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    Rewterz Threat Alert – New Rumba STOP Ransomware Being Installed by Software Cracks

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    March 25, 2023
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    Rewterz Threat Alert – GandCrab or .CRAB Ransomware – Active IOCs
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    Rewterz Threat Alert – New Rumba STOP Ransomware Being Installed by Software Cracks

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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 […]

    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 Advisory – CVE-2019-2426 – Oracle Java SE Information Disclosure Vulnerability
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Rewterz Threat Alert – New Rumba STOP Ransomware Being Installed by Software Cracks

January 23, 2019

SEVERITY: High

 

 

ANALYSIS SUMMARY

 

 

Adware installers disguised as cracks have been used for a massive distribution of the STOP ransomware during the last month. This campaign continues with a new variant released over the past few days that appends the .rumba extension to the names of encrypted files.

 

 

Using adware bundles and software cracks as a new distribution method, STOP has become one of the most prolific ransomware infections we have seen in quite a while. First starting with the .djvu extension, then switching to the .tro extension, a common practice used by sites that distribute software cracks is to utilize adware bundles in order to generate revenue. These bundles will normally install unwanted extensions, adware, clickers, and miners, but one bundler appears to
be turning a blind eye and has started distributing the STOP Ransomware as well.

 

 

Some of the reported cracks that are installing this ransomware include Windows activation cracks such as KMSPico, Cubase, Photoshop, antivirus software, and cracks for many other popular copyrighted software. From reports by infected users, it does not appear to be one particular crack site that is affected, but many different ones who are pushing similar adware bundles.

 

 

 

 

In this new variant, not much has changed and the developers continue to use the same approach. The main difference is in this version the ransomware will append the .rumba extension to a file’s name after it is encrypted as shown below.

 

 

 

 

In each folder that a file is encrypted, the ransomware will create a ransom note named _openme.txt that contains instructions on how to contact the attacker for payment instructions.

 

 

 

 

IMPACT

 

 

Encryption of personal information

 

 

INDICATORS OF COMPROMISE

 

 

Extension

 

.rumba

 

 

Malware Hash (MD5/SHA1/SH256)

 

2b43163fdbeab448c292abb4e34dc395175b80328232d4fd884011ee525cedb6

 

 

REMEDIATION

 

 

It is recommended to install legitimate and well-reputed adware blocker available in different browsers.

Platform

  • Rewterz XDR
  • Rewterz Defense
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Managed Security Services

  • Managed Security Monitoring
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Assess

  • Compromise Assessment
  • APT Assessment
  • Penetration Testing
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  • Red Team Assessment
  • Purple Team Assessment
  • Social Engineering
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Transform

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  • SOC Maturity Assessment
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  • 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

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  • Monthly Threat Insights
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Resources

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Connect With Us

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