Analysis

  • max time kernel
    150s
  • max time network
    156s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220414-en
  • submitted
    24-05-2022 14:48

General

  • Target

    027961bbc5f4cf5e52258528cd36ef50e7289d4874fb761486426f5dbd980cd8.exe

  • Size

    4.9MB

  • MD5

    edc66358fbfd4fed0b446f67a229be63

  • SHA1

    9459061611df5469510e0b8b9790cb87fd5abeaf

  • SHA256

    027961bbc5f4cf5e52258528cd36ef50e7289d4874fb761486426f5dbd980cd8

  • SHA512

    52d05eef4c8810c14b393b91e677853e795053bde8f2acad005257260482dafe0cbdf52874da8d0f5a6df4e107758ac0fd4b8ad6f94b79d5a607d52152bba32e

Malware Config

Signatures

  • Modifies WinLogon for persistence 2 TTPs 2 IoCs
  • RMS

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

  • Executes dropped EXE 8 IoCs
  • UPX packed file 9 IoCs

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

  • 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 3 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 behavior: SetClipboardViewer 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 5 IoCs
  • Suspicious use of SetWindowsHookEx 4 IoCs
  • Suspicious use of WriteProcessMemory 30 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\027961bbc5f4cf5e52258528cd36ef50e7289d4874fb761486426f5dbd980cd8.exe
    "C:\Users\Admin\AppData\Local\Temp\027961bbc5f4cf5e52258528cd36ef50e7289d4874fb761486426f5dbd980cd8.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:2000
    • 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 behavior: EnumeratesProcesses
      • Suspicious use of WriteProcessMemory
      PID:808
      • C:\Windows\SysWOW64\regedit.exe
        "C:\Windows\System32\regedit.exe" /s "C:\Windows\Zont911\Regedit.reg"
        3⤵
        • Runs .reg file with regedit
        PID:1920
      • C:\Windows\SysWOW64\cmd.exe
        C:\Windows\system32\cmd.exe /c ""C:\Windows\Zont911\Tupe.bat" "
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:2844
        • C:\Windows\SysWOW64\chcp.com
          Chcp 1251
          4⤵
            PID:4380
          • C:\Windows\System64\rutserv.exe
            "C:\Windows\System64\rutserv.exe" /silentinstall
            4⤵
            • Executes dropped EXE
            • Suspicious use of AdjustPrivilegeToken
            • Suspicious use of SetWindowsHookEx
            PID:4772
          • C:\Windows\System64\rutserv.exe
            "C:\Windows\System64\rutserv.exe" /firewall
            4⤵
            • Executes dropped EXE
            • Suspicious use of SetWindowsHookEx
            PID:2504
          • C:\Windows\System64\rutserv.exe
            "C:\Windows\System64\rutserv.exe" /start
            4⤵
            • Executes dropped EXE
            • Suspicious use of AdjustPrivilegeToken
            • Suspicious use of SetWindowsHookEx
            PID:3960
    • C:\Windows\System64\rutserv.exe
      C:\Windows\System64\rutserv.exe
      1⤵
      • Executes dropped EXE
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of SetWindowsHookEx
      • Suspicious use of WriteProcessMemory
      PID:4548
      • C:\Windows\System64\rfusclient.exe
        C:\Windows\System64\rfusclient.exe /tray
        2⤵
        • Executes dropped EXE
        PID:1708
      • C:\Windows\System64\rfusclient.exe
        C:\Windows\System64\rfusclient.exe
        2⤵
        • Executes dropped EXE
        • Suspicious use of WriteProcessMemory
        PID:2448
        • C:\Windows\System64\rfusclient.exe
          C:\Windows\System64\rfusclient.exe /tray
          3⤵
          • Executes dropped EXE
          • Suspicious behavior: SetClipboardViewer
          PID:2176

    Network

    MITRE ATT&CK Enterprise v6

    Replay Monitor

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    Downloads

    • C:\Windows\System64\1rfusclient.exe

      Filesize

      4.9MB

      MD5

      edc66358fbfd4fed0b446f67a229be63

      SHA1

      9459061611df5469510e0b8b9790cb87fd5abeaf

      SHA256

      027961bbc5f4cf5e52258528cd36ef50e7289d4874fb761486426f5dbd980cd8

      SHA512

      52d05eef4c8810c14b393b91e677853e795053bde8f2acad005257260482dafe0cbdf52874da8d0f5a6df4e107758ac0fd4b8ad6f94b79d5a607d52152bba32e

