Overview

overview

10

Static

static

667e879d7e...da.exe

windows7_x64

10

667e879d7e...da.exe

windows10-2004_x64

7

Analysis

  • max time kernel
    180s
  • max time network
    166s
  • platform
    windows7_x64
  • resource
    win7-en-20211208
  • submitted
    20-02-2022 06:26

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General

  • Target

    667e879d7eece2bfbf417698003ddf3b6e2050f7b0e92afd465410012fed03da.exe

  • Size

    170KB

  • MD5

    24e7a4dbcd8dffad8f496711130b2b0a

  • SHA1

    0bcc331696e3082bd4743ed335e253b4b40536ba

  • SHA256

    667e879d7eece2bfbf417698003ddf3b6e2050f7b0e92afd465410012fed03da

  • SHA512

    6498e2e85b45a724e1c389ac5cf9388bfa0e784e436fe81ad6f04d3643584f63c020b8c50d20ad118ff2fd98cfa8136fa0a6e5b6da8b870f1968055688918685

Score
10/10
ryukpersistenceransomware

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 or deleted or backup disks were formatted. 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 No decryption software is available in the public. DO NOT RESET OR SHUTDOWN - files may be damaged. DO NOT RENAME OR MOVE the encrypted and readme files. DO NOT DELETE readme files. This may lead to the impossibility of recovery of the certain files. To get info (decrypt your files) contact us at [email protected] or [email protected] BTC wallet: 14hVKm7Ft2rxDBFTNkkRC3kGstMGp2A4hk Ryuk No system is safe
Wallets

14hVKm7Ft2rxDBFTNkkRC3kGstMGp2A4hk

Signatures

  • Ryuk

    Ransomware distributed via existing botnets, often Trickbot or Emotet.

    ransomwareryuk
  • Adds Run key to start application 2 TTPs 2 IoCs
    persistence
  • 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 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of WriteProcessMemory 8 IoCs

Processes

  • C:\Windows\system32\taskhost.exe
    "taskhost.exe"
    1⤵
    • Drops file in Program Files directory
    PID:1128
  • C:\Windows\system32\Dwm.exe
    "C:\Windows\system32\Dwm.exe"
    1⤵
      PID:1196
    • C:\Users\Admin\AppData\Local\Temp\667e879d7eece2bfbf417698003ddf3b6e2050f7b0e92afd465410012fed03da.exe
      "C:\Users\Admin\AppData\Local\Temp\667e879d7eece2bfbf417698003ddf3b6e2050f7b0e92afd465410012fed03da.exe"
      1⤵
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:1792
      • C:\Windows\System32\cmd.exe
        "C:\Windows\System32\cmd.exe" /C REG ADD "HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\Run" /v "svchos" /t REG_SZ /d "C:\Users\Admin\AppData\Local\Temp\667e879d7eece2bfbf417698003ddf3b6e2050f7b0e92afd465410012fed03da.exe" /f
        2⤵
        • Suspicious use of WriteProcessMemory
        PID:1452
        • C:\Windows\system32\reg.exe
          REG ADD "HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\Run" /v "svchos" /t REG_SZ /d "C:\Users\Admin\AppData\Local\Temp\667e879d7eece2bfbf417698003ddf3b6e2050f7b0e92afd465410012fed03da.exe" /f
          3⤵
          • Adds Run key to start application
          PID:1308

    Network

    MITRE ATT&CK Enterprise v6

    Replay Monitor

    Loading Replay Monitor...

    Downloads

    • memory/1128-55-0x000000013FE80000-0x000000014020E000-memory.dmp

      Filesize

      3.6MB

      Download

    • memory/1128-57-0x000000013FE80000-0x000000014020E000-memory.dmp

      Filesize

      3.6MB

      Download

    • memory/1792-54-0x000007FEFB571000-0x000007FEFB573000-memory.dmp

      Filesize

      8KB

      Download