]+\.(?:tar\.gz|tgz|tar))", 1, ProcessCommandLine) | extend Archive = tostring(Archive) | where isnotempty(Archive) | project TimeGenerated, DeviceName, DeviceId, AccountName, AccountDomain=AccountDomain, ProcessId, ProcessCommandLine, Archive, InitiatingProcessFileName, InitiatingProcessCommandLine | summarize FirstSeen=min(TimeGenerated), LastSeen=max(TimeGenerated), Count=count(), SampleCommandLine=any(ProcessCommandLine), SampleInitiatingProcess=any(InitiatingProcessFileName) by DeviceName, DeviceId, AccountName, AccountDomain, Archive | order by FirstSeen desc | pass | 2 | 33.51s | 0.0073 |
| gpt-5-mini-medium | no answer | no query generated | fail | 5 | 0.00s | 0.0150 |
| gpt-5-nano-high | no answer | no query generated | fail | 5 | 0.00s | 0.0089 |
| gpt-5-nano-medium | no answer | no query generated | fail | 5 | 0.00s | 0.0078 |
| grok-3-beta | no answer | no query generated | fail | 5 | 0.00s | 0.0982 |
| grok-3-mini-beta | no answer | no query generated | fail | 5 | 0.00s | 0.0074 |
| o1-high | no answer | no query generated | fail | 5 | 0.00s | 0.7451 |
| o1-low | no answer | no query generated | fail | 5 | 0.00s | 0.7671 |
| o3-high | no answer | no query generated | fail | 5 | 0.00s | 0.0836 |
| o3-mini-high | no answer | no query generated | fail | 5 | 0.00s | 0.0373 |
| o3-mini-low | no answer | no query generated | fail | 5 | 0.00s | 0.0357 |
| o4-mini-high | data.tar.gz | DeviceProcessEvents
| where FileName in ("tar", "gnutar")
// look for gzip compression (-z) and file flag (-f), flags may be combined
| where ProcessCommandLine matches regex @"\-[^\s]*z[^\s]*f"
// extract the argument immediately following -f
| extend Archive = extract(@"\-[^\s]*f\s+([^\s]+)", 1, ProcessCommandLine)
| where isnotempty(Archive)
// narrow to typical gzip archive extensions
| where Archive endswith ".tar.gz" or Archive endswith ".tgz"
| project TimeGenerated, DeviceName, AccountName = InitiatingProcessAccountName, ProcessCommandLine, Archive
| sort by TimeGenerated desc | pass | 2 | 45.06s | 0.0184 |
| o4-mini-low | no answer | no query generated | fail | 5 | 0.00s | 0.0386 |