Cybercriminals have once again wrapped malware in a seasonal disguise. SantaStealer, a newly identified information-stealing malware, has emerged as a growing threat aimed at harvesting browser data, credentials, and cryptocurrency wallets. Despite its festive name, SantaStealer is anything but cheerful — it represents the continued evolution and commoditization of infostealer malware.
This article breaks down what SantaStealer is, how it works, how it compares to other popular stealers, and what defenders should watch for.
What Is SantaStealer?
SantaStealer is a malware-as-a-service (MaaS) infostealer that is being actively advertised and sold on underground forums and Telegram channels. Researchers have identified it as a rebranded or evolved variant of an earlier stealer known as BluelineStealer, suggesting that its operators are attempting to capitalize on a fresh name and renewed marketing push.
The malware primarily targets Windows systems (Windows 7–11) and is designed to run with minimal user interaction. Like many modern stealers, SantaStealer focuses on speed — quickly collecting valuable data and exfiltrating it to attacker-controlled servers before detection occurs.
What Data Does SantaStealer Steal?
SantaStealer is built to extract a wide range of sensitive information, including:
🔑 Browser Data
- Saved usernames and passwords
- Cookies and session tokens
- Autofill data and stored payment information
- Browsing history
Popular Chromium-based browsers (Chrome, Edge, Brave) and Firefox are common targets.
💰 Cryptocurrency Wallets
- Local wallet files
- Browser-based wallet extensions
- Configuration and credential data for popular crypto wallets
This makes SantaStealer especially dangerous for users who manage digital assets directly from their browsers.
📱 Application Credentials
SantaStealer also targets credentials and tokens from applications such as:
- Discord and Telegram
- Steam and gaming platforms
- FTP and VPN clients
- Email clients and password managers
Once collected, this data is packaged and sent to a command-and-control (C2) server controlled by the attacker.
How SantaStealer Compares to Raccoon and Lumma
SantaStealer enters a crowded ecosystem dominated by established infostealers like Raccoon and Lumma (LummaC2).
- Raccoon Stealer is one of the most well-known MaaS stealers, valued for its simplicity and reliability. While effective, it relies on older techniques and is increasingly well-detected by security tools.
- Lumma Stealer is more modern and sophisticated, frequently updated with improved obfuscation, flexible delivery methods, and aggressive credential harvesting.
- SantaStealer, by comparison, is newer and less mature. Early samples show limited obfuscation and basic anti-analysis checks. However, its developers advertise plans for in-memory execution and enhanced evasion, indicating ongoing development.
In short, SantaStealer may not yet match Lumma’s sophistication, but its rapid development and low barrier to entry make it a threat worth watching.
How SantaStealer Spreads
While specific campaigns are still being tracked, SantaStealer is believed to use familiar infostealer distribution techniques, including:
- Phishing emails with malicious attachments or links
- Fake software installers and cracked applications
- Trojanized downloads shared via forums or file-hosting sites
- Social engineering techniques, such as fake CAPTCHA pages
These methods are inexpensive and effective, allowing attackers to infect large numbers of systems quickly.
Indicators of Compromise (IOCs)
| IOC Type | Indicator | Description / Notes |
|---|---|---|
| SantaStealer DLL Hash (SHA-256) | 1a277cba1676478bf3d47bec97edaa14f83f50bdd11e2a15d9e0936ed243fd64 | DLL export stealer module identified in early samples. |
| SantaStealer DLL Hash (SHA-256) | abbb76a7000de1df7f95eef806356030b6a8576526e0e938e36f71b238580704 | Additional DLL build from analysis. |
| SantaStealer DLL Hash (SHA-256) | 5db376a328476e670aeefb93af8969206ca6ba8cf0877fd99319fa5d5db175ca | Variant seen in modular configurations. |
| SantaStealer DLL Hash (SHA-256) | a8daf444c78f17b4a8e42896d6cb085e4faad12d1c1ae7d0e79757e6772bddb9 | Exported symbol DLL sample. |
| SantaStealer DLL Hash (SHA-256) | 5c51de7c7a1ec4126344c66c70b71434f6c6710ce1e6d160a668154d461275ac | Another build from observed distribution. |
| SantaStealer DLL Hash (SHA-256) | 48540f12275f1ed277e768058907eb70cc88e3f98d055d9d73bf30aa15310ef3 | Identified via static analysis. |
| SantaStealer DLL Hash (SHA-256) | 99fd0c8746d5cce65650328219783c6c6e68e212bf1af6ea5975f4a99d885e59 | Built with features targeting browsers & apps. |
| SantaStealer DLL Hash (SHA-256) | ad8777161d4794281c2cc652ecb805d3e6a9887798877c6aa4babfd0ecb631d2 | Observed in early campaign samples. |
| SantaStealer DLL Hash (SHA-256) | 73e02706ba90357aeeb4fdcbdb3f1c616801ca1affed0a059728119bd11121a4 | Typical DLL module flagged by generic stealer rules. |
| SantaStealer DLL Hash (SHA-256) | e04936b97ed30e4045d67917b331eb56a4b2111534648adcabc4475f98456727 | Sample used for configuration extraction. |
| SantaStealer DLL Hash (SHA-256) | 66fef499efea41ac31ea93265c04f3b87041a6ae3cd14cd502b02da8cc77cca8 | Additional known build. |
| SantaStealer DLL Hash (SHA-256) | 4edc178549442dae3ad95f1379b7433945e5499859fdbfd571820d7e5cf5033c | Another DLL from research samples. |
| SantaStealer EXE Hash (SHA-256) | 926a6a4ba8402c3dd9c33ceff50ac957910775b2969505d36ee1a6db7a9e0c87 | Executable payload build seen in the wild. |
| SantaStealer EXE Hash (SHA-256) | 9b017fb1446cdc76f040406803e639b97658b987601970125826960e94e9a1a6 | Alternate EXE sample identified. |
| SantaStealer EXE Hash (SHA-256) | f81f710f5968fea399551a1fb7a13fad48b005f3c9ba2ea419d14b597401838c | Another build targeting Windows. |
| C2 Server (IPv4:Port) | 31[.]57[.]38[.]244:6767 | Hardcoded C2 IP & port used for exfiltration. |
| C2 Server (IPv4:Port) | 80[.]76[.]49[.]114:6767 | Secondary C2 endpoint seen in samples. |
| C2 Domain/Platform | t[.]me/SantaStealer | Telegram channel used for distribution and operator coordination. |
| Malware Panel URL | lolz[.]live/santa/ | Underground forum page associated with SantaStealer advertising. |
How to Protect Against SantaStealer
While no single control can stop all infostealers, the following steps significantly reduce risk:
- Use reputable endpoint protection and keep it updated
- Enable multi-factor authentication (MFA) for email, crypto exchanges, and critical services
- Avoid downloading pirated or cracked software
- Educate users about phishing and social engineering tactics
- Monitor outbound network traffic for unusual destinations and data exfiltration patterns
Organizations should also regularly update detection rules and threat intelligence feeds, as infostealer infrastructure changes frequently.
