Latest cybersecurity reporting from selected sources.

The Russian hacking group known as Gamaredon has been attributed to the continued exploitation of a WinRAR vulnerability to deliver multiple malware families aimed at data theft and propagation

GREYVIBE, a Russia-linked group active since 2025, targets Ukraine with AI-assisted malware and five attack chains. Researchers say it’s part spy op, part crime gang. Security firm WithSecure has been tracking a previously unknown Russian-linked APT group called GREYVIBE since at least August 2025. The group targets Ukraine and Ukrainian-related organizations across military, government, civilian, […]

The Russian state-sponsored hacking group tracked as APT28 has been observed using a pair of implants dubbed BEARDSHELL and COVENANT to facilitate long‑term surveillance of Ukrainian military personnel

A previously undocumented threat actor has been attributed to attacks targeting Ukrainian organizations with malware known as CANFAIL

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

The Computer Emergency Response Team of Ukraine (CERT-UA) has disclosed details of new cyber attacks targeting its defense forces with malware known as PLUGGYAPE between October and December 2025

Sandworm deployed data wipers against Ukrainian governmental entities and companies in the energy, logistics and grain sectors

Nation-State Teams Tied to Grain Sector Targeting, Plus More Joined-Up OperationsRussia's nation-state hacking groups have returned to pummeling Ukrainian targets with destructive, wiper malware, including in apparent attempts to disrupt its economically valuable grain sector, alongside the repeat targeting of allied European nations, researchers report.

First-Ever Malware Tie-Up Spotted Between FSB's Turla and Gamaredon Hacking GroupsTwo long-running advanced persistent threat groups tied to Russia's Federal Security Service, the FSB, called Turla and Gamaredon, appear for the first time to be running a joint cyberespionage operation using their separate malware arsenals, designed to hit high-value targets in Ukraine.

Aeroflot Hit With Wiper Malware, Claim Pro-Ukrainian Hackers From BelarusRussia's largest airline, Aeroflot, canceled dozens of flights on Monday and delayed more due to an IT disruption. Two pro-Ukrainian hacking groups from Belarus claimed to have wiped stolen extensive customer data before wiping 7,000 physical and virtual servers used by the airline.

Also: Signal Blocks Recall, Europe Sanctions Stark IndustriesThis week, Qakbot leader indicted, Signal blocked Recall and a judge said Trump illegally removed watchdogs. Ivanti and Palo Alto hacks linked, Stark Industries sanctioned, Marks and Spencer's hack costs 300M pounds. Pro-Ukraine hackers hit a Russian clinic and an outbreak of PureRAT in Russia.

Posing as an application used to locate Ukrainian military recruiters, a Kremlin-backed hacking initiative delivers malware, along with disinformation designed to undermine sign-ups for soldiers in the war against Russia.

Russian Hackers Using Open-Source Malware on Popular Messaging Apps, Report SaysUkraine's Computer Emergency Response Team is warning in an April report that a Russian hacking group known as UAC-0184 is using open-source malware to target Ukrainian soldiers on popular messaging apps such as Signal, as concerns grow over the Kremlin’s advanced hacking capabilities.

Also: Cloudflare Was Hacked With Stolen Okta TokenThis week, former CIA programmer gets 40-year sentence, zero trust prevents widespread damage, possible ransomware attack in Georgia, alleged hacker detained in Ukraine, USB-spread malware in Italy, LockBit attack on non-bank home mortgage lender, and Ukrainian critical infrastructure disrupted.

Microsoft and the Ukraine CERT warn of new attacks by the Russian state-sponsored Turla hacking group, targeting the defense industry and Microsoft Exchange servers with a new 'DeliveryCheck' malware backdoor. [...]

The Russian state-sponsored hacking group 'APT29' (aka Nobelium, Cloaked Ursa) has been using unconventional lures like car listings to entice diplomats in Ukraine to click on malicious links that deliver malware. [...]

The Russian state-sponsored hacking group Gamaredon (aka Armageddon, or Shuckworm) continues to target critical organizations in Ukraine's military and security intelligence sectors, employing a refreshed toolset and new infection tactics. [...]

The Russian hacking group known as 'Nodaria' (UAC-0056) is using a new information-stealing malware called 'Graphiron' to steal data from Ukrainian organizations. [...]

The Russian state-sponsored hacking group known as Sandworm has been observed masquerading as telecommunication providers to target Ukrainian entities with malware. [...]

Researchers who helped thwart the Russian nation-state group's recent attack on Ukraine's power supply will disclose at Black Hat USA what they found while reverse-engineering the powerful Industroyer2 malware used by the powerful hacking team.