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GuLoader - S0561 (45c759ac-b490-48bb-80d4-c8eee3431027)

GuLoader is a file downloader that has been used since at least December 2019 to distribute a variety of remote administration tool (RAT) malware, including NETWIRE, Agent Tesla, NanoCore, FormBook, and Parallax RAT.(Citation: Unit 42 NETWIRE April 2020)(Citation: Medium Eli Salem GuLoader April 2021)

Cluster A Galaxy A Cluster B Galaxy B Level
GuLoader - S0561 (45c759ac-b490-48bb-80d4-c8eee3431027) Malware Registry Run Keys / Startup Folder - T1547.001 (9efb1ea7-c37b-4595-9640-b7680cd84279) Attack Pattern 1
GuLoader - S0561 (45c759ac-b490-48bb-80d4-c8eee3431027) Malware File Deletion - T1070.004 (d63a3fb8-9452-4e9d-a60a-54be68d5998c) Attack Pattern 1
GuLoader - S0561 (45c759ac-b490-48bb-80d4-c8eee3431027) Malware Malicious File - T1204.002 (232b7f21-adf9-4b42-b936-b9d6f7df856e) Attack Pattern 1
GuLoader - S0561 (45c759ac-b490-48bb-80d4-c8eee3431027) Malware Ingress Tool Transfer - T1105 (e6919abc-99f9-4c6c-95a5-14761e7b2add) Attack Pattern 1
Process Injection - T1055 (43e7dc91-05b2-474c-b9ac-2ed4fe101f4d) Attack Pattern GuLoader - S0561 (45c759ac-b490-48bb-80d4-c8eee3431027) Malware 1
Native API - T1106 (391d824f-0ef1-47a0-b0ee-c59a75e27670) Attack Pattern GuLoader - S0561 (45c759ac-b490-48bb-80d4-c8eee3431027) Malware 1
Time Based Evasion - T1497.003 (4bed873f-0b7d-41d4-b93a-b6905d1f90b0) Attack Pattern GuLoader - S0561 (45c759ac-b490-48bb-80d4-c8eee3431027) Malware 1
GuLoader - S0561 (45c759ac-b490-48bb-80d4-c8eee3431027) Malware Web Protocols - T1071.001 (df8b2a25-8bdf-4856-953c-a04372b1c161) Attack Pattern 1
Web Service - T1102 (830c9528-df21-472c-8c14-a036bf17d665) Attack Pattern GuLoader - S0561 (45c759ac-b490-48bb-80d4-c8eee3431027) Malware 1
Spearphishing Link - T1566.002 (2b742742-28c3-4e1b-bab7-8350d6300fa7) Attack Pattern GuLoader - S0561 (45c759ac-b490-48bb-80d4-c8eee3431027) Malware 1
GuLoader - S0561 (45c759ac-b490-48bb-80d4-c8eee3431027) Malware System Checks - T1497.001 (29be378d-262d-4e99-b00d-852d573628e6) Attack Pattern 1
GuLoader - S0561 (45c759ac-b490-48bb-80d4-c8eee3431027) Malware Malicious Link - T1204.001 (ef67e13e-5598-4adc-bdb2-998225874fa9) Attack Pattern 1
Registry Run Keys / Startup Folder - T1547.001 (9efb1ea7-c37b-4595-9640-b7680cd84279) Attack Pattern Boot or Logon Autostart Execution - T1547 (1ecb2399-e8ba-4f6b-8ba7-5c27d49405cf) Attack Pattern 2
File Deletion - T1070.004 (d63a3fb8-9452-4e9d-a60a-54be68d5998c) Attack Pattern Indicator Removal - T1070 (799ace7f-e227-4411-baa0-8868704f2a69) Attack Pattern 2
User Execution - T1204 (8c32eb4d-805f-4fc5-bf60-c4d476c131b5) Attack Pattern Malicious File - T1204.002 (232b7f21-adf9-4b42-b936-b9d6f7df856e) Attack Pattern 2
Time Based Evasion - T1497.003 (4bed873f-0b7d-41d4-b93a-b6905d1f90b0) Attack Pattern Virtualization/Sandbox Evasion - T1497 (82caa33e-d11a-433a-94ea-9b5a5fbef81d) 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
Spearphishing Link - T1566.002 (2b742742-28c3-4e1b-bab7-8350d6300fa7) Attack Pattern Phishing - T1566 (a62a8db3-f23a-4d8f-afd6-9dbc77e7813b) Attack Pattern 2
Virtualization/Sandbox Evasion - T1497 (82caa33e-d11a-433a-94ea-9b5a5fbef81d) Attack Pattern System Checks - T1497.001 (29be378d-262d-4e99-b00d-852d573628e6) Attack Pattern 2
User Execution - T1204 (8c32eb4d-805f-4fc5-bf60-c4d476c131b5) Attack Pattern Malicious Link - T1204.001 (ef67e13e-5598-4adc-bdb2-998225874fa9) Attack Pattern 2