Analysis

  • max time kernel
    171s
  • max time network
    146s
  • platform
    windows7_x64
  • resource
    win7-en-20211208
  • submitted
    20-02-2022 02:12

General

  • Target

    c7f8289950b0d8aa97dceadf2a98aef51886710d56a5283b889c9ad191531028.dll

  • Size

    130KB

  • MD5

    1e2b8973130672a1e739b035d30155b0

  • SHA1

    b4f098806ac9060f0f4dd3d63e8d831c69be6c81

  • SHA256

    c7f8289950b0d8aa97dceadf2a98aef51886710d56a5283b889c9ad191531028

  • SHA512

    a4be4accd1f5a7ab4131b477f61565822f545cff1c89e6167de4f07fa7bb1a8204c87c7ad7a40c83ed54161f5f4e6853196bb843949222384efd561692e2c4be

Malware Config

Extracted

Path

C:\$Recycle.Bin\RyukReadMe.html

Family

ryuk

Ransom Note
contact balance of shadow universe Ryuk $password = 'BVb1qR2'; $torlink = 'http://oc6mkf4efqrjp2ue6qp6vmz4ofyjmlo6dtqiklqb2q546bnqeu66tbyd.onion'; function info(){alert("INSTRUCTION:\r\n1. Download tor browser.\r\n2. Open link through tor browser: " + $torlink + "\r\n3. Fill the form, your password: "+ $password +"\r\nWe will contact you shortly.\r\nAlways send files for test decryption.");};
URLs

http://oc6mkf4efqrjp2ue6qp6vmz4ofyjmlo6dtqiklqb2q546bnqeu66tbyd.onion

Signatures

  • Ryuk

    Ransomware distributed via existing botnets, often Trickbot or Emotet.

  • Executes dropped EXE 3 IoCs
  • Loads dropped DLL 3 IoCs
  • Modifies file permissions 1 TTPs 2 IoCs
  • Drops file in System32 directory 6 IoCs
  • Drops file in Program Files directory 2 IoCs
  • Suspicious use of WriteProcessMemory 27 IoCs

Processes

  • C:\Windows\system32\rundll32.exe
    rundll32.exe C:\Users\Admin\AppData\Local\Temp\c7f8289950b0d8aa97dceadf2a98aef51886710d56a5283b889c9ad191531028.dll,#1
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:1652
    • C:\Windows\SysWOW64\rundll32.exe
      rundll32.exe C:\Users\Admin\AppData\Local\Temp\c7f8289950b0d8aa97dceadf2a98aef51886710d56a5283b889c9ad191531028.dll,#1
      2⤵
      • Loads dropped DLL
      • Drops file in System32 directory
      • Drops file in Program Files directory
      • Suspicious use of WriteProcessMemory
      PID:1680
      • C:\Windows\SysWOW64\PFeXAUzHLrep.exe
        "C:\Windows\SysWOW64\PFeXAUzHLrep.exe" 9 REP
        3⤵
        • Executes dropped EXE
        PID:1164
      • C:\Windows\SysWOW64\UpHVkmBhClan.exe
        "C:\Windows\SysWOW64\UpHVkmBhClan.exe" 8 LAN
        3⤵
        • Executes dropped EXE
        PID:1148
      • C:\Windows\SysWOW64\oLKOhKLNOlan.exe
        "C:\Windows\SysWOW64\oLKOhKLNOlan.exe" 8 LAN
        3⤵
        • Executes dropped EXE
        PID:968
      • C:\Windows\SysWOW64\icacls.exe
        icacls "C:\*" /grant Everyone:F /T /C /Q
        3⤵
        • Modifies file permissions
        PID:1964
      • C:\Windows\SysWOW64\icacls.exe
        icacls "D:\*" /grant Everyone:F /T /C /Q
        3⤵
        • Modifies file permissions
        PID:1924

