Threat Actor Profile
Samba Spider
Samba Spider is a cybercrime threat actor linked to the Mispadu banking trojan. This group primarily targets users in Latin America, with a strong focus on systems using Spanish and Portuguese languages. They are known for their classic, yet effective, spam campaigns designed to trick people into downloading malware that steals banking credentials and other sensitive data.
Threat Actor Profile
Samba Spider
Country of Origin
Samba Spider's operations and language targeting suggest a strong connection to Brazil and other Latin American countries.
Members
The exact size and structure of the group are unknown. They operate with a clear focus on deploying the Mispadu malware.
Leadership
Specific leaders or aliases for Samba Spider are not publicly known.
Samba Spider TTPs
Tactics
Samba Spider is all about the money. Their main goal is to steal credentials, especially for banking sites. They do this by deploying the Mispadu trojan, which can present fake banking overlays to unsuspecting victims, capturing their login details as they type them in.
Techniques
The group relies on good old-fashioned social engineering. They send out spam emails, often with urgent subject lines about overdue invoices, to create a sense of panic. This pushes victims to click malicious links and download what they think is an important document but is actually the first stage of the malware infection.
Procedures
Samba Spider’s attack chain is a multi-layered process designed to sneak past defenses.
Initial Access: A spam email directs the target to download a ZIP file.
Execution: The ZIP file contains a Microsoft Installer (MSI) file with an embedded VBScript. This kicks off a three-layer obfuscation process.
Evasion: The script checks the system language. If it isn't Spanish or Portuguese, the attack stops. It also checks for virtual environments like VMWare or VirtualBox to avoid analysis. If it detects a sandbox, it terminates. Game over.
Malware Deployment: If the checks pass, the final VBScript loads an AutoIT injector, which deploys the final payload: a Delphi-based trojan (Mispadu).
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Notable Cyberattacks
Samba Spider has been behind numerous spam campaigns deploying the Mispadu banking trojan. One notable series of attacks involved emails about fake overdue invoices. These campaigns successfully tricked many users into downloading the malware, which then used fake banking overlays branded with the logos of legitimate banks to steal credentials. In July 2024, the group gained more notoriety when a hacktivist allegedly scraped and leaked a massive list of Indicators of Compromise from a security vendor, which included detailed data on Samba Spider and Mispadu.
Law Enforcement & Arrests
There are no public records of arrests or specific law enforcement actions directly targeting Samba Spider. However, the Mispadu trojan and its operators are well-documented by security researchers, and their activities are tracked by cybercrime units focused on financial fraud in Latin America and Europe.
How to Defend Against
Promote Email Skepticism: Train your team to be suspicious of unsolicited emails, especially those demanding urgent action. Rule number one: never download attachments or click links from an unknown sender. That "overdue invoice" can wait.
Restrict Malicious Scripts: A lot of Samba Spider's attack chain relies on VBScript. You can disable Windows Script Host (WSH) on machines that don't need it to cut off a major infection vector. Easy peasy.
Use Modern Security Tools: You need a security solution that can spot the sneaky behavior behind the attack. The Huntress Managed Security Platform is built for this. Our 24/7 SOC team hunts for the exact TTPs used by actors like Samba Spider, from malicious scripts to suspicious process injections. We'll find and stop them before they can touch your data.
Huntress provides the powerful, people-powered security you need to protect your organization from threats like Mispadu, without the big-brand price tag.
References
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