Analysis

  • max time kernel
    146s
  • max time network
    145s
  • platform
    windows7_x64
  • resource
    win7-20240221-en
  • resource tags

    arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
  • submitted
    26/03/2024, 09:31

General

  • Target

    ded6c7b76f7807e102b6cf167e23ac66.exe

  • Size

    11.2MB

  • MD5

    ded6c7b76f7807e102b6cf167e23ac66

  • SHA1

    4011583cb42fedee6663e34ca1930c8785935a75

  • SHA256

    7e4daedee73d2c6f9f78a81907713020b2cfa818e1b2a4836c44e8e8d7276be8

  • SHA512

    4fd2339f4590f8420a9ebf0c56ab498587fd31fde057cf31c880b95d011f5f1e6212a9c1669d6448245fc91f86a18da7d3c137f7152dc3bed97c13d2860556e8

  • SSDEEP

    24576:yUqa71YB5DHlommmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmX:yF15

Malware Config

Extracted

Family

tofsee

C2

defeatwax.ru

refabyd.info

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\ded6c7b76f7807e102b6cf167e23ac66.exe
    "C:\Users\Admin\AppData\Local\Temp\ded6c7b76f7807e102b6cf167e23ac66.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:2196
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\zirxpnim\
      2⤵
        PID:2176
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\cczuxofx.exe" C:\Windows\SysWOW64\zirxpnim\
        2⤵
          PID:2532
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create zirxpnim binPath= "C:\Windows\SysWOW64\zirxpnim\cczuxofx.exe /d\"C:\Users\Admin\AppData\Local\Temp\ded6c7b76f7807e102b6cf167e23ac66.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:2716
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description zirxpnim "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:2548
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start zirxpnim
          2⤵
          • Launches sc.exe
          PID:2444
        • 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:2472
      • C:\Windows\SysWOW64\zirxpnim\cczuxofx.exe
        C:\Windows\SysWOW64\zirxpnim\cczuxofx.exe /d"C:\Users\Admin\AppData\Local\Temp\ded6c7b76f7807e102b6cf167e23ac66.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:2760
        • C:\Windows\SysWOW64\svchost.exe
          svchost.exe
          2⤵
          • Windows security bypass
          • Sets service image path in registry
          • Deletes itself
          PID:2432

      Network

      MITRE ATT&CK Enterprise v15

      Replay Monitor

      Loading Replay Monitor...

      Downloads

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

        Filesize

        12.4MB

        MD5

        ebe849d933e372fa2d048e847b0e7b68

        SHA1

        bb0024ec55a181e84452255bd4efa1b8a518578e

        SHA256

        1a2691e44d6173f203200ac09b03acd72120e5e14957e731ad5bb8b99a205b2f

        SHA512

        9fc162e8e24c47b3f3602395f4ab038f73e5820f2a8c06e6ffa91a70fa3c018a2248757965bf4be9ae05fdf824b52d111bfb11097f1f039bbb27970324da76a4

      • memory/2196-1-0x00000000002B0000-0x00000000003B0000-memory.dmp

        Filesize

        1024KB

      • memory/2196-2-0x00000000001B0000-0x00000000001C3000-memory.dmp

        Filesize

        76KB

      • memory/2196-3-0x0000000000400000-0x0000000000468000-memory.dmp

        Filesize

        416KB

      • memory/2196-8-0x0000000000400000-0x0000000000468000-memory.dmp

        Filesize

        416KB

      • memory/2196-9-0x00000000001B0000-0x00000000001C3000-memory.dmp

        Filesize

        76KB

      • memory/2432-19-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB

      • memory/2432-15-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB

      • memory/2432-13-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

        Filesize

        4KB

      • memory/2432-12-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB

      • memory/2432-20-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB

      • memory/2432-21-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB

      • memory/2432-22-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB

      • memory/2760-16-0x0000000000400000-0x0000000000468000-memory.dmp

        Filesize

        416KB

      • memory/2760-11-0x0000000000400000-0x0000000000468000-memory.dmp

        Filesize

        416KB

      • memory/2760-10-0x00000000002B0000-0x00000000003B0000-memory.dmp

        Filesize

        1024KB