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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.
Specifically, they use publicly available PHP webshells named WSO webshell and c99shell.
10 distinct techniques documented for this family, organized by ATT&CK tactic.
PHP/c99shell or simply c99shell should be well known by now - it is a PHP backdoor that provides a lot of functionality, for example: run shell commands; download/upload files from and to the server (FTP functionality); full access to all files on the hard disk; self-delete functionality.
12 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.
3 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A PHP webshell/backdoor that gives attackers extensive control over a compromised web server, including command execution, file upload/download, full file-system access, and self-deletion. The post discusses an updated version 2.1 found on a hacked website.
Public PHP webshell used for persistent/backup access on internet-facing web servers; observed with multiple layers of obfuscation/encryption.
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.