Analysis

  • max time kernel
    144s
  • max time network
    150s
  • platform
    windows7_x64
  • resource
    win7-20240221-en
  • resource tags

    arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
  • submitted
    06-05-2024 09:21

General

  • Target

    cc4961f20bc142b7f874d38b3b4179a03b428c8348eaa177c57579673ea0624e.exe

  • Size

    10.0MB

  • MD5

    19f2564fe3b3636567957a0b29a78ac5

  • SHA1

    f4d8c30d67b9dad6bca7a703bb42578135fc966b

  • SHA256

    cc4961f20bc142b7f874d38b3b4179a03b428c8348eaa177c57579673ea0624e

  • SHA512

    962c4c8bd1966f6e742e60625e326f112fd0eed2d045bab0c3dee92505982e11ef7cc71da2af22251ec580cfc77e50640e47dd7e81082f04973e53aa2d914b83

  • SSDEEP

    6144:rzH/2P/6m1uCQ/RqO+Wy+PqSb0iXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX:rT/2P/6m1uCQMO+W1Cx

Malware Config

Extracted

Family

tofsee

C2

svartalfheim.top

jotunheim.name

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) 2 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
  • Drops file in System32 directory 2 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).

  • Modifies data under HKEY_USERS 6 IoCs
  • Suspicious use of WriteProcessMemory 30 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\cc4961f20bc142b7f874d38b3b4179a03b428c8348eaa177c57579673ea0624e.exe
    "C:\Users\Admin\AppData\Local\Temp\cc4961f20bc142b7f874d38b3b4179a03b428c8348eaa177c57579673ea0624e.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:2236
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\ylowaepo\
      2⤵
        PID:2928
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\pfywtcji.exe" C:\Windows\SysWOW64\ylowaepo\
        2⤵
          PID:3040
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create ylowaepo binPath= "C:\Windows\SysWOW64\ylowaepo\pfywtcji.exe /d\"C:\Users\Admin\AppData\Local\Temp\cc4961f20bc142b7f874d38b3b4179a03b428c8348eaa177c57579673ea0624e.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:2576
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description ylowaepo "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:2552
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start ylowaepo
          2⤵
          • Launches sc.exe
          PID:2588
        • 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:3016
      • C:\Windows\SysWOW64\ylowaepo\pfywtcji.exe
        C:\Windows\SysWOW64\ylowaepo\pfywtcji.exe /d"C:\Users\Admin\AppData\Local\Temp\cc4961f20bc142b7f874d38b3b4179a03b428c8348eaa177c57579673ea0624e.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:2452
        • C:\Windows\SysWOW64\svchost.exe
          svchost.exe
          2⤵
          • Windows security bypass
          • Sets service image path in registry
          • Deletes itself
          • Drops file in System32 directory
          • Modifies data under HKEY_USERS
          PID:2504

      Network

      MITRE ATT&CK Enterprise v15

      Replay Monitor

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      Downloads

      • C:\Users\Admin\AppData\Local\Temp\pfywtcji.exe
        Filesize

        14.2MB

        MD5

        8131c999e7397a5fac1540452565dcf1

        SHA1

        85ac54f0448b65ee4c835d3d30c40e657abf2d92

        SHA256

        382889468a6373f91912c6c10e3b0242859d525a8d01e0b45922228150d6fd0d

        SHA512

        1aee55b31f4b609d257a61ce1a34ad805c4965e14f40957417b492c89886870a99ad2a69fc8711bd03ff027f148652112dde129cc02318340a3c54d2937d8c4e

      • memory/2236-2-0x00000000001C0000-0x00000000001D3000-memory.dmp
        Filesize

        76KB

      • memory/2236-3-0x0000000000400000-0x0000000000415000-memory.dmp
        Filesize

        84KB

      • memory/2236-10-0x0000000000400000-0x0000000000415000-memory.dmp
        Filesize

        84KB

      • memory/2236-9-0x00000000001C0000-0x00000000001D3000-memory.dmp
        Filesize

