Analysis

  • max time kernel
    60s
  • max time network
    60s
  • platform
    windows7_x64
  • resource
    win7-20240708-en
  • resource tags

    arch:x64arch:x86image:win7-20240708-enlocale:en-usos:windows7-x64system
  • submitted
    11-10-2024 19:47

General

  • Target

    4940fa86109505f9f75f3852d1d86a38af4dd07e344f80469908ffaa354a1d48.exe

  • Size

    10.5MB

  • MD5

    7fb21c8ddc056e635e38d2b54e0f58ed

  • SHA1

    ee3d38330b9485e06a2bf4098fffbab3bcb92817

  • SHA256

    4940fa86109505f9f75f3852d1d86a38af4dd07e344f80469908ffaa354a1d48

  • SHA512

    10edeef859109cc83a57f561b572742cc1cac88cc30f7ca727e0097b4ec94d66d39a8effcbf893cf06047d4a6e7c8340ff7edf462c02d61488b35af6aac4088d

  • SSDEEP

    49152:cEtmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmm/:b

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.

  • 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 5 IoCs
  • Suspicious use of WriteProcessMemory 30 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\4940fa86109505f9f75f3852d1d86a38af4dd07e344f80469908ffaa354a1d48.exe
    "C:\Users\Admin\AppData\Local\Temp\4940fa86109505f9f75f3852d1d86a38af4dd07e344f80469908ffaa354a1d48.exe"
    1⤵
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2596
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\yksgtnep\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:2648
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\xateenoo.exe" C:\Windows\SysWOW64\yksgtnep\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:2760
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" create yksgtnep binPath= "C:\Windows\SysWOW64\yksgtnep\xateenoo.exe /d\"C:\Users\Admin\AppData\Local\Temp\4940fa86109505f9f75f3852d1d86a38af4dd07e344f80469908ffaa354a1d48.exe\"" type= own start= auto DisplayName= "wifi support"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:2788
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" description yksgtnep "wifi internet conection"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:2920
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" start yksgtnep
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:2848
    • 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:2524
  • C:\Windows\SysWOW64\yksgtnep\xateenoo.exe
    C:\Windows\SysWOW64\yksgtnep\xateenoo.exe /d"C:\Users\Admin\AppData\Local\Temp\4940fa86109505f9f75f3852d1d86a38af4dd07e344f80469908ffaa354a1d48.exe"
    1⤵
    • Executes dropped EXE
    • Suspicious use of SetThreadContext
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2544
    • 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:2616

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads

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

    Filesize

    11.6MB

    MD5

    7fbb2d1b91b101116bb34eb0a0031319

    SHA1

    deeb98ee00551d162db626a62b2dc5f90e1b4e59

    SHA256

    fe330aa556b4673b1df82d34239769f769b6df4071ceaa5e3e853ff9b0611a24

    SHA512

    14c323dce5b0409e9a451845346b54c0b9689a7f5a078ca634e36a41b82b6fc3f66d8a56c6922ef77c99d15fc53f3bcdde04754659b139f20eeab1b70f2f0d21

  • memory/2544-13-0x0000000000400000-0x0000000000683000-memory.dmp

    Filesize

    2.5MB

  • memory/2596-16-0x0000000000400000-0x0000000000415000-memory.dmp

    Filesize

    84KB

  • memory/2596-2-0x0000000000220000-0x0000000000233000-memory.dmp

    Filesize

    76KB

  • memory/2596-3-0x0000000000400000-0x0000000000415000-memory.dmp

    Filesize

    84KB

  • memory/2596-1-0x0000000000810000-0x0000000000910000-memory.dmp

    Filesize

    1024KB

  • memory/2596-14-0x0000000000400000-0x0000000000683000-memory.dmp

    Filesize

    2.5MB

  • memory/2596-15-0x0000000000220000-0x0000000000233000-memory.dmp

    Filesize

    76KB

  • memory/2616-38-0x0000000000120000-0x0000000000130000-memory.dmp

    Filesize

    64KB

  • memory/2616-46-0x0000000000120000-0x0000000000130000-memory.dmp

    Filesize

    64KB

  • memory/2616-10-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

    Filesize

    4KB

  • memory/2616-17-0x0000000000080000-0x0000000000095000-memory.dmp

    Filesize

    84KB

  • memory/2616-18-0x0000000000080000-0x0000000000095000-memory.dmp

    Filesize

    84KB

  • memory/2616-23-0x0000000001940000-0x0000000001B4F000-memory.dmp

    Filesize

    2.1MB

  • memory/2616-20-0x0000000001940000-0x0000000001B4F000-memory.dmp

    Filesize

    2.1MB

  • memory/2616-24-0x0000000000110000-0x0000000000116000-memory.dmp

    Filesize

    24KB

  • memory/2616-27-0x0000000000120000-0x0000000000130000-memory.dmp

    Filesize

    64KB

  • memory/2616-36-0x0000000000120000-0x0000000000130000-memory.dmp

    Filesize

    64KB

  • memory/2616-12-0x0000000000080000-0x0000000000095000-memory.dmp

    Filesize

    84KB

  • memory/2616-55-0x0000000000300000-0x0000000000307000-memory.dmp

    Filesize

    28KB

  • memory/2616-52-0x00000000055C0000-0x00000000059CB000-memory.dmp

    Filesize

    4.0MB

  • memory/2616-50-0x0000000000230000-0x0000000000235000-memory.dmp

    Filesize

    20KB

  • memory/2616-47-0x0000000000230000-0x0000000000235000-memory.dmp

    Filesize

    20KB

  • memory/2616-8-0x0000000000080000-0x0000000000095000-memory.dmp

    Filesize

    84KB

  • memory/2616-45-0x0000000000120000-0x0000000000130000-memory.dmp

    Filesize

    64KB

  • memory/2616-44-0x0000000000120000-0x0000000000130000-memory.dmp

    Filesize

    64KB

  • memory/2616-43-0x0000000000120000-0x0000000000130000-memory.dmp

    Filesize

    64KB

  • memory/2616-42-0x0000000000120000-0x0000000000130000-memory.dmp

    Filesize

    64KB

  • memory/2616-41-0x0000000000120000-0x0000000000130000-memory.dmp

    Filesize

    64KB

  • memory/2616-40-0x0000000000120000-0x0000000000130000-memory.dmp

    Filesize

    64KB

  • memory/2616-39-0x0000000000120000-0x0000000000130000-memory.dmp

    Filesize

    64KB

  • memory/2616-37-0x0000000000120000-0x0000000000130000-memory.dmp

    Filesize

    64KB

  • memory/2616-35-0x0000000000120000-0x0000000000130000-memory.dmp

    Filesize

    64KB

  • memory/2616-34-0x0000000000120000-0x0000000000130000-memory.dmp

    Filesize

    64KB

  • memory/2616-33-0x0000000000120000-0x0000000000130000-memory.dmp

    Filesize

    64KB

  • memory/2616-32-0x0000000000120000-0x0000000000130000-memory.dmp

    Filesize

    64KB

  • memory/2616-31-0x0000000000120000-0x0000000000130000-memory.dmp

    Filesize

    64KB

  • memory/2616-30-0x0000000000120000-0x0000000000130000-memory.dmp

    Filesize

    64KB

  • memory/2616-54-0x00000000055C0000-0x00000000059CB000-memory.dmp

    Filesize

    4.0MB