    • C:\Windows\System64\1rfusclient.exe

      Filesize

      4.9MB

      MD5

      edc66358fbfd4fed0b446f67a229be63

      SHA1

      9459061611df5469510e0b8b9790cb87fd5abeaf

      SHA256

      027961bbc5f4cf5e52258528cd36ef50e7289d4874fb761486426f5dbd980cd8

      SHA512

      52d05eef4c8810c14b393b91e677853e795053bde8f2acad005257260482dafe0cbdf52874da8d0f5a6df4e107758ac0fd4b8ad6f94b79d5a607d52152bba32e

    • C:\Windows\System64\rfusclient.exe

      Filesize

      1.5MB

      MD5

      eac85a4a79a168cb47c0810e23e6d2fe

      SHA1

      0e053ed568dc2f07d76b0e006a9e19655797b89e

      SHA256

      86b9593479937ca7dfe9ef6744cc321808c0585b63312cb50952f709c498096f

      SHA512

      b424136d58d266ba045a2ad95efeb8cdc69d77a9442521bf196390b934a7752bf728daeaf2fb3df887abf9c719a2526a8179e368cb228603b9243e3c7148c8e0

    • C:\Windows\System64\rfusclient.exe

      Filesize

      1.5MB

      MD5

      eac85a4a79a168cb47c0810e23e6d2fe

      SHA1

      0e053ed568dc2f07d76b0e006a9e19655797b89e

      SHA256

      86b9593479937ca7dfe9ef6744cc321808c0585b63312cb50952f709c498096f

      SHA512

      b424136d58d266ba045a2ad95efeb8cdc69d77a9442521bf196390b934a7752bf728daeaf2fb3df887abf9c719a2526a8179e368cb228603b9243e3c7148c8e0

    • C:\Windows\System64\rfusclient.exe

      Filesize

      1.5MB

      MD5

      eac85a4a79a168cb47c0810e23e6d2fe

      SHA1

      0e053ed568dc2f07d76b0e006a9e19655797b89e

      SHA256

      86b9593479937ca7dfe9ef6744cc321808c0585b63312cb50952f709c498096f

      SHA512

      b424136d58d266ba045a2ad95efeb8cdc69d77a9442521bf196390b934a7752bf728daeaf2fb3df887abf9c719a2526a8179e368cb228603b9243e3c7148c8e0

    • C:\Windows\System64\rfusclient.exe

      Filesize

      1.5MB

      MD5

      eac85a4a79a168cb47c0810e23e6d2fe

      SHA1

      0e053ed568dc2f07d76b0e006a9e19655797b89e

      SHA256

      86b9593479937ca7dfe9ef6744cc321808c0585b63312cb50952f709c498096f

      SHA512

      b424136d58d266ba045a2ad95efeb8cdc69d77a9442521bf196390b934a7752bf728daeaf2fb3df887abf9c719a2526a8179e368cb228603b9243e3c7148c8e0

    • C:\Windows\System64\rutserv.exe

      Filesize

      1.8MB

      MD5

      fa4b26c53cfb2661ba072cf8da181b1a

      SHA1

      295f19aad28e80c5e371078989815c612110229c

      SHA256

      3a92288781a1f411f43e59ae32ea78b89997e7a5d1b6f12771f39fb6fa345db7

      SHA512

      f6399c683c41f518a1096c87303758d50d6419e62317bfe2d362f66e5048f81583be12b32348dc095a34c0de0a79867376fdb8fc4677080d665e001b38cbfa64

    • C:\Windows\System64\rutserv.exe

      Filesize

      1.8MB

      MD5

      fa4b26c53cfb2661ba072cf8da181b1a

      SHA1

      295f19aad28e80c5e371078989815c612110229c

      SHA256

      3a92288781a1f411f43e59ae32ea78b89997e7a5d1b6f12771f39fb6fa345db7

      SHA512

      f6399c683c41f518a1096c87303758d50d6419e62317bfe2d362f66e5048f81583be12b32348dc095a34c0de0a79867376fdb8fc4677080d665e001b38cbfa64

