Analysis

  • max time kernel
    140s
  • max time network
    145s
  • platform
    windows10_x64
  • resource
    win10v20201028
  • submitted
    30-03-2021 11:28

General

  • Target

    5de3d5a33745739259fc03cb5a7852440c135f960e8516d92181cd16ba76e2ed.exe

  • Size

    140KB

  • MD5

    75a3cf8ced873ee7bc415e27e108496b

  • SHA1

    ac94165d63c75f4adf1728aa2ecb776ac7c1c18e

  • SHA256

    5de3d5a33745739259fc03cb5a7852440c135f960e8516d92181cd16ba76e2ed

  • SHA512

    7c3e166ff75ad32f70bfb355167333be4f9bc5b5740a231b4a1fb5c391bd8e137ebea6a3ba5370797f016cbdb83631bb5e459e0bc64beb3246ed9605b3bdb903

Malware Config

Extracted

Path

C:\$Recycle.Bin\RyukReadMe.html

Family

ryuk

Ransom Note
contact balance of shadow universe Ryuk $password = '5PcRSFW'; $torlink = 'http://rk2zzyh63g5avvii4irkhymha3irblchdfj7prk6zwy23f6kahidkpqd.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://rk2zzyh63g5avvii4irkhymha3irblchdfj7prk6zwy23f6kahidkpqd.onion

Signatures

  • Ryuk

    Ransomware distributed via existing botnets, often Trickbot or Emotet.

  • Executes dropped EXE 3 IoCs
  • Modifies file permissions 1 TTPs 2 IoCs
  • Enumerates connected drives 3 TTPs 22 IoCs

    Attempts to read the root path of hard drives other than the default C: drive.

  • Drops file in Program Files directory 64 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Suspicious behavior: EnumeratesProcesses 4 IoCs
  • Suspicious use of WriteProcessMemory 15 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\5de3d5a33745739259fc03cb5a7852440c135f960e8516d92181cd16ba76e2ed.exe
    "C:\Users\Admin\AppData\Local\Temp\5de3d5a33745739259fc03cb5a7852440c135f960e8516d92181cd16ba76e2ed.exe"
    1⤵
    • Enumerates connected drives
    • Drops file in Program Files directory
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of WriteProcessMemory
    PID:744
    • C:\Users\Admin\AppData\Local\Temp\cHxyBbAEorep.exe
      "C:\Users\Admin\AppData\Local\Temp\cHxyBbAEorep.exe" 9 REP
      2⤵
      • Executes dropped EXE
      PID:2752
    • C:\Users\Admin\AppData\Local\Temp\bXmnBcHhglan.exe
      "C:\Users\Admin\AppData\Local\Temp\bXmnBcHhglan.exe" 8 LAN
      2⤵
      • Executes dropped EXE
      PID:992
    • C:\Users\Admin\AppData\Local\Temp\DjoFjvcpnlan.exe
      "C:\Users\Admin\AppData\Local\Temp\DjoFjvcpnlan.exe" 8 LAN
      2⤵
      • Executes dropped EXE
      PID:1488
    • C:\Windows\SysWOW64\icacls.exe
      icacls "C:\*" /grant Everyone:F /T /C /Q
      2⤵
      • Modifies file permissions
      PID:3856
    • C:\Windows\SysWOW64\icacls.exe
      icacls "D:\*" /grant Everyone:F /T /C /Q
      2⤵
      • Modifies file permissions
      PID:3832

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

Loading Replay Monitor...

