Bitter Hackers Deploy New PapRAT Backdoor in Cyberespionage Campaign Targeting South Asia
thehackernews.com Nov 9, 2026

Bitter Hackers Deploy New PapRAT Backdoor in Cyberespionage Campaign Targeting South Asia

AI-summarised brief · reviewed before publication

Bitter, a South Asian cyber‑espionage group, has deployed a new remote‑access trojan named PapRAT, featuring both C++ and Rust versions. The malware can execute commands, upload/download files, delete data, enumerate directories, capture screenshots, and run PowerShell scripts. It uses three infection chains: a living‑off‑the‑land script that harvests system data, a second script that retrieves logs from a separate domain, and a third that downloads an MSI installer to drop PapRAT and the older WmRAT. The campaign demonstrates refined, flexible access tactics.

💡 Why It Matters

  • · The use of multiple, script‑driven infection vectors shows how attackers can evade traditional signature‑based defenses, forcing organizations to scrutinize seemingly benign scripts and installers.