UAC-0247 expands cyber campaign across Ukraine


From clinics to government: UAC-0247 expands cyber campaign across Ukraine

Pierluigi Paganini
April 16, 2026

CERT-UA reports UAC-0247 targeting Ukrainian clinics and government bodies with malware stealing data from Chromium browsers and WhatsApp.

CERT-UA has revealed a cyber campaign by the threat actor UAC-0247 targeting Ukrainian government entities and municipal healthcare facilities, including clinics and emergency hospitals. The operation between March and April 2026, used malware designed to steal sensitive data from Chromium-based browsers and WhatsApp. The origin of the threat actor remains unclear, raising concerns about ongoing espionage risks.

The attack begins with a phishing email posing as a humanitarian aid proposal, prompting the victim to click a link. To appear credible, attackers may use AI-generated fake websites or exploit legitimate sites vulnerable to XSS attacks.

Clicking the link downloads an archive containing a shortcut file that triggers an HTA execution chain. This retrieves a remote HTA file showing a decoy form while silently launching an EXE via a scheduled task.

The malware injects shellcode into legitimate processes like RuntimeBroker.exe. Recent variants use a two-stage loader with a custom executable format, delivering a compressed and encrypted payload. A reverse shell, often similar to RAVENSHELL, establishes a TCP connection with the command server, encrypts traffic via XOR, and executes commands.

“A typical TCP reverse shell or an analogue classified as RAVENSHELL can be used as stagers, which provides for establishing a TCP connection with the management server, encrypting traffic using 9-byte XOR (key: “01 01 02 03 74 15 04 FF EE”; during the first connection, an XOR-encrypted message “Connected!” is transmitted), as well as executing commands using CMD.” reads the report published by CERT-UA.

For persistence, the attackers deployed the malware AGINGFLY alongside a PowerShell script, SILENTLOOP, which manages commands, updates configuration, and retrieves C2 server data via Telegram with backup mechanisms.

AGINGFLY is a C# malware used to remotely control infected computers. It can run commands, download files, take screenshots, log keystrokes, and execute code. It communicates with its control server via encrypted web sockets using AES-CBC. Unlike typical malware, it doesn’t store command functions locally, instead, it downloads them from the server and compiles them on the fly, making it more flexible and harder to detect.

CERT-UA experts analyzed multiple incidents, discovering that attackers stole credentials from browsers using CHROMELEVATOR and from WhatsApp via ZAPIXDESK, while also conducting reconnaissance and lateral movement within networks. They employ subnet scanners and tools like RUSTSCAN, and create covert tunnels using LIGOLO-NG and CHISEL. In one case, an XMRIG miner was deployed via a modified WIREGUARD executable. Targets include Ukrainian Defense personnel, with malware spread through a fake “BACHU” tool shared on Signal, leveraging DLL side-loading to deploy AGINGFLY.

“To reduce the likelihood of a cyberthreat, it is enough to limit the launch of LNK, HTA, and JS files, as well as legitimate utilities mshta.exe, powershell.exe, and wscript.exe, the necessity of which has been repeatedly emphasized in the context of reducing the attack surface by using standard operating system protection mechanisms.” concludes the report.

Follow me on Twitter: @securityaffairs and Facebook and Mastodon

Pierluigi Paganini

(SecurityAffairs – hacking, CERT-UA)







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Do you ever walk past a person on the streets exhibiting mental health issues and wonder what happened to their family? I have a brother—or at least, I used to. I worry about where he is and hope he is safe. He hasn’t taken my call since 2014.

James and his brother as young children playing together before his brother became sick. James is on the right and his brother is on the left.

James and his brother as young children playing together before his brother became sick. James is on the right and his brother is on the left.

When I was 13, I had a very bad day. I was in the back of the car, and what I remember most was the world-crushing sound violently panging off every surface: he was pounding his fists into the steering wheel, and I worried it would break apart. He was screaming at me and my mother, and I remember the web of saliva and tears hanging over his mouth. His eyes were red, and I knew this day would change everything between us. My brother was sick.

Nearly 20 years later, I still have trouble thinking about him. By the time we realized he was mentally ill, he was no longer a minor. The police brought him to a facility for the standard 72-hour hold, where he was diagnosed with paranoid delusional schizophrenia. Concluding he was not a danger to himself or others, they released him.

There was only one problem: at 18, my brother told the facility he was not related to us and that we were imposters. When they let him out, he refused to come home.

My parents sought help and even arranged for medication, but he didn’t take it. Before long, he disappeared.

My brother’s decline and disappearance had nothing to do with the common narratives about drug use or criminal behavior. He was sick. By the time my family discovered his condition, he was already 18 and legally independent from our custody.

The last time he let me visit, I asked about his bed. I remember seeing his dirty mattress on the floor beside broken glass and garbage. I also asked about the laptop my parents had gifted him just a year earlier. He needed the money, he said—and he had maxed out my parents’ credit card.

In secret from my parents, I gave him all the cash I had saved. I just wanted him to be alright.

My parents and I tried texting and calling him; there was no response except the occasional text every few weeks. But weeks turned into months.

Before long, I was graduating from high school. I begged him to come. When I looked in the bleachers, he was nowhere to be seen. I couldn’t help but wonder what I had done wrong.

The last time I heard from him was over the phone in 2014. I tried to tell him about our parents and how much we all missed him. I asked him to be my brother again, but he cut me off, saying he was never my brother. After a pause, he admitted we could be friends. Making the toughest call of my life, I told him he was my brother—and if he ever remembers that, I’ll be there, ready for him to come back.

I’m now 32 years old. I often wonder how different our lives would have been if he had been diagnosed as a minor and received appropriate care. The laws in place do not help families in my situation.

My brother has no social media, and we suspect he traded his phone several years ago. My family has hired private investigators over the years, who have also worked with local police to try to track him down.

One private investigator’s report indicated an artist befriended my brother many years ago. When my mother tried contacting the artist, they said whatever happened between them was best left in the past and declined to respond. My mom had wanted to wish my brother a happy 30th birthday.

My brother grew up in a safe, middle-class home with two parents. He had no history of drug use or criminal record. He loved collecting vintage basketball cards, eating mint chocolate chip ice cream, and listening to Motown music. To my parents, there was no smoking gun indicating he needed help before it was too late.

The next time you think about a person screaming outside on the street, picture their families. We need policies and services that allow families to locate and support their loved ones living with mental illness, and stronger protections to ensure that individuals leaving facilities can transition into stable care. Current laws, including age-based consent rules, the limits of 72-hour holds, and the lack of step-down or supported housing options, leave too many families without resources when a serious diagnosis occurs.

Governments and lawmakers need to do better for people like my brother. As someone who thinks about him every day, I can tell you the burden is too heavy to carry alone.

James Finney-Conlon is a concerned brother and mental health advocate. He can be reached at [email protected].



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