Analysis

  • max time kernel
    117s
  • max time network
    119s
  • platform
    windows7_x64
  • resource
    win7-20240903-en
  • resource tags

    arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
  • submitted
    23-10-2024 03:59

General

  • Target

    ee0a8975ce97cb4e237571b3bde6deb777b1995766c46f89e722e2ee44392537N.exe

  • Size

    247KB

  • MD5

    fa16a1112580ef5e90e09191b5b7c7b0

  • SHA1

    b89e96ca675fd9046657523e8ed63e2559ae35f2

  • SHA256

    ee0a8975ce97cb4e237571b3bde6deb777b1995766c46f89e722e2ee44392537

  • SHA512

    25ec5abdbcc7de061dc3b4c50d5285f0a75f52395f70c52e58397e0f4ed8952cbab22de04287ea2ea987d5fd5a610e453475ad05ea0f2240ad97aebc3aa5f422

  • SSDEEP

    3072:3uaLCc5NJCyZawVL1NbZyEC5ZXVYz3M5coy4ixZ2Hzaej:+aLCEjFZawVL1xuFYc5coIi

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.

  • Windows security bypass 2 TTPs 1 IoCs
  • 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
  • Looks up external IP address via web service 2 IoCs

    Uses a legitimate IP lookup service to find the infected system's external IP.

  • 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 7 IoCs
  • Suspicious use of WriteProcessMemory 30 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\ee0a8975ce97cb4e237571b3bde6deb777b1995766c46f89e722e2ee44392537N.exe
    "C:\Users\Admin\AppData\Local\Temp\ee0a8975ce97cb4e237571b3bde6deb777b1995766c46f89e722e2ee44392537N.exe"
    1⤵
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:1672
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\fmpbhkvd\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:1344
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\vtdegcfl.exe" C:\Windows\SysWOW64\fmpbhkvd\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:2720
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" create fmpbhkvd binPath= "C:\Windows\SysWOW64\fmpbhkvd\vtdegcfl.exe /d\"C:\Users\Admin\AppData\Local\Temp\ee0a8975ce97cb4e237571b3bde6deb777b1995766c46f89e722e2ee44392537N.exe\"" type= own start= auto DisplayName= "wifi support"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:2628
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" description fmpbhkvd "wifi internet conection"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:2616
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" start fmpbhkvd
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:2788
    • 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:2772
  • C:\Windows\SysWOW64\fmpbhkvd\vtdegcfl.exe
    C:\Windows\SysWOW64\fmpbhkvd\vtdegcfl.exe /d"C:\Users\Admin\AppData\Local\Temp\ee0a8975ce97cb4e237571b3bde6deb777b1995766c46f89e722e2ee44392537N.exe"
    1⤵
    • Executes dropped EXE
    • Suspicious use of SetThreadContext
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2688
    • C:\Windows\SysWOW64\svchost.exe
      svchost.exe
      2⤵
      • Windows security bypass
      • 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:2576

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    11.2MB

    MD5

    f7c9eb6a7162091e0e305a19409135ac

    SHA1

    644a6551f6ba338c2fa05d167782434501c4c2f5

    SHA256

    56a3333ce6b2bc207a060b30ba2f6afb482f3b926af69c396ad09aa14bf009d5

    SHA512

    fe66540f2123dd6e48b659cfe3f56d499c3e8cb68b1474a430ca1fa6c6f1e9755127f7932809df4b09ee74872dc98411f6c8ddeb45f362ef0778e66d32adc3f1

