GuLoader
MITRE
Malware Type:
Other
Other
First seen:
Unknown
Unknown
Last seen:
Unknown
Unknown
Details:
[GuLoader](https://attack.mitre.org/software/S0561) 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](https://attack.mitre.org/software/S0198), [Agent Tesla](https://attack.mitre.org/software/S0331), [NanoCore](https://attack.mitre.org/software/S0336), FormBook, and Parallax RAT.(Citation: Unit 42 NETWIRE April 2020)(Citation: Medium Eli Salem GuLoader April 2021)
Associated Techniques (12)
| ID | ATT&CK | Tactics |
|---|---|---|
| T1055 | Process Injection | - |
| T1070.004 | File Deletion | - |
| T1071.001 | Web Protocols | - |
| T1102 | Web Service | - |
| T1105 | Ingress Tool Transfer | - |
| T1106 | Native API | - |
| T1204.001 | Malicious Link | - |
| T1204.002 | Malicious File | - |
| T1497.001 | System Checks | - |
| T1497.003 | Time Based Checks | - |
| T1547.001 | Registry Run Keys / Startup Folder | - |
| T1566.002 | Spearphishing Link | - |
Metadata
| ID: | 180 |
| Created: | 13/01/2026 17:48 |
| Updated: | 06/03/2026 16:00 |