cybersecurity researchers Archives

AppWizard

May 9, 2026

Fake Call History Apps Stole Payments From Users After 7.3 Million Play Store Downloads

Cybersecurity researchers from ESET have discovered 28 fraudulent applications on the Google Play Store that falsely claimed to provide access to call histories for any phone number. These apps have been downloaded over 7.3 million times, with one app alone accounting for over 3 million downloads. The operation, named CallPhantom, primarily targeted Android users in India and the Asia-Pacific region. Users were lured into subscription services, paying for access to fictitious data, including call histories and SMS records, but received only randomly generated information. Some apps were published under the developer name "Indian gov.in" to create a false sense of trust. Payments were processed through the Google Play Store or third-party applications like Google Pay and Paytm. Users who subscribed via Google Play may be eligible for refunds, while those who used third-party payment methods may not be able to recover their funds. The fraudulent activity may have been ongoing since at least November 2025.

BetaBeacon

May 5, 2026

ScarCruft hackers push BirdCall Android malware via game platform

APT37, also known as ScarCruft and Ricochet Chollima, has developed an Android version of the backdoor BirdCall, which serves as spyware in addition to a backdoor. The malware was delivered through a Chinese website that hosts games for Android, iOS, and Windows, targeting only Android and Windows systems. The Android variant of BirdCall has capabilities such as extracting IP geolocation information, collecting contact lists, call logs, SMS data, device information, taking screenshots, recording audio, and exfiltrating files. Users are advised to download software only from official marketplaces and trusted publisher sites to protect against malware infections.

Tech Optimizer

May 4, 2026

Wiz ZeroDay.Cloud Event Reveals 20-Year-Old PostgreSQL Vulnerabilities

Cybersecurity researchers at Wiz’s ZeroDay.Cloud event in London exploited two significant vulnerabilities in PostgreSQL, tracked as CVE-2026-2005 and CVE-2026-2006, which were disclosed on May 4, 2026. The vulnerabilities were found in the pgcrypto extension, affecting public-key decryption and symmetric decryption functions. CVE-2026-2005 allows privilege escalation via a buffer overflow during public-key decryption, while CVE-2026-2006 enables attackers to corrupt memory through inadequate checks in symmetric decryption. PostgreSQL has released patches for these vulnerabilities across versions 14.21 to 18.2, and MariaDB addressed a related issue in versions 11.4.10 and 11.8.6. Database administrators are advised to apply updates and audit logs for suspicious activity.

AppWizard

May 3, 2026

Telegram Mini Apps abused for crypto scams, Android malware delivery

Cybersecurity researchers have identified a fraud operation named FEMITBOT that exploits Telegram’s Mini App feature to conduct various crypto scams, impersonate reputable brands, and distribute Android malware. This operation uses a unique string in API responses and employs Telegram bots with embedded Mini Apps to create convincing app-like experiences. The scams include fraudulent cryptocurrency platforms and financial services, with impersonation of brands like Apple, Coca-Cola, Disney, eBay, IBM, Moon Pay, NVIDIA, and YouKu. The operation utilizes a shared backend infrastructure, allowing multiple phishing domains to use the same API response. Users interacting with the bots are shown phishing pages within Telegram’s WebView, often featuring fake balances and urgency tactics to prompt deposits or referrals. Additionally, some Mini Apps attempt to distribute malware disguised as legitimate Android APKs. Users are advised to be cautious when engaging with Telegram bots related to cryptocurrency investments and to avoid sideloading APK files.

Winsage

April 19, 2026

Windows Defender Security Flaws Actively Exploited by Hackers

Three vulnerabilities in Microsoft Defender, known as BlueHammer (CVE-2026-33825), RedSun, and UnDefend, are being actively exploited by hackers. BlueHammer has been patched, while RedSun and UnDefend remain unpatched. The public release of exploit code has accelerated real-world attacks, affecting Windows 10, Windows 11, and Windows Server systems. Attackers have begun exploiting these vulnerabilities, leading to concerns about privilege escalation, disruption of security updates, and the rapid spread of attacks.

AppWizard

April 17, 2026

New RecruitRat, SaferRat, Astrinox, Massiv Android Malware Found Targeting 800 Apps

Cybersecurity researchers from Zimperium zLabs have identified four families of Android malware—RecruitRat, SaferRat, Astrinox, and Massiv—targeting banking and cryptocurrency applications. These malware families can extract sensitive information from over 800 applications. They primarily use phishing and smishing to lure users into downloading malicious software. Phishing involves creating fake websites resembling legitimate login pages, while smishing uses urgent text messages with links to download harmful payloads. RecruitRat targets job seekers with fake employment websites, and SaferRat promises free access to premium video services. Astrinox mimics a business tool and has been linked to a fraudulent Apple App Store page, while Massiv's distribution methods remain unclear. Once installed, these malware applications initiate Overlay attacks, displaying counterfeit screens to capture user credentials. They also use a "blindfold" technique to obscure their activities by overlaying static images on the user's screen. The malware can intercept security codes, capture one-time passwords, and employ keylogging techniques. RecruitRat has a library of over 700 counterfeit login pages that activate with targeted apps. Researchers recommend avoiding links in urgent messages and downloading apps only from official sources.

