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Rewterz Threat Advisory – CVE-2021-22101 – VMware Tanzu Application Service
November 11, 2021
Rewterz Threat Alert – NJRAT – Active IOCs
November 11, 2021

Rewterz Threat Alert – Cobalt Strike Malware – Active IOCs

November 11, 2021

Severity

Medium

Analysis Summary

Cobalt Strike is a paid penetration testing product that allows an attacker to deploy an agent named ‘Beacon’ on the victim machine. Beacon includes a wealth of functionality to the attacker, including, but not limited to command execution, keylogging, file transfer, SOCKS proxying, privilege escalation, mimikatz, port scanning, and lateral movement. Beacon is in-memory/file-less, in that it consists of stageless or multi-stage shellcode that once loaded by exploiting a vulnerability or executing a shellcode loader, will reflectively load itself into the memory of a process without touching the disk. It supports C2 and staging over HTTP, HTTPS, DNS, SMB named pipes as well as forward and reverse TCP; Beacons can be daisy-chained. Cobalt Strike comes with a toolkit for developing shellcode loaders, called Artifact Kit.

Impact

  • Data Exfiltration
  • Information Theft

Indicators of Compromise

IP

  • 89[.]163[.]253[.]100
  • 5[.]104[.]110[.]248
  • 91[.]193[.]16[.]144
  • 162[.]33[.]179[.]128
  • 192[.]46[.]217[.]247
  • 206[.]221[.]176[.]225
  • 104[.]194[.]11[.]51
  • 151[.]236[.]23[.]138

URL

  • http[:]//kertisbank[.]com/
  • http[:]//jobefur[.]com/
  • http[:]//bobyfrank[.]com/
  • http[:]//gostnamara[.]com/
  • http[:]//svedroom[.]com/
  • http[:]//modasum[.]com/
  • http[:]//sujaxa[.]com/
  • http[:]//grupostefano[.]com/

Remediation

  • Block all threat indicators at your respective controls.
  • Search for IOCs in your environment.
  • Services
    • Assess
      • 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
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    • Contact
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