Op Neusploit: Russian APT28 Uses Microsoft Office Flaw in Malware Attacks

A new campaign by the Russian-linked group APT28, called Op Neusploit, exploits a Microsoft Office flaw to steal emails for remote control of devices in Ukraine, Slovakia, and Romania...

APT28 Uses Microsoft Office CVE-2026-21509 in Espionage-Focused Malware Attacks

The Russia-linked state-sponsored threat actor known as APT28 aka UAC-0001 has been attributed to attacks exploiting a newly disclosed security flaw in Microsoft Office as part of a campaign codenamed Operation Neusploit. Zscaler ThreatLabz said it observed the hacking group weaponizing the...

Russia-Aligned Hackers Abuse Viber to Target Ukrainian Military and Government

The Russia-aligned threat actor known as UAC-0184 has been observed targeting Ukrainian military and government entities by leveraging the Viber messaging platform to deliver malicious ZIP archives. "This organization has continued to conduct high-intensity intelligence gathering activities again...

PT-2025-48392

Name of the Vulnerable Software and Affected Versions WinRAR versions prior to the fix for CVE-2025-80880 Description A wiper named GamaWiper, based on VBScript, has been identified in attacks targeting Ukraine. The initial access is gained through the exploitation of a vulnerability in WinRAR. T...

Viasat and the terrible, horrible, no good, very bad day

Welcome to this week's edition of the Threat Source newsletter. A year ago, fresh off a layoff, I never would have guessed I'd be spending Halloween weekend bouncing between conversations about space policy, satellite hacking, and wedding plans. That's exactly what happened when my space analyst...

Chatbots Are Pushing Sanctioned Russian Propaganda

ChatGPT, Gemini, DeepSeek, and Grok are serving users propaganda from Russian-backed media when asked about the invasion of Ukraine, new research finds...

Ukraine Aid Groups Targeted Through Fake Zoom Meetings and Weaponized PDF Files

Cybersecurity researchers have disclosed details of a coordinated spear-phishing campaign dubbed PhantomCaptcha targeting organizations associated with Ukraine's war relief efforts to deliver a remote access trojan that uses a WebSocket for command-and-control C2. The activity, which took place o...

Securing U.S. Critical Infrastructure: Lessons from Stuxnet and the Ukraine Power Grid Attacks

Industrial Control Systems ICS underpin the United States' critical infrastructure, managing essential services such as power, water, and transportation that are vital to national security and public safety. However, increasing digital integration has exposed these systems to escalating cyber...

Fake Ukraine Police Notices Spread New Amatera Stealer and PureMiner

FortiGuard Labs exposes a high-severity phishing campaign impersonating the National Police of Ukraine to deliver Amatera Stealer data theft and PureMiner cryptojacking to Windows PCs...

Russian Hackers Gamaredon and Turla Collaborate to Deploy Kazuar Backdoor in Ukraine

Cybersecurity researchers have discerned evidence of two Russian hacking groups Gamaredon and Turla collaborating together to target and co-comprise Ukrainian entities. Slovak cybersecurity company ESET said it observed the Gamaredon tools PteroGraphin and PteroOdd being used to execute Turla...

CountLoader Broadens Russian Ransomware Operations With Multi-Version Malware Loader

Cybersecurity researchers have discovered a new malware loader codenamed CountLoader that has been put to use by Russian ransomware gangs to deliver post-exploitation tools like Cobalt Strike and AdaptixC2, and a remote access trojan known as PureHVNC RAT. "CountLoader is being used either as par...

Exposing PathWiper: DCOM Abuse and Network Erasure

Exposing PathWiper: A Deep Dive into DCOM Abuse and Network Erasure With Trellix NDR By Maulik Maheta and Lishoy Mathew · August 12, 2025 Executive summary Ukraine’s national energy and telecommunications infrastructure was the primary targets of the PathWiper attack in 2025. The attack was...

CERT-UA Warns of HTA-Delivered C# Malware Attacks Using Court Summons Lures

The Computer Emergency Response Team of Ukraine CERT-UA has warned of cyber attacks carried out by a threat actor called UAC-0099 targeting government agencies, the defense forces, and enterprises of the defense-industrial complex in the country. The attacks, which leverage phishing emails as an...

CERT-UA Warns of HTA-Delivered C# Malware Attacks Using Court Summons Lures

The Computer Emergency Response Team of Ukraine CERT-UA has warned of cyber attacks carried out by a threat actor called UAC-0099 targeting government agencies, the defense forces, and enterprises of the defense-industrial complex in the country. The attacks, which leverage phishing emails as an...

XSS.IS Cybercrime Forum Seized After Admin Arrested in Ukraine

XSS.IS has been seized after its admin was arrested in Ukraine, however its dark web and mirror domains only show a 504 Gateway Timeout error...

Suspected Admin of XSS.IS Cybercrime Forum Arrested in Ukraine

Suspected admin of XSS.IS, a major Russian-language cybercrime forum, arrested in Ukraine after years of running malware and data trade operations...

GitHub Abused to Spread Amadey, Lumma and Redline InfoStealers in Ukraine

Hackers abused fake GitHub accounts to spread Emmenhtal, Amadey, Lumma and Redline infoStealers in attacks linked to a phishing campaign targeting Ukraine in early 2025...

New PathWiper Malware Strikes Ukraine’s Critical Infrastructure

Cisco Talos discovers PathWiper, a destructive new malware targeting critical infrastructure in Ukraine, highlighting ongoing cyber threats amidst the Russia-Ukraine conflict...

New PathWiper Data Wiper Malware Disrupts Ukrainian Critical Infrastructure in 2025 Attack

A critical infrastructure entity within Ukraine was targeted by a previously unseen data wiper malware named PathWiper, according to new findings from Cisco Talos. "The attack was instrumented via a legitimate endpoint administration framework, indicating that the attackers likely had access to t...

Newly identified wiper malware “PathWiper” targets critical infrastructure in Ukraine

Cisco Talos observed a destructive attack on a critical infrastructure entity within Ukraine, using a previously unknown wiper we are calling "PathWiper". The attack was instrumented via a legitimate endpoint administration framework, indicating that the attackers likely had access to the...