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Overview

overview

10

Static

static

095cae47da...f2.exe

windows7_x64

10

095cae47da...f2.exe

windows10_x64

10

Resubmissions

11/06/2021, 09:25

210611-4ldscwwnln 10

11/06/2021, 09:21

210611-h2e98z629s 8

Analysis

  • max time kernel
    561s
  • max time network
    392s
  • platform
    windows10_x64
  • resource
    win10v20210410
  • submitted
    11/06/2021, 09:25

Sharing

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General

  • Target

    095cae47da0044f82f4bcc9a5cdf4bc099f3eccd2497b81afcd66c53286bc5f2.exe

  • Size

    304KB

  • MD5

    b38db96edbdac1684268b98c8dcffce7

  • SHA1

    88d410bfa5810af0b3c6add7b4911f7a57ea7213

  • SHA256

    095cae47da0044f82f4bcc9a5cdf4bc099f3eccd2497b81afcd66c53286bc5f2

  • SHA512

    bee65541a8f563d793e6be861ad7e92183c6cfd36e14e558a9c01267d26c759cbc0871bfd6b66c692dfd2161df42705e9db2d9de2ad45d66471b36a4426eaaa3

Score
10/10
ryukransomware

Malware Config

Extracted

Path

C:\users\Public\RyukReadMe.html

Family

ryuk

Ransom Note
contact balance of shadow universe Ryuk $password = 'yxFS7vMc'; $torlink = 'http://vqurn5zgys2zd5z5r5fxnfskpzr74i63ehk7ucmrlbvsuszapwoo62qd.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://vqurn5zgys2zd5z5r5fxnfskpzr74i63ehk7ucmrlbvsuszapwoo62qd.onion

Signatures

  • Ryuk

    Ransomware distributed via existing botnets, often Trickbot or Emotet.

    ransomwareryuk
  • Executes dropped EXE 2 IoCs
  • Modifies extensions of user files 7 IoCs

    Ransomware generally changes the extension on encrypted files.

