Resubmissions

12-04-2024 22:28

240412-2d43lsfe55 10

Analysis

  • max time kernel
    74s
  • max time network
    23s
  • platform
    windows7_x64
  • resource
    win7-20240221-en
  • resource tags

    arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
  • submitted
    13-04-2024 16:50

General

  • Target

    MrsMajor3.0.exe

  • Size

    381KB

  • MD5

    35a27d088cd5be278629fae37d464182

  • SHA1

    d5a291fadead1f2a0cf35082012fe6f4bf22a3ab

  • SHA256

    4a75f2db1dbd3c1218bb9994b7e1c690c4edd4e0c1a675de8d2a127611173e69

  • SHA512

    eb0be3026321864bd5bcf53b88dc951711d8c0b4bcbd46800b90ca5116a56dba22452530e29f3ccbbcc43d943bdefc8ed8ca2d31ba2e7e5f0e594f74adba4ab5

  • SSDEEP

    6144:Th3idhONY259BH1DzJ5PzVNtGgc+F9TBd096cTKAsLEbqqbd+VWM8AHiKn9SlXNA:Th3iXPw9Tc6kVXMHHLEf8l7

Score
10/10

Malware Config

Signatures

  • UAC bypass 3 TTPs 2 IoCs
  • Executes dropped EXE 4 IoCs
  • Loads dropped DLL 4 IoCs
  • Obfuscated with Agile.Net obfuscator 9 IoCs

    Detects use of the Agile.Net commercial obfuscator, which is capable of entity renaming and control flow obfuscation.

  • Enumerates physical storage devices 1 TTPs

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

  • Suspicious behavior: EnumeratesProcesses 4 IoCs
  • Suspicious use of AdjustPrivilegeToken 4 IoCs
  • Suspicious use of FindShellTrayWindow 2 IoCs
  • Suspicious use of WriteProcessMemory 12 IoCs
  • System policy modification 1 TTPs 4 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\MrsMajor3.0.exe
    "C:\Users\Admin\AppData\Local\Temp\MrsMajor3.0.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:2280
    • C:\Windows\system32\wscript.exe
      "C:\Windows\system32\wscript.exe" C:\Users\Admin\AppData\Local\Temp\454.tmp\455.tmp\456.vbs //Nologo
      2⤵
      • UAC bypass
      • Suspicious use of WriteProcessMemory
      • System policy modification
      PID:1636
      • C:\Users\Admin\AppData\Local\Temp\454.tmp\eulascr.exe
        "C:\Users\Admin\AppData\Local\Temp\454.tmp\eulascr.exe"
        3⤵
        • Executes dropped EXE
        • Loads dropped DLL
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of FindShellTrayWindow
        PID:2520
  • C:\Windows\explorer.exe
    "C:\Windows\explorer.exe"
    1⤵
      PID:2476
    • C:\Windows\system32\wermgr.exe
      "C:\Windows\system32\wermgr.exe" "-outproc" "1104" "3592"
      1⤵
        PID:1192
      • C:\Users\Admin\AppData\Local\Temp\454.tmp\eulascr.exe
        "C:\Users\Admin\AppData\Local\Temp\454.tmp\eulascr.exe"
        1⤵
        • Executes dropped EXE
        • Loads dropped DLL
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        PID:1512
      • C:\Windows\system32\wermgr.exe
        "C:\Windows\system32\wermgr.exe" "-outproc" "1104" "3808"
        1⤵
          PID:2944
        • C:\Users\Admin\AppData\Local\Temp\454.tmp\eulascr.exe
          "C:\Users\Admin\AppData\Local\Temp\454.tmp\eulascr.exe"
          1⤵
          • Executes dropped EXE
          • Loads dropped DLL
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          PID:268
        • C:\Users\Admin\AppData\Local\Temp\MrsMajor3.0.exe
          "C:\Users\Admin\AppData\Local\Temp\MrsMajor3.0.exe"
          1⤵
          • Suspicious use of WriteProcessMemory
          PID:3016
          • C:\Windows\system32\wscript.exe
            "C:\Windows\system32\wscript.exe" C:\Users\Admin\AppData\Local\Temp\13FE.tmp\13FF.tmp\1400.vbs //Nologo
            2⤵
            • UAC bypass
            • Suspicious use of WriteProcessMemory
            • System policy modification
            PID:304
            • C:\Users\Admin\AppData\Local\Temp\13FE.tmp\eulascr.exe
              "C:\Users\Admin\AppData\Local\Temp\13FE.tmp\eulascr.exe"
              3⤵
              • Executes dropped EXE
              • Loads dropped DLL
              • Suspicious behavior: EnumeratesProcesses
              • Suspicious use of AdjustPrivilegeToken
              PID:1540

        Network

        MITRE ATT&CK Matrix ATT&CK v13

        Privilege Escalation

        Abuse Elevation Control Mechanism

        1
        T1548

        Bypass User Account Control

        1
        T1548.002

        Defense Evasion

        Abuse Elevation Control Mechanism

        1
        T1548

        Bypass User Account Control

        1
        T1548.002

        Impair Defenses

        1
        T1562

        Disable or Modify Tools

        1
        T1562.001

        Modify Registry

        2
        T1112

        Discovery

        System Information Discovery

        1
        T1082

        Replay Monitor

        Loading Replay Monitor...

