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Rewterz Threat Alert – Lazarus JavaScript Skimming Campaign
May 16, 2020
Rewterz Threat Advisory – CVE-2020-11973 – Apache Camel Netty code execution
May 18, 2020

Rewterz Threat Alert – Rhino Ransomware

May 18, 2020

Severity

High

Analysis Summary

Rhino Ransomware is one of the latest in ransomware analyzed by researchers. The ransomware carries several capabilities including, disabling services, hindering backup recovery, deleting shadow copies, and persistence. The first step of infection disables several Windows Security and Defender services, as well as Windows Update service, and error reporting. Additionally, the ransomware attempts to stop Microsoft Exchange, sqlserver, and sqlwriter. Stopping these services leads the researchers to believe the targeted victims could be businesses. The next step is the deleting of shadow copies and the backup catalog, as well as Windows Recovery Mode. Persistence is achieved through a registry entry and copying itself to the %AppData% directory as mshtop32bit.exe. After file encryption, a file marker “Marvel01 is added. An email address is included in the ransom email note. Excluded file types are .EXE, .SYS, .LNK, .DLL, .MSI, and the ransomware’s notes.

Impact

File encryption

Indicators of Compromise

MD5

40583ed8bee94ff6b29a35e941089d54

SHA-256

8af0d99cef6fb1d040083ff8934f9a7ce01f358ca796b3c60087a2ebf6335c83

SHA1

1402b9c544092ee911d0638c0dfde51790a6708c

Remediation

Block all threat indicators at your respective controls.
Search for IOCs in your respective environment.

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    • Assess
      • Compromise Assessment
      • APT Assessment
      • Penetration Testing
      • Secure Architecture Design & Review
      • Red Team Assessment
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      • Social Engineering
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    • Respond
      • Incident Response
      • Incident Analysis
  • Transform
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    •     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
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      • 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
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