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CHANGELOG.md

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Archive of the old changelog

v1.6

  • WHIDS is installed as a true Windows service
  • Reworked the installation script to allow several options
  • Created an optimized Sysmon configuration to run with WHIDS
  • Process Integrity check not done before boot is finished
  • Removed DNS logging features by default (since Sysmon v10 has DNSQuery events)
  • Log message if process termination is not enabled
  • Sysmon service depends on WHIDS (solution found not to miss events at boot)
  • Updated to the latest version of Gene (v1.6)
  • New registry dump mode to dump suspicious registries
  • Some random code refactoring
  • Sysmon events enrichment:
    • Ancestors in CreateProcess
    • Name of the windows services is resolved and put in Services field for any event
    • CommandLine in NetworkConnect
    • User and IntegrityLevel propagated to all applicable events (all except DriverLoad)
    • CreateRemoteThread and ProcessAccess enrichment with:
      • SourceIntegrityLevel
      • TargetIntegrityLevel
      • SourceUser
      • TargetUser
      • TargetParentProcessGuid
      • SourceServices
      • TargetServices
    • ...

v1.5

  • Bunch of code rewritten to make things more consistent:
    • WHIDS is no longer command line based, most of the options are configured via a configuration file
    • Some command line switches names have changed
  • WHIDS manager can now be used as a true management server:
    • Update clients' rules
    • Update clients' containers
    • Receive dumps (files, memory) from the clients

v1.4

  • Dump hooks
    • dump file: dump as many relevant files as possible when an alert above threshold is raised
      • dump anything which is a file and that appears in Sysmon fields, depending on the event
      • can dump ADS
      • can dump scripts
      • can dump executables
    • dump memory: creates a MS full minidump of a process that triggers an alert above threshold
  • Process integrity hook
    • Two fields are added to the Sysmon CreateProcess events ProcessIntegrity and ParentProcessIntegrity. If value is -1 it means process integrity could not be computed. Otherwise it is a float value in [0;100] measuring the degree of similarity between the image loaded in memory and the image on the disk. The higher the value is, the more likely the process image has been modified.
  • Builtin alert forwarder
    • New command line utility whids-man aiming at collecting the logs and being deployed on a remote machine (windows, linux, macos ...)
      • HTTP / HTTPS are supported (HTTPS is preferred)
      • Builtin cert and key generation (convenient for testing but better with OpenSSL for prod)
      • Client authentication via API key to forward the logs
      • Server authentication can be enforced on client side via authentication key
      • Alerts are dumped in a GZIP file automatically rotated when 100MB size is reached
    • New command line switch -forward to configure forwarding on Host side
      • if manager is offline, we store the alerts in a local queue and upload them when the manager comes up again
      • builtin queue file rotation
      • builtin queued files cleaning if disk space is too high
  • Install script has been updated
    • Protects the installation directory to be accessible / modifiable only by users member of Administrators group or SYSTEM user
    • The scheduled tasks now starts whids-launcher.bat located in installation directory, instead of starting WHIDS directly. This way it is easier to modify the command line arguments.
  • Project tree has a bit changed, main code has been moved to tools directory

v1.3

  • Event Hook introduction
    • Can modify the events before going through detection engine
    • Created hooks to overcome domain name resolution issue
    • Implemented hooks to enrich Sysmon events 1, 6 and 7 with the size of the PE image
    • Implemented several other hooks
  • Can run in service mode:
    • restart in case of failure
    • log alerts to compressed file and rotate file automatically
    • log messages to a file
  • Installation script
    • creates a scheduled start running at boot to start Whids
    • agenerate an uninstall script dropped in the install folder
  • Number of new command lines arguments
    • -hooks: control event hook activation
    • -protect: dummy protection against crypto-locker (can be seen as a nice POC of event hooks)
    • -all: option to enable logging of all the events coming from the monitored channels should not be used in production, it is more for debugging purposes
    • ...
  • Some minor code refactoring

v1.2

  • Log to Windows Application channel
  • Updated with latest version of gene so it benefits of its new features
    • "Match extracts" feature to match parts of event fields against containers (blacklist/whitelist)
  • New channel Alias to Microsoft-Windows-DNS-Client/Operational
  • Command line switch to enable DNS client logs (Microsoft-Windows-DNS-Client/Operational log channel)