Tuesday, July 16, 2024
EHA

Cisco Was Hacked by Yanluowang Ransomware Operators to Stole Internal Data

Recent reports indicate that in late May Cisco corporate network was Hacked with ransomware from the Yanluowang group. 

Under the threat of leaking stolen files to the online world, the threat actor attempted to intimidate the victims into making a financial sacrifice; in short, ransom.

An employee’s Box folder linked to a compromised account was only accessible to attackers for harvesting casual data. It has been determined that Cisco has not identified any Hacked on its products or business.

In a recent security incident, bad actors released an extensive list of files from the incident on the dark web to the public on August 10. 

Breaching Cisco’s Network

By using stolen credentials belonging to an employee of Cisco’s network, Yanluowang operators were able to access Cisco’s network. 

During the process, they compromised the employee’s personal Google account, which contained login credentials synced from the employee’s browser, and hijacked the account.

A Cisco employee was tricked by the attacker into accepting push notifications for MFA. Here the attacker used a series of voice phishing attacks and MFA fatigue in order to do so and manipulate the victim.

It did not take Yanluowang operators long to spread to Citrix servers and domain controllers after they gained a foothold within the company’s corporate network.

Tools Used

They then used enumeration tools after gaining administrative access to the domain, such as:- 

  • ntdsutil
  • adfind
  • secretsdump 

A primary objective of these criminals is to collect additional information from compromised computers and to install backdoors as well as payloads onto them. 

It should be noted that Cisco did detect them and expelled them from its network, but they continued their attempts as the weeks went by to obtain access again.

There were numerous illicit activities carried out by the threat actor after gaining initial access to the system.

Recommendations

As part of the remediation process, Cisco reinforced all the security measures in their IT security environment, as this will reduce the impact of the incident. 

There has been no observation or deployment of ransomware, however. The incident has been discovered by Cisco and attempts have been successfully blocked since the discovery has taken place.

Here below we have mentioned all the security measures recommended by Cisco:-

  • Make sure to enable MFA.
  • Employees should be informed as to whom they should contact in the event of an incident of this nature.
  • Enforce stricter controls around the device status to ensure strong device verification.
  • Unmanaged or unknown devices should be restricted or blocked from enrollment and access.
  • Enforce a baseline set of security controls by enabling posture checking before enabling VPN connections from remote endpoints.
  • Another important security control is the segmentation of the network.
  • The collection of logs should be centralized.
  • Maintaining an offline backup strategy and testing the backups periodically is important.
  • Performing a review of the execution of command lines on endpoints is recommended.

Rise of Remote Workers: A Checklist for Securing Your Network – Download Free White paper

Also, Read

Pilot Logins of American and Southwest Airlines Stolen in Data Breach

University of Manchester Cyber Attack – Hackers Stolen Sensitive Data

Hyundai Hacked – Attackers Stole Car Owners’ Personal Details

Website

Latest articles

MirrorFace Attacking Organizations Exploiting Vulnerabilities In Internet-Facing Assets

MirrorFace threat actors have been targeting media, political organizations, and academic institutions since 2022,...

HardBit Ransomware Using Passphrase Protection To Evade Detection

In 2022, HardBit Ransomware emerged as version 4.0. Unlike typical ransomware groups, this ransomware...

New Poco RAT Weaponizing 7zip Files Using Google Drive

The hackers weaponize 7zip files to pass through security measures and deliver malware effectively.These...

New ShadowRoot Ransomware Attacking Business Via Weaponized PDF’s

X-Labs identified basic ransomware targeting Turkish businesses, delivered via PDF attachments in suspicious emails...

Hacktivist Groups Preparing for DDoS Attacks Targeting Paris Olympics

Cyble Research & Intelligence Labs (CRIL) researchers have identified a cyber threat targeting the...

Critical Cellopoint Secure Email Gateway Flaw Let Attackers Execute Arbitrary Code

A critical vulnerability has been discovered in the Cellopoint Secure Email Gateway, identified as...

Singapore Banks to Phase out OTPs for Bank Account Logins Within 3 Months

The Monetary Authority of Singapore (MAS) and The Association of Banks in Singapore (ABS)...
Guru baran
Guru baranhttps://gbhackers.com
Gurubaran is a co-founder of Cyber Security News and GBHackers On Security. He has 10+ years of experience as a Security Consultant, Editor, and Analyst in cybersecurity, technology, and communications.

Free Webinar

Low Rate DDoS Attack

9 of 10 sites on the AppTrana network have faced a DDoS attack in the last 30 days.
Some DDoS attacks could readily be blocked by rate-limiting, IP reputation checks and other basic mitigation methods.
More than 50% of the DDoS attacks are employing botnets to send slow DDoS attacks where millions of IPs are being employed to send one or two requests per minute..
Key takeaways include:

  • The mechanics of a low-DDoS attack
  • Fundamentals of behavioural AI and rate-limiting
  • Surgical mitigation actions to minimize false positives
  • Role of managed services in DDoS monitoring

Related Articles