Analysis

  • max time kernel
    150s
  • max time network
    159s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220414-en
  • submitted
    08/05/2022, 07:30

General

  • Target
    3f62f75c0294381629c8cb14382a5ab1d27e83966014961a414cd9411abd27a7.exe
  • Size 217KB
  • Sample220508-jb73daebaj
  • SHA256 3f62f75c0294381629c8cb14382a5ab1d27e83966014961a414cd9411abd27a7
  • MD5 SHA1 SHA512

Malware Config

Extracted

Family
  • revengerat

Botnet
  • NyanCatRevenge

C2
  • hpdndbnb.duckdns.org:2404

Mutex
  • 90a49aa7c27647e

Signatures

  • Modifies WinLogon for persistence 2 TTPs 1 IoCs
  • Modifies Windows Defender Real-time Protection settings 3 TTPs
  • RevengeRAT

    Remote-access trojan with a wide range of capabilities.

  • Turns off Windows Defender SpyNet reporting 2 TTPs
  • Windows security bypass 2 TTPs
  • Checks computer location settings 2 TTPs 1 IoCs

    Looks up country code configured in the registry, likely geofence.

  • Drops startup file 2 IoCs
  • Windows security modification 2 TTPs 11 IoCs
  • Adds Run key to start application 2 TTPs 2 IoCs
  • Legitimate hosting services abused for malware hosting/C2 1 TTPs
  • Suspicious use of NtSetInformationThreadHideFromDebugger 15 IoCs
  • Suspicious use of SetThreadContext 1 IoCs
  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

  • Program crash 1 IoCs
  • Checks processor information in registry 2 TTPs 2 IoCs

    Processor information is often read in order to detect sandboxing environments.

  • Delays execution with timeout.exe 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 11 IoCs
  • Suspicious use of AdjustPrivilegeToken 5 IoCs
  • Suspicious use of WriteProcessMemory 23 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\3f62f75c0294381629c8cb14382a5ab1d27e83966014961a414cd9411abd27a7.exe
    "C:\Users\Admin\AppData\Local\Temp\3f62f75c0294381629c8cb14382a5ab1d27e83966014961a414cd9411abd27a7.exe"
    1⤵
    • Modifies WinLogon for persistence
    • Checks computer location settings
    • Drops startup file
    • Windows security modification
    • Adds Run key to start application
    • Suspicious use of NtSetInformationThreadHideFromDebugger
    • Suspicious use of SetThreadContext
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:2480
    • C:\Windows\SysWOW64\timeout.exe
      timeout 48
      2⤵
      • Delays execution with timeout.exe
      PID:1424
    • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Local\Temp\3f62f75c0294381629c8cb14382a5ab1d27e83966014961a414cd9411abd27a7.exe" -Force
      2⤵
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:4304
    • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\3f62f75c0294381629c8cb14382a5ab1d27e83966014961a414cd9411abd27a7.exe" -Force
      2⤵
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:3444
    • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\3f62f75c0294381629c8cb14382a5ab1d27e83966014961a414cd9411abd27a7.exe" -Force
      2⤵
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:3896
    • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\3f62f75c0294381629c8cb14382a5ab1d27e83966014961a414cd9411abd27a7.exe" -Force
      2⤵
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:3600
    • C:\Users\Admin\AppData\Local\Temp\3f62f75c0294381629c8cb14382a5ab1d27e83966014961a414cd9411abd27a7.exe
      "C:\Users\Admin\AppData\Local\Temp\3f62f75c0294381629c8cb14382a5ab1d27e83966014961a414cd9411abd27a7.exe"
      2⤵
      • Checks processor information in registry
      PID:3052
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 2480 -s 2276
      2⤵
      • Program crash
      PID:5116
  • C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -pss -s 424 -p 2480 -ip 2480
    1⤵
      PID:3456

    Network

          MITRE ATT&CK Enterprise v6

          Replay Monitor

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          Downloads

          powershell.exe.log

          • Path C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0_32\UsageLogs\powershell.exe.log
          • Size 2KB
          • SHA256 6f8fd1b8d9788ad54eaeee329232187e24b7b43393a01aeba2d6e9675231fb69
          • MD5 SHA1 SHA512

          StartupProfileData-NonInteractive

          • Path C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
          • Size 18KB
          • SHA256 5595c752a8f185e2f6d723fb38e0c2f8e6711bfda658ca54ece19266e8a14865
          • MD5 SHA1 SHA512 SSDEEP

          StartupProfileData-NonInteractive

          • Path C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
          • Size 18KB
          • SHA256 5595c752a8f185e2f6d723fb38e0c2f8e6711bfda658ca54ece19266e8a14865
          • MD5 SHA1 SHA512 SSDEEP

          StartupProfileData-NonInteractive

          • Path C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
          • Size 18KB
          • SHA256 9ed96f3e724c259bf215eb62fb67278de671fba7a6a4f6dbba53fe553b0c8ab7
          • MD5 SHA1 SHA512 SSDEEP

          memory/2480-133-0x0000000005CF0000-0x0000000006294000-memory.dmp

          memory/2480-131-0x0000000005360000-0x00000000053FC000-memory.dmp

          memory/2480-130-0x0000000000A90000-0x0000000000ACA000-memory.dmp

          memory/3052-145-0x0000000000400000-0x000000000040C000-memory.dmp

          memory/3444-146-0x0000000007640000-0x0000000007672000-memory.dmp

          memory/3444-150-0x000000006FA20000-0x000000006FA6C000-memory.dmp

          memory/3600-137-0x00000000027D0000-0x0000000002806000-memory.dmp

          memory/3600-143-0x00000000060C0000-0x00000000060DE000-memory.dmp

          memory/3600-141-0x00000000059F0000-0x0000000005A56000-memory.dmp

          memory/3600-142-0x0000000005B60000-0x0000000005BC6000-memory.dmp

          memory/3600-140-0x00000000050F0000-0x0000000005112000-memory.dmp

          memory/3600-148-0x000000006FA20000-0x000000006FA6C000-memory.dmp

          memory/3600-139-0x0000000005210000-0x0000000005838000-memory.dmp

          memory/3600-153-0x00000000073D0000-0x00000000073EA000-memory.dmp

          memory/3896-149-0x000000006FA20000-0x000000006FA6C000-memory.dmp

          memory/3896-152-0x0000000007650000-0x0000000007CCA000-memory.dmp

          memory/3896-154-0x0000000007080000-0x000000000708A000-memory.dmp

          memory/3896-156-0x0000000007240000-0x000000000724E000-memory.dmp

          memory/4304-155-0x0000000007390000-0x0000000007426000-memory.dmp

          memory/4304-157-0x0000000007450000-0x000000000746A000-memory.dmp

          memory/4304-158-0x0000000007430000-0x0000000007438000-memory.dmp

          memory/4304-147-0x000000006FA20000-0x000000006FA6C000-memory.dmp

          memory/4304-151-0x00000000063C0000-0x00000000063DE000-memory.dmp