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In some cases, the actors also use TrickBot malware to carry out post-exploitation tasks.Īccording to a recently leaked threat actor “playbook,” Conti actors also exploit vulnerabilities in unpatched assets, such as the following, to escalate privileges and move laterally across a victim’s network: The actors use tools already available on the victim network-and, as needed, add additional tools, such as Windows Sysinternals and Mimikatz-to obtain users’ hashes and clear-text credentials, which enable the actors to escalate privileges within a domain and perform other post-exploitation and lateral movement tasks.
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Additionally, actors use Kerberos attacks to attempt to get the Admin hash to conduct brute force attacks.Ĭonti actors are known to exploit legitimate remote monitoring and management software and remote desktop software as backdoors to maintain persistence on victim networks. CISA and FBI have observed Conti actors using Router Scan, a penetration testing tool, to maliciously scan for and brute force routers, cameras, and network-attached storage devices with web interfaces. In the execution phase, actors run a getuid payload before using a more aggressive payload to reduce the risk of triggering antivirus engines. Common vulnerabilities in external assets.Other malware distribution networks (e.g., ZLoader) and.Fake software promoted via search engine optimization.Stolen or weak Remote Desktop Protocol (RDP) credentials.
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Malicious Word attachments often contain embedded scripts that can be used to download or drop other malware-such as TrickBot and IcedID, and/or Cobalt Strike-to assist with lateral movement and later stages of the attack life cycle with the eventual goal of deploying Conti ransomware.Spearphishing campaigns using tailored emails that contain malicious attachments or malicious links.It is likely that Conti developers pay the deployers of the ransomware a wage rather than a percentage of the proceeds used by affiliate cyber actors and receives a share of the proceeds from a successful attack.Ĭonti actors often gain initial access to networks through: While Conti is considered a ransomware-as-a-service (RaaS) model ransomware variant, there is variation in its structure that differentiates it from a typical affiliate model. See the ATT&CK for Enterprise for all referenced threat actor tactics and techniques. Note: This Alert uses the MITRE Adversarial Tactics, Techniques, and Common Knowledge (ATT&CK®) framework, version 9.
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To secure systems against Conti ransomware, CISA, FBI, and the National Security Agency (NSA) recommend implementing the mitigation measures described in this Advisory, which include requiring multifactor authentication (MFA), implementing network segmentation, and keeping operating systems and software up to date.Ĭlick here for a PDF version of this report.Ĭlick here for indicators of compromise (IOCs) in STIX format. (See FBI Flash: Conti Ransomware Attacks Impact Healthcare and First Responder Networks.) In typical Conti ransomware attacks, malicious cyber actors steal files, encrypt servers and workstations, and demand a ransom payment. The Cybersecurity and Infrastructure Security Agency (CISA) and the Federal Bureau of Investigation (FBI) have observed the increased use of Conti ransomware in more than 400 attacks on U.S. homeland at this time, CISA, FBI, and NSA encourage organizations to review this advisory and apply the recommended mitigations.
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While there are no specific or credible cyber threats to the U.S. Notable attack vectors include Trickbot and Cobalt Strike (see below for details). and international organizations have risen to more than 1,000. March 9, 2022: this joint CSA was updated to include indicators of compromise (see below) and the United States Secret Service as a co-author.Ĭonti cyber threat actors remain active and reported Conti ransomware attacks against U.S.
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Update your operating system and software.Segment and segregate networks and functions.Immediate Actions You Can Take Now to Protect Against Conti Ransomware