Analysis

  • max time kernel
    118s
  • max time network
    116s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20241007-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
  • submitted
    23-11-2024 05:53

General

  • Target

    8fcd431b3939e62180adfe1473fbd7bd18afd42145d85c2c7b9c68c0262dcd61.exe

  • Size

    13.9MB

  • MD5

    79dc2160ea73f5a008c5a7b25fb1f1ec

  • SHA1

    329fd850c1dd7541b67ff9b76d532645549a69e0

  • SHA256

    8fcd431b3939e62180adfe1473fbd7bd18afd42145d85c2c7b9c68c0262dcd61

  • SHA512

    02554429e5526535d1e82feb39b24f88a4bd068355a46efe3b335a57bd417276d4ae8d976a28bb26913c37d55ccb90898c0b115057d1e3924eb795b76db3bb6e

  • SSDEEP

    49152:2yzapZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZy:2CF

Malware Config

Extracted

Family

tofsee

C2

quadoil.ru

lakeflex.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\8fcd431b3939e62180adfe1473fbd7bd18afd42145d85c2c7b9c68c0262dcd61.exe
    "C:\Users\Admin\AppData\Local\Temp\8fcd431b3939e62180adfe1473fbd7bd18afd42145d85c2c7b9c68c0262dcd61.exe"
    1⤵
    • Checks computer location settings
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2276
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\bptbnero\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:3964
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\qjequju.exe" C:\Windows\SysWOW64\bptbnero\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:1376
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" create bptbnero binPath= "C:\Windows\SysWOW64\bptbnero\qjequju.exe /d\"C:\Users\Admin\AppData\Local\Temp\8fcd431b3939e62180adfe1473fbd7bd18afd42145d85c2c7b9c68c0262dcd61.exe\"" type= own start= auto DisplayName= "wifi support"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:5000
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" description bptbnero "wifi internet conection"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:2860
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" start bptbnero
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:4092
    • 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:2868
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 2276 -s 1032
      2⤵
      • Program crash
      PID:116
  • C:\Windows\SysWOW64\bptbnero\qjequju.exe
    C:\Windows\SysWOW64\bptbnero\qjequju.exe /d"C:\Users\Admin\AppData\Local\Temp\8fcd431b3939e62180adfe1473fbd7bd18afd42145d85c2c7b9c68c0262dcd61.exe"
    1⤵
    • Executes dropped EXE
    • Suspicious use of SetThreadContext
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:4112
    • C:\Windows\SysWOW64\svchost.exe
      svchost.exe
      2⤵
      • Sets service image path in registry
      • Deletes itself
      • System Location Discovery: System Language Discovery
      PID:2808
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 4112 -s 192
      2⤵
      • Program crash
      PID:2576
  • C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -pss -s 444 -p 2276 -ip 2276
    1⤵
      PID:2716
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -pss -s 420 -p 4112 -ip 4112
      1⤵
        PID:748

      Network

      MITRE ATT&CK Enterprise v15

      Replay Monitor

      Loading Replay Monitor...

      Downloads

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

        Filesize

        14.4MB

        MD5

        b45db47ca7eba531fa0f85f2963918c6

        SHA1

        722a4f25e0d349ae51d94d46c209c6c6fee4a6ad

        SHA256

        ac16f4e6c11ed47c7a456bc8cdf8e493e77058f0a8da05823fe5fb16873bb664

        SHA512

        efc0cf372f71c2a48aeb46116a436c09b5d73e79155c59ba3290ec84f9300b18498676d6d0a9d180cc2f55a0a23b42065b0545747bbaa4b6bd0421d81145af94

      • memory/2276-1-0x0000000001A00000-0x0000000001B00000-memory.dmp

        Filesize

        1024KB

      • memory/2276-2-0x0000000001970000-0x0000000001983000-memory.dmp

        Filesize

        76KB

      • memory/2276-3-0x0000000000400000-0x0000000000415000-memory.dmp

        Filesize

        84KB

      • memory/2276-10-0x0000000000400000-0x0000000000415000-memory.dmp

        Filesize

        84KB

      • memory/2276-8-0x0000000000400000-0x00000000016BD000-memory.dmp

        Filesize

        18.7MB

      • memory/2276-9-0x0000000001970000-0x0000000001983000-memory.dmp

        Filesize

        76KB

      • memory/2808-11-0x0000000000CE0000-0x0000000000CF5000-memory.dmp

        Filesize

        84KB

      • memory/2808-13-0x0000000000CE0000-0x0000000000CF5000-memory.dmp

        Filesize

        84KB

      • memory/2808-15-0x0000000000CE0000-0x0000000000CF5000-memory.dmp

        Filesize

        84KB

      • memory/4112-14-0x0000000000400000-0x00000000016BD000-memory.dmp

        Filesize

        18.7MB

      • memory/4112-16-0x0000000000400000-0x00000000016BD000-memory.dmp

        Filesize

        18.7MB