Analysis

  • max time kernel
    168s
  • max time network
    32s
  • platform
    windows7_x64
  • resource
    win7-en-20211208
  • submitted
    20-02-2022 01:18

General

  • Target

    def050d478f9e84882b007f3cd20dc4ffd3bf6f913532caa63ee4c9aec37dc86.exe

  • Size

    202KB

  • MD5

    19c2252f877112192dd1112dde32e3d4

  • SHA1

    33f7c585527d012ba115d313003ca52b0fabcdb6

  • SHA256

    def050d478f9e84882b007f3cd20dc4ffd3bf6f913532caa63ee4c9aec37dc86

  • SHA512

    4f639986b6464c5b7802ed8f4bb2f069489da5ea556181db51b0ced62cf9e0f2afc8287d99b7a3678ed9402b629f4205dd8a92c4f4862977b2294f7df2a941bc

Score
10/10

Malware Config

Extracted

Path

C:\RyukReadMe.html

Family

ryuk

Ransom Note
<html><body><p style="font-weight:bold;font-size:125%;top:0;left:0;"> [email protected] <br> [email protected] </p><p style="position:absolute;bottom:0;right:1%;font-weight:bold;font-size:170%">balance of shadow universe</p><div style="font-size: 550%;font-weight:bold;width:50%;height:50%;overflow:auto;margin:auto;position:absolute;top:35%;left:40%;">Ryuk</div></body></html�������������������������������������������������������������������������������������������������������������������������������������������������������

Signatures

  • Ryuk

    Ransomware distributed via existing botnets, often Trickbot or Emotet.

  • Drops desktop.ini file(s) 61 IoCs
  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

  • Runs net.exe
  • Suspicious behavior: EnumeratesProcesses 3 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of WriteProcessMemory 24 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\def050d478f9e84882b007f3cd20dc4ffd3bf6f913532caa63ee4c9aec37dc86.exe
    "C:\Users\Admin\AppData\Local\Temp\def050d478f9e84882b007f3cd20dc4ffd3bf6f913532caa63ee4c9aec37dc86.exe"
    1⤵
    • Drops desktop.ini file(s)
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:1820
    • C:\Windows\System32\net.exe
      "C:\Windows\System32\net.exe" stop "audioendpointbuilder" /y
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:524
      • C:\Windows\system32\net1.exe
        C:\Windows\system32\net1 stop "audioendpointbuilder" /y
        3⤵
          PID:1744
      • C:\Windows\System32\net.exe
        "C:\Windows\System32\net.exe" stop "samss" /y
        2⤵
        • Suspicious use of WriteProcessMemory
        PID:1652
        • C:\Windows\system32\net1.exe
          C:\Windows\system32\net1 stop "samss" /y
          3⤵
            PID:1772
        • C:\Windows\System32\net.exe
          "C:\Windows\System32\net.exe" stop "samss" /y
          2⤵
          • Suspicious use of WriteProcessMemory
          PID:15176
          • C:\Windows\system32\net1.exe
            C:\Windows\system32\net1 stop "samss" /y
            3⤵
              PID:15320
          • C:\Windows\System32\net.exe
            "C:\Windows\System32\net.exe" stop "samss" /y
            2⤵
            • Suspicious use of WriteProcessMemory
            PID:740
            • C:\Windows\system32\net1.exe
              C:\Windows\system32\net1 stop "samss" /y
              3⤵
                PID:680

          Network

          MITRE ATT&CK Enterprise v6

          Replay Monitor

          Loading Replay Monitor...

          Downloads