LoFP LoFP / software using weird folders for updates

Techniques

Sample rules

New RUN Key Pointing to Suspicious Folder

Description

Detects suspicious new RUN key element pointing to an executable in a suspicious folder

Detection logic

condition: all of selection_* and not 1 of filter_main_*
filter_main_windows_update:
  Details|contains|all:
  - rundll32.exe C:\WINDOWS\system32\advpack.dll,DelNodeRunDLL32
  - C:\Windows\Temp\
  Image|startswith: C:\Windows\SoftwareDistribution\Download\
selection_details:
- Details|contains:
  - :\$Recycle.bin\
  - :\Temp\
  - :\Users\Default\
  - :\Users\Desktop\
  - :\Users\Public\
  - :\Windows\Temp\
  - \AppData\Local\Temp\
  - '%temp%\'
  - '%tmp%\'
- Details|startswith:
  - '%Public%\'
  - wscript
  - cscript
selection_target:
  TargetObject|contains:
  - \SOFTWARE\Microsoft\Windows\CurrentVersion\Run\
  - \SOFTWARE\Microsoft\Windows\CurrentVersion\RunOnce\