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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
    03/09/2024, 23:50

General

  • Target

    29cef4e0835033264d7f7586a28c3da722242e9c6ff709e61a6a58e2069e2b09.exe

  • Size

    423KB

  • MD5

    784de694eb6b797aada95c4b52092889

  • SHA1

    3d80cfb816ef8605e25662306c0b4300d154afe6

  • SHA256

    29cef4e0835033264d7f7586a28c3da722242e9c6ff709e61a6a58e2069e2b09

  • SHA512

    aa3fd40f2e7d58caff7b28580558099ff3b6c43ffdf4758060c6468db9e2636dc0f84367d511f2d11787ee3fd50b86ecc093d285bba090b90403d95b6d70ca3a

  • SSDEEP

    6144:C5ZXcDLKsQlfxg4QPM9ZQAuI4TCrMTU6bGSKwtX:CnXcDLDQusZX34lrlt

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) 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
  • 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).

  • 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.

  • Modifies data under HKEY_USERS 6 IoCs
  • Suspicious use of WriteProcessMemory 23 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\29cef4e0835033264d7f7586a28c3da722242e9c6ff709e61a6a58e2069e2b09.exe
    "C:\Users\Admin\AppData\Local\Temp\29cef4e0835033264d7f7586a28c3da722242e9c6ff709e61a6a58e2069e2b09.exe"
    1⤵
    • Checks computer location settings
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:3636
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\svnixya\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:3952
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\xateenoo.exe" C:\Windows\SysWOW64\svnixya\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:3132
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" create svnixya binPath= "C:\Windows\SysWOW64\svnixya\xateenoo.exe /d\"C:\Users\Admin\AppData\Local\Temp\29cef4e0835033264d7f7586a28c3da722242e9c6ff709e61a6a58e2069e2b09.exe\"" type= own start= auto DisplayName= "wifi support"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:3308
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" description svnixya "wifi internet conection"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:1164
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" start svnixya
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:1928
    • 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:1568
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 3636 -s 1336
      2⤵
      • Program crash
      PID:2344
  • C:\Windows\SysWOW64\svnixya\xateenoo.exe
    C:\Windows\SysWOW64\svnixya\xateenoo.exe /d"C:\Users\Admin\AppData\Local\Temp\29cef4e0835033264d7f7586a28c3da722242e9c6ff709e61a6a58e2069e2b09.exe"
    1⤵
    • Executes dropped EXE
    • Suspicious use of SetThreadContext
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:1340
    • C:\Windows\SysWOW64\svchost.exe
      svchost.exe
      2⤵
      • Sets service image path in registry
      • Deletes itself
      • Drops file in System32 directory
      • System Location Discovery: System Language Discovery
      • Modifies data under HKEY_USERS
      PID:3144
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 1340 -s 512
      2⤵
      • Program crash
      PID:2984
  • C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -pss -s 460 -p 3636 -ip 3636
    1⤵
      PID:1552
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -pss -s 432 -p 1340 -ip 1340
      1⤵
        PID:548

      Network

      MITRE ATT&CK Enterprise v15

      Replay Monitor

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      Downloads

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

        Filesize

        11.2MB

        MD5

        8884e0633f0d7bd43ad8a4271e32a082

        SHA1

        1e7b7b1cf705777ac0412d207b678d1536f065cd

        SHA256

        cf02f87b80c6dd6197423b9fa3b30c76733a807ba9e73e90e1ca8aaf9bda0bfc

        SHA512

        b4dae6f57534a71d2c353fb3d727b79bda42e5519e7918bf918a00997694d39ebbe706dfe766a1c196ee3cc461066ea6c4c0dd0b1f12720e5d30a938b41d38e4

