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    Rewterz Threat Alert – A Threat from the Shadows of LokiLocker, BlackBit Ransomware Being Distributed In Korea – Active IOCs

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    May 25, 2023
    Rewterz
    May 25, 2023
    Rewterz Threat Alert – STOP (DJVU) Ransomware – Active IOCs
    Severity High Analysis Summary The STOP/DJVU ransomware initially made headlines in 2018 and has since been attacking individuals all around the world. It’s widespread on torrent […]
    May 24, 2023
    Rewterz
    May 24, 2023
    Rewterz Threat Advisory – CVE-2023-30440 – IBM PowerVM Hypervisor Vulnerability
    Severity Medium Analysis Summary CVE-2023-30440 IBM PowerVM Hypervisor could allow a local attacker with control a partition that has been assigned SRIOV virtual function (VF) to […]
    May 24, 2023
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    May 24, 2023
    Rewterz Threat Advisory – CVE-2023-33246 – Apache RocketMQ Vulnerability
    Severity High Analysis Summary CVE-2023-33246 Apache RocketMQ could allow a remote attacker to execute arbitrary commands on the system, caused by a flaw when using the […]

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    Annual Threat Intelligence Report 2022
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  • 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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    Read More about XDR

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    • Rewterz XDR
    • Rewterz Defense
    • Rewterz Threat Intelligence
    Rewterz Threat Alert – A Threat from the Shadows of LokiLocker, BlackBit Ransomware Being Distributed In Korea – Active IOCs

    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
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    • Architecture Design & Review
    • Red Team Assessment
    • Purple Team Assessment
    • Social Engineering
    • Source Code Review

    Transform

    • SOC Consultancy
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    May 25, 2023
    Rewterz
    May 25, 2023
    Rewterz Threat Alert – STOP (DJVU) Ransomware – Active IOCs
    Severity High Analysis Summary The STOP/DJVU ransomware initially made headlines in 2018 and has since been attacking individuals all around the world. It’s widespread on torrent […]
    May 24, 2023
    Rewterz
    May 24, 2023
    Rewterz Threat Advisory – CVE-2023-30440 – IBM PowerVM Hypervisor Vulnerability
    Severity Medium Analysis Summary CVE-2023-30440 IBM PowerVM Hypervisor could allow a local attacker with control a partition that has been assigned SRIOV virtual function (VF) to […]
    May 24, 2023
    Rewterz
    May 24, 2023
    Rewterz Threat Advisory – CVE-2023-33246 – Apache RocketMQ Vulnerability
    Severity High Analysis Summary CVE-2023-33246 Apache RocketMQ could allow a remote attacker to execute arbitrary commands on the system, caused by a flaw when using the […]

    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 – An Emerging Ducktail Infostealer – Active IOCs
May 17, 2023
Rewterz
Rewterz Threat Advisory – CVE-2023-30438 – IBM PowerVM Vulnerability
May 18, 2023

Rewterz Threat Alert – A Threat from the Shadows of LokiLocker, BlackBit Ransomware Being Distributed In Korea – Active IOCs

May 17, 2023

Severity

High

Analysis Summary

According to researchers, BlackBit ransomware is being distributed in Korea. It is identified as a variant of LokiLocker ransomware and operates on the Ransomware-as-a-Service (RaaS) model. The source code analysis of BlackBit suggests that it is a copy of LokiLocker with cosmetic changes such as icons, name, and color scheme. These modifications may have been made to differentiate BlackBit from its original counterpart and potentially confuse security researchers.

Here is a summary of the common traits between LokiLocker and BlackBit ransomware: 

  • File Disguise: LokiLocker and BlackBit ransomware both disguise themselves as svchost.exe files. This technique aims to trick users into executing the ransomware, thinking it is a legitimate system process.
  • Obfuscation: Both ransomware strains utilize the same obfuscation tool, .NET Reactor, to make the analysis and reverse-engineering of their code more challenging. Obfuscation helps protect the malware from detection and analysis by security researchers.
  • Malware Persistence: LokiLocker and BlackBit register themselves to the task scheduler and the Windows registry to achieve persistence. This means that even if the infected system is restarted, the ransomware will automatically execute again, ensuring a prolonged presence on the compromised system.
  • Ransom Note Generation: Upon successful infection, both ransomware variants generate a ransom note. In the case of LokiLocker, the ransom note is named “Restore-My-Files.txt” and is created in each infected folder path. The design and content of the ransom notes resemble those used by BlackBit ransomware.
  • Data Encryption: LokiLocker and BlackBit ransomware both employ data encryption techniques. They encrypt the victim’s files, making them inaccessible until a ransom payment is made and a decryption key is provided by the attackers.
  • Anti-Recovery Measures: Both ransomware strains engage in activities to impede file recovery efforts. They delete volume shadow copies, which are backup snapshots created by the operating system, to prevent users from restoring their files through these means.
  • Detection Evasion: LokiLocker and BlackBit ransomware perform actions aimed at obstructing detection and information leakage. These actions can include disabling security software, terminating processes related to backup and recovery tools, and attempting to evade network monitoring systems.

These similarities suggest a strong connection between LokiLocker and BlackBit ransomware, indicating a potential relationship between the two or the possibility that LokiLocker was directly inspired by BlackBit. Such observations highlight the need for robust cybersecurity measures to protect against ransomware attacks and emphasize the importance of staying vigilant and implementing security best practices.

Impact

  • File Encryption
  • Deletion Of System Backup

Indicators of Compromise

MD5

  • d03823a205919b6927f3fa3164be5ac5

SHA-256

  • c9b1665e58fe0bd5a47bac14d7f262fcb21a90775c97bd778288c21eaac7435b

SHA-1

  • 409181132564166a62ee867321ebc07089e49085

Remediation

  • Block all threat indicators at your respective controls.
  • Search for Indicators of compromise (IOCs) in your environment utilizing your respective security controls
  • Emails from unknown senders should always be treated with caution.
  • Never trust or open ” links and attachments received from unknown sources/senders
  • Patch and upgrade any platforms and software timely and make it into a standard security policy. Prioritize patching known exploited vulnerabilities and zero-days.
  • Enable antivirus and anti-malware software and update signature definitions in a timely manner. Using multi-layered protection is necessary to secure vulnerable assets

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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