sigmahighHunting

Suspicious Svchost Process Access

Detects suspicious access to the "svchost" process such as that used by Invoke-Phantom to kill the thread of the Windows event logging service.

MITRE ATT&CK

T1562.002

defense-evasion

Detection Query

selection:
  TargetImage|endswith: :\Windows\System32\svchost.exe
  GrantedAccess: "0x1F3FFF"
  CallTrace|contains: UNKNOWN
filter_main_msbuild:
  SourceImage|contains: :\Program Files\Microsoft Visual Studio\
  SourceImage|endswith: \MSBuild\Current\Bin\MSBuild.exe
  CallTrace|contains:
    - Microsoft.Build.ni.dll
    - System.ni.dll
condition: selection and not 1 of filter_main_*

Author

Tim Burrell

Created

2020-01-02

Data Sources

windowsProcess Access Events

Platforms

windows

References

Tags

attack.defense-evasionattack.t1562.002

Raw Content

title: Suspicious Svchost Process Access
id: 166e9c50-8cd9-44af-815d-d1f0c0e90dde
status: test
description: Detects suspicious access to the "svchost" process such as that used by Invoke-Phantom to kill the thread of the Windows event logging service.
references:
    - https://github.com/hlldz/Invoke-Phant0m
    - https://twitter.com/timbmsft/status/900724491076214784
author: Tim Burrell
date: 2020-01-02
modified: 2023-01-30
tags:
    - attack.defense-evasion
    - attack.t1562.002
logsource:
    category: process_access
    product: windows
detection:
    selection:
        TargetImage|endswith: ':\Windows\System32\svchost.exe'
        GrantedAccess: '0x1F3FFF'
        CallTrace|contains: 'UNKNOWN'
    filter_main_msbuild:
        SourceImage|contains: ':\Program Files\Microsoft Visual Studio\'
        SourceImage|endswith: '\MSBuild\Current\Bin\MSBuild.exe'
        # Just to make sure it's "really" .NET :)
        CallTrace|contains:
            - 'Microsoft.Build.ni.dll'
            - 'System.ni.dll'
    condition: selection and not 1 of filter_main_*
falsepositives:
    - Unknown
level: high