Trustwave's 2024 Retail Report Series Highlights Alarming E-Commerce Threats and Growing Fraud Against Retailers. Learn More

Trustwave's 2024 Retail Report Series Highlights Alarming E-Commerce Threats and Growing Fraud Against Retailers. Learn More

Services
Managed Detection & Response

Eliminate active threats with 24/7 threat detection, investigation, and response.

Co-Managed SOC (SIEM)

Maximize your SIEM investment, stop alert fatigue, and enhance your team with hybrid security operations support.

Advisory & Diagnostics

Advance your cybersecurity program and get expert guidance where you need it most.

Penetration Testing

Test your physical locations and IT infrastructure to shore up weaknesses before exploitation.

Database Security

Prevent unauthorized access and exceed compliance requirements.

Email Security

Stop email threats others miss and secure your organization against the #1 ransomware attack vector.

Digital Forensics & Incident Response

Prepare for the inevitable with 24/7 global breach response in-region and available on-site.

Firewall & Technology Management

Mitigate risk of a cyberattack with 24/7 incident and health monitoring and the latest threat intelligence.

Solutions
BY TOPIC
Microsoft Security
Unlock the full power of Microsoft Security
Offensive Security
Solutions to maximize your security ROI
Rapidly Secure New Environments
Security for rapid response situations
Securing the Cloud
Safely navigate and stay protected
Securing the IoT Landscape
Test, monitor and secure network objects
Why Trustwave
About Us
Awards and Accolades
Trustwave SpiderLabs Team
Trustwave Fusion Security Operations Platform
Trustwave Security Colony
Partners
Technology Alliance Partners
Key alliances who align and support our ecosystem of security offerings
Trustwave PartnerOne Program
Join forces with Trustwave to protect against the most advance cybersecurity threats

Facebook Malvertising Epidemic – Unraveling a Persistent Threat: SYS01

The Trustwave SpiderLabs Threat Intelligence team's ongoing study into how threat actors use Facebook for malicious activity has uncovered a new version of the SYS01 stealer. This stealer is designed to take over Facebook accounts, steal credential information from affected users' browsers, and then leverage legitimate accounts to further the spread of the malware.

 

Trustwave SpiderLabs' new report, Facebook Malvertising Epidemic – Unraveling a Persistent Threat: SYS01 – Part 1, follows up on the team's February 2024 study of Ov3r_Stealer, an infostealer distributed using Facebook advertising and phishing emails that stole credentials and crypto wallets. The new report offers a granular look at SYS01, which has been operating since about September 2023, and details how the attacker conducts reconnaissance, initial access, execution, defense evasion, and mitigations and recommendations.

 

SYS01 is an infostealer malware, and its name was introduced by Morphisec in March 2023. Being an infostealer, SYS01 focuses on exfiltrating browser data such as credentials, history, and cookies. A big chunk of its payload is focused on obtaining access tokens for Facebook accounts, specifically those with Facebook business accounts, which can aid the threat actors in spreading the malware.

 

The danger SYS01 and Ov3rStealer pose is massive and obvious. Facebook has about 2.9 billion monthly active users and 200 million business accounts. With the crossover between personal and business devices, any credentials stolen through Facebook could then be used to gain initial access and establish a foothold for additional attacks against a victim's network and endpoints. From there, the floodgates could be opened to a ransomware operation, or nation-state threat actors may attempt to cause disruption, harm, or exfiltrate sensitive data.

 

The approach SYS01's operators use highlights how hijacking Facebook business accounts is a robust strategy that can maximize its reach and impact. Its ability to hijack Facebook business accounts, especially those with significant reach, introduces another level of approach in terms of finding ways to amplify its reach but also damages the integrity of affected businesses, which could result in tarnished reputations and financial damage.

 

However, these details are just a taste of the team's analysis. Please follow this link to learn the technical elements behind the malware and insights into the threat actors, communication channels, and repositories.

ABOUT TRUSTWAVE

Trustwave is a globally recognized cybersecurity leader that reduces cyber risk and fortifies organizations against disruptive and damaging cyber threats. Our comprehensive offensive and defensive cybersecurity portfolio detects what others cannot, responds with greater speed and effectiveness, optimizes client investment, and improves security resilience. Learn more about us.

Latest Intelligence

Discover how our specialists can tailor a security program to fit the needs of
your organization.

Request a Demo