Downloads

  • memory/744-46-0x0000000002DD0000-0x0000000002DD1000-memory.dmp

    Filesize

    4KB

  • memory/744-55-0x0000000002DD0000-0x0000000002DD1000-memory.dmp

    Filesize

    4KB

  • memory/744-16-0x0000000002DD0000-0x0000000002DD1000-memory.dmp

    Filesize

    4KB

  • memory/744-19-0x0000000002DD0000-0x0000000002DD1000-memory.dmp

    Filesize

    4KB

  • memory/744-20-0x0000000002DD0000-0x0000000002DD1000-memory.dmp

    Filesize

    4KB

  • memory/744-18-0x0000000002DD0000-0x0000000002DD1000-memory.dmp

    Filesize

    4KB

  • memory/744-21-0x0000000002DD0000-0x0000000002DD1000-memory.dmp

    Filesize

    4KB

  • memory/744-90-0x0000000002DD0000-0x0000000002DD1000-memory.dmp

    Filesize

    4KB

  • memory/744-22-0x0000000002DD0000-0x0000000002DD1000-memory.dmp

    Filesize

    4KB

  • memory/744-88-0x0000000002DD0000-0x0000000002DD1000-memory.dmp

    Filesize

    4KB

  • memory/744-27-0x0000000002DD0000-0x0000000002DD1000-memory.dmp

    Filesize

    4KB

  • memory/744-26-0x0000000002DD0000-0x0000000002DD1000-memory.dmp

    Filesize

    4KB

  • memory/744-24-0x0000000002DD0000-0x0000000002DD1000-memory.dmp

    Filesize

    4KB

  • memory/744-28-0x0000000002DD0000-0x0000000002DD1000-memory.dmp

    Filesize

    4KB

  • memory/744-29-0x0000000002DD0000-0x0000000002DD1000-memory.dmp

    Filesize

    4KB

  • memory/744-30-0x0000000002DD0000-0x0000000002DD1000-memory.dmp

    Filesize

    4KB

  • memory/744-31-0x0000000002DD0000-0x0000000002DD1000-memory.dmp

    Filesize

    4KB

  • memory/744-32-0x0000000002DD0000-0x0000000002DD1000-memory.dmp

    Filesize

    4KB

  • memory/744-33-0x0000000002DD0000-0x0000000002DD1000-memory.dmp

    Filesize

    4KB

  • memory/744-34-0x0000000002DD0000-0x0000000002DD1000-memory.dmp

    Filesize

    4KB

  • memory/744-36-0x0000000002DD0000-0x0000000002DD1000-memory.dmp

    Filesize

    4KB

  • memory/744-35-0x0000000002DD0000-0x0000000002DD1000-memory.dmp

    Filesize

    4KB

  • memory/744-11-0x0000000002DD0000-0x0000000002DD1000-memory.dmp

    Filesize

    4KB

  • memory/744-38-0x0000000002DD0000-0x0000000002DD1000-memory.dmp

    Filesize

    4KB

  • memory/744-40-0x0000000002DD0000-0x0000000002DD1000-memory.dmp

    Filesize

    4KB

  • memory/744-39-0x0000000002DD0000-0x0000000002DD1000-memory.dmp

    Filesize

    4KB

  • memory/744-41-0x0000000002DD0000-0x0000000002DD1000-memory.dmp

    Filesize

    4KB

  • memory/744-42-0x0000000002DD0000-0x0000000002DD1000-memory.dmp

    Filesize

    4KB

  • memory/744-43-0x0000000002DD0000-0x0000000002DD1000-memory.dmp

    Filesize

    4KB

  • memory/744-44-0x0000000002DD0000-0x0000000002DD1000-memory.dmp

    Filesize

    4KB

  • memory/744-45-0x0000000002DD0000-0x0000000002DD1000-memory.dmp

    Filesize

    4KB

  • memory/744-89-0x0000000002DD0000-0x0000000002DD1000-memory.dmp

    Filesize

    4KB

  • memory/744-48-0x0000000002DD0000-0x0000000002DD1000-memory.dmp

    Filesize

    4KB

  • memory/744-47-0x0000000002DD0000-0x0000000002DD1000-memory.dmp

    Filesize

    4KB

  • memory/744-49-0x0000000002DD0000-0x0000000002DD1000-memory.dmp

    Filesize

    4KB

  • memory/744-50-0x0000000002DD0000-0x0000000002DD1000-memory.dmp

    Filesize

    4KB

  • memory/744-51-0x0000000002DD0000-0x0000000002DD1000-memory.dmp

