FastFire
FastFire is an Android malware family associated with the North Korea-linked Kimsuky espionage group. Reporting cited in the source material states that Kimsuky was observed leveraging FastFire alongside other Android malware including FastViewer and FastSpy. Additional source material lists FastFire among tools associated with Kimsuky/NICKEL KIMBALL, alongside BabyShark, KONNI, FireViewer, ReconShark, KimJongRAT, and Kimsuky RAT. Kimsuky is described as a long-running DPRK-aligned espionage actor that primarily targets NGOs, think tanks, diplomatic agencies, military organizations, economic groups, and research entities, especially those focused on North Korean policy and relations, with targeting expanding beyond South Korea to other countries. The group is known for extensive spearphishing, typosquatting and theme-aligned domains, and customized social engineering based on public-source research. The provided content does not give technical details on FastFire’s internal capabilities, persistence, command-and-control, or specific indicators of compromise beyond its use by Kimsuky and its identification as Android malware.
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.
Groups observed using it
2 distinct threat actors attributed by public researchers. Open in Mallory to see the full evidence chain and overlapping campaigns.
Kimsuky was observed leveraging new Android malware known as FastFire, FastViewer, and FastSpy
Tools BabyShark, KONNI, FastFire, FireViewer, FastSpy, ReconShark, KimJongRAT, Kimsuky
Techniques & procedures
3 distinct techniques documented for this family, organized by ATT&CK tactic.
Resource Development
1 technique"...using typosquatting or domains thematically aligned with their target."
Initial Access
2 techniques"The threat actors conduct extensive spearphishing operations, using typosquatting or domains thematically aligned with their target."
"...often involves malicious Hangul Word Processing (HWP) documents as a delivery mechanism... evolved its capabilities to include... Microsoft Word and PDF documents."
Recent activity
2 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.