ESET Research<p>After years of dominance in <a href="https://infosec.exchange/tags/ESET" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>ESET</span></a>’s top <a href="https://infosec.exchange/tags/infostealer" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>infostealer</span></a> statistics, the era of <a href="https://infosec.exchange/tags/AgentTesla" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>AgentTesla</span></a> has come to an end. It finished H1 2025 in fourth place, its numbers having decreased by 57%. The reason? It is no longer under active development. <br>The threat actors behind Agent Tesla have reportedly lost access to the servers with the malware’s source code. A successor appeared almost immediately – another <a href="https://infosec.exchange/tags/MaaS" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>MaaS</span></a> threat, known as <a href="https://infosec.exchange/tags/SnakeStealer" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>SnakeStealer</span></a> or <a href="https://infosec.exchange/tags/SnakeKeylogger" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>SnakeKeylogger</span></a>, has claimed the number one spot. <br>Recommended as a suitable replacement directly in Agent Tesla’s Telegram channel, SnakeStealer now takes up almost a fifth of all infostealer detections registered by ESET telemetry. Between H2 2024 and H1 2025, its detections more than doubled. <br>If you want to find out more information about this changing of the guard in the infostealer threat landscape, head on over to <a href="https://infosec.exchange/tags/ESETThreatReport" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>ESETThreatReport</span></a>: <a href="https://welivesecurity.com/en/eset-research/eset-threat-report-h1-2025" rel="nofollow noopener noreferrer" translate="no" target="_blank"><span class="invisible">https://</span><span class="ellipsis">welivesecurity.com/en/eset-res</span><span class="invisible">earch/eset-threat-report-h1-2025</span></a></p>