Unidentified RAT pushes NetSupport RAT, (Mon, Jun 1st)
An unidentified Remote Access Trojan (RAT) infection observed in May 2026 was followed by deployment of a malicious NetSupport Manager RAT package. The initial RAT, whose name remains unknown, communicates with a command and control server over TCP port 443 using encoded traffic. The infection is linked to the SmartApeSG ClickFix campaign and involves multiple stages including scripts and a cabinet archive that installs and persists the NetSupport RAT on Windows hosts. Indicators such as domains and file hashes change frequently. No official patch or vendor advisory is available for this threat.
AI Analysis
Technical Summary
This threat involves a multi-stage RAT infection starting with an unidentified RAT that establishes encoded C2 communication on TCP port 443 to IP 89.110.110.119. This initial RAT downloads and executes scripts (processor.vbs, token.bat) and a cabinet archive (setup.cab) containing the NetSupport Manager RAT. The batch script installs and persists the NetSupport RAT on the infected Windows system and then deletes the initial infection files. The campaign is associated with the SmartApeSG ClickFix campaign, with changing indicators such as URLs and file hashes. The NetSupport RAT C2 server is located at IP 185.163.47.217 on port 443. The infection chain was observed starting in April 2026 and documented in late May 2026.
Potential Impact
The infection results in unauthorized remote access to compromised Windows hosts via the NetSupport Manager RAT, which can allow attackers to control the system, execute commands, and potentially move laterally or exfiltrate data. The initial RAT facilitates the delivery and installation of the NetSupport RAT. The dynamic nature of indicators complicates detection and response. No known exploits in the wild beyond this campaign are reported, and no CVE or patch information is available.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Since no official patch or vendor advisory is available, mitigation should focus on detecting and blocking the identified indicators of compromise such as the associated domains, IP addresses, and file hashes. Network monitoring for unusual encoded traffic on TCP port 443 to the specified IP addresses may help identify infections. Removal of the NetSupport RAT and associated files requires forensic analysis and manual cleanup. Stay updated with threat intelligence feeds like the @monitorsg Mastodon feed for evolving indicators.
Unidentified RAT pushes NetSupport RAT, (Mon, Jun 1st)
Description
An unidentified Remote Access Trojan (RAT) infection observed in May 2026 was followed by deployment of a malicious NetSupport Manager RAT package. The initial RAT, whose name remains unknown, communicates with a command and control server over TCP port 443 using encoded traffic. The infection is linked to the SmartApeSG ClickFix campaign and involves multiple stages including scripts and a cabinet archive that installs and persists the NetSupport RAT on Windows hosts. Indicators such as domains and file hashes change frequently. No official patch or vendor advisory is available for this threat.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This threat involves a multi-stage RAT infection starting with an unidentified RAT that establishes encoded C2 communication on TCP port 443 to IP 89.110.110.119. This initial RAT downloads and executes scripts (processor.vbs, token.bat) and a cabinet archive (setup.cab) containing the NetSupport Manager RAT. The batch script installs and persists the NetSupport RAT on the infected Windows system and then deletes the initial infection files. The campaign is associated with the SmartApeSG ClickFix campaign, with changing indicators such as URLs and file hashes. The NetSupport RAT C2 server is located at IP 185.163.47.217 on port 443. The infection chain was observed starting in April 2026 and documented in late May 2026.
Potential Impact
The infection results in unauthorized remote access to compromised Windows hosts via the NetSupport Manager RAT, which can allow attackers to control the system, execute commands, and potentially move laterally or exfiltrate data. The initial RAT facilitates the delivery and installation of the NetSupport RAT. The dynamic nature of indicators complicates detection and response. No known exploits in the wild beyond this campaign are reported, and no CVE or patch information is available.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Since no official patch or vendor advisory is available, mitigation should focus on detecting and blocking the identified indicators of compromise such as the associated domains, IP addresses, and file hashes. Network monitoring for unusual encoded traffic on TCP port 443 to the specified IP addresses may help identify infections. Removal of the NetSupport RAT and associated files requires forensic analysis and manual cleanup. Stay updated with threat intelligence feeds like the @monitorsg Mastodon feed for evolving indicators.
Technical Details
- Article Source
- {"url":"https://isc.sans.edu/diary/rss/33034","fetched":true,"fetchedAt":"2026-06-01T21:57:08.448Z","wordCount":506}
Threat ID: 6a1e003ce29bf47b504d3aea
Added to database: 6/1/2026, 9:57:16 PM
Last enriched: 6/1/2026, 9:57:24 PM
Last updated: 6/2/2026, 12:03:22 AM
Views: 4
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