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

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Downloads

  • C:\$Recycle.Bin\RyukReadMe.html

    MD5

    98d3b55cce54a33a6648f5b02a11f65d

    SHA1

    8c0fd3cb0ab6b4bf962199b2187d0984490fa8ef

    SHA256

    807979e800f4efcf68130c5b6c5af3c333c76e8b7198419ab0a2966a84322131

    SHA512

    9e8d9707a15bdd0e6a7ee360359d01220c5fe95ff472bef0c7460c2749eb8a1a480392b426a62709838d1260a25cff8f5da512eedd61fe2485ca61f3df451a15

  • C:\$Recycle.Bin\S-1-5-21-2329389628-4064185017-3901522362-1000\RyukReadMe.html

    MD5

    98d3b55cce54a33a6648f5b02a11f65d

    SHA1

    8c0fd3cb0ab6b4bf962199b2187d0984490fa8ef

    SHA256

    807979e800f4efcf68130c5b6c5af3c333c76e8b7198419ab0a2966a84322131

    SHA512

    9e8d9707a15bdd0e6a7ee360359d01220c5fe95ff472bef0c7460c2749eb8a1a480392b426a62709838d1260a25cff8f5da512eedd61fe2485ca61f3df451a15

  • C:\MSOCache\All Users\RyukReadMe.html

    MD5

    98d3b55cce54a33a6648f5b02a11f65d

    SHA1

    8c0fd3cb0ab6b4bf962199b2187d0984490fa8ef

    SHA256

    807979e800f4efcf68130c5b6c5af3c333c76e8b7198419ab0a2966a84322131

    SHA512

    9e8d9707a15bdd0e6a7ee360359d01220c5fe95ff472bef0c7460c2749eb8a1a480392b426a62709838d1260a25cff8f5da512eedd61fe2485ca61f3df451a15

  • C:\MSOCache\All Users\{90140000-0011-0000-0000-0000000FF1CE}-C\RyukReadMe.html

    MD5

    98d3b55cce54a33a6648f5b02a11f65d

    SHA1

    8c0fd3cb0ab6b4bf962199b2187d0984490fa8ef

    SHA256

    807979e800f4efcf68130c5b6c5af3c333c76e8b7198419ab0a2966a84322131

    SHA512

    9e8d9707a15bdd0e6a7ee360359d01220c5fe95ff472bef0c7460c2749eb8a1a480392b426a62709838d1260a25cff8f5da512eedd61fe2485ca61f3df451a15

  • C:\MSOCache\All Users\{90140000-0016-0409-0000-0000000FF1CE}-C\RyukReadMe.html

    MD5

    98d3b55cce54a33a6648f5b02a11f65d

    SHA1

    8c0fd3cb0ab6b4bf962199b2187d0984490fa8ef

    SHA256

    807979e800f4efcf68130c5b6c5af3c333c76e8b7198419ab0a2966a84322131

    SHA512

    9e8d9707a15bdd0e6a7ee360359d01220c5fe95ff472bef0c7460c2749eb8a1a480392b426a62709838d1260a25cff8f5da512eedd61fe2485ca61f3df451a15

  • C:\MSOCache\All Users\{90140000-0018-0409-0000-0000000FF1CE}-C\RyukReadMe.html

    MD5

    98d3b55cce54a33a6648f5b02a11f65d

    SHA1

    8c0fd3cb0ab6b4bf962199b2187d0984490fa8ef

    SHA256

    807979e800f4efcf68130c5b6c5af3c333c76e8b7198419ab0a2966a84322131

    SHA512

    9e8d9707a15bdd0e6a7ee360359d01220c5fe95ff472bef0c7460c2749eb8a1a480392b426a62709838d1260a25cff8f5da512eedd61fe2485ca61f3df451a15

  • C:\MSOCache\All Users\{90140000-0019-0409-0000-0000000FF1CE}-C\RyukReadMe.html

    MD5

    98d3b55cce54a33a6648f5b02a11f65d

    SHA1

    8c0fd3cb0ab6b4bf962199b2187d0984490fa8ef

    SHA256

    807979e800f4efcf68130c5b6c5af3c333c76e8b7198419ab0a2966a84322131

    SHA512

    9e8d9707a15bdd0e6a7ee360359d01220c5fe95ff472bef0c7460c2749eb8a1a480392b426a62709838d1260a25cff8f5da512eedd61fe2485ca61f3df451a15

