Question Analysis
A suspicious registry change was made on a Windows system modifying the Terminal Services DLL path. Investigate registry events to find out which DLL file name was set as the ServiceDll value under TermService. What was the file name?
18136e38-0530-49b2-b309-eed173787471
Question ID
12/16
Models Correct
1
Valid Answer
75%
Success Rate
Reference Answer
Human-validated correct answer for this question
AtomicTest.dll
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 | No answer provided | No query generated | Incorrect | 5 | 0.00s | 0.0219 |
| gpt-35-turbo | termsrv.dll | DeviceRegistryEvents
| where RegistryKey has 'TermService' and RegistryValueName has 'ServiceDll'
| project RegistryValueData | Incorrect | 2 | 5.31s | 0.0046 |
| gpt-4-turbo-2024-04-09 | AtomicTest.dll | DeviceRegistryEvents
| where RegistryKey contains "TermService" and RegistryValueName == "ServiceDll"
| project RegistryValueData | Correct | 1 | 8.25s | 0.0491 |
| gpt-4.1 | AtomicTest.dll | DeviceRegistryEvents
| where RegistryKey has "TermService" and RegistryValueName == "ServiceDll"
| project TimeGenerated, DeviceName, InitiatingProcessAccountName, RegistryKey, RegistryValueData, InitiatingProcessFileName, InitiatingProcessCommandLine
| order by TimeGenerated desc | Correct | 1 | 6.33s | 0.0123 |
| gpt-4.1-finetuned | AtomicTest.dll | DeviceRegistryEvents
| where ActionType =~ "RegistryValueSet"
| where RegistryKey has "Services\\TermService\\Parameters" and RegistryValueName =~ "ServiceDll"
| project RegistryKey, RegistryValueName, RegistryValueData | Correct | 2 | 22.53s | 0.0263 |
| gpt-4.1-mini | AtomicTest.dll | DeviceRegistryEvents
| where RegistryKey contains "TermService" and RegistryValueName == "ServiceDll"
| project DeviceName, TimeGenerated, RegistryKey, ServiceDllFileName = RegistryValueData
| order by TimeGenerated desc | Correct | 1 | 2.94s | 0.0022 |
| gpt-4.1-nano | termsrv.dll | DeviceRegistryEvents
| where RegistryKey has "TermService" and RegistryValueName == "ServiceDll"
| project TimeGenerated, DeviceName, RegistryKey, RegistryValueData
| take 10 | Incorrect | 1 | 2.78s | 0.0005 |
| gpt-4o | AtomicTest.dll | DeviceRegistryEvents
| where RegistryValueName == "ServiceDll" and RegistryKey contains "TermService"
| project TimeGenerated, DeviceName, RegistryKey, RegistryValueName, RegistryValueData, InitiatingProcessAccountName, InitiatingProcessAccountDomain, InitiatingProcessFileName | Correct | 2 | 5.25s | 0.0274 |
| grok-3-beta | AtomicTest.dll | DeviceRegistryEvents
| where RegistryKey contains "TermService"
| where RegistryValueName == "ServiceDll"
| extend FileName = extract("[^\\\\]*$", 0, RegistryValueData)
| summarize by FileName, DeviceName, InitiatingProcessFileName, Timestamp
| order by Timestamp desc | Correct | 1 | 10.76s | 0.0216 |
| grok-3-mini-beta | AtomicTest.dll | DeviceRegistryEvents
| where ActionType == 'RegistryValueSet' // Filter for set operations
| where RegistryKey contains 'TermService' // Target the relevant registry key
| where RegistryValueName == 'ServiceDll' // Focus on the specific value name
| project Timestamp, DeviceName, RegistryKey, RegistryValueName, RegistryValueData // Select relevant fields
| order by Timestamp desc // Sort by time for latest events
| take 10 // Limit to top 10 results for review | Correct | 1 | 19.51s | 0.0016 |
| o1-high | AtomicTest.dll | DeviceRegistryEvents
| where RegistryKey has "TermService"
| where RegistryValueName == "ServiceDll"
| order by TimeGenerated desc
| project TimeGenerated, DeviceName, RegistryKey, RegistryValueName, RegistryValueData | Correct | 1 | 26.53s | 0.1945 |
| o1-low | C:\Users\wipro\AtomicTest.dll | DeviceRegistryEvents
| where RegistryKey has "\\Services\\TermService\\Parameters" // or contains "TermService"
| where RegistryValueName == "ServiceDll"
| where ActionType in ("RegistryValueSet", "RegistryValueModified", "SetValue", "ValueNameAdded")
| project TimeGenerated, DeviceName, RegistryKey, RegistryValueName, RegistryValueData, PreviousRegistryValueData, InitiatingProcessAccountName, InitiatingProcessFileName, ActionType
| order by TimeGenerated desc | Correct | 1 | 26.96s | 0.2093 |
| o3-mini-high | AtomicTest.dll | DeviceRegistryEvents
| where RegistryKey contains "TermService" and RegistryValueName == "ServiceDll"
| extend DllFilePath = RegistryValueData
| extend DllFileName = extract(@"([^\\]+\.dll)$", 1, DllFilePath)
| project TimeGenerated, DeviceName, DllFileName, DllFilePath, InitiatingProcessAccountName, InitiatingProcessCommandLine
| sort by TimeGenerated desc | Correct | 1 | 88.59s | 0.0129 |
| o3-mini-low | AtomicTest.dll | DeviceRegistryEvents
| where RegistryKey contains "TermService" and RegistryValueName == "ServiceDll"
| extend DLLFileName = tostring(extract("([^\\\\]+\\.dll)$", 1, RegistryValueData))
| project TimeGenerated, DeviceName, RegistryKey, RegistryValueData, DLLFileName
| order by TimeGenerated desc | Correct | 3 | 20.01s | 0.0195 |
| o4-mini-high | AtomicTest.dll | DeviceRegistryEvents
| where RegistryKey endswith @"\Services\TermService\Parameters"
| where RegistryValueName == "ServiceDll"
| where ActionType == "RegistryValueSet"
| project TimeGenerated, DeviceName, InitiatingProcessAccountName, RegistryValueData
| extend DllFileName = tostring(split(RegistryValueData, "\\")[-1])
| distinct DllFileName | Correct | 1 | 32.93s | 0.0113 |
| o4-mini-low | No answer provided | No query generated | Incorrect | 5 | 0.00s | 0.0326 |