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Rewterz Threat Alert – TFlower Ransomware Targeting Businesses
September 18, 2019
Rewterz Threat Alert – Magecart Skimming Attack Targets Mobile Users
September 19, 2019

Rewterz Threat ALert – WannaCry Continues to Target Users

September 19, 2019

Severity

Medium

Analysis Summary

WannaCry’s rapid spread, enabled by its implementation of a Windows vulnerability stolen from an intelligence agency, was suddenly halted when security researchers registered an internet domain name embedded in the code – a routine research procedure that, inadvertently, tripped a “kill switch” subroutine in the malware, causing it to stop infecting computers. A small number of variants released in the following days, using new kill switch domains, were shut down using the same method.

By the time the kill switch domain had any effect, the malware had already wrought a lot of destruction. But the kill switch, surprisingly, didn’t mean an end to WannaCry, even though WannaCry was updated and re-released only twice a few days after the first infection. In fact, WannaCry detection appear to be at an all-time high, surpassing the number of detection of older worm malware such as Conficker. The malware continues to infect computers worldwide.

WannaCry ransom note

Impact

File encryption

Indicators of Compromise

Malware Hash (MD5/SHA1/SH256)

6e34070d194e33e9eef908f71e6cc597d3283f5d

Remediation

  • Block all threat indicators at your respective controls.
  • Always be suspicious about emails sent by unknown senders.
  • Never click on the link/attachments sent by unknown senders.

  • Services
    • Asses
      • Compromise Assessment
      • APT Assessment
      • Penetration Testing
      • Secure Architecture Design & Review
      • Red Team Assessment
      • Purple Team Assessment
      • Social Engineering
      • Source Code Review
    • Respond
      • Incident Response
      • Incident Analysis
  • Transform
    • SOC Consultancy
    •     SOC Maturity Assessment
    •     SOC Model Evaluation
    •     SOC Gap Analysis
    •     SIEM Gap Analysis
    •     SIEM Optimization
    •     SOC Content Pack
  • Train
    • Security Awareness and Training
    • Tabletop Exercise
    • Simulated Cyber Attack Exercises
  • Managed Security
    • Managed Security Monitoring
      • Remote SOC
      • Onsite SOC
      • Hybrid SOC
    • Managed Security Services
      • Managed Detection and Response
      • Managed Endpoint Detection and Response
      • Managed Threat Intelligence
      • Managed Threat Hunting
      • Managed Risk-Based SOAR
      • Managed Penetration Testing
  • Solutions
  • Resources
    • Blog
    • Threat Advisory
  • Company
    • About Us
    • Careers
    • Contact
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