Detectionmediumtest
Potential Suspicious Browser Launch From Document Reader Process
Detects when a browser process or browser tab is launched from an application that handles document files such as Adobe, Microsoft Office, etc. And connects to a web application over http(s), this could indicate a possible phishing attempt.
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Launch
Log Source
WindowsProcess Creation
ProductWindows← raw: windows
CategoryProcess Creation← raw: process_creation
Events generated when a new process is spawned on the system. Covers command-line arguments, parent/child relationships, and process metadata.
Detection Logic
Detection Logic3 selectors
detection:
selection:
ParentImage|contains:
- 'Acrobat Reader'
- 'Microsoft Office'
- 'PDF Reader'
Image|endswith:
- '\brave.exe'
- '\chrome.exe'
- '\firefox.exe'
- '\msedge.exe'
- '\opera.exe'
- '\maxthon.exe'
- '\seamonkey.exe'
- '\vivaldi.exe'
CommandLine|contains: 'http'
filter_main_microsoft_help:
CommandLine|contains: 'https://go.microsoft.com/fwlink/'
filter_optional_foxit:
CommandLine|contains:
- 'http://ad.foxitsoftware.com/adlog.php?'
- 'https://globe-map.foxitservice.com/go.php?do=redirect'
condition: selection and not 1 of filter_main_* and not 1 of filter_optional_*False Positives
Unlikely in most cases, further investigation should be done in the commandline of the browser process to determine the context of the URL accessed.
MITRE ATT&CK
Tactics
Sub-techniques
Rule Metadata
Rule ID
1193d960-2369-499f-a158-7b50a31df682
Status
test
Level
medium
Type
Detection
Created
Mon May 27
Modified
Tue Oct 07
Author
Path
rules/windows/process_creation/proc_creation_win_susp_browser_launch_from_document_reader_process.yml
Raw Tags
attack.executionattack.t1204.002