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Threat Group Cards: A Threat Actor Encyclopedia

Permanent link Tool: FALLCHILL

NamesFALLCHILL
FallChill RAT
CategoryMalware
TypeBackdoor
Description(US-CERT) According to trusted third-party reporting, HIDDEN COBRA actors have likely been using FALLCHILL malware since 2016 to target the aerospace, telecommunications, and finance industries. The malware is a fully functional RAT with multiple commands that the actors can issue from a command and control (C2) server to a victim’s system via dual proxies. FALLCHILL typically infects a system as a file dropped by other HIDDEN COBRA malware or as a file downloaded unknowingly by users when visiting sites compromised by HIDDEN COBRA actors. HIDDEN COBRA actors use an external tool or dropper to install the FALLCHILL malware-as-a-service to establish persistence. Because of this, additional HIDDEN COBRA malware may be present on systems compromised with FALLCHILL.
Information<https://www.us-cert.gov/ncas/alerts/TA17-318A>
MITRE ATT&CK<https://attack.mitre.org/software/S0181/>
AlienVault OTX<https://otx.alienvault.com/browse/pulses?q=tag:FALLCHILL>

Last change to this tool card: 22 April 2020

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All groups using tool FALLCHILL

ChangedNameCountryObserved

APT groups

 Lazarus Group, Hidden Cobra, Labyrinth ChollimaNorth Korea2007-Spring 2021X

1 group listed (1 APT, 0 other, 0 unknown)

Thailand Computer Emergency Response Team (ThaiCERT)
Electronic Transactions Development Agency

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