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Analysis

  • max time kernel
    149s
  • max time network
    151s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20241007-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
  • submitted
    23/12/2024, 14:35

General

  • Target

    JaffaCakes118_8e153af80a5bda2c33eac3b4dfba3fe2bffd0b7e5c2f8420e4a0c2472a68a861.exe

  • Size

    238KB

  • MD5

    408c1945565f2750805d4794738e9ac6

  • SHA1

    5337152dea98cc8689642d06b1dd401a36576dee

  • SHA256

    8e153af80a5bda2c33eac3b4dfba3fe2bffd0b7e5c2f8420e4a0c2472a68a861

  • SHA512

    2ca65d40c0984003654c6f49f1258ac584b742932e2b5935d0d197d8771ea6e75a12aafc9983c9dee2ba318786be9d7def38690ee7bd2b0a875e61b601afd613

  • SSDEEP

    6144:p3ZQq23DLJtr0Cl20X3pZxbkToSdx5pgG5H:BZWJtrPlVZxoESJn

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.

  • Tofsee family
  • Creates new service(s) 2 TTPs
  • Modifies Windows Firewall 2 TTPs 1 IoCs
  • Sets service image path in registry 2 TTPs 1 IoCs
  • Checks computer location settings 2 TTPs 1 IoCs

    Looks up country code configured in the registry, likely geofence.

  • 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).

  • Event Triggered Execution: Netsh Helper DLL 1 TTPs 3 IoCs

    Netsh.exe (also referred to as Netshell) is a command-line scripting utility used to interact with the network configuration of a system.

  • Program crash 2 IoCs
  • System Location Discovery: System Language Discovery 1 TTPs 9 IoCs

    Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

  • Suspicious use of WriteProcessMemory 23 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_8e153af80a5bda2c33eac3b4dfba3fe2bffd0b7e5c2f8420e4a0c2472a68a861.exe
    "C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_8e153af80a5bda2c33eac3b4dfba3fe2bffd0b7e5c2f8420e4a0c2472a68a861.exe"
    1⤵
    • Checks computer location settings
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:1216
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\sswsfeuq\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:3332
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\jmfnlnvf.exe" C:\Windows\SysWOW64\sswsfeuq\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:2824
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" create sswsfeuq binPath= "C:\Windows\SysWOW64\sswsfeuq\jmfnlnvf.exe /d\"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_8e153af80a5bda2c33eac3b4dfba3fe2bffd0b7e5c2f8420e4a0c2472a68a861.exe\"" type= own start= auto DisplayName= "wifi support"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:4496
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" description sswsfeuq "wifi internet conection"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:840
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" start sswsfeuq
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:3176
    • 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
      • Event Triggered Execution: Netsh Helper DLL
      • System Location Discovery: System Language Discovery
      PID:264
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 1216 -s 1036
      2⤵
      • Program crash
      PID:848
  • C:\Windows\SysWOW64\sswsfeuq\jmfnlnvf.exe
    C:\Windows\SysWOW64\sswsfeuq\jmfnlnvf.exe /d"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_8e153af80a5bda2c33eac3b4dfba3fe2bffd0b7e5c2f8420e4a0c2472a68a861.exe"
    1⤵
    • Executes dropped EXE
    • Suspicious use of SetThreadContext
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:3780
    • C:\Windows\SysWOW64\svchost.exe
      svchost.exe
      2⤵
      • Sets service image path in registry
      • Deletes itself
      • System Location Discovery: System Language Discovery
      PID:2044
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 3780 -s 532
      2⤵
      • Program crash
      PID:3964
  • C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -pss -s 444 -p 1216 -ip 1216
    1⤵
      PID:4552
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -pss -s 448 -p 3780 -ip 3780
      1⤵
        PID:636

      Network

      MITRE ATT&CK Enterprise v15

      Replay Monitor

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      Downloads

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

        Filesize

        11.6MB

        MD5

        bf4ac7be39de2776b5501e65fd3e0dbc

        SHA1

        097c23bd5e07180af5c0ef2afc9dcd73d62ebb56

        SHA256

        3b4004ba61882423f320f85edd881a6a44da25f65dab3419f29ca2eaa3f5e9d1

        SHA512

        9eea44676e3bff504dfdc46dc9ecb101729de12830e6e0ff764211c7f58e6483568ed254b4a8316604784547088bcb4a208ca834ed4a6ce849d1992e5c4da4ec

      • memory/1216-8-0x0000000000400000-0x000000000044C000-memory.dmp

        Filesize

        304KB

      • memory/1216-3-0x0000000000400000-0x0000000000415000-memory.dmp

        Filesize

        84KB

      • memory/1216-2-0x00000000001C0000-0x00000000001D3000-memory.dmp

        Filesize

        76KB

      • memory/1216-10-0x0000000000400000-0x0000000000415000-memory.dmp

        Filesize

        84KB

      • memory/1216-9-0x00000000001C0000-0x00000000001D3000-memory.dmp

        Filesize

        76KB

      • memory/1216-1-0x00000000007B0000-0x00000000008B0000-memory.dmp

        Filesize

        1024KB

      • memory/2044-13-0x0000000000980000-0x0000000000995000-memory.dmp

        Filesize

        84KB

      • memory/2044-15-0x0000000000980000-0x0000000000995000-memory.dmp

        Filesize

        84KB

      • memory/2044-16-0x0000000000980000-0x0000000000995000-memory.dmp

        Filesize

        84KB

      • memory/3780-11-0x0000000000400000-0x000000000044C000-memory.dmp

        Filesize

        304KB

      • memory/3780-12-0x0000000000400000-0x000000000044C000-memory.dmp

        Filesize

        304KB

      • memory/3780-18-0x0000000000400000-0x000000000044C000-memory.dmp

        Filesize

        304KB