Cookie Stealer Script Info

Joe Web Challenge — Google CTF 2017 | by Ons A. - codeburst

: It sends the stolen cookies to a remote server controlled by the attacker via an HTTP GET or POST request. Consequences of a Successful Attack

A is a malicious tool used by threat actors to hijack user sessions by exfiltrating browser cookies. This type of attack is a form of Cross-Site Scripting (XSS) , where an attacker injects JavaScript into a trusted website to capture sensitive data. How the Script Works cookie stealer script

: The attacker finds an XSS vulnerability on a target site or uses spear-phishing emails to deliver the script.

: Some scripts, like those used by the "Earth Wendigo" group, can append themselves to the victim's email signature to spread to other contacts. Prevention and Mitigation Joe Web Challenge — Google CTF 2017 | by Ons A

: Attackers can impersonate the victim and log into their accounts (e.g., webmail, banking, or social media) without needing a password.

: Once inside, the attacker can exfiltrate emails, personal documents, and financial information. This type of attack is a form of

: The script accesses the document.cookie object, which often contains session identifiers, login keys, and personalization data.