Cyber Incident Victim: Sopra Steria Group
Date:
Oct 2020
Location:
France
Summary
A French IT services firm experienced a ransomware attack involving a previously unknown variant of Ryuk malware, leading to significant operational disruptions. The incident was detected after several days and confined to a limited portion of its infrastructure, with no evidence of data exfiltration or compromise of customer systems. The organization collaborated with authorities and antivirus providers to share the malware signature for broader protection. Recovery efforts involved a progressive reboot of systems under a remediation plan, though full restoration of normal operations was projected to require multiple weeks. This attack highlighted ransomware risks to IT service providers, following similar incidents affecting industry peers.
| CIA Posture | Motives | Tactics, Techniques & Procedures |
|---|---|---|
| Available to members | 1 motive | 1 technique |
| Threat Actor | Type | Location |
|---|---|---|
| 1 actor | Available to members | Available to members |
Description
Sopra Steria, a major French IT services provider, detected a ransomware attack on the evening of October 20, 2020. The company publicly disclosed the incident through a brief website message shortly after discovery, initiating an investigation that confirmed the attack involved a previously unidentified variant of the Ryuk ransomware. This new strain had not been documented by antivirus vendors or security agencies prior to the incident. Sopra Banking Software, a subsidiary, specified that the ransomware compromised a limited segment of the corporate IT infrastructure over several days before containment. The attack forced critical systems offline, disrupting normal operations across the organization.
Sopra Steria's response teams immediately shared technical details of the ransomware variant with relevant authorities and antivirus providers, enabling rapid development of detection signatures for broader industry protection. Forensic analysis found no evidence of data exfiltration or compromise of customer systems during the intrusion. The company implemented a phased recovery plan, beginning gradual restoration of affected systems on October 26 with stringent security protocols. Full operational normalization was projected to require multiple weeks due to the complexity of securely rebuilding infrastructure. Ryuk ransomware had previously targeted high-profile organizations across sectors, including defense and logistics firms, though Sopra Steria's incident marked its first known deployment against a major European IT services provider. The attack highlighted sector vulnerabilities, occurring months after Cognizant's $70 million ransomware loss from a separate threat group.