LONEPAGE
LONEPAGE is malware used by the threat actor UAC-0099 in cyber-espionage operations targeting Ukraine. Reported activity links it to attacks against Ukrainian state authorities, the Defense Forces, defense-industrial enterprises, and later the broader Ukrainian public sector. In December 2023, UAC-0099 exploited the WinRAR vulnerability CVE-2023-38831 to deliver LONEPAGE, and prior attacks were also observed using the same flaw to propagate it. Defenders also recorded LONEPAGE deployments during November-December 2024 in phishing campaigns against the Ukrainian public sector. Multiple reports state that LONEPAGE appears to have been replaced in more recent UAC-0099 operations by the C# loader MATCHBOIL. High-confidence details in the provided content about LONEPAGE itself are limited; the content does not directly describe its internal capabilities, persistence mechanisms, or specific indicators of compromise beyond its association with UAC-0099, its use in espionage-focused campaigns against Ukrainian targets, and delivery via exploitation of CVE-2023-38831 and phishing activity.
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Vulnerabilities exploited
1 CVE Mallory has correlated with this family across public research and vendor advisories. Each row links to the full Mallory page for that vulnerability.
Prior attacks have been observed leveraging security flaws in WinRAR software (CVE-2023-38831, CVSS score: 7.8) to propagate a malware called LONEPAGE.
Groups observed using it
1 distinct threat actor attributed by public researchers. Open in Mallory to see the full evidence chain and overlapping campaigns.
At the time, the group used a different malware strain known as Lonepage, which now appears to have been replaced by Matchboil in more recent operations.
Techniques & procedures
2 distinct techniques documented for this family, organized by ATT&CK tactic.
Initial Access
1 technique
Initial Access
Recent activity
5 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
Malware previously delivered by UAC-0099 (via WinRAR CVE-2023-38831); the report suggests MATCHBOIL may be used to replace it.
A malware family previously propagated via exploitation of a WinRAR flaw in attacks attributed to UAC-0099.
LONEPAGE is a malware previously used by UAC-0099 in phishing campaigns targeting the Ukrainian public sector, likely replaced by MATCHBOIL in recent attacks.
Malware propagated via exploitation of a WinRAR vulnerability in prior UAC-0099 activity.
The version that knows your environment.
Match every observed IP, domain, and hash against your live telemetry.
Named campaigns wielding this family, with evidence pinned to each claim.
CVEs this family uses for access and lateral movement.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Every documented technique, ranked by evidence weight.
Reddit, Mastodon, and CTI community discussion around this family.