JSS Loader has the ability to launch scheduled tasks to establish persistence.3
tool
JSS Loader S0648
- Type
- malware
- Platform
- Windows
- Created
- 22 September 2021
- Last modified
- 25 April 2025
JSS Loader is Remote Access Trojan (RAT) with .NET and C++ variants that has been used by FIN7 since at least 2020.[1][2]
7
Techniques33rd pct
5
Tactics41st pct
1
Threat groupunranked
0
CampaignsNone recorded
Enterprise ATT&CK only. Any Mobile or ICS rows on the same ATT&CK page are not carried.
MITRE reference S0648
JSS Loader has the ability to download and execute PowerShell scripts.4
JSS Loader can download and execute VBScript files.5
JSS Loader can download and execute JavaScript files.6
JSS Loader has the ability to download malicious executables to a compromised host.7
JSS Loader has been executed through malicious attachments contained in spearphishing emails.8
Standing S0648
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
Techniques733rd pct
33rd percentile · 67% of 825 ATT&CK software entries have more Enterprise techniques.
Tactics541st pct
41st percentile · 59% of 825 ATT&CK software entries have more tactics spanned.
Threat group161% 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 / technique66medTop 2%
98th percentile · 98% of 825 ATT&CK software entries have this many detection rules per technique or fewer.
Tests / technique12med
Detection coverage S0648
636 distinct rules cover the 7 techniques recorded for this tool. The 698 technique-to-rule mappings resolve to 636 distinct rules, because one rule can cover several techniques. 445 Sigma · 191 Splunk.
7 covered by at least one rule636 distinct rules in total
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