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    Rewterz Threat Alert – APT Group Gamaredon aka Shuckworm – Active IOCs
    Severity High Analysis Summary Shuckworm APT – aka Actinium, Armageddon, Primitive Bear, Gamaredon, and Trident Ursa – is a Russia-backed advanced persistent threat (APT) that has […]
    June 2, 2023
    Rewterz
    June 2, 2023
    Rewterz Threat Alert – StormKitty Stealer: A Threatening Information-Stealing Malware – Active IOCs
    Severity High Analysis Summary StormKitty information stealer is designed to compromise sensitive data from infected systems, such as login credentials, passwords, cryptocurrency wallets, and other valuable […]
    June 2, 2023
    Rewterz
    June 2, 2023
    Rewterz Threat Alert –Tofsee Malware – Active IOCs
    Severity High Analysis Summary Tofsee malware has been around since 2016. Once installed on a compromised computer, it can be used to send spam emails and […]

    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

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    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 – Cerberus – A Banking Trojan Targeting Banking Apps – IoCs

September 4, 2019

Severity

Medium

Analysis Summary

As reported earlier, a new Android malware called Cerberus is being used for malicious purposes. Along with the standard payload and string obfuscation, it uses a new technique to prevent analysis. It uses the device accelerometer sensor to implement a pedometer and measures movements of the victim. When victims move around, the Trojan detects increased step count and activates the bot. If the step counter hits the pre-configured threshold it considers running on the device to be safe. Therefore, the Trojan does not run on test devices of malware analysts and evades dynamic analysis environments and sandboxes.
When the malware is first started on the device it will begin by hiding its icon from the application drawer. Then it will ask for the accessibility service privilege. After the user grants the requested privilege, Cerberus starts to abuse it by granting itself additional permissions, such as permissions needed to send messages and make calls, without requiring any user interaction. It also disables Play Protect (Google’s preinstalled antivirus solution) to prevent its discovery and deletion in the future. After conveniently granting itself additional privileges and securing its persistence on the device, Cerberus registers the infected device in the botnet and waits for commands from the C2 server while making use of overlay attacks, SMS control and contact list harvesting. The Trojan can also leverage keylogging. Following features are found in the Trojan:

Overlaying: Dynamic (Local injects obtained from C2)
Keylogging
SMS harvesting: SMS listing
SMS harvesting: SMS forwarding
Device info collection
Contact list collection
Application listing
Location collection
Overlaying: Targets list update
SMS: Sending
Calls: USSD request making
Calls: Call forwarding
Remote actions: App installing
Remote actions: App starting
Remote actions: App removal
Remote actions: Showing arbitrary web pages
Remote actions: Screen-locking
Notifications: Push notifications
C2 Resilience: Auxiliary C2 list
Self-protection: Hiding the App icon
Self-protection: Preventing removal
Self-protection: Emulation-detection
Architecture: Modular
The Trojan is being used to target banking and non-banking apps alike, worldwide. Additional IoCs are given below.

Impact

  • Information Disclosure
  • Credential Theft
  • Financial Loss

Indicators of Compromise

Malware Hash (MD5/SHA1/SH256)

  • ffa5ac3460998e7b9856fc136ebcd112196c3abf24816ccab1fbae11eae4954c
  • 1512c3fa688ca107784b3c93cd9f3526
  • 6ac7e7ed83b4b57cc4d28f14308d69d062d29a544bbde0856d5697b0fc50cde4
  • dc74daf70afc181471f41fd910a0dec0

Remediation

  • Block the threat indicators at respective controls.
  • Avoid downloading unnecessary applications.
  • Do not download software/applications from untrusted sources.
  • Be careful while granting permissions to applications and specially avoid allowing accessibility service privilege permissions, when not needed.
  • Always update these applications to the latest available versions, (in case vendors introduce mitigation updates against exploitation of these applications.)

Platform

  • Rewterz XDR
  • Rewterz Defense
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Managed Security Services

  • Managed Security Monitoring
  • Remote SOC
  • Onsite SOC
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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
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Threat Insights

  • Threat Advisories
  • Monthly Threat Insights
  • Threat Intelligence Reports

Resources

  • Blog
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Connect With Us

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