Analysis

  • max time kernel
    145s
  • max time network
    152s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220414-en
  • submitted
    16/05/2022, 02:03

General

  • Target
    bc3758b4698a77d9126ad97c6bf695e2cfeb8b1ced85a948f24e7895c635ae44.exe
  • Size 4.3MB
  • Sample220516-cgsrbacbcq
  • SHA256 bc3758b4698a77d9126ad97c6bf695e2cfeb8b1ced85a948f24e7895c635ae44
  • MD5 SHA1 SHA512

Malware Config

Signatures

  • RMS

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

  • ACProtect 1.3x - 1.4x DLL software 2 IoCs

    Detects file using ACProtect software.

  • ASPack v2.12-2.42 9 IoCs

    Detects executables packed with ASPack v2.12-2.42

  • Executes dropped EXE 7 IoCs
  • UPX packed file 2 IoCs

    Detects executables packed with UPX/modified UPX open source packer.

  • Checks computer location settings 2 TTPs 3 IoCs

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

  • Drops file in Program Files directory 20 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Checks processor information in registry 2 TTPs 3 IoCs

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

  • Delays execution with timeout.exe 1 IoCs
  • Enumerates system info in registry 2 TTPs 3 IoCs
  • Kills process with taskkill 2 IoCs
  • Modifies registry class 2 IoCs
  • Runs .reg file with regedit 1 IoCs
  • Suspicious behavior: AddClipboardFormatListener 2 IoCs
  • Suspicious behavior: EnumeratesProcesses 18 IoCs
  • Suspicious behavior: SetClipboardViewer 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 7 IoCs
  • Suspicious use of SetWindowsHookEx 11 IoCs
  • Suspicious use of WriteProcessMemory 41 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\bc3758b4698a77d9126ad97c6bf695e2cfeb8b1ced85a948f24e7895c635ae44.exe
    "C:\Users\Admin\AppData\Local\Temp\bc3758b4698a77d9126ad97c6bf695e2cfeb8b1ced85a948f24e7895c635ae44.exe"
    1⤵
    • Checks computer location settings
    • Drops file in Program Files directory
    • Modifies registry class
    • Suspicious use of WriteProcessMemory
    PID:1280
    • C:\Windows\SysWOW64\WScript.exe
      "C:\Windows\System32\WScript.exe" "C:\Program Files\word\install.vbs"
      2⤵
      • Checks computer location settings
      • Suspicious use of WriteProcessMemory
      PID:4816
      • C:\Windows\SysWOW64\cmd.exe
        C:\Windows\system32\cmd.exe /c ""C:\Program Files\word\install.bat" "
        3⤵
        • Checks computer location settings
        • Modifies registry class
        • Suspicious use of WriteProcessMemory
        PID:2076
        • C:\Windows\SysWOW64\taskkill.exe
          taskkill /f /im rutserv.exe
          4⤵
          • Kills process with taskkill
          • Suspicious use of AdjustPrivilegeToken
          PID:4924
        • C:\Windows\SysWOW64\taskkill.exe
          taskkill /f /im rfusclient.exe
          4⤵
          • Kills process with taskkill
          • Suspicious use of AdjustPrivilegeToken
          PID:4320
        • C:\Windows\SysWOW64\reg.exe
          reg delete "HKLM\SYSTEM\Remote Manipulator System" /f
          4⤵
            PID:2556
          • C:\Windows\SysWOW64\regedit.exe
            regedit /s "regedit.reg"
            4⤵
            • Runs .reg file with regedit
            PID:2548
          • C:\Windows\SysWOW64\timeout.exe
            timeout 2
            4⤵
            • Delays execution with timeout.exe
            PID:4460
          • C:\Program Files\word\rutserv.exe
            rutserv.exe /silentinstall
            4⤵
            • Executes dropped EXE
            • Suspicious behavior: EnumeratesProcesses
            • Suspicious use of AdjustPrivilegeToken
            • Suspicious use of SetWindowsHookEx
            PID:4800
          • C:\Program Files\word\rutserv.exe
            rutserv.exe /firewall
            4⤵
            • Executes dropped EXE
            • Suspicious behavior: EnumeratesProcesses
            • Suspicious use of SetWindowsHookEx
            PID:4776
          • C:\Program Files\word\rutserv.exe
            rutserv.exe /start
            4⤵
            • Executes dropped EXE
            • Suspicious behavior: EnumeratesProcesses
            • Suspicious use of AdjustPrivilegeToken
            • Suspicious use of SetWindowsHookEx
            PID:2204
          • C:\Program Files\Microsoft Office\Root\Office16\WINWORD.EXE
            "C:\Program Files\Microsoft Office\Root\Office16\WINWORD.EXE" /n "C:\Program Files\word\1.doc" /o ""
            4⤵
            • Drops file in Program Files directory
            • Checks processor information in registry
            • Enumerates system info in registry
            • Suspicious behavior: AddClipboardFormatListener
            • Suspicious use of SetWindowsHookEx
            PID:3600
    • C:\Program Files\word\rutserv.exe
      "C:\Program Files\word\rutserv.exe"
      1⤵
      • Executes dropped EXE
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of SetWindowsHookEx
      • Suspicious use of WriteProcessMemory
      PID:4972
      • C:\Program Files\word\rfusclient.exe
        "C:\Program Files\word\rfusclient.exe" /tray
        2⤵
        • Executes dropped EXE
        PID:3260
      • C:\Program Files\word\rfusclient.exe
        "C:\Program Files\word\rfusclient.exe"
        2⤵
        • Executes dropped EXE
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of WriteProcessMemory
        PID:3120
        • C:\Program Files\word\rfusclient.exe
          "C:\Program Files\word\rfusclient.exe" /tray
          3⤵
          • Executes dropped EXE
          • Suspicious behavior: SetClipboardViewer
          PID:3208

