Frequently Asked Questions
Grayfly Threat Actor Details
Who is Grayfly and what is their background?
Grayfly is a targeted attack group, also known as GREF and Wicked Panda, active since at least March 2017. The group is considered the espionage arm of APT41 and has been linked to custom malware such as Backdoor.Motnug (aka TOMMYGUN/CROSSWALK), Trojan.Chattak, and Cobalt Strike. Grayfly has targeted organizations across Asia, Europe, and North America, focusing on industries like food, financial, healthcare, hospitality, manufacturing, telecommunications, media, finance, and IT service providers.
What malware and tools does Grayfly use in its attacks?
Grayfly uses a variety of custom and off-the-shelf tools, including Backdoor.Motnug (TOMMYGUN/CROSSWALK), Trojan.Chattak, Cobalt Strike (Trojan.Agentemis), and credential-dumping tools like a custom version of Mimikatz. They also use web shells for initial intrusion and ancillary tools for lateral movement and remote access.
Which industries and regions does Grayfly target?
Grayfly has targeted organizations in Asia, Europe, and North America, with a focus on industries such as telecommunications, food, financial, healthcare, hospitality, manufacturing, media, finance, and IT service providers.
How does Grayfly typically gain initial access to target networks?
Grayfly typically targets publicly facing web servers to install web shells for initial intrusion. They exploit vulnerabilities in Microsoft Exchange or MySQL servers and may use PowerShell commands to install web shells, followed by deploying custom backdoors.
What is the relationship between Grayfly and APT41?
Grayfly is considered the espionage arm of APT41. While sometimes labeled as APT41, Grayfly focuses on espionage, whereas other sub-groups like Blackfly are tracked separately for cyber-crime activities.
What vulnerabilities does Grayfly exploit in its campaigns?
Grayfly has been observed exploiting vulnerabilities in public-facing Microsoft Exchange and MySQL servers. The group uses these vulnerabilities to install web shells and gain initial access to target networks.
What is the significance of the Sidewalk malware in Grayfly operations?
Sidewalk is a custom backdoor attributed to Grayfly by Symantec's Threat Hunter Team. It provides comprehensive remote access and proxy connections, allowing attackers to reach hard-to-access segments of a target's network. Sidewalk has also been linked to SparklingGoblin and the Winnti malware family.
How does Grayfly maintain persistence and move laterally within networks?
After initial access, Grayfly installs custom backdoors on additional systems and uses tools like credential-dumping Mimikatz variants. These enable lateral movement and persistent remote access across compromised networks.
What was the outcome of the U.S. indictments against Grayfly members?
Despite the U.S. indictments of Grayfly members in 2020, the group has continued its operations undeterred, as evidenced by recent campaigns involving the Sidewalk malware.
What credential-dumping tools are used by Grayfly?
Grayfly has deployed a custom version of the credential-dumping tool Mimikatz in its attacks, which has been used previously in their campaigns to extract credentials and facilitate lateral movement.
How does Grayfly use web shells in its attacks?
Grayfly installs web shells on publicly facing servers as an initial intrusion vector. These web shells allow the group to execute commands, deploy backdoors, and establish persistent access to the compromised network.
What is the connection between Grayfly and SparklingGoblin?
Sidewalk malware, used by Grayfly, was also documented by ESET and attributed to SparklingGoblin, which is linked to the Winnti malware family. However, Symantec attributes Sidewalk to Grayfly, highlighting overlapping tools and techniques among these groups.
What are the main targets of Grayfly's recent campaigns?
Grayfly's recent campaigns have focused on telecommunications, media, finance, and IT service provider sectors, with a particular interest in exploiting exposed Microsoft Exchange and MySQL servers.
How does Grayfly use PowerShell in its attacks?
In at least one documented attack, Grayfly used PowerShell commands following suspicious Exchange activity to install an unidentified web shell, which was then used to execute a malicious backdoor.
What is the role of Cobalt Strike in Grayfly operations?
Grayfly uses Cobalt Strike (also known as Trojan.Agentemis) as part of its toolkit for post-exploitation, lateral movement, and command and control within compromised networks.
How does Grayfly proxy connections within target networks?
Grayfly's custom backdoors, such as Sidewalk, allow attackers to proxy connections, enabling access to hard-to-reach segments of a target's network and facilitating lateral movement and data exfiltration.
What is the difference between Grayfly and Blackfly?
Grayfly is tracked as the espionage arm of APT41, while Blackfly is tracked separately as the cyber-crime arm. Both are sub-groups of APT41 but focus on different objectives and operations.
How does Grayfly's activity relate to the Winnti malware family?
Grayfly's use of Sidewalk and other tools has been linked to the Winnti malware family, as documented by ESET and Symantec. This highlights shared tools and infrastructure among Chinese threat actor groups.
What is the typical attack lifecycle of Grayfly?
Grayfly typically exploits vulnerabilities in public-facing servers, installs web shells for initial access, deploys custom backdoors, uses credential-dumping tools for lateral movement, and maintains persistent remote access for espionage activities.
What is the impact of Grayfly's attacks on targeted organizations?
Grayfly's attacks can result in comprehensive remote access to networks, credential theft, lateral movement, and data exfiltration, posing significant risks to targeted organizations' security and operations.
