Query: Sigma rule for Detects usage of WinAPI functions in PowerShell scripts. It may indicate attempts to perform actions such as process inj
Matching passage: Sigma rule: Detects usage of WinAPI functions in PowerShell scripts. It may indicate attempts to perform actions such as process inj. Logsource: windows / ps_script. Rule: title: Potential WinAPI Calls Via PowerShell Scripts id: 03d83090-8cba-44a0-b02f-0b756a050306 related: - id: ba3f5c1b-6272-4119-9dbd-0bc8d21c2702 type: similar status: test description: 'Detects usage of WinAPI functions in PowerShell scripts. It may indicate attempts to perform actions such as process injection, token stealing, or other malicious activities that leverage Windows API calls. These techniques are commonly used to evade traditional file-based detections by loading and executing code directly in memory. ' references: - https://speakerdeck.com/heirhabarov/hunting-for-powershell-abuse - https://github.com/PowerShellMafia/PowerSploit/blob/1980f403ee78234eae4d93b50890d02f827a099f/CodeExecution/Invoke-Shellcode.ps1 - https://thedfirreport.com/2021/08/29/cobalt-strike-a-defenders-guide/ author: Nasreddine Bencherchali (Nextron Systems), Nikita Nazarov, oscd.community date: 2020-10-06 modified: 2026-04-29 tags: - attack.execution - attack.t1059.001 - attack.t1106 - attack.stealth - attack.t1620 logsource: product: windows category: ps_script definition: 'Requirements: Script Block Logging must be enabled' detection: selection_injection: ScriptBlockText|contains|all: - VirtualAlloc - OpenProcess - WriteProcessMemory - CreateRemoteThread selection_token_steal: ScriptBlockText|contains|all: - OpenProcessToken - LookupPrivilegeValue - AdjustTokenPrivileges selection_duplicate_token: ScriptBlockText|contains|all: - OpenProcessToken - DuplicateTokenEx - CloseHandle selection_process_write_read: ScriptBlockText|contains|all: - WriteProcessMemory - VirtualAlloc - ReadProcessMemory - VirtualFree selection_local_shellcode_injection: ScriptBlockText|contains|all: - VirtualAlloc - GetDelegateForFunctionPointer - Marshal.Copy condition: 1 of selection_* falsepositives: - Unknown level: high
Near-miss passage: Sigma rule: Detects findstring commands that include the keyword lsass, which indicates recon actviity for the LSASS process PID. Logsource: windows / process_creation. Rule: title: LSASS Process Reconnaissance Via Findstr.EXE id: fe63010f-8823-4864-a96b-a7b4a0f7b929 status: test description: Detects findstring commands that include the keyword lsass, which indicates recon actviity for the LSASS process PID references: - https://blog.talosintelligence.com/2022/08/recent-cyber-attack.html?m=1 author: Florian Roth (Nextron Systems) date: 2022-08-12 modified: 2024-06-04 tags: - attack.credential-access - attack.t1552.006 logsource: category: process_creation product: windows detection: selection_findstr_img: - Image|endswith: - \find.exe - \findstr.exe - OriginalFileName: - FIND.EXE - FINDSTR.EXE selection_findstr_cli: CommandLine|contains: lsass selection_special: CommandLine|contains|windash: - ' /i "lsass' - ' /i lsass.exe' - findstr "lsass - findstr lsass - findstr.exe "lsass - findstr.exe lsass condition: all of selection_findstr_* or selection_special falsepositives: - Unknown level: high regression_tests_path: regression_data/rules/windows/process_creation/proc_creation_win_findstr_lsass/info.yml