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    Rewterz Threat Alert – Dexphot – A Polymorphic Threat

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    March 15, 2023
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    Rewterz Threat Alert -New Golang-Based Botnet GoBruteforcer Breaches Web Servers – Active IOCs
    Severity High Analysis Summary According to researchers, a Golang-based botnet named GoBruteforcer has been discovered, which is specifically targeting web servers running FTP, MySQL, phpMyAdmin, and […]
    March 15, 2023
    March 15, 2023
    Rewterz Threat Alert – DarkComet RAT (Remote Access Trojan) – Active IOCs
    Severity High Analysis Summary DarkComet RAT (Remote Administration Tool) is a type of malware that is designed to allow attackers to gain remote access to a […]
    March 15, 2023
    March 15, 2023
    Rewterz Threat Advisory -Multiple Microsoft Windows Products Vulnerabilties
    Severity High Analysis Summary CVE-2023-23410 CVSS:7.8 Microsoft Windows could allow a local authenticated attacker to gain elevated privileges on the system, caused by a flaw in […]

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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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    Read More about XDR

    Platform

    • Rewterz XDR
    • Rewterz Defense
    • Rewterz Threat Intelligence
    Rewterz Threat Alert – Dexphot – A Polymorphic Threat

    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
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    • SIEM Gap Analysis
    • SIEM Optimization
    • SOC Content Pack

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    • Simulated Cyber Attack Exercise
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    March 15, 2023
    March 15, 2023
    Rewterz Threat Alert -New Golang-Based Botnet GoBruteforcer Breaches Web Servers – Active IOCs
    Severity High Analysis Summary According to researchers, a Golang-based botnet named GoBruteforcer has been discovered, which is specifically targeting web servers running FTP, MySQL, phpMyAdmin, and […]
    March 15, 2023
    March 15, 2023
    Rewterz Threat Alert – DarkComet RAT (Remote Access Trojan) – Active IOCs
    Severity High Analysis Summary DarkComet RAT (Remote Administration Tool) is a type of malware that is designed to allow attackers to gain remote access to a […]
    March 15, 2023
    March 15, 2023
    Rewterz Threat Advisory -Multiple Microsoft Windows Products Vulnerabilties
    Severity High Analysis Summary CVE-2023-23410 CVSS:7.8 Microsoft Windows could allow a local authenticated attacker to gain elevated privileges on the system, caused by a flaw in […]

    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 Alert – Mobile Cyberespionage Campaign Distributed Through CallerSpy
December 3, 2019
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Rewterz Threat Alert – Magecart Attacks Hacking Websites to Steal Customer Payment Info
December 4, 2019

Rewterz Threat Alert – Dexphot – A Polymorphic Threat

December 4, 2019

Severity

Medium

Analysis Summary

Microsoft’s Defender ATP Research team detected a campaign they labeled Dexphot. At that point, the Microsoft team began tracking this campaign which turned out to be a polymorphic attack that deployed files that changed every half hour. Dexphot used multiple levels of obfuscation, encryption, and random file names to evade detection. Once a foothold had been gained on a victim system, it then used fileless techniques to further evade detection and forensics. Legitimately running applications were injected with the malware code to disguise the malicious behavior. Services that monitored the malware’s activity and that executed scheduled tasks to re-infect a system were deployed to ensure that the final payload, a cryptominer, was allowed to continue running. As time went by, the malware was upgraded, new running processes were targeted, and efforts to work around defensive measures were added. Except for the installer portion of the infection, all other executables are legitimate applications, such as msiexec.exe, unzip.exe, rundll32.exe, schtasks.exe, and powershell.exe. Applications targeted for its process hollowing technique included svchost.exe, tracert.exe, and setup.exe.

Dexphot attack chain

Impact

Coin miner

Indicators of Compromise

SHA-256

  • 22beffb61cbdc2e0c3eefaf068b498b63a193b239500dab25d03790c467379e3
  • 504cc403e0b83233f8d20c0c86b0611facc040b868964b4afbda3214a2c8e1c5
  • 537d7fe3b426827e40bbdd1d127ddb59effe1e9b3c160804df8922f92e0b366e
  • 65eac7f9b67ff69cefed288f563b4d77917c94c410c6c6c4e4390db66305ca2a
  • 72acaf9ff8a43c68416884a3fff3b23e749b4bb8fb39e16f9976643360ed391f
  • aa5c56fe01af091f07c56ac7cbd240948ea6482b6146e0d3848d450977dff152
  • ba9467e0d63ba65bf10650a3c8d36cd292b3f846983032a44a835e5966bc7e88

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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