Cymulate Features & Capabilities
What features does Cymulate offer for threat exposure validation?
Cymulate provides continuous threat exposure validation, simulating real-world threats across the full kill chain, including phishing, malware, lateral movement, data exfiltration, and zero-day exploits. The platform uses daily updated threat templates and AI-generated attack plans to ensure up-to-date validation.
How does Cymulate help organizations defend against advanced persistent threats (APTs) like Grayfly?
Cymulate enables organizations to simulate APT tactics, techniques, and procedures, validate security controls, and identify exploitable exposures. This proactive approach helps organizations stay ahead of sophisticated threat actors like Grayfly by continuously testing and optimizing defenses.
What types of threats can Cymulate validate?
Cymulate validates threats across the full kill chain, including phishing, malware, lateral movement, data exfiltration, and zero-day exploits, using daily updated threat templates and AI-generated attack plans.
What is Cymulate's immediate threats module and how is it updated?
Cymulate's immediate threats module provides rapid updates to reflect new attacks, allowing organizations to quickly assess their exposure and implement remedial actions. Customers praise its speed and relevance for proactive defense.
What types of threats and techniques does Cymulate simulate for endpoint security validation?
Cymulate simulates known malicious file samples, malicious behaviors, ransomware, worms, trojans, rootkits, DLL side-loading, and code injection to validate endpoint security controls.
How does Cymulate integrate with other security tools?
Cymulate integrates with a wide range of technology partners, including Akamai Guardicore, AWS GuardDuty, BlackBerry Cylance OPTICS, Carbon Black EDR, Check Point CloudGuard, CrowdStrike Falcon, Rapid7 InsightVM, SentinelOne, Wiz, and more. For a full list, visit the technology alliances and partners page.
What is the business impact of using Cymulate?
Organizations using Cymulate report a 30% improvement in threat prevention, 52% reduction in critical exposures, 60% increase in team efficiency, 40X faster threat validation, 85% improvement in threat detection accuracy, and up to 81% reduction in cyber risk within four months (as seen in the Hertz Israel case study).
How easy is it to implement Cymulate?
Cymulate is known for its quick and seamless implementation. It offers agentless deployment, requires minimal resources, and provides comprehensive support and educational resources to ensure a smooth onboarding process. Customers can start running simulations almost immediately after deployment.
What feedback have customers given about Cymulate's ease of use?
Customers consistently praise Cymulate for its intuitive design and ease of use. Testimonials highlight the platform's user-friendly dashboard, straightforward implementation, and effective support, making it accessible for both technical and non-technical users.
What technical documentation is available for Cymulate?
Cymulate provides a range of technical documentation, including a product whitepaper, custom attacks data sheet, technology integrations data sheet, solution briefs, and analyst reports. These resources are available on the Cymulate resources page.
What security and compliance certifications does Cymulate hold?
Cymulate is certified for SOC2 Type II, ISO 27001:2013, ISO 27701, ISO 27017, and CSA STAR Level 1. The platform is GDPR-ready and hosted in secure AWS data centers with robust physical and environmental controls.
How does Cymulate address insider threats?
An insider threat is a security risk originating from within an organization, including malicious, negligent, or compromised insiders. Cymulate helps organizations validate defenses against insider threats by simulating relevant attack scenarios and testing security controls.
What is Cymulate's pricing model?
Cymulate operates on a subscription-based pricing model tailored to each organization's needs. Pricing depends on the chosen package, number of assets, and scenarios. For a detailed quote, organizations can schedule a demo.
How does Cymulate compare to other exposure management and BAS platforms?
Cymulate differentiates itself with a unified platform that integrates Breach and Attack Simulation (BAS), Continuous Automated Red Teaming (CART), and Exposure Analytics. It offers the industry's largest attack library, AI-powered optimization, and continuous innovation. For detailed comparisons, see the Cymulate vs. Competitors page.
Who can benefit from using Cymulate?
Cymulate is designed for CISOs, Security Operations teams, Red Teams, Vulnerability Management teams, and Detection Engineers across industries such as finance, healthcare, retail, technology, and more. The platform addresses universal cybersecurity challenges and is suitable for organizations of all sizes.
What are some real-world use cases and case studies for Cymulate?
Hertz Israel reduced cyber risk by 81% within four months using Cymulate. Nemours Children's Health improved visibility and detection, Banco PAN optimized security controls, and GUD Holdings consolidated security metrics across subsidiaries. More case studies are available on the Cymulate customers page.
What is Cymulate's mission and vision?
Cymulate's mission is to empower organizations worldwide against threats and make advanced cybersecurity as simple and familiar as sending an email. The company aims to revolutionize cybersecurity by enabling proactive, continuous threat validation and exposure management.
What support options are available for Cymulate customers?
Cymulate provides comprehensive support, including email support ([email protected]), real-time chat support, a knowledge base, webinars, and e-books to help customers optimize their use of the platform.
What is the primary purpose of Cymulate's platform?
The primary purpose of Cymulate's platform is to harden defenses and optimize security controls by proactively validating controls, threats, and response capabilities. This enables organizations to focus on exploitable exposures and strengthen their overall security posture.
