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    Read More about XDR

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    • Rewterz XDR
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    Rewterz Threat Alert – A New Multiplatform Backdoor Targeting Linux

    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.

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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
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    • Simulated Cyber Attack Exercise
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    March 22, 2023
    March 22, 2023
    Rewterz Threat Alert – Mekotio Banking Trojan aka Melcoz – Active IOCs
    Severity Medium Analysis Summary Mekotio is a banking trojan that targets users in Latin America and Europe. It is primarily distributed via phishing emails and infected […]
    March 22, 2023
    March 22, 2023
    Rewterz Threat Update – Cyber Threat Intelligence Advisory – 23rd March Pakistan Day
    Analysis Summary Overview – 23rd Mar – A Big Day –  As we approach the 23rd of March, Pakistan Day, organizations and individuals should be aware […]
    March 22, 2023
    March 22, 2023
    Rewterz Threat Advisory -Multiple Jenkins Products Vulnerabilities
    Severity High Analysis Summary CVE-2023-28684 CVSS:7.1 Jenkins remote-jobs-view-plugin Plugin could allow a remote authenticated attacker to obtain sensitive information, caused by improper handling of XML external […]

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    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.

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    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.
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    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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logo_SVG-01
  • Platform
    xdrLogo
    center_new
    Read More about XDR

    Platform

    • Rewterz XDR
    • Rewterz Defense
    • Rewterz Threat Intelligence
    Rewterz Threat Alert – A New Multiplatform Backdoor Targeting Linux

    Managed Security Services

    • Managed Security Monitoring
    • Remote SOC
    • Onsite SOC
    • Hybrid SOC

    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

    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
    • Incident Response
  • Solutions
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    Resources

    • Blog
    • Press Releases
    March 22, 2023
    March 22, 2023
    Rewterz Threat Alert – Mekotio Banking Trojan aka Melcoz – Active IOCs
    Severity Medium Analysis Summary Mekotio is a banking trojan that targets users in Latin America and Europe. It is primarily distributed via phishing emails and infected […]
    March 22, 2023
    March 22, 2023
    Rewterz Threat Update – Cyber Threat Intelligence Advisory – 23rd March Pakistan Day
    Analysis Summary Overview – 23rd Mar – A Big Day –  As we approach the 23rd of March, Pakistan Day, organizations and individuals should be aware […]
    March 22, 2023
    March 22, 2023
    Rewterz Threat Advisory -Multiple Jenkins Products Vulnerabilities
    Severity High Analysis Summary CVE-2023-28684 CVSS:7.1 Jenkins remote-jobs-view-plugin Plugin could allow a remote authenticated attacker to obtain sensitive information, caused by improper handling of XML external […]

    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.

    Connect with Us

    • Contact
    • Careers
Get in Touch
Rewterz
Rewterz Threat Advisory – CVE-2019-13945 – ICS: Undocumented access feature in Siemens SIMATIC PLCs Code Execution Vulnerability
November 18, 2019
Rewterz
Rewterz Threat Alert – Buran Ransomware Infects PCs via Microsoft Excel Web Queries
November 19, 2019

Rewterz Threat Alert – A New Multiplatform Backdoor Targeting Linux

November 19, 2019

Severity

Medium

Analysis Summary

A New Multiplatform Backdoor targeting Linux which does not have any known connections to other threat groups.

Technical Analysis

The Linux binary is a statically linked ELF file, while the Windows binary is a dynamically linked PE file.

Both instances of this malware are practically identical in terms of overall functionality, with minor implementation differences. However, if we pay close attention to each instance we can draw some conclusions regarding the nature of the authors.

Both malware instances share the same protocol to communicate with the same CNC server. However, these instances have different delivery vectors:

2019 11 12 000451 807x440 scrot

Backdoor Analysis

The Windows variant of this malware does not represent a complex threat in terms of Windows malware. Conversely, the Linux variant shows more sophistication in regards to the implementation details used to replicate the same functionality.

2019 11 12 110915 702x99 scrot

This indicates information regarding the malware authors’ development environment preference.

The main function is not obfuscated and appears to be straightforward in logic. In the Windows variant we can see how some strings are decoded in the beginning of the function.

2019 11 12 111229 712x581 scrot
2019 11 12 112102 603x541 scrot

Impact

  • Arbitrary execution of shell commands
  • Arbitrary binary execution

Indicators of Compromise

IP

  • 185[.]198[.]56[.]53
  • 193[.]29[.]15[.]147

SHA-256

  • 5d51dbf649d34cd6927efdb6ef082f27a6ccb25a92e892800c583a881bbf9415
  • 907e1dfde652b17338d307b6a13a5af7a8f6ced93a7a71f7f65d40123b93f2b8

Remediation

  • Block all threat indicators at your respective controls.
  • Always be suspicious about emails sent by unknown senders.
  • Never click on the links/attachments sent by unknown senders.

Platform

  • Rewterz XDR
  • Rewterz Defense
  • Rewterz Threat Intelligence

Managed Security Services

  • Managed Security Monitoring
  • Remote SOC
  • Onsite SOC
  • Hybrid SOC

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
  • Incident Response

Threat Insights

  • Threat Advisories
  • Monthly Threat Insights
  • Threat Intelligence Reports

Resources

  • Blog
  • Press Releases

Connect With Us

  • Contact
  • Careers
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