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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
    05/01/2025, 07:00

General

  • Target

    JaffaCakes118_92f27854fc1c33255253c9d0fedf7a8b.exe

  • Size

    302KB

  • MD5

    92f27854fc1c33255253c9d0fedf7a8b

  • SHA1

    6888e1954ebe90a884250d182c7bd166f4e98ca0

  • SHA256

    2d6a0c56a8747c82868605e8d25db845911a79d28cb4b77196a0026ac6d95427

  • SHA512

    429671f2875f1de2bd940d6fc8aa46c958086f05c32e74f530521068f40ee6dd9b86909ad099fb3a0c9e1893a48f9a24e65a0d4ad7f57e02501b8fd7484c04c9

  • SSDEEP

    6144:UuGJxsl1+JHGaZVApoeZWK8pzMxhrgtu:40yGaZVaoe18pzigt

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_92f27854fc1c33255253c9d0fedf7a8b.exe
    "C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_92f27854fc1c33255253c9d0fedf7a8b.exe"
    1⤵
    • Checks computer location settings
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2184
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\pieikbzj\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:2836
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\dxtzkums.exe" C:\Windows\SysWOW64\pieikbzj\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:580
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" create pieikbzj binPath= "C:\Windows\SysWOW64\pieikbzj\dxtzkums.exe /d\"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_92f27854fc1c33255253c9d0fedf7a8b.exe\"" type= own start= auto DisplayName= "wifi support"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:1412
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" description pieikbzj "wifi internet conection"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:3108
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" start pieikbzj
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:2980
    • 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:2308
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 2184 -s 1040
      2⤵
      • Program crash
      PID:5104
  • C:\Windows\SysWOW64\pieikbzj\dxtzkums.exe
    C:\Windows\SysWOW64\pieikbzj\dxtzkums.exe /d"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_92f27854fc1c33255253c9d0fedf7a8b.exe"
    1⤵
    • Executes dropped EXE
    • Suspicious use of SetThreadContext
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:4516
    • C:\Windows\SysWOW64\svchost.exe
      svchost.exe
      2⤵
      • Sets service image path in registry
      • Deletes itself
      • System Location Discovery: System Language Discovery
      PID:1012
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 4516 -s 516
      2⤵
      • Program crash
      PID:4212
  • C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -pss -s 444 -p 2184 -ip 2184
    1⤵
      PID:2296
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -pss -s 448 -p 4516 -ip 4516
      1⤵
        PID:4368

      Network

      MITRE ATT&CK Enterprise v15

      Replay Monitor

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      Downloads

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

        Filesize

        12.3MB

        MD5

        a8c559bdb2eaf4fd2791d954701a63f4

        SHA1

        ecf9de75dd97e28b2bb0eab0b85c926b6236c263

        SHA256

        197d6e70de5feae10ae59e89a2b9dbbf3b8cc2502d995ffbbb4169faecd15274

        SHA512

        87d385097c38ab5cf9e6ca00828d124742cf5203f9e4cf1c521683269b2ae8de7593fe3c9873003ff8c7a57f83ef4bc4c367361c1e5c176e48859f16e0dae170

      • memory/1012-11-0x00000000010E0000-0x00000000010F5000-memory.dmp

        Filesize

        84KB

      • memory/1012-13-0x00000000010E0000-0x00000000010F5000-memory.dmp

        Filesize

        84KB

      • memory/1012-14-0x00000000010E0000-0x00000000010F5000-memory.dmp

        Filesize

        84KB

      • memory/2184-1-0x0000000002F20000-0x0000000003020000-memory.dmp

        Filesize

        1024KB

      • memory/2184-2-0x0000000004B00000-0x0000000004B13000-memory.dmp

        Filesize

        76KB

      • memory/2184-3-0x0000000000400000-0x0000000000415000-memory.dmp

        Filesize

        84KB

      • memory/2184-10-0x0000000000400000-0x0000000000415000-memory.dmp

        Filesize

        84KB

      • memory/2184-9-0x0000000004B00000-0x0000000004B13000-memory.dmp

        Filesize

        76KB

      • memory/2184-8-0x0000000000400000-0x0000000002DA3000-memory.dmp

        Filesize

        41.6MB

      • memory/4516-15-0x0000000000400000-0x0000000002DA3000-memory.dmp

        Filesize

        41.6MB