    • C:\Windows\System64\rutserv.exe

      Filesize

      1.8MB

      MD5

      fa4b26c53cfb2661ba072cf8da181b1a

      SHA1

      295f19aad28e80c5e371078989815c612110229c

      SHA256

      3a92288781a1f411f43e59ae32ea78b89997e7a5d1b6f12771f39fb6fa345db7

      SHA512

      f6399c683c41f518a1096c87303758d50d6419e62317bfe2d362f66e5048f81583be12b32348dc095a34c0de0a79867376fdb8fc4677080d665e001b38cbfa64

    • C:\Windows\System64\rutserv.exe

      Filesize

      1.8MB

      MD5

      fa4b26c53cfb2661ba072cf8da181b1a

      SHA1

      295f19aad28e80c5e371078989815c612110229c

      SHA256

      3a92288781a1f411f43e59ae32ea78b89997e7a5d1b6f12771f39fb6fa345db7

      SHA512

      f6399c683c41f518a1096c87303758d50d6419e62317bfe2d362f66e5048f81583be12b32348dc095a34c0de0a79867376fdb8fc4677080d665e001b38cbfa64

    • C:\Windows\System64\rutserv.exe

      Filesize

      1.8MB

      MD5

      fa4b26c53cfb2661ba072cf8da181b1a

      SHA1

      295f19aad28e80c5e371078989815c612110229c

      SHA256

      3a92288781a1f411f43e59ae32ea78b89997e7a5d1b6f12771f39fb6fa345db7

      SHA512

      f6399c683c41f518a1096c87303758d50d6419e62317bfe2d362f66e5048f81583be12b32348dc095a34c0de0a79867376fdb8fc4677080d665e001b38cbfa64

    • C:\Windows\System64\vp8decoder.dll

      Filesize

      378KB

      MD5

      d43fa82fab5337ce20ad14650085c5d9

      SHA1

      678aa092075ff65b6815ffc2d8fdc23af8425981

      SHA256

      c022958429edd94bfe31f2eacfe24ff6b45d6f12747725c449a36116373de03b

      SHA512

      103e61a9f58df03316676a074487e50ec518479c11068df3736df139b85c7671048c65bce0ef2c55b3c50c61fde54e9e6c7d1b795aea71263ae94c91d4874e0d

    • C:\Windows\System64\vp8encoder.dll

      Filesize

      1.6MB

      MD5

      dab4646806dfca6d0e0b4d80fa9209d6

      SHA1

      8244dfe22ec2090eee89dad103e6b2002059d16a

      SHA256

      cb6ef96d3a66ef08ec2c8640b751a52d6d4f4530cf01162a69966f0fd5153587

      SHA512

      aa5eb93bf23a10de797d6fb52a55a95d36bc48927c76fedd81e0c48872745cb7f7d1b3f230eaae42fd4e79b6a59ca707e56bd6963b03644cbd5984f11e98d6e7

    • C:\Windows\Zont911\Regedit.reg

      Filesize

      11KB

      MD5

      6c375f35079dd2c3a33f417735079c81

      SHA1

      c017ccea562e62a5dbb89952867ae18595c73691

      SHA256

      2a776515deefe9f4d2a3e7cbb4e4ab6f1c534858dba34473ecb935a8ec0d6dcb

      SHA512

      0faedcaa54fe6d6cec872c71fffcb2b64408204028e7e2a6b62a4f666c10d83ed7e8e605c0e6936a8c02366ea8c86e3c794b68e6a46cdba9e25261b20bc52653

    • C:\Windows\Zont911\Tupe.bat

      Filesize

      281B

      MD5

      46b491b3846fcc6b17ffbbb598fe8ab4

      SHA1

      6cf658c9d4320230e17462a047191a76979e2d19

      SHA256

      d1f1da9a663e4bcc6ceb55f5ff11c12cfd5baa1ff915d8f901118058a3aa5801

      SHA512

      8a3796b7894d8604ba94f70277010406fba977bce598712c57dda3558589a7bcc2afabfda0b0f90c2a9e499e098cd81f0764159ca7db0f5d9c34c82917aeaa77