Analysis

  • max time kernel
    142s
  • max time network
    123s
  • platform
    windows7_x64
  • resource
    win7-20240221-en
  • resource tags

    arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
  • submitted
    18-04-2024 14:24

General

  • Target

    f82fcc6b28d0ae7b42e6a6a123913719_JaffaCakes118.exe

  • Size

    11.5MB

  • MD5

    f82fcc6b28d0ae7b42e6a6a123913719

  • SHA1

    ca5b8c2a36e2baa53082673f78f65b402182d2bd

  • SHA256

    3d75c4f3de4c59779cd84d9b938445948a257b5dbe6d291ce64b98d7e0b5e80d

  • SHA512

    109cb309682d2761bb7d03a2a52718d83f4cc8d437c33dcda17a055c41e5b798057dc63bf3095c4652d0027e7d08d3fbcbfa6aa366dac308cc8926be08e9b4d7

  • SSDEEP

    49152:i3SkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkE:i3

Malware Config

Extracted

Family

tofsee

C2

43.231.4.6

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\f82fcc6b28d0ae7b42e6a6a123913719_JaffaCakes118.exe
    "C:\Users\Admin\AppData\Local\Temp\f82fcc6b28d0ae7b42e6a6a123913719_JaffaCakes118.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:756
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\pjcaoeug\
      2⤵
        PID:792
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\bbckqlnz.exe" C:\Windows\SysWOW64\pjcaoeug\
        2⤵
          PID:2264
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create pjcaoeug binPath= "C:\Windows\SysWOW64\pjcaoeug\bbckqlnz.exe /d\"C:\Users\Admin\AppData\Local\Temp\f82fcc6b28d0ae7b42e6a6a123913719_JaffaCakes118.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:2588
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description pjcaoeug "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:2552
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start pjcaoeug
          2⤵
          • Launches sc.exe
          PID:2560
        • 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:2820
      • C:\Windows\SysWOW64\pjcaoeug\bbckqlnz.exe
        C:\Windows\SysWOW64\pjcaoeug\bbckqlnz.exe /d"C:\Users\Admin\AppData\Local\Temp\f82fcc6b28d0ae7b42e6a6a123913719_JaffaCakes118.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:2472
        • C:\Windows\SysWOW64\svchost.exe
          svchost.exe
          2⤵
          • Windows security bypass
          • Sets service image path in registry
          • Deletes itself
          PID:2468

      Network

      MITRE ATT&CK Enterprise v15

      Replay Monitor

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      Downloads

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

        Filesize

        10.4MB

        MD5

        f150995159a29c2ed203dea7350b0117

        SHA1

        1a1382930694330fea33f3adea9a2abc72015ec2

        SHA256

        64e5b407e69fa8099e0a5ea0389dd1fb305acbb11e2a838deae0bae32dd5c174

        SHA512

        d48c41faa2a1dfbb108fa67fe9f017fb4946282c63044fdeb764e82f959c687a90caa8d1ae1937724b53d3f5af1efac93fc3920aacf43e0d26415c1dbca2fe82

      • memory/756-1-0x0000000000230000-0x0000000000330000-memory.dmp

        Filesize

        1024KB

      • memory/756-4-0x0000000000400000-0x0000000000C14000-memory.dmp

        Filesize

        8.1MB

      • memory/756-7-0x0000000000400000-0x0000000000C14000-memory.dmp

        Filesize

        8.1MB

      • memory/756-3-0x00000000003B0000-0x00000000003C3000-memory.dmp

        Filesize

        76KB

      • memory/2468-19-0x00000000000C0000-0x00000000000D5000-memory.dmp

        Filesize

        84KB

      • memory/2468-21-0x00000000000C0000-0x00000000000D5000-memory.dmp

        Filesize

        84KB

      • memory/2468-12-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

        Filesize

        4KB

      • memory/2468-14-0x00000000000C0000-0x00000000000D5000-memory.dmp

        Filesize

        84KB

      • memory/2468-20-0x00000000000C0000-0x00000000000D5000-memory.dmp

        Filesize

        84KB

      • memory/2468-11-0x00000000000C0000-0x00000000000D5000-memory.dmp

        Filesize

        84KB

      • memory/2468-18-0x00000000000C0000-0x00000000000D5000-memory.dmp

        Filesize

        84KB

      • memory/2472-10-0x0000000000400000-0x0000000000C14000-memory.dmp

        Filesize

        8.1MB

      • memory/2472-15-0x0000000000400000-0x0000000000C14000-memory.dmp

        Filesize

        8.1MB

      • memory/2472-9-0x0000000000250000-0x0000000000350000-memory.dmp

        Filesize

        1024KB