  • C:\MSOCache\All Users\{90140000-001A-0409-0000-0000000FF1CE}-C\RyukReadMe.html

    MD5

    98d3b55cce54a33a6648f5b02a11f65d

    SHA1

    8c0fd3cb0ab6b4bf962199b2187d0984490fa8ef

    SHA256

    807979e800f4efcf68130c5b6c5af3c333c76e8b7198419ab0a2966a84322131

    SHA512

    9e8d9707a15bdd0e6a7ee360359d01220c5fe95ff472bef0c7460c2749eb8a1a480392b426a62709838d1260a25cff8f5da512eedd61fe2485ca61f3df451a15

  • C:\MSOCache\All Users\{90140000-001B-0409-0000-0000000FF1CE}-C\RyukReadMe.html

    MD5

    98d3b55cce54a33a6648f5b02a11f65d

    SHA1

    8c0fd3cb0ab6b4bf962199b2187d0984490fa8ef

    SHA256

    807979e800f4efcf68130c5b6c5af3c333c76e8b7198419ab0a2966a84322131

    SHA512

    9e8d9707a15bdd0e6a7ee360359d01220c5fe95ff472bef0c7460c2749eb8a1a480392b426a62709838d1260a25cff8f5da512eedd61fe2485ca61f3df451a15

  • C:\MSOCache\All Users\{90140000-002C-0409-0000-0000000FF1CE}-C\Proof.en\RyukReadMe.html

    MD5

    98d3b55cce54a33a6648f5b02a11f65d

    SHA1

    8c0fd3cb0ab6b4bf962199b2187d0984490fa8ef

    SHA256

    807979e800f4efcf68130c5b6c5af3c333c76e8b7198419ab0a2966a84322131

    SHA512

    9e8d9707a15bdd0e6a7ee360359d01220c5fe95ff472bef0c7460c2749eb8a1a480392b426a62709838d1260a25cff8f5da512eedd61fe2485ca61f3df451a15

  • C:\MSOCache\All Users\{90140000-002C-0409-0000-0000000FF1CE}-C\Proof.es\RyukReadMe.html

    MD5

    98d3b55cce54a33a6648f5b02a11f65d

    SHA1

    8c0fd3cb0ab6b4bf962199b2187d0984490fa8ef

    SHA256

    807979e800f4efcf68130c5b6c5af3c333c76e8b7198419ab0a2966a84322131

    SHA512

    9e8d9707a15bdd0e6a7ee360359d01220c5fe95ff472bef0c7460c2749eb8a1a480392b426a62709838d1260a25cff8f5da512eedd61fe2485ca61f3df451a15

  • C:\MSOCache\All Users\{90140000-002C-0409-0000-0000000FF1CE}-C\Proof.fr\RyukReadMe.html

    MD5

    98d3b55cce54a33a6648f5b02a11f65d

    SHA1

    8c0fd3cb0ab6b4bf962199b2187d0984490fa8ef

    SHA256

    807979e800f4efcf68130c5b6c5af3c333c76e8b7198419ab0a2966a84322131

    SHA512

    9e8d9707a15bdd0e6a7ee360359d01220c5fe95ff472bef0c7460c2749eb8a1a480392b426a62709838d1260a25cff8f5da512eedd61fe2485ca61f3df451a15

  • C:\MSOCache\All Users\{90140000-002C-0409-0000-0000000FF1CE}-C\RyukReadMe.html

    MD5

    98d3b55cce54a33a6648f5b02a11f65d

    SHA1

    8c0fd3cb0ab6b4bf962199b2187d0984490fa8ef

    SHA256

    807979e800f4efcf68130c5b6c5af3c333c76e8b7198419ab0a2966a84322131

    SHA512

    9e8d9707a15bdd0e6a7ee360359d01220c5fe95ff472bef0c7460c2749eb8a1a480392b426a62709838d1260a25cff8f5da512eedd61fe2485ca61f3df451a15

