AI Chatbot Vulnerabilities
September 20, 2023
Cybercriminals are leveraging artificial intelligence to craft sophisticated email threats, signifying a notable shift in the role of AI in email security.
Feds Warn Healthcare Sector
September 19, 2023
Federal authorities have issued a warning to the healthcare sector regarding the emerging threat posed by the Akira ransomware-as-a-service group.
FBI Warns About Recovery Scams
August 24, 2023
The FBI is warning organizations of an increase in scammers pretending to be recovery companies. Cyber recovery scams, also known as data recovery scams, play on the vulnerabilities and emotions of individuals who have experienced data loss or other digital disasters.
Malicious QR Codes Attacking the Energy Sector
August 23, 2023
Since May 2023, a large phishing campaign is utilizing Quick Response (QR) codes in an attempt to collect Microsoft credentials from victims. The emails masquerade as a Microsoft security notification with a QR code embedded inside a PNG image or a PDF attachment.
BumbleBee Downloader Now Being Distributed via Malicious Ads
May 5, 2023
In early 2023, the threat actors behind the BumbleBee malware shifted to a new delivery method, opting to use malicious online ads to spread the downloader.
Malware Targeting Linux Systems
April 20, 2023
The Critical Start Cyber Threat Intelligence Team is aware of and monitoring a trend in malware being developed to specifically target Linux systems. Targeting of Linux systems has been relatively scarce and primitive in comparison to other proprietary operating systems.
FBI Warns of Public Charging Station Vulnerabilities
April 19, 2023
The FBI recently released a warning to avoid free public charging stations as they are potentially being compromised by threat actors. Cyber criminals are using public charging stations to infect devices with malware or monitoring software that enables the threat actor to access your phone, tablet, or computer, also referred to as “Juice Jacking.”
New LockBit Ransomware Encryptor Targets macOS
April 18, 2023
Russian-based ransomware group LockBit continues to expand its arsenal with the addition of a new variant specifically targeting macOS. Cybersecurity researcher MalwareHunterTeam discovered a ZIP (.zip file) archive on VirusTotal containing various available LockBit encryptors.
Threat Actors Exploiting Tax Season
April 13, 2023
Mustang Panda APT
April 12, 2023
Chinese advanced persistent threat (APT) actor, Mustang Panda (a.k.a. Earth Preta, RedDelta or BRONZE PRESIDENT) is delivering lure archives via spear-phishing emails and Google Drive links.
WiFi Protocol Vulnerability Exposing Network Traffic
April 11, 2023
Research has revealed that the Cisco Wireless Access Point products and Cisco Meraki products with wireless capabilities have a vulnerability in the WiFi protocols built–in power save mechanism that could allow an adversary to meddle with traffic, client connections, and more.
Threat Actors Experimenting with QR Codes
April 10, 2023
The Federal Bureau of Investigation (FBI) released an advisory on cyber criminals tampering and switching legitimate QR codes. Since October 2022, the use of QR codes within phishing scams has risen.
April 6, 2023
Separately, Palo Alto Networks issued an informational security advisory discussing Rorschach ransomware operators using the Cortex XDR Dump Service Tool (cydump.exe) to load untrusted dynamic link libraries (DLLs) using DLL-sideloading. This is true only when the tool is removed from its installation directory; it is not possible to side-load DLLs when Cortex XDR agent is installed on Windows and is running from the installation path because Cortex XDR’s security permissions and protections prevent it. In the advisory, Palo Alto verified that Cortex XDR 7.7, and newer versions, with content update version 240 (released Nov 2021), and later content updates, detect and block the ransomware. New versions of Cortex XDR agent, capable of blocking the DLL side-loading technique, will be released next week to prevent future misuse of the software. Mac OS and Linux platforms are not affected by this issue.
Security researchers have discovered a new ransomware strain, called Rorschach, with unique technical features. The malware is deployed using the dynamic link library (DLL) side-loading technique via a signed component in Cortex XDR, a threat detection and incident response tool from Palo Alto Networks.
Third Party Vendor Risks and What you Should Know
March 22, 2023
In 2022, a spike in targeting third-party vendors almost doubled from 2021, with 63 attacks on vendors being reported and 298 victims. This trend of increasing attacks on third-party vendors has only continued in Q1 of 2023 as several third-party vendors have reported being attacked by malicious campaigns. There are several dangers when third-party vendors are attacked.
Two-Step Phishing Attacks
March 21, 2023
Two-step phishing attacks are on the rise as threat actors become more sophisticated in targeting potential victims and evading detection. These phishing attacks use legitimate vendors that the threat actor has previously compromised.
Microsoft Outlook Zero-Day Exploited in the Wild
March 21, 2023
Microsoft disclosed a new zero-day vulnerability in Outlook identified as CVE-2023-23397. This flaw is an elevation-of-privilege (EoP) vulnerability that enables remote code execution capability as threat actors can steal NTLM credentials of Microsoft Outlook users.
