CVE-2023-38831

Ukraine’s CERT-UA warns of phishing attacks by UAC-0099 targeting defense sectors, using malware like MATCHBOIL, MATCHWOK, and DRAGSTARE. Ukraine’s CERT-UA warns of phishing attacks by threat actor UAC-0099 targeting government and defense sectors, delivering malware like MATCHBOIL and DRAGSTARE. The National Cyber Incident, Cyber Attack, and Cyber Threat Response Team CERT-UA investigated multiple attacks against […]

Intelligence and cybersecurity agencies from 10 countries has warned in a joint advisory that a cyberespionage group operated by the Russian military intelligence service, the GRU, has been targeting logistics and IT companies for the past three years. Known in the security industry as APT28 and Fancy Bear, the threat actor has been launching attacks […]

CISA warns Russia-linked group APT28 is targeting Western logistics and tech firms aiding Ukraine, posing an elevated threat to supply chains Russia-linked cyberespionage group APT28 intensifies its operations against Western logistics and technology companies moving supplies into Ukraine, US CISA warns. The APT28 group (aka Fancy Bear, Pawn Storm, Sofacy Group, Sednit, BlueDelta, and STRONTIUM) has been active since at least 2007 and it […]

The India-linked threat actor SloppyLemming has been targeting government, law enforcement, and other entities in Pakistan.

A group of hacktivist known as Head Mare took advantage of the recent CVE-2023-38831 WinRAR flaw in attacks against organizations in Russia and Belarus. Kaspersky researchers reported that a hacktivist group known as Head Mare exploited recently disclosed WinRAR flaw CVE-2023-38831 in attacks against organizations in Russia and Belarus. Head Mare has been active since at least 2023 exclusively targeting companies in Russia […]

Russia-linked threat actor FlyingYeti is targeting Ukraine with a phishing campaign to deliver the PowerShell malware COOKBOX. Cloudflare researchers discovered phishing campaign conducted by a Russia-linked threat actor FlyingYeti (aka UAC-0149) targeting Ukraine. The experts published a report to describe real-time effort to disrupt and delay this threat activity. At the beginning of Russia’s invasion of Ukraine […]

The threat actor UAC-0099 is exploiting a flaw in the WinRAR to deliver LONEPAGE malware in attacks against Ukraine. A threat actor, tracked as UAC-0099, continues to target Ukraine. In some attacks, the APT group exploited a high-severity WinRAR flaw CVE-2023-38831 to deliver the LONEPAGE malware. UAC-0099 threat actor has targeted Ukraine since mid-2022, it was spotted […]

A threat group associated with the Russian military intelligence service was behind several mass attack campaigns that exploited known flaws in Outlook and WinRAR to collect Windows NTLM credential hashes from organizations in Europe and North America. The high volume of emails is unusual for cyberespionage groups, which are typically highly targeted in their victim […]

Russian state-backed hacking group Forest Blizzard (aka Fancy Bear, aka APT28) has been using a known Microsoft Outlook vulnerability (CVE-2023-23397) to target public and private entities in Poland, Polish Cyber Command has warned. Compromising email accounts and maintaining access to them APT28 is known for targeting government, non-governmental, energy and transportation organizations in the US, Europe, and the Middle East. The most recent attacks were detected and reported by the computer security incident response team … More →

Microsoft warns that the Russia-linked APT28 group is actively exploiting the CVE-2023-23397 Outlook flaw to hijack Microsoft Exchange accounts. Microsoft’s Threat Intelligence is warning of Russia-linked cyber-espionage group APT28 (aka “Forest Blizzard”, “Fancybear” or “Strontium”) actively exploiting the CVE-2023-23397 Outlook flaw to hijack Microsoft Exchange accounts and steal sensitive information. The APT28 group (aka Fancy Bear, Pawn Storm, Sofacy Group, Sednit, BlueDelta, […]

For the latest discoveries in cyber research for the week of 20th November, please download our Threat_Intelligence Bulletin. TOP ATTACKS AND BREACHES Russia-affiliated military intelligence group SandWorm is reportedly responsible for an attack against 22 critical infrastructure companies in Denmark. The attacks, most severe in Danish history, have compromised industrial control systems and forced companies […]

