Sigma rule: Suspicious Where Execution

Rule

Title

Suspicious Where Execution

Status

test

Level

low

Author

frack113, Nasreddine Bencherchali (Nextron Systems)

Date

2021-12-13

Modified

2022-06-29

File

rules/windows/process_creation/proc_creation_win_where_browser_data_recon.yml

Commit

ccbb0369507f796db0b0ae6854c8a2be471b9d84

Adversaries may enumerate browser bookmarks to learn more about compromised hosts.
Browser bookmarks may reveal personal information about users (ex: banking sites, interests, social media, etc.) as well as details about
internal network resources such as servers, tools/dashboards, or other related infrastructure.

Log source

product

windows

category

process_creation

Detection

where_exe:
    - Image|endswith: '\where.exe'
    - OriginalFileName: 'where.exe'
where_opt:
    CommandLine|contains:
        # Firefox Data
        - 'places.sqlite'
        - 'cookies.sqlite'
        - 'formhistory.sqlite'
        - 'logins.json'
        - 'key4.db'
        - 'key3.db'
        - 'sessionstore.jsonlz4'
        # Chrome Data
        - 'History'
        - 'Bookmarks'
        - 'Cookies'
        - 'Login Data'
condition: all of where_*

False positives (as the rule lists them)

• Unknown

Tags

• attack.discovery
• attack.t1217

MITRE ATT&CK ids this rule names

• T1217

References

• https://github.com/redcanaryco/atomic-red-team/blob/f339e7da7d05f6057fdfcdd3742bfcf365fee2a9/atomics/T1217/T1217.md

Read on 2026-11-03T00:58:21.399Z under licence sigma-drl-1.1@d5f4c36a from https://github.com/SigmaHQ/sigma/blob/ccbb0369507f796db0b0ae6854c8a2be471b9d84/rules/windows/process_creation/proc_creation_win_where_browser_data_recon.yml