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    Rewterz Threat Alert –  Phobos Ransomware Threat Indicators

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    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 19, 2023
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    Rewterz Threat Advisory – CVE-2022-42436 – IBM MQ Vulnerability
    Severity Medium Analysis Summary CVE-2022-42436 IBM MQ Managed File Transfer could allow a local user to obtain sensitive information from diagnostic files. Impact Indicators Of Compromise […]
    March 19, 2023
    March 19, 2023
    Rewterz Threat Advisory – ICS: Rockwell Automation Modbus TCP AOI Server Vulnerability
    Severity Medium Analysis Summary CVE-2023-0027 Rockwell Automation Modbus TCP AOI Server could allow a remote attacker to obtain sensitive information. By sending a malformed message, an […]
    March 17, 2023
    March 17, 2023
    Rewterz Threat Advisory – ICS: Multiple Schneider Electric IGSS Vulnerabilities
    Severity High Analysis Summary CVE-2023-27984 CVSS:7.8 Schneider Electric IGSS could allow a remote attacker to execute arbitrary code on the system, caused by improper input validation […]

    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 Threat Alert – Phobos Ransomware Threat Indicators

July 26, 2019

Severity

High

Analysis Summary

Analysis Summary
Phobos ransomware appeared at the beginning of 2019. It has been noted that this new strain of ransomware is strongly based on the previously known family: Dharma (a.k.a. CrySis), and probably distributed by the same group as Dharma.

This ransomware does not deploy any techniques of UAC bypass. When we try to run it manually, the UAC confirmation pops up:

uac_prompt.png

If we accept it, the main process deploys another copy of itself, with elevated privileges. It also executes some commands via windows shell.

phobos_running-600x46.png

Ransom notes of two types are being dropped: .txt as well as .hta. After the encryption process is finished, the ransom note in the .hta form is popped up:

encrypted.png

Even after the initial ransom note is popped up, the malware still runs in the background, and keeps encrypting newly created files.

All local disks, as well as network shares are attacked.

It also uses several persistence mechanisms: installs itself in %APPDATA% and in a Startup folder, adding the registry keys to autostart its process when the system is restarted.

persistence.png

Those mechanisms make Phobos ransomware very aggressive: the infection didn’t end on a single run, but can be repeated multiple times. To prevent repeated infection, we should remove all the persistence mechanisms as soon as we noticed that we got attacked by Phobos.

Impact

File encryption

Indicators of Compromise

Malware Hash (MD5/SHA1/SH256)

  • d50f69f0d3a73c0a58d2ad08aedac1c8
  • a91491f45b851a07f91ba5a200967921bf796d38677786de51a4a8fe5ddeafd2

Remediation

  • Block all threat indicators at your respective controls.
  • Always be suspicious 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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