PT Sandbox

LunaSpy Android Spyware Masquerades as FSB Antivirus and Bundles Right Dialer

Positive Technologies researchers discovered a malicious APK named Антивирус ФСБ.apk that installs the legitimate Right Dialer application from developer Goodwy while embedding the LunaSpy spyware. The sample uses package name com.syscore.toolsuite and requests extensive permissions including Accessibility Service to enable broad device control. Dynamic analysis in PT Sandbox revealed command-and-control communication, privilege escalation, and creation of hidden files. Static analysis showed XOR-encrypted strings and an expanded command set that includes call recording via CallService, call redirection rules in JSON format, screen tree extraction, gesture simulation, and anti-analysis commands such as RESET_REBOOT and DISABLE_PLAY_PROTECT. The malware can exfiltrate call recordings in WAV format, perform taps and swipes, and revive camera and microphone permissions through overlay notifications. Researchers published file and network indicators of compromise including multiple IP addresses used by the operators.

Corporate Nextcloud Security Gaps: Default Settings, Antivirus Failures and Open Source Integration Challenges

A detailed analysis from K2Tech reveals that corporate Nextcloud deployments require extensive security hardening beyond default open source configurations. The article examines integration with LDAP, WAF, Anti-DDoS and multiple antivirus engines including ClamAV, Kaspersky Scan Engine and PT Sandbox over ICAP. Critical issues include antivirus plugins bypassing scans during unreachable states or chunked file uploads via MOVE commands, allowing infected files to reach S3 storage. Performance tests on identical 4 vCPU and 16 GB RAM hardware showed Kaspersky Scan Engine delivering the highest throughput while PT Sandbox imposed heavy CPU loads. The piece also covers architecture spanning MariaDB Galera, Redis, Elasticsearch and multi-AZ S3, plus the need for custom parameter tuning and continuous testing due to frequent Nextcloud releases. Overall, the report emphasizes that true corporate-grade security for open source file sharing demands significant post-installation effort and monitoring.