  • C:\MSOCache\All Users\{90140000-0044-0409-0000-0000000FF1CE}-C\RyukReadMe.html

    MD5

    98d3b55cce54a33a6648f5b02a11f65d

    SHA1

    8c0fd3cb0ab6b4bf962199b2187d0984490fa8ef

    SHA256

    807979e800f4efcf68130c5b6c5af3c333c76e8b7198419ab0a2966a84322131

    SHA512

    9e8d9707a15bdd0e6a7ee360359d01220c5fe95ff472bef0c7460c2749eb8a1a480392b426a62709838d1260a25cff8f5da512eedd61fe2485ca61f3df451a15

  • C:\MSOCache\All Users\{90140000-00A1-0409-0000-0000000FF1CE}-C\RyukReadMe.html

    MD5

    98d3b55cce54a33a6648f5b02a11f65d

    SHA1

    8c0fd3cb0ab6b4bf962199b2187d0984490fa8ef

    SHA256

    807979e800f4efcf68130c5b6c5af3c333c76e8b7198419ab0a2966a84322131

    SHA512

    9e8d9707a15bdd0e6a7ee360359d01220c5fe95ff472bef0c7460c2749eb8a1a480392b426a62709838d1260a25cff8f5da512eedd61fe2485ca61f3df451a15

  • C:\MSOCache\All Users\{90140000-00BA-0409-0000-0000000FF1CE}-C\RyukReadMe.html

    MD5

    98d3b55cce54a33a6648f5b02a11f65d

    SHA1

    8c0fd3cb0ab6b4bf962199b2187d0984490fa8ef

    SHA256

    807979e800f4efcf68130c5b6c5af3c333c76e8b7198419ab0a2966a84322131

    SHA512

    9e8d9707a15bdd0e6a7ee360359d01220c5fe95ff472bef0c7460c2749eb8a1a480392b426a62709838d1260a25cff8f5da512eedd61fe2485ca61f3df451a15

  • C:\MSOCache\All Users\{90140000-0115-0409-0000-0000000FF1CE}-C\1033\RyukReadMe.html

    MD5

    98d3b55cce54a33a6648f5b02a11f65d

    SHA1

    8c0fd3cb0ab6b4bf962199b2187d0984490fa8ef

    SHA256

    807979e800f4efcf68130c5b6c5af3c333c76e8b7198419ab0a2966a84322131

    SHA512

    9e8d9707a15bdd0e6a7ee360359d01220c5fe95ff472bef0c7460c2749eb8a1a480392b426a62709838d1260a25cff8f5da512eedd61fe2485ca61f3df451a15

  • C:\MSOCache\All Users\{90140000-0115-0409-0000-0000000FF1CE}-C\RyukReadMe.html

    MD5

    98d3b55cce54a33a6648f5b02a11f65d

    SHA1

    8c0fd3cb0ab6b4bf962199b2187d0984490fa8ef

    SHA256

    807979e800f4efcf68130c5b6c5af3c333c76e8b7198419ab0a2966a84322131

    SHA512

    9e8d9707a15bdd0e6a7ee360359d01220c5fe95ff472bef0c7460c2749eb8a1a480392b426a62709838d1260a25cff8f5da512eedd61fe2485ca61f3df451a15

  • C:\MSOCache\All Users\{90140000-0116-0409-1000-0000000FF1CE}-C\RyukReadMe.html

    MD5

    98d3b55cce54a33a6648f5b02a11f65d

    SHA1

    8c0fd3cb0ab6b4bf962199b2187d0984490fa8ef

    SHA256

    807979e800f4efcf68130c5b6c5af3c333c76e8b7198419ab0a2966a84322131

    SHA512

    9e8d9707a15bdd0e6a7ee360359d01220c5fe95ff472bef0c7460c2749eb8a1a480392b426a62709838d1260a25cff8f5da512eedd61fe2485ca61f3df451a15

