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DownPro is a Go-based Linux loader used by the Chinese-speaking Gambling Goblin cybercrime cluster following compromise of internet-facing web servers. It decrypts protected payload locations, retrieves additional components of the operator toolkit, and launches them on the compromised host. Reported follow-on payloads include the ChUser backdoor, PasswordHarvester credential stealer, AlphaAgent backdoor, oRAT remote-access trojan, and SSH credential-testing utilities. DownPro uses Linux-like naming to disguise deployed payloads. Gambling Goblin has used this post-compromise toolkit against Brazilian government, educational, commercial, healthcare, and media web infrastructure in a gambling-focused SEO-fraud and phishing operation. The cluster has been assessed as connected to Earth Berberoka with medium-to-high confidence. The initial-access mechanism for DownPro deployment has not been confirmed.
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2 distinct threat actors attributed by public researchers. Open in Mallory to see the full evidence chain and overlapping campaigns.
“Its toolkit includes DownPro, AlphaAgent, oRAT RAT, 3snake credential stealer, SSH brute-forcer, and reconnaissance tools.”
“Once inside, the group can use DownPro to fetch further payloads, including the ChUser backdoor, a password-harvesting tool, AlphaAgent, oRAT, and an SSH credential-testing utility.”
7 distinct techniques documented for this family, organized by ATT&CK tactic.
89 indicators attributed across vendor reports, sandbox runs, and researcher write-ups. Full values are available in Mallory.
IPs, domains, and DNS infrastructure linked to this family.
File hashes (MD5, SHA-1, SHA-256) from samples and reports.
7 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A named component of Gambling Goblin's toolkit used in compromises of Brazilian Linux servers supporting SEO-poisoning and phishing operations.
A loader used after access to retrieve and deploy follow-on payloads, including ChUser, AlphaAgent, and oRAT.
A downloader/loader used after compromise to retrieve additional payloads, including backdoors, credential-harvesting tools, and remote-access malware.
A payload downloader used after compromise to retrieve additional tooling, including backdoors, credential-harvesting tools, and remote-access malware.
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.