Old WinRAR Flaw Fuels Attacks on Ukraine: How Unmanaged Software Keeps the Door Open

Two separate Russia-aligned campaigns are still exploiting the WinRAR flaw CVE-2025-8088 against Ukrainian organizations nearly a year after it was patched, showing how unmanaged software keeps an exploited entry point open long after the fix ships...

Google Ties Suspected Russian Actor to CANFAIL Malware Attacks on Ukrainian Orgs

A previously undocumented threat actor has been attributed to attacks targeting Ukrainian organizations with malware known as CANFAIL. Google Threat Intelligence Group GTIG described the hacking group as possibly affiliated with Russian intelligence services. The threat actor is assessed to have...

Russian Hackers Target Ukrainian Organizations Using Stealthy Living-Off-the-Land Tactics

Organizations in Ukraine have been targeted by threat actors of Russian origin with an aim to siphon sensitive data and maintain persistent access to compromised networks. The activity, according to a new report from the Symantec and Carbon Black Threat Hunter Team, targeted a large business...

Russia-Linked Gamaredon Uses Troop-Related Lures to Deploy Remcos RAT in Ukraine

Entities in Ukraine have been targeted as part of a phishing campaign designed to distribute a remote access trojan called Remcos RAT. "The file names use Russian words related to the movement of troops in Ukraine as a lure," Cisco Talos researcher Guilherme Venere said in a report published last...

CVE-2025-0411: Ukrainian Organizations Targeted in Zero-Day Campaign and Homoglyph Attacks

The Trend ZDI team offers an analysis on how CVE-2025-0411, a zero-day vulnerability in 7-Zip, was actively exploited to target Ukrainian organizations in a SmokeLoader campaign involving homoglyph attacks...

OfflRouter virus causes Ukrainian users to upload confidential documents to VirusTotal

During a threat-hunting exercise, Cisco Talos discovered documents with potentially confidential information originating from Ukraine. The documents contained malicious VBA code, indicating they may be used as lures to infect organizations. The results of the investigation have shown that the...

Destructive data wipers and worms targeting Ukrainian organizations

THREAT LEVEL: Red. For a detailed advisory, download the pdf file here Cybersecurity & Infrastructure Security Agency CISA and the Federal Bureau of Investigation FBI have jointly released an advisory and warned of an ongoing cyber attack using destructive malware targeting organizations in Ukrai...

ACTINIUM targets Ukrainian organizations

The Microsoft Threat Intelligence Center MSTIC is sharing information on a threat group named ACTINIUM, which has been operational for almost a decade and has consistently pursued access to organizations in Ukraine or entities related to Ukrainian affairs. MSTIC previously tracked ACTINIUM activi...

ACTINIUM targets Ukrainian organizations

The Microsoft Threat Intelligence Center MSTIC is sharing information on a threat group named ACTINIUM, which has been operational for almost a decade and has consistently pursued access to organizations in Ukraine or entities related to Ukrainian affairs. MSTIC previously tracked ACTINIUM activi...

Destructive malware targeting Ukrainian organizations

Microsoft Threat Intelligence Center MSTIC has identified evidence of a destructive malware operation targeting multiple organizations in Ukraine. This malware first appeared on victim systems in Ukraine on January 13, 2022. Microsoft is aware of the ongoing geopolitical events in Ukraine and...

Destructive malware targeting Ukrainian organizations

Microsoft Threat Intelligence Center MSTIC has identified evidence of a destructive malware operation targeting multiple organizations in Ukraine. This malware first appeared on victim systems in Ukraine on January 13, 2022. Microsoft is aware of the ongoing geopolitical events in Ukraine and...

Microsoft Warns of Destructive Malware Targeting Ukrainian Organizations

Microsoft has released a blog post on possible Master Boot Record MBR Wiper activity targeting Ukrainian organizations, including Ukrainian government agencies. According to Microsoft, powering down the victim device executes the malware, which overwrites the MBR with a ransom note; however, the...