ZeroHour

Search: “optimization”

7 stories in the last 30d

Researchers Uncover 10,000+ Malware Loaders Behind YouTube and SEO Poisoning Campaign

Unit 42 uncovers CL-CRI-1171, a two-year pay-per-install campaign distributing 10,000+ OfferLoader samples via YouTube and SEO poisoning.

Palo Alto Networks Unit 42 tracked a campaign as CL-CRI-1171, an infection-as-a-service platform operating for at least two years. It used 11 YouTube gaming channels with hundreds of thousands of subscribers and SEO-poisoned download pages for trojanized WinDirStat and Bluetooth driver installers to distribute OfferLoader, a disposable loader embedded in Inno Setup installers. Payloads delivered included Insomnia RAT (Node.js and Python backdoors), ARKTunnel (a WebSocket-based RAT using LSB steganography), and Docro Hijacker (Chrome browser hijacker), with later infections delivering GCleaner and Socks5Systemz. Over 200 rotating domains across .xyz, .cfd, .space, and .info TLDs were used, with gating filters that served broken links or decoy pages to scanners and researchers.

GBHackers · 5d agoMalware in the wild2

Untracked Nightmares: The Threats Hiding Behind Commodity Infrastructure

Unit 42 exposes CL-CRI-1171, a pay-per-install network spreading malware like Insomnia RAT via YouTube channels and SEO poisoning for over two years.

Palo Alto Networks Unit 42 details CL-CRI-1171, a cybercrime cluster operating a pay-per-install (PPI) marketplace that has delivered multiple malware families for at least two years. The group used at least eleven YouTube gaming channels with hundreds of thousands of followers, plus SEO poisoning promoting trojanized software such as a Bluetooth driver and WinDirStat, infecting gamers and corporate endpoints including critical infrastructure and government entities. A single shared loader delivered payloads including Insomnia RAT, ARKTunnel, Docro Hijacker, GCleaner and Socks5Systemz between July 2025 and April 2026, with more than 10,000 distinct loader samples and over 200 rotating C2 domains identified. YouTube terminated the malicious channels after Unit 42 notified the platform.

Palo Alto Unit 42 · 7d agoMalware in the wild1

Hackers Abuse YouTube Gaming Channels and SEO Poisoning to Deploy RATs and Chrome Hijacker

Unit 42 exposed CL-CRI-1171, a pay-per-install operation using YouTube gaming channels and SEO poisoning to deliver RATs and a Chrome hijacker.

Palo Alto Networks Unit 42 identified over 10,000 OfferLoader samples and 11 YouTube channels pushing trojanized installers via gaming lures and SEO-poisoned searches for tools like WinDirStat and Bluetooth drivers. Trojanized Inno Setup installers spawn three payload branches: Insomnia RAT (dual Node.js/Python backdoor that disables Microsoft Defender), ARKTunnel (undocumented RAT hiding its payload in a bitmap image and tunneling TCP/UDP), and Docro Hijacker (alters Chrome protected preferences to hijack search and affiliate links). The pay-per-install model sells each infection to multiple buyers, reaching gamers as well as corporate and government endpoints.

Cyber Security News · 2d agoMalware in the wild1

Android malware creates a hidden copy of your banking app

Group-IB found the Gigabud Android banking trojan clones banking apps into a hidden work profile to conduct fraud undetected.

Group-IB researchers found the Gigabud Android banking trojan installs Vwork, a trojanized version of the open-source Shelter app, to create a separate Android work profile and clone the victim's banking app into it. The operator then performs fraudulent transactions from the cloned app, separating risky activity from malware detections in the personal profile and potentially bypassing bank-side anti-fraud checks. Victims are lured into sideloading fake airline, tax, or government apps via phishing sites and messages, then grant Accessibility, overlay, and battery-optimization permissions that enable remote control and credential-theft overlays. Malwarebytes detects Gigabud components under multiple Android.Trojan.Banker signatures.

Malwarebytes Labs · 5d agoMalware 3 sources

GoldFactory Weaponizes Open-Source Vwork App Cloner in Gigabud Banking Malware Attacks

Group-IB says GoldFactory's Gigabud Android trojan uses Vwork, a weaponized Shelter fork, to clone banking apps into isolated Work Profiles and evade bank-side detection.

Group-IB's 'Hook for Gold' investigation found GoldFactory ships Vwork, a modified fork of the open-source Shelter app, alongside its Gigabud Android banking trojan, active since 2022. Vwork abuses Android Work Profile provisioning to clone banking apps into an isolated environment, weakening the link between detected malware signals and fraudulent transactions. Gigabud has targeted victims in Southeast Asia, Latin America, the Middle East, Africa, and beyond via fake airline, tax, and government apps requesting Accessibility and overlay permissions. In Indonesia, telemetry recorded about 1,469 compromised devices and roughly $960,939 in estimated losses between February and July 2026.

GBHackers · 7d agoMalware in the wild

Threats Making WAVs - Incident Response to a Cryptomining Attack

Guardicore researchers dissect a cryptomining attack that hid a cryptominer inside WAV files, mapping the full infection chain and response steps.

Guardicore security researchers present a full analysis of a cryptomining attack that concealed a cryptominer inside WAV audio files. The report documents the complete attack chain from detection through infection, network propagation, and malware analysis. It also includes recommendations for optimizing incident response processes in data centers.

Akamai Blog · 8d agoMalware in the wild

ToxicPanda 2.0 and GoldDigger Expand Android Banking Attacks with On

Zimperium and IBM Trusteer report expanded ToxicPanda 2.0 and GoldDigger Android banking trojan campaigns now targeting 349 financial institutions across 16 countries.

Zimperium zLabs reports ToxicPanda 2.0 (TgToxic) now carries 167 remote commands, targets 349 financial institutions across 16 countries via more than 140 banking and cryptocurrency apps, and abuses Android Wireless Debugging via ADB for privilege escalation and shell access. It harvests lock screen PINs with fake overlays, steals UI elements via accessibility services, sets Device Administrator privileges, and is distributed through Amazon AWS-hosted buckets. IBM Trusteer documents a GoldDigger campaign impersonating airline companies and shopping retailers, causing massive infections in South Africa and the U.K., obfuscated with the dpt-shell packer that detects Frida and resists debugging. GoldDigger performs on-device fraud by injecting input into banking apps and is attributed to the Chinese-speaking GoldFactory actor.

The Hacker News · 23d agoMalware in the wild