Overview

overview

10

Static

static

a563c50c5f...7d.exe

windows7_x64

10

a563c50c5f...7d.exe

windows10_x64

10

Analysis

  • max time kernel
    150s
  • max time network
    104s
  • platform
    windows10_x64
  • resource
    win10v20201028
  • submitted
    11-03-2021 15:09

Sharing

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General

  • Target

    a563c50c5fa0fd541248acaf72cc4e7d.exe

  • Size

    635KB

  • MD5

    a563c50c5fa0fd541248acaf72cc4e7d

  • SHA1

    4b8c12b074e20a796071aa50dc82fe2ff755e8f6

  • SHA256

    180f82bbedb03dc29328e32e054069870a1e65078b78b2120a84c96aaed7d843

  • SHA512

    d7c4c92b3eeb8cefe6d007b7b4fd79cbec388582ca0f3708d520a2c3e432d490d2f69ce365edbc1141f13e71ac473fed74a4367b7898af68d5c1e3b4e4899479

Score
10/10
ryukdavediscoveryransomware

Malware Config

Extracted

Path

C:\users\Public\RyukReadMe.html

Family

ryuk

Ransom Note
contact balance of shadow universe Ryuk $password = '5GqsR1ewcO'; $torlink = 'http://piesa6sapybbrz63pqmmwdzyc5fp73b3uya5cpli6pp5jpswndiu44id.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://piesa6sapybbrz63pqmmwdzyc5fp73b3uya5cpli6pp5jpswndiu44id.onion

Signatures

  • Ryuk

    Ransomware distributed via existing botnets, often Trickbot or Emotet.

    ransomwareryuk
  • Dave packer 1 IoCs

    Detects executable packed with a packer named 'Dave' from the community, due to a string at the end of it.

    dave
  • Executes dropped EXE 3 IoCs
  • Drops startup file 1 IoCs
  • Modifies file permissions 1 TTPs 2 IoCs
    discovery
  • Drops desktop.ini file(s) 1 IoCs
  • 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 SetWindowsHookEx 8 IoCs
  • Suspicious use of WriteProcessMemory 39 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\a563c50c5fa0fd541248acaf72cc4e7d.exe
    "C:\Users\Admin\AppData\Local\Temp\a563c50c5fa0fd541248acaf72cc4e7d.exe"
    1⤵
    • Drops startup file
    • Drops desktop.ini file(s)
    • Drops file in Program Files directory
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of SetWindowsHookEx
    • Suspicious use of WriteProcessMemory
    PID:1192
    • C:\Users\Admin\AppData\Local\Temp\SOyMLhrXQrep.exe
      "C:\Users\Admin\AppData\Local\Temp\SOyMLhrXQrep.exe" 9 REP
      2⤵
      • Executes dropped EXE
      • Suspicious use of SetWindowsHookEx
      PID:808
    • C:\Users\Admin\AppData\Local\Temp\nMmKpNWSklan.exe
      "C:\Users\Admin\AppData\Local\Temp\nMmKpNWSklan.exe" 8 LAN
      2⤵
      • Executes dropped EXE
      • Suspicious use of SetWindowsHookEx
      PID:1456
    • C:\Users\Admin\AppData\Local\Temp\hgrBEFwjLlan.exe
      "C:\Users\Admin\AppData\Local\Temp\hgrBEFwjLlan.exe" 8 LAN
      2⤵
      • Executes dropped EXE
      • Suspicious use of SetWindowsHookEx
      PID:744
    • C:\Windows\SysWOW64\icacls.exe
      icacls "C:\*" /grant Everyone:F /T /C /Q
      2⤵
      • Modifies file permissions
      PID:4552
    • C:\Windows\SysWOW64\icacls.exe
      icacls "D:\*" /grant Everyone:F /T /C /Q
      2⤵
      • Modifies file permissions
      PID:4564
    • C:\Windows\SysWOW64\net.exe
      "C:\Windows\System32\net.exe" stop "audioendpointbuilder" /y
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:4680
      • C:\Windows\SysWOW64\net1.exe
        C:\Windows\system32\net1 stop "audioendpointbuilder" /y
        3⤵
          PID:4724
      • C:\Windows\SysWOW64\net.exe
        "C:\Windows\System32\net.exe" stop "audioendpointbuilder" /y
        2⤵
        • Suspicious use of WriteProcessMemory
        PID:4560
        • C:\Windows\SysWOW64\net1.exe
          C:\Windows\system32\net1 stop "audioendpointbuilder" /y
          3⤵
            PID:1452
        • C:\Windows\SysWOW64\net.exe
          "C:\Windows\System32\net.exe" stop "samss" /y
          2⤵
          • Suspicious use of WriteProcessMemory
          PID:5024
          • C:\Windows\SysWOW64\net1.exe
            C:\Windows\system32\net1 stop "samss" /y
            3⤵
              PID:4992
          • C:\Windows\SysWOW64\net.exe
            "C:\Windows\System32\net.exe" stop "samss" /y
            2⤵
            • Suspicious use of WriteProcessMemory
            PID:4652
            • C:\Windows\SysWOW64\net1.exe
              C:\Windows\system32\net1 stop "samss" /y
              3⤵
                PID:5068

          Network

          MITRE ATT&CK Enterprise v6

          Replay Monitor

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          Downloads

          • memory/744-23-0x00000000020A0000-0x00000000020C4000-memory.dmp

            Filesize

            144KB

            Download

          • memory/808-9-0x0000000002190000-0x00000000021B4000-memory.dmp

            Filesize

            144KB

            Download

          • memory/1192-27-0x00000000031E0000-0x00000000031E1000-memory.dmp

            Filesize

            4KB

            Download

          • memory/1192-28-0x00000000039E0000-0x00000000039E1000-memory.dmp

            Filesize

            4KB

            Download

          • memory/1192-4-0x00000000022B0000-0x00000000022D2000-memory.dmp

            Filesize

            136KB

            Download

          • memory/1192-3-0x0000000035000000-0x0000000035029000-memory.dmp

            Filesize

            164KB

            Download

          • memory/1192-2-0x00000000022E0000-0x0000000002304000-memory.dmp

            Filesize

            144KB

            Download

          • memory/1456-16-0x00000000021C0000-0x00000000021E4000-memory.dmp

            Filesize

            144KB

            Download