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Rewterz Threat Alert – Phishing Emails Are Using SharePoint to Attack Banks
September 6, 2019
Rewterz Threat Alert – Winnti Malware 4.0 Exploits Vulnerabilities in Linux and Windows
September 6, 2019

Rewterz Threat Alert – Spam Campaign Abuses PHP Functions for Persistence, Uses Compromised Devices for Evasion and Intrusion

September 6, 2019

Severity

Medium

Analysis Summary

A spam campaign that uses compromised devices to attack vulnerable web servers. After brute-forcing devices with weak access credentials, the attackers use them as proxies to forward a base64-encoded PHP script to web servers. The script sends an email with an embedded link to a scam site to specific email addresses.

Impact

Credential theft

Indicators of Compromise

URLs

  • http[:]//tiny[.]cc/oyxbbz
  • http[:]//tiny[.]cc/ekubbz
  • http[:]//pkusk[.]com/idkadmin/ckeditor/plugins/link/images/hidpi/libraries/merkzettel/shipping_help/wfidecademail[.]php/zftv/ayeq/?wait=ktw1m012zhw0
  • https[:]//cryptonation[.]thesecuretrack[.]pro/en/crypto-nation
  • http[:]//guidetti[.]se/wp-snapshots/tmp/handleoptin/countries/encuesta/sharethis/register/commentsmiss/busqueda[.]php/vtsk/sdzh/?higher=1es0xze1hzcxx20
  • https[:]//clck[.]ru/HfCrK
  • http[:]//bvsa[.]in/publicdeliver/rmareturns[.]php/kbrt/anpx/?spent=1df0b12ububx0f
  • https[:]//clck[.]ru/HfCYQ
  • https[:]//clck[.]ru/HfBwo
  • http[:]//sweetheart-exhibition[.]com/upfiles/gzip_loader[.]php/tka/yxrbh/?8k8s8pu0z2


Malware Hash (MD5/SHA1/SH256)

  • 5b6875ebd80c4e922b340aaf22831b58a16dc696

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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