Winsage

April 10, 2026

Windows Zero-Day Published on Github as Microsoft Fails to Act

A security researcher named Chaotic Eclipse published a working exploit for a Windows zero-day vulnerability, called BlueHammer, on GitHub on April 2. The exploit allows attackers to gain SYSTEM-level privileges by exploiting a race condition in Windows Defender’s signature update mechanism. The exploit has gained significant attention, with over 100 forks and nearly 300 stars on GitHub. Will Dormann, a principal vulnerability analyst, confirmed that while BlueHammer is functional, it may not always operate reliably. Microsoft has not issued a patch for this vulnerability. The exploit targets the Windows Defender signature update process, allowing low-privilege attackers to manipulate a file path during operation, leading to access to the Security Account Manager (SAM) database. Currently, only 8 out of 72 cybersecurity vendors on VirusTotal flag the exploit file as malicious, which raises concerns about detection coverage. Microsoft reiterated its commitment to coordinated vulnerability disclosure but did not address the communication issues regarding the BlueHammer report.

Tech Optimizer

April 6, 2026

36 Malicious npm Packages Exploited Redis, PostgreSQL to Deploy Persistent Implants

Cybersecurity researchers have discovered 36 malicious packages in the npm registry that impersonate Strapi CMS plugins. These packages exploit Redis and PostgreSQL, deploy reverse shells, harvest credentials, and establish persistent implants. Each package consists of three files—package.json, index.js, and postinstall.js—without descriptions or repositories, and all use version 3.6.8 to mimic legitimate Strapi plugins. The malicious packages follow a naming convention starting with "strapi-plugin-" and were uploaded by four accounts within 13 hours. The identified packages include names like strapi-plugin-cron, strapi-plugin-database, and strapi-plugin-server. The malicious code is embedded in the postinstall script, executing automatically upon installation with the same privileges as the user. The payloads evolve from exploiting Redis for remote code execution to attempting direct PostgreSQL database exploitation and deploying persistent implants for remote access. The campaign appears to target cryptocurrency platforms, as indicated by the focus on credential theft and digital assets. Users of these packages are advised to assume compromise and rotate credentials. This incident reflects a broader trend of supply chain attacks in the open-source ecosystem, with recent examples including credential exfiltration payloads in GitHub repositories and compromised GitHub Actions workflows. Group-IB reported that software supply chain attacks are increasingly reshaping the cyber threat landscape, targeting trusted vendors and open-source software to gain access to downstream organizations.

AppWizard

March 19, 2026

New Perseus Android Banking Malware Monitors Notes Apps to Extract Sensitive Data

Cybersecurity researchers have identified a new family of Android malware called Perseus, designed for device takeovers and financial fraud. It utilizes Accessibility-based remote sessions for real-time monitoring and interaction with infected devices, particularly targeting Turkey and Italy. Perseus monitors user notes to extract personal or financial information and is distributed through dropper applications via phishing websites. It expands on the codebase of previous malware like Phoenix and employs disguises as IPTV services to reduce user suspicion. Once operational, it performs overlay attacks and captures keystrokes to steal credentials from financial applications. The malware allows operators to issue commands through a command-and-control panel, enabling various malicious actions, including capturing note content and initiating remote visual streams. Perseus also conducts environment checks to evade detection and ensure it operates on legitimate devices.

AppWizard

March 12, 2026

Six Android Malware Families Target Pix Payments, Banking Apps, and Crypto Wallets

Cybersecurity researchers have identified six new families of Android malware designed to extract sensitive data and facilitate financial fraud. Notable threats include: - PixRevolution: Targets Brazil's Pix payment platform, activates during Pix transfers, and uses real-time monitoring to intervene in transactions. Victims are tricked into installing malicious apps from counterfeit Google Play Store listings, which enable accessibility services for the malware to capture screens and overlay fake interfaces to reroute funds. - BeatBanker: Spreads through phishing attacks disguised as legitimate Google Play Store pages. It uses an inaudible audio loop for persistence, functions as a banking trojan, and includes a cryptocurrency miner. It creates deceptive overlays for platforms like Binance and Trust Wallet to divert funds and can monitor web browsers and execute remote commands. - TaxiSpy RAT: Exploits accessibility services to gather sensitive information such as SMS messages and call logs, targeting banking and cryptocurrency applications with overlays for credential theft. It employs advanced evasion techniques like native library encryption and real-time remote control. - Mirax: A private malware-as-a-service (MaaS) offering with a subscription model that provides tools for banking overlays and information gathering, including keystrokes and SMS. - Oblivion: Another Android RAT available at a competitive price, featuring capabilities to bypass security measures on various devices. - SURXRAT: Distributed through a Telegram-based MaaS ecosystem, it uses accessibility permissions for persistent control and communicates with a Firebase-based command-and-control infrastructure. Some samples incorporate a large language model component, indicating experimentation with AI by threat actors.