        76KB

      • memory/2236-8-0x0000000000400000-0x0000000002C2E000-memory.dmp
        Filesize

        40.2MB

      • memory/2236-1-0x00000000002B0000-0x00000000003B0000-memory.dmp
        Filesize

        1024KB

      • memory/2452-15-0x0000000000400000-0x0000000002C2E000-memory.dmp
        Filesize

        40.2MB

      • memory/2504-51-0x0000000005640000-0x0000000005A4B000-memory.dmp
        Filesize

        4.0MB

      • memory/2504-45-0x0000000000160000-0x0000000000170000-memory.dmp
        Filesize

        64KB

      • memory/2504-13-0x000000007EFDE000-0x000000007EFDF000-memory.dmp
        Filesize

        4KB

      • memory/2504-18-0x0000000000080000-0x0000000000095000-memory.dmp
        Filesize

        84KB

      • memory/2504-17-0x0000000000080000-0x0000000000095000-memory.dmp
        Filesize

        84KB

      • memory/2504-27-0x0000000000160000-0x0000000000170000-memory.dmp
        Filesize

        64KB

      • memory/2504-20-0x0000000001CB0000-0x0000000001EBF000-memory.dmp
        Filesize

        2.1MB

      • memory/2504-24-0x0000000000110000-0x0000000000116000-memory.dmp
        Filesize

        24KB

      • memory/2504-33-0x0000000000160000-0x0000000000170000-memory.dmp
        Filesize

        64KB

      • memory/2504-31-0x0000000000160000-0x0000000000170000-memory.dmp
        Filesize

        64KB

      • memory/2504-11-0x0000000000080000-0x0000000000095000-memory.dmp
        Filesize

        84KB

      • memory/2504-55-0x0000000000180000-0x0000000000187000-memory.dmp
        Filesize

        28KB

      • memory/2504-50-0x0000000000170000-0x0000000000175000-memory.dmp
        Filesize

        20KB

      • memory/2504-47-0x0000000000170000-0x0000000000175000-memory.dmp
        Filesize

        20KB

      • memory/2504-46-0x0000000000160000-0x0000000000170000-memory.dmp
        Filesize

        64KB

      • memory/2504-14-0x0000000000080000-0x0000000000095000-memory.dmp
        Filesize

        84KB

      • memory/2504-44-0x0000000000160000-0x0000000000170000-memory.dmp
        Filesize

        64KB

      • memory/2504-43-0x0000000000160000-0x0000000000170000-memory.dmp
        Filesize

        64KB

      • memory/2504-42-0x0000000000160000-0x0000000000170000-memory.dmp
        Filesize

        64KB

      • memory/2504-41-0x0000000000160000-0x0000000000170000-memory.dmp
        Filesize

        64KB

      • memory/2504-40-0x0000000000160000-0x0000000000170000-memory.dmp
        Filesize

        64KB

      • memory/2504-39-0x0000000000160000-0x0000000000170000-memory.dmp
        Filesize

        64KB

      • memory/2504-38-0x0000000000160000-0x0000000000170000-memory.dmp
        Filesize

        64KB

      • memory/2504-37-0x0000000000160000-0x0000000000170000-memory.dmp
        Filesize

        64KB

      • memory/2504-36-0x0000000000160000-0x0000000000170000-memory.dmp
        Filesize

        64KB

      • memory/2504-35-0x0000000000160000-0x0000000000170000-memory.dmp
        Filesize

        64KB

      • memory/2504-34-0x0000000000160000-0x0000000000170000-memory.dmp
        Filesize

        64KB

      • memory/2504-32-0x0000000000160000-0x0000000000170000-memory.dmp
        Filesize

        64KB

      • memory/2504-30-0x0000000000160000-0x0000000000170000-memory.dmp
        Filesize

        64KB

      • memory/2504-23-0x0000000001CB0000-0x0000000001EBF000-memory.dmp
        Filesize

        2.1MB

      • memory/2504-54-0x0000000005640000-0x0000000005A4B000-memory.dmp
        Filesize

        4.0MB