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Analysis

  • max time kernel
    150s
  • max time network
    124s
  • platform
    windows7_x64
  • resource
    win7-20240221-en
  • resource tags

    arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
  • submitted
    04/03/2024, 14:11

General

  • Target

    b253f5b8d1f9aad76587136d065831e2.exe

  • Size

    13.6MB

  • MD5

    b253f5b8d1f9aad76587136d065831e2

  • SHA1

    1b52e954d04c96a82e24f74ed38ab1136cdec4f6

  • SHA256

    789e9198d141f39bf030563420328dab4477ac3d60cc87244c6aac684f0aac5e

  • SHA512

    1ab9b1c968ab3ff32b9e8e19d1bd7d6cd1d19ae601ea86cf20eab684036c0b7a0464f45e36a46468c4684f84eb61217520ee14be862a72e5c075e4751c12a4c3

  • SSDEEP

    98304:cvjOF//////////////////////////////////////////////////////////H:m

Malware Config

Extracted

Family

tofsee

C2

43.231.4.7

lazystax.ru

Signatures

  • Tofsee

    Backdoor/botnet which carries out malicious activities based on commands from a C2 server.

  • Windows security bypass 2 TTPs 1 IoCs
  • Creates new service(s) 1 TTPs
  • Modifies Windows Firewall 2 TTPs 1 IoCs
  • Sets service image path in registry 2 TTPs 1 IoCs
  • Deletes itself 1 IoCs
  • Executes dropped EXE 1 IoCs
  • Suspicious use of SetThreadContext 1 IoCs
  • Launches sc.exe 3 IoCs

    Sc.exe is a Windows utlilty to control services on the system.

  • Enumerates physical storage devices 1 TTPs

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

  • Suspicious use of WriteProcessMemory 30 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\b253f5b8d1f9aad76587136d065831e2.exe
    "C:\Users\Admin\AppData\Local\Temp\b253f5b8d1f9aad76587136d065831e2.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:1964
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\rlmbqkh\
      2⤵
        PID:3000
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\kjxznkld.exe" C:\Windows\SysWOW64\rlmbqkh\
        2⤵
          PID:2936
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create rlmbqkh binPath= "C:\Windows\SysWOW64\rlmbqkh\kjxznkld.exe /d\"C:\Users\Admin\AppData\Local\Temp\b253f5b8d1f9aad76587136d065831e2.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:2552
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description rlmbqkh "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:2644
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start rlmbqkh
          2⤵
          • Launches sc.exe
          PID:2636
        • C:\Windows\SysWOW64\netsh.exe
          "C:\Windows\System32\netsh.exe" advfirewall firewall add rule name="Host-process for services of Windows" dir=in action=allow program="C:\Windows\SysWOW64\svchost.exe" enable=yes>nul
          2⤵
          • Modifies Windows Firewall
          PID:2420
      • C:\Windows\SysWOW64\rlmbqkh\kjxznkld.exe
        C:\Windows\SysWOW64\rlmbqkh\kjxznkld.exe /d"C:\Users\Admin\AppData\Local\Temp\b253f5b8d1f9aad76587136d065831e2.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:2564
        • C:\Windows\SysWOW64\svchost.exe
          svchost.exe
          2⤵
          • Windows security bypass
          • Sets service image path in registry
          • Deletes itself
          PID:2416

      Network

      MITRE ATT&CK Enterprise v15

      Replay Monitor

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      Downloads

      • C:\Users\Admin\AppData\Local\Temp\kjxznkld.exe

        Filesize

        11.8MB

        MD5

        6bc9cea76db6ad0504fbf8cf259cf247

        SHA1

        9840bb4ddcd9a253a4140181f41ca3d83c4e73af

        SHA256

        1a457a45c5f54eab9800ae26489e76d92ae8235abaa66c9bd0f7bbb6a26fd066

        SHA512

        92a747e42aa47af44f1a2fe75b38587f8b54a73aa47125a66c58d848a1e1f89c3c19d9e2be689ce0753b30f3c011ea6c8625c10e2f3d1452f4f94ca91b944f43

      • memory/1964-1-0x0000000000CA0000-0x0000000000DA0000-memory.dmp

        Filesize

        1024KB

      • memory/1964-3-0x00000000002B0000-0x00000000002C3000-memory.dmp

        Filesize

        76KB

      • memory/1964-4-0x0000000000400000-0x0000000000C1F000-memory.dmp

        Filesize

        8.1MB

      • memory/1964-7-0x0000000000400000-0x0000000000C1F000-memory.dmp

        Filesize

        8.1MB

      • memory/2416-14-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB

      • memory/2416-12-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

        Filesize

        4KB

      • memory/2416-11-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB

      • memory/2416-19-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB

      • memory/2416-20-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB

      • memory/2416-21-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB

      • memory/2564-10-0x0000000000400000-0x0000000000C1F000-memory.dmp

        Filesize

        8.1MB

      • memory/2564-9-0x00000000002F0000-0x00000000003F0000-memory.dmp

        Filesize

        1024KB

      • memory/2564-16-0x0000000000400000-0x0000000000C1F000-memory.dmp

        Filesize

        8.1MB