Overview

overview

10

Static

static

aa356e1d44...f6.exe

windows7_x64

10

aa356e1d44...f6.exe

windows10-2004_x64

7

Analysis

  • max time kernel
    169s
  • max time network
    45s
  • platform
    windows7_x64
  • resource
    win7-en-20211208
  • submitted
    20-02-2022 03:30

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General

  • Target

    aa356e1d445cca768a71f037d6a0111e613213bf2fd67fffdeae346001143bf6.exe

  • Size

    170KB

  • MD5

    0e53108935aa122b8faeda0de6fae8bd

  • SHA1

    fd7491b116e3695b832c171b6c003773fa95342b

  • SHA256

    aa356e1d445cca768a71f037d6a0111e613213bf2fd67fffdeae346001143bf6

  • SHA512

    df74ad57514cf8866a738f7ab3058a51f3ca7450bc63affc0ff05facc1e43e5d19dc1f23daa0ec7fc03312eacff2ff9e1233e6e420935365a260babc93d0d3d4

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 9 IoCs

Processes

  • C:\Windows\system32\Dwm.exe
    "C:\Windows\system32\Dwm.exe"
    1⤵
      PID:1308
    • C:\Windows\system32\taskhost.exe
      "taskhost.exe"
      1⤵
      • Drops file in Program Files directory
      PID:1216
    • C:\Users\Admin\AppData\Local\Temp\aa356e1d445cca768a71f037d6a0111e613213bf2fd67fffdeae346001143bf6.exe
      "C:\Users\Admin\AppData\Local\Temp\aa356e1d445cca768a71f037d6a0111e613213bf2fd67fffdeae346001143bf6.exe"
      1⤵
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:1636
      • 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\aa356e1d445cca768a71f037d6a0111e613213bf2fd67fffdeae346001143bf6.exe" /f
        2⤵
        • Suspicious use of WriteProcessMemory
        PID:1796
        • 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\aa356e1d445cca768a71f037d6a0111e613213bf2fd67fffdeae346001143bf6.exe" /f
          3⤵
          • Adds Run key to start application
          PID:860

    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/1216-55-0x000000013FC70000-0x000000013FFFE000-memory.dmp
      Filesize

      3.6MB

      Download
    • memory/1216-57-0x000000013FC70000-0x000000013FFFE000-memory.dmp
      Filesize

      3.6MB

      Download
    • memory/1636-54-0x000007FEFB711000-0x000007FEFB713000-memory.dmp
      Filesize

      8KB

      Download