UAC-0099 Targets Ukrainian Government Personnel With ASHVEIN RAT Hiding Commands in HTML
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A Russia-aligned threat actor tracked as UAC-0099 has been linked to a previously undocumented .NET infostealer and remote access trojan (RAT) codenamed ASHVEIN, according to research from TrendAI. The malware has been used in attacks targeting Ukrainian government personnel. TrendAI is tracking this activity cluster under the name Earth Sirrush, which was formerly tracked as SHADOW-EARTH-065.
The reporting attributes the campaign to a Russia-aligned actor, consistent with UAC-0099's established focus on Ukrainian government targets. ASHVEIN combines infostealer and RAT capabilities within a .NET-based implant, and the malware has been observed hiding commands in HTML.
Details beyond these core facts—including specific indicators of compromise, affected software versions, and mitigation guidance—were not available in the source material.
Source: [email protected] (The Hacker News)
Has your organization encountered any UAC-0099 activity or similar .NET-based RATs targeting government personnel?
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