Picus Threat Library Updated for Vulnerability Exploitation Attacks Leveraged by Mirai Botnet Malware

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Picus Labs has updated the Picus Threat Library with new vulnerability exploitation attacks leveraged by Mirai malware which has been active throughout 2016. Mirai is a botnet malware that transforms Linux-based networked devices into remotely managed bots that can be used in large-scale network attacks as part of a botnet. Its main targets are IoT devices such as IP cameras, routers, switches, and network security devices such as SSL VPN solutions. Mirai variants are designed for different CPU architectures, such as x86, ARM, MIPS, PowerPC and SPARC. 

New Mirai Campaign Targeting Network Devices

In the last month, Unit 42 researchers discovered attacks that exploited a variety of vulnerabilities given in the following table:

Vulnerability

Vulnerability Type

Affected Product

CVSS 3.1 Score

Visualdoor

Remote Command Injection

SonicWall “Virtual Office” SSL-VPN

9.8 Critical

CVE-2020-25506

Remote Command Injection

D-Link DNS-320 Firewall

9.8 Critical

CVE-2021-27561

Remote Code Execution 

Yealink Device Management 

9.8 Critical

CVE-2021-22502

Remote Code Execution 

Micro Focus Operation Bridge Reporter (OBR)

9.8 Critical

CVE-2020-26919

Remote Code Execution 

NETGEAR ProSafe JGS516PE Switch

9.8 Critical

Upon successful exploitation of one of these vulnerabilities, the attackers attempt to download a malicious shell script by invoking the wget utility on the target device. The downloaded shell script then downloads multiple Mirai binaries that have been compiled for various architectures and runs them one by one.

Picus Labs Red Team examined these vulnerabilities and added the following threats to Picus Threat Library:

Picus ID

Threat Name

CVE

373908

SonicWall SSL VPN Server Remote Code Execution Vulnerability

 

470582

D-Link DNS320 Firewall Remote Code Execution (RCE) Vulnerability Variant-1

CVE-2020-25506

604066

Yealink Device Management Remote Code Execution (RCE) Vulnerability Variant-1

CVE-2021-27561

490108

Micro Focus Operations Bridge Manager OS Command Injection Variant-2

CVE-2021-22502

314732

Micro Focus Operations Bridge Manager OS Command Injection Variant-1

CVE-2021-22502

543188

Netgear ProSAFE Plus Remote Code Execution (RCE) Vulnerability Variant-1

CVE-2020-26919

Other Threats of Mirai in Picus Threat Library

Picus Threat Library consists of 31 threats of the MuddyWater threat group, including:

  • Mirai Botnet .ELF File Download for ARM Architecture
  • Mirai Botnet .ELF File Download for Power PC Architecture
  • Mirai Botnet .ELF File Download for MIPS Architecture
  • Mirai Botnet .ELF File Download for SPARC Architecture 
  • Mirai Botnet .ELF File Download for Intel 80386 Architecture
  • Mirai Botnet .EXE File Download for Windows Operating System

References

[1] https://unit42.paloaltonetworks.com/mirai-variant-iot-vulnerabilities/

 

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