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Analysis

  • max time kernel
    150s
  • max time network
    148s
  • platform
    windows7_x64
  • resource
    win7-20220414-en
  • submitted
    24/05/2022, 15:48

General

  • Target

    94c85f4f20b93646b67768ac6ec85ed729e9de0e334a69dec4f821b95b8a1f41.exe

  • Size

    4.9MB

  • MD5

    b741d9eaaa2f68f9370b52ac5e598554

  • SHA1

    e90bebf43fbedac0aa78fa92ca927b5a81d10983

  • SHA256

    94c85f4f20b93646b67768ac6ec85ed729e9de0e334a69dec4f821b95b8a1f41

  • SHA512

    8bf8cef7e79f3b75a25031fe720a5d14f1d16cfbbf049aa16700172970a2312bfac378aa2a5f6fb376c1dfa946fff7fa3698c4a8d7f1a4fd761d0d815280004c

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 8 IoCs
  • Sets file to hidden 1 TTPs

    Modifies file attributes to stop it showing in Explorer etc.

  • UPX packed file 12 IoCs

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

  • Loads dropped DLL 5 IoCs
  • Adds Run key to start application 2 TTPs 2 IoCs
  • Drops file in Windows directory 24 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 5 IoCs
  • Suspicious use of SetWindowsHookEx 4 IoCs
  • Suspicious use of WriteProcessMemory 48 IoCs
  • Views/modifies file attributes 1 TTPs 2 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\94c85f4f20b93646b67768ac6ec85ed729e9de0e334a69dec4f821b95b8a1f41.exe
    "C:\Users\Admin\AppData\Local\Temp\94c85f4f20b93646b67768ac6ec85ed729e9de0e334a69dec4f821b95b8a1f41.exe"
    1⤵
    • Modifies WinLogon for persistence
    • Loads dropped DLL
    • Adds Run key to start application
    • Drops file in Windows directory
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of WriteProcessMemory
    PID:1100
    • C:\Windows\System64\1svnhost.exe
      "C:\Windows\System64\1svnhost.exe"
      2⤵
      • Modifies WinLogon for persistence
      • Executes dropped EXE
      • Loads dropped DLL
      • Adds Run key to start application
      • Drops file in Windows directory
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of WriteProcessMemory
      PID:1952
      • C:\Windows\SysWOW64\regedit.exe
        "C:\Windows\System32\regedit.exe" /s "C:\Windows\Zont911\Regedit.reg"
        3⤵
        • Runs .reg file with regedit
        PID:1180
      • C:\Windows\SysWOW64\cmd.exe
        cmd /c ""C:\Windows\Zont911\Tupe.bat" "
        3⤵
        • Loads dropped DLL
        • Drops file in Windows directory
        • Suspicious use of WriteProcessMemory
        PID:2032
        • C:\Windows\SysWOW64\chcp.com
          Chcp 1251
          4⤵
            PID:1988
          • C:\Windows\System64\rutserv.exe
            "C:\Windows\System64\rutserv.exe" /silentinstall
            4⤵
            • Executes dropped EXE
            • Suspicious use of AdjustPrivilegeToken
            • Suspicious use of SetWindowsHookEx
            PID:1812
          • C:\Windows\System64\rutserv.exe
            "C:\Windows\System64\rutserv.exe" /firewall
            4⤵
            • Executes dropped EXE
            • Suspicious use of SetWindowsHookEx
            PID:1700
          • C:\Windows\System64\rutserv.exe
            "C:\Windows\System64\rutserv.exe" /start
            4⤵
            • Executes dropped EXE
            • Suspicious use of AdjustPrivilegeToken
            • Suspicious use of SetWindowsHookEx
            PID:1128
          • C:\Windows\SysWOW64\attrib.exe
            attrib "C:\Windows\System64\*.*" +s +h
            4⤵
            • Drops file in Windows directory
            • Views/modifies file attributes
            PID:792
          • C:\Windows\SysWOW64\attrib.exe
            attrib "C:\Windows\System64" +s +h
            4⤵
            • Drops file in Windows directory
            • Views/modifies file attributes
            PID:1412
        • C:\Windows\System64\rfusclient.exe
          "C:\Windows\System64\rfusclient.exe"
          3⤵
          • Executes dropped EXE
          PID:1964
    • C:\Windows\System64\rutserv.exe
      C:\Windows\System64\rutserv.exe
      1⤵
      • Executes dropped EXE
      • Drops file in Windows directory
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of SetWindowsHookEx
      • Suspicious use of WriteProcessMemory
      PID:1204
      • C:\Windows\System64\rfusclient.exe
        C:\Windows\System64\rfusclient.exe
        2⤵
        • Executes dropped EXE
        PID:368
      • C:\Windows\System64\rfusclient.exe
        C:\Windows\System64\rfusclient.exe /tray
        2⤵
        • Executes dropped EXE
        PID:1940

    Network

    MITRE ATT&CK Enterprise v6

    Replay Monitor

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    Downloads

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

      Filesize

      4.9MB

      MD5

      b741d9eaaa2f68f9370b52ac5e598554

      SHA1

      e90bebf43fbedac0aa78fa92ca927b5a81d10983

      SHA256

      94c85f4f20b93646b67768ac6ec85ed729e9de0e334a69dec4f821b95b8a1f41

      SHA512

      8bf8cef7e79f3b75a25031fe720a5d14f1d16cfbbf049aa16700172970a2312bfac378aa2a5f6fb376c1dfa946fff7fa3698c4a8d7f1a4fd761d0d815280004c

