(1300 292 371)
You can view all our advisories from this page. Use the filters below to filter by audience type, title and summary and the sort options to sort for the most recently updated or published content.
29 Dec 2021
2021-007: Log4j vulnerability – advice and mitigations
On 10 December 2021, ACSC released an alert relating to a serious vulnerability in versions of the Log4j Java logging library. Malicious cyber actors are using this vulnerability to target and compromise systems globally and in Australia. The ACSC is working with a significant number of victims and affected vendors across all sectors of the economy.
23 Dec 2021
Mitigating Log4Shell and Other Log4j-Related Vulnerabilities
Malicious cyber actors are actively scanning networks to potentially exploit Log4Shell, CVE-2021-45046, and CVE-2021-45105 in vulnerable systems. According to public reporting, Log4Shell and CVE-2021-45046 are being actively exploited. This joint Cybersecurity Advisory is to provide mitigation guidance on addressing vulnerabilities.
10 Dec 2021
Ransomware Profile: Conti
Conti is a ransomware variant first observed in early 2020, used by cybercriminals to conduct ransomware attacks against multiple sectors and organisations worldwide, including Australia. Conti is offered as a Ransomware-as-a-Service (RaaS), enabling affiliates to utilise it as desired, provided that a percentage of the ransom payment is shared with the Conti operators as commission. This product provides information related to Conti’s background, threat activity, and mitigation advice.
22 Nov 2021
Iranian Government-Sponsored APT Cyber Actors Exploiting Microsoft Exchange and Fortinet Vulnerabilities in Furtherance of Malicious Activities
Iranian government-sponsored APT actors are actively targeting a broad range of victims across multiple U.S. critical infrastructure sectors, including the Transportation Sector and the Healthcare and Public Health Sector, as well as Australian organizations.
27 Aug 2021
2021-007: Malicious actors deploying Gootkit Loader on Australian Networks
17 Aug 2021
Vulnerability Affecting BlackBerry QNX RTOS
The ACSC is aware of a vulnerability affecting the BlackBerry QNX, the world’s most prevalent real time operating system.
05 Aug 2021
2021-006: ACSC Ransomware Profile - Lockbit 2.0
The LockBit ransomware restricts access to corporate files and systems by encrypting them into a locked and unusable format. Victims receive instructions on how to engage with the offenders after encryption. LockBit affiliates have successfully deployed ransomware on corporate systems in a variety of countries and sectors, including Australia, where the ACSC is aware of numerous incidents since 2020. LockBit affiliates are known to implement the ‘double extortion’ technique by uploading stolen and sensitive victim information to their dark web site ‘LockBit 2.0’, and threatening to sell and/or release this information if their ransom demands are not met.
09 Jul 2021
Advisory 2021-004: Active exploitation of ForgeRock Access Manager / OpenAM servers
The Australian Signals Directorate’s Australian Cyber Security Centre (ACSC) has identified targeting and compromise of Australian organisations with vulnerable internet-accessible servers running ForgeRock Access Manager (ForgeRock AM). ForgeRock AM was previously known as OpenAM. The ACSC has observed malicious actors exploiting the vulnerability in ForgeRock AM/OpenAM to gain initial access to networks in multiple organisations, and facilitate further access within these networks. On 7 July 2021 the ACSC alerted organisations that this vulnerability was being actively exploited. This ACSC advisory provides recommendations for securing ForgeRock AM against vulnerability CVE-2021-35464, and advice on identifying potential successful exploitation of this vulnerability.
08 May 2021
2021-003: Ongoing campaign using Avaddon Ransomware
The Australian Cyber Security Centre (ACSC) is aware an ongoing ransomware campaign utilising the Avaddon Ransomware malware. This campaign is actively targeting Australian organisations in a variety of sectors. This advisory provides details of Avaddon threat actors, dark web activity, targeted countries and sectors, the malware infection chain, and known Techniques, Tools, and Procedures (TTPs). If activity is identified relating to this advisory please report any findings to the ACSC.
26 Mar 2021
Advisory 2021-002: Active exploitation of vulnerable Microsoft Exchange servers
On 2 March 2021 Microsoft released information regarding multiple exploits being used to compromise instances of Microsoft Exchange Server. Malicious actors are exploiting these vulnerabilities to compromise Microsoft Exchange server. Malicious actors are exploiting these vulnerabilities to compromise Microsoft Exchange servers exposed to the internet, enabling the malicious actor to access email accounts and to enable further compromise of the Exchange server and associated networks.
30 Oct 2020
Advisory 2020-017: Resumption of Emotet malware campaign
The Australian Signals Directorate’s Australian Cyber Security Centre (ACSC) has observed the resumption of an ongoing and widespread campaign of malicious emails designed to spread the Emotet malware across a variety of sectors in the Australian economy, including critical infrastructure providers and government agencies.
