Overview

overview

10

Static

static

a02107e2dc...cd.exe

windows7_x64

10

a02107e2dc...cd.exe

windows10-2004_x64

10

Analysis

  • max time kernel
    158s
  • max time network
    59s
  • platform
    windows7_x64
  • resource
    win7-en-20211208
  • submitted
    20-02-2022 03:56

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General

  • Target

    a02107e2dc63a86777f46ed7d3c18ef4485eac83cb14ca1a0fca2f4d80e815cd.exe

  • Size

    201KB

  • MD5

    bf39de2f9f4f5070199213161d9d6c05

  • SHA1

    5ce23ef35396f777855f7a3b05e47329cc7226b7

  • SHA256

    a02107e2dc63a86777f46ed7d3c18ef4485eac83cb14ca1a0fca2f4d80e815cd

  • SHA512

    1c0c591c5fdb65fc33c2ded6e89ab65aac5f45996068ca2e0b0d8a56d56371f9c104cfa15641af7bee4127a92d69fa5ed43a7f8dd8bc251440ea8b513e262cd9

Score
10/10
ryukpersistenceransomware

Malware Config

Extracted

Path

C:\Users\Admin\AppData\Local\Temp\RyukReadMe.html

Family

ryuk

Ransom Note
<html><body><p style="font-weight:bold;font-size:125%;top:0;left:0;"> [email protected] <br> </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�������������������������������������������������������������������������������������������������������������������������������������������������������

Extracted

Path

C:\RyukReadMe.html

Family

ryuk

Ransom Note
[email protected] balance of shadow universe Ryuk

Signatures

  • Ryuk

    Ransomware distributed via existing botnets, often Trickbot or Emotet.

    ransomwareryuk
  • Executes dropped EXE 1 IoCs
  • Loads dropped DLL 2 IoCs
  • Adds Run key to start application 2 TTPs 6 IoCs
    persistence
  • Enumerates physical storage devices 1 TTPs

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

  • Runs net.exe
  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious use of AdjustPrivilegeToken 4 IoCs
  • Suspicious use of WriteProcessMemory 53 IoCs

Processes

  • C:\Windows\system32\taskhost.exe
    "taskhost.exe"
    1⤵
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:1256
    • C:\Windows\System32\net.exe
      "C:\Windows\System32\net.exe" stop "samss" /y
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:1064
      • C:\Windows\system32\net1.exe
        C:\Windows\system32\net1 stop "samss" /y
        3⤵
          PID:988
      • 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:\Windows\system32\taskhost.exe" /f
        2⤵
        • Suspicious use of WriteProcessMemory
        PID:2040
        • C:\Windows\system32\reg.exe
          REG ADD "HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\Run" /v "svchos" /t REG_SZ /d "C:\Windows\system32\taskhost.exe" /f
          3⤵
          • Adds Run key to start application
          PID:304
    • C:\Windows\system32\Dwm.exe
      "C:\Windows\system32\Dwm.exe"
      1⤵
        PID:1360
      • C:\Users\Admin\AppData\Local\Temp\a02107e2dc63a86777f46ed7d3c18ef4485eac83cb14ca1a0fca2f4d80e815cd.exe
        "C:\Users\Admin\AppData\Local\Temp\a02107e2dc63a86777f46ed7d3c18ef4485eac83cb14ca1a0fca2f4d80e815cd.exe"
        1⤵
        • Loads dropped DLL
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of WriteProcessMemory
        PID:1716
        • C:\Users\Admin\AppData\Local\Temp\YJIvUXj.exe
          "C:\Users\Admin\AppData\Local\Temp\YJIvUXj.exe" 8 LAN
          2⤵
          • Executes dropped EXE
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          • Suspicious use of WriteProcessMemory
          PID:576
          • C:\Windows\System32\net.exe
            "C:\Windows\System32\net.exe" stop "samss" /y
            3⤵
            • Suspicious use of WriteProcessMemory
            PID:1356
            • C:\Windows\system32\net1.exe
              C:\Windows\system32\net1 stop "samss" /y
              4⤵
                PID:2012
            • 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\YJIvUXj.exe" /f
              3⤵
              • Suspicious use of WriteProcessMemory
              PID:3864
              • 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\YJIvUXj.exe" /f
                4⤵
                • Adds Run key to start application
                PID:3888
          • C:\Windows\System32\net.exe
            "C:\Windows\System32\net.exe" stop "audioendpointbuilder" /y
            2⤵
            • Suspicious use of WriteProcessMemory
            PID:872
            • C:\Windows\system32\net1.exe
              C:\Windows\system32\net1 stop "audioendpointbuilder" /y
              3⤵
                PID:896
            • C:\Windows\System32\net.exe
              "C:\Windows\System32\net.exe" stop "samss" /y
              2⤵
              • Suspicious use of WriteProcessMemory
              PID:1248
              • C:\Windows\system32\net1.exe
                C:\Windows\system32\net1 stop "samss" /y
                3⤵
                  PID:1824
              • 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\a02107e2dc63a86777f46ed7d3c18ef4485eac83cb14ca1a0fca2f4d80e815cd.exe" /f
                2⤵
                • Suspicious use of WriteProcessMemory
                PID:1056
                • 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\a02107e2dc63a86777f46ed7d3c18ef4485eac83cb14ca1a0fca2f4d80e815cd.exe" /f
                  3⤵
                  • Adds Run key to start application
                  PID:1764
              • C:\Windows\System32\net.exe
                "C:\Windows\System32\net.exe" stop "samss" /y
                2⤵
                • Suspicious use of WriteProcessMemory
                PID:1980
                • C:\Windows\system32\net1.exe
                  C:\Windows\system32\net1 stop "samss" /y
                  3⤵
                    PID:1072

              Network

              MITRE ATT&CK Enterprise v6

              Replay Monitor

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              Downloads

              • memory/1256-61-0x000000013FEA0000-0x0000000140015000-memory.dmp

                Filesize

                1.5MB

                Download

              • memory/1256-59-0x000000013FEA0000-0x0000000140015000-memory.dmp

                Filesize

                1.5MB

                Download

              • memory/1360-62-0x000000013FEA0000-0x0000000140015000-memory.dmp

                Filesize

                1.5MB

                Download

              • memory/1716-55-0x000007FEFBE21000-0x000007FEFBE23000-memory.dmp

                Filesize

                8KB

                Download