Emotet Returns After Three Months of Silence
March 17, 2023
After a brief hiatus, Emotet threat actors have re-commenced operations as of early March 2023. Originally tracked as a banking trojan, Emotet has evolved into a multi-purpose dropper/downloader malware.
Sharp Panda Utilizes New Version of the Soul Framework
March 8, 2023
Sharp Panda, (also known as APT19, Emissary Panda, or Iron Tiger) is a sophisticated Chinese Advanced Persistent Threat (APT) group. The group has been active since at least 2012 and is known for sharing tools and infrastructure with other Chinese APT groups.
Threat Actors Using Microsoft OneNote
February 13, 2023
Recently, several malware operators have been spotted using OneNote attachments in their spam campaigns. OneNote is a powerful digital notebook tool offered by Microsoft. It provides users with a centralized location to store their thoughts, ideas, and notes in an organized manner. Cyber criminals have started new phishing campaigns delivering malicious OneNote attachments that deliver Formbook, Redline Stealer, AsyncRat or Qbot malware to unsuspecting victims.
February 3, 2023
Russian-based ransomware group LockBit continues to expand its arsenal with the addition of a new variant, LockBit Green. The acquisition of Green comes less than a year after the deployment of LockBit Black. Threat researchers at SentinelOne indicated a large portion of this variant overlaps with the Conti ransomware version whose source code was leaked last year. LockBit is expected to continue to dominate the ransomware arena as the operators make strides to increase its capabilities and versatility.
January 10, 2023
Adversary-in-the-middle (AiTM) phishing campaigns are a growing threat because they are highly effective and can bypass even the most advanced security measures. They are particularly dangerous when they target large organizations, which can have a significant impact on the organization’s operations and reputation. Phishing remains to be one of the most common techniques attackers use in their attempts to gain initial access to organizations. It remains important for organizations to be vigilant and aware of this type of attack and take steps to protect themselves.
November 1, 2022
OpenSSL published an advisory detailing two new vulnerabilities CVE-2022-3786 (“X.509 Email Address Variable Length Buffer Overflow”) and CVE-2022-3602 (“X.509 Email Address 4-byte Buffer Overflow”); both classified as high. Although initially assessed as a critical vulnerability, CVE-2022-3602, was downgraded to high due to unlikely remote code execution in common configurations. These vulnerabilities impact OpenSSL 3.0.0-3.0.6 ONLY. Users should upgrade to 3.0.7 as soon as possible. Those unable to immediately update should disable TLS client authentication. Currently there are no known exploits in the wild.
Our CTI team will continue to monitor these known vulnerabilities and work closely with the Threat Detection Engineering (TDE) team and the SOC to implement any relevant detections. For future updates the CTI team will continue to post on the Intelligence Hub and give updates via ZTAP bulletins.
October 31, 2022
Critical Start CTI team is aware of a new OpenSSL vulnerability that will be disclosed tomorrow, November 1st. Details and characteristics of the flaw have not been released, however due to the critical classification of the vulnerability we recommend updating to the new version of OpenSSL (version 3.0.7) being released on Tuesday, November 1st. The CTI team will be working closely with the Threat Detection Engineering (TDE) team and the SOC to implement any relevant detections. Critical Start CTI team will continue to monitor the situation.
July 7, 2022
In early June 2022, CISA published a Joint Cybersecurity Advisory (CSA) highlighting espionage activity related to Chinese state-sponsored advanced persistent threat (APT) groups targeting telecommunications companies. Furthermore, there has been an increase in open and closed-source identification and reporting of Chinese threat actor activities over the last month. Critical Start Cyber Threat Intelligence analysts will be monitoring this situation closely as it evolves.
Critical Start supports the CISA backed recommended actions listed below:
May 19, 2022
The ransomware group formerly known as Conti is currently shut down.
The admin panel of the gang’s official website, Conti News, is shut down as is the negotiations service site. Meanwhile the rest of the infrastructure, to include chatrooms, messengers, servers, and proxy hosts are going through a massive reset. This was an intentional decision, months in the making, to attempt to shed some of the group’s toxic branding.
For over two months, the Conti collective silently created subdivisions that began operations before the start of the shutdown process. These subgroups either utilize existing Conti alter egos and locker malware or took the opportunity to create new ones. The group is adopting a network organizational structure, more horizontal and decentralized than the previously rigid Conti hierarchy.
The new network will include the following types of groups:
This model is more flexible and adaptive than the previous Conti hierarchy but is more secure and resilient than Ransomware-as-a-Service (RaaS).
The other major development for this new ransomware model is the transition from data encryption to data exfiltration. Relying on pure data exfiltration maintains most major benefits of a data encryption operation, while avoiding the issues of a locker altogether. Most likely, this will become the most important outcome of Conti’s re-brand.