22 Sep 2020
Advisory 2020-016: "Zerologon" - Netlogon Elevation of Privilege Vulnerability (CVE-2020-1472)
The ACSC recommends organisations immediately patch affected Microsoft Windows systems with the Microsoft August 2020 Security Updates, released 11/08/2020.
16 Sep 2020
Advisory 2020-008: Copy-paste compromises - tactics, techniques and procedures used to target multiple Australian networks
This advisory details the tactics, techniques and procedures (TTPs) identified during the Australian Cyber Security Centre’s (ACSC) investigation of a cyber campaign targeting Australian networks. These TTPs are captured in the frame of tactics and techniques outlined in the MITRE ATT&CK framework.
02 Sep 2020
Joint Advisory on Technical Approaches to Uncovering and Remediating Malicious Activity
The purpose of this report is to enhance incident response among partners and network administrators along with serving as a playbook for incident investigation.
02 Aug 2020
2020-013 Ransomware targeting Australian aged care and healthcare sectors
Recently there has been a significant increase in healthcare or COVID-19 themed malicious cyber activity, including targeting of the aged care and healthcare sectors by financially motivated cyber criminals using the ‘Maze’ ransomware.
15 Jul 2020
ACSC Advisory 2020-012: Critical remote code execution vulnerability in Windows DNS server (CVE-2020-1350)
An adversary who successfully exploits the vulnerability could run arbitrary code in the context of the Local System Account. The Australian Cyber Security Centre (ACSC) strongly recommends users apply the security patch to their Windows DNS servers to prevent an adversary from exploiting this vulnerability.
14 Jul 2020
2020-011: Critical Vulnerability in SAP NetWeaver Application Server (CVE-2020-6287)
The Australian Cyber Security Centre (ACSC) recommends users of these products urgently apply available security patches to prevent an adversary from exploiting this vulnerability.
22 May 2020
2020-006 Detecting and mitigating exploitation of vulnerability in Microsoft Internet Information Services
This advisory provides indicators of the activity ACSC has observed and details proactive advice on detecting and mitigating potential exploitation of this vulnerability in Microsoft Internet Information Services.
Advisory 2020-004: Remote code execution vulnerability being actively exploited in vulnerable versions of Telerik UI by sophisticated actors
This advisory is focused around the targeting of CVE-2019-18935 but has significant overlap to the previously released ACSC 2019-126 advisory.
20 May 2020
Summary of Tactics, Techniques and Procedures Used to Target Australian Networks
This advisory provides information on methods to detect many of the TTPs listed. Partners are strongly encouraged to review their environments for the presence of the exploited vulnerabilities and provided TTPs.
08 May 2020
Advisory 2020-009: Recommendations to mitigate APT actors targeting health sector and COVID-19 essential services
The ACSC recommends that organisations in the health sector implement the following cyber security mitigations:
20 Apr 2020
Threat update: COVID-19 malicious cyber activity 20 April 2020
The Australian Signals Directorate’s Australian Cyber Security Centre (ACSC) continues to receive reports from individuals, businesses and government departments about a range of different COVID-19 themed scams, online frauds and phishing campaigns. This threat update is about raising awareness of the evolving nature of COVID-19 related malicious cyber activity impacting Australians.
14 Apr 2020
COVID-19: Cyber security tips when working from home
The COVID-19 pandemic has resulted in many people working from home for the first time. Working from home has specific cyber security risks, including targeted cybercrime. When compromised, unauthorised access to your stored information can have a devastating effect on your emotional, financial and working life.
27 Mar 2020
Threat update: COVID-19 malicious cyber activity 27 March 2020
This update is designed to raise awareness of increasing COVID-19 themed malicious cyber activity, and provide practical cyber security advice that organisations and individuals can follow to reduce the risk of being impacted.
COVID-19 themed malicious cyber activity
13 Mar 2020
Cyber security is essential when preparing for COVID-19
In light of the COVID-19 pandemic, organisations are developing strategies to protect staff and vulnerable members of our community.
25 Feb 2020
Recommendations to mitigate DDoS threats being made against Australian organisations
The Australian Signals Directorate's Australian Cyber Security Centre (ACSC) is aware of a number of Denial of Service (DoS) for ransom threats being made against Australian organisations, primarily in the banking and finance sector.
06 Feb 2020
2020-003: Mailto ransomware incidents Recommendations
The ACSC’s recommendations for detecting and preventing the spread of the Mailto ransomware is to update antivirus and other security tools.
29 Jan 2020
Revised patch released to disable mitigation against Spectre variant 2
Intel has confirmed that the microcode updates designed to mitigate Spectre variant 2 (CVE-2017-5715: Branch Target Injection) have introduced an increased risk of system instability, data loss and corruption.
15 Jan 2020
2020-002: Critical Vulnerabilities for Microsoft Windows, Patch Urgently
If you or your organisation uses any of the affected products, the ACSC recommends that you apply the patches urgently.
