checkupdate.js
Hunt this family in your stack
Mallory pivots from this family to the IOCs, detections, and named campaigns that touch your stack, and pages you when something new lands.
Vulnerabilities exploited
2 CVEs Mallory has correlated with this family across public research and vendor advisories. Each row links to the full Mallory page for that vulnerability.
"The second stage is a simple JavaScript loader named checkupdate.js"; IoC: checkupdate.js detected as JS/WinterVivern.B.
"The second stage is a simple JavaScript loader named checkupdate.js"; IoC: checkupdate.js detected as JS/WinterVivern.B.
Groups observed using it
1 distinct threat actor attributed by public researchers. Open in Mallory to see the full evidence chain and overlapping campaigns.
"The second stage is a simple JavaScript loader named checkupdate.js"; IoC: checkupdate.js detected as JS/WinterVivern.B.
Recent activity
1 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
The version that knows your environment.
Match every observed IP, domain, and hash against your live telemetry.
Named campaigns wielding this family, with evidence pinned to each claim.
CVEs this family uses for access and lateral movement.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Every documented technique, ranked by evidence weight.
Reddit, Mastodon, and CTI community discussion around this family.