Query: detect Detects the creation of an "Active Directory Schema Cache File" (.sch) file by an uncommon tool. in logs
Matching passage: Sigma rule: Detects the creation of an "Active Directory Schema Cache File" (.sch) file by an uncommon tool.. Logsource: windows / file_event. Rule: title: ADSI-Cache File Creation By Uncommon Tool id: 75bf09fa-1dd7-4d18-9af9-dd9e492562eb status: test description: Detects the creation of an "Active Directory Schema Cache File" (.sch) file by an uncommon tool. references: - https://medium.com/@ivecodoe/detecting-ldapfragger-a-newly-released-cobalt-strike-beacon-using-ldap-for-c2-communication-c274a7f00961 - https://blog.fox-it.com/2020/03/19/ldapfragger-command-and-control-over-ldap-attributes/ - https://github.com/fox-it/LDAPFragger author: xknow @xknow_infosec, Tim Shelton date: 2019-03-24 modified: 2023-10-18 tags: - attack.t1001.003 - attack.command-and-control logsource: product: windows category: file_event detection: selection: TargetFilename|contains: \Local\Microsoft\Windows\SchCache\ TargetFilename|endswith: .sch filter_main_generic: - Image|endswith: - :\Program Files\Cylance\Desktop\CylanceSvc.exe - :\Windows\CCM\CcmExec.exe - :\windows\system32\dllhost.exe - :\Windows\system32\dsac.exe - :\Windows\system32\efsui.exe - :\windows\system32\mmc.exe - :\windows\system32\svchost.exe - :\Windows\System32\wbem\WmiPrvSE.exe - :\windows\system32\WindowsPowerShell\v1.0\powershell.exe - Image|contains: - :\Windows\ccmsetup\autoupgrade\ccmsetup - :\Program Files\SentinelOne\Sentinel Agent filter_main_office: Image|contains|all: - :\Program Files\ - \Microsoft Office Image|endswith: \OUTLOOK.EXE filter_optional_ldapwhoami: Image|endswith: \LANDesk\LDCLient\ldapwhoami.exe filter_optional_citrix: Image|endswith: :\Program Files\Citrix\Receiver StoreFront\Services\DefaultDomainServices\Citrix.DeliveryServices.DomainServices.ServiceHost.exe condition: selection and not 1 of filter_main_* and not 1 of filter_optional_* falsepositives: - Other legimate tools, which do ADSI (LDAP) operations, e.g. any remoting activity by MMC, Powershell, Windows etc. level: medium
Near-miss passage: Sigma rule: Detects the execution of the LOLBIN gpscript, which executes logon or startup scripts configured in Group Policy. Logsource: windows / process_creation. Rule: title: Gpscript Execution id: 1e59c230-6670-45bf-83b0-98903780607e status: test description: Detects the execution of the LOLBIN gpscript, which executes logon or startup scripts configured in Group Policy references: - https://oddvar.moe/2018/04/27/gpscript-exe-another-lolbin-to-the-list/ - https://lolbas-project.github.io/lolbas/Binaries/Gpscript/ author: frack113 date: 2022-05-16 modified: 2023-06-14 tags: - attack.stealth - attack.t1218 logsource: product: windows category: process_creation detection: selection_img: - Image|endswith: \gpscript.exe - OriginalFileName: GPSCRIPT.EXE selection_cli: CommandLine|contains: - ' /logon' - ' /startup' filter_main_svchost: ParentCommandLine: C:\windows\system32\svchost.exe -k netsvcs -p -s gpsvc condition: all of selection_* and not 1 of filter_main_* falsepositives: - Legitimate uses of logon scripts distributed via group policy level: medium