Analysis

  • max time kernel
    149s
  • max time network
    153s
  • 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 08:22

General

  • Target

    2668ea58977d5457c1bcb28d04d1b55692fc7d6a64bfc3413a2cede20e838cf4.exe

  • Size

    13.5MB

  • MD5

    feb515efe8237480211f2fabe3976bdf

  • SHA1

    d30c04512b4e2a34f1825b1fb8742be1d004cbc0

  • SHA256

    2668ea58977d5457c1bcb28d04d1b55692fc7d6a64bfc3413a2cede20e838cf4

  • SHA512

    a3eedc03386d4732ccd22bcaf04a4470bd711cbb3511390abe10394a4fbf5e1309adf549005816784a7e54ec1eb2f2bcdba1121bbe4bbd8460193fa3d70b9a8d

  • SSDEEP

    196608:r+TTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTn:r

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.

  • 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\2668ea58977d5457c1bcb28d04d1b55692fc7d6a64bfc3413a2cede20e838cf4.exe
    "C:\Users\Admin\AppData\Local\Temp\2668ea58977d5457c1bcb28d04d1b55692fc7d6a64bfc3413a2cede20e838cf4.exe"
    1⤵
    • Checks computer location settings
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:3260
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\lzitscnk\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:864
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\hwjfrqjv.exe" C:\Windows\SysWOW64\lzitscnk\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:1300
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" create lzitscnk binPath= "C:\Windows\SysWOW64\lzitscnk\hwjfrqjv.exe /d\"C:\Users\Admin\AppData\Local\Temp\2668ea58977d5457c1bcb28d04d1b55692fc7d6a64bfc3413a2cede20e838cf4.exe\"" type= own start= auto DisplayName= "wifi support"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:2628
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" description lzitscnk "wifi internet conection"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:1584
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" start lzitscnk
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:4964
    • 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:1672
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 3260 -s 808
      2⤵
      • Program crash
      PID:4000
  • C:\Windows\SysWOW64\lzitscnk\hwjfrqjv.exe
    C:\Windows\SysWOW64\lzitscnk\hwjfrqjv.exe /d"C:\Users\Admin\AppData\Local\Temp\2668ea58977d5457c1bcb28d04d1b55692fc7d6a64bfc3413a2cede20e838cf4.exe"
    1⤵
    • Executes dropped EXE
    • Suspicious use of SetThreadContext
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:3232
    • C:\Windows\SysWOW64\svchost.exe
      svchost.exe
      2⤵
      • Sets service image path in registry
      • Deletes itself
      • System Location Discovery: System Language Discovery
      PID:3940
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 3232 -s 516
      2⤵
      • Program crash
      PID:2148
  • C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -pss -s 440 -p 3260 -ip 3260
    1⤵
      PID:1248
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -pss -s 432 -p 3232 -ip 3232
      1⤵
        PID:3156

      Network

      MITRE ATT&CK Enterprise v15

      Replay Monitor

      Loading Replay Monitor...

      Downloads

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

        Filesize

        10.4MB

        MD5

        3880fc496d4a71698d5c90b92a503b1d

        SHA1

        bcc355c8fb6389087fc9d2f313d2271a1f5bbf29

        SHA256

        724e0d8678973d37b0b070f3159df8754a9efeb9db384e46ee38e498685ce867

        SHA512

        3380bd1379558fb42473ef87e9a1e0a92828953cdee106d300115f1a51e30ed3ba1bca99f86c02cdf15097c8deedaf07d17d9cd36e930de98f5c4be1015fc8bb

      • memory/3232-11-0x0000000000400000-0x0000000000870000-memory.dmp

        Filesize

        4.4MB

      • memory/3232-16-0x0000000000400000-0x0000000000870000-memory.dmp

        Filesize

        4.4MB

      • memory/3232-15-0x0000000000400000-0x0000000000870000-memory.dmp

        Filesize

        4.4MB

      • memory/3260-9-0x00000000001C0000-0x00000000001D3000-memory.dmp

        Filesize

        76KB

      • memory/3260-10-0x0000000000400000-0x0000000000415000-memory.dmp

        Filesize

        84KB

      • memory/3260-1-0x00000000008D0000-0x00000000009D0000-memory.dmp

        Filesize

        1024KB

      • memory/3260-8-0x0000000000400000-0x0000000000870000-memory.dmp

        Filesize

        4.4MB

      • memory/3260-3-0x0000000000400000-0x0000000000415000-memory.dmp

        Filesize

        84KB

      • memory/3260-2-0x00000000001C0000-0x00000000001D3000-memory.dmp

        Filesize

        76KB

      • memory/3940-14-0x00000000006C0000-0x00000000006D5000-memory.dmp

        Filesize

        84KB

      • memory/3940-12-0x00000000006C0000-0x00000000006D5000-memory.dmp

        Filesize

        84KB

      • memory/3940-17-0x00000000006C0000-0x00000000006D5000-memory.dmp

        Filesize

        84KB