Analysis

  • max time kernel
    149s
  • max time network
    147s
  • platform
    windows7_x64
  • resource
    win7-20240221-en
  • resource tags

    arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
  • submitted
    25/03/2024, 17:32

General

  • Target

    de90eba22fa484e92a72c6834f6361a3.exe

  • Size

    13.5MB

  • MD5

    de90eba22fa484e92a72c6834f6361a3

  • SHA1

    97c0be0a75a5dba4e7f41a46cad23ed2bb705e2f

  • SHA256

    cb9dbbefdefc8029972629da6dc5f67bb76d6d2a71fe87f567551ef85dbbd2ff

  • SHA512

    ab2b80853123a972ded15d1d4d56c2f9393f24800a6ae07e4756daf40c6a77be2347ea2f05a2eb76fc4f2671c818999e6ecdf53e63d58fbaea588ca14dafc50f

  • SSDEEP

    12288:Lz5RuW/D2OpqMtGHo/zDq1ousycoJl//////////////////////////////////:qW/D2o5/Hq11coJ

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\de90eba22fa484e92a72c6834f6361a3.exe
    "C:\Users\Admin\AppData\Local\Temp\de90eba22fa484e92a72c6834f6361a3.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:328
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\vfhywgap\
      2⤵
        PID:2328
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\gyhpmzlf.exe" C:\Windows\SysWOW64\vfhywgap\
        2⤵
          PID:3052
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create vfhywgap binPath= "C:\Windows\SysWOW64\vfhywgap\gyhpmzlf.exe /d\"C:\Users\Admin\AppData\Local\Temp\de90eba22fa484e92a72c6834f6361a3.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:2140
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description vfhywgap "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:2316
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start vfhywgap
          2⤵
          • Launches sc.exe
          PID:2648
        • 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:2608
      • C:\Windows\SysWOW64\vfhywgap\gyhpmzlf.exe
        C:\Windows\SysWOW64\vfhywgap\gyhpmzlf.exe /d"C:\Users\Admin\AppData\Local\Temp\de90eba22fa484e92a72c6834f6361a3.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:848
        • C:\Windows\SysWOW64\svchost.exe
          svchost.exe
          2⤵
          • Windows security bypass
          • Sets service image path in registry
          • Deletes itself
          PID:2620

      Network

      MITRE ATT&CK Enterprise v15

      Replay Monitor

      Loading Replay Monitor...

      Downloads

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

        Filesize

        12.4MB

        MD5

        c1234fed0876a3b54edc0136780b962d

        SHA1

        63abd668a36bba65272a466adb361e8087ebf607

        SHA256

        0d6600a3467bbd645e72b2c630fc152c440c9278aacf05825547720c31bce0ae

        SHA512

        ea68f7d9c4168f69274cd44d668fad584b7be1709f4c210e4b8cf242fb0caebb884369d42ac657bfd1d19c55b282dc1f4e810cafaa3a1a8396fed5cdb2246dde

      • memory/328-2-0x00000000004F0000-0x00000000005F0000-memory.dmp

        Filesize

        1024KB

      • memory/328-3-0x00000000002B0000-0x00000000002C3000-memory.dmp

        Filesize

        76KB

      • memory/328-4-0x0000000000400000-0x000000000046D000-memory.dmp

        Filesize

        436KB

      • memory/328-8-0x0000000000400000-0x000000000046D000-memory.dmp

        Filesize

        436KB

      • memory/328-9-0x00000000004F0000-0x00000000005F0000-memory.dmp

        Filesize

        1024KB

      • memory/848-11-0x00000000005B0000-0x00000000006B0000-memory.dmp

        Filesize

        1024KB

      • memory/848-13-0x0000000000400000-0x000000000046D000-memory.dmp

        Filesize

        436KB

      • memory/848-18-0x0000000000400000-0x000000000046D000-memory.dmp

        Filesize

        436KB

      • memory/2620-12-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

        Filesize

        4KB

      • memory/2620-10-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB

      • memory/2620-15-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB

      • memory/2620-20-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB

      • memory/2620-19-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB

      • memory/2620-21-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB

      • memory/2620-22-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB