Sigma rule: Access to Browser Login Data

A detection rule from the SigmaHQ repository, shown as its author published it. Dataset version ref-6e0706a5d347, updated 2022-01-30T00:00:00.000Z.

Rule

Title: Access to Browser Login Data
Status: test
Level: medium
Author: frack113
Date: 2022-01-30
File: rules/windows/powershell/powershell_script/posh_ps_access_to_browser_login_data.yml
Commit: ccbb0369507f796db0b0ae6854c8a2be471b9d84

Adversaries may acquire credentials from web browsers by reading files specific to the target browser.
Web browsers commonly save credentials such as website usernames and passwords so that they do not need to be entered manually in the future.
Web browsers typically store the credentials in an encrypted format within a credential store.

Log source

product: windows
category: ps_script
definition: Requirements: Script Block Logging must be enabled

Detection

selection_cmd:
    ScriptBlockText|contains|all:
        - Copy-Item
        - '-Destination'
selection_path:
    ScriptBlockText|contains:
        - '\Opera Software\Opera Stable\Login Data'
        - '\Mozilla\Firefox\Profiles'
        - '\Microsoft\Edge\User Data\Default'
        - '\Google\Chrome\User Data\Default\Login Data'
        - '\Google\Chrome\User Data\Default\Login Data For Account'
condition: all of selection_*

False positives (as the rule lists them)

Unknown

MITRE ATT&CK ids this rule names

T1555.003

Related rules

References

https://github.com/redcanaryco/atomic-red-team/blob/f339e7da7d05f6057fdfcdd3742bfcf365fee2a9/atomics/T1555.003/T1555.003.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/powershell/powershell_script/posh_ps_access_to_browser_login_data.yml

Sources and licences

SigmaHQ
"Access to Browser Login Data" by frack113 (SigmaHQ). Rule: https://github.com/SigmaHQ/sigma/blob/ccbb0369507f796db0b0ae6854c8a2be471b9d84/rules/windows/powershell/powershell_script/posh_ps_access_to_browser_login_data.yml.
Licensed under the Detection Rule License (DRL) 1.1: https://github.com/SigmaHQ/Detection-Rule-License
Detection Rule License (DRL) 1.1

Cite this page

Dragons Eye Ransomware Tracker, "Sigma rule: Access to Browser Login Data",
entity page, dataset version ref-6e0706a5d347, updated 2022-01-30T00:00:00.000Z,
https://ransomware-tracker.com/detections/sigma/fc028194-969d-4122-8abe-0470d5b8f12f (accessed 2026-11-03).
Underlying source: SigmaHQ rule fc028194-969d-4122-8abe-0470d5b8f12f, commit ccbb0369507f796db0b0ae6854c8a2be471b9d84.

Pages change. The dataset version identifies the data, but no archive of old versions is kept, so this citation cannot be replayed later.