Security researchers have identified two new Android malware families, SeedSnatcher and FvncBot, which are actively targeting users in the cryptocurrency and mobile banking sectors. SeedSnatcher employs overlay phishing techniques and BIP 39 validation to steal seed phrases from crypto wallet users, posing a significant threat to the security of digital assets. FvncBot, on the other hand, masquerades as a legitimate security app and targets banking users in Poland, leveraging advanced features such as keylogging, web-inject attacks, and hidden virtual network computing (HVNC) to facilitate financial fraud.
Both malware families exploit Android's accessibility services to gain elevated privileges and evade detection, with FvncBot using a loader app to bypass restrictions on newer Android versions. The campaigns are notable for their use of sophisticated evasion techniques, including crypting services and session-based deployment, and highlight the evolving threat landscape facing both cryptocurrency and banking users on mobile platforms. Security experts recommend heightened vigilance and the use of robust security solutions to mitigate these risks.

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A follow-up report highlighted FvncBot as a newly identified Android banking trojan aimed at mBank customers. It emphasized the malware's hidden VNC functionality and H.264-based screen streaming capabilities for remote fraud operations.
A broader research disclosure detailed two Android malware families, FvncBot and SeedSnatcher, alongside an upgraded ClayRat variant. The report said FvncBot targets Polish mBank users with accessibility abuse, keylogging, and screen streaming, while SeedSnatcher steals seed phrases and 2FA codes and ClayRat gained stronger device takeover and concealment features.
Researchers identified the SeedSnatcher Android malware family in the wild targeting cryptocurrency users through overlay-based phishing to steal wallet seed phrases. The malware also validates captured phrases against the BIP-39 standard before using or exfiltrating them, and has been distributed via channels such as Telegram.
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