Sophos MDR not too long ago responded to a focused assault involving a Managed Service Supplier (MSP). On this incident, a menace actor gained entry to the MSP’s distant monitoring and administration (RMM) instrument, SimpleHelp, after which used it to deploy DragonForce ransomware throughout a number of endpoints. The attackers additionally exfiltrated delicate knowledge, leveraging a double extortion tactic to stress victims into paying the ransom.
Sophos MDR has medium confidence the menace actor exploited a series of vulnerabilities that had been launched in January 2025:
- CVE-2024-57727: A number of path traversal vulnerabilities
- CVE-2024-57728: Arbitrary file add vulnerability
- CVE-2024-57726: Privilege escalation vulnerability
DragonForce
DragonForce ransomware is a complicated and aggressive ransomware-as-a-service (RaaS) model that first emerged in mid-2023. As mentioned in latest analysis from Sophos Counter Risk Unit (CTU), DragonForce started efforts in March to rebrand itself as a “cartel” and shift to a distributed affiliate branding mannequin.
Coinciding with this effort to enchantment to a wider vary of associates, DragonForce not too long ago garnered consideration within the menace panorama for claiming to “take over” the infrastructure of RansomHub. Stories additionally counsel that well-known ransomware associates, together with Scattered Spider (UNC3944) who was previously a RansomHub affiliate, have been utilizing DragonForce in assaults focusing on a number of giant retail chains within the UK and the US.
The incident
Sophos MDR was alerted to the incident by detection of a suspicious set up of a SimpleHelp installer file. The installer was pushed through a reputable SimpleHelp RMM occasion, hosted and operated by the MSP for his or her purchasers. The attacker additionally used their entry by the MSP’s RMM occasion to collect data on a number of buyer estates managed by the MSP, together with amassing machine names and configuration, customers, and community connections.
One consumer of the MSP was enrolled with Sophos MDR and had Sophos XDR endpoint safety deployed. By way of a mixture of behavioral and malware detection and blocking by Sophos endpoint safety and MDR actions to close down attacker entry to the community, thwarting the ransomware and double extortion try on that buyer’s community. Nonetheless, the MSP and purchasers that weren’t utilizing Sophos MDR had been impacted by each the ransomware and knowledge exfiltration. The MSP engaged Sophos Fast Response to supply digital forensics and incident response on their atmosphere.
Indicators of compromise associated to this investigation will likely be accessible from our GitHub.
