Analysis

  • max time kernel
    85s
  • max time network
    86s
  • platform
    windows7_x64
  • resource
    win7-20240903-en
  • resource tags

    arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
  • submitted
    03-09-2024 07:07

General

  • Target

    0001160ade94fc6a9966f5db1029ad8b348f477d692526fce1d2d18c34694200(1).exe

  • Size

    143KB

  • MD5

    11a13a4119b82c74377f732e076d309b

  • SHA1

    ce30d46c4dedc1480e3932fc6ae80d3cbb1b2287

  • SHA256

    0001160ade94fc6a9966f5db1029ad8b348f477d692526fce1d2d18c34694200

  • SHA512

    885b44fe0c03be3cc16b54105ab9883d46f8056a73d073695a29bfa2a9ee28591785d6fa0fab9eb9facf4126351a199b990dd103dfcacf2661c5a562b95d2ba8

  • SSDEEP

    3072:WwlwoI6VD/+52UZ7iVAMhRnR9qp7KkD1k7y:Xw0VDy74AW/47pw

Malware Config

Extracted

Family

tofsee

C2

svartalfheim.top

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\0001160ade94fc6a9966f5db1029ad8b348f477d692526fce1d2d18c34694200(1).exe
    "C:\Users\Admin\AppData\Local\Temp\0001160ade94fc6a9966f5db1029ad8b348f477d692526fce1d2d18c34694200(1).exe"
    1⤵
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2488
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\nbfsotxi\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:1288
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\rdmazvej.exe" C:\Windows\SysWOW64\nbfsotxi\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:3020
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" create nbfsotxi binPath= "C:\Windows\SysWOW64\nbfsotxi\rdmazvej.exe /d\"C:\Users\Admin\AppData\Local\Temp\0001160ade94fc6a9966f5db1029ad8b348f477d692526fce1d2d18c34694200(1).exe\"" type= own start= auto DisplayName= "wifi support"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:2504
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" description nbfsotxi "wifi internet conection"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:2696
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" start nbfsotxi
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:2808
    • 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:2700
  • C:\Windows\SysWOW64\nbfsotxi\rdmazvej.exe
    C:\Windows\SysWOW64\nbfsotxi\rdmazvej.exe /d"C:\Users\Admin\AppData\Local\Temp\0001160ade94fc6a9966f5db1029ad8b348f477d692526fce1d2d18c34694200(1).exe"
    1⤵
    • Executes dropped EXE
    • Suspicious use of SetThreadContext
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2712
    • 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:2356

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads

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

    Filesize

    11.3MB

    MD5

    b6908bd53df503767bfc98eb0b281382

    SHA1

    0a2aaa2ad62972b3f0f73c8ef06c61fefe2c2119

    SHA256

    27a2ca5daecccc99348be56dc60c72643b9c36eb3fc3f09b517893b157dd314c

    SHA512

    5197ff588c0ec36150b1ae1dcd337c2848e568d4449b8f7f2d827ac30ad0bf8140a0bb68682bbde55eeb2a889eb07e14013f2302ab88cd72c2099c5d150d1cfe

  • memory/2356-41-0x00000000001A0000-0x00000000001B0000-memory.dmp

    Filesize

    64KB

  • memory/2356-36-0x00000000001A0000-0x00000000001B0000-memory.dmp

    Filesize

    64KB

  • memory/2356-54-0x0000000005650000-0x0000000005A5B000-memory.dmp

    Filesize

    4.0MB

  • memory/2356-39-0x00000000001A0000-0x00000000001B0000-memory.dmp

    Filesize

    64KB

  • memory/2356-32-0x00000000001A0000-0x00000000001B0000-memory.dmp

    Filesize

    64KB

  • memory/2356-34-0x00000000001A0000-0x00000000001B0000-memory.dmp

    Filesize

    64KB

  • memory/2356-11-0x00000000000C0000-0x00000000000D5000-memory.dmp

    Filesize

    84KB

  • memory/2356-35-0x00000000001A0000-0x00000000001B0000-memory.dmp

    Filesize

    64KB

  • memory/2356-16-0x00000000000C0000-0x00000000000D5000-memory.dmp

    Filesize

    84KB

  • memory/2356-14-0x00000000000C0000-0x00000000000D5000-memory.dmp

    Filesize

    84KB

  • memory/2356-13-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

    Filesize

    4KB

  • memory/2356-17-0x00000000000C0000-0x00000000000D5000-memory.dmp

    Filesize

    84KB

  • memory/2356-18-0x00000000000C0000-0x00000000000D5000-memory.dmp

    Filesize

    84KB

  • memory/2356-33-0x00000000001A0000-0x00000000001B0000-memory.dmp

    Filesize

    64KB

  • memory/2356-23-0x0000000001C60000-0x0000000001E6F000-memory.dmp

    Filesize

    2.1MB

  • memory/2356-24-0x0000000000190000-0x0000000000196000-memory.dmp

    Filesize

    24KB

  • memory/2356-27-0x00000000001A0000-0x00000000001B0000-memory.dmp

    Filesize

    64KB

  • memory/2356-30-0x00000000001A0000-0x00000000001B0000-memory.dmp

    Filesize

    64KB

  • memory/2356-31-0x00000000001A0000-0x00000000001B0000-memory.dmp

    Filesize

    64KB

  • memory/2356-40-0x00000000001A0000-0x00000000001B0000-memory.dmp

    Filesize

    64KB

  • memory/2356-20-0x0000000001C60000-0x0000000001E6F000-memory.dmp

    Filesize

    2.1MB

  • memory/2356-37-0x00000000001A0000-0x00000000001B0000-memory.dmp

    Filesize

    64KB

  • memory/2356-38-0x00000000001A0000-0x00000000001B0000-memory.dmp

    Filesize

    64KB

  • memory/2356-47-0x00000000002B0000-0x00000000002B5000-memory.dmp

    Filesize

    20KB

  • memory/2356-51-0x0000000005650000-0x0000000005A5B000-memory.dmp

    Filesize

    4.0MB

  • memory/2356-50-0x00000000002B0000-0x00000000002B5000-memory.dmp

    Filesize

    20KB

  • memory/2356-55-0x00000000003B0000-0x00000000003B7000-memory.dmp

    Filesize

    28KB

  • memory/2356-46-0x00000000001A0000-0x00000000001B0000-memory.dmp

    Filesize

    64KB

  • memory/2356-45-0x00000000001A0000-0x00000000001B0000-memory.dmp

    Filesize

    64KB

  • memory/2356-44-0x00000000001A0000-0x00000000001B0000-memory.dmp

    Filesize

    64KB

  • memory/2356-43-0x00000000001A0000-0x00000000001B0000-memory.dmp

    Filesize

    64KB

  • memory/2356-42-0x00000000001A0000-0x00000000001B0000-memory.dmp

    Filesize

    64KB

  • memory/2488-3-0x0000000000400000-0x0000000000415000-memory.dmp

    Filesize

    84KB

  • memory/2488-1-0x0000000000570000-0x0000000000670000-memory.dmp

    Filesize

    1024KB

  • memory/2488-7-0x0000000000400000-0x000000000045A000-memory.dmp

    Filesize

    360KB

  • memory/2488-8-0x0000000000220000-0x0000000000233000-memory.dmp

    Filesize

    76KB

  • memory/2488-9-0x0000000000400000-0x0000000000415000-memory.dmp

    Filesize

    84KB

  • memory/2488-2-0x0000000000220000-0x0000000000233000-memory.dmp

    Filesize

    76KB

  • memory/2712-15-0x0000000000400000-0x000000000045A000-memory.dmp

    Filesize

    360KB