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Analysis

  • max time kernel
    148s
  • max time network
    153s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20241007-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
  • submitted
    25/12/2024, 18:21

General

  • Target

    JaffaCakes118_876c483b6fbc54f63b315535e70f50c2f5cd37ca2331847ba4a8bc7035435662.exe

  • Size

    284KB

  • MD5

    980a1da409587438ce6ad9402f8ef025

  • SHA1

    dc49bfc6d436dbd0a21fe23ff95280811f273c59

  • SHA256

    876c483b6fbc54f63b315535e70f50c2f5cd37ca2331847ba4a8bc7035435662

  • SHA512

    66391d577a8ba158ffa528d220ea51b6aa626c1c0d9716f4cd90739e7ed960a85594d3cb1419e49224e3f60508cbe3ebe06486df160302b82e3e86526313af14

  • SSDEEP

    6144:UF0i1M8mVdb98uiaMBl1wRnhu8UJfPJZSGp:UF0i1MtVdb4a+wRn6fPJZNp

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_876c483b6fbc54f63b315535e70f50c2f5cd37ca2331847ba4a8bc7035435662.exe
    "C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_876c483b6fbc54f63b315535e70f50c2f5cd37ca2331847ba4a8bc7035435662.exe"
    1⤵
    • Checks computer location settings
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:3948
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\ovmqvsvf\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:4976
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\ipboxklf.exe" C:\Windows\SysWOW64\ovmqvsvf\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:3648
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" create ovmqvsvf binPath= "C:\Windows\SysWOW64\ovmqvsvf\ipboxklf.exe /d\"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_876c483b6fbc54f63b315535e70f50c2f5cd37ca2331847ba4a8bc7035435662.exe\"" type= own start= auto DisplayName= "wifi support"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:4612
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" description ovmqvsvf "wifi internet conection"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:3036
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" start ovmqvsvf
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:1616
    • 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:3372
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 3948 -s 1028
      2⤵
      • Program crash
      PID:1060
  • C:\Windows\SysWOW64\ovmqvsvf\ipboxklf.exe
    C:\Windows\SysWOW64\ovmqvsvf\ipboxklf.exe /d"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_876c483b6fbc54f63b315535e70f50c2f5cd37ca2331847ba4a8bc7035435662.exe"
    1⤵
    • Executes dropped EXE
    • Suspicious use of SetThreadContext
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2176
    • C:\Windows\SysWOW64\svchost.exe
      svchost.exe
      2⤵
      • Sets service image path in registry
      • Deletes itself
      • System Location Discovery: System Language Discovery
      PID:544
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 2176 -s 516
      2⤵
      • Program crash
      PID:3600
  • C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -pss -s 456 -p 3948 -ip 3948
    1⤵
      PID:2132
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -pss -s 564 -p 2176 -ip 2176
      1⤵
        PID:5052

      Network

      MITRE ATT&CK Enterprise v15

      Replay Monitor

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      Downloads

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

        Filesize

        10.7MB

        MD5

        97851e75409e05812e9b414e763a8170

        SHA1

        3b91ac43c18389513b8f97860a28bd8ed862ddca

        SHA256

        c0458575c3667dfa29da41c3b3a2cb031152dcc6f7b294dc6292404a3e997c84

        SHA512

        8f15cc8f1c9fc029859127ac88eb0256c9433fcc353e7e058f6f67ff8a6f74508d6143a238aad06dcf9e2b0f70452d6f8bd8e1c692a5344c8617aa27a7a9de7d

      • memory/544-13-0x0000000000EA0000-0x0000000000EB5000-memory.dmp

        Filesize

        84KB

      • memory/544-11-0x0000000000EA0000-0x0000000000EB5000-memory.dmp

        Filesize

        84KB

      • memory/544-15-0x0000000000EA0000-0x0000000000EB5000-memory.dmp

        Filesize

        84KB

      • memory/2176-14-0x0000000000400000-0x0000000002B8F000-memory.dmp

        Filesize

        39.6MB

      • memory/3948-1-0x0000000002DA0000-0x0000000002EA0000-memory.dmp

        Filesize

        1024KB

      • memory/3948-2-0x00000000001C0000-0x00000000001D3000-memory.dmp

        Filesize

        76KB

      • memory/3948-3-0x0000000000400000-0x0000000000415000-memory.dmp

        Filesize

        84KB

      • memory/3948-9-0x00000000001C0000-0x00000000001D3000-memory.dmp

        Filesize

        76KB

      • memory/3948-10-0x0000000000400000-0x0000000000415000-memory.dmp

        Filesize

        84KB

      • memory/3948-8-0x0000000000400000-0x0000000002B8F000-memory.dmp

        Filesize

        39.6MB