Query: detect Detects file access requests to the the Windows Data Protection API Master keys by an uncommon application. This can be in logs
Matching passage: Sigma rule: Detects file access requests to the the Windows Data Protection API Master keys by an uncommon application. This can be. Logsource: windows / file_access. Rule: title: Access To Windows DPAPI Master Keys By Uncommon Applications id: 46612ae6-86be-4802-bc07-39b59feb1309 status: test description: 'Detects file access requests to the the Windows Data Protection API Master keys by an uncommon application. This can be a sign of credential stealing. Example case would be usage of mimikatz "dpapi::masterkey" function ' references: - http://blog.harmj0y.net/redteaming/operational-guidance-for-offensive-user-dpapi-abuse/ - https://book.hacktricks.xyz/windows-hardening/windows-local-privilege-escalation/dpapi-extracting-passwords author: Nasreddine Bencherchali (Nextron Systems) date: 2022-10-17 modified: 2026-07-28 tags: - attack.credential-access - attack.t1555.004 logsource: category: file_access product: windows definition: 'Requirements: Microsoft-Windows-Kernel-File ETW provider' detection: selection: FileName|contains: - \Microsoft\Protect\S-1-5-18\ - \Microsoft\Protect\S-1-5-21- filter_main_system_folders: Image|startswith: - C:\Program Files\ - C:\Program Files (x86)\ - C:\Windows\system32\ - C:\Windows\SysWOW64\ filter_main_explorer: Image: C:\Windows\explorer.exe condition: selection and not 1 of filter_main_* falsepositives: - Unknown level: medium
Near-miss passage: Sigma rule: Detects suspicious child processes spawned from browsers. This could be a result of a potential web browser exploitation. Logsource: macos / process_creation. Rule: title: Suspicious Browser Child Process - MacOS id: 0250638a-2b28-4541-86fc-ea4c558fa0c6 status: test description: Detects suspicious child processes spawned from browsers. This could be a result of a potential web browser exploitation. references: - https://fr.slideshare.net/codeblue_jp/cb19-recent-apt-attack-on-crypto-exchange-employees-by-heungsoo-kang - https://github.com/elastic/detection-rules/blob/4312d8c9583be524578a14fe6295c3370b9a9307/rules/macos/execution_initial_access_suspicious_browser_childproc.toml author: Sohan G (D4rkCiph3r) date: 2023-04-05 tags: - attack.initial-access - attack.execution - attack.t1189 - attack.t1203 - attack.t1059 logsource: category: process_creation product: macos detection: selection: ParentImage|contains: - com.apple.WebKit.WebContent - firefox - Google Chrome Helper - Google Chrome - Microsoft Edge - Opera - Safari - Tor Browser Image|endswith: - /bash - /curl - /dash - /ksh - /osascript - /perl - /php - /pwsh - /python - /sh - /tcsh - /wget - /zsh filter_main_generic: CommandLine|contains: --defaults-torrc filter_main_ms_autoupdate: CommandLine|contains: /Library/Application Support/Microsoft/MAU*/Microsoft AutoUpdate.app/Contents/MacOS/msupdate filter_main_chrome: ParentImage|contains: - Google Chrome Helper - Google Chrome CommandLine|contains: - /Volumes/Google Chrome/Google Chrome.app/Contents/Frameworks/*/Resources/install.sh - /Applications/Google Chrome.app/Contents/Frameworks/Google Chrome Framework.framework/*/Resources/keystone_promote_preflight.sh - /Applications/Google Chrome.app/Contents/Frameworks/Google Chrome Framework.framework/*/Resources/keystone_promote_postflight.sh filter_main_ms_edge: ParentImage|contains: Microsoft Edge CommandLine|contains: - IOPlatformExpertDevice - hw.model filter_main_chromerecovery: ParentImage|contains: - Google Chrome Helper - Google Chrome CommandLine|contains|all: - /Users/ - /Library/Application Support/Google/Chrome/recovery/ - /ChromeRecovery filter_optional_null: CommandLine: null filter_optional_empty: CommandLine: '' condition: selection and not 1 of filter_main_* and not 1 of filter_optional_* falsepositives: - Legitimate browser install, update and recovery scripts level: medium