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GOLDTOMB is a backdoor associated with financially motivated intrusion activity linked to FIN11 and UNC5936. It has been observed in operations targeting enterprise software and data-rich environments, including campaigns exploiting managed file transfer products and Oracle E-Business Suite. Reporting on Oracle EBS intrusions identified code overlap between a campaign payload and a command-line module present in GOLDTOMB, indicating tooling continuity with earlier FIN11-associated operations.
GOLDTOMB is used as post-compromise malware rather than an initial exploit. It is associated with intrusion chains in which attackers exploit internet-facing enterprise applications, establish footholds, and deploy follow-on tooling for remote access and operational control. In related campaigns, operators used servlet and template-injection-based exploitation to execute code, deploy in-memory backdoors and web shells, conduct reconnaissance, and support data-theft-driven extortion activity. GOLDTOMB has also been referenced alongside the GOLDVEIN downloader and other Java-based payloads used in exploitation campaigns attributed to UNC5936.
The malware is most strongly tied to Windows-oriented FIN11 tradecraft, although observed campaign context also includes Java-based tooling used against server-side enterprise applications. Its known role is that of a backdoor enabling post-exploitation access and operator tasking in financially motivated attacks focused on high-value organizational data.
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2 distinct threat actors attributed by public researchers. Open in Mallory to see the full evidence chain and overlapping campaigns.
The GOLDVEIN.JAVA downloader used in EBS attacks is reminiscent of the GOLDVEIN downloader and GOLDTOMB backdoor deployed by UNC5936 during the mass exploitation of the Cleo MFT vulnerability in late 2024.
The GOLDVEIN.JAVA downloader used in EBS attacks is reminiscent of the GOLDVEIN downloader and GOLDTOMB backdoor deployed by UNC5936 during the mass exploitation of the Cleo MFT vulnerability in late 2024.
1 distinct technique documented for this family, organized by ATT&CK tactic.
3 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
Backdoor mentioned as related tooling previously deployed by UNC5936 and used for comparison to Oracle EBS attack tradecraft.
Referenced as malware previously used by FIN11/UNC5936 in 2024 Cleo MFT exploitation; this reporting notes technical links/overlap with the Oracle EBS campaign but does not describe functionality here.
GOLDTOMB is a backdoor associated with FIN11, used for persistent access and command execution on compromised systems.
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Named campaigns wielding this family, with evidence pinned to each claim.
CVEs this family uses for access and lateral movement.
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Reddit, Mastodon, and CTI community discussion around this family.