Unidentified RAT pushes NetSupport RAT, (Mon, Jun 1st)

Introduction This diary provides indicators from an unidentified RAT infection on Wednesday 2026-05-27 that was followed by a malicious NetSupport Manager RAT package. This originated from the SmartApeSG ClickFix campaign. I still don't know the name of the initial RAT, but it has consistently been generating encoded (not HTTPS/SSL/TLS) traffic to a command and control (C2) server at 89.110.110[.]119 over TCP port 443 since I first noticed it sometime in April 2026. Images from the infection Shown above: Fake verification page with ClickFix instructions from the SmartApeSG campaign. Shown above: Initial RAT malware on an infected Windows host. Shown above: Follow-up files for NetSupport RAT sent through the initial RAT C2 traffic. Shown above: NetSupport RAT C2 traffic. Indicators of Compromise Example of SmartApeSG URLs seen on Wednesday 2026-05-27: hxxps[:]//hiddenplanetlab[.]top/signin/secure-util.js hxxps[:]//hiddenplanetlab[.]top/signin/private-template?c66kjD5i hxxps[:]//hiddenplanetlab[.]top/signin/legacy-worker.js?18b3825af007e53d Example of traffic generated by running the associated ClickFix script: hxxp[:]//178.156.165[.]82/ hxxp[:]//178.156.173[.]194/ hxxps[:]//silverharvestnetwork[.]com/check Initial RAT C2 traffic: tcp[:]//89.110.110[.]119:443/ IP address for NetSupport RAT C2 server: hxxp[:]//185.163.47[.]217:443 Files from the infection: SHA256 hash: 1514b1268e9dc6d2f37137aa38c756cb4bf8186ac9235d6863b78e7f8bbbe976 File size: 26,555,757 bytes File type: Zip archive data, at least v2.0 to extract File location: hxxps[:]//silverharvestnetwork[.]com/check File description: Zip archive containing software package for the initial RAT. SHA256 hash: 469bac8e10f50263e8ff0806e6ba126bb4cc660799129a8653eab3f8ec7201e5 File size: 109 bytes File type: ASCII text File location: C:\ProgramData\processor.vbs File description: Initial script that runs token.bat SHA256 hash: 9c7eda2c4d3aaa8746495741bef57a07de180f0409409faf0f91658e88ba33f5 File size: 8,262 bytes File type: DOS batch file text, ASCII text, with very long lines File location: C:\ProgramData\token.bat File description: Batch scrip that extracts, runs, and makes persistent NetSupport RAT from setub.cab SHA256 hash: 7ba5481c873bb3081442561f749f590badd72ef249fddfe993e30b28dc0c2112 File size: 17,275,805 bytes File type: Microsoft Cabinet archive data File location: C:\ProgramData\setup.cab File description: CAB file containing malicious NetSupport RAT package Contents of this CAB file extracted to: C:\ProgramData\UpdateInstaller\ Note 1: The files processor.vbs , token.bat , and setup.cab are all deleted by the token.bat script after it installs the malicious NetSupport RAT package and makes it persistent on the infected Windows host. Note 2: The indicators for this activity (domains, file hashes, etc.) change on a daily basis. For more up-to-date indicators on SmartApeSG and similar campaigns, see the @monitorsg feed on Mastodon. --- Bradley Duncan brad [at] malware-traffic-analysis.net (c) SANS Internet Storm Center. https://isc.sans.edu Creative Commons Attribution-Noncommercial 3.0 United States License.