A CWE-269: Improper Privilege Management vulnerability exists that could cause a denial of service of the Ethernet communication of the controller when sending a specific request over SNMP. Affected products: Modicon M340 CPUs(BMXP34* versions prior to V3.40), Modicon M340 X80 Ethernet Communication modules:BMXNOE0100 (H), BMXNOE0110 (H), BMXNOR0200H RTU(BMXNOE* all versions)(BMXNOR* versions prior to v1.7 IR24)
FortiGuard Labs is aware of that the Federal Bureau of Investigation (FBI), the Cybersecurity and Infrastructure Security Agency (CISA), and the Department of Health and Human Services (HHS) released a joint advisory for Hive ransomware as part of their #StopRansomware effort. Hive ransomware is a Ransomware-as-a-Service (RaaS) consisting of developers and affiliates. It attempts to steal data, encrypt files on victims’ machines, and demand ransom recover affected files and prevent stolen data from being published to their data leak site, called “HiveLeaks,” on the DarkWeb.Why is this Significant?This is significant because Hive is a Ransomware-as-a-Service (RaaS) that, according to the advisory, has victimized more than 1,300 enterprises globally and extorted 100 million US dollars. The group has been active since June 2021 and did not only target private enterprises but also essential industries such as government organizations and healthcare services. What is Hive Ransomware?Hive is a Ransomware-as-a-Service (RaaS) consisting of two groups: developers and affiliates. Hive developers create, maintain, and update Hive ransomware and infrastructures such date leak site named “HiveLeaks” and negotiant site. Hive affiliates are responsible for finding and infecting victims, exfiltrating files, and deploying Hive ransomware to the victims’ network.The latest Hive ransomware iterations are written in the Rust programing language. Older variants are written in Go.Reported initial infection vectors include emails, exploiting vulnerabilities such as CVE-2020-12812, CVE-2021-31207, CVE-2021-34473 and CVE-2021-34523.Hive ransomware encrypts files on victims’ machines and typically appends a “.hive” file extension to the affected files. It also drops a ransom note named “HOW_TO_DECRYPT.txt”, which instructs victims to visit a negotiation site on TOR.The advisory states that Hive ransomware is known to victimize organizations that were previously infected with Hive ransomware and recovered without paying ransom.What is the Status of Protection?FortiGuard Labs provides the following AV signatures for recent Hive ransomware samples that we collected:W32/Filecoder_Hive.A!tr.ransomW32/Filecoder_Hive.B!tr.ransomW32/Hive.4a4e!tr.ransomW32/Hive.B0FF!tr.ransomW32/Hive.d10e!tr.ransomW32/Hive.FD38!tr.ransomW64/Filecoder.AW!tr.ransomW64/Filecoder_Hive.A!tr.ransomW64/Filecoder_Hive.B!tr.ransomW64/Hive.31ec!tr.ransomW64/Hive.6bcb!tr.ransomW64/Hive.71de!tr.ransomW64/Hive.7cec!tr.ransomW64/Hive.933c!tr.ransomW64/Hive.A!trW64/Hive.B0FF!tr.ransomW64/Hive.c2e4!tr.ransomW64/Hive.e550!tr.ransomW64/Hive.ea51!tr.ransomW32/Filecoder.507F!tr.ransomW32/Agent.0b0f!tr.ransomW32/Agent.32a5!tr.ransomW32/Agent.65e3!tr.ransomW32/Agent.69ce!tr.ransomW32/Agent.6d49!tr.ransomW32/Agent.7c49!tr.ransomW64/Agent.U!trAll network IOCs on the advisory are blocked by Webfiltering.FortiGuard Labs provides the following IPS signatures for the vulnerabilities reportedly exploited as initial infection vector by Hive threat actors:MS.Exchange.MailboxExportRequest.Arbitrary.File.Write (CVE-2021-31207)MS.Exchange.Server.Autodiscover.Remote.Code.Execution (CVE-2021-34473)MS.Exchange.Server.Common.Access.Token.Privilege.Elevation (CVE-2021-34523)
FortiGuard Labs is aware of a joint advisory (AA22-320A) issued by Cybersecurity and Infrastructure security Agency (CISA) and the Federal Bureau of Investigation (FBI) on November 16, 2022. The advisory is related to an Iranian government-sponsored campaign where threat actors breached an unnamed U.S. federal agency and deployed a crypto miner and a hacktool to the compromised network.Why is this Significant?This is significant because threat actors backed by the Iranian government compromised a U.S. federal agency and deployed XMRig (crypto miner) and Mimikatz (a post-exploit tool used for credential harvesting).In February 2022, Iranian threat actors reportedly compromised a federal government agency by exploiting CVE-2021-44228, also known as Log4Shell, in an unpatched VMware Horizon server. This signifies the importance of timely patching of