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Analysis

  • max time kernel
    180s
  • max time network
    148s
  • platform
    windows7_x64
  • resource
    win7-en-20211208
  • submitted
    20/02/2022, 07:39

General

  • Target

    4b5b08346e369b59cae2120fcdc16b720bf2f2ec74115045cfafc24eecccb539.exe

  • Size

    188KB

  • MD5

    d2d3d877e06b0181b67c6e610b40c44c

  • SHA1

    6a0dd2ab04d5b0b6869d5b7d9b4eb591087bace9

  • SHA256

    4b5b08346e369b59cae2120fcdc16b720bf2f2ec74115045cfafc24eecccb539

  • SHA512

    320cc4f1862425d706c4d369fa5f13a62cc9f3454dae91b239a28440c14dd92972b8d1cfa4fea699dc996e67c3a4db49b4c4ed6e63329492ee6cf8f4f7059cf0

Score
10/10

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

Family

ryuk

Ransom Note
[email protected] balance of shadow universe Ryuk

Signatures

  • Ryuk

    Ransomware distributed via existing botnets, often Trickbot or Emotet.

  • Executes dropped EXE 1 IoCs
  • Loads dropped DLL 2 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 9 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of WriteProcessMemory 64 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\4b5b08346e369b59cae2120fcdc16b720bf2f2ec74115045cfafc24eecccb539.exe
    "C:\Users\Admin\AppData\Local\Temp\4b5b08346e369b59cae2120fcdc16b720bf2f2ec74115045cfafc24eecccb539.exe"
    1⤵
    • Loads dropped DLL
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:1916
    • C:\Users\Admin\AppData\Local\Temp\JukCrnS.exe
      "C:\Users\Admin\AppData\Local\Temp\JukCrnS.exe" 8 LAN
      2⤵
      • Executes dropped EXE
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:520
      • C:\Windows\SysWOW64\net.exe
        "C:\Windows\System32\net.exe" stop "samss" /y
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:2544
        • C:\Windows\SysWOW64\net1.exe
          C:\Windows\system32\net1 stop "samss" /y
          4⤵
            PID:2568
        • C:\Windows\SysWOW64\net.exe
          "C:\Windows\System32\net.exe" stop "samss" /y
          3⤵
            PID:9468
            • C:\Windows\SysWOW64\net1.exe
              C:\Windows\system32\net1 stop "samss" /y
              4⤵
                PID:9492
            • C:\Windows\SysWOW64\net.exe
              "C:\Windows\System32\net.exe" stop "samss" /y
              3⤵
                PID:23592
                • C:\Windows\SysWOW64\net1.exe
                  C:\Windows\system32\net1 stop "samss" /y
                  4⤵
                    PID:23632
              • C:\Windows\SysWOW64\net.exe
                "C:\Windows\System32\net.exe" stop "audioendpointbuilder" /y
                2⤵
                • Suspicious use of WriteProcessMemory
                PID:320
                • C:\Windows\SysWOW64\net1.exe
                  C:\Windows\system32\net1 stop "audioendpointbuilder" /y
                  3⤵
                    PID:548
                • C:\Windows\SysWOW64\net.exe
                  "C:\Windows\System32\net.exe" stop "samss" /y
                  2⤵
                  • Suspicious use of WriteProcessMemory
                  PID:536
                  • C:\Windows\SysWOW64\net1.exe
                    C:\Windows\system32\net1 stop "samss" /y
                    3⤵
                      PID:1516
                  • C:\Windows\SysWOW64\net.exe
                    "C:\Windows\System32\net.exe" stop "audioendpointbuilder" /y
                    2⤵
                    • Suspicious use of WriteProcessMemory
                    PID:928
                    • C:\Windows\SysWOW64\net1.exe
                      C:\Windows\system32\net1 stop "audioendpointbuilder" /y
                      3⤵
                        PID:512
                    • C:\Windows\SysWOW64\net.exe
                      "C:\Windows\System32\net.exe" stop "samss" /y
                      2⤵
                      • Suspicious use of WriteProcessMemory
                      PID:860
                      • C:\Windows\SysWOW64\net1.exe
                        C:\Windows\system32\net1 stop "samss" /y
                        3⤵
                          PID:1452
                      • C:\Windows\SysWOW64\net.exe
                        "C:\Windows\System32\net.exe" stop "samss" /y
                        2⤵
                        • Suspicious use of WriteProcessMemory
                        PID:1456
                        • C:\Windows\SysWOW64\net1.exe
                          C:\Windows\system32\net1 stop "samss" /y
                          3⤵
                            PID:9400
                        • C:\Windows\SysWOW64\net.exe
                          "C:\Windows\System32\net.exe" stop "samss" /y
                          2⤵
                          • Suspicious use of WriteProcessMemory
                          PID:2700
                          • C:\Windows\SysWOW64\net1.exe
                            C:\Windows\system32\net1 stop "samss" /y
                            3⤵
                              PID:9408
                          • C:\Windows\SysWOW64\net.exe
                            "C:\Windows\System32\net.exe" stop "samss" /y
                            2⤵
                              PID:24528
                              • C:\Windows\SysWOW64\net1.exe
                                C:\Windows\system32\net1 stop "samss" /y
                                3⤵
                                  PID:24568
                              • C:\Windows\SysWOW64\net.exe
                                "C:\Windows\System32\net.exe" stop "samss" /y
                                2⤵
                                  PID:24520
                                  • C:\Windows\SysWOW64\net1.exe
                                    C:\Windows\system32\net1 stop "samss" /y
                                    3⤵
                                      PID:23568

                                Network

                                MITRE ATT&CK Enterprise v6

                                Replay Monitor

                                Loading Replay Monitor...

                                Downloads

                                • memory/1916-54-0x0000000075761000-0x0000000075763000-memory.dmp

                                  Filesize

                                  8KB