Analysis

  • max time kernel
    149s
  • max time network
    150s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240802-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
  • submitted
    28-08-2024 21:55

General

  • Target

    c7b736a9fca49450b679452260c86084_JaffaCakes118.exe

  • Size

    12.9MB

  • MD5

    c7b736a9fca49450b679452260c86084

  • SHA1

    65831ef95101644640229fd4872a69b738db4b19

  • SHA256

    ecb8395da2818b288bae02ac7827548df335aeefed102d6a9bda6d3738108c56

  • SHA512

    e987647067046fb2d4a3501c1ef4ddcc0d3533f1def8f38b52168cb4d431961cb131abd69a992fca0cb6998daf5ace33a7e279c93173617a79119f090d063e9a

  • SSDEEP

    196608:vJ2MMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMH:v

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.

  • 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\c7b736a9fca49450b679452260c86084_JaffaCakes118.exe
    "C:\Users\Admin\AppData\Local\Temp\c7b736a9fca49450b679452260c86084_JaffaCakes118.exe"
    1⤵
    • Checks computer location settings
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:1112
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\wosfdncn\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:920
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\bzoauqbr.exe" C:\Windows\SysWOW64\wosfdncn\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:4060
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" create wosfdncn binPath= "C:\Windows\SysWOW64\wosfdncn\bzoauqbr.exe /d\"C:\Users\Admin\AppData\Local\Temp\c7b736a9fca49450b679452260c86084_JaffaCakes118.exe\"" type= own start= auto DisplayName= "wifi support"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:100
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" description wosfdncn "wifi internet conection"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:1648
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" start wosfdncn
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:3872
    • 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:4604
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 1112 -s 796
      2⤵
      • Program crash
      PID:2952
  • C:\Windows\SysWOW64\wosfdncn\bzoauqbr.exe
    C:\Windows\SysWOW64\wosfdncn\bzoauqbr.exe /d"C:\Users\Admin\AppData\Local\Temp\c7b736a9fca49450b679452260c86084_JaffaCakes118.exe"
    1⤵
    • Executes dropped EXE
    • Suspicious use of SetThreadContext
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:3892
    • C:\Windows\SysWOW64\svchost.exe
      svchost.exe
      2⤵
      • Sets service image path in registry
      • Deletes itself
      • System Location Discovery: System Language Discovery
      PID:4704
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 3892 -s 520
      2⤵
      • Program crash
      PID:1932
  • C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -pss -s 444 -p 1112 -ip 1112
    1⤵
      PID:1560
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -pss -s 420 -p 3892 -ip 3892
      1⤵
        PID:1148

      Network

      MITRE ATT&CK Enterprise v15

      Replay Monitor

      Loading Replay Monitor...

      Downloads

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

        Filesize

        11.8MB

        MD5

        fb4ff4123abafa9fb970a28fa4cfb6bb

        SHA1

        ed75d5e249f498c441069800e5c3aa50ba2c2117

        SHA256

        5dd9e12ff633e412e045c9f6c894451397d440c09763a45535cf0d133619f401

        SHA512

        c1741ea45945288df9107bfe5c2c18df782b42a7740f326fd5d8c9415011c77f37ea93e34a88773d5f26c02a60f6e58d2a750b3d78c4eb44ce7f16553536d429

      • memory/1112-9-0x00000000001E0000-0x00000000001F3000-memory.dmp

        Filesize

        76KB

      • memory/1112-3-0x0000000000400000-0x0000000000415000-memory.dmp

        Filesize

        84KB

      • memory/1112-2-0x00000000001E0000-0x00000000001F3000-memory.dmp

        Filesize

        76KB

      • memory/1112-8-0x0000000000400000-0x0000000000871000-memory.dmp

        Filesize

        4.4MB

      • memory/1112-10-0x0000000000400000-0x0000000000415000-memory.dmp

        Filesize

        84KB

      • memory/1112-1-0x00000000009B0000-0x0000000000AB0000-memory.dmp

        Filesize

        1024KB

      • memory/3892-11-0x0000000000400000-0x0000000000871000-memory.dmp

        Filesize

        4.4MB

      • memory/3892-15-0x0000000000400000-0x0000000000871000-memory.dmp

        Filesize

        4.4MB

      • memory/3892-16-0x0000000000400000-0x0000000000871000-memory.dmp

        Filesize

        4.4MB

      • memory/4704-12-0x00000000008F0000-0x0000000000905000-memory.dmp

        Filesize

        84KB

      • memory/4704-14-0x00000000008F0000-0x0000000000905000-memory.dmp

        Filesize

        84KB

      • memory/4704-17-0x00000000008F0000-0x0000000000905000-memory.dmp

        Filesize

        84KB