Rungan
Rungan is a passive C++ backdoor. The provided content explicitly describes it as a "passive C++ backdoor called Rungan" and repeatedly associates it with the analytic story "GhostRedirector IIS Module and Rungan Backdoor." High-confidence context in the content links Rungan to Windows-focused detection and hunting coverage involving IIS component abuse, suspicious child processes spawned from web servers, Exchange web shell activity, SQL Server abuse, remote access software usage, suspicious PowerShell activity, curl-based ingress tool transfer, short-lived local accounts, privilege escalation, and msiexec network communication. The content does not provide a definitive initial infection vector, malware functionality beyond being a passive backdoor, specific threat actor attribution, targeted industries, or concrete indicators of compromise such as file hashes, domains, IPs, registry keys, or mutexes. Based on the available material, Rungan is best characterized as a Windows-associated backdoor tracked in conjunction with GhostRedirector-related intrusion analytics and post-exploitation behaviors on public-facing server infrastructure such as IIS, Exchange, Confluence, Ivanti, and SQL Server environments.
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Groups observed using it
4 distinct threat actors attributed by public researchers. Open in Mallory to see the full evidence chain and overlapping campaigns.
... led to the deployment of a passive C++ backdoor called Rungan ...
Detect Exchange Web Shell ... BlackByte Ransomware, Seashell Blizzard, GhostRedirector IIS Module and Rungan Backdoor
Detect Exchange Web Shell ... BlackByte Ransomware, Seashell Blizzard, GhostRedirector IIS Module and Rungan Backdoor
Detect Exchange Web Shell ... BlackByte Ransomware, Seashell Blizzard, GhostRedirector IIS Module and Rungan Backdoor
Techniques & procedures
1 distinct technique documented for this family, organized by ATT&CK tactic.
Persistence
1 technique"BadIIS ... Plants Web Shells"; "GhostRedirector ... native Internet Information Services (IIS) module"
Recent activity
26 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
Backdoor referenced in an associated analytic story.
Rungan is referenced as a backdoor in an associated analytic story.
Associated Analytic Story ... GhostRedirector IIS Module and Rungan Backdoor
Rungan is referenced as a backdoor associated with web server compromise and persistence.
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.