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Australian telecom giant Optus on Monday confirmed that nearly 2.1 million of its current and former customers suffered a leak of their personal information and at least one form of identification number as a result of a  data breach  late last month. The company also  said  it has engaged the services of Deloitte to conduct an external forensic assessment of the attack to "understand how it occurred and how we can prevent it from occurring again." Optus is fully owned by Singaporean telecommunications conglomerate Singtel, which also has a significant stake in Bharti Airtel, the second largest carrier in India. "Approximately 1.2 million customers have had at least one number from a current and valid form of identification, and personal information, compromised," Singtel  said  in an announcement made on its website. It also said the breach affected expired IDs and personal information of about 900,000 additional customers. It further emphasized that...

A threat actor likely with associations to China has been attributed to a new supply chain attack that involves the use of a trojanized installer for the Comm100 Live Chat application to distribute a JavaScript backdoor. Cybersecurity firm CrowdStrike said the attack made use of a signed Comm100 desktop agent app for Windows that was downloadable from the company's website. The scale of the attack is currently unknown, but the trojanized file is said to have been identified at organizations in the industrial, healthcare, technology, manufacturing, insurance, and telecom sectors in North America and Europe. Comm100 is a Canadian provider of live audio/video chat and customer engagement software for enterprises. It  claims  to have more than 15,000 customers across 51 countries. "The installer was signed on September 26, 2022 at 14:54:00 UTC using a valid Comm100 Network Corporation certificate," the company  noted , adding it remained available until September 29. E...

The recently discovered Linux-Based ransomware strain known as Cheerscrypt has been outed as a handiwork of a Chinese cyber espionage group known for operating short-lived ransomware schemes . Cybersecurity firm Sygnia attributed the attacks to a threat actor it tracks under the name Emperor Dragonfly, which is also known as Bronze Starlight (Secureworks) and DEV-0401 (Microsoft). "Emperor Dragonfly deployed open source tools that were written by Chinese developers for Chinese users," the company said in a report shared with The Hacker News. "This reinforces claims that the 'Emperor Dragonfly' ransomware operators are based in China." The use of Cheerscrypt is the latest addition to a long list of ransomware families previously deployed by the group in little over a year, including LockFile, Atom Silo, Rook, Night Sky, Pandora, and LockBit 2.0. Secureworks, in its profile of the group, noted "it is plausible that Bronze Starlight deploys ransomw...

The North Korea-backed Lazarus Group has been observed deploying a Windows rootkit by taking advantage of an exploit in a Dell firmware driver, highlighting new tactics adopted by the state-sponsored adversary. The Bring Your Own Vulnerable Driver ( BYOVD ) attack, which took place in the autumn of 2021, is another variant of the threat actor's espionage-oriented activity called Operation In(ter)ception  that's directed against aerospace and defense industries. "The campaign started with spear-phishing emails containing malicious Amazon-themed documents and targeted an employee of an aerospace company in the Netherlands, and a political journalist in Belgium," ESET researcher Peter Kálnai  said . Attack chains unfolded upon the opening of the lure documents, leading to the distribution of malicious droppers that were trojanized versions of open source projects, corroborating recent reports from Google's  Mandiant  and  Microsoft . ESET said it uncovered ev...

A former U.S. National Security Agency (NSA) employee has been arrested on charges of attempting to sell classified information to a foreign spy, who was actually an undercover agent working for the Federal Bureau of Investigation (FBI). Jareh Sebastian Dalke, 30, was employed at the NSA for less than a month from June 6, 2022, to July 1, 2022, serving as an Information Systems Security Designer as part of a temporary assignment in Washington D.C. According to an  affidavit  filed by the FBI, Dalke was also a member of the U.S. Army from about 2015 to 2018 and held a Secret security clearance, which he received in 2016. The defendant further held a Top Secret security clearance during his tenure at the NSA. "Between August and September 2022, Dalke used an encrypted email account to transmit excerpts of three classified documents he had obtained during his employment to an individual Dalke believed to be working for a foreign government," the Justice Department (DoJ) ...

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Microsoft on Friday disclosed that a single activity group in August 2022 achieved initial access and breached Exchange servers by chaining the  two newly disclosed zero-day flaws  in a limited set of attacks aimed at less than 10 organizations globally. "These attacks installed the Chopper web shell to facilitate hands-on-keyboard access, which the attackers used to perform Active Directory reconnaissance and data exfiltration," the Microsoft Threat Intelligence Center (MSTIC)  said  in a new analysis. The weaponization of the vulnerabilities is expected to ramp up in the coming days, Microsoft further warned, as malicious actors co-opt the exploits into their toolkits, including deploying ransomware, due to the "highly privileged access Exchange systems confer onto an attacker." The tech giant attributed the ongoing attacks with medium confidence to a state-sponsored organization, adding it was already investigating these attacks when the Zero Day Initiative d...

