VulnPulse

← Threat Actor Index

Jewelbug

aka REF7707, CL-STA-0049, Earth Alux

Espionage

An espionage group believed to be of Chinese origin. In 2025 it spent five months inside a Russian IT provider, possibly preparing to attack that firm's customers.

Alert level
1/ 5
Reports & advisories (90 days)
0
Known exploited CVEs
0
Personal data leaked (disclosed)
None confirmed

Attribution

Exploited vulnerabilities and targeted products

Microsoft

If you run any of these products, first make sure they are updated to a fixed version.

How they attack

Inside

Disabling defenses with renamed tools

Like bringing in a real maintenance tool under a different label and using it to disconnect the alarm.

Inside

Using cloud services as a hotline

Like leaving coded notes on a public notice board everyone uses, to talk with accomplices.

Goal

Getting into the software factory

Like getting onto a food factory's production line, where every product shipped could be tampered with.

Sources

Attributions are quoted as assessed by governments and security vendors. VulnPulse does not make attributions itself.

Leak counts only add up figures disclosed by the affected companies or authorities, never the attackers' own claims. We do not list victim names or link to leak sites.

The alert level is calculated automatically from reports and advisories in the last 90 days, known exploited vulnerabilities, and whether the group has targeted Japan.

Updated 2026-10-23 · daily