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

      Filesize

      4.9MB

      MD5

      b741d9eaaa2f68f9370b52ac5e598554

      SHA1

      e90bebf43fbedac0aa78fa92ca927b5a81d10983

      SHA256

      94c85f4f20b93646b67768ac6ec85ed729e9de0e334a69dec4f821b95b8a1f41

      SHA512

      8bf8cef7e79f3b75a25031fe720a5d14f1d16cfbbf049aa16700172970a2312bfac378aa2a5f6fb376c1dfa946fff7fa3698c4a8d7f1a4fd761d0d815280004c

    • 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\svnhost.exe

      Filesize

      1.5MB

      MD5

      eac85a4a79a168cb47c0810e23e6d2fe

      SHA1

      0e053ed568dc2f07d76b0e006a9e19655797b89e

      SHA256

      86b9593479937ca7dfe9ef6744cc321808c0585b63312cb50952f709c498096f

      SHA512

      b424136d58d266ba045a2ad95efeb8cdc69d77a9442521bf196390b934a7752bf728daeaf2fb3df887abf9c719a2526a8179e368cb228603b9243e3c7148c8e0

    • 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

      9b83b48cc40a9c3698e9288cf39dff6d

      SHA1

      353d7ffa56073f403b9ec39abca2efd0e06470ae

      SHA256

      d3702d9b275c83a07be06f09630cea5961b2b2d05d6e88ce0b941ca053133e1c

      SHA512

      5edc6a7f9527ccb1508029ad3fcf5520ff25a3e2758ffc801f134396bb9fe175b168c0a24d8f80a2b009fa01496842cfe3fe99499326297f56f60c146e7df3ca

    • C:\Windows\Zont911\Tupe.bat

      Filesize

      354B

      MD5

      20189660e08a7d3363762a6bd520734b

      SHA1

      0bfaf971f7d912ea917af60cdaf24a08dc77888b

      SHA256

      b50b62fd25c96185ac760cbe850c19ac08bec36f4a06313686972f20bcbb62a6

      SHA512

      d28de0387c8a59e4f7527dd23ff961fbe5ac388ec083671238f55bdfbf5d5ba60f6cad2a8de3166afc7f6edd9310d65e28365ca429be73e9ebadd1776ca5d06a

    • \Windows\System64\1svnhost.exe

      Filesize

      4.9MB

      MD5

      b741d9eaaa2f68f9370b52ac5e598554

      SHA1

      e90bebf43fbedac0aa78fa92ca927b5a81d10983

      SHA256

      94c85f4f20b93646b67768ac6ec85ed729e9de0e334a69dec4f821b95b8a1f41

      SHA512

      8bf8cef7e79f3b75a25031fe720a5d14f1d16cfbbf049aa16700172970a2312bfac378aa2a5f6fb376c1dfa946fff7fa3698c4a8d7f1a4fd761d0d815280004c

    • \Windows\System64\1svnhost.exe

      Filesize

      4.9MB

      MD5

      b741d9eaaa2f68f9370b52ac5e598554

      SHA1

      e90bebf43fbedac0aa78fa92ca927b5a81d10983

      SHA256

      94c85f4f20b93646b67768ac6ec85ed729e9de0e334a69dec4f821b95b8a1f41

      SHA512

      8bf8cef7e79f3b75a25031fe720a5d14f1d16cfbbf049aa16700172970a2312bfac378aa2a5f6fb376c1dfa946fff7fa3698c4a8d7f1a4fd761d0d815280004c

    • \Windows\System64\1svnhost.exe

      Filesize

      4.9MB

      MD5

      b741d9eaaa2f68f9370b52ac5e598554

      SHA1

      e90bebf43fbedac0aa78fa92ca927b5a81d10983

      SHA256

      94c85f4f20b93646b67768ac6ec85ed729e9de0e334a69dec4f821b95b8a1f41

      SHA512

      8bf8cef7e79f3b75a25031fe720a5d14f1d16cfbbf049aa16700172970a2312bfac378aa2a5f6fb376c1dfa946fff7fa3698c4a8d7f1a4fd761d0d815280004c

    • \Windows\System64\rfusclient.exe

      Filesize

      1.5MB

      MD5

      eac85a4a79a168cb47c0810e23e6d2fe

      SHA1

      0e053ed568dc2f07d76b0e006a9e19655797b89e

      SHA256

      86b9593479937ca7dfe9ef6744cc321808c0585b63312cb50952f709c498096f

      SHA512

      b424136d58d266ba045a2ad95efeb8cdc69d77a9442521bf196390b934a7752bf728daeaf2fb3df887abf9c719a2526a8179e368cb228603b9243e3c7148c8e0

    • \Windows\System64\rutserv.exe

      Filesize

      1.8MB

      MD5

      fa4b26c53cfb2661ba072cf8da181b1a

      SHA1

      295f19aad28e80c5e371078989815c612110229c

      SHA256

      3a92288781a1f411f43e59ae32ea78b89997e7a5d1b6f12771f39fb6fa345db7

      SHA512

      f6399c683c41f518a1096c87303758d50d6419e62317bfe2d362f66e5048f81583be12b32348dc095a34c0de0a79867376fdb8fc4677080d665e001b38cbfa64

    • memory/1100-54-0x0000000074B51000-0x0000000074B53000-memory.dmp

      Filesize

      8KB