Query: detect Detect when System Manager successfully executes commands against an instance. in logs
Matching passage: Sigma rule: Detect when System Manager successfully executes commands against an instance.. Logsource: aws / cloudtrail. Rule: title: Potential Malicious Usage of CloudTrail System Manager id: 38e7f511-3f74-41d4-836e-f57dfa18eead status: test description: 'Detect when System Manager successfully executes commands against an instance. ' references: - https://github.com/elastic/detection-rules/blob/v8.6.0/rules/integrations/aws/initial_access_via_system_manager.toml author: jamesc-grafana date: 2024-07-11 modified: 2025-12-08 tags: - attack.privilege-escalation - attack.initial-access - attack.t1566 - attack.t1566.002 logsource: product: aws service: cloudtrail detection: selection_event: eventName: SendCommand eventSource: ssm.amazonaws.com selection_status_success: errorCode: Success selection_status_null: errorCode: null condition: selection_event and 1 of selection_status_* falsepositives: - There are legitimate uses of SSM to send commands to EC2 instances - Legitimate users may have to use SSM to perform actions against machines in the Cloud to update or maintain them level: high
Near-miss passage: Sigma rule: Detects attackers using tooling with bad opsec defaults. E.g. spawning a sacrificial process to inject a capability into. Logsource: windows / process_creation. Rule: title: Bad Opsec Defaults Sacrificial Processes With Improper Arguments id: a7c3d773-caef-227e-a7e7-c2f13c622329 related: - id: f5647edc-a7bf-4737-ab50-ef8c60dc3add type: obsolete status: test description: 'Detects attackers using tooling with bad opsec defaults. E.g. spawning a sacrificial process to inject a capability into the process without taking into account how the process is normally run. One trivial example of this is using rundll32.exe without arguments as a sacrificial process (default in CS, now highlighted by c2lint), running WerFault without arguments (Kraken - credit am0nsec), and other examples. ' references: - https://blog.malwarebytes.com/malwarebytes-news/2020/10/kraken-attack-abuses-wer-service/ - https://www.cobaltstrike.com/help-opsec - https://twitter.com/CyberRaiju/status/1251492025678983169 - https://learn.microsoft.com/en-us/windows-server/administration/windows-commands/regsvr32 - https://learn.microsoft.com/en-us/windows-server/administration/windows-commands/rundll32 - https://learn.microsoft.com/en-us/dotnet/framework/tools/regasm-exe-assembly-registration-tool - https://learn.microsoft.com/en-us/dotnet/framework/tools/regsvcs-exe-net-services-installation-tool author: Oleg Kolesnikov @securonix invrep_de, oscd.community, Florian Roth (Nextron Systems), Christian Burkard (Nextron Systems) date: 2020-10-23 modified: 2024-08-15 tags: - attack.stealth - attack.t1218.011 logsource: category: process_creation product: windows detection: selection_werfault: Image|endswith: \WerFault.exe CommandLine|endswith: WerFault.exe selection_rundll32: Image|endswith: \rundll32.exe CommandLine|endswith: rundll32.exe selection_regsvcs: Image|endswith: \regsvcs.exe CommandLine|endswith: regsvcs.exe selection_regasm: Image|endswith: \regasm.exe CommandLine|endswith: regasm.exe selection_regsvr32: Image|endswith: \regsvr32.exe CommandLine|endswith: regsvr32.exe filter_optional_edge_update: ParentImage|contains: \AppData\Local\Microsoft\EdgeUpdate\Install\{ Image|endswith: \rundll32.exe CommandLine|endswith: rundll32.exe filter_optional_chromium_installer: ParentImage|contains: - \AppData\Local\BraveSoftware\Brave-Browser\Application\ - \AppData\Local\Google\Chrome\Application\ ParentImage|endswith: \Installer\setup.exe ParentCommandLine|contains: '--uninstall ' Image|endswith: \rundll32.exe CommandLine|endswith: rundll32.exe condition: 1 of selection_* and not 1 of filter_optional_* falsepositives: - Unlikely level: high