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Overview

overview

10

Static

static

60c16e45c5...25.exe

windows7_x64

10

60c16e45c5...25.exe

windows10_x64

10

Analysis

  • max time kernel
    121s
  • max time network
    65s
  • platform
    windows10_x64
  • resource
    win10v20201028
  • submitted
    10/04/2021, 14:10

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General

  • Target

    60c16e45c5cbe88a38911f1e3176d90444e4884261d8481d4d719acec1bc5025.exe

  • Size

    136KB

  • MD5

    45295780f2ba837be42ccf50710bd2b5

  • SHA1

    f937b1b7b3593a38702f870077658a891974edda

  • SHA256

    60c16e45c5cbe88a38911f1e3176d90444e4884261d8481d4d719acec1bc5025

  • SHA512

    588666aa108f01334c2e0adc03aa68d5e3ebb68ee773939b668a5a6ca1eacf03570b7608d4ca3c936dd7f7ec6edd4063a05b1cef7d446661c8f00f8520e72f8b

Score
10/10
ryukdiscoveryransomware

Malware Config

Extracted

Path

C:\$Recycle.Bin\RyukReadMe.html

Family

ryuk

Ransom Note
contact balance of shadow universe Ryuk $password = 'spyZ3Hxws'; $torlink = 'http://smtpys6pvcvdvram6xucwecfv7rdhs6fmxzivrbcrncdeiphryhb75id.onion'; function info(){alert("INSTRUCTION:\r\n1. Download tor browser.\r\n2. Open link through tor browser: " + $torlink + "\r\n3. Fill the form, your password: "+ $password +"\r\nWe will contact you shortly.\r\nAlways send files for test decryption.");};
URLs

http://smtpys6pvcvdvram6xucwecfv7rdhs6fmxzivrbcrncdeiphryhb75id.onion

Signatures

  • Ryuk

    Ransomware distributed via existing botnets, often Trickbot or Emotet.

    ransomwareryuk
  • Executes dropped EXE 3 IoCs
  • Modifies file permissions 1 TTPs 2 IoCs
    discovery
  • Enumerates connected drives 3 TTPs 22 IoCs

    Attempts to read the root path of hard drives other than the default C: drive.

  • 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.

  • Runs net.exe
  • Suspicious behavior: EnumeratesProcesses 4 IoCs
  • Suspicious use of WriteProcessMemory 15 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\60c16e45c5cbe88a38911f1e3176d90444e4884261d8481d4d719acec1bc5025.exe
    "C:\Users\Admin\AppData\Local\Temp\60c16e45c5cbe88a38911f1e3176d90444e4884261d8481d4d719acec1bc5025.exe"
    1⤵
    • Enumerates connected drives
    • Drops file in Program Files directory
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of WriteProcessMemory
    PID:1212
    • C:\Users\Admin\AppData\Local\Temp\YFFRqPhjRrep.exe
      "C:\Users\Admin\AppData\Local\Temp\YFFRqPhjRrep.exe" 9 REP
      2⤵
      • Executes dropped EXE
      PID:3408
    • C:\Users\Admin\AppData\Local\Temp\EJenDAOhKlan.exe
      "C:\Users\Admin\AppData\Local\Temp\EJenDAOhKlan.exe" 8 LAN
      2⤵
      • Executes dropped EXE
      PID:640
    • C:\Users\Admin\AppData\Local\Temp\eynOXuXAHlan.exe
      "C:\Users\Admin\AppData\Local\Temp\eynOXuXAHlan.exe" 8 LAN
      2⤵
      • Executes dropped EXE
      PID:2204
    • C:\Windows\SysWOW64\icacls.exe
      icacls "C:\*" /grant Everyone:F /T /C /Q
      2⤵
      • Modifies file permissions
      PID:1172
    • C:\Windows\SysWOW64\icacls.exe
      icacls "D:\*" /grant Everyone:F /T /C /Q
      2⤵
      • Modifies file permissions
      PID:1168
    • C:\Windows\SysWOW64\net.exe
      "C:\Windows\System32\net.exe" stop "audioendpointbuilder" /y
      2⤵
        PID:3232
        • C:\Windows\SysWOW64\net1.exe
          C:\Windows\system32\net1 stop "audioendpointbuilder" /y
          3⤵
            PID:1596
        • C:\Windows\SysWOW64\net.exe
          "C:\Windows\System32\net.exe" stop "samss" /y
          2⤵
            PID:4824
            • C:\Windows\SysWOW64\net1.exe
              C:\Windows\system32\net1 stop "samss" /y
              3⤵
                PID:3024
            • C:\Windows\SysWOW64\net.exe
              "C:\Windows\System32\net.exe" stop "audioendpointbuilder" /y
              2⤵
                PID:4940
                • C:\Windows\SysWOW64\net1.exe
                  C:\Windows\system32\net1 stop "audioendpointbuilder" /y
                  3⤵
                    PID:1592
                • C:\Windows\SysWOW64\net.exe
                  "C:\Windows\System32\net.exe" stop "samss" /y
                  2⤵
                    PID:3700
                    • C:\Windows\SysWOW64\net1.exe
                      C:\Windows\system32\net1 stop "samss" /y
                      3⤵
                        PID:2212

                  Network

                  MITRE ATT&CK Enterprise v6

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                  Downloads