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    March 25, 2023
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    Rewterz Threat Alert – GandCrab or .CRAB Ransomware – Active IOCs
    Severity Medium Analysis Summary GandCrab – a ransomware-as-a-service variant – was discovered in early 2018. At least five versions of GandCrab have been created since its […]
    March 25, 2023
    March 25, 2023
    Rewterz Threat Alert – NJRAT – Active IOCs
    Severity Medium Analysis Summary NjRat is a Remote Access Trojan, which is found leveraging Pastebin to deliver a second-stage payload after initial infection. There are multiple […]
    March 24, 2023
    March 24, 2023
    Rewterz Threat Advisory – CVE-2023-20113 – Cisco SD-WAN vManage Software Vulnerability
    Severity Medium Analysis Summary CVE-2023-20113  Cisco SD-WAN vManage Software is vulnerable to cross-site request forgery, caused by improper validation of user-supplied input. By persuading an authenticated […]

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    Annual Threat Intelligence Report 2022
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    Before Rewterz got its start, the market was in dire need of a specialized and dedicated information security company. It was nearly impossible for businesses to find a trustworthy provider that could truly cover all of their bases. We wanted to meet this need, giving companies across the globe a chance to get ahead while knowing that their data is in good hands.

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    Rewterz Threat Alert – DNS Infrastructure Hijacking Campaign

    Managed Security Services

    • Managed Security Monitoring
    • Remote SOC
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    Managed Penetration Testing

    Rewterz penetration testing services help organizations determine if a cyber attacker can gain access to their critical assets while giving them detailed insights of the overall business impact of a cyber attack.

  • Services

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    • Compromise Assessment
    • APT Assessment
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    Transform

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    March 25, 2023
    March 25, 2023
    Rewterz Threat Alert – GandCrab or .CRAB Ransomware – Active IOCs
    Severity Medium Analysis Summary GandCrab – a ransomware-as-a-service variant – was discovered in early 2018. At least five versions of GandCrab have been created since its […]
    March 25, 2023
    March 25, 2023
    Rewterz Threat Alert – NJRAT – Active IOCs
    Severity Medium Analysis Summary NjRat is a Remote Access Trojan, which is found leveraging Pastebin to deliver a second-stage payload after initial infection. There are multiple […]
    March 24, 2023
    March 24, 2023
    Rewterz Threat Advisory – CVE-2023-20113 – Cisco SD-WAN vManage Software Vulnerability
    Severity Medium Analysis Summary CVE-2023-20113  Cisco SD-WAN vManage Software is vulnerable to cross-site request forgery, caused by improper validation of user-supplied input. By persuading an authenticated […]

    Threat Insights

    16
    pdf-file (1)
    Annual Threat Intelligence Report 2022
    • Threat Advisories
    • Monthly Threat Insights
    • Threat Intelligence Reports
  • Why Rewterz?

    About Us

    Before Rewterz got its start, the market was in dire need of a specialized and dedicated information security company. It was nearly impossible for businesses to find a trustworthy provider that could truly cover all of their bases. We wanted to meet this need, giving companies across the globe a chance to get ahead while knowing that their data is in good hands.

    Read More

    play_btn_Smallplay_btn_hover_Small
    leadership

    Our Leadership

    Our leadership team brings together years of knowledge and experience in cybersecurity to drive our company's mission and vision. Our team is passionate about delivering high-quality products and services, leading by example and assisting our clients in securing their organization’s environment.
    help

    CSR

    At Rewterz, we believe that businesses have a responsibility to impact positively and contribute to the well-being of our communities as well as the planet. That's why we are committed to operating in a socially responsible and sustainable way.

