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Rewterz Threat Alert – Spam Campaign Abuses PHP Functions for Persistence, Uses Compromised Devices for Evasion and Intrusion
September 6, 2019
Rewterz Threat Advisory -Delta Electronics TPEditor Multiple Vulnerabilities
September 11, 2019

Rewterz Threat Alert – Winnti Malware 4.0 Exploits Vulnerabilities in Linux and Windows

September 6, 2019

Severity

Medium

Analysis Summary

The Winnti Malware is being used by APT groups such as the Chinese APT41 to launch cyber attacks. Winnti malware is installed manually with stolen privileged credentials or by exploiting system vulnerabilities since it requires an AES key string to decrypt a DAT file.

The Winnti 4.0 variants require a command line structured in the manner listed below, in order to fully execute.

loader_path AES_key_string DAT_file_path

This Linux variant of Winnti 4.0 (works for windows too) allows the operators to initiate a connection directly to an infected host, without requiring a connection to a control server.

This toolkit enables operators to have expertise in compromising Windows-based environments, now extending to Linux as well. Indicators of Compromise are given.

Impact

  • Privilege Escalation
  • Security Bypass
  • Code Execution

Indicators of Compromise

Malware Hash (MD5/SHA1/SH256)

  • 794e127d627b3af9015396810a35af1c
  • 5ebf39d614c22e750bb8dbfa3bcb600756dd3b36929755db9b577d2b653cd2d1
  • 355d1ada949d28e535f707b82a31fce8687154bfc5ab76e9f83dd6a351d76b9f
  • ce9baade675cae3d179cb703c87422fe
  • fe2b6c42b3a354c42c7d9c5b04bcaae914ff03ba5792835cb1f35aa6eff2cdf7
  • aaf8f7895c5ffbb855254d322f114527
  • 31befd3393750a5a3b48ab05e43d9affb47e648b40903ac014bcec68cc087cee
  • 52449d12ae6e5af5ae22150c740e262c
  • a259a52d53e6d7c1bf864446a380966db82370009a8db4b08cfe09abae77d2df
  • 9864437fc844d928a67e8c6ecff2edd6
  • 4b0d86ba4f5e3b515f2a1c68e8798e40e080ecf7bccc502e0b27445b404f7886
  • dd34560ea3e6272663c4c78ad1e2c8b4
  • bf0d37fffa1de72ae4dec8228d5e3c8adafc59b969449ebf924818cd33f8b4a3
  • 22a59a227bddcb158403a023fe2630ef
  • ae9a4d32abc7830393c5800c07bcfa4a7d1e5701370d9440377a5911c9fb3fb9
  • 7c76f5f65f17329bf1468e6b06631bd7
  • d5d24f9bd269b0564f57bec005dbc51688c9a5d2f4eb8f2e8b61b720424ce6bf
  • 79939742f6efd865c112f764ebdaf7c5
  • 13aed842a6b43e61fd8e076cdfa9d96ec9ad917e073740bbd99ccb395eb3c9fe
  • 048b0012d4a389b5489e0e4ee4a5b615
  • d16e01dbb894a40ff0c8b3f6b25a41d190db03c15c432ac50c3784a9880d376e
  • 2b87dd7984c772fb7c7b262016f07665
  • ddda469518921837d51d106ff2e2b243ade8f8ef02845dee0d77d1c348547bd5
  • 0a3edfa038ae8ba96cfe0928f2bc2f05
  • b81bd877a2da4598f44cf1c06e79fee33f8f506060b2d67e869a35d5f45cc915
  • 476a7a4c04f55d2ce8fe65d3728a0162
  • fb2478039c371f0fd8fbef217867ae77cdad7fb186e133723503cd70bb6f2a3e
  • 8593f147507b700ef0722a390b264757
  • 0fdcbd59d6ad41dda9ae8bab8fad9d49b1357282027e333f6894c9a92d0333b3
  • da3b64ec6468a4ec56f977afb89661b1
  • b49f52c69badd3ebca9aee984805d93dcb24a6863d752d99d1e62d6bf7ab3f77
  • 225e239909a48c291a178b0ef0ce3aa4
  • 64a08eb97c7e0d8c34dfbe368892c07b78a4a3f1f271824854f5ea99097fcf2f
  • df67017e9c102b23b9da2db008aff7a1
  • 4340186d5609a903d6148c39b4944a2c18b85729035133f4a3b7b7a0eb1ed1ee
  • 195dd09a56e288d13c0c46ff117a5332
  • fc325e6655134fbb8ffac743db626938e45a99103035e16618ab967958d32421
  • 9366e52e76435dc91dd03af8c234ea0b

Remediation

  • Block the threat indicators at respective controls.
  • Keep Windows and Linux updated to latest patched versions against known vulnerabilities.
  • Keep all software updated and patched.
  • 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
    • Careers
    • Contact
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