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BIOPASS RAT is a remote access trojan used as a first-stage backdoor in campaigns associated with the China-aligned espionage group FishMonger, also known as Earth Lusca and Aquatic Panda. It forms part of a broader toolkit that includes ShadowPad, Spyder, FunnySwitch, Cobalt Strike, and SprySOCKS. FishMonger has deployed BIOPASS RAT among its initial-infection tools in operations targeting universities, government organizations, media and technology companies, and COVID-19 research organizations in Hong Kong, Taiwan, India, and the United States.
A 2021 BIOPASS RAT campaign targeted online gambling companies in China through watering-hole attacks. BIOPASS RAT opens a local HTTP listener on a high-numbered port; associated watering-hole scripts can probe that listener to determine whether a visiting system is already infected. Campaign links to Earth Lusca include the reuse of a stolen code-signing certificate that was also observed signing Cobalt Strike malware.
Mallory pivots from this family to the IOCs, detections, and named campaigns that touch your stack, and pages you when something new lands.
3 distinct threat actors attributed by public researchers. Open in Mallory to see the full evidence chain and overlapping campaigns.
They distribute other first-stage backdoors for initial infections including FunnySwitch, BIOPASS RAT, and Cobalt Strike.
The group uses a variety of TTPs including but not limited to LoTL tactics, phishing, ransomware, cryptocurrency mining, supply chain attacks, China Chopper, Gh0st RaT, PlugX, HighNoon, Derusbi, BioPass RAT, RedXOR, and ShadowPad.
The group uses a variety of TTPs including but not limited to LoTL tactics, phishing, ransomware, cryptocurrency mining, supply chain attacks, China Chopper, Gh0st RaT, PlugX, HighNoon, Derusbi, BioPass RAT, RedXOR, and ShadowPad.
1 distinct technique documented for this family, organized by ATT&CK tactic.
1 indicator attributed across vendor reports, sandbox runs, and researcher write-ups. Full values are available in Mallory.
File hashes (MD5, SHA-1, SHA-256) from samples and reports.
12 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A RAT campaign mentioned for certificate overlap and a similar localhost high-port HTTP listener technique used to detect prior infection during watering-hole attacks.
Named as part of FishMonger’s toolkit.
Named as part of FishMonger's wider espionage toolkit.
A remote access trojan listed as part of FishMonger’s toolset.
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.