    Filesize

    4KB

  • memory/744-52-0x0000000002DD0000-0x0000000002DD1000-memory.dmp

    Filesize

    4KB

  • memory/744-54-0x0000000002DD0000-0x0000000002DD1000-memory.dmp

    Filesize

    4KB

  • memory/744-17-0x0000000002DD0000-0x0000000002DD1000-memory.dmp

    Filesize

    4KB

  • memory/744-56-0x0000000002DD0000-0x0000000002DD1000-memory.dmp

    Filesize

    4KB

  • memory/744-57-0x0000000002DD0000-0x0000000002DD1000-memory.dmp

    Filesize

    4KB

  • memory/744-53-0x0000000002DD0000-0x0000000002DD1000-memory.dmp

    Filesize

    4KB

  • memory/744-59-0x0000000002DD0000-0x0000000002DD1000-memory.dmp

    Filesize

    4KB

  • memory/744-60-0x0000000002DD0000-0x0000000002DD1000-memory.dmp

    Filesize

    4KB

  • memory/744-58-0x0000000002DD0000-0x0000000002DD1000-memory.dmp

    Filesize

    4KB

  • memory/744-62-0x0000000002DD0000-0x0000000002DD1000-memory.dmp

    Filesize

    4KB

  • memory/744-61-0x0000000002DD0000-0x0000000002DD1000-memory.dmp

    Filesize

    4KB

  • memory/744-63-0x0000000002DD0000-0x0000000002DD1000-memory.dmp

    Filesize

    4KB

  • memory/744-65-0x0000000002DD0000-0x0000000002DD1000-memory.dmp

    Filesize

    4KB

  • memory/744-67-0x0000000002DD0000-0x0000000002DD1000-memory.dmp

    Filesize

    4KB

  • memory/744-66-0x0000000002DD0000-0x0000000002DD1000-memory.dmp

    Filesize

    4KB

  • memory/744-68-0x0000000002DD0000-0x0000000002DD1000-memory.dmp

    Filesize

    4KB

  • memory/744-64-0x0000000002DD0000-0x0000000002DD1000-memory.dmp

    Filesize

    4KB

  • memory/744-69-0x0000000002DD0000-0x0000000002DD1000-memory.dmp

    Filesize

    4KB

  • memory/744-70-0x0000000002DD0000-0x0000000002DD1000-memory.dmp

    Filesize

    4KB

  • memory/744-71-0x0000000002DD0000-0x0000000002DD1000-memory.dmp

    Filesize

    4KB

  • memory/744-75-0x0000000002DD0000-0x0000000002DD1000-memory.dmp

    Filesize

    4KB

  • memory/744-15-0x0000000002DD0000-0x0000000002DD1000-memory.dmp

    Filesize

    4KB

  • memory/744-14-0x0000000002DD0000-0x0000000002DD1000-memory.dmp

    Filesize

    4KB

  • memory/744-13-0x0000000002DD0000-0x0000000002DD1000-memory.dmp

    Filesize

    4KB

  • memory/744-76-0x0000000002DD0000-0x0000000002DD1000-memory.dmp

    Filesize

    4KB

  • memory/744-77-0x0000000002DD0000-0x0000000002DD1000-memory.dmp

    Filesize

    4KB

  • memory/744-78-0x0000000002DD0000-0x0000000002DD1000-memory.dmp

    Filesize

    4KB

  • memory/744-80-0x0000000002DD0000-0x0000000002DD1000-memory.dmp

    Filesize

    4KB

  • memory/744-79-0x0000000002DD0000-0x0000000002DD1000-memory.dmp

    Filesize

    4KB

  • memory/744-81-0x0000000002DD0000-0x0000000002DD1000-memory.dmp

    Filesize

    4KB

  • memory/744-82-0x0000000002DD0000-0x0000000002DD1000-memory.dmp

    Filesize

    4KB

  • memory/744-83-0x0000000002DD0000-0x0000000002DD1000-memory.dmp

    Filesize

    4KB

  • memory/744-12-0x00000000035D0000-0x00000000035D1000-memory.dmp

    Filesize

    4KB

  • memory/744-84-0x0000000002DD0000-0x0000000002DD1000-memory.dmp

    Filesize

    4KB

  • memory/744-86-0x0000000002DD0000-0x0000000002DD1000-memory.dmp

    Filesize

    4KB

  • memory/744-87-0x0000000002DD0000-0x0000000002DD1000-memory.dmp

    Filesize

    4KB