U.S. CISA adds TP-Link Archer C7(EU) and TL-WR841N flaws to its Known Exploited Vulnerabilities catalog
Source: https://securityaffairs.com/181886/hacking/u-s-cisa-adds-tp-link-archer-c7eu-and-tl-wr841n-flaws-to-its-known-exploited-vulnerabilities-catalog.html
Proofpoint researchers have observed an increase in cybercriminals using Stealerium-based malware, an open-source infostealer available on GitHub. Multiple stealers share code with Stealerium, including Phantom Stealer. Campaigns delivering Stealerium have used various lures and file types, targeting industries like hospitality, education, and finance. The malware can exfiltrate a wide range of data, including browser credentials, credit card info, and crypto wallet data. It uses anti-analysis techniques and can exfiltrate data through multiple channels like SMTP, Discord, and Telegram. The rise in Stealerium usage reflects the growing trend of threat actors pivoting to information stealers as identity theft becomes a priority.
A global malware infection of Windows computers has been uncovered, stemming from software users installed themselves. The malware, disguised as legitimate PDF editors and manual finders, turns infected systems into residential proxies for malicious actors. The infection chain starts with deceptive ads posing as PDF manuals. The campaign, which appears to have ceased, was widespread due to large-scale advertising. The malware creates scheduled tasks, executes JavaScript files, and communicates with various C2 domains. It's potentially linked to the OneStart Browser, known for spreading spyware and adware. Authorities advise blocking access to related domains, checking for specific applications, and removing software signed by certain certificate issuers.
LAB52 has identified a new backdoor called NotDoor, attributed to APT28, a Russian intelligence-linked threat group. NotDoor is a VBA macro for Outlook that monitors incoming emails for specific trigger words, enabling data exfiltration, file uploads, and command execution on victim computers. The backdoor is deployed via Microsoft OneDrive.exe using DLL side-loading, and it establishes persistence by modifying registry keys. NotDoor employs obfuscation techniques and a custom string encoding method. It can execute commands, exfiltrate files, and upload files to the victim's machine. The malware demonstrates APT28's continuous evolution in bypassing defense mechanisms, posing a significant threat to NATO member countries across various sectors.
Multiple Russia-linked influence operations are targeting Moldova's September 2025 parliamentary elections, aiming to destabilize the process and impede Moldova's EU accession. These operations, including Operation Overload, Operation Undercut, Foundation to Battle Injustice, and Portal Kombat, are projecting negative views of President Maia Sandu and the ruling Party of Action and Solidarity. They portray EU integration as disastrous for Moldova's economy and sovereignty, while suggesting closer ties with Russia as a favorable alternative. The operations employ various tactics, including inauthentic news content, social media manipulation, and automated content generation. While their impact on voter behavior appears limited so far, they pose risks to media integrity and public trust.
Disney to pay $10M to settle claims it collected kids’ data on YouTube
Source: https://www.bleepingcomputer.com/news/security/disney-to-pay-10m-to-settle-claims-it-collected-kids-data-on-youtube/
Google fixes actively exploited Android flaws in September update
Source: https://www.bleepingcomputer.com/news/security/google-fixes-actively-exploited-android-flaws-in-september-update/
This report details the analysis of RapperBot, a sophisticated botnet targeting IoT devices, particularly Network Video Recorders (NVRs). The malware exploits vulnerabilities in these devices to create a large-scale DDoS infrastructure. The analysis covers the botnet's infection process, command and control mechanisms, and its evolution over time. Key features include the use of NFS for malware distribution, encrypted DNS TXT records for C2 communication, and a wide range of supported device architectures. The report also discusses recent law enforcement actions against the botnet and provides recommendations for protection against such threats.
Inf0s3c Stealer is a sophisticated Python-based malware designed to collect system information and user data. It systematically gathers host identifiers, CPU information, network configuration, and captures screenshots. The malware enumerates running processes, generates directory views, and compiles stolen data into a password-protected archive for exfiltration. It employs various techniques for persistence, including injection into Discord and Windows Startup manipulation. The stealer targets sensitive information such as passwords, cookies, browsing history, and cryptocurrency wallets. It also implements anti-VM checks and can self-delete after execution. The analysis reveals similarities with other malware projects, suggesting potential for rapid iteration and wider distribution.
Researchers Warn of MystRodX Backdoor Using DNS and ICMP Triggers for Stealthy Control
Source: https://thehackernews.com/2025/09/researchers-warn-of-mystrodx-backdoor.html
Lazarus Group Expands Malware Arsenal With PondRAT, ThemeForestRAT, and RemotePE
Source: https://thehackernews.com/2025/09/lazarus-group-expands-malware-arsenal.html
Just published a breakdown of RapperBot. Quick hits:
Uses DNS TXT records to hide rotating C2s.
Multi-arch payloads (MIPS, ARM, x86), stripped/encrypted, self-deleting.
Custom base56 + RC4-ish routine just to extract C2 IPs (decryptor included).
Infra shifts fast: scanners moving countries, repos/FTP/NFS hosting binaries.
Timeline lines up neatly with DOJ’s Operation PowerOFF takedown.
Full post: [https://www.bitsight.com/blog/rapperbot-infection-ddos-split-second](https://www.bitsight.com/blog/rapperbot-infection-ddos-split-second)
Curious if anyone’s still seeing RapperBot traffic after the takedown, or if it’s really gone quiet.
Deep Specter Research Uncovers a Global Phishing Empire
Source: https://reporter.deepspecter.com/the-cloak-and-the-dagger-how-google-and-cloudflare-missed-a-global-phishing-empire-ed7176ebf82f