      • memory/1340-11-0x0000000000400000-0x00000000005FE000-memory.dmp

        Filesize

        2.0MB

      • memory/1340-19-0x0000000000400000-0x00000000005FE000-memory.dmp

        Filesize

        2.0MB

      • memory/1340-12-0x0000000000400000-0x00000000005FE000-memory.dmp

        Filesize

        2.0MB

      • memory/1340-13-0x0000000000400000-0x00000000005FE000-memory.dmp

        Filesize

        2.0MB

      • memory/3144-46-0x00000000009F0000-0x0000000000A00000-memory.dmp

        Filesize

        64KB

      • memory/3144-44-0x00000000009F0000-0x0000000000A00000-memory.dmp

        Filesize

        64KB

      • memory/3144-24-0x0000000002400000-0x000000000260F000-memory.dmp

        Filesize

        2.1MB

      • memory/3144-22-0x0000000002400000-0x000000000260F000-memory.dmp

        Filesize

        2.1MB

      • memory/3144-25-0x00000000009D0000-0x00000000009D6000-memory.dmp

        Filesize

        24KB

      • memory/3144-14-0x00000000005C0000-0x00000000005D5000-memory.dmp

        Filesize

        84KB

      • memory/3144-16-0x00000000005C0000-0x00000000005D5000-memory.dmp

        Filesize

        84KB

      • memory/3144-17-0x00000000005C0000-0x00000000005D5000-memory.dmp

        Filesize

        84KB

      • memory/3144-28-0x00000000009F0000-0x0000000000A00000-memory.dmp

        Filesize

        64KB

      • memory/3144-56-0x0000000001BF0000-0x0000000001BF7000-memory.dmp

        Filesize

        28KB

      • memory/3144-55-0x0000000007400000-0x000000000780B000-memory.dmp

        Filesize

        4.0MB

      • memory/3144-52-0x0000000007400000-0x000000000780B000-memory.dmp

        Filesize

        4.0MB

      • memory/3144-51-0x0000000001BE0000-0x0000000001BE5000-memory.dmp

        Filesize

        20KB

      • memory/3144-48-0x0000000001BE0000-0x0000000001BE5000-memory.dmp

        Filesize

        20KB

      • memory/3144-47-0x00000000009F0000-0x0000000000A00000-memory.dmp

        Filesize

        64KB

      • memory/3144-31-0x00000000009F0000-0x0000000000A00000-memory.dmp

        Filesize

        64KB

      • memory/3144-45-0x00000000009F0000-0x0000000000A00000-memory.dmp

        Filesize

        64KB

      • memory/3144-32-0x00000000009F0000-0x0000000000A00000-memory.dmp

        Filesize

        64KB

      • memory/3144-43-0x00000000009F0000-0x0000000000A00000-memory.dmp

        Filesize

        64KB

      • memory/3144-42-0x00000000009F0000-0x0000000000A00000-memory.dmp

        Filesize

        64KB

      • memory/3144-41-0x00000000009F0000-0x0000000000A00000-memory.dmp

        Filesize

        64KB

      • memory/3144-40-0x00000000009F0000-0x0000000000A00000-memory.dmp

        Filesize

        64KB

      • memory/3144-39-0x00000000009F0000-0x0000000000A00000-memory.dmp

        Filesize

        64KB

      • memory/3144-38-0x00000000009F0000-0x0000000000A00000-memory.dmp

        Filesize

        64KB

      • memory/3144-37-0x00000000009F0000-0x0000000000A00000-memory.dmp

        Filesize

        64KB

      • memory/3144-36-0x00000000009F0000-0x0000000000A00000-memory.dmp

        Filesize

        64KB

      • memory/3144-35-0x00000000009F0000-0x0000000000A00000-memory.dmp

        Filesize

        64KB

      • memory/3144-34-0x00000000009F0000-0x0000000000A00000-memory.dmp

        Filesize

        64KB

      • memory/3144-33-0x00000000009F0000-0x0000000000A00000-memory.dmp

        Filesize

        64KB

      • memory/3636-7-0x0000000000400000-0x00000000005FE000-memory.dmp

        Filesize

        2.0MB

      • memory/3636-1-0x00000000008F0000-0x00000000009F0000-memory.dmp

        Filesize

        1024KB

      • memory/3636-2-0x0000000000750000-0x0000000000763000-memory.dmp

        Filesize

        76KB

      • memory/3636-4-0x0000000000400000-0x0000000000415000-memory.dmp

        Filesize

        84KB

      • memory/3636-9-0x0000000000400000-0x0000000000415000-memory.dmp

        Filesize

        84KB

      • memory/3636-8-0x0000000000750000-0x0000000000763000-memory.dmp

        Filesize

        76KB