    Network

          MITRE ATT&CK Enterprise v6

          Replay Monitor

          Loading Replay Monitor...

          Downloads

          1.doc

          • Path C:\Program Files\word\1.doc
          • Size 49KB
          • SHA256 9585e54a4d46e70491c8098d9abeaeb470a12a2a45e1bfd00100d28d79df61c4
          • MD5 SHA1 SHA512 SSDEEP

          install.bat

          • Path C:\Program Files\word\install.bat
          • Size 304B
          • SHA256 0506dec7ee56d3e967dba45fa02e410a9c79530878244c2b23e6599ec7ff6bfd
          • MD5 SHA1 SHA512

          install.vbs

          • Path C:\Program Files\word\install.vbs
          • Size 117B
          • SHA256 a7b067e9e4d44efe579c7cdb1e847d61af2323d3d73c6fffb22e178ae476f420
          • MD5 SHA1 SHA512

          regedit.reg

          • Path C:\Program Files\word\regedit.reg
          • Size 11KB
          • SHA256 7a1071e0068f10191ff416c9133f133d63a56de1fc3c62baa4e57e3acecd7fa6
          • MD5 SHA1 SHA512 SSDEEP

          rfusclient.exe

          • Path C:\Program Files\word\rfusclient.exe
          • Size 1.5MB
          • SHA256 dc9d875e659421a51addd8e8a362c926369e84320ab0c5d8bbb1e4d12d372fc9
          • MD5 SHA1 SHA512 SSDEEP

          rfusclient.exe

          • Path C:\Program Files\word\rfusclient.exe
          • Size 1.5MB
          • SHA256 dc9d875e659421a51addd8e8a362c926369e84320ab0c5d8bbb1e4d12d372fc9
          • MD5 SHA1 SHA512 SSDEEP

          rfusclient.exe

          • Path C:\Program Files\word\rfusclient.exe
          • Size 1.5MB
          • SHA256 dc9d875e659421a51addd8e8a362c926369e84320ab0c5d8bbb1e4d12d372fc9
          • MD5 SHA1 SHA512 SSDEEP

          rfusclient.exe

          • Path C:\Program Files\word\rfusclient.exe
          • Size 1.5MB
          • SHA256 dc9d875e659421a51addd8e8a362c926369e84320ab0c5d8bbb1e4d12d372fc9
          • MD5 SHA1 SHA512 SSDEEP

          rutserv.exe

          • Path C:\Program Files\word\rutserv.exe
          • Size 1.7MB
          • SHA256 1699b9b4fc1724f9b0918b57ca58c453829a3935efd89bd4e9fa66b5e9f2b8a6
          • MD5 SHA1 SHA512 SSDEEP

          rutserv.exe

          • Path C:\Program Files\word\rutserv.exe
          • Size 1.7MB
          • SHA256 1699b9b4fc1724f9b0918b57ca58c453829a3935efd89bd4e9fa66b5e9f2b8a6
          • MD5 SHA1 SHA512 SSDEEP

          rutserv.exe

          • Path C:\Program Files\word\rutserv.exe
          • Size 1.7MB
          • SHA256 1699b9b4fc1724f9b0918b57ca58c453829a3935efd89bd4e9fa66b5e9f2b8a6
          • MD5 SHA1 SHA512 SSDEEP

          rutserv.exe

          • Path C:\Program Files\word\rutserv.exe
          • Size 1.7MB
          • SHA256 1699b9b4fc1724f9b0918b57ca58c453829a3935efd89bd4e9fa66b5e9f2b8a6
          • MD5 SHA1 SHA512 SSDEEP

          rutserv.exe

          • Path C:\Program Files\word\rutserv.exe
          • Size 1.7MB
          • SHA256 1699b9b4fc1724f9b0918b57ca58c453829a3935efd89bd4e9fa66b5e9f2b8a6
          • MD5 SHA1 SHA512 SSDEEP

          vp8decoder.dll

          • Path C:\Program Files\word\vp8decoder.dll
          • Size 155KB
          • SHA256 4c04d7968a9fe9d9258968d3a722263334bbf5f8af972f206a71f17fa293aa74
          • MD5 SHA1 SHA512 SSDEEP

