Query: write Sigma for Detects attackers using tooling with bad opsec defaults. E.g. spawning a sacrificial process to inject a capability into
Matching 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
Near-miss passage: Sigma rule: Detects creation of a new service via "sc" command or the powershell "new-service" cmdlet with suspicious binary paths. Logsource: windows / process_creation. Rule: title: Suspicious New Service Creation id: 17a1be64-8d88-40bf-b5ff-a4f7a50ebcc8 related: - id: 7fe71fc9-de3b-432a-8d57-8c809efc10ab type: derived status: test description: Detects creation of a new service via "sc" command or the powershell "new-service" cmdlet with suspicious binary paths references: - https://github.com/redcanaryco/atomic-red-team/blob/f339e7da7d05f6057fdfcdd3742bfcf365fee2a9/atomics/T1543.003/T1543.003.md - https://web.archive.org/web/20180331144337/https://www.fireeye.com/blog/threat-research/2018/03/sanny-malware-delivery-method-updated-in-recently-observed-attacks.html author: Nasreddine Bencherchali (Nextron Systems) date: 2022-07-14 modified: 2022-11-18 tags: - attack.persistence - attack.privilege-escalation - attack.t1543.003 logsource: category: process_creation product: windows detection: selection_sc: Image|endswith: \sc.exe CommandLine|contains|all: - create - binPath= selection_posh: CommandLine|contains|all: - New-Service - -BinaryPathName susp_binpath: CommandLine|contains: - powershell - mshta - wscript - cscript - svchost - dllhost - 'cmd ' - cmd.exe /c - cmd.exe /k - cmd.exe /r - rundll32 - C:\Users\Public - \Downloads\ - \Desktop\ - \Microsoft\Windows\Start Menu\Programs\Startup\ - C:\Windows\TEMP\ - \AppData\Local\Temp condition: 1 of selection* and susp_binpath falsepositives: - Unlikely level: high