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Overview

overview

10

Static

static

e99e1b24c8...39.exe

windows7_x64

10

e99e1b24c8...39.exe

windows10-2004_x64

7

Analysis

  • max time kernel
    164s
  • max time network
    151s
  • platform
    windows7_x64
  • resource
    win7-en-20211208
  • submitted
    20/02/2022, 00:48

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General

  • Target

    e99e1b24c8e93ac03721a34f2e2ecfffb11ff247d8a2bdb8c0234e41a122be39.exe

  • Size

    170KB

  • MD5

    b8ebb6a557b474929505f647ebce05d6

  • SHA1

    8b45c835225766c631224fb5c49259fcc12d898f

  • SHA256

    e99e1b24c8e93ac03721a34f2e2ecfffb11ff247d8a2bdb8c0234e41a122be39

  • SHA512

    aa9ee807e94763911cccbf456aa98fb230dfd6fc5ab08e5384b5c018478fcfb8063b4632e937a194777104e76deb113508ec44533fe6d122f8d2b3306b7515fa

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:1212
    • C:\Users\Admin\AppData\Local\Temp\e99e1b24c8e93ac03721a34f2e2ecfffb11ff247d8a2bdb8c0234e41a122be39.exe
      "C:\Users\Admin\AppData\Local\Temp\e99e1b24c8e93ac03721a34f2e2ecfffb11ff247d8a2bdb8c0234e41a122be39.exe"
      1⤵
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:956
      • 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\e99e1b24c8e93ac03721a34f2e2ecfffb11ff247d8a2bdb8c0234e41a122be39.exe" /f
        2⤵
        • Suspicious use of WriteProcessMemory
        PID:520
        • 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\e99e1b24c8e93ac03721a34f2e2ecfffb11ff247d8a2bdb8c0234e41a122be39.exe" /f
          3⤵
          • Adds Run key to start application
          PID:568

    Network

    MITRE ATT&CK Enterprise v6

    Replay Monitor

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    Downloads

    • memory/520-60-0x000000013F920000-0x000000013FCAE000-memory.dmp

      Filesize

      3.6MB

      Download

    • memory/956-55-0x000007FEFC241000-0x000007FEFC243000-memory.dmp

      Filesize

      8KB

      Download

    • memory/1212-56-0x000000013F920000-0x000000013FCAE000-memory.dmp

      Filesize

      3.6MB

      Download

    • memory/1212-58-0x000000013F920000-0x000000013FCAE000-memory.dmp

      Filesize

      3.6MB

      Download