Analysis

  • max time kernel
    13s
  • max time network
    52s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220414-en
  • submitted
    24/05/2022, 15:00

General

  • Target
    e1763315e4a75661f19e324cac85ea4b1acbe6ffe2a2dc9441bd6fc2d89f3031.exe
  • Size 6.2MB
  • Sample220524-sdg4eaahhp
  • SHA256 e1763315e4a75661f19e324cac85ea4b1acbe6ffe2a2dc9441bd6fc2d89f3031
  • MD5 SHA1 SHA512

Malware Config

Signatures

  • Modifies WinLogon for persistence 2 TTPs 3 IoCs
  • RMS

    Remote Manipulator System (RMS) is a remote access tool developed by Russian organization TektonIT.

  • Executes dropped EXE 3 IoCs
  • Checks computer location settings 2 TTPs 2 IoCs

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

  • Adds Run key to start application 2 TTPs 2 IoCs
  • Drops file in Windows directory 13 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Runs .reg file with regedit 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of SetWindowsHookEx 2 IoCs
  • Suspicious use of WriteProcessMemory 18 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\e1763315e4a75661f19e324cac85ea4b1acbe6ffe2a2dc9441bd6fc2d89f3031.exe
    "C:\Users\Admin\AppData\Local\Temp\e1763315e4a75661f19e324cac85ea4b1acbe6ffe2a2dc9441bd6fc2d89f3031.exe"
    1⤵
    • Modifies WinLogon for persistence
    • Checks computer location settings
    • Adds Run key to start application
    • Drops file in Windows directory
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of WriteProcessMemory
    PID:4428
    • C:\Windows\System64\1rfusclient.exe
      "C:\Windows\System64\1rfusclient.exe"
      2⤵
      • Modifies WinLogon for persistence
      • Executes dropped EXE
      • Checks computer location settings
      • Adds Run key to start application
      • Drops file in Windows directory
      • Suspicious use of WriteProcessMemory
      PID:612
      • C:\Windows\SysWOW64\regedit.exe
        "C:\Windows\System32\regedit.exe" /s "C:\Windows\Zont911\Regedit.reg"
        3⤵
        • Runs .reg file with regedit
        PID:5000
      • C:\Windows\SysWOW64\cmd.exe
        C:\Windows\system32\cmd.exe /c ""C:\Windows\Zont911\Tupe.bat" "
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:1068
  • C:\Windows\System64\svnhost.exe
    "C:\Windows\System64\svnhost.exe" /silentinstall
    1⤵
    • Executes dropped EXE
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of SetWindowsHookEx
    PID:4456
  • C:\Windows\System64\svnhost.exe
    "C:\Windows\System64\svnhost.exe" /firewall
    1⤵
    • Executes dropped EXE
    • Suspicious use of SetWindowsHookEx
    PID:4624
  • C:\Windows\SysWOW64\chcp.com
    Chcp 1251
    1⤵
      PID:2924
    • C:\Windows\System64\svnhost.exe
      "C:\Windows\System64\svnhost.exe" /start
      1⤵
        PID:4548
      • C:\Windows\System64\svnhost.exe
        C:\Windows\System64\svnhost.exe
        1⤵
          PID:4592
          • C:\Windows\System64\systemsmss.exe
            C:\Windows\System64\systemsmss.exe /tray
            2⤵
              PID:4168
            • C:\Windows\System64\systemsmss.exe
              C:\Windows\System64\systemsmss.exe
              2⤵
                PID:392

            Network

                  MITRE ATT&CK Enterprise v6

                  Replay Monitor

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                  Downloads

                  1rfusclient.exe

                  • Path C:\Windows\System64\1rfusclient.exe
                  • Size 1.9MB
                  • SHA256 f1d6d99ada408318c23dc3e49428d948e32b2d28d0eae42ccc5171c41f09bf20
                  • MD5 SHA1 SHA512 SSDEEP

