Analysis

  • max time kernel
    145s
  • max time network
    145s
  • platform
    windows7_x64
  • resource
    win7-20240729-en
  • resource tags

    arch:x64arch:x86image:win7-20240729-enlocale:en-usos:windows7-x64system
  • submitted
    29-12-2024 06:43

General

  • Target

    JaffaCakes118_852b4503d236e4c9791449bc59dc3e81718c98ce87a9fa2253de95fd362cf033.exe

  • Size

    258KB

  • MD5

    3b7e3f26701a8d911c01b5dd20cbc88d

  • SHA1

    a151397e5e820e637b826cc70f5727a63972770b

  • SHA256

    852b4503d236e4c9791449bc59dc3e81718c98ce87a9fa2253de95fd362cf033

  • SHA512

    f1c0d25ce9a43e0d444712fed708cd0e919c59aa26398976f834a7b19d1257200b23399e20b3c9797234cccd6c2cd0251afa9f14e5a05c7784e8952b21d9e11b

  • SSDEEP

    6144:ZQFMZhT/1A4ToggvrHXgxH8+MKAuERtPQ7:ZAeh/1A4kgi3gdCKA9jI

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
  • 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
  • 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.

  • 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 30 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_852b4503d236e4c9791449bc59dc3e81718c98ce87a9fa2253de95fd362cf033.exe
    "C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_852b4503d236e4c9791449bc59dc3e81718c98ce87a9fa2253de95fd362cf033.exe"
    1⤵
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2488
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\szkexqdg\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:2248
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\yfrenabv.exe" C:\Windows\SysWOW64\szkexqdg\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:1168
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" create szkexqdg binPath= "C:\Windows\SysWOW64\szkexqdg\yfrenabv.exe /d\"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_852b4503d236e4c9791449bc59dc3e81718c98ce87a9fa2253de95fd362cf033.exe\"" type= own start= auto DisplayName= "wifi support"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:2196
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" description szkexqdg "wifi internet conection"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:2748
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" start szkexqdg
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:2808
    • 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:2396
  • C:\Windows\SysWOW64\szkexqdg\yfrenabv.exe
    C:\Windows\SysWOW64\szkexqdg\yfrenabv.exe /d"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_852b4503d236e4c9791449bc59dc3e81718c98ce87a9fa2253de95fd362cf033.exe"
    1⤵
    • Executes dropped EXE
    • Suspicious use of SetThreadContext
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2916
    • C:\Windows\SysWOW64\svchost.exe
      svchost.exe
      2⤵
      • Windows security bypass
      • Sets service image path in registry
      • Deletes itself
      • System Location Discovery: System Language Discovery
      PID:2984

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    11.8MB

    MD5

    017afe0b3be34fe6424c29b04e1c22b2

    SHA1

    65e43546a0bbf18a98d0037cc435d361086749c0

    SHA256

    0b5d01c20515caa14e810a05c9cbc642471e50b1f82229dcfc0be2489b279d70

    SHA512

    0237bd8c0ea5ffc5dd1c1d0a003ff9d98af2fe5eb4d9d8f59f0ec1c9bee54c9728ed45ae6ecd8b89aea4a250262c539c98cb2adf2b67991d9bca78ee265ce58d

  • memory/2488-9-0x0000000000020000-0x0000000000033000-memory.dmp

    Filesize

    76KB

  • memory/2488-3-0x0000000000400000-0x0000000000415000-memory.dmp

    Filesize

    84KB

  • memory/2488-2-0x0000000000020000-0x0000000000033000-memory.dmp

    Filesize

    76KB

  • memory/2488-8-0x0000000000400000-0x0000000000870000-memory.dmp

    Filesize

    4.4MB

  • memory/2488-10-0x0000000000400000-0x0000000000415000-memory.dmp

    Filesize

    84KB

  • memory/2488-1-0x0000000000960000-0x0000000000A60000-memory.dmp

    Filesize

    1024KB

  • memory/2916-17-0x0000000000400000-0x0000000000870000-memory.dmp

    Filesize

    4.4MB

  • memory/2984-13-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

    Filesize

    4KB

  • memory/2984-14-0x00000000000C0000-0x00000000000D5000-memory.dmp

    Filesize

    84KB

  • memory/2984-11-0x00000000000C0000-0x00000000000D5000-memory.dmp

    Filesize

    84KB

  • memory/2984-16-0x00000000000C0000-0x00000000000D5000-memory.dmp

    Filesize

    84KB

  • memory/2984-18-0x00000000000C0000-0x00000000000D5000-memory.dmp

    Filesize

    84KB