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CVE-2022-26923 - Active Directory Domain Services Elevation of Privilege Vulnerability
THE THREAT Microsoft has disclosed a new vulnerability impacting Active Directory Certificate Services (ADCS) tracked as CVE-2022-26923 (Active Directory Domain Services Elevation of Privilege Vulnerability). If exploited successfully, an authenticated attacker can escalate privileges in environments where ADCS is running on the domain. eSentire is aware of technical details and tooling [2] for…
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eSentire is The Authority in Managed Detection and Response Services, protecting the critical data and applications of 1200+ organizations in 75+ countries from known and unknown cyber threats. Founded in 2001, the company’s mission is to hunt, investigate and stop cyber threats before they become business disrupting events.
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Security advisories — Jun 19, 2020

APT Targeting Australian Interests

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THE THREAT

On Thursday June 18th, 2020, the Australian Cyber Security Center (ACSC) released a report related to ongoing attacks targeting government entities and private organizations located in Australia [1]. The attacks observed make heavy use of publicly available tools and exploits; proof-of-concept exploit code and web shells. The goal of this campaign is not clear at this time, but there are no indications of ransomware or destructive malware based on the contents of the report.

ACSC states this campaign is likely being carried out by a Nation State APT group but does not attempt to attribute the attacks to any specific nation state-group. Organizations with a presence in Australia should be on high alert for unusual activity and phishing emails.

What we’re doing about it

What you should do about it

Additional information

In order to gain initial access into organizations, threat actors attempt to exploit four separate vulnerabilities, CVE-2019-18935 (Telerik), CVE-2019-19781 (Citrix), CVE-2019-0604 (Sharepoint) and the exploitation of VIEWSTATE handling in Microsoft IIS Servers. If these systems are not present or are up to date on security patches, the threat actors shift to using spear phishing emails for initial access.

Once initial access is gained, the threat actors deploy additional tools for persistence on and interaction with victim networks. In order to minimize the likelihood of detection, the threat actors employed stolen credentials for persistence.

Details relating to this campaign are still limited and additional details are expected in the near future.

For additional details on the exploited Citrix vulnerability CVE-2019-19781, see the eSentire advisory Critical Update To Citrix Vulnerability Exploited

For additional details on the exploited Telerik vulnerability CVE-2019-18935, see the eSentire advisory Active Exploitation of CVE-2019-18935

References:

[1] https://www.cyber.gov.au/sites/default/files/2020-06/ACSC-Advisory-2020-008-Copy-Paste-Compromises.pdf

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