Cyber Security News

Hackers Using Remote Admin Tools To Compromise Organizations With Ransomware

Cybercriminals behind the AvosLocker ransomware attack employed a tactic of infecting organizations through Open-Source Remote Administration Tools.

This method allowed the malware to spread rapidly, potentially compromising sensitive data and systems across the affected networks.

The FBI found a new version of AvosLocker in May of 2023 during their investigations.

AvosLocker Ransomware

AvosLocker is a RaaS (ransomware as a service) group that emerged in the middle of 2021. It has since gained notoriety for attacks on U.S. financial institutions, vital factories, and government buildings, all considered part of the country’s “critical infrastructure.”

Members of the AvosLocker group infiltrate corporate networks by masquerading as genuine software installers or by employing freely available remote system administration tools.

Affiliates of AvosLocker engage in extortion by threatening to leak or publicly disclose the stolen information obtained through data exfiltration.


Deploy Advanced AI-Powered Email Security Solution

Implementing AI-Powered Email security solutions “Trustifi” can secure your business from today’s most dangerous email threats, such as Email Tracking, Blocking, Modifying, Phishing, Account Take Over, Business Email Compromise, Malware & Ransomware

AvosLocker Affiliates:

  • Remote system administration tools—Splashtop Streamer, Tactical RMM, PuTTy, AnyDesk, PDQ Deploy, and Atera Agent—as backdoor access vectors [T1133].
  • Scripts to execute legitimate native Windows tools [T1047], such as PsExec and Nltest.
  • Open-source networking tunneling tools [T1572] Ligolo[1] and Chisel[2].
  • Cobalt Strike and Sliver[3] for command and control (C2).
  • Lazagne and Mimikatz for harvesting credentials [T1555].
  • FileZilla and Rclone for data exfiltration.
  • Notepad++, RDP Scanner, and 7zip

The FBI developed the following YARA rule to detect the signature of a file known to be enabling malware, based on an analysis by a sophisticated digital forensics group.

NetMonitor.exe is a malware masquerading as a legitimate process and it has the appearance of a genuine network monitoring tool.

The network will get a ping from this persistence utility every five minutes. 

The software for NetMonitor is set up to talk to a specific IP address that acts as its command server through TCP port 443.

During an attack, the communication between NetMonitor and the command server is protected, and NetMonitor works like a reverse facilitator that lets attackers connect to the tool from outside the victim’s network.

The FBI and CISA suggest that companies take steps to protect their computer systems from AvosLocker ransomware attacks. This will help to prevent hackers from stealing important information and causing problems.

Protect yourself from vulnerabilities using Patch Manager Plus to patch over 850 third-party applications quickly. Take advantage of the free trial to ensure 100% security.


Recent Posts

Sleepy Pickle Exploit Let Attackers Exploit ML Models And Attack End-Users

Hackers are targeting, attacking, and exploiting ML models. They want to hack into these systems to steal sensitive data, interrupt…

2 days ago

SolarWinds Serv-U Vulnerability Let Attackers Access sensitive files

SolarWinds released a security advisory for addressing a Directory Traversal vulnerability which allows a threat actor to read sensitive files…

2 days ago

Smishing Triad Hackers Attacking Online Banking, E-Commerce AND Payment Systems Customers

Hackers often attack online banking platforms, e-commerce portals, and payment systems for illicit purposes. Resecurity researchers have recently revealed that…

2 days ago

Threat Actor Claiming Leak Of 5 Million Ecuador’s Citizen Database

A threat actor has claimed responsibility for leaking the personal data of 5 million Ecuadorian citizens. The announcement was made…

2 days ago

Ascension Hack Caused By an Employee Who Downloaded a Malicious File

Ascension, a leading healthcare provider, has made significant strides in its investigation and recovery efforts following a recent cybersecurity breach.…

2 days ago

AWS Announced Malware Detection Tool For S3 Buckets

Amazon Web Services (AWS) has announced the general availability of Amazon GuardDuty Malware Protection for Amazon Simple Storage Service (Amazon…

2 days ago