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GhostWebShell is a web shell observed on an external-facing web server during a Medusa ransomware intrusion. Compiled artifacts were present in the ASP.NET temporary-compilation environment on a Windows server. It was deployed alongside other web shells to maintain attacker access following exploitation of a vulnerable public-facing application. GhostWebShell code has also been incorporated into the GhostContainer .NET backdoor.
Mallory pivots from this family to the IOCs, detections, and named campaigns that touch your stack, and pages you when something new lands.
1 distinct threat actor attributed by public researchers. Open in Mallory to see the full evidence chain and overlapping campaigns.
GhostContainer ... includes elements connected to the Neo-reGeorg tunnel, code for CVE-2020-0688, and the GhostWebShell class.
1 distinct technique documented for this family, organized by ATT&CK tactic.
4 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A named web-shell component/class included in the GhostContainer Exchange backdoor.
A web-shell component/class included in the GhostContainer backdoor's public-component assembly.
Web-shell component incorporated into GhostContainer.
A fileless web shell used to maintain persistent remote access on compromised web servers; compiled versions were found in temporary ASP.NET files.
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.