Analysis

  • max time kernel
    147s
  • max time network
    155s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20231023-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20231023-enlocale:en-usos:windows10-2004-x64system
  • submitted
    06/11/2023, 01:43

General

  • Target

    Bujingle.exe

  • Size

    11.0MB

  • MD5

    1dded9eb42fa834637268fa6586a21c6

  • SHA1

    2024b5fe1c250b92a6feb26db404b795b6054f75

  • SHA256

    adc925a19dee5176ab2c8ee03519bc850ed45546508d63e0b166665c09aee712

  • SHA512

    8b0dfc03e136f934cffcd8d510e8c4066b994868220c18a0a3944051e07716105bf4fd604799f9936fd45e2f9b07ee52545d52d6207400fc40f409ad89aeb648

  • SSDEEP

    24576:LxukWDgRMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMM:LxukN

Malware Config

Extracted

Family

tofsee

C2

vanaheim.cn

jotunheim.name

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 1 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
  • Drops file in System32 directory 2 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
  • Modifies data under HKEY_USERS 7 IoCs
  • Suspicious use of WriteProcessMemory 23 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\Bujingle.exe
    "C:\Users\Admin\AppData\Local\Temp\Bujingle.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:768
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\rivlpdre\
      2⤵
        PID:1124
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\iyujewuc.exe" C:\Windows\SysWOW64\rivlpdre\
        2⤵
          PID:1960
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create rivlpdre binPath= "C:\Windows\SysWOW64\rivlpdre\iyujewuc.exe /d\"C:\Users\Admin\AppData\Local\Temp\Bujingle.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:4496
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description rivlpdre "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:1512
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start rivlpdre
          2⤵
          • Launches sc.exe
          PID:1116
        • 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:4444
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -u -p 768 -s 1040
          2⤵
          • Program crash
          PID:3960
      • C:\Windows\SysWOW64\rivlpdre\iyujewuc.exe
        C:\Windows\SysWOW64\rivlpdre\iyujewuc.exe /d"C:\Users\Admin\AppData\Local\Temp\Bujingle.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:2896
        • C:\Windows\SysWOW64\svchost.exe
          svchost.exe
          2⤵
          • Sets service image path in registry
          • Deletes itself
          • Drops file in System32 directory
          • Modifies data under HKEY_USERS
          PID:2980
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -u -p 2896 -s 536
          2⤵
          • Program crash
          PID:2204
      • C:\Windows\SysWOW64\WerFault.exe
        C:\Windows\SysWOW64\WerFault.exe -pss -s 460 -p 768 -ip 768
        1⤵
          PID:2060
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -pss -s 492 -p 2896 -ip 2896
          1⤵
            PID:2640

          Network

                MITRE ATT&CK Enterprise v15

                Replay Monitor

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                Downloads

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

                  Filesize

                  13.5MB

                  MD5

                  56091d808e797ecfc675d65ab4df2fdc

                  SHA1

                  7083de503cf1855ecb7b81217b053ff5d8fdfebb

                  SHA256

                  676354c3eb46cdc78cdb9d3700c294bbd375f870d496f529b1efffcd65f7a93e

                  SHA512

                  aabde35a835339df48f1fed8687b3b89d3597a405da121e027b7fd45f704253160b92d4fc39c128e2898c3488355319ed2671780c0ff743c6bd0aa819b24f8a6

                • C:\Windows\SysWOW64\rivlpdre\iyujewuc.exe

                  Filesize

                  13.5MB

                  MD5

                  56091d808e797ecfc675d65ab4df2fdc

                  SHA1

                  7083de503cf1855ecb7b81217b053ff5d8fdfebb

                  SHA256

                  676354c3eb46cdc78cdb9d3700c294bbd375f870d496f529b1efffcd65f7a93e

                  SHA512

                  aabde35a835339df48f1fed8687b3b89d3597a405da121e027b7fd45f704253160b92d4fc39c128e2898c3488355319ed2671780c0ff743c6bd0aa819b24f8a6

