Analysis

  • max time kernel
    147s
  • max time network
    151s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240802-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
  • submitted
    31-08-2024 01:22

General

  • Target

    94999d1dacca1ec7527f3aca2dc6d6650d71f32a10d141bda8e86d1680372d32.exe

  • Size

    10.9MB

  • MD5

    5b71eafbe78dfb0cfe34d51e78f4b646

  • SHA1

    4704183ac76b4dfcf6cb8f7f17ec383846ac0b5b

  • SHA256

    94999d1dacca1ec7527f3aca2dc6d6650d71f32a10d141bda8e86d1680372d32

  • SHA512

    c676de991a00ea0c3279bc1a6cdd7a22f84f1ebdd94106b6eac535f1669faf268f291a77c05d814bc7555038f168c379c7c38b872b790b144b779dc643fdaf97

  • SSDEEP

    98304:/C+PPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPn:6

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.

  • 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\94999d1dacca1ec7527f3aca2dc6d6650d71f32a10d141bda8e86d1680372d32.exe
    "C:\Users\Admin\AppData\Local\Temp\94999d1dacca1ec7527f3aca2dc6d6650d71f32a10d141bda8e86d1680372d32.exe"
    1⤵
    • Checks computer location settings
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:1368
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\wunqysqo\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:1840
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\bzoauqbr.exe" C:\Windows\SysWOW64\wunqysqo\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:4896
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" create wunqysqo binPath= "C:\Windows\SysWOW64\wunqysqo\bzoauqbr.exe /d\"C:\Users\Admin\AppData\Local\Temp\94999d1dacca1ec7527f3aca2dc6d6650d71f32a10d141bda8e86d1680372d32.exe\"" type= own start= auto DisplayName= "wifi support"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:4324
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" description wunqysqo "wifi internet conection"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:2408
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" start wunqysqo
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:1612
    • 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:2264
  • C:\Windows\SysWOW64\wunqysqo\bzoauqbr.exe
    C:\Windows\SysWOW64\wunqysqo\bzoauqbr.exe /d"C:\Users\Admin\AppData\Local\Temp\94999d1dacca1ec7527f3aca2dc6d6650d71f32a10d141bda8e86d1680372d32.exe"
    1⤵
    • Executes dropped EXE
    • Suspicious use of SetThreadContext
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2828
    • C:\Windows\SysWOW64\svchost.exe
      svchost.exe
      2⤵
      • Sets service image path in registry
      • Deletes itself
      • System Location Discovery: System Language Discovery
      PID:4272

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    14.1MB

    MD5

    be648923f294c910011362bb59cba20a

    SHA1

    816646580505a62b7c7fc76e4f47683b72c93ca1

    SHA256

    c444f650fef3dff8c29eed564e23d949a0af782fcc3d7ebfa3b893215e1ff1a1

    SHA512

    418031933299331393698d17382d71018864532b019cac7199f7690a96fb67182d246ebcf3a291601c714f1306d257071483dbf745403a823ba1d74eb1549830

  • memory/1368-8-0x0000000000400000-0x00000000004AD000-memory.dmp

    Filesize

    692KB

  • memory/1368-3-0x0000000000400000-0x0000000000415000-memory.dmp

    Filesize

    84KB

  • memory/1368-2-0x0000000000720000-0x0000000000733000-memory.dmp

    Filesize

    76KB

  • memory/1368-10-0x0000000000400000-0x0000000000415000-memory.dmp

    Filesize

    84KB

  • memory/1368-9-0x0000000000720000-0x0000000000733000-memory.dmp

    Filesize

    76KB

  • memory/1368-1-0x0000000000800000-0x0000000000900000-memory.dmp

    Filesize

    1024KB

  • memory/2828-13-0x0000000000400000-0x00000000004AD000-memory.dmp

    Filesize

    692KB

  • memory/2828-12-0x0000000000400000-0x00000000004AD000-memory.dmp

    Filesize

    692KB

  • memory/2828-11-0x0000000000400000-0x00000000004AD000-memory.dmp

    Filesize

    692KB

  • memory/2828-18-0x0000000000400000-0x00000000004AD000-memory.dmp

    Filesize

    692KB

  • memory/4272-14-0x0000000000BC0000-0x0000000000BD5000-memory.dmp

    Filesize

    84KB

  • memory/4272-16-0x0000000000BC0000-0x0000000000BD5000-memory.dmp

    Filesize

    84KB

  • memory/4272-19-0x0000000000BC0000-0x0000000000BD5000-memory.dmp

    Filesize

    84KB