MITRE ATT&CK  /  T1555.003

T1555.003

Credentials from Web Browsers

Description

Adversaries may acquire credentials from web browsers by reading files specific to the target browser.(Citation: Talos Olympic Destroyer 2018) 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; however, methods exist to extract plaintext credentials from web browsers.For example, on Windows systems, encrypted credentials may be obtained from Google Chrome by reading a database file, <code>AppData\Local\Google\Chrome\User Data\Default\Login Data</code> and executing a SQL query: <code>SELECT action_url, username_value, password_value FROM logins;</code>. The plaintext password can then be obtained by passing the encrypted credentials to the Windows API function <code>CryptUnprotectData</code>, which uses the victim’s cached logon credentials as the decryption key.(Citation: Microsoft CryptUnprotectData April 2018) Adversaries have executed similar procedures for common web browsers such as FireFox, Safari, Edge, etc.(Citation: Proofpoint Vega Credential Stealer May 2018)(Citation: FireEye HawkEye Malware July 2017) Windows stores Internet Explorer and Microsoft Edge credentials in Credential Lockers managed by the [Windows Credential Manager](https://attack.mitre.org/techniques/T1555/004).Adversaries may also acquire credentials by searching web browser process memory for patterns that co…

Platforms

Mitigations

• M1051 — Update Software
• M1018 — User Account Management
• M1017 — User Training
• M1021 — Restrict Web-Based Content
• M1027 — Password Policies

Our coverage

• Attackers Abuse Bun JavaScript Runtime to Spread NWHStealer Infostealer
• ACSC Warns: ClickFix Campaign Delivers Vidar Stealer via Compromised Australian WordPress Sites

Source: MITRE ATT&CK Enterprise matrix. View on attack.mitre.org →