    ransomware
  • Drops startup file 1 IoCs
  • Drops desktop.ini file(s) 1 IoCs
  • Enumerates connected drives 3 TTPs 23 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 8 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of WriteProcessMemory 64 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\095cae47da0044f82f4bcc9a5cdf4bc099f3eccd2497b81afcd66c53286bc5f2.exe
    "C:\Users\Admin\AppData\Local\Temp\095cae47da0044f82f4bcc9a5cdf4bc099f3eccd2497b81afcd66c53286bc5f2.exe"
    1⤵
    • Modifies extensions of user files
    • Drops startup file
    • Drops desktop.ini file(s)
    • Enumerates connected drives
    • Drops file in Program Files directory
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of WriteProcessMemory
    PID:3916
    • C:\Users\Admin\AppData\Local\Temp\1073r.exe
      "C:\Users\Admin\AppData\Local\Temp\1073r.exe" 9 REP
      2⤵
      • Executes dropped EXE
      PID:344
    • C:\Users\Admin\AppData\Local\Temp\arkzUTEJPlan.exe
      "C:\Users\Admin\AppData\Local\Temp\arkzUTEJPlan.exe" 8 LAN
      2⤵
      • Executes dropped EXE
      PID:3908
    • C:\Windows\SysWOW64\net.exe
      "C:\Windows\System32\net.exe" stop "audioendpointbuilder" /y
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:2168
      • C:\Windows\SysWOW64\net1.exe
        C:\Windows\system32\net1 stop "audioendpointbuilder" /y
        3⤵
          PID:1900
      • C:\Windows\SysWOW64\net.exe
        "C:\Windows\System32\net.exe" stop "samss" /y
        2⤵
        • Suspicious use of WriteProcessMemory
        PID:2104
        • C:\Windows\SysWOW64\net1.exe
          C:\Windows\system32\net1 stop "samss" /y
          3⤵
            PID:3812
        • C:\Windows\SysWOW64\net.exe
          "C:\Windows\System32\net.exe" stop "samss" /y
          2⤵
          • Suspicious use of WriteProcessMemory
          PID:3740
          • C:\Windows\SysWOW64\net1.exe
            C:\Windows\system32\net1 stop "samss" /y
            3⤵
              PID:2004
          • C:\Windows\SysWOW64\net.exe
            "C:\Windows\System32\net.exe" stop "audioendpointbuilder" /y
            2⤵
            • Suspicious use of WriteProcessMemory
            PID:3156
            • C:\Windows\SysWOW64\net1.exe
              C:\Windows\system32\net1 stop "audioendpointbuilder" /y
              3⤵
                PID:3976
            • C:\Windows\SysWOW64\net.exe
              "C:\Windows\System32\net.exe" stop "coremessagingregistrar" /y
              2⤵
              • Suspicious use of WriteProcessMemory
              PID:1116
              • C:\Windows\SysWOW64\net1.exe
                C:\Windows\system32\net1 stop "coremessagingregistrar" /y
                3⤵
                  PID:3980
              • C:\Windows\SysWOW64\net.exe
                "C:\Windows\System32\net.exe" stop "coremessagingregistrar" /y
                2⤵
                • Suspicious use of WriteProcessMemory
                PID:1168
                • C:\Windows\SysWOW64\net1.exe
                  C:\Windows\system32\net1 stop "coremessagingregistrar" /y
                  3⤵
                    PID:1308
                • C:\Windows\SysWOW64\net.exe
                  "C:\Windows\System32\net.exe" stop "samss" /y
                  2⤵
                  • Suspicious use of WriteProcessMemory
                  PID:8720
                  • C:\Windows\SysWOW64\net1.exe
                    C:\Windows\system32\net1 stop "samss" /y
                    3⤵
                      PID:8892
                  • C:\Windows\SysWOW64\net.exe
                    "C:\Windows\System32\net.exe" stop "samss" /y
                    2⤵
                    • Suspicious use of WriteProcessMemory
                    PID:8856
                    • C:\Windows\SysWOW64\net1.exe
                      C:\Windows\system32\net1 stop "samss" /y
                      3⤵
                        PID:8680
                    • C:\Windows\SysWOW64\net.exe
                      "C:\Windows\System32\net.exe" stop "coremessagingregistrar" /y
                      2⤵
                      • Suspicious use of WriteProcessMemory
                      PID:8860
                      • C:\Windows\SysWOW64\net1.exe
                        C:\Windows\system32\net1 stop "coremessagingregistrar" /y
                        3⤵
                          PID:8684
                      • C:\Windows\SysWOW64\net.exe
                        "C:\Windows\System32\net.exe" stop "coremessagingregistrar" /y
                        2⤵
                        • Suspicious use of WriteProcessMemory
                        PID:8568
                        • C:\Windows\SysWOW64\net1.exe
                          C:\Windows\system32\net1 stop "coremessagingregistrar" /y
                          3⤵
                            PID:8776
                      • \??\c:\windows\system32\svchost.exe
                        c:\windows\system32\svchost.exe -k netsvcs -s seclogon
                        1⤵
                        • Suspicious use of AdjustPrivilegeToken
                        PID:2692

                      Network

                      MITRE ATT&CK Enterprise v6

                      Replay Monitor

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                      Downloads

                      • memory/344-123-0x0000000035000000-0x0000000035054000-memory.dmp

                        Filesize

                        336KB

                        Download

                      • memory/344-122-0x0000000000510000-0x000000000065A000-memory.dmp

                        Filesize

                        1.3MB

                        Download

                      • memory/3908-125-0x0000000035000000-0x0000000035054000-memory.dmp

                        Filesize

                        336KB

                        Download

                      • memory/3908-124-0x0000000000550000-0x0000000000576000-memory.dmp

                        Filesize

                        152KB

                        Download

                      • memory/3916-114-0x00000000004A0000-0x00000000005EA000-memory.dmp

                        Filesize

                        1.3MB

                        Download

                      • memory/3916-115-0x0000000035000000-0x0000000035054000-memory.dmp

                        Filesize

                        336KB

                        Download