Query: detect Detects execution of Microsoft bash launcher without any flags to execute the content of a bash script directly. This ca in logs
Matching passage: Sigma rule: Detects execution of Microsoft bash launcher without any flags to execute the content of a bash script directly. This ca. Logsource: windows / process_creation. Rule: title: Indirect Command Execution From Script File Via Bash.EXE id: 2d22a514-e024-4428-9dba-41505bd63a5b related: - id: 5edc2273-c26f-406c-83f3-f4d948e740dd type: similar status: test description: 'Detects execution of Microsoft bash launcher without any flags to execute the content of a bash script directly. This can be used to potentially bypass defenses and execute Linux or Windows-based binaries directly via bash. ' references: - https://lolbas-project.github.io/lolbas/Binaries/Bash/ - https://linux.die.net/man/1/bash - Internal Research author: Nasreddine Bencherchali (Nextron Systems) date: 2023-08-15 tags: - attack.stealth - attack.t1202 logsource: category: process_creation product: windows detection: selection: - Image|endswith: - :\Windows\System32\bash.exe - :\Windows\SysWOW64\bash.exe - OriginalFileName: Bash.exe filter_main_cli_flag: CommandLine|contains: - bash.exe - - bash - filter_main_no_cli: CommandLine: null filter_main_empty: CommandLine: '' filter_main_no_flag: CommandLine: - bash.exe - bash condition: selection and not 1 of filter_main_* falsepositives: - Unknown level: medium
Near-miss passage: Sigma rule: Detects the usage of "reg.exe" in order to dump sensitive registry hives. This includes SAM, SYSTEM and SECURITY hives.. Logsource: windows / process_creation. Rule: title: Dumping of Sensitive Hives Via Reg.EXE id: fd877b94-9bb5-4191-bb25-d79cbd93c167 related: - id: 038cd51c-3ad8-41c5-ba8f-5d1c92f3cc1e type: obsolete - id: 4d6c9da1-318b-4edf-bcea-b6c93fa98fd0 type: obsolete status: test description: Detects the usage of "reg.exe" in order to dump sensitive registry hives. This includes SAM, SYSTEM and SECURITY hives. references: - https://www.slideshare.net/heirhabarov/hunting-for-credentials-dumping-in-windows-environment - https://eqllib.readthedocs.io/en/latest/analytics/aed95fc6-5e3f-49dc-8b35-06508613f979.html - https://github.com/redcanaryco/atomic-red-team/blob/f339e7da7d05f6057fdfcdd3742bfcf365fee2a9/atomics/T1003/T1003.md - https://www.wietzebeukema.nl/blog/windows-command-line-obfuscation - https://github.com/redcanaryco/atomic-red-team/blob/f339e7da7d05f6057fdfcdd3742bfcf365fee2a9/atomics/T1003.002/T1003.002.md#atomic-test-1---registry-dump-of-sam-creds-and-secrets author: Teymur Kheirkhabarov, Endgame, JHasenbusch, Daniil Yugoslavskiy, oscd.community, frack113 date: 2019-10-22 modified: 2023-12-13 tags: - attack.credential-access - attack.t1003.002 - attack.t1003.004 - attack.t1003.005 - car.2013-07-001 logsource: category: process_creation product: windows detection: selection_img: - Image|endswith: \reg.exe - OriginalFileName: reg.exe selection_cli_flag: CommandLine|contains: - ' save ' - ' export ' - ' ˢave ' - ' eˣport ' selection_cli_hklm: CommandLine|contains: - hklm - hk˪m - hkey_local_machine - hkey_˪ocal_machine - hkey_loca˪_machine - hkey_˪oca˪_machine selection_cli_hive: CommandLine|contains: - \system - \sam - \security - \ˢystem - \syˢtem - \ˢyˢtem - \ˢam - \ˢecurity condition: all of selection_* falsepositives: - Dumping hives for legitimate purpouse i.e. backup or forensic investigation level: high