The Malware tag covers malware families, infrastructure analysis, incident impact, disruption efforts, and defensive guidance to reduce cybersecurity risk.
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Background for this topic.
Malware is software intentionally created or modified to perform unauthorized or harmful actions on a computer, device, or network. The term covers distinct families and functions, including viruses, worms, trojans, spyware, botnet clients, and ransomware; a single sample may combine several capabilities. Its behavior—not its label—determines the security concern: it may execute code, persist, alter or encrypt data, steal credentials, or provide unauthorized remote access.
For practitioners, malware reporting is most useful when it identifies the family or tool conservatively and provides evidence such as affected platforms, samples, infrastructure, or observed behavior. Defenses include promptly patching vulnerable software, restricting execution and privileges, monitoring endpoints and networks, maintaining tested backups, and isolating suspected systems for analysis. Detection should use behavior and verified indicators rather than names alone, since variants change. If malware processes personal or regulated data, investigations should also address privacy, evidence preservation, and applicable reporting obligations.
The SOVA Android banking trojan continues to evolve with new features, code improvements, and the addition of a new ransomware feature that encrypts files on mobile devices. [...]
Versions of a cross-platform instant messenger application focused on the Chinese market known as 'MiMi' have been trojanized to deliver a new backdoor (dubbed rshell) that can be used to steal data from Linux and macOS systems. [...]
The CISA has seen a resurgence of the malware targeting a range of verticals and critical infrastructure organizations by exploiting RDP, firewall vulnerabilities.
We found APT group Iron Tiger's malware compromising chat application Mimi’s servers in a supply chain attack.
Identity of a real person was used to lend credence to a package that dropped cryptominer in memory Sonatype has unearthed yet more malware lurking on PyPI, this time a fileless Linux nasty designed to mine Monero and using the identity of a real person to lend credibility to the package.…
Threat actors associated with the Cuba ransomware have been linked to previously undocumented tactics, techniques and procedures (TTPs), including a new remote access trojan called ROMCOM RAT on compromised systems
A member of the Cuba ransomware operation is employing previously unseen tactics, techniques, and procedures (TTPs), including a novel RAT (remote access trojan) and a new local privilege escalation tool. [...]
The report shows an 11% rise in archive files containing malware, including LNK files
Product enhancements to offer full IT and OT threat intelligence services for OPSWAT customers.
New release also includes enterprise-grade cloud security posture management (CSPM) and YARA-based malware scanning capabilities.
The Emotet botnet continues to evolve and now includes a credit card stealer module
Malware and botnet detections also soar
Threat analysts have discovered ten malicious Python packages on the PyPI repository, used to infect developer's systems with password-stealing malware. [...]
Initial attacks used damaging wiper malware and targeted infrastructure, but the most enduring impacts will likely be from disinformation, researchers say. At Black Hat USA, SentinelOne's Juan Andres Guerrero-Saade and Tom Hegel will discuss.
Researchers have discovered more details on the newly discovered Android spyware 'Dracarys,' used by the Bitter APT group in cyberespionage operations targeting users from New Zealand, India, Pakistan, and the United Kingdom. [...]
The discovery adds to the growing list of recent incidents where threat actors have used public code repositories to distribute malware in software supply chain attacks.
An extensive series of attacks detected in January used new Windows malware to backdoor government entities and organizations in the defense industry from several countries in Eastern Europe. [...]
Facebook parent company Meta disclosed that it took action against two espionage operations in South Asia that leveraged its social media platforms to distribute malware to potential targets