Overview

overview

10

Static

static

53cfffafc3...14.exe

windows7_x64

10

53cfffafc3...14.exe

windows10-2004_x64

7

Analysis

  • max time kernel
    169s
  • max time network
    48s
  • platform
    windows7_x64
  • resource
    win7-en-20211208
  • submitted
    20-02-2022 07:19

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General

  • Target

    53cfffafc3f552b70e336dfe56d48ac9b78f62ced2992297828948f149f01f14.exe

  • Size

    150KB

  • MD5

    d6a8a47358a0be9cd88e3909023a26b7

  • SHA1

    a309b709036cf394afa39b9dd8ae90dff2f00cd2

  • SHA256

    53cfffafc3f552b70e336dfe56d48ac9b78f62ced2992297828948f149f01f14

  • SHA512

    1913bd3996729a5f5912c171b80159529b688e4c19283740f28eba5859bdb83f7a4612494cb56396993f5795045a768b7e820deedd166c1e8303210c84ee80f4

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 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] BTC wallet: 1C8n86EEttnDjNKM9Tjm7QNVgwGBncQhDs Ryuk No system is safe
Wallets

1C8n86EEttnDjNKM9Tjm7QNVgwGBncQhDs

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\Dwm.exe
    "C:\Windows\system32\Dwm.exe"
    1⤵
      PID:1236
    • C:\Windows\system32\taskhost.exe
      "taskhost.exe"
      1⤵
      • Drops file in Program Files directory
      PID:1144
    • C:\Users\Admin\AppData\Local\Temp\53cfffafc3f552b70e336dfe56d48ac9b78f62ced2992297828948f149f01f14.exe
      "C:\Users\Admin\AppData\Local\Temp\53cfffafc3f552b70e336dfe56d48ac9b78f62ced2992297828948f149f01f14.exe"
      1⤵
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:1364
      • 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\53cfffafc3f552b70e336dfe56d48ac9b78f62ced2992297828948f149f01f14.exe" /f
        2⤵
        • Suspicious use of WriteProcessMemory
        PID:676
        • 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\53cfffafc3f552b70e336dfe56d48ac9b78f62ced2992297828948f149f01f14.exe" /f
          3⤵
          • Adds Run key to start application
          PID:1504

    Network

    MITRE ATT&CK Matrix ATT&CK v6

    Initial Access

    Execution

    Persistence

    Registry Run Keys / Startup Folder

    1
    T1060

    Privilege Escalation

    Defense Evasion

    Modify Registry

    1
    T1112

    Credential Access

    Discovery

    System Information Discovery

    1
    T1082

    Lateral Movement

    Collection

    Exfiltration

    Command and Control

    Impact

    Replay Monitor

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    Downloads

    • memory/1144-55-0x000000013F7C0000-0x000000013FB49000-memory.dmp
      Filesize

      3.5MB

      Download
    • memory/1144-57-0x000000013F7C0000-0x000000013FB49000-memory.dmp
      Filesize

      3.5MB

      Download
    • memory/1364-54-0x000007FEFC3C1000-0x000007FEFC3C3000-memory.dmp
      Filesize

      8KB

      Download