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Rewterz
Rewterz Threat Alert – Buhtrap Group uses Zero Day in latest Espionage Campaigns
July 12, 2019
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Rewterz Threat Advisory – CVE-2019-0330 – SAP Diagnostic Agent OS Command Injection Vulnerability
July 15, 2019

Rewterz Threat Alert – DNS Infrastructure Hijacking Campaign

July 15, 2019

Severity

High

Analysis Summary

A new campaign targeting Lebanon and the United Arab Emirates (UAE) affecting .gov domains, as well as a private Lebanese airline company. Based on the research It’s clear that this adversary spent time understanding the victims’ network infrastructure in order to remain under the radar and act as inconspicuous as possible during their attacks.

The attackers’ first attempt to compromise the user involved two malicious websites that mimicked legitimate sites that host job listings:

  • hr-wipro[.]com (with a redirection to wipro.com)
  • hr-suncor[.]com (with a redirection to suncor.com)

These sites hosted a malicious Microsoft Office document: hxxp://hr-suncor[.]com/Suncor_employment_form[.]doc.

The document is a copy of a legitimate file available on the website for Suncor Energy, a Canadian sustainable energy company, and contains a malicious macro.

Upon opening the first Office document, the user receives a message that says “Content Mode Available:”

image3.png

The macros of the analysed samples can be divided into two steps:

When the document is opened, the macro will decode a PE file encoded with base64 and will drop it in %UserProfile%.oracleServices\svshost_serv.doc
When the document is closed, the macro will rename the file “svshost_serv.doc” to “svshost_serv.exe.” Then, the macro creates a scheduled task named “chromium updater v 37.5.0” in order to execute the binary. The scheduled task is executed immediately and repeatedly every minute.
The purpose of these two steps is to avoid sandbox detection.

The payload is executed when Microsoft Office is closed, meaning it requires human interaction to deploy it. The macros, while available through analysis, are also password-protected in Microsoft Word to stop the victim from exploring the macro code via Microsoft Office.

Additionally, the macro uses classical string obfuscation in order to avoid strings detection.

Impact

Alters DNS records

Indicators of Compromise

IP(s) / Hostname(s)

  • 185[.].20[.].184[.].138
  • 185[.].20[.].187[.].8
  • 185[.].161[.].211[.].72

URLs

  • hr-wipro[.]com
  • hr-suncor[.]com
  • 0ffice36o[.]com

Malware Hash (MD5/SHA1/SH256)

  • 9ea577a4b3faaf04a3bddbfcb934c9752bed0d0fc579f2152751c5f6923f7e14
  • 15fe5dbcd31be15f98aa9ba18755ee6264a26f5ea0877730b00ca0646d0f25fa
  • 2010f38ef300be4349e7bc287e720b1ecec678cacbf0ea0556bcf765f6e073ec
  • 82285b6743cc5e3545d8e67740a4d04c5aed138d9f31d7c16bd11188a2042969
  • 45a9edb24d4174592c69d9d37a534a518fbe2a88d3817fc0cc739e455883b8ff

Remediation

  • Update the passwords for all accounts that can change organizations’ DNS records.
  • Implement multifactor authentication on domain registrar accounts, or on other systems used to modify DNS records.

Platform

  • Rewterz XDR
  • Rewterz Defense
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Managed Security Services

  • Managed Security Monitoring
  • Remote SOC
  • Onsite SOC
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Assess

  • Compromise Assessment
  • APT Assessment
  • Penetration Testing
  • Architecture Design & Review
  • Red Team Assessment
  • Purple Team Assessment
  • Social Engineering
  • Source Code Review

Transform

  • SOC Consultancy
  • SOC Maturity Assessment
  • SOC Model Evaluation
  • SOC Gap Analysis
  • SIEM Gap Analysis
  • SIEM Optimization
  • SOC Content Pack

Train

  • Simulated Cyber Attack Exercise
  • Tabletop Exercise
  • Security Awareness and Training

Respond

  • Incident Analysis
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Threat Insights

  • Threat Advisories
  • Monthly Threat Insights
  • Threat Intelligence Reports

Resources

  • Blog
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Connect With Us

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