The U.S. Cybersecurity and Infrastructure Security Agency (CISA) on Friday  added  a recently disclosed critical flaw impacting Atlassian's Bitbucket Server and Data Center to the Known Exploited Vulnerabilities ( KEV ) catalog, citing evidence of active exploitation. Tracked as  CVE-2022-36804 , the issue relates to a command injection vulnerability that could allow malicious actors to gain arbitrary code execution on susceptible installations by sending a specially crafted HTTP request. Successful exploitation, however, banks on the prerequisite that the attacker already has access to a public repository or possesses read permissions to a private Bitbucket repository. "All versions of Bitbucket Server and Datacenter released after 6.10.17 including 7.0.0 and newer are affected, this means that all instances that are running any versions between 7.0.0 and 8.3.0 inclusive are affected by this vulnerability," Atlassian  noted  in a late August 2022 advisory....

Threat actors have been found deploying never-before-seen post-compromise implants in VMware's virtualization software to seize control of infected systems and evade detection. Google's Mandiant threat intelligence division referred to it as a "novel malware ecosystem" that impacts VMware ESXi, Linux vCenter servers, and Windows virtual machines, allowing attackers to maintain persistent access to the  hypervisor  as well as execute arbitrary commands. The  hyperjacking attacks , per the cybersecurity vendor, involved the use of malicious vSphere Installation Bundles ( VIBs ) to sneak in two implants, dubbed VIRTUALPITA and VIRTUALPIE, on the ESXi hypervisors. "It is important to highlight that this is not an external remote code execution vulnerability; the attacker needs admin-level privileges to the ESXi hypervisor before they can deploy malware," Mandiant researchers Alexander Marvi, Jeremy Koppen, Tufail Ahmed, and Jonathan Lepore said in an exhaus...

An espionage-focused threat actor has been observed using a steganographic trick to conceal a previously undocumented backdoor in a Windows logo in its attacks against Middle Eastern governments. Broadcom's Symantec Threat Hunter Team attributed the updated tooling to a hacking group it tracks under the name  Witchetty , which is also known as  LookingFrog , a subgroup operating under the TA410 umbrella. Intrusions involving TA410 – which is believed to share connections with a Chinese threat group known as APT10 (aka Cicada, Stone Panda, or TA429) – primarily feature a modular implant called LookBack. Symantec's latest analysis of attacks between February and September 2022, during which the group targeted the governments of two Middle Eastern countries and the stock exchange of an African nation, highlights the use of another backdoor dubbed Stegmap. The new malware leverages  steganography  – a technique used to embed a message (in this case, malware) in a n...

A social engineering campaign leveraging job-themed lures is weaponizing a years-old remote code execution flaw in Microsoft Office to deploy Cobalt Strike beacons on compromised hosts. "The payload discovered is a leaked version of a Cobalt Strike beacon," Cisco Talos researchers Chetan Raghuprasad and Vanja Svajcer  said  in a new analysis published Wednesday. "The beacon configuration contains commands to perform targeted process injection of arbitrary binaries and has a high reputation domain configured, exhibiting the redirection technique to masquerade the beacon's traffic." The malicious activity, discovered in August 2022, attempts to exploit the vulnerability  CVE-2017-0199 , a remote code execution issue in Microsoft Office, that allows an attacker to take control of an affected system. The entry vector for the attack is a phishing email containing a Microsoft Word attachment that employs job-themed lures for roles in the U.S. government and Publ...

Endpoint devices like desktops, laptops, and mobile phones enable users to connect to enterprise networks and use their resources for their day-to-day work. However, they also expand the attack surface and make the organisation vulnerable to malicious cyberattacks and data breaches. Why Modern Organisations Need EDR According to the 2020 global  risk report  by Ponemon Institute, smartphones, laptops, mobile devices, and desktops are some of the most vulnerable entry points that allow threat actors to compromise enterprise networks. Security teams must assess and address the security risks created by these devices before they can damage the organisation. And for this, they require Endpoint Detection & Response (EDR). EDR solutions provide real-time visibility into endpoints and detect threats like malware and ransomware. By continuously monitoring endpoints, they enable security teams to uncover malicious activities, investigate threats, and initiate appropriate respon...

A "highly operational, destructive, and sophisticated nation-state activity group" with ties to North Korea has been weaponizing open source software in their social engineering campaigns aimed at companies around the world since June 2022. Microsoft's threat intelligence teams, alongside LinkedIn Threat Prevention and Defense, attributed the intrusions with high confidence to Zinc, a threat group affiliated with Lazarus which is also tracked under the name Labyrinth Chollima.  Attacks targeted employees in organizations across multiple industries, including media, defense and aerospace, and IT services in the U.S., the U.K., India, and Russia. The tech giant  said  it observed Zinc leveraging a "wide range of open-source software including PuTTY, KiTTY, TightVNC, Sumatra PDF Reader, and muPDF/Subliminal Recording software installer for these attacks." According to  CrowdStrike , Zinc "has been active since 2009 in operations aimed at collecting polit...