Threat Intelligence Database

Acunetix 25.11.251107123 for Windows contains a local privilege escalation vulnerability in the Web Vulnerability Scanning Engine (wvsc.exe) that allows low-privileged local attackers to execute arbitrary code as SYSTEM by exploiting a missing hardcoded directory path for OpenSSL-related files. Attackers can create the missing directory, place a malicious file at the expected path, and cause the SYSTEM-level wvsc.exe process to load and execute it, resulting in full privilege escalation.

A sophisticated multi-stage intrusion campaign was identified leveraging a weaponized PowerShell payload disguised as a JPEG image file (sysupdate.jpeg) to deploy a trojanized ConnectWise ScreenConnect instance for covert remote access. The attack likely originates through social engineering techniques including phishing emails or malicious attachments. Upon execution, the malware establishes a staging environment, retrieves additional payloads from attacker-controlled infrastructure, and dynamically compiles a custom launcher using Microsoft's legitimate .NET compiler (csc.exe) to evade detection. The intrusion abuses ComputerDefaults.exe and a malicious ms-settings registry hijack to perform a fileless UAC bypass and obtain elevated privileges. Once elevated, the malware deploys a persistent service masquerading as OneDriveServers and launches a modified ScreenConnect framework capable of credential interception, remote command execution, surveillance operations, SYSTEM-level execution, encrypted command...

A security flaw has been discovered in IObit Advanced SystemCare 19. This affects an unknown part of the file ASC.exe of the component Service. The manipulation results in symlink following. Attacking locally is a requirement. This attack is characterized by high complexity. It is indicated that the exploitability is difficult. The exploit has been released to the public and may be used for attacks.

A new malware loader discovered in May 2025 executes two malware families: TorNet and PureHVNC. The loader uses API hashing with MurmurHash2 and implements persistence through registry modifications. It decrypts and decompresses payloads using AES-128-ECB and LZMA, then injects them into a suspended jsc.exe process. TorNet, a downloader malware, communicates via TOR network, while PureHVNC is a commercial RAT allowing remote access. Both malware use Protocol Buffers for configuration deserialization. The loader's unique characteristics include its dual payload execution and API hashing implementation, indicating potential future attack techniques.

MediumMalwareGermanyFranceUnited Kingdom+4#purehvnc#loader#murmurhash2

The Altiris Core Agent Updater package (AeXNSC.exe) is prone to an elevation of privileges vulnerability through DLL hijacking.

HighVulnerabilityGermanyFranceUnited Kingdom+5#cve#cve-2025-9059#cwe-427

Cybercriminals are exploiting the US tax season to deploy Stealerium malware, targeting citizens through sophisticated phishing campaigns. The attack utilizes deceptive email attachments with malicious LNK files, leading to the execution of PowerShell scripts and the download of a PyInstaller-packaged executable. This payload injects into mstsc.exe and deploys Stealerium, an information-stealing malware that exfiltrates sensitive data from browsers, cryptocurrency wallets, and popular applications. The malware employs anti-analysis techniques, creates a hidden directory, and registers with a command and control server. It steals credentials from various sources, including browsers, gaming platforms, and messaging apps, while also capturing webcam images and Wi-Fi passwords.

MediumMalwareGermanyFranceNetherlands+5#tax-season phishing#stealerium#powershell