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Redtail Payload Analysis [Guest Diary], (Wed, Sep 9th)

SANS guest analyst detonated a RedTail Linux sample from a DShield honeypot, finding process masquerading as php-fpm, monitoring-kill behavior, and a TCP listener.

A DShield honeypot captured multi-architecture RedTail Linux executables (ARM, ARM64, i686, RISC-V, x86-64) deployed via shell scripts. Dynamic analysis of the UPX-packed, statically linked x86-64 sample (SHA-256 63be5f38...d35e) in an isolated Ubuntu 24.04 VM on Proxmox showed it renamed its process via prctl(PR_SET_NAME), killed a filesystem-monitoring process, and opened a TCP listening socket while surviving processes posed as php-fpm or PostgreSQL-like workers. Differential memory images pre- and post-execution were captured from the hypervisor for forensics.

SANS Internet Storm Center · 5d agoMalware in the wild 2 sources1

Any user process can escalate to root

A disclosed local privilege escalation flaw allows any user process to escalate to root on the affected system.

A Lobsters-linked security write-up describes a vulnerability in which any user process can escalate its privileges to root. The feed text provides no product name, CVE identifier, CVSS score, or exploitation details, limiting available detail. Local privilege escalation flaws are commonly chained with other issues for full system compromise, so defenders should review the full write-up for affected versions and patches.

Lobsters · security · 15d agoVulnerability

Cisco RoomOS Stack Overflow Vulnerability

Cisco fixed a stack overflow in the RoomOS USB driver allowing physical-access attackers to execute code with root privileges.

Insufficient boundary checks in the USB driver of Cisco RoomOS allow a buffer overflow when specific data is supplied through the USB port. An unauthenticated local attacker with physical access can connect a malicious USB device and execute arbitrary code with root privileges. Cisco has released software updates and no workarounds address the issue.

Cisco Security Advisories · 27d agoAdvisory