1type: trigger
2name: sigmahq/proc_creation_win_agentexecutor_susp_usage
3description: |
4  Detects execution of the AgentExecutor.exe binary. Which can be abused as a LOLBIN to execute powershell scripts with the ExecutionPolicy "Bypass" or any binary named "powershell.exe" located in the path provided by 6th positional argument
5filter: |
6  (evt.Meta.service == 'sysmon' && evt.Parsed.EventID == '1') && ((evt.Parsed.Image endsWith '\\AgentExecutor.exe' || evt.Parsed.OriginalFileName == 'AgentExecutor.exe') && (evt.Parsed.CommandLine contains ' -powershell' || evt.Parsed.CommandLine contains ' -remediationScript') && not (evt.Parsed.CommandLine contains 'C:\\Windows\\System32\\WindowsPowerShell\\v1.0\\' || evt.Parsed.CommandLine contains 'C:\\Windows\\SysWOW64\\WindowsPowerShell\\v1.0\\' || evt.Parsed.ParentImage endsWith '\\Microsoft.Management.Services.IntuneWindowsAgent.exe'))
7blackhole: 2m
8#status: test
9labels:
10  service: windows
11  confidence: 1
12  spoofable: 0
13  classification:
14   - attack.t1218
15
16  label: "Suspicious AgentExecutor PowerShell Execution"
17  behavior : "windows:audit"
18  remediation: false
19
20scope:
21  type: ParentProcessId
22  expression: evt.Parsed.ParentProcessId
23
24