  • C:\MSOCache\All Users\{90140000-0117-0409-0000-0000000FF1CE}-C\RyukReadMe.html

    MD5

    98d3b55cce54a33a6648f5b02a11f65d

    SHA1

    8c0fd3cb0ab6b4bf962199b2187d0984490fa8ef

    SHA256

    807979e800f4efcf68130c5b6c5af3c333c76e8b7198419ab0a2966a84322131

    SHA512

    9e8d9707a15bdd0e6a7ee360359d01220c5fe95ff472bef0c7460c2749eb8a1a480392b426a62709838d1260a25cff8f5da512eedd61fe2485ca61f3df451a15

  • C:\MSOCache\RyukReadMe.html

    MD5

    98d3b55cce54a33a6648f5b02a11f65d

    SHA1

    8c0fd3cb0ab6b4bf962199b2187d0984490fa8ef

    SHA256

    807979e800f4efcf68130c5b6c5af3c333c76e8b7198419ab0a2966a84322131

    SHA512

    9e8d9707a15bdd0e6a7ee360359d01220c5fe95ff472bef0c7460c2749eb8a1a480392b426a62709838d1260a25cff8f5da512eedd61fe2485ca61f3df451a15

  • C:\PerfLogs\RyukReadMe.html

    MD5

    98d3b55cce54a33a6648f5b02a11f65d

    SHA1

    8c0fd3cb0ab6b4bf962199b2187d0984490fa8ef

    SHA256

    807979e800f4efcf68130c5b6c5af3c333c76e8b7198419ab0a2966a84322131

    SHA512

    9e8d9707a15bdd0e6a7ee360359d01220c5fe95ff472bef0c7460c2749eb8a1a480392b426a62709838d1260a25cff8f5da512eedd61fe2485ca61f3df451a15

  • C:\RyukReadMe.html

    MD5

    98d3b55cce54a33a6648f5b02a11f65d

    SHA1

    8c0fd3cb0ab6b4bf962199b2187d0984490fa8ef

    SHA256

    807979e800f4efcf68130c5b6c5af3c333c76e8b7198419ab0a2966a84322131

    SHA512

    9e8d9707a15bdd0e6a7ee360359d01220c5fe95ff472bef0c7460c2749eb8a1a480392b426a62709838d1260a25cff8f5da512eedd61fe2485ca61f3df451a15

  • C:\Users\Admin\AppData\Local\Temp\RyukReadMe.html

    MD5

    98d3b55cce54a33a6648f5b02a11f65d

    SHA1

    8c0fd3cb0ab6b4bf962199b2187d0984490fa8ef

    SHA256

    807979e800f4efcf68130c5b6c5af3c333c76e8b7198419ab0a2966a84322131

    SHA512

    9e8d9707a15bdd0e6a7ee360359d01220c5fe95ff472bef0c7460c2749eb8a1a480392b426a62709838d1260a25cff8f5da512eedd61fe2485ca61f3df451a15

  • C:\Users\Public\RyukReadMe.html

    MD5

    98d3b55cce54a33a6648f5b02a11f65d

    SHA1

    8c0fd3cb0ab6b4bf962199b2187d0984490fa8ef

    SHA256

    807979e800f4efcf68130c5b6c5af3c333c76e8b7198419ab0a2966a84322131

    SHA512

    9e8d9707a15bdd0e6a7ee360359d01220c5fe95ff472bef0c7460c2749eb8a1a480392b426a62709838d1260a25cff8f5da512eedd61fe2485ca61f3df451a15

  • C:\Users\RyukReadMe.html

    MD5

    98d3b55cce54a33a6648f5b02a11f65d

    SHA1

    8c0fd3cb0ab6b4bf962199b2187d0984490fa8ef

    SHA256

    807979e800f4efcf68130c5b6c5af3c333c76e8b7198419ab0a2966a84322131

    SHA512

    9e8d9707a15bdd0e6a7ee360359d01220c5fe95ff472bef0c7460c2749eb8a1a480392b426a62709838d1260a25cff8f5da512eedd61fe2485ca61f3df451a15

