Overview

overview

10

Static

static

4517460c76...f3.exe

windows7_x64

10

4517460c76...f3.exe

windows10-2004_x64

8

Analysis

  • max time kernel
    191s
  • max time network
    54s
  • platform
    windows7_x64
  • resource
    win7-en-20211208
  • submitted
    20-02-2022 07:55

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General

  • Target

    4517460c769903a54b14a2673a89bbb8d857be18837d0015733f2445ba17b2f3.exe

  • Size

    396KB

  • MD5

    79e52b0a6a08e5213f6c48fd70c037f4

  • SHA1

    81150445f316941f08180e99d379bab5b47ffecf

  • SHA256

    4517460c769903a54b14a2673a89bbb8d857be18837d0015733f2445ba17b2f3

  • SHA512

    c2570e299d7809a3b1b5a1f9e7aa85fcad40ef781ccd2ed2ecb10a1381753cf98cbc6ae025109a6da12561349f07a8b5327d2f6808581eb40dbdd03474019533

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
  • Executes dropped EXE 1 IoCs
  • Deletes itself 1 IoCs
  • Loads dropped DLL 1 IoCs
  • 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 12 IoCs

Processes

  • C:\Windows\system32\Dwm.exe
    "C:\Windows\system32\Dwm.exe"
    1⤵
      PID:1372
    • C:\Windows\system32\taskhost.exe
      "taskhost.exe"
      1⤵
      • Drops file in Program Files directory
      PID:1276
    • C:\Users\Admin\AppData\Local\Temp\4517460c769903a54b14a2673a89bbb8d857be18837d0015733f2445ba17b2f3.exe
      "C:\Users\Admin\AppData\Local\Temp\4517460c769903a54b14a2673a89bbb8d857be18837d0015733f2445ba17b2f3.exe"
      1⤵
      • Loads dropped DLL
      • Suspicious use of WriteProcessMemory
      PID:1316
      • C:\users\Public\UwtLn.exe
        "C:\users\Public\UwtLn.exe" C:\Users\Admin\AppData\Local\Temp\4517460c769903a54b14a2673a89bbb8d857be18837d0015733f2445ba17b2f3.exe
        2⤵
        • Executes dropped EXE
        • Deletes itself
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of WriteProcessMemory
        PID:616
        • 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\Public\UwtLn.exe" /f
          3⤵
          • Suspicious use of WriteProcessMemory
          PID:864
          • C:\Windows\system32\reg.exe
            REG ADD "HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\Run" /v "svchos" /t REG_SZ /d "C:\users\Public\UwtLn.exe" /f
            4⤵
            • Adds Run key to start application
            PID:1964

    Network

    MITRE ATT&CK Enterprise v6

    Replay Monitor

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    Downloads

    • memory/616-57-0x000007FEFBEE1000-0x000007FEFBEE3000-memory.dmp

      Filesize

      8KB

      Download

    • memory/1276-58-0x000000013F650000-0x000000013F9DE000-memory.dmp

      Filesize

      3.6MB

      Download

    • memory/1276-60-0x000000013F650000-0x000000013F9DE000-memory.dmp

      Filesize

      3.6MB

      Download

    • memory/1316-54-0x0000000075D61000-0x0000000075D63000-memory.dmp

      Filesize

      8KB

      Download