Analysis

  • max time kernel
    147s
  • max time network
    152s
  • platform
    windows10_x64
  • resource
    win10v20210408
  • submitted
    02/08/2021, 22:57

General

  • Target
    9D56B6756315368DC9B5BC15E2A40DB272B0C62600C74.exe
  • Size 21.5MB
  • Sample210802-cbxj347wc6
  • SHA256 9d56b6756315368dc9b5bc15e2a40db272b0c62600c744663b06c122f1f51ab8
  • MD5 SHA1 SHA512

Malware Config

Signatures

  • RuRAT

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

  • Blocklisted process makes network request 5 IoCs
  • Executes dropped EXE 9 IoCs
  • Checks computer location settings 2 TTPs 3 IoCs

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

  • Loads dropped DLL 11 IoCs
  • Checks installed software on the system 1 TTPs

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

  • 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 System32 directory 8 IoCs
  • Drops file in Program Files directory 57 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 52 IoCs
  • Modifies registry class 24 IoCs
  • Modifies system certificate store 2 TTPs 5 IoCs
  • Suspicious behavior: EnumeratesProcesses 54 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 20 IoCs
  • Suspicious use of WriteProcessMemory 30 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\9D56B6756315368DC9B5BC15E2A40DB272B0C62600C74.exe
    "C:\Users\Admin\AppData\Local\Temp\9D56B6756315368DC9B5BC15E2A40DB272B0C62600C74.exe"
    1⤵
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of WriteProcessMemory
    PID:860
    • C:\Windows\SysWOW64\msiexec.exe
      "C:\Windows\System32\msiexec.exe" /i "C:\Users\Admin\AppData\Local\Temp\RUT_{BF0BE76E-2D09-46E2-B200-624C9F058D6E}\host.msi" /qn
      2⤵
      • Suspicious use of AdjustPrivilegeToken
      PID:500
  • 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:2312
    • C:\Windows\syswow64\MsiExec.exe
      C:\Windows\syswow64\MsiExec.exe -Embedding F11AFA39ECB03A98393FFAA6633A7C9A
      2⤵
      • Loads dropped DLL
      PID:1576
    • 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_{BF0BE76E-2D09-46E2-B200-624C9F058D6E}\host.msi"
      2⤵
      • Executes dropped EXE
      • Checks computer location settings
      • Suspicious behavior: EnumeratesProcesses
      PID:4056
    • 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:3960
    • 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:3152
    • 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:4088
  • C:\Program Files (x86)\Remote Utilities - Host\rutserv.exe
    "C:\Program Files (x86)\Remote Utilities - Host\rutserv.exe" -service
    1⤵
    • Executes dropped EXE
    • Loads dropped DLL
    • Drops file in System32 directory
    • Drops file in Program Files directory
    • Modifies data under HKEY_USERS
    • Modifies system certificate store
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of SetWindowsHookEx
    • Suspicious use of WriteProcessMemory
    PID:3596
    • 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:1664
      • 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: EnumeratesProcesses
        • Suspicious behavior: SetClipboardViewer
        PID:1712
    • 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 behavior: EnumeratesProcesses
      • Suspicious use of FindShellTrayWindow
      • Suspicious use of SendNotifyMessage
      PID:416
    • 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:2612
  • C:\Windows\system32\compattelrunner.exe
    C:\Windows\system32\compattelrunner.exe -m:aeinv.dll -f:UpdateSoftwareInventoryW
    1⤵
      PID:608

    Network

          MITRE ATT&CK Enterprise v6

          Replay Monitor

          Loading Replay Monitor...

          Downloads

          memory/416-186-0x0000000004C10000-0x0000000004C11000-memory.dmp

          memory/416-185-0x0000000004A40000-0x0000000004A41000-memory.dmp

          memory/416-184-0x00000000048D0000-0x00000000048D1000-memory.dmp

          memory/416-172-0x0000000001430000-0x0000000001431000-memory.dmp

          memory/860-114-0x0000000003280000-0x000000000332E000-memory.dmp

          memory/1664-182-0x0000000004A70000-0x0000000004A71000-memory.dmp

          memory/1664-173-0x0000000001190000-0x0000000001191000-memory.dmp

          memory/1664-183-0x0000000004AC0000-0x0000000004AC1000-memory.dmp

          memory/1664-181-0x0000000004A20000-0x0000000004A21000-memory.dmp

          memory/1712-191-0x0000000002FA0000-0x0000000002FA1000-memory.dmp

          memory/2612-196-0x0000000003970000-0x0000000003971000-memory.dmp

          memory/3152-143-0x0000000001710000-0x00000000017BE000-memory.dmp

          memory/3596-180-0x0000000005DC0000-0x0000000005DC1000-memory.dmp

          memory/3596-168-0x0000000004D20000-0x0000000004D21000-memory.dmp

          memory/3596-176-0x0000000005350000-0x0000000005351000-memory.dmp

          memory/3596-175-0x00000000044B0000-0x00000000044B1000-memory.dmp

          memory/3596-178-0x0000000004E40000-0x0000000004E41000-memory.dmp

          memory/3596-177-0x0000000004DF0000-0x0000000004DF1000-memory.dmp

          memory/3596-163-0x0000000003C10000-0x0000000003C11000-memory.dmp

          memory/3596-179-0x00000000059F0000-0x00000000059F1000-memory.dmp

          memory/3596-159-0x0000000001CD0000-0x0000000001CD1000-memory.dmp

          memory/3596-171-0x0000000004490000-0x0000000004491000-memory.dmp

          memory/3596-160-0x0000000003B70000-0x0000000003B71000-memory.dmp

          memory/3596-167-0x0000000003E40000-0x0000000003E41000-memory.dmp

          memory/3596-162-0x0000000003BE0000-0x0000000003BE1000-memory.dmp

          memory/3596-161-0x0000000003BD0000-0x0000000003BD1000-memory.dmp

          memory/3596-187-0x0000000003BC0000-0x0000000003BC1000-memory.dmp

          memory/3596-188-0x0000000004BA0000-0x0000000004BA1000-memory.dmp

          memory/3596-174-0x00000000044A0000-0x00000000044A1000-memory.dmp

          memory/3596-170-0x0000000003C30000-0x0000000003C31000-memory.dmp

          memory/3960-137-0x0000000001850000-0x0000000001851000-memory.dmp

          memory/4056-131-0x0000000001200000-0x0000000001201000-memory.dmp

          memory/4088-147-0x0000000001870000-0x0000000001871000-memory.dmp