Overview

overview

10

Static

static

3c545c5efb...17.exe

windows7_x64

10

3c545c5efb...17.exe

windows10_x64

10

Analysis

  • max time kernel
    149s
  • max time network
    144s
  • platform
    windows10_x64
  • resource
    win10v20210410
  • submitted
    24/07/2021, 18:16

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General

  • Target
    3c545c5efb38a7291c3ba25d189df717.exe
  • Size 19.7MB
  • Sample210724-3jc56s6qfa
  • SHA256 040752d18f978a437684d118f6ca5322c51b956f8911b32307db1fd4559a916c
  • MD5 SHA1 SHA512
Score
10/10
ruratbackdoordiscoverytrojan

Malware Config

Signatures

  • RuRAT

    RuRAT is a remote admin tool sold as legitimate software but regularly abused in malicious phishing campaigns.

    trojanbackdoorrurat
  • Blocklisted process makes network request 2 IoCs
  • Executes dropped EXE 8 IoCs
  • Checks computer location settings 2 TTPs 3 IoCs

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

  • Loads dropped DLL 9 IoCs
  • Checks installed software on the system 1 TTPs

    Looks up Uninstall key entries in the registry to enumerate software on the system.

    discovery
  • Enumerates connected drives 3 TTPs 24 IoCs

    Attempts to read the root path of hard drives other than the default C: drive.

  • Drops file in Program Files directory 64 IoCs
  • Drops file in Windows directory 19 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Modifies data under HKEY_USERS 5 IoCs
  • Modifies registry class 26 IoCs
  • Suspicious behavior: EnumeratesProcesses 40 IoCs
  • Suspicious behavior: SetClipboardViewer 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 64 IoCs
  • Suspicious use of FindShellTrayWindow 2 IoCs
  • Suspicious use of SendNotifyMessage 2 IoCs
  • Suspicious use of SetWindowsHookEx 16 IoCs
  • Suspicious use of WriteProcessMemory 27 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\3c545c5efb38a7291c3ba25d189df717.exe
    "C:\Users\Admin\AppData\Local\Temp\3c545c5efb38a7291c3ba25d189df717.exe"
    1⤵
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of WriteProcessMemory
    PID:2280
    • C:\Windows\SysWOW64\msiexec.exe
      "C:\Windows\System32\msiexec.exe" /i "C:\Users\Admin\AppData\Local\Temp\RUT_{DB083584-5DA9-4BD2-B863-1ED8B07FF72E}\host6.12.b1_unsigned.msi" /qn
      2⤵
      • Suspicious use of AdjustPrivilegeToken
      PID:3952
  • C:\Windows\system32\msiexec.exe
    C:\Windows\system32\msiexec.exe /V
    1⤵
    • Blocklisted process makes network request
    • Enumerates connected drives
    • Drops file in Program Files directory
    • Drops file in Windows directory
    • Modifies data under HKEY_USERS
    • Modifies registry class
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:752
    • C:\Windows\syswow64\MsiExec.exe
      C:\Windows\syswow64\MsiExec.exe -Embedding B45C1E191ABC623BF052E71E9C27C6EF
      2⤵
      • Loads dropped DLL
      PID:208
    • C:\Program Files (x86)\Remote Utilities - Host\rfusclient.exe
      "C:\Program Files (x86)\Remote Utilities - Host\rfusclient.exe" -msi_copy "C:\Users\Admin\AppData\Local\Temp\RUT_{DB083584-5DA9-4BD2-B863-1ED8B07FF72E}\host6.12.b1_unsigned.msi"
      2⤵
      • Executes dropped EXE
      • Checks computer location settings
      PID:1344
    • C:\Program Files (x86)\Remote Utilities - Host\rutserv.exe
      "C:\Program Files (x86)\Remote Utilities - Host\rutserv.exe" /silentinstall
      2⤵
      • Executes dropped EXE
      • Loads dropped DLL
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of SetWindowsHookEx
      PID:3532
    • C:\Program Files (x86)\Remote Utilities - Host\rutserv.exe
      "C:\Program Files (x86)\Remote Utilities - Host\rutserv.exe" /firewall
      2⤵
      • Executes dropped EXE
      • Loads dropped DLL
      • Modifies data under HKEY_USERS
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of SetWindowsHookEx
      PID:3876
    • C:\Program Files (x86)\Remote Utilities - Host\rutserv.exe
      "C:\Program Files (x86)\Remote Utilities - Host\rutserv.exe" /start
      2⤵
      • Executes dropped EXE
      • Loads dropped DLL
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of SetWindowsHookEx
      PID:2084
  • C:\Program Files (x86)\Remote Utilities - Host\rutserv.exe
    "C:\Program Files (x86)\Remote Utilities - Host\rutserv.exe"
    1⤵
    • Executes dropped EXE
    • Loads dropped DLL
    • Drops file in Program Files directory
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of SetWindowsHookEx
    • Suspicious use of WriteProcessMemory
    PID:188
    • C:\Program Files (x86)\Remote Utilities - Host\rfusclient.exe
      "C:\Program Files (x86)\Remote Utilities - Host\rfusclient.exe" /tray
      2⤵
      • Executes dropped EXE
      • Checks computer location settings
      • Suspicious use of FindShellTrayWindow
      • Suspicious use of SendNotifyMessage
      PID:2124
    • C:\Program Files (x86)\Remote Utilities - Host\rfusclient.exe
      "C:\Program Files (x86)\Remote Utilities - Host\rfusclient.exe"
      2⤵
      • Executes dropped EXE
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of WriteProcessMemory
      PID:3288
      • C:\Program Files (x86)\Remote Utilities - Host\rfusclient.exe
        "C:\Program Files (x86)\Remote Utilities - Host\rfusclient.exe" /tray
        3⤵
        • Executes dropped EXE
        • Checks computer location settings
        • Suspicious behavior: SetClipboardViewer
        PID:1896
  • C:\Windows\system32\compattelrunner.exe
    C:\Windows\system32\compattelrunner.exe -m:aeinv.dll -f:UpdateSoftwareInventoryW
    1⤵
      PID:2132

    Network

          MITRE ATT&CK Enterprise v6

          Replay Monitor

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          Downloads

          memory/188-149-0x00000000001E0000-0x00000000001E1000-memory.dmp
          Download

          memory/1344-130-0x0000000000C40000-0x0000000000C63000-memory.dmp
          Download

          memory/1896-187-0x0000000000F70000-0x000000000102D000-memory.dmp
          Download

          memory/2084-144-0x00000000011D0000-0x000000000127E000-memory.dmp
          Download

          memory/2124-183-0x0000000000B50000-0x0000000000B51000-memory.dmp
          Download

          memory/2280-114-0x0000000001B00000-0x0000000001B01000-memory.dmp
          Download

          memory/3288-184-0x0000000000B90000-0x0000000000C3E000-memory.dmp
          Download

          memory/3532-138-0x0000000001260000-0x00000000013AA000-memory.dmp
          Download

          memory/3876-141-0x00000000013F0000-0x00000000013F1000-memory.dmp
          Download