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Analysis

  • max time kernel
    150s
  • max time network
    132s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20241007-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
  • submitted
    13/01/2025, 19:47

General

  • Target

    2025-01-13_bb831c7f52de206d92781189a192b098_mafia.exe

  • Size

    11.2MB

  • MD5

    bb831c7f52de206d92781189a192b098

  • SHA1

    024df9bd47f11c0159fb01fa01f7c92552734462

  • SHA256

    c9ddeb670cecb378ac5539460db36b23b32f8f4c416d55372bf3acf10badfde2

  • SHA512

    1962522edcabfd2c0595de017e131d2a6da3ee9fe238dc70636a614a56388255bede9377fef05447789411df14282d4fe9ffd4d5223dabd3928fa1ebbf2e31a0

  • SSDEEP

    24576:l6WdLQkyQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQv:kWdLQk

Malware Config

Extracted

Family

tofsee

C2

43.231.4.7

lazystax.ru

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\2025-01-13_bb831c7f52de206d92781189a192b098_mafia.exe
    "C:\Users\Admin\AppData\Local\Temp\2025-01-13_bb831c7f52de206d92781189a192b098_mafia.exe"
    1⤵
    • Checks computer location settings
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2228
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\zxcyoeeu\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:4828
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\fzzqbkbd.exe" C:\Windows\SysWOW64\zxcyoeeu\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:1324
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" create zxcyoeeu binPath= "C:\Windows\SysWOW64\zxcyoeeu\fzzqbkbd.exe /d\"C:\Users\Admin\AppData\Local\Temp\2025-01-13_bb831c7f52de206d92781189a192b098_mafia.exe\"" type= own start= auto DisplayName= "wifi support"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:4368
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" description zxcyoeeu "wifi internet conection"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:3500
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" start zxcyoeeu
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:3228
    • 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:3604
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 2228 -s 1036
      2⤵
      • Program crash
      PID:3580
  • C:\Windows\SysWOW64\zxcyoeeu\fzzqbkbd.exe
    C:\Windows\SysWOW64\zxcyoeeu\fzzqbkbd.exe /d"C:\Users\Admin\AppData\Local\Temp\2025-01-13_bb831c7f52de206d92781189a192b098_mafia.exe"
    1⤵
    • Executes dropped EXE
    • Suspicious use of SetThreadContext
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2408
    • C:\Windows\SysWOW64\svchost.exe
      svchost.exe
      2⤵
      • Sets service image path in registry
      • Deletes itself
      • System Location Discovery: System Language Discovery
      PID:2520
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 2408 -s 512
      2⤵
      • Program crash
      PID:3348
  • C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -pss -s 196 -p 2228 -ip 2228
    1⤵
      PID:2000
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -pss -s 528 -p 2408 -ip 2408
      1⤵
        PID:3252

      Network

      MITRE ATT&CK Enterprise v15

      Replay Monitor

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      Downloads

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

        Filesize

        10.4MB

        MD5

        91447b118b06fbd485a1dae6cc19a084

        SHA1

        160ff8209dfec692657ef114f1d7e8e0f7a34332

        SHA256

        2db97290051a7380672f5827fbcf0c2af76ce0cd90898308f4e6e20332d4dc37

        SHA512

        7eaa8ea30d932a606deae43288c223fe2cae33a81285912cc7d6b75b869d0a8ace5d051fbf542623cc8f75f8f24320b1bb5983232f36515d422ab9f9883a595f

      • memory/2228-7-0x0000000000400000-0x000000000044F000-memory.dmp

        Filesize

        316KB

      • memory/2228-3-0x0000000000400000-0x0000000000415000-memory.dmp

        Filesize

        84KB

      • memory/2228-2-0x00000000005A0000-0x00000000005B3000-memory.dmp

        Filesize

        76KB

      • memory/2228-8-0x00000000005A0000-0x00000000005B3000-memory.dmp

        Filesize

        76KB

      • memory/2228-9-0x0000000000400000-0x0000000000415000-memory.dmp

        Filesize

        84KB

      • memory/2228-1-0x0000000000450000-0x0000000000550000-memory.dmp

        Filesize

        1024KB

      • memory/2408-11-0x0000000000400000-0x000000000044F000-memory.dmp

        Filesize

        316KB

      • memory/2408-12-0x0000000000400000-0x000000000044F000-memory.dmp

        Filesize

        316KB

      • memory/2408-13-0x0000000000400000-0x000000000044F000-memory.dmp

        Filesize

        316KB

      • memory/2408-18-0x0000000000400000-0x000000000044F000-memory.dmp

        Filesize

        316KB

      • memory/2520-14-0x0000000000420000-0x0000000000435000-memory.dmp

        Filesize

        84KB

      • memory/2520-16-0x0000000000420000-0x0000000000435000-memory.dmp

        Filesize

        84KB

      • memory/2520-17-0x0000000000420000-0x0000000000435000-memory.dmp

        Filesize

        84KB