Nasreddine Bencherchali
73 lines
3.4 KiB
YAML
73 lines
3.4 KiB
YAML
title: Suspicious Elevated System Shell
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id: 178e615d-e666-498b-9630-9ed363038101
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status: experimental
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description: Detects when a shell program such as the windows Command Prompt or PowerShell is launched with system privileges.
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references:
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- https://github.com/Wh04m1001/SysmonEoP
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author: frack113, Tim Shelton (update fp)
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date: 2022/12/05
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modified: 2023/01/03
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tags:
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- attack.privilege_escalation
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- attack.defense_evasion
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- attack.execution
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- attack.t1059
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logsource:
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product: windows
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category: process_creation
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detection:
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selection_shell:
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- Image|endswith:
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- '\powershell.exe'
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- '\pwsh.exe'
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- '\cmd.exe'
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- OriginalFileName:
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- 'PowerShell.EXE'
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- 'pwsh.dll'
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- 'Cmd.Exe'
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selection_user:
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User|contains: # covers many language settings
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- 'AUTHORI'
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- 'AUTORI'
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LogonId: '0x3e7'
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filter_compattelrunner:
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ParentImage: 'C:\Windows\System32\CompatTelRunner.exe'
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ParentCommandLine|contains: '-m:appraiser.dll -f:DoScheduledTelemetryRun'
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OriginalFileName: 'PowerShell.EXE'
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CommandLine|contains: '-ExecutionPolicy Restricted -Command Write-Host'
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filter_erl:
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# Example:
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# C:\Program Files\erl-23.2\erts-11.1.4\bin\erl.exe" -service_event ErlSrv_RabbitMQ -nohup -sname rabbit@localhost -s rabbit boot -boot start_sasl +W w +MBas ageffcbf +MHas ageffcbf +MBlmbcs 512 +MHlmbcs 512 +MMmcs 30 +P 1048576 +t 5000000 +stbt db +zdbbl 128000 +sbwt none +sbwtdcpu none +sbwtdio none -kernel inet_dist_listen_min 25672 -kernel inet_dist_listen_max 25672 -lager crash_log false -lager handlers []
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ParentImage|startswith: 'C:\Program Files\erl-'
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ParentImage|endswith: '\bin\erl.exe'
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filter_vmware:
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ParentImage: 'C:\Windows\System32\CompatTelRunner.exe'
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CommandLine|contains: 'get-vmswitch '
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filter_asgard:
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ParentImage: 'C:\Windows\System32\asgard2-agent\bin\generic.exe'
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CommandLine|contains|all:
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- ' -taskid '
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- ' -name asgard2-agent '
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filter_manageengine:
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# Example:
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# ParentImage: C:/ManageEngine/ADManager Plus/pgsql/bin/postgres.exe" --forkarch 5380
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# CommandLine: C:\Windows\system32\cmd.exe /c "IF EXIST archive.bat (archive.bat pg_wal\000000010000008E000000EA 000000010000008E000000EA)
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ParentImage: 'C:\ManageEngine\ADManager Plus\pgsql\bin\postgres.exe'
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Image|endswith: '\cmd.exe'
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filter_landesk:
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# Example:
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# ParentImage: C:\Program Files (x86)\LANDesk\LDCLient\sdistbat.exe
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# CommandLine: cmd.exe /c C:\Program Files "(x86)\LANDesk\LDCLient\\sdclient_temp.bat > C:\Program" Files (x86)\LANDesk\LDCLient\data\sd_2491.tmp
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ParentImage: 'C:\Program Files (x86)\LANDesk\LDClient\sdistbat.exe'
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Image|endswith: '\cmd.exe'
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filter_varonis:
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# Example:
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# ParentImage: C:\Program Files (x86)\Varonis\DatAdvantage\GridCollector\VrnsRealTimeAlertsSvc.exe" /appid 000000ad-cb03-500b-9459-c46d000000ad
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# CommandLine: C:\Windows\system32\cmd.exe /c C:\Program Files "(x86)\Varonis\DatAdvantage\GridCollector\handle_scopes.cmd C:\Collector" Working Share\VaronisWorkDirectoryCollector
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ParentImage: 'C:\Program Files (x86)\Varonis\DatAdvantage\GridCollector\VrnsRealTimeAlertsSvc.exe'
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Image|endswith: '\cmd.exe'
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condition: all of selection_* and not 1 of filter_*
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falsepositives:
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- Unknown
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level: high
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