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RushDrop, also known as ChronosRAT, is a Linux dropper used by the China-nexus espionage actor UAT-7290. It is deployed in intrusions against telecommunications providers and other critical-infrastructure organizations, principally in South Asia, with observed expansion into Southeastern Europe. UAT-7290 gains access to public-facing edge devices through exploitation of known one-day vulnerabilities and targeted SSH brute-force activity before deploying its Linux-focused malware suite. RushDrop performs basic virtual-machine and sandbox checks, terminating and deleting itself when those checks indicate analysis. On successful execution, it creates a concealed staging location, decodes embedded components, deploys the DriveSwitch execution component and the SilentRaid persistent backdoor, and removes itself to reduce forensic evidence. The dropped BusyBox utility is abused to support command execution by subsequent components.
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2 distinct threat actors attributed by public researchers. Open in Mallory to see the full evidence chain and overlapping campaigns.
RushDrop (also known as ChronosRAT) is the initial-stage dropper that kickstarts the infection chain.
ChronosRAT: A modular Linux RAT that ensures persistence via a watchdog process. It includes AES-encrypted TCP C2, dynamic RSA key updates, and modules for remote shell, keylogging, screenshots, port forwarding, file management, and SOCKS proxy.
24 distinct techniques documented for this family, organized by ATT&CK tactic.
UAT-7290 typically leverages public proof-of-concepts (PoCs) for various vulnerabilities and SSH brute force attacks to compromise public-facing devices.
T1027: Obfuscated Files or Information – UAT-7290 malware obfuscation
ChronosRAT, a modular ELF binary that's capable of shellcode execution
If the checks fail, it deletes itself from disk to prevent analysis ... Deletes itself after deployment to reduce forensic artefacts.
Creates a hidden directory named '.pkgdb' in the working directory and decodes three embedded binaries into it.
RushDrop ... Performs anti-VM and sandbox-evasion checks on execution. If the checks fail, it deletes itself from disk to prevent analysis. SilentRaid ... Anti-VM and anti-analysis checks on startup.
Annex B - MITRE ATT&CK Tactics and Techniques ... Discovery | T1083 | File and Directory Discovery.
ChronosRAT, a modular ELF binary that's capable of shellcode execution, file management, keylogging, port forwarding, remote shell, screenshot capture, and proxy.
4 indicators 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.
20 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
Malware family deployed in espionage-focused intrusions attributed to UAT-7290; details not provided in excerpt.
A malware family referenced as being used in espionage-focused intrusions by UAT-7290.
A specialized Linux-based dropper used by UAT-7290 on telecommunications edge devices. It performs anti-analysis checks and deploys additional malware components including DriveSwitch and SilentRaid.
A Linux dropper used at the start of a staged infection chain; it creates a hidden .pkgdb directory and deploys subsequent payload stages.
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.