          vp8encoder.dll

          • Path C:\Program Files\word\vp8encoder.dll
          • Size 593KB
          • SHA256 81af82019d9f45a697a8ca1788f2c5c0205af9892efd94879dedf4bc06db4172
          • MD5 SHA1 SHA512 SSDEEP

          memory/2204-163-0x0000000000400000-0x0000000000AB9000-memory.dmp

          memory/2204-179-0x0000000000400000-0x0000000000AB9000-memory.dmp

          memory/2204-162-0x0000000000400000-0x0000000000AB9000-memory.dmp

          memory/2204-161-0x0000000000400000-0x0000000000AB9000-memory.dmp

          memory/2204-160-0x0000000000400000-0x0000000000AB9000-memory.dmp

          memory/2204-159-0x0000000000400000-0x0000000000AB9000-memory.dmp

          memory/3120-188-0x0000000000400000-0x00000000009B6000-memory.dmp

          memory/3120-184-0x0000000000400000-0x00000000009B6000-memory.dmp

          memory/3120-185-0x0000000000400000-0x00000000009B6000-memory.dmp

          memory/3120-189-0x0000000000400000-0x00000000009B6000-memory.dmp

          memory/3120-182-0x0000000000400000-0x00000000009B6000-memory.dmp

          memory/3208-200-0x0000000000400000-0x00000000009B6000-memory.dmp

          memory/3208-204-0x0000000000400000-0x00000000009B6000-memory.dmp

          memory/3208-199-0x0000000000400000-0x00000000009B6000-memory.dmp

          memory/3208-201-0x0000000000400000-0x00000000009B6000-memory.dmp

          memory/3208-202-0x0000000000400000-0x00000000009B6000-memory.dmp

          memory/3208-203-0x0000000000400000-0x00000000009B6000-memory.dmp

          memory/3260-180-0x0000000000400000-0x00000000009B6000-memory.dmp

          memory/3260-176-0x0000000000400000-0x00000000009B6000-memory.dmp

          memory/3260-178-0x0000000000400000-0x00000000009B6000-memory.dmp

          memory/3260-183-0x0000000000400000-0x00000000009B6000-memory.dmp

          memory/3260-181-0x0000000000400000-0x00000000009B6000-memory.dmp

          memory/3600-191-0x00007FFEAAFB0000-0x00007FFEAAFC0000-memory.dmp

          memory/3600-194-0x00007FFEAAFB0000-0x00007FFEAAFC0000-memory.dmp

          memory/3600-210-0x00007FFEAAFB0000-0x00007FFEAAFC0000-memory.dmp

          memory/3600-209-0x00007FFEAAFB0000-0x00007FFEAAFC0000-memory.dmp

          memory/3600-208-0x00007FFEAAFB0000-0x00007FFEAAFC0000-memory.dmp

          memory/3600-207-0x00007FFEAAFB0000-0x00007FFEAAFC0000-memory.dmp

          memory/3600-190-0x00007FFEAAFB0000-0x00007FFEAAFC0000-memory.dmp

          memory/3600-196-0x00007FFEA8960000-0x00007FFEA8970000-memory.dmp

          memory/3600-195-0x00007FFEA8960000-0x00007FFEA8970000-memory.dmp

          memory/3600-192-0x00007FFEAAFB0000-0x00007FFEAAFC0000-memory.dmp

          memory/3600-193-0x00007FFEAAFB0000-0x00007FFEAAFC0000-memory.dmp

          memory/4776-153-0x0000000000400000-0x0000000000AB9000-memory.dmp

          memory/4776-154-0x0000000000400000-0x0000000000AB9000-memory.dmp

          memory/4776-156-0x0000000000400000-0x0000000000AB9000-memory.dmp

          memory/4776-155-0x0000000000400000-0x0000000000AB9000-memory.dmp

          memory/4776-151-0x0000000000400000-0x0000000000AB9000-memory.dmp

          memory/4776-152-0x0000000000400000-0x0000000000AB9000-memory.dmp

          memory/4800-144-0x0000000000400000-0x0000000000AB9000-memory.dmp

          memory/4800-148-0x0000000000400000-0x0000000000AB9000-memory.dmp

          memory/4800-146-0x0000000000400000-0x0000000000AB9000-memory.dmp

          memory/4800-145-0x0000000000400000-0x0000000000AB9000-memory.dmp

          memory/4800-147-0x0000000000400000-0x0000000000AB9000-memory.dmp

          memory/4800-143-0x0000000000400000-0x0000000000AB9000-memory.dmp

          memory/4972-169-0x0000000000400000-0x0000000000AB9000-memory.dmp

          memory/4972-205-0x0000000000400000-0x0000000000AB9000-memory.dmp

          memory/4972-165-0x0000000000400000-0x0000000000AB9000-memory.dmp

          memory/4972-166-0x0000000000400000-0x0000000000AB9000-memory.dmp

          memory/4972-167-0x0000000000400000-0x0000000000AB9000-memory.dmp

          memory/4972-168-0x0000000000400000-0x0000000000AB9000-memory.dmp