Wednesday, April 24, 2024

Hackers Exploit Critical Oracle WebLogic Server Vulnerability by Hiding Malware in Certificate Files(.cer)

Hackers abuse Oracle WebLogic Server Vulnerability CVE-2019-2725 to deliver Monero Miner. The vulnerability is easily exploitable, any unauthenticated attacker with HTTP access to the server can attack without authentication.

Trend Micro observed a new cryptocurrency-mining activity involving the vulnerability and to hide the malicious code they used certificate files.

Malware Infection

Malware exploits CVE-2019-2725 to execute a PowerShell command to download the malicious code obfuscated in the .cer file. The PowerShell scripts download the encoded certificate file from the attacker’s server.

To decode the certificate file CertUtil is used, CertUtil is a command-line program that is installed along with Certificate Services.

Infection Chain

The extracted file update.ps1 is executed using PowerShell command, and the downloaded certificate is deleted using command.

“When we downloaded the certificate file, we noticed that it looked like a normal Privacy-Enhanced Mail (PEM) format certificate. However, upon decoding the base64 content, we found that, instead of the commonly used X.509 TLS file format, it comes in the form of the PS command,” reads Trend Micro report.

Last month another campaign leveraged the vulnerability to download Sodinokibi ransomware and to encrypt the customer’s systems.

It is recommended to patch the CVE-2019-2725 vulnerability; you can find the security alert published by Oracle and the Patch Availability here.

Indicators of Compromise

SHA-256
e4bc026aec8a76b887a8fc48726b9c48540fc2aa76eb8e61893da2ee6df6ab3a
4b9842b6be35665174c78c3e4063c645bd6e10eb333f68e4c7840fe823647bdf
c30f42e6f638f3e8218caf73c2190d2a521304431994fd6efeef523cfbaa5e81
3a567b7985b2da76db5e5a1d5554f7c13f375d88a27d6e6d108ad79e797adc9

URLs
hxxp://139[.]180[.]199[.]167:1012/clean[.]bat
hxxp://139[.]180[.]199[.]167:1012/config[.]json
hxxp://139[.]180[.]199[.]167:1012/networkservice[.]exe
hxxp://139[.]180[.]199[.]167:1012/sysguard[.]exe
hxxp://139[.]180[.]199[.]167:1012/sysupdate[.]exe
hxxp://139[.]180[.]199[.]167:1012/update[.]ps1
hxxp://45.32.28.187:1012
hxxp://45.32.28.187:1012/cert.cer
hxxps://pixeldrain[.]com/api/file/bg2Fh-d_
hxxps://pixeldrain[.]com/api/file/cGsOoTyb
hxxps://pixeldrain[.]com/api/file/cGsOoTyb/wujnEh-n1
hxxps://pixeldrain[.]com/api/file/DF1zsieq1
hxxps://pixeldrain[.]com/api/file/TyodGuTm

You can follow us on LinkedinTwitterFacebook for daily Cybersecurity updates also you can take the Best Cybersecurity courses online to keep your self-updated.

Website

Latest articles

Phishing Attacks Rise By 58% As The Attackers Leverage AI Tools

AI-powered generative tools have supercharged phishing threats, so even newbie attackers can effortlessly create...

Multiple MySQL2 Flaw Let Attackers Arbitrary Code Remotely

The widely used MySQL2 has been discovered to have three critical vulnerabilities: remote Code...

CoralRaider Hacker Evade Antivirus Detections Using Malicious LNK File

This campaign is observed to be targeting multiple countries, including the U.S., Nigeria, Germany,...

Spyroid RAT Attacking Android Users to Steal Confidential Data

A new type of Remote Access Trojan (RAT) named Spyroid has been identified.This...

Researchers Uncover that UK.GOV Websites Sending Data to Chinese Ad Vendor Analysts

Analysts from Silent Push, a data analytics firm, have uncovered several UK government websites...

Ransomware Victims Who Opt To Pay Ransom Hits Record Low

Law enforcement operations disrupted BlackCat and LockBit RaaS operations, including sanctions on LockBit members...

IBM Nearing Talks to Acquire Cloud-software Provider HashiCorp

IBM is reportedly close to finalizing negotiations to acquire HashiCorp, a prominent cloud infrastructure...
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.

WAAP/WAF ROI Analysis

Mastering WAAP/WAF ROI Analysis

As the importance of compliance and safeguarding critical websites and APIs grows, Web Application and API Protection (WAAP) solutions play an integral role.
Key takeaways include:

  • Pricing models
  • Cost Estimation
  • ROI Calculation

Related Articles