Question Analysis
An attacker on a Linux host has attempted to turn off command history by modifying an environment variable. Using process execution logs, determine the exact shell command used to set HISTSIZE to zero.
386d3850-2ce7-4508-b56b-c0558922c814
Question ID
13/16
Models Correct
1
Valid Answer
81%
Success Rate
Reference Answer
Human-validated correct answer for this question
export HISTSIZE=0
Model Performance Comparison
See how different AI models performed on this question
| Model | Answer | KQL Query | Status | Attempts | Time | Cost |
|---|---|---|---|---|---|---|
| gemini-2.5-flash-preview-04-17 | export HISTSIZE=0 | DeviceProcessEvents
| where ProcessCommandLine contains "HISTSIZE=0"
| project TimeGenerated, DeviceName, ProcessCommandLine, AccountName | Correct | 1 | 7.58s | 0.0031 |
| gpt-35-turbo | No answer provided | No query generated | Incorrect | 5 | 0.00s | 0.0108 |
| gpt-4-turbo-2024-04-09 | No answer provided | No query generated | Incorrect | 5 | 0.00s | 0.2212 |
| gpt-4.1 | export HISTSIZE=0 | DeviceProcessEvents
| where ProcessCommandLine has "HISTSIZE=0"
| project TimeGenerated, DeviceName, AccountName, ProcessCommandLine | Correct | 1 | 5.59s | 0.0123 |
| gpt-4.1-finetuned | export HISTSIZE=0 | DeviceProcessEvents
| where TimeGenerated >= ago(30d)
| where ProcessCommandLine contains "HISTSIZE=0"
| Correct | 2 | 10.82s | 0.0330 |
| gpt-4.1-mini | export HISTSIZE=0 | DeviceProcessEvents
| where ProcessCommandLine has_cs "HISTSIZE=0"
| project Timestamp, DeviceName, AccountName, FileName, ProcessCommandLine
| order by Timestamp desc | Correct | 1 | 3.25s | 0.0024 |
| gpt-4.1-nano | No answer provided | No query generated | Incorrect | 5 | 0.00s | 0.0015 |
| gpt-4o | export HISTSIZE=0 | DeviceProcessEvents
| where ProcessCommandLine has "HISTSIZE=0"
| project TimeGenerated, DeviceName, AccountName, ProcessCommandLine | Correct | 1 | 2.99s | 0.0158 |
| grok-3-beta | export HISTSIZE=0 | DeviceProcessEvents
| where ProcessCommandLine contains 'HISTSIZE=0'
| project Timestamp, DeviceName, AccountName, ProcessCommandLine, FileName, FolderPath
| order by Timestamp desc | Correct | 1 | 7.36s | 0.0224 |
| grok-3-mini-beta | export HISTSIZE=0; | DeviceProcessEvents
| where ProcessCommandLine contains 'HISTSIZE=0'
| project TimeGenerated, DeviceName, AccountName, ProcessCommandLine
| order by TimeGenerated desc | Correct | 1 | 12.65s | 0.0017 |
| o1-high | export HISTSIZE=0 | DeviceProcessEvents
| where ProcessCommandLine has_any("export HISTSIZE=0", "HISTSIZE=0")
| project TimeGenerated, DeviceName, AccountName, ProcessCommandLine
| order by TimeGenerated desc | Correct | 1 | 40.12s | 0.3144 |
| o1-low | export HISTSIZE=0 | DeviceProcessEvents
| join kind=inner (DeviceInfo | where OSPlatform == "Linux") on DeviceId
| where ProcessCommandLine has "HISTSIZE=0"
| project TimeGenerated, DeviceName, AccountName, ProcessCommandLine, InitiatingProcessAccountName, FolderPath
| order by TimeGenerated desc | Correct | 1 | 45.66s | 0.3424 |
| o3-mini-high | export | DeviceProcessEvents
| where ProcessCommandLine contains "HISTSIZE=0"
| project TimeGenerated, DeviceName, AccountName, ProcessCommandLine, InitiatingProcessCommandLine
| order by TimeGenerated desc | Correct | 1 | 14.93s | 0.0118 |
| o3-mini-low | export HISTSIZE=0 | DeviceProcessEvents
| where ProcessCommandLine contains "HISTSIZE=0"
| project TimeGenerated, DeviceName, ProcessCommandLine | Correct | 1 | 92.77s | 0.0131 |
| o4-mini-high | export HISTSIZE=0 | DeviceProcessEvents
// Filter for HISTSIZE assignments of zero, optionally preceded by 'export'
| where ProcessCommandLine matches regex @"\b(?:export\s+)?HISTSIZE\s*=\s*0\b"
// Restrict to Linux devices
| join kind=inner (
DeviceInfo
| where OSPlatform == "Linux"
| distinct DeviceId
) on DeviceId
// Select and rename fields of interest
| project Timestamp = TimeGenerated,
DeviceName,
AccountName,
ProcessCommandLine,
ProcessId
// Sort chronologically
| sort by Timestamp asc | Correct | 4 | 154.36s | 0.0335 |
| o4-mini-low | export HISTSIZE=0 | DeviceProcessEvents
// (The time filter is applied by the calling context)
| join kind=inner (
DeviceInfo
| where OSPlatform == "Linux"
| project DeviceId
) on DeviceId
| where ProcessCommandLine matches regex @"(?i)\b(export\s+)?HISTSIZE\s*=\s*0\b"
| project TimeGenerated=Timestamp, DeviceName, AccountName, CommandLine=ProcessCommandLine
| sort by TimeGenerated desc | Correct | 2 | 111.05s | 0.0219 |