Malware.View on attack.mitre.org
XORIndex Loader is a XOR-encoded loader that collects host data, decodes follow-on scripts and acts as a downloader for the BeaverTail malware. XORIndex Loader was first reported in June 2025. XORIndex Loader has been leveraged by North Korea-affiliated threat actors identified as Contagious Interview. XORIndex Loader has been delivered to victims through code repository sites utilizing typo squatting naming conventions of various npm packages.
| Technique | Procedure example |
|---|---|
| T1016 System Network Configuration Discovery |
XORIndex Loader has leveraged webservices to identify the public IP of the victim host. |
| T1027.010 Command Obfuscation |
XORIndex Loader has obfuscated strings using ASCII buffers and TextDecoder. |
| T1027.013 Encrypted/Encoded File |
XORIndex Loader has encoded module names and C2 URLs as hexadecimal strings in attempts to evade analysis. |
| T1033 System Owner/User Discovery |
XORIndex Loader has collected the username from the victim host. |
| T1036.005 Match Legitimate Resource Name or Location |
XORIndex Loader has leveraged legitimate package names to mimic frequently utilized tools to entice victims to download and execute malicious payloads. |
| T1041 Exfiltration Over C2 Channel |
XORIndex Loader has exfiltrated victim data using HTTPS POST requests to its C2 servers. |
| T1059.007 JavaScript |
XORIndex Loader has executed malicious JavaScript code. |
| T1071.001 Web Protocols |
XORIndex Loader has used HTTPS POST to communicate with C2. |
| T1082 System Information Discovery |
XORIndex Loader has the ability to collect the hostname, OS Username, Geolocation, and OS version of an infected host. |
| T1105 Ingress Tool Transfer |
XORIndex Loader has been used to download a malicious payload to include BeaverTail. |
| T1140 Deobfuscate/Decode Files or Information |
XORIndex Loader can decode its payload prior to execution. |
| T1614 System Location Discovery |
XORIndex Loader can identify the geographical location of a victim host. |
None recorded.
Data from MITRE ATT&CK® (Enterprise). ATT&CK® is a registered trademark of The MITRE Corporation.
