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    Rewterz Threat ALert – Trickbot Using Google Docs to Bypass Email Gateways

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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 […]
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    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 […]
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    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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    Rewterz Threat ALert – Trickbot Using Google Docs to Bypass Email Gateways

    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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    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.

    Connect with Us

    • Contact
    • Careers
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Rewterz Threat Alert – Network Routers Hit with Glupteba Campaign
September 5, 2019

Rewterz Threat ALert – Trickbot Using Google Docs to Bypass Email Gateways

September 5, 2019

Severity

Medium

Analysis Summary

A phishing campaign using Google Docs links to evade email gateway detection and distribute TrickBot. The emails are sent via the legitimate Google Docs services, which means the content is a legitimate shared file notification from Google and contains only Google links. The message from the sender claims to be regarding a previously sent document that needs to be viewed. If a user falls for the lure, they are directed to a Google Docs file hosted on the genuine Google service. The content of the document is a fake 404 error and a link to an executable hosted on Google Drive. The file masquerades as a PDF in order to trick a user into opening it. If it is opened, it first creates a copy of itself in the ProgramData folder and an additional copy in a subfolder of the User AppData directory, which also contains the TrickBot configuration. Persistence is established via a scheduled task that executes the payload every 11 minutes. Finally, it hollows out svchost.exe to inject the malicious code. Additional svchost processes are continually spawned to run various TrickBot modules.

Impact

Security Bypass

Indicators of Compromise

IP(s) / Hostname(s)

  • 107[.]181[.]175[.]122
  • 181[.]129[.]93[.]226
  • 186[.]47[.]40[.]234
  • 190[.]152[.]4[.]210
  • 198[.]27[.]74[.]146
  • 200[.]119[.]45[.]140
  • 79[.]143[.]31[.]94


URLs

  • https[:]//docs[.]google[.]com/uc?id=112QLCdDtd4y-mAzr8hobCs0TP5mQmKfL
  • https[:]//jaquetas01[.]cordenadorltda[.]org
  • https[:]//services[.]halapar[.]org
  • https[:]//docs[.]google[.]com/document/d/1fgSfd4DwReVKbcLI3ISO2jhX1Yn8WOqbXnmU_bg00_A/edit?usp=sharing_eip&ts=5d5accb1

Malware Hash (MD5/SHA1/SH256)

  • ab2a8fc10e8c1a39ae816734db9480de
  • 20328b1f169b1edeef38853dafbbacfdac53c66f7f1dd62f387091bedebfd497

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.

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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