Query: Sigma YAML for windows / process_creation
Matching passage: Sigma rule: Detects suspicious execution of rundll32, with specific calls to some DLLs with known LOLBIN functionalities. Logsource: windows / process_creation. Rule: title: Potentially Suspicious Rundll32 Activity id: e593cf51-88db-4ee1-b920-37e89012a3c9 status: test description: Detects suspicious execution of rundll32, with specific calls to some DLLs with known LOLBIN functionalities references: - http://www.hexacorn.com/blog/2017/05/01/running-programs-via-proxy-jumping-on-a-edr-bypass-trampoline/ - https://twitter.com/Hexacorn/status/885258886428725250 - https://gist.github.com/ryhanson/227229866af52e2d963cf941af135a52 - https://twitter.com/nas_bench/status/1433344116071583746 - https://twitter.com/eral4m/status/1479106975967240209 - https://twitter.com/eral4m/status/1479080793003671557 author: juju4, Jonhnathan Ribeiro, oscd.community, Nasreddine Bencherchali (Nextron Systems) date: 2019-01-16 modified: 2023-05-17 tags: - attack.stealth - attack.t1218.011 logsource: category: process_creation product: windows detection: selection: - CommandLine|contains|all: - 'javascript:' - .RegisterXLL - CommandLine|contains|all: - url.dll - OpenURL - CommandLine|contains|all: - url.dll - OpenURLA - CommandLine|contains|all: - url.dll - FileProtocolHandler - CommandLine|contains|all: - zipfldr.dll - RouteTheCall - CommandLine|contains|all: - shell32.dll - Control_RunDLL - CommandLine|contains|all: - shell32.dll - ShellExec_RunDLL - CommandLine|contains|all: - mshtml.dll - PrintHTML - CommandLine|contains|all: - advpack.dll - LaunchINFSection - CommandLine|contains|all: - advpack.dll - RegisterOCX - CommandLine|contains|all: - ieadvpack.dll - LaunchINFSection - CommandLine|contains|all: - ieadvpack.dll - RegisterOCX - CommandLine|contains|all: - ieframe.dll - OpenURL - CommandLine|contains|all: - shdocvw.dll - OpenURL - CommandLine|contains|all: - syssetup.dll - SetupInfObjectInstallAction - CommandLine|contains|all: - setupapi.dll - InstallHinfSection - CommandLine|contains|all: - pcwutl.dll - LaunchApplication - CommandLine|contains|all: - dfshim.dll - ShOpenVerbApplication - CommandLine|contains|all: - dfshim.dll - ShOpenVerbShortcut - CommandLine|contains|all: - scrobj.dll - GenerateTypeLib - http - CommandLine|contains|all: - shimgvw.dll - ImageView_Fullscreen - http - CommandLine|contains|all: - comsvcs.dll - MiniDump filter_main_screensaver: CommandLine|contains: shell32.dll,Control_RunDLL desk.cpl,screensaver,@screensaver filter_main_parent_cpl: ParentImage: C:\Windows\System32\control.exe ParentCommandLine|contains: .cpl CommandLine|contains|all: - Shell32.dll - Control_RunDLL - .cpl filter_main_startmenu: ParentImage:
Near-miss passage: Sigma rule: Identifies when DNS zone is modified or deleted.. Logsource: azure / activitylogs. Rule: title: Azure DNS Zone Modified or Deleted id: af6925b0-8826-47f1-9324-337507a0babd status: test description: Identifies when DNS zone is modified or deleted. references: - https://learn.microsoft.com/en-us/azure/role-based-access-control/resource-provider-operations#microsoftkubernetes author: Austin Songer @austinsonger date: 2021-08-08 modified: 2022-08-23 tags: - attack.impact - attack.t1565.001 logsource: product: azure service: activitylogs detection: selection: operationName|startswith: MICROSOFT.NETWORK/DNSZONES operationName|endswith: - /WRITE - /DELETE condition: selection falsepositives: - DNS zone modified and deleted may be performed by a system administrator. Verify whether the user identity, user agent, and/or hostname should be making changes in your environment. - DNS zone modification from unfamiliar users should be investigated. If known behavior is causing false positives, it can be exempted from the rule. level: medium