Analysis

  • max time kernel
    148s
  • max time network
    154s
  • platform
    windows7_x64
  • resource
    win7-20240903-en
  • resource tags

    arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
  • submitted
    23-10-2024 04:02

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
  • 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:1620
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\ncqujweh\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:2340
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\ragrpew.exe" C:\Windows\SysWOW64\ncqujweh\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:2376
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" create ncqujweh binPath= "C:\Windows\SysWOW64\ncqujweh\ragrpew.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:2800
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" description ncqujweh "wifi internet conection"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:1968
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" start ncqujweh
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:2844
    • 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:2760
  • C:\Windows\SysWOW64\ncqujweh\ragrpew.exe
    C:\Windows\SysWOW64\ncqujweh\ragrpew.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:2892
    • 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:2896

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    11.3MB

    MD5

    71734e0e8af96d97b1482224fbab53d1

    SHA1

    e9331bb389747956590f630e4f78784abdb8d775

    SHA256

    79b1b985b65a94dfabdf8eff0288eed731f7c131d894efe810cc16cb1f5908d6

    SHA512

    3d64a0cbb176960ba2da291a30a6d92556064c5dba54eebf7c26d3d32599cd0fed025e8cc6ee5fd9ef2d180449167f754b7352386dae893bb6e29779465c174c

  • memory/1620-2-0x00000000002B0000-0x00000000002C3000-memory.dmp

    Filesize

    76KB

  • memory/1620-3-0x0000000000400000-0x0000000000415000-memory.dmp

    Filesize

    84KB

  • memory/1620-9-0x0000000000400000-0x0000000000415000-memory.dmp

    Filesize

    84KB

  • memory/1620-8-0x00000000002B0000-0x00000000002C3000-memory.dmp

    Filesize

    76KB

  • memory/1620-7-0x0000000000400000-0x0000000000539000-memory.dmp

    Filesize

    1.2MB

  • memory/1620-1-0x00000000005C0000-0x00000000006C0000-memory.dmp

    Filesize

    1024KB

  • memory/2892-17-0x0000000000400000-0x0000000000539000-memory.dmp

    Filesize

    1.2MB

  • memory/2896-50-0x0000000000170000-0x0000000000175000-memory.dmp

    Filesize

    20KB

  • memory/2896-46-0x0000000000160000-0x0000000000170000-memory.dmp

    Filesize

    64KB

  • memory/2896-11-0x00000000000C0000-0x00000000000D5000-memory.dmp

    Filesize

    84KB

  • memory/2896-14-0x00000000000C0000-0x00000000000D5000-memory.dmp

    Filesize

    84KB

  • memory/2896-18-0x00000000000C0000-0x00000000000D5000-memory.dmp

    Filesize

    84KB

  • memory/2896-20-0x00000000019C0000-0x0000000001BCF000-memory.dmp

    Filesize

    2.1MB

  • memory/2896-27-0x0000000000160000-0x0000000000170000-memory.dmp

    Filesize

    64KB

  • memory/2896-24-0x0000000000150000-0x0000000000156000-memory.dmp

    Filesize

    24KB

  • memory/2896-23-0x00000000019C0000-0x0000000001BCF000-memory.dmp

    Filesize

    2.1MB

  • memory/2896-44-0x0000000000160000-0x0000000000170000-memory.dmp

    Filesize

    64KB

  • memory/2896-16-0x00000000000C0000-0x00000000000D5000-memory.dmp

    Filesize

    84KB

  • memory/2896-55-0x00000000001D0000-0x00000000001D7000-memory.dmp

    Filesize

    28KB

  • memory/2896-51-0x0000000005460000-0x000000000586B000-memory.dmp

    Filesize

    4.0MB

  • memory/2896-54-0x0000000005460000-0x000000000586B000-memory.dmp

    Filesize

    4.0MB

  • memory/2896-47-0x0000000000170000-0x0000000000175000-memory.dmp

    Filesize

    20KB

  • memory/2896-13-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

    Filesize

    4KB

  • memory/2896-45-0x0000000000160000-0x0000000000170000-memory.dmp

    Filesize

    64KB

  • memory/2896-43-0x0000000000160000-0x0000000000170000-memory.dmp

    Filesize

    64KB

  • memory/2896-42-0x0000000000160000-0x0000000000170000-memory.dmp

    Filesize

    64KB

  • memory/2896-41-0x0000000000160000-0x0000000000170000-memory.dmp

    Filesize

    64KB

  • memory/2896-40-0x0000000000160000-0x0000000000170000-memory.dmp

    Filesize

    64KB

  • memory/2896-39-0x0000000000160000-0x0000000000170000-memory.dmp

    Filesize

    64KB

  • memory/2896-38-0x0000000000160000-0x0000000000170000-memory.dmp

    Filesize

    64KB

  • memory/2896-37-0x0000000000160000-0x0000000000170000-memory.dmp

    Filesize

    64KB

  • memory/2896-36-0x0000000000160000-0x0000000000170000-memory.dmp

    Filesize

    64KB

  • memory/2896-35-0x0000000000160000-0x0000000000170000-memory.dmp

    Filesize

    64KB

  • memory/2896-34-0x0000000000160000-0x0000000000170000-memory.dmp

    Filesize

    64KB

  • memory/2896-33-0x0000000000160000-0x0000000000170000-memory.dmp

    Filesize

    64KB

  • memory/2896-32-0x0000000000160000-0x0000000000170000-memory.dmp

    Filesize

    64KB

  • memory/2896-31-0x0000000000160000-0x0000000000170000-memory.dmp

    Filesize

    64KB

  • memory/2896-30-0x0000000000160000-0x0000000000170000-memory.dmp

    Filesize

    64KB