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XORIndex Loader - S1248 (fedd9fcd-1f9c-4be0-9d84-f31e88eb6664)

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.(Citation: Socket BeaverTail XORIndex HexEval Contagious Interview July 2025)

Cluster A Galaxy A Cluster B Galaxy B Level
XORIndex Loader - S1248 (fedd9fcd-1f9c-4be0-9d84-f31e88eb6664) Malware Match Legitimate Resource Name or Location - T1036.005 (1c4e5d32-1fe9-4116-9d9d-59e3925bd6a2) Attack Pattern 1
XORIndex Loader - S1248 (fedd9fcd-1f9c-4be0-9d84-f31e88eb6664) Malware Exfiltration Over C2 Channel - T1041 (92d7da27-2d91-488e-a00c-059dc162766d) Attack Pattern 1
XORIndex Loader - S1248 (fedd9fcd-1f9c-4be0-9d84-f31e88eb6664) Malware Encrypted/Encoded File - T1027.013 (0d91b3c0-5e50-47c3-949a-2a796f04d144) Attack Pattern 1
XORIndex Loader - S1248 (fedd9fcd-1f9c-4be0-9d84-f31e88eb6664) Malware System Owner/User Discovery - T1033 (03d7999c-1f4c-42cc-8373-e7690d318104) Attack Pattern 1
System Network Configuration Discovery - T1016 (707399d6-ab3e-4963-9315-d9d3818cd6a0) Attack Pattern XORIndex Loader - S1248 (fedd9fcd-1f9c-4be0-9d84-f31e88eb6664) Malware 1
XORIndex Loader - S1248 (fedd9fcd-1f9c-4be0-9d84-f31e88eb6664) Malware System Information Discovery - T1082 (354a7f88-63fb-41b5-a801-ce3b377b36f1) Attack Pattern 1
System Location Discovery - T1614 (c877e33f-1df6-40d6-b1e7-ce70f16f4979) Attack Pattern XORIndex Loader - S1248 (fedd9fcd-1f9c-4be0-9d84-f31e88eb6664) Malware 1
XORIndex Loader - S1248 (fedd9fcd-1f9c-4be0-9d84-f31e88eb6664) Malware JavaScript - T1059.007 (0f4a0c76-ab2d-4cb0-85d3-3f0efb8cba0d) Attack Pattern 1
XORIndex Loader - S1248 (fedd9fcd-1f9c-4be0-9d84-f31e88eb6664) Malware Command Obfuscation - T1027.010 (d511a6f6-4a33-41d5-bc95-c343875d1377) Attack Pattern 1
Deobfuscate/Decode Files or Information - T1140 (3ccef7ae-cb5e-48f6-8302-897105fbf55c) Attack Pattern XORIndex Loader - S1248 (fedd9fcd-1f9c-4be0-9d84-f31e88eb6664) Malware 1
XORIndex Loader - S1248 (fedd9fcd-1f9c-4be0-9d84-f31e88eb6664) Malware Ingress Tool Transfer - T1105 (e6919abc-99f9-4c6c-95a5-14761e7b2add) Attack Pattern 1
XORIndex Loader - S1248 (fedd9fcd-1f9c-4be0-9d84-f31e88eb6664) Malware Web Protocols - T1071.001 (df8b2a25-8bdf-4856-953c-a04372b1c161) Attack Pattern 1
Match Legitimate Resource Name or Location - T1036.005 (1c4e5d32-1fe9-4116-9d9d-59e3925bd6a2) Attack Pattern Masquerading - T1036 (42e8de7b-37b2-4258-905a-6897815e58e0) Attack Pattern 2
Obfuscated Files or Information - T1027 (b3d682b6-98f2-4fb0-aa3b-b4df007ca70a) Attack Pattern Encrypted/Encoded File - T1027.013 (0d91b3c0-5e50-47c3-949a-2a796f04d144) Attack Pattern 2
Command and Scripting Interpreter - T1059 (7385dfaf-6886-4229-9ecd-6fd678040830) Attack Pattern JavaScript - T1059.007 (0f4a0c76-ab2d-4cb0-85d3-3f0efb8cba0d) Attack Pattern 2
Obfuscated Files or Information - T1027 (b3d682b6-98f2-4fb0-aa3b-b4df007ca70a) Attack Pattern Command Obfuscation - T1027.010 (d511a6f6-4a33-41d5-bc95-c343875d1377) Attack Pattern 2
Application Layer Protocol - T1071 (355be19c-ffc9-46d5-8d50-d6a036c675b6) Attack Pattern Web Protocols - T1071.001 (df8b2a25-8bdf-4856-953c-a04372b1c161) Attack Pattern 2