GuLoader has the ability to inject shellcode into a donor processes that is started in a suspended state. GuLoader has previously used RegAsm as a donor process.3
tool
GuLoader S0561
- Type
- malware
- Platform
- Windows
- Created
- 11 January 2021
- Last modified
- 25 April 2025
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.[1][2]
12
Techniques54th pct
7
Tactics68th pct
0
Threat groupsNone recorded
0
CampaignsNone recorded
Enterprise ATT&CK only. Any Mobile or ICS rows on the same ATT&CK page are not carried.
MITRE reference S0561
GuLoader can delete its executable from the AppData\Local\Temp directory on the compromised host.4
GuLoader has the ability to download malware from Google Drive.7
GuLoader can download further malware for execution on the victim's machine.8
GuLoader can use a number of different APIs for discovery and execution.9
Standing S0561
Reach is how much of ATT&CK this tool touches. Coverage is how well defended each thing it does is, as a median per technique rather than a total — a total would just restate the reach. Each figure is ranked against all 825 ATT&CK software entries only where that population actually spreads. Where most of the population shares one value, a percentile would rank the tie instead of the entity, so the raw value is shown and no rank is claimed.
Reach
Techniques1254th pct
54th percentile · 54% of 825 ATT&CK software entries have this many Enterprise techniques or fewer.
Tactics768th pct
68th percentile · 68% of 825 ATT&CK software entries have this many tactics spanned or fewer.
Threat groups061% tie · 22 values
61% of the population shares a single value across only 22 distinct values, so a percentile here would rank the tie, not the entity.
Campaigns085% tie · 8 values
85% of the population shares a single value across only 8 distinct values, so a percentile here would rank the tie, not the entity.
Coverage
Rules / technique23.5med56th pct
56th percentile · 56% of 825 ATT&CK software entries have this many detection rules per technique or fewer.
Tests / technique6.5med
Detection coverage S0561
444 distinct rules cover the 12 techniques recorded for this tool. The 454 technique-to-rule mappings resolve to 444 distinct rules, because one rule can cover several techniques. 295 Sigma · 149 Splunk.
12 covered by at least one rule444 distinct rules in total
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