Analysis

  • max time kernel
    142s
  • max time network
    151s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240226-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
  • submitted
    26/03/2024, 16:31

General

  • Target

    df9b061b8b91e89659ad8592ce4ea7ad.exe

  • Size

    10.6MB

  • MD5

    df9b061b8b91e89659ad8592ce4ea7ad

  • SHA1

    182c7d734f20a4145fff57048f1b0b443d02d5bc

  • SHA256

    be0186fe58064c8c88db16927a48a857699ba9ea162d49192dc2b152637d8aa4

  • SHA512

    7152b581cb9bdaf6af797d27f4e8a23a7403e77bd4aced1a98424d9f9a585ad7d615ed44285b2085e75255c5c7aa288c931564f5442145fd695b7787e9674a51

  • SSDEEP

    49152:URBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBB5:

Malware Config

Extracted

Family

tofsee

C2

43.231.4.6

lazystax.ru

Signatures

  • Tofsee

    Backdoor/botnet which carries out malicious activities based on commands from a C2 server.

  • Creates new service(s) 1 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).

  • Program crash 2 IoCs
  • Suspicious use of WriteProcessMemory 23 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\df9b061b8b91e89659ad8592ce4ea7ad.exe
    "C:\Users\Admin\AppData\Local\Temp\df9b061b8b91e89659ad8592ce4ea7ad.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:3040
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\jhfirlgh\
      2⤵
        PID:748
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\hdvtbknf.exe" C:\Windows\SysWOW64\jhfirlgh\
        2⤵
          PID:3080
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create jhfirlgh binPath= "C:\Windows\SysWOW64\jhfirlgh\hdvtbknf.exe /d\"C:\Users\Admin\AppData\Local\Temp\df9b061b8b91e89659ad8592ce4ea7ad.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:1020
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description jhfirlgh "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:2052
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start jhfirlgh
          2⤵
          • Launches sc.exe
          PID:4860
        • 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
          PID:4788
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -u -p 3040 -s 604
          2⤵
          • Program crash
          PID:3260
      • C:\Windows\SysWOW64\jhfirlgh\hdvtbknf.exe
        C:\Windows\SysWOW64\jhfirlgh\hdvtbknf.exe /d"C:\Users\Admin\AppData\Local\Temp\df9b061b8b91e89659ad8592ce4ea7ad.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:1336
        • C:\Windows\SysWOW64\svchost.exe
          svchost.exe
          2⤵
          • Sets service image path in registry
          • Deletes itself
          PID:4528
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -u -p 1336 -s 512
          2⤵
          • Program crash
          PID:4320
      • C:\Windows\SysWOW64\WerFault.exe
        C:\Windows\SysWOW64\WerFault.exe -pss -s 452 -p 3040 -ip 3040
        1⤵
          PID:3716
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -pss -s 468 -p 1336 -ip 1336
          1⤵
            PID:3188

          Network

          MITRE ATT&CK Enterprise v15

          Replay Monitor

          Loading Replay Monitor...

          Downloads

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

            Filesize

            14.5MB

            MD5

            02bed7835e90c3f7446a49d62650e3ae

            SHA1

            1949efb09cc938e95ec82b668769f939e7f09aef

            SHA256

            adc967e2f862fa26fbdc1d1803cfceaa249de022d6b1bb67605132b9139bca2d

            SHA512

            e1510250fc0dc46e1f1b137e8cfa09f8ce0904007ed6fc200fb2f46961d917172c7877536f0dda77ba7ab039d36b3ad711487975154cc6d8a40cc1d1e23e9956

          • C:\Windows\SysWOW64\jhfirlgh\hdvtbknf.exe

            Filesize

            4.9MB

            MD5

            96e5261cb500d7872afd5a3f7371c5e6

            SHA1

            0659c14ac7773a8ac13333363930d847d052663c

            SHA256

            2b01001a58816c99e706b59729d3d4eaff4aabd472dab46b3d43b515b0bc7e33

            SHA512

            3823dc3196980b44191a3ee7bfc58c05c7b255545632a72d0d0b4055219cab7a4a120f8d45b8a1b3e1b664ea84fe8c33f8337a23c8a8fd6163584e2f74ea2e48

          • memory/1336-10-0x0000000000CD0000-0x0000000000DD0000-memory.dmp

            Filesize

            1024KB

          • memory/1336-18-0x0000000000400000-0x0000000000C0A000-memory.dmp

            Filesize

            8.0MB

          • memory/1336-11-0x0000000000400000-0x0000000000C0A000-memory.dmp

            Filesize

            8.0MB

          • memory/3040-7-0x0000000000400000-0x0000000000C0A000-memory.dmp

            Filesize

            8.0MB

          • memory/3040-1-0x0000000000C80000-0x0000000000D80000-memory.dmp

            Filesize

            1024KB

          • memory/3040-8-0x0000000000D90000-0x0000000000DA3000-memory.dmp

            Filesize

            76KB

          • memory/3040-4-0x0000000000400000-0x0000000000C0A000-memory.dmp

            Filesize

            8.0MB

          • memory/3040-2-0x0000000000D90000-0x0000000000DA3000-memory.dmp

            Filesize

            76KB

          • memory/4528-12-0x0000000001280000-0x0000000001295000-memory.dmp

            Filesize

            84KB

          • memory/4528-15-0x0000000001280000-0x0000000001295000-memory.dmp

            Filesize

            84KB

          • memory/4528-16-0x0000000001280000-0x0000000001295000-memory.dmp

            Filesize

            84KB

          • memory/4528-17-0x0000000001280000-0x0000000001295000-memory.dmp

            Filesize

            84KB

          • memory/4528-19-0x0000000001280000-0x0000000001295000-memory.dmp

            Filesize

            84KB