May 9, 2022
The Critical Start CTI team observed a pattern of breaches over the last five weeks related to higher education being targeted by ransomware. Two out of the four southern schools, Florida International University and North Carolina A&T University, have been linked to BlackCat (a.k.a., ALPHV). No threat actors have claimed responsibility for the latest, Austin Peay State University, reported on by Critical Start CTI earlier this month, but the school is still investigating. Around the country there have been at least 13 reported attacks against U.S. universities and colleges in 2022 so far. These include Kellogg Community College, targeted last week, Ohlone College, Savannah State University, University of Detroit Mercy, Centralia College, Phillips Community College of the University of Arkansas and National University College, to name a few.
BlackCat, (aka ALPHVM, ALPHV, and Noberus) is a newly emerged ransomware-as-a-Service (RaaS) group assessed to be a re-branding of BlackMatter and DarkSide groups. BlackCat ransomware emerged in November 2021 and is developed in Rust, a cross-compilation language allowing for rapid development of malware for Windows and Linux. The ransomware executable is highly customizable, with different encryption methods (AES, ChaCha20) and options allowing for attacks on a wide range of corporate environments. Common TTPs include the use of a signed binary proxy to download the ransomware, access token manipulation and UAC bypass for privilege escalation, deleting files and logs on host for defense evasion purposes, and the use of SMB and PsExec for lateral movement.
We Recommended That You
March 29, 2022
BazarCall was used by Ryuk and Conti in 2020/2021 and has made a reappearance in March 2022 targeting several companies across multiple industries. Using the BazarCall Tactic, Conti creates a fake call center from which calls are made to potential victims convincing them to open malicious email attachments. These malicious attachments exploit Atera remote monitoring software, Cobalt Strike, and Sliver C2 Framework, then delivers BazarLoader.
It’s important to note that phone calls are made following extensive social engineering and reconnaissance activities. Previous breaches involving these tactics have provided evidence that call center personnel have convincing information regarding target company operations.
We recommend that you:
March 28, 2022
CTO Randy Watkins provides more information about the group behind the breach in this informal breakdown of what we know now.
March 23, 2022
Critical Start is monitoring the recent breach against Okta and the associated third-party
service providers that support Okta’s operations.
Okta says 366 corporate customers, or about 2.5% of its customer base, were impacted by a security breach that allowed hackers to access the company’s internal network. The company only acknowledged the compromise after the Lapsus$ hacking and extortion group posted screenshots on Monday, nearly two months after the hackers first gained access to its network.
Key points to know:
Critical Start always recommends customers enable MFA for all user accounts. Passwords alone do not
offer the necessary level of protection against attacks. We strongly recommend the usage of hard keys,
as other methods of MFA can be vulnerable to phishing attacks.
Russian Cyber Attacks: Threat Actors and New Developments
Russia’s attack on Ukraine has heightened concerns around cyber threats. We dive into likely threat actors and emerging attacks like Hermetic Malware and WhisperGate in more detail.
Russian Focus Hides Iranian APT Activity 12:30pm CT
CTI is also monitoring the situation unfolding in Iran and the implications of the Russia/Ukraine situation functioning as a distraction for other APT activity
What we know now:
The following MITRE TTPs apply:
Additional reading and resources:
Hermetic Malware 10:45am CT
We are analyzing Hermetic Malware samples. We know that the initial indicators of this sample began circulating on 2/23/22 by way of a signed driver that erases windows devices after deleting their shadow copies.
We have several known IOCs which are being passed to our Detection Engineering team.
This appears to be a clear effort of destabilization via MDM strategy; Russia has a huge arsenal of cyber capabilities and we have a very consistent record of them targeting Ukraine in this way, thus Russia’s ability to take down critical infrastructure and control the Ukrainian narrative is not surprising.
Often, these attacks and campaigns are attributed to a nonstate actors or individual cyber criminals but the nod from the Russian Federation and the contractive interactions between them and the organized hackers provides a smoke screen between the APT and Russian leadership.
Log4Shell is a Remote Code Execution vulnerability with the Open Source Apache Log4j framework that is part of the Apache Logging Project. This is the most widely used logging framework on millions of systems worldwide and many governments have rated the risk a 10 out of 10, or “red” level risk of the highest severity.
To put this event into laymen’s terms: If 95% of all garage doors installed from 2016-2021 could be opened from any Internet Web Browser…from anywhere around the world… This is the significance of Log4shell.
Critical Start takes a closer look at the SolarWinds breach through two January information sessions.
With the breach linked back to the use of Solarwinds’ updater as the distribution mechanism for the backdoor, finding out who had been affected was easy, and the results were devastating.
CRITICALSTART® and MOBILESOC® are federally registered trademarks owned by Critical Start. Critical Start also claims trademark rights in the following: Cyber Operations Risk & Response™ platform, and Trusted Behavior Registry®. Any unauthorized use is expressly prohibited.