Russia-linked cyberespionage group APT29 has been observed leveraging the CVE-2023-38831 vulnerability in WinRAR in recent attacks. The Ukrainian National Security and Defense Council (NDSC) reported that APT29 (aka SVR group, Cozy Bear, Nobelium, Midnight Blizzard, and The Dukes) has been exploiting the CVE-2023-38831 vulnerability in WinRAR in recent attacks. APT29 along with APT28 cyber espionage group was involved in the Democratic National Committee […]

The DarkCasino APT group leveraged a recently disclosed WinRAR zero-day vulnerability tracked as CVE-2023-38831. Researchers at cybersecurity firm NSFOCUS analyzed DarkCasino attack pattern exploiting the WinRAR zero-day vulnerability tracked as CVE-2023-38831. The economically motivated APT group used specially crafted archives in phishing attacks against forum users through online trading forum posts. “DarkCasino is an APT […]

A new round of the weekly SecurityAffairs newsletter arrived! Every week the best security articles from Security Affairs are free for you in your email box. Enjoy a new round of the weekly SecurityAffairs newsletter, including the international press. A threat actor is selling access to Facebook and Instagram’s Police Portal Threat actors breached Okta […]

Here’s an overview of some of last week’s most interesting news, articles, interviews and videos: North Korean hackers are targeting software developers and impersonating IT workers State-sponsored North Korean hackers have significantly intensified their focus on the IT sector in recent years, by infiltrating firms developing software and companies lookind for IT workers. The collaborative power of CISOs, CTOs and CIOs for a secure future In this Help Net Security interview, Phil Venables, CISO at … More →

Google TAG reported that both Russia and China-linked threat actors are weaponizing the a high-severity vulnerability in WinRAR. Google’s Threat Analysis Group (TAG) reported that in recent weeks multiple nation-state actors were spotted exploiting the vulnerability CVE-2023-38831 in WinRAR. The researchers reported that several cybercrime groups began exploiting the flaw in early 2023, when the […]

Google says it is still catching government-backed groups linked to China and Russia launching WinRAR exploits in targeted attacks.

A number of government-backed APTs are exploiting CVE-2023-38831, a file extension spoofing vulnerability in WinRAR, a widely used file archiver utility for Windows. CVE-2023-38831 has been patched in August 2023, along with another high-severity RCE vulnerability (CVE-2023-40477). Exploited as a zero-day by cybercriminals since April 2023, the vulnerability is now also being used by state-sponsored hacking groups. “The widespread exploitation of the WinRAR bug highlights that exploits for known vulnerabilities can be highly effective, despite … More →

A new round of the weekly SecurityAffairs newsletter arrived! Every week the best security articles from Security Affairs are free for you in your email box. Enjoy a new round of the weekly SecurityAffairs newsletter, including the international press. Lockbit ransomware gang demanded an 80 million ransom to CDW CISA warns of vulnerabilities and misconfigurations […]

For the latest discoveries in cyber research for the week of 28th August, please download our Threat_Intelligence Bulletin TOP ATTACKS AND BREACHES An ongoing espionage campaign targeting dozens of organizations in Taiwan has been discovered. Researchers have attributed the activity to a Chinese APT group dubbed Flax Typhoon, which overlaps with Ethereal Panda. The threat […]

Here’s an overview of some of last week’s most interesting news, articles, interviews and videos: Network detection and response in the modern era In this Help Net Security interview, David Gugelmann, CEO at Exeon, sheds light on the current cyber threats and their challenges for network security. He discusses the role of Network Detection and Response (NDR) solutions that leverage machine learning algorithms to improve threat detection and streamline incident response. Lazarus Group exploited ManageEngine … More →

Weekly cybersecurity news roundup that provides a summary of noteworthy stories that might have slipped under the radar for the week of August 21, 2023.

A financially motivated cybercrime group has exploited a WinRAR zero-day to deliver malware to traders and steal their money.

Financially-motivated attackers have exploited a zero-day vulnerability in WinRAR (CVE-2023-38831) to trick traders into installing malware that would allow them to steal money from broker accounts. “This vulnerability has been exploited since April 2023,” says Group-IB malware analyst Andrey Polovinkin. Devices of at least 130 traders (and likely more) have been infected with malware in this campaign. CVE-2023-38831 exploited CVE-2023-38831 is a file extension spoofing vulnerability, which allowed attackers to create a modified RAR or … More →