  • memory/1672-1-0x0000000000650000-0x0000000000750000-memory.dmp

    Filesize

    1024KB

  • memory/1672-2-0x0000000000400000-0x0000000000415000-memory.dmp

    Filesize

    84KB

  • memory/1672-4-0x0000000000400000-0x0000000000539000-memory.dmp

    Filesize

    1.2MB

  • memory/1672-9-0x0000000000400000-0x0000000000415000-memory.dmp

    Filesize

    84KB

  • memory/1672-8-0x0000000000400000-0x0000000000539000-memory.dmp

    Filesize

    1.2MB

  • memory/2576-39-0x00000000000F0000-0x0000000000100000-memory.dmp

    Filesize

    64KB

  • memory/2576-43-0x00000000000F0000-0x0000000000100000-memory.dmp

    Filesize

    64KB

  • memory/2576-13-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

    Filesize

    4KB

  • memory/2576-55-0x0000000000250000-0x0000000000257000-memory.dmp

    Filesize

    28KB

  • memory/2576-16-0x00000000000C0000-0x00000000000D5000-memory.dmp

    Filesize

    84KB

  • memory/2576-17-0x00000000000C0000-0x00000000000D5000-memory.dmp

    Filesize

    84KB

  • memory/2576-18-0x00000000000C0000-0x00000000000D5000-memory.dmp

    Filesize

    84KB

  • memory/2576-20-0x0000000001910000-0x0000000001B1F000-memory.dmp

    Filesize

    2.1MB

  • memory/2576-23-0x0000000001910000-0x0000000001B1F000-memory.dmp

    Filesize

    2.1MB

  • memory/2576-27-0x00000000000F0000-0x0000000000100000-memory.dmp

    Filesize

    64KB

  • memory/2576-51-0x0000000005560000-0x000000000596B000-memory.dmp

    Filesize

    4.0MB

  • memory/2576-54-0x0000000005560000-0x000000000596B000-memory.dmp

    Filesize

    4.0MB

  • memory/2576-50-0x0000000000200000-0x0000000000205000-memory.dmp

    Filesize

    20KB

  • memory/2576-47-0x0000000000200000-0x0000000000205000-memory.dmp

    Filesize

    20KB

  • memory/2576-46-0x00000000000F0000-0x0000000000100000-memory.dmp

    Filesize

    64KB

  • memory/2576-45-0x00000000000F0000-0x0000000000100000-memory.dmp

    Filesize

    64KB

  • memory/2576-44-0x00000000000F0000-0x0000000000100000-memory.dmp

    Filesize

    64KB

  • memory/2576-14-0x00000000000C0000-0x00000000000D5000-memory.dmp

    Filesize

    84KB

  • memory/2576-42-0x00000000000F0000-0x0000000000100000-memory.dmp

    Filesize

    64KB

  • memory/2576-41-0x00000000000F0000-0x0000000000100000-memory.dmp

    Filesize

    64KB

  • memory/2576-40-0x00000000000F0000-0x0000000000100000-memory.dmp

    Filesize

    64KB

  • memory/2576-11-0x00000000000C0000-0x00000000000D5000-memory.dmp

    Filesize

    84KB

  • memory/2576-38-0x00000000000F0000-0x0000000000100000-memory.dmp

    Filesize

    64KB

  • memory/2576-37-0x00000000000F0000-0x0000000000100000-memory.dmp

    Filesize

    64KB

  • memory/2576-36-0x00000000000F0000-0x0000000000100000-memory.dmp

    Filesize

    64KB

  • memory/2576-35-0x00000000000F0000-0x0000000000100000-memory.dmp

    Filesize

    64KB

  • memory/2576-34-0x00000000000F0000-0x0000000000100000-memory.dmp

    Filesize

    64KB

  • memory/2576-33-0x00000000000F0000-0x0000000000100000-memory.dmp

    Filesize

    64KB

  • memory/2576-32-0x00000000000F0000-0x0000000000100000-memory.dmp

    Filesize

    64KB

  • memory/2576-31-0x00000000000F0000-0x0000000000100000-memory.dmp

    Filesize

    64KB

  • memory/2576-30-0x00000000000F0000-0x0000000000100000-memory.dmp

    Filesize

    64KB

  • memory/2576-24-0x00000000000E0000-0x00000000000E6000-memory.dmp

    Filesize

    24KB

  • memory/2688-15-0x0000000000400000-0x0000000000539000-memory.dmp

    Filesize

    1.2MB