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    Rewterz Threat Alert – Banks All over the World Attacked by Silence Advanced Hackers

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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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    • Compromise Assessment
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    • Purple Team Assessment
    • Social Engineering
    • Source Code Review

    Transform

    • SOC Consultancy
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    • SIEM Gap Analysis
    • SIEM Optimization
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    March 21, 2023
    March 21, 2023
    Rewterz Threat Alert – Rhadamanthys Stealer – Active IOCs
    Severity Medium Analysis Summary Rhadamanthys is a type of malware known as a stealer, which is designed to steal sensitive information from infected computers. It was […]
    March 21, 2023
    March 21, 2023
    Rewterz Threat Alert – Mirai Botnet aka Katana – Active IOCs
    Severity High Analysis Summary The Mirai botnet is a type of malware that infects Internet of Things (IoT) devices, such as routers, security cameras, and other […]
    March 21, 2023
    March 21, 2023
    Rewterz Threat Alert – LockBit Ransomware – Active IOCs
    Severity High Analysis Summary LockBit ransomware takes as little as five minutes to deploy the encryption routine on target systems once it lands on the victim […]

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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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    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.
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logo_SVG-01
  • Platform
    xdrLogo
    center_new
    Read More about XDR

    Platform

    • Rewterz XDR
    • Rewterz Defense
    • Rewterz Threat Intelligence
    Rewterz Threat Alert – Banks All over the World Attacked by Silence Advanced Hackers

    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
    • SOC Model Evaluation
    • SOC Gap Analysis
    • SIEM Gap Analysis
    • SIEM Optimization
    • SOC Content Pack

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    • Simulated Cyber Attack Exercise
    • Tabletop Exercise
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    March 21, 2023
    March 21, 2023
    Rewterz Threat Alert – Rhadamanthys Stealer – Active IOCs
    Severity Medium Analysis Summary Rhadamanthys is a type of malware known as a stealer, which is designed to steal sensitive information from infected computers. It was […]
    March 21, 2023
    March 21, 2023
    Rewterz Threat Alert – Mirai Botnet aka Katana – Active IOCs
    Severity High Analysis Summary The Mirai botnet is a type of malware that infects Internet of Things (IoT) devices, such as routers, security cameras, and other […]
    March 21, 2023
    March 21, 2023
    Rewterz Threat Alert – LockBit Ransomware – Active IOCs
    Severity High Analysis Summary LockBit ransomware takes as little as five minutes to deploy the encryption routine on target systems once it lands on the victim […]

    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 – Adwind Bypasses Microsoft ATP to Attack Utilities Industry
August 22, 2019
Rewterz
Rewterz Threat Advisory – CVE-2019-15295 – BitDefender Antivirus Free 2020 – Privilege Escalation to SYSTEM
August 22, 2019

Rewterz Threat Alert – Banks All over the World Attacked by Silence Advanced Hackers

August 22, 2019

Severity

High

Analysis Summary

Advance hacker group Silence has increased their activity significantly over the past year. Victims in the financial sector are scattered across more than 30 countries and financial losses have quintupled. Started in 2016, Silence group has attracted many eye balls after initial fail over their victims, since then it has managed to steal at least $4.2 million, initially from banks in the former Soviet Union, then from victims in Europe, Latin America, Africa, and Asia.

Tools and Tactics


The researchers say that Silence has improved its operational security and changed its toolset to thwart detection. Apart from rewriting the first-stage module (Silence.Downloader / Truebot), the group began using a PowerShell-based fileless loader called Ivoke.

For lateral movement in the victim network, a new PowerShell agent is used, called EmpireDNSAgent (EDA) because it is based on the recently abandoned Empire framework and the dnscat2 project.

In October 2018, Silence started to send out reconnaissance emails that would help better prepare an attack. Such a message would carry no payload and pretended to be an automated reply for a failed delivery.

Silence2_faildelivery_eml.png

The purpose was to receive an updated list of active email addresses from the target. Silence sent out over 170,000 of these emails during three separate campaigns against victims in Asia, Europe, and post-Soviet countries.

The recon campaign on financial institutions in Europe was the smallest one, with less than 10,000 emails delivered. The focus was on British financial companies.

Asia_TW_eng.jpg

After validating email addresses, the threat actor moves to the next stages of the attack and starts sending out messages with a payload that downloads Silence-specific malware.

Persistence and lateral movement follow, using self-developed tools or binaries already available on the target system.

In the final stage, the attacker reaches the card processing machines and can control ATMs using its Atmosphere trojan or a program called ‘xfs-disp.exe’ to dispense cash to money mules at specific times.

Impact

Financial loss

Remediation

  • 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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