Analysis

  • max time kernel
    179s
  • max time network
    197s
  • platform
    windows7_x64
  • resource
    win7-20240221-en
  • resource tags

    arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
  • submitted
    13/03/2024, 02:42

General

  • Target

    c4c585bbf04113bba793972a6825bcf7.exe

  • Size

    12.8MB

  • MD5

    c4c585bbf04113bba793972a6825bcf7

  • SHA1

    a6c2b02e2949b25a84f96136794299ca4bfd9f4e

  • SHA256

    4043c471bb101ba5705f35adce9a06603af390b5596fe3a338d5a36e7bd845b8

  • SHA512

    9c537400b2981d5c591aa462cde7b289c278fcb884c0a0e55dd89d8ac2d7b1408596e9c3085166bd5fd74e8fac9522bf327d877164f6d41588bf4d0fe835e93d

  • SSDEEP

    12288:3udiizJsed1efCc6hAKOFCaUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUY:3udiiNRc6E

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\c4c585bbf04113bba793972a6825bcf7.exe
    "C:\Users\Admin\AppData\Local\Temp\c4c585bbf04113bba793972a6825bcf7.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:1740
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\kcpnoqr\
      2⤵
        PID:2572
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\bbytwnew.exe" C:\Windows\SysWOW64\kcpnoqr\
        2⤵
          PID:2832
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create kcpnoqr binPath= "C:\Windows\SysWOW64\kcpnoqr\bbytwnew.exe /d\"C:\Users\Admin\AppData\Local\Temp\c4c585bbf04113bba793972a6825bcf7.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:2604
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description kcpnoqr "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:2656
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start kcpnoqr
          2⤵
          • Launches sc.exe
          PID:2472
        • 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:2988
      • C:\Windows\SysWOW64\kcpnoqr\bbytwnew.exe
        C:\Windows\SysWOW64\kcpnoqr\bbytwnew.exe /d"C:\Users\Admin\AppData\Local\Temp\c4c585bbf04113bba793972a6825bcf7.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:2720
        • C:\Windows\SysWOW64\svchost.exe
          svchost.exe
          2⤵
          • Windows security bypass
          • Sets service image path in registry
          • Deletes itself
          PID:1848

      Network

            MITRE ATT&CK Enterprise v15

            Replay Monitor

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            Downloads

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

              Filesize

              234KB

              MD5

              ae92f36000f8fcc03cfb97d696307c37

              SHA1

              3927115840ae828ef70587266d037e94129ff81e

              SHA256

              1ecea14da1ee535f5f099727671737789cf99cef02197fdc70f12ca31340609f

              SHA512

              5f43274a243e846b2f18c9fdcb16fb1a1cd595a16c546d960de0bf044b5d8946270d876a692e1642c29bd73e91d07b274e8a9421de74359f8b29eb10d507cc51

            • C:\Windows\SysWOW64\kcpnoqr\bbytwnew.exe

              Filesize

              2.1MB

              MD5

              bf3eb5cf46c71ba25e1863d13e5235e7

              SHA1

              9c2090cea575379b3912254f313ba5c6254bdd25

              SHA256

              5d88988d775486b01d339fda6659f17cdf604fc0cb7b8cc61ccacb83ef956ba6

              SHA512

              b37ee2113e5b1acaec5770311408f2e6f4039ea1d99fe387bffe9c6bc51b9c9af2427512f754e6be348d306a66265746b1ae11aad7b8ef47f56f2c236b9a72d3

            • memory/1740-1-0x00000000032F0000-0x00000000033F0000-memory.dmp

              Filesize

              1024KB

            • memory/1740-2-0x0000000000220000-0x0000000000233000-memory.dmp

              Filesize

              76KB

            • memory/1740-4-0x0000000000400000-0x000000000324C000-memory.dmp

              Filesize

              46.3MB

            • memory/1740-6-0x0000000000400000-0x000000000324C000-memory.dmp

              Filesize

              46.3MB

            • memory/1740-7-0x0000000000220000-0x0000000000233000-memory.dmp

              Filesize

              76KB

            • memory/1848-11-0x0000000000080000-0x0000000000095000-memory.dmp

              Filesize

              84KB

            • memory/1848-12-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

              Filesize

              4KB

            • memory/1848-14-0x0000000000080000-0x0000000000095000-memory.dmp

              Filesize

              84KB

            • memory/1848-17-0x0000000000080000-0x0000000000095000-memory.dmp

              Filesize

              84KB

            • memory/1848-20-0x0000000000080000-0x0000000000095000-memory.dmp

              Filesize

              84KB

            • memory/1848-21-0x0000000000080000-0x0000000000095000-memory.dmp

              Filesize

              84KB

            • memory/1848-22-0x0000000000080000-0x0000000000095000-memory.dmp

              Filesize

              84KB

            • memory/2720-10-0x00000000033D0000-0x00000000034D0000-memory.dmp

              Filesize

              1024KB

            • memory/2720-19-0x0000000000400000-0x000000000324C000-memory.dmp

              Filesize

              46.3MB

            • memory/2720-18-0x0000000000400000-0x000000000324C000-memory.dmp

              Filesize

              46.3MB