vulnerable systems.How did the Attack Occur?The initial infection vector was exploitation of CVE-2021-44228 (Log4Shell) in a vulnerable VMware Horizon server. Once the attacker got a foot in the door to the victim’s network, the attacker downloaded and installed XMRig (mining software for Monero cyrptocurrency) after excluding the victim’s C: drive from scanning by Windows Defender. The attacker leveraged RDP to move laterally to other systems on the victim’s network, deployed PsExec (a free Microsoft tool execute processes on other systems) and Mimikatz (an open-source tool for credential harvesting) and implanted Ngrok (a dual use tunneling tool). Also, the attacker accessed the domain controller and retrieved a list of machines that belong to the domain furthering compromise.What is CVE-2021-44228 (Log4Shell)?CVE-2021-44228 is a remote code execution vulnerability in the popular Java-based logging utility Log4j2. The vulnerability was disclosed to the public by Apache in early December, however Proof-of-Concept (PoC) code for CVE-2021-44228 was believed to be available earlier.FortiGuard Labs previously released Outbreak Alert and Threat Signal for CVE-2022-44228. See the Appendix for a link to “Outbreak Alert: Apache Log4j2 Vulnerability” and “Apache Log4J Remote Code Execution Vulnerability (CVE-2021-44228)”.What is the Status of Coverage? FortiGuard Labs detects the malicious files in the advisory that are available with the following AV signatures:Riskware/CoinMinerPossibleThreatAll reported network IOCs in the advisory are blocked by Webfiltering.FortiGuard Labs has IPS coverage in place for CVE-2021-44228 (Log4Shell):Apache.Log4j.Error.Log.Remote.Code.Execution
FortiGuard Labs is aware of a report that APT group “Billbug” compromised a certificate authority (CA) as well as multiple government and defense organizations in Asia. Also known as Lotus Blossom and Thrip, the APT group reportedly has been active since 2009 and uses custom backdoor malware “Hannotog” and “Sagerunex” as well as available tools in compromised machines.Why is this Significant?This is significant because Billbug APT threat actor group targeted a certificate authority (CA). Should digital certificates be compromised, the attacker could use them to sign malware for detection evasion by security solutions and eavesdrop on HTTPS communications.Also, the reports indicate that multiple organizations in government and defense sectors in Asia were compromised by Billbug APT. What is Billbug APT?Billbug, Lotus Blossom and Thrip, is a threat actor that has been reportedly active since at last 2009 and has interests in U.S. organizations as well as government, defense, and communications organizations in Southeast Asia. Their primary motive is thought to be information espionage.Billbug APT employs living-off-the-land techniques and uses custom malware. The tools that were reportedly used by Billbug APT are the following:Hannotog backdoorSagerunex backdoorAdFindCertutilLogMeInMimikatzNBTscanPingPort ScannerPowerShellPsExecRouteTracertWinmailWinRARWinSCPWhat is the Status of Coverage?FortiGuard Labs detects the files in the report with the following AV signatures:W32/Agent.QTP!trW32/Elsentric.J!trW32/Generic.A!trW32/PossibleThreatW64/Agentb.F!trW64/Agent.LF!trW64/Elsentric.E!trW64/Elsentric.G!trMalicious_Behavior.SBPossibleThreat.PALLAS.HRiskware/Kryptik
This vulnerability allows remote attackers to execute arbitrary code on affected installations of Microsoft Teams. No user interaction is required if the attacker and target are in the same Teams organization.
This vulnerability allows remote attackers to execute arbitrary code on affected installations of Microsoft Exchange. Authentication is required to exploit this vulnerability.
This vulnerability allows remote attackers to disclose sensitive information on affected installations of Microsoft Exchange. Authentication is required to exploit this vulnerability.
This vulnerability allows remote attackers to create a denial-of-service condition on affected installations of Microsoft Exchange. Authentication is required to exploit this vulnerability.
This vulnerability allows remote attackers to create a denial-of-service condition on affected installations of Microsoft Exchange. Authentication is required to exploit this vulnerability.
This vulnerability allows remote attackers to disclose sensitive information on affected installations of Microsoft Exchange. Authentication is required to exploit this vulnerability.
