HexEval Loader has leveraged server-side client configurations to identify the public IP of the victim host.4
tool
HexEval Loader S1249
- Type
- malware
- Platforms
- Linux, macOS, Windows
- Created
- 22 October 2025
- Last modified
- 24 October 2025
HexEval Loader is a hex-encoded loader that collects host data, decodes follow-on scripts and acts as a downloader for the BeaverTail malware. HexEval Loader was first reported in April 2025. HexEval Loader has previously been leveraged by North Korea-affiliated threat actors identified as Contagious Interview. HexEval Loader has been delivered to victims through code repository sites utilizing typosquatting naming conventions of various npm packages.[1][2][3]
12
Techniques54th pct
7
Tactics68th 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 S1249
HexEval Loader has encoded module names and C2 URLs as hexadecimal strings in attempts to evade analysis.56
HexEval Loader has collected the username from the victim host.7
HexEval Loader has masqueraded and typosquatted as legitimate code repository packages and projects.89
HexEval Loader has exfiltrated victim data using HTTPS POST requests to its C2 servers.1011
HexEval Loader has utilized a cross-platform keylogger that has the capability to capture keystrokes on Windows, macOS and Linux systems.12
Standing S1249
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 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 / technique26med64th pct
64th percentile · 64% of 825 ATT&CK software entries have this many detection rules per technique or fewer.
Tests / technique5med
Detection coverage S1249
393 distinct rules cover the 12 techniques recorded for this tool. The 413 technique-to-rule mappings resolve to 393 distinct rules, because one rule can cover several techniques. 277 Sigma · 116 Splunk.
11 covered by at least one rule1 with no coverage393 distinct rules in total
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