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Analysis

  • max time kernel
    145s
  • max time network
    146s
  • platform
    windows7_x64
  • resource
    win7-20240708-en
  • resource tags

    arch:x64arch:x86image:win7-20240708-enlocale:en-usos:windows7-x64system
  • submitted
    31/08/2024, 13:09

General

  • Target

    072e795c44b87d1eb54005be791e75db47cb9717e43b300d3e27b6c9d99523fd.exe

  • Size

    13.6MB

  • MD5

    b5b559ae20ec80c26ec50afd2d077f53

  • SHA1

    4553fc5937302711ee5e74a881c7fd4acd119e5b

  • SHA256

    072e795c44b87d1eb54005be791e75db47cb9717e43b300d3e27b6c9d99523fd

  • SHA512

    dadb525483641f1574c5efcb48cc2c1333d34145b1b7e6386afa9f3e64db7ce45bbe4fc70f2656a997ec42e839bc73cb4c641bd97061e95d712c476f5573cdfd

  • SSDEEP

    196608:aI+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++2:a

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\072e795c44b87d1eb54005be791e75db47cb9717e43b300d3e27b6c9d99523fd.exe
    "C:\Users\Admin\AppData\Local\Temp\072e795c44b87d1eb54005be791e75db47cb9717e43b300d3e27b6c9d99523fd.exe"
    1⤵
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2372
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\iduyeemf\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:2692
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\bexfdfnx.exe" C:\Windows\SysWOW64\iduyeemf\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:1824
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" create iduyeemf binPath= "C:\Windows\SysWOW64\iduyeemf\bexfdfnx.exe /d\"C:\Users\Admin\AppData\Local\Temp\072e795c44b87d1eb54005be791e75db47cb9717e43b300d3e27b6c9d99523fd.exe\"" type= own start= auto DisplayName= "wifi support"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:2916
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" description iduyeemf "wifi internet conection"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:1156
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" start iduyeemf
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:2816
    • 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:2252
  • C:\Windows\SysWOW64\iduyeemf\bexfdfnx.exe
    C:\Windows\SysWOW64\iduyeemf\bexfdfnx.exe /d"C:\Users\Admin\AppData\Local\Temp\072e795c44b87d1eb54005be791e75db47cb9717e43b300d3e27b6c9d99523fd.exe"
    1⤵
    • Executes dropped EXE
    • Suspicious use of SetThreadContext
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2808
    • 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:2724

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    13.4MB

    MD5

    a9e0fba0a212c192b23eaba74a4aaca9

    SHA1

    ed41e0065750d177257e23614ad6e01263e833e3

    SHA256

    7235ad0a4c22ceeb1ba372d9803b2a3a686c7e6f317ae6a9c64c474a23fcdb23

    SHA512

    0f0f5c3906db222d76b39e69f9ed9553c4c9b87f21d72750e208ed582f934060f075a13589546492aef205e5dc17e8a56538bcea12993e7c5f1134e42552dcce

  • memory/2372-11-0x0000000000400000-0x0000000000415000-memory.dmp

    Filesize

    84KB

  • memory/2372-3-0x0000000000400000-0x0000000000415000-memory.dmp

    Filesize

    84KB

  • memory/2372-1-0x0000000000990000-0x0000000000A90000-memory.dmp

    Filesize

    1024KB

  • memory/2372-8-0x0000000000400000-0x0000000000870000-memory.dmp

    Filesize

    4.4MB

  • memory/2372-10-0x0000000000990000-0x0000000000A90000-memory.dmp

    Filesize

    1024KB

  • memory/2372-2-0x0000000000020000-0x0000000000033000-memory.dmp

    Filesize

    76KB

  • memory/2372-9-0x0000000000020000-0x0000000000033000-memory.dmp

    Filesize

    76KB

  • memory/2724-12-0x0000000000080000-0x0000000000095000-memory.dmp

    Filesize

    84KB

  • memory/2724-15-0x0000000000080000-0x0000000000095000-memory.dmp

    Filesize

    84KB

  • memory/2724-14-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

    Filesize

    4KB

  • memory/2724-18-0x0000000000080000-0x0000000000095000-memory.dmp

    Filesize

    84KB

  • memory/2724-19-0x0000000000080000-0x0000000000095000-memory.dmp

    Filesize

    84KB

  • memory/2808-16-0x0000000000400000-0x0000000000870000-memory.dmp

    Filesize

    4.4MB