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Rewterz Threat Alert – Orcus RAT – Active IOCs
June 17, 2022
Rewterz Threat Alert – Nanocore Rat – Active IOCs
June 17, 2022

Rewterz Threat Alert – NJRAT – Active IOCs

June 17, 2022

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 versions of the secondary payload used, ranging from base64 encoded version, hexadecimal, JSON data format, compressed blobs, and also plain text data with malicious URLs embedded within. This is done in order to evade detection by security products and increase the possibility of operating unnoticed. njRat is developed in .NET framework and is able to hijack the functions of a compromised machine remotely, including taking screenshots, exfiltrating data, keylogging, and killing processes such as antivirus programs, while also connecting the machine to a botnet. RAT was also found abusing Windows API functions such as Windows API calls such as GetKeyboardState(), GetAsynckeyState(), MapVirtualKey() for keylogging, and data theft. It was also discovered downloading web scraping tools such as “proxy scrapper” in order to extract large amounts of data via proxies

Impact

  • Unauthorized Access

Indicators of Compromise

MD5

  • df214550980373dee4a7df3529fc1a0d
  • f10f0d9e0190a3a025b16daee7b0222d
  • 518fce6038c59e523eeae4d957adc4dd
  • ebd362cead250d37b6fccd2569ab7864
  • 844a7e296413f75b3d271a4acf29c228
  • d6fad446bac8435f66bc72692d8c689d

SHA-256

  • d9bf2be7b30ce4bb2e50824cb3e8f9c39de3491bc31faf603a2cc05ab7916848
  • 4dd54e45d55a8b49a5582027a812f2d2f055fb55c8f292d62c89236583822e9e
  • 61d5c13bd51a445f0e604af9bbfec3a791f700d33d7c3134ebda21fe774142c2
  • a198dcecc84ef9343f7ea290508cead1ddd9b113f01da7a99429b970ce887540
  • 39c169c40b4fe73e963ea41d7498aaaa75691b2b01c8c175578b966cc97a57d5
  • a238d778941efac06a2d92ea8c1faa42a5259d8ae7cdf2c8956d7edf6e64d303

SHA-1

  • 006e60c67aba56c85f5670edc08113d495abf276
  • 3bc1499e5617a9777252e376ce4b5cb9cce03760
  • ce22dfb5a58f136872739f6a27e564fe3f4ae672
  • 20969fa8c59e9bd35fbfe50c470b441a3cc608e3
  • 674fbf0daa154587196da0ed8b22de95b2b9fca3
  • a1f345f6fb7634c1f87a2dfda85f6fede9d7a970

Remediation

  • Block all threat indicators at your respective controls.
  • Search for IOCs in your environment.
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      • Compromise Assessment
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    • Tabletop Exercise
    • Simulated Cyber Attack Exercises
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      • Hybrid SOC
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      • Managed Risk-Based SOAR
      • Managed Penetration Testing
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  • Resources
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    • Threat Advisory
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