  • C:\Windows\SysWOW64\PFeXAUzHLrep.exe

    MD5

    51138beea3e2c21ec44d0932c71762a8

    SHA1

    8939cf35447b22dd2c6e6f443446acc1bf986d58

    SHA256

    5ad3c37e6f2b9db3ee8b5aeedc474645de90c66e3d95f8620c48102f1eba4124

    SHA512

    794f30fe452117ff2a26dc9d7086aaf82b639c2632ac2e381a81f5239caaec7c96922ba5d2d90bfd8d74f0a6cd4f79fbda63e14c6b779e5cf6834c13e4e45e7d

  • C:\Windows\SysWOW64\UpHVkmBhClan.exe

    MD5

    51138beea3e2c21ec44d0932c71762a8

    SHA1

    8939cf35447b22dd2c6e6f443446acc1bf986d58

    SHA256

    5ad3c37e6f2b9db3ee8b5aeedc474645de90c66e3d95f8620c48102f1eba4124

    SHA512

    794f30fe452117ff2a26dc9d7086aaf82b639c2632ac2e381a81f5239caaec7c96922ba5d2d90bfd8d74f0a6cd4f79fbda63e14c6b779e5cf6834c13e4e45e7d

  • C:\Windows\SysWOW64\oLKOhKLNOlan.exe

    MD5

    51138beea3e2c21ec44d0932c71762a8

    SHA1

    8939cf35447b22dd2c6e6f443446acc1bf986d58

    SHA256

    5ad3c37e6f2b9db3ee8b5aeedc474645de90c66e3d95f8620c48102f1eba4124

    SHA512

    794f30fe452117ff2a26dc9d7086aaf82b639c2632ac2e381a81f5239caaec7c96922ba5d2d90bfd8d74f0a6cd4f79fbda63e14c6b779e5cf6834c13e4e45e7d

  • \Windows\SysWOW64\PFeXAUzHLrep.exe

    MD5

    51138beea3e2c21ec44d0932c71762a8

    SHA1

    8939cf35447b22dd2c6e6f443446acc1bf986d58

    SHA256

    5ad3c37e6f2b9db3ee8b5aeedc474645de90c66e3d95f8620c48102f1eba4124

    SHA512

    794f30fe452117ff2a26dc9d7086aaf82b639c2632ac2e381a81f5239caaec7c96922ba5d2d90bfd8d74f0a6cd4f79fbda63e14c6b779e5cf6834c13e4e45e7d

  • \Windows\SysWOW64\UpHVkmBhClan.exe

    MD5

    51138beea3e2c21ec44d0932c71762a8

    SHA1

    8939cf35447b22dd2c6e6f443446acc1bf986d58

    SHA256

    5ad3c37e6f2b9db3ee8b5aeedc474645de90c66e3d95f8620c48102f1eba4124

    SHA512

    794f30fe452117ff2a26dc9d7086aaf82b639c2632ac2e381a81f5239caaec7c96922ba5d2d90bfd8d74f0a6cd4f79fbda63e14c6b779e5cf6834c13e4e45e7d

  • \Windows\SysWOW64\oLKOhKLNOlan.exe

    MD5

    51138beea3e2c21ec44d0932c71762a8

    SHA1

    8939cf35447b22dd2c6e6f443446acc1bf986d58

    SHA256

    5ad3c37e6f2b9db3ee8b5aeedc474645de90c66e3d95f8620c48102f1eba4124

    SHA512

    794f30fe452117ff2a26dc9d7086aaf82b639c2632ac2e381a81f5239caaec7c96922ba5d2d90bfd8d74f0a6cd4f79fbda63e14c6b779e5cf6834c13e4e45e7d

  • memory/1680-55-0x0000000074EC1000-0x0000000074EC3000-memory.dmp

    Filesize

    8KB

  • memory/1680-56-0x0000000035000000-0x0000000035028000-memory.dmp

    Filesize

    160KB