                • memory/768-2-0x0000000002430000-0x0000000002443000-memory.dmp

                  Filesize

                  76KB

                • memory/768-4-0x0000000000400000-0x0000000002282000-memory.dmp

                  Filesize

                  30.5MB

                • memory/768-6-0x0000000000400000-0x0000000002282000-memory.dmp

                  Filesize

                  30.5MB

                • memory/768-8-0x0000000000400000-0x0000000002282000-memory.dmp

                  Filesize

                  30.5MB

                • memory/768-9-0x0000000002430000-0x0000000002443000-memory.dmp

                  Filesize

                  76KB

                • memory/768-1-0x0000000002480000-0x0000000002580000-memory.dmp

                  Filesize

                  1024KB

                • memory/2896-16-0x0000000000400000-0x0000000002282000-memory.dmp

                  Filesize

                  30.5MB

                • memory/2896-11-0x00000000024A0000-0x00000000025A0000-memory.dmp

                  Filesize

                  1024KB

                • memory/2896-17-0x0000000000400000-0x0000000002282000-memory.dmp

                  Filesize

                  30.5MB

                • memory/2980-33-0x0000000002E10000-0x0000000002E20000-memory.dmp

                  Filesize

                  64KB

                • memory/2980-40-0x0000000002E10000-0x0000000002E20000-memory.dmp

                  Filesize

                  64KB

                • memory/2980-15-0x0000000000D30000-0x0000000000D45000-memory.dmp

                  Filesize

                  84KB

                • memory/2980-21-0x0000000000D30000-0x0000000000D45000-memory.dmp

                  Filesize

                  84KB

                • memory/2980-22-0x0000000002C00000-0x0000000002E0F000-memory.dmp

                  Filesize

                  2.1MB

                • memory/2980-25-0x0000000002C00000-0x0000000002E0F000-memory.dmp

                  Filesize

                  2.1MB

                • memory/2980-26-0x0000000000F60000-0x0000000000F66000-memory.dmp

                  Filesize

                  24KB

                • memory/2980-29-0x0000000002E10000-0x0000000002E20000-memory.dmp

                  Filesize

                  64KB

                • memory/2980-32-0x0000000002E10000-0x0000000002E20000-memory.dmp

                  Filesize

                  64KB

                • memory/2980-12-0x0000000000D30000-0x0000000000D45000-memory.dmp

                  Filesize

                  84KB

                • memory/2980-34-0x0000000002E10000-0x0000000002E20000-memory.dmp

                  Filesize

                  64KB

                • memory/2980-35-0x0000000002E10000-0x0000000002E20000-memory.dmp

                  Filesize

                  64KB

                • memory/2980-36-0x0000000002E10000-0x0000000002E20000-memory.dmp

                  Filesize

                  64KB

                • memory/2980-37-0x0000000002E10000-0x0000000002E20000-memory.dmp

                  Filesize

                  64KB

                • memory/2980-38-0x0000000002E10000-0x0000000002E20000-memory.dmp

                  Filesize

                  64KB

                • memory/2980-19-0x0000000000D30000-0x0000000000D45000-memory.dmp

                  Filesize

                  84KB

                • memory/2980-39-0x0000000002E10000-0x0000000002E20000-memory.dmp

                  Filesize

                  64KB

                • memory/2980-41-0x0000000002E10000-0x0000000002E20000-memory.dmp

                  Filesize

                  64KB

                • memory/2980-42-0x0000000002E10000-0x0000000002E20000-memory.dmp

                  Filesize

                  64KB

                • memory/2980-43-0x0000000002E10000-0x0000000002E20000-memory.dmp

                  Filesize

                  64KB

                • memory/2980-44-0x0000000002E10000-0x0000000002E20000-memory.dmp

                  Filesize

                  64KB

                • memory/2980-45-0x0000000002E10000-0x0000000002E20000-memory.dmp

                  Filesize

                  64KB

                • memory/2980-46-0x0000000002E10000-0x0000000002E20000-memory.dmp

                  Filesize

                  64KB

                • memory/2980-47-0x0000000002E10000-0x0000000002E20000-memory.dmp

                  Filesize

                  64KB

                • memory/2980-48-0x0000000002E10000-0x0000000002E20000-memory.dmp

                  Filesize

                  64KB

                • memory/2980-49-0x0000000002FE0000-0x0000000002FE5000-memory.dmp

                  Filesize

                  20KB

                • memory/2980-52-0x0000000002FE0000-0x0000000002FE5000-memory.dmp

                  Filesize

                  20KB

                • memory/2980-53-0x0000000007B00000-0x0000000007F0B000-memory.dmp

                  Filesize

                  4.0MB

                • memory/2980-56-0x0000000007B00000-0x0000000007F0B000-memory.dmp

                  Filesize

                  4.0MB

                • memory/2980-57-0x0000000002FF0000-0x0000000002FF7000-memory.dmp

                  Filesize

                  28KB