        Downloads

        • C:\Users\Admin\AppData\Local\Temp\454.tmp\455.tmp\456.vbs
          Filesize

          352B

          MD5

          3b8696ecbb737aad2a763c4eaf62c247

          SHA1

          4a2d7a2d61d3f4c414b4e5d2933cd404b8f126e5

          SHA256

          ce95f7eea8b303bc23cfd6e41748ad4e7b5e0f0f1d3bdf390eadb1e354915569

          SHA512

          713d9697b892b9dd892537e8a01eab8d0265ebf64867c8beecf7a744321257c2a5c11d4de18fcb486bb69f199422ce3cab8b6afdbe880481c47b06ba8f335beb

        • C:\Users\Admin\AppData\Local\Temp\454.tmp\eulascr.exe
          Filesize

          143KB

          MD5

          8b1c352450e480d9320fce5e6f2c8713

          SHA1

          d6bd88bf33de7c5d4e68b233c37cc1540c97bd3a

          SHA256

          2c343174231b55e463ca044d19d47bd5842793c15954583eb340bfd95628516e

          SHA512

          2d8e43b1021da08ed1bf5aff110159e6bc10478102c024371302ccfce595e77fd76794658617b5b52f9a50190db250c1ba486d247d9cd69e4732a768edbb4cbc

        • \Users\Admin\AppData\Local\Temp\5a530dfd-bc51-4992-a05d-f09d41a331d4\AgileDotNetRT64.dll
          Filesize

          75KB

          MD5

          42b2c266e49a3acd346b91e3b0e638c0

          SHA1

          2bc52134f03fcc51cb4e0f6c7cf70646b4df7dd1

          SHA256

          adeed015f06efa363d504a18acb671b1db4b20b23664a55c9bc28aef3283ca29

          SHA512

          770822fd681a1d98afe03f6fbe5f116321b54c8e2989fb07491811fd29fca5b666f1adf4c6900823af1271e342cacc9293e9db307c4eef852d1a253b00347a81

        • memory/268-38-0x000007FEF51E0000-0x000007FEF5BCC000-memory.dmp
          Filesize

          9.9MB

        • memory/268-37-0x000000001B560000-0x000000001B5E0000-memory.dmp
          Filesize

          512KB

        • memory/268-36-0x000000001B560000-0x000000001B5E0000-memory.dmp
          Filesize

          512KB

        • memory/268-35-0x000000001B560000-0x000000001B5E0000-memory.dmp
          Filesize

          512KB

        • memory/268-34-0x000007FEF3A20000-0x000007FEF3B4C000-memory.dmp
          Filesize

          1.2MB

        • memory/268-33-0x000007FEF51E0000-0x000007FEF5BCC000-memory.dmp
          Filesize

          9.9MB

        • memory/268-31-0x0000000000060000-0x000000000008A000-memory.dmp
          Filesize

          168KB

        • memory/1512-28-0x0000000000CB0000-0x0000000000D30000-memory.dmp
          Filesize

          512KB

        • memory/1512-26-0x000007FEF3AC0000-0x000007FEF3BEC000-memory.dmp
          Filesize

          1.2MB

        • memory/1512-23-0x0000000000CB0000-0x0000000000D30000-memory.dmp
          Filesize

          512KB

        • memory/1512-27-0x0000000000CB0000-0x0000000000D30000-memory.dmp
          Filesize

          512KB

        • memory/1512-21-0x00000000013E0000-0x000000000140A000-memory.dmp
          Filesize

          168KB

        • memory/1512-29-0x000007FEF5280000-0x000007FEF5C6C000-memory.dmp
          Filesize

          9.9MB

        • memory/1512-22-0x000007FEF5280000-0x000007FEF5C6C000-memory.dmp
          Filesize

          9.9MB

        • memory/1540-48-0x000007FEF5670000-0x000007FEF605C000-memory.dmp
          Filesize

          9.9MB

        • memory/1540-47-0x00000000000A0000-0x00000000000CA000-memory.dmp
          Filesize

          168KB

        • memory/1540-50-0x000000001ACE0000-0x000000001AD60000-memory.dmp
          Filesize

          512KB

        • memory/1540-51-0x000007FEF3EB0000-0x000007FEF3FDC000-memory.dmp
          Filesize

          1.2MB

        • memory/1540-52-0x000000001ACE0000-0x000000001AD60000-memory.dmp
          Filesize

          512KB

        • memory/1540-53-0x000007FEF5670000-0x000007FEF605C000-memory.dmp
          Filesize

          9.9MB

        • memory/2520-18-0x000000001AFB0000-0x000000001B030000-memory.dmp
          Filesize

          512KB

        • memory/2520-17-0x000007FEF45B0000-0x000007FEF46DC000-memory.dmp
          Filesize

          1.2MB

        • memory/2520-10-0x000000001AFB0000-0x000000001B030000-memory.dmp
          Filesize

          512KB

        • memory/2520-9-0x000007FEF5C70000-0x000007FEF665C000-memory.dmp
          Filesize

          9.9MB

        • memory/2520-8-0x0000000000B60000-0x0000000000B8A000-memory.dmp
          Filesize

          168KB

        • memory/2520-19-0x000007FEF5C70000-0x000007FEF665C000-memory.dmp
          Filesize

          9.9MB