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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 · 6d agoMalware in the wild1

US Customs supervisor busted for stealing hardware from Homeland Security PCs

FBI arrested CBP supervisor Terry Liu for swapping CPUs, RAM and drives in 46 DHS computers and trading stolen parts via Newegg.

The FBI arrested and charged CBP supervisor Terry "Jiajia" Liu of Calais, Maine, with theft of government property after hidden cameras captured hardware swaps on midnight shifts. Investigators found 39 processors replaced, six memory modules swapped, and eight hard drives changed across 46 DHS computers at three Maine border facilities, with original Intel 14th-gen Raptor Lake Refresh chips downgraded to older, sometimes Pentium-class parts. Liu traded in the stolen Core i7 chips 16 times via Newegg's trade-in program over 14 months for roughly $200-210 each. Restoring the stolen hardware is estimated at $20,460, with full replacement around $105,800.

Hacker News · security · 3d agoPolicy & legalHN 22↑ · 12 comments2· 1 read

New hardware device can RAM into encrypted memory, expose your data

Researchers built a $200 DDR5 interposer that silently drops memory writes to break TDX, SGX, and SEV-SNP confidential VM integrity, requiring physical access.

Researchers from KU Leuven, ETH Zurich, Durham University, and Google demonstrated DDRop, a hardware interposer costing under $200 that corrupts DDR5 bus commands to silently drop writes to encrypted memory, enabling replay attacks on confidential VMs. Because scalable memory encryption lacks freshness checks, protected VMs keep computing on stale attacker-selected data; on an Intel TDX server the attack forces debug mode for plaintext memory reads or forges attestation reports, succeeding in under two minutes without crashing. Intel and AMD both called the attack out of scope for their cloud threat models, with no mitigation planned, and proposed cache line versioning appears still vulnerable. The full interposer design is being released as open-source hardware.

The Register · Security · 2d agoResearch

USN-8750-1: FFmpeg vulnerabilities

Ubuntu USN-8750-1 fixes multiple FFmpeg memory-handling flaws that allow denial of service via crafted files.

Ubuntu Security Notice USN-8750-1 patches several FFmpeg vulnerabilities related to incorrect memory operations, reported by Seung Min Shin, Xinghang Lv, and others. If a user or automated system is tricked into opening a specially crafted file, an attacker could cause a denial of service. Affected CVEs include CVE-2026-12706, CVE-2026-30999, and CVE-2026-58049.

Ubuntu Security Notices · 3d agoAdvisoryCVE-2026-12706CVE-2026-30999CVE-2026-58049