Analysis

  • max time kernel
    145s
  • max time network
    145s
  • platform
    windows7_x64
  • resource
    win7-20240708-en
  • resource tags

    arch:x64arch:x86image:win7-20240708-enlocale:en-usos:windows7-x64system
  • submitted
    01-09-2024 04:20

General

  • Target

    d15dc4c9f5cc18798572b527797678adedd953ae755a9efadbeaf76353cc199f.exe

  • Size

    10.3MB

  • MD5

    7add49d3f94626db3bfd88652c55403b

  • SHA1

    c99c8680050272cade3963627fa87e697b4ee564

  • SHA256

    d15dc4c9f5cc18798572b527797678adedd953ae755a9efadbeaf76353cc199f

  • SHA512

    19edd3367327213abc11f3d696b46cdd4184a74e6653e43b0283aebcd0de135f43e92b69a1906328c318a5e7a3c06806665a015cbe70e5ee9e13e91e7654ca4f

  • SSDEEP

    196608:9I+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++G:9

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.

  • 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\d15dc4c9f5cc18798572b527797678adedd953ae755a9efadbeaf76353cc199f.exe
    "C:\Users\Admin\AppData\Local\Temp\d15dc4c9f5cc18798572b527797678adedd953ae755a9efadbeaf76353cc199f.exe"
    1⤵
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2688
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\chlnykou\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:1832
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\pnxvvluk.exe" C:\Windows\SysWOW64\chlnykou\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:2000
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" create chlnykou binPath= "C:\Windows\SysWOW64\chlnykou\pnxvvluk.exe /d\"C:\Users\Admin\AppData\Local\Temp\d15dc4c9f5cc18798572b527797678adedd953ae755a9efadbeaf76353cc199f.exe\"" type= own start= auto DisplayName= "wifi support"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:2928
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" description chlnykou "wifi internet conection"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:2452
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" start chlnykou
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:2812
    • 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:2764
  • C:\Windows\SysWOW64\chlnykou\pnxvvluk.exe
    C:\Windows\SysWOW64\chlnykou\pnxvvluk.exe /d"C:\Users\Admin\AppData\Local\Temp\d15dc4c9f5cc18798572b527797678adedd953ae755a9efadbeaf76353cc199f.exe"
    1⤵
    • Executes dropped EXE
    • Suspicious use of SetThreadContext
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2908
    • 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:3028

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    11.8MB

    MD5

    b9ec354f32ab40123fecaa6748ccdb5f

    SHA1

    483dcd7a4c1aa3b844d90dc5c3db56871d6e8ea8

    SHA256

    646d27461f1ae7073dd8898e96f12064e968897471d57c5f88a1467015f8102a

    SHA512

    69c0900d9193b8a22c1d170f05379e207df8b4d5eacb382c7836fd2342c0f8dc09ea39689dbfe4615ee1fa192a740e11aadd554f626e77b88ad4676e3bf5cd84

  • memory/2688-8-0x0000000000400000-0x0000000000870000-memory.dmp

    Filesize

    4.4MB

  • memory/2688-3-0x0000000000400000-0x0000000000415000-memory.dmp

    Filesize

    84KB

  • memory/2688-2-0x0000000000020000-0x0000000000033000-memory.dmp

    Filesize

    76KB

  • memory/2688-10-0x0000000000400000-0x0000000000415000-memory.dmp

    Filesize

    84KB

  • memory/2688-9-0x0000000000020000-0x0000000000033000-memory.dmp

    Filesize

    76KB

  • memory/2688-1-0x00000000009A0000-0x0000000000AA0000-memory.dmp

    Filesize

    1024KB

  • memory/2908-15-0x0000000000400000-0x0000000000870000-memory.dmp

    Filesize

    4.4MB

  • memory/3028-11-0x0000000000080000-0x0000000000095000-memory.dmp

    Filesize

    84KB

  • memory/3028-17-0x0000000000080000-0x0000000000095000-memory.dmp

    Filesize

    84KB

  • memory/3028-14-0x0000000000080000-0x0000000000095000-memory.dmp

    Filesize

    84KB

  • memory/3028-13-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

    Filesize

    4KB

  • memory/3028-18-0x0000000000080000-0x0000000000095000-memory.dmp

    Filesize

    84KB