13 Jan 2020
2020-001-4: Remediation for critical vulnerability in Citrix Application Delivery Controller and Citrix Gateway
On 19 January 2020, Citrix released patches for two versions of the Citrix Application Delivery Controller (ADC) and Citrix Gateway appliances. Citrix expects to have patches available across all supported versions of Citrix ADC, Citrix Gateway and Citrix SD-WAN WANOP before the end of January 2020.
11 Jan 2020
Meltdown and Spectre patches unsuitable for some security products
The ACSC is aware of reporting that a variety of security products (e.g. antivirus solutions) are incompatible with Microsoft's patches for the Meltdown and Spectre vulnerabilities.
08 Nov 2019
2019-131a: Emotet malware campaign recommended actions
The ACSC recommends organisations consider the following actions to mitigate a number of Emotet/Trickbot infections leading to ransomware attacks, most notably a recent attack on the Victorian health sector using the Ryuk ransomware variant.
01 Oct 2019
2019-129: Recommendations to mitigate vulnerability in Pulse Connect Secure VPN Software
The Australian Cyber Security Centre recommends users of the affected Pulse Connect Secure VPN software immediately upgrade their software.
05 Aug 2019
2019-130: Password spray attacks – detection and mitigation strategies
This advisory contains detection and mitigation guidance, some of which has been successfully deployed in recent investigations.
30 Jul 2019
ICS-CERT advisories link from the US Department of Homeland Security
03 Jul 2019
2019-009: Recommendations for securing unprotected network and data services
All Australian businesses and organisations should ensure they have implemented strong user authentication and access controls on their databases and network infrastructure.
06 Jun 2019
Mitigation for Microsoft Windows Security Vulnerability – ‘BlueKeep’ (CVE-2019-0708)
The Australian Signals Directorate’s Australian Cyber Security Centre (ACSC) advises Windows users to ensure their systems are patched and up to date after Microsoft’s recent disclosure of new remote desktop vulnerability.
16 May 2019
2019-126: Recommendations for mitigation of vulnerable version of Telerik UI
The tools to exploit this vulnerability have been publicly published and require only basic knowledge or skills to use successfully. Any servers currently running a vulnerable version should be considered at risk and remediation steps should be taken.
06 May 2019
ACSC Advisory 2019-125: Targeting of Microsoft SharePoint CVE-2019-0604
This ACSC advisory provides recommendations for securing Microsoft SharePoint and advice on identifying potential successful exploitation of this vulnerability.
15 Mar 2019
Recommendations to protect 773M accounts affected by 'Collection #1' breach
This advisory provides recommendations for protecting 773M accounts affected by 'Collection #1' breach.
09 Jan 2019
Advice remains that organisations should patch Meltdown/Spectre vulnerabilities
Recent media reporting has indicated that applying the patches for these vulnerabilities can lead to performance issues, and can impact on the availability of third party software.
05 Jan 2019
Patch your devices for Meltdown and Spectre vulnerabilities as soon as possible
A malicious actor could possibly use this vulnerability to gain access to areas of memory they should not have permission to access. This could result in malicious actors obtaining sensitive data, such as passwords.
29 Sep 2018
Recommendations to mitigate Facebook flaw in 'View As' feature
This advisory provides information about how to protect yourself to minimise the risk of further breaches caused by attackers exploiting the flaw in the 'View As' feature on Facebook.
17 May 2018
Information about vulnerability in the Drupal content management system
Drupal assesses this vulnerability as critical. If you are using a version of Drupal prior to 7.58 or 8.51, the ACSC recommends that you upgrade immediately as per Drupal's advice.
15 May 2018
Protecting against VPNFilter malware
Once a malicious actor compromises a device using VPNFilter malware, they are able to collect network traffic (including website credentials) traversing the device. Importantly, the malware can also be used to disable the device.
17 Apr 2018
Secure the Cisco IOS and IOS XE Smart Install Feature
Organisations are advised to identify Cisco devices running Smart Install within their networks, evaluate the need of running this feature, and remove or secure the feature as required. Both the ACSC and Cisco documentation contain details on how to accomplish this.
29 Jun 2017
Update on the initial infection vector of the Petya ransomware campaign
This is an example of where a lack of patching and continued use of out-dated protocols presents a significant risk to organisational IT security.
28 Jun 2017
Update on Petya ransomware campaign
The ACSC is aware of a large-scale ransomware campaign that is impacting organisations globally. The campaign is variously known as 'Petya', 'NotPetya', 'SortaPetya', 'Petna' or 'GoldenEye'.
15 Nov 2015
Web Shells – Threat Awareness and Guidance
This advisory outlines the Web shells threat and provides prevention, detection and mitigation strategies for administrators of web servers that have active content languages installed.
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