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Rewterz Threat Alert – Increased Office 365 Phishing Campaigns Attacks Related to COVID-19
June 23, 2020
Rewterz Threat Advisory – CVE-2020-9665 – Adobe Magento Commerce and Open Source cross-site scripting
June 24, 2020

Rewterz Threat Alert – Vendetta Group Targeting Users with Phishing Campaign

June 23, 2020

Severity

Medium

Analysis Summary

Emerging during the pandemic, a new threat group is targeting Taiwanese users with COVID-19 themed phishing campaigns. The use of COVID-19 themes as a lure has been a consistent tactic in their campaigns since their appearance. The most recent campaign indicates a clear intent to victimize users in Taiwan based on the content and language. The email claims that the attachment contains information regarding making an appointment for testing at the Taiwan CDC. The researchers note the email was high quality and indicated sophisticated targeting, unlike most phishing emails which contain grammatical mistakes or appear to be fake. Attached is an ISO containing a packed .NET executable identified as RoboSki. RoboSki, upon execution, runs a DLL file in memory that extracts shell code from an embedded PNG image. The shell code, in turn, drops the next payload in memory, the ReZer0 malware. This kicks off a chain of payload executions in memory leading to the final payload, which in this campaign is the Nanocore RAT.

Impact

  • Credential theft
  • Exposure of sensitive data 

Indicators of Compromise

MD5

  • 0f3feea28e99381970d9f50a49d58a74
  • 4903d9ffb602801ed30ca75275773b4a
  • e468ae6521717f48fb0469c0d34c7b84
  • 0362f695e45afe0c5887851ea87d46c7

SHA-256

  • 080ff06496d8b6b5e6307059e378ed7052e381a6f130d89385c778edf32ae996
  • 9fbb3df3c9b58626be3f9e66e8b4abd811a8069839374ade15cc405eb3b4d816
  • 0aa87ed22e193e1c6aa9944cf1b9e88ec4ae6a5b3f975e3fb72c0f5b06b864f2
  • 51B0165FBA9CF8E0B7BFEBDC33E083ECC44D37CDBB15B5159B88B71E52B0255B
  • d5d3cf535b3313077956d5708225cf8029b039ed0652ee670ce25ea80d2b00c0

SHA1

  • fcd655242f18ec6adc00d57424e62acee797d38d
  • 1e92ac2ff286e30bd2b7256ab2ac5b3177201a02
  • 229dc04d91d3756a9ba7d59125cd32f748cc92a9
  • 3aea3327ee6f8ce0d28f19cba9a09d16c3f694d2

Remediation

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