Analysis

  • max time kernel
    147s
  • max time network
    150s
  • platform
    windows11-21h2_x64
  • resource
    win11-20240802-en
  • resource tags

    arch:x64arch:x86image:win11-20240802-enlocale:en-usos:windows11-21h2-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
  • 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 7 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⤵
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2584
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\idqlwlpe\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:1056
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\myobpogk.exe" C:\Windows\SysWOW64\idqlwlpe\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:2504
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" create idqlwlpe binPath= "C:\Windows\SysWOW64\idqlwlpe\myobpogk.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:2252
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" description idqlwlpe "wifi internet conection"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:4864
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" start idqlwlpe
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:8
    • 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:3196
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 2584 -s 1096
      2⤵
      • Program crash
      PID:5048
  • C:\Windows\SysWOW64\idqlwlpe\myobpogk.exe
    C:\Windows\SysWOW64\idqlwlpe\myobpogk.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:1980
    • 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:3480
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 1980 -s 560
      2⤵
      • Program crash
      PID:4444
  • C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -pss -s 420 -p 2584 -ip 2584
    1⤵
      PID:2628
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -pss -s 524 -p 1980 -ip 1980
      1⤵
        PID:3384

      Network

      MITRE ATT&CK Enterprise v15

      Replay Monitor

      Loading Replay Monitor...

      Downloads

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

        Filesize

        10.2MB

        MD5

        e79bfb34582ee8dc7e2f2a6e166bf0d5

        SHA1

        744bd7f310cad5427dce2fb309d0dff655d847f8

        SHA256

        3787a2940ba999b6cc487e8b64eaa2771f91d2ac5f2da554557c7ccd73c07636

        SHA512

        9ed8a5cc9281ce2c13809bbc8c2f0c9e605dce8b0b6039d83520c7a3eaf90950b5d343412652c79b8c716b5202a2325f84b223add11625774586f94d4ea3fcbe

      • memory/1980-16-0x0000000000400000-0x00000000005FE000-memory.dmp

        Filesize

        2.0MB

      • memory/1980-9-0x0000000000400000-0x00000000005FE000-memory.dmp

        Filesize

        2.0MB

      • memory/1980-8-0x0000000000400000-0x00000000005FE000-memory.dmp

        Filesize

        2.0MB

      • memory/2584-1-0x0000000000830000-0x0000000000930000-memory.dmp

        Filesize

        1024KB

      • memory/2584-3-0x0000000000400000-0x0000000000415000-memory.dmp

        Filesize

        84KB

      • memory/2584-2-0x0000000002450000-0x0000000002463000-memory.dmp

        Filesize

        76KB

      • memory/2584-14-0x0000000000400000-0x0000000000415000-memory.dmp

        Filesize

        84KB

      • memory/2584-13-0x0000000002450000-0x0000000002463000-memory.dmp

        Filesize

        76KB

      • memory/2584-12-0x0000000000400000-0x00000000005FE000-memory.dmp

        Filesize

        2.0MB

      • memory/3480-46-0x00000000009E0000-0x00000000009F0000-memory.dmp

        Filesize

        64KB

      • memory/3480-39-0x00000000009E0000-0x00000000009F0000-memory.dmp

        Filesize

        64KB

      • memory/3480-18-0x00000000003B0000-0x00000000003C5000-memory.dmp

        Filesize

        84KB

      • memory/3480-55-0x0000000001BE0000-0x0000000001BE7000-memory.dmp

        Filesize

        28KB

      • memory/3480-54-0x0000000007280000-0x000000000768B000-memory.dmp

        Filesize

        4.0MB

      • memory/3480-51-0x0000000007280000-0x000000000768B000-memory.dmp

        Filesize

        4.0MB

      • memory/3480-50-0x00000000009F0000-0x00000000009F5000-memory.dmp

        Filesize

        20KB

      • memory/3480-47-0x00000000009F0000-0x00000000009F5000-memory.dmp

        Filesize

        20KB

      • memory/3480-10-0x00000000003B0000-0x00000000003C5000-memory.dmp

        Filesize

        84KB

      • memory/3480-45-0x00000000009E0000-0x00000000009F0000-memory.dmp

        Filesize

        64KB

      • memory/3480-44-0x00000000009E0000-0x00000000009F0000-memory.dmp

        Filesize

        64KB

      • memory/3480-43-0x00000000009E0000-0x00000000009F0000-memory.dmp

        Filesize

        64KB

      • memory/3480-42-0x00000000009E0000-0x00000000009F0000-memory.dmp

        Filesize

        64KB

      • memory/3480-41-0x00000000009E0000-0x00000000009F0000-memory.dmp

        Filesize

        64KB

      • memory/3480-40-0x00000000009E0000-0x00000000009F0000-memory.dmp

        Filesize

        64KB

      • memory/3480-17-0x00000000003B0000-0x00000000003C5000-memory.dmp

        Filesize

        84KB

      • memory/3480-38-0x00000000009E0000-0x00000000009F0000-memory.dmp

        Filesize

        64KB

      • memory/3480-37-0x00000000009E0000-0x00000000009F0000-memory.dmp

        Filesize

        64KB

      • memory/3480-36-0x00000000009E0000-0x00000000009F0000-memory.dmp

        Filesize

        64KB

      • memory/3480-35-0x00000000009E0000-0x00000000009F0000-memory.dmp

        Filesize

        64KB

      • memory/3480-34-0x00000000009E0000-0x00000000009F0000-memory.dmp

        Filesize

        64KB

      • memory/3480-33-0x00000000009E0000-0x00000000009F0000-memory.dmp

        Filesize

        64KB

      • memory/3480-32-0x00000000009E0000-0x00000000009F0000-memory.dmp

        Filesize

        64KB

      • memory/3480-31-0x00000000009E0000-0x00000000009F0000-memory.dmp

        Filesize

        64KB

      • memory/3480-30-0x00000000009E0000-0x00000000009F0000-memory.dmp

        Filesize

        64KB

      • memory/3480-23-0x0000000002400000-0x000000000260F000-memory.dmp

        Filesize

        2.1MB

      • memory/3480-20-0x0000000002400000-0x000000000260F000-memory.dmp

        Filesize

        2.1MB

      • memory/3480-27-0x00000000009E0000-0x00000000009F0000-memory.dmp

        Filesize

        64KB

      • memory/3480-24-0x0000000000980000-0x0000000000986000-memory.dmp

        Filesize

        24KB