                  1rfusclient.exe

                  • Path C:\Windows\System64\1rfusclient.exe
                  • Size 1.4MB
                  • SHA256 bb6568784419b583af9d051c99f738a28a0117e2dafe4ab0622a4dcade3604c5
                  • MD5 SHA1 SHA512 SSDEEP

                  svnhost.exe

                  • Path C:\Windows\System64\svnhost.exe
                  • Size 105KB
                  • SHA256 72ebccfc4372aaba5564f6047000ef0d5057678071c74e5827dfcdbe851e3a00
                  • MD5 SHA1 SHA512 SSDEEP

                  svnhost.exe

                  • Path C:\Windows\System64\svnhost.exe
                  • Size 185KB
                  • SHA256 9514c6d30abe5463c5562f0cc25c2364be3b878db2ed13590b35a630bd5014ba
                  • MD5 SHA1 SHA512 SSDEEP

                  svnhost.exe

                  • Path C:\Windows\System64\svnhost.exe
                  • Size 187KB
                  • SHA256 cf5b108ca926be2ebfb44818d4f8c8428acbbe0ba540418778b53b01b92073d5
                  • MD5 SHA1 SHA512 SSDEEP

                  svnhost.exe

                  • Path C:\Windows\System64\svnhost.exe
                  • Size 149KB
                  • SHA256 dc65cec19d603561ab9f9bf9025bdc1a6e33d5bf08ab3b40b19b3516ce5dbba2
                  • MD5 SHA1 SHA512 SSDEEP

                  svnhost.exe

                  • Path C:\Windows\System64\svnhost.exe
                  • Size 175KB
                  • SHA256 22bf534da472b0019e2502fb66e8b0269292a43a22755cd7ca101b281415d740
                  • MD5 SHA1 SHA512 SSDEEP

                  systemsmss.exe

                  • Path C:\Windows\System64\systemsmss.exe
                  • Size 135KB
                  • SHA256 a07e0e66ac804a0c8022c163dcd80852ea0a942bb26bcffa3a15c74e1f6d27a8
                  • MD5 SHA1 SHA512 SSDEEP

                  systemsmss.exe

                  • Path C:\Windows\System64\systemsmss.exe
                  • Size 195KB
                  • SHA256 077b24c80f819e84eca5dd99d5a5ae7a211daf7fd5e916aaa1deda7ce0af741f
                  • MD5 SHA1 SHA512 SSDEEP

                  systemsmss.exe

                  • Path C:\Windows\System64\systemsmss.exe
                  • Size 136KB
                  • SHA256 1e000013585fe39f9e1e2f90872740ac449f671979c1800709ca3d2d92cb2d2f
                  • MD5 SHA1 SHA512 SSDEEP

                  vp8decoder.dll

                  • Path C:\Windows\System64\vp8decoder.dll
                  • Size 139KB
                  • SHA256 438931666f33395fa5940ad444045f151d34963c88e449d2acec94aac240ff3a
                  • MD5 SHA1 SHA512 SSDEEP

                  vp8encoder.dll

                  • Path C:\Windows\System64\vp8encoder.dll
                  • Size 227KB
                  • SHA256 1f86cf082d5c1060561b696c6bb57d398d55d6187c240c99fe3c8c306012bced
                  • MD5 SHA1 SHA512 SSDEEP

                  Regedit.reg

                  • Path C:\Windows\Zont911\Regedit.reg
                  • Size 11KB
                  • SHA256 1360100a21148dc3073474ea2ac0aa7c3eca89290901421d2b78d5452c26aa0f
                  • MD5 SHA1 SHA512 SSDEEP

                  Tupe.bat

                  • Path C:\Windows\Zont911\Tupe.bat
                  • Size 281B
                  • SHA256 6fbce5a6530fe597afa45f71efba019f881765e26eeaa964d653c266e609593e
                  • MD5 SHA1 SHA512