(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.
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| Reconnaissance | Resource Development | Initial Access | Execution | Persistence | Privilege Escalation | Defense Evasion | Credential Access | Discovery | Lateral Movement | Collection | Command and Control | Exfiltration | Impact |
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Tool: FALLCHILL
Names: FALLCHILL, FallChill RAT
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.
Category: Malware
Type: Backdoor
Information: https://www.us-cert.gov/ncas/alerts/TA17-318A
Mitre-attack: https://attack.mitre.org/software/S0181/
Alienvault-otx: https://otx.alienvault.com/browse/pulses?q=tag:FALLCHILL
Last-card-change: 2020-04-22
Source: https://apt.etda.or.th/cgi-bin/listtools.cgi
| TA0043 | TA0042 | TA0001 | TA0002 | TA0003 | TA0004 | TA0005 | TA0006 | TA0007 | TA0008 | TA0009 | TA0011 | TA0010 | TA0040 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Reconnaissance | Resource Development | Initial Access | Execution | Persistence | Privilege Escalation | Defense Evasion | Credential Access | Discovery | Lateral Movement | Collection | Command and Control | Exfiltration | Impact |
T1053.002 SCHEDULED TASK/JOB : AT at can be used to schedule a task on a system to be executed at a specific date or time. | T1053.002 SCHEDULED TASK/JOB : AT at can be used to schedule a task on a system to be executed at a specific date or time. | T1053.002 SCHEDULED TASK/JOB : AT at can be used to schedule a task on a system to be executed at a specific date or time. |