Overview

overview

10

Static

static

goBnh.exe

windows7_x64

10

goBnh.exe

windows10_x64

Analysis

  • max time kernel
    141s
  • max time network
    159s
  • platform
    windows7_x64
  • resource
    win7v20210408
  • submitted
    10-08-2021 10:11

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General

  • Target

    goBnh.exe

  • Size

    152KB

  • MD5

    32cbc69f85cc47d8e35dc20dfbda6948

  • SHA1

    35dd5239977c2922a06389061cca846ec09453bb

  • SHA256

    795db7bdad1befdd3ad942be79715f6b0c5083d859901b81657b590c9628790f

  • SHA512

    f485a56c783dba3c15d691709a6736d5589194ec8f54e8d01342e7d6f4c54b4a56eae0fa49e150e8a13780fcb7e2e50337c8eaa026baf51774527351b365a25c

Score
10/10
ryukransomware

Malware Config

Extracted

Path

C:\RyukReadMe.txt

Family

ryuk

Ransom Note
Your network has been penetrated. All files on each host in the network have been encrypted with a strong algorithm. Backups were either encrypted Shadow copies also removed, so F8 or any other methods may damage encrypted data but not recover. We exclusively have decryption software for your situation. More than a year ago, world experts recognized the impossibility of deciphering by any means except the original decoder. No decryption software is available in the public. Antiviruse companies, researchers, IT specialists, and no other persons cant help you encrypt the data. DO NOT RESET OR SHUTDOWN - files may be damaged. DO NOT DELETE readme files. To confirm our honest intentions.Send 2 different random files and you will get it decrypted. It can be from different computers on your network to be sure that one key decrypts everything. 2 files we unlock for free To get info (decrypt your files) contact us at [email protected] or [email protected] You will receive btc address for payment in the reply letter Ryuk No system is safe

Signatures

  • Ryuk

    Ransomware distributed via existing botnets, often Trickbot or Emotet.

    ransomwareryuk
  • Drops file in Drivers directory 18 IoCs
  • Modifies extensions of user files 8 IoCs

    Ransomware generally changes the extension on encrypted files.

    ransomware
  • Drops startup file 2 IoCs
  • Drops desktop.ini file(s) 64 IoCs
  • Drops file in System32 directory 64 IoCs
  • Drops file in Program Files directory 64 IoCs
  • Drops file in Windows directory 64 IoCs
  • Opens file in notepad (likely ransom note) 1 IoCs
    ransomware
  • Suspicious behavior: EnumeratesProcesses 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 3 IoCs
  • Suspicious use of WriteProcessMemory 2 IoCs

Processes

  • C:\Windows\system32\Dwm.exe
    "C:\Windows\system32\Dwm.exe"
    1⤵
      PID:1192
    • C:\Windows\system32\taskhost.exe
      "taskhost.exe"
      1⤵
      • Drops file in Drivers directory
      • Modifies extensions of user files
      • Drops startup file
      • Drops desktop.ini file(s)
      • Drops file in System32 directory
      • Drops file in Program Files directory
      • Drops file in Windows directory
      • Suspicious use of AdjustPrivilegeToken
      PID:1136
    • C:\Users\Admin\AppData\Local\Temp\goBnh.exe
      "C:\Users\Admin\AppData\Local\Temp\goBnh.exe"
      1⤵
      • Drops file in Drivers directory
      • Modifies extensions of user files
      • Drops startup file
      • Drops desktop.ini file(s)
      • Drops file in System32 directory
      • Drops file in Program Files directory
      • Drops file in Windows directory
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:1840
    • C:\Windows\system32\NOTEPAD.EXE
      "C:\Windows\system32\NOTEPAD.EXE" C:\Users\Admin\Desktop\RyukReadMe.txt
      1⤵
      • Opens file in notepad (likely ransom note)
      PID:94212

    Network

    MITRE ATT&CK Matrix

    Replay Monitor

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    Downloads

    • memory/1136-59-0x000000013FB10000-0x000000013FE99000-memory.dmp

      Filesize

      3.5MB

      Download

    • memory/94212-124-0x000007FEFC4A1000-0x000007FEFC4A3000-memory.dmp

      Filesize

      8KB

      Download