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Analysis

  • max time kernel
    145s
  • max time network
    154s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20241007-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
  • submitted
    28/01/2025, 05:38

General

  • Target

    0a00671012b4cc6d328abe79ae061427f25595a5996d78dba6522d13abb23647.exe

  • Size

    10.7MB

  • MD5

    27d42e4a1a5137d5a8171fa0998feff6

  • SHA1

    c286cbcc0c3840a5c086016a9f432acdb2466bf5

  • SHA256

    0a00671012b4cc6d328abe79ae061427f25595a5996d78dba6522d13abb23647

  • SHA512

    2df5b37a8d89a632b780c2e01c0407216b66e2c9495b55d5fb7f984d6eaad409d2a1cc1f6c25f4c26b7e0c13cc89731d0f7baef1f781da642e31cea358c422db

  • SSDEEP

    3072:WcSKLbut7BWLMcD/FHNKZuKqtyONJvq4H6gGIvuFHrHtIxJXA4/a9t/a9t/a9t/6:gKHOWwe/RNKkK0vNdq4HZG0Wr2u

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.

  • Tofsee family
  • Creates new service(s) 2 TTPs
  • Modifies Windows Firewall 2 TTPs 1 IoCs
  • Sets service image path in registry 2 TTPs 1 IoCs
  • Checks computer location settings 2 TTPs 1 IoCs

    Looks up country code configured in the registry, likely geofence.

  • Deletes itself 1 IoCs
  • Executes dropped EXE 1 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.

  • Suspicious use of WriteProcessMemory 23 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\0a00671012b4cc6d328abe79ae061427f25595a5996d78dba6522d13abb23647.exe
    "C:\Users\Admin\AppData\Local\Temp\0a00671012b4cc6d328abe79ae061427f25595a5996d78dba6522d13abb23647.exe"
    1⤵
    • Checks computer location settings
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:3016
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\kvfibhuj\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:3384
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\ragrpew.exe" C:\Windows\SysWOW64\kvfibhuj\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:4544
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" create kvfibhuj binPath= "C:\Windows\SysWOW64\kvfibhuj\ragrpew.exe /d\"C:\Users\Admin\AppData\Local\Temp\0a00671012b4cc6d328abe79ae061427f25595a5996d78dba6522d13abb23647.exe\"" type= own start= auto DisplayName= "wifi support"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:2012
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" description kvfibhuj "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 kvfibhuj
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:2124
    • 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:1180
  • C:\Windows\SysWOW64\kvfibhuj\ragrpew.exe
    C:\Windows\SysWOW64\kvfibhuj\ragrpew.exe /d"C:\Users\Admin\AppData\Local\Temp\0a00671012b4cc6d328abe79ae061427f25595a5996d78dba6522d13abb23647.exe"
    1⤵
    • Executes dropped EXE
    • Suspicious use of SetThreadContext
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:1140
    • C:\Windows\SysWOW64\svchost.exe
      svchost.exe
      2⤵
      • Sets service image path in registry
      • Deletes itself
      • System Location Discovery: System Language Discovery
      PID:4268

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    11.0MB

    MD5

    cf4efd24d32d1e348762a57ee07b8229

    SHA1

    96484638eeee608118f5cbbca3e42bb50d45fe8e

    SHA256

    176c396737c698f1088f449f5bd90a7b39a6027719314f54286c8469a85d819a

    SHA512

    fcaf644a2e363a585247ef922a589167690fa947067d15181220d27285e128e6d2f322f4693072d9bbe0f69d78a953510f047c7da4c0b55552f094817ac02c60

  • memory/1140-14-0x0000000000400000-0x0000000002284000-memory.dmp

    Filesize

    30.5MB

  • memory/3016-1-0x0000000002440000-0x0000000002540000-memory.dmp

    Filesize

    1024KB

  • memory/3016-2-0x0000000003FE0000-0x0000000003FF3000-memory.dmp

    Filesize

    76KB

  • memory/3016-3-0x0000000000400000-0x0000000000415000-memory.dmp

    Filesize

    84KB

  • memory/3016-7-0x0000000000400000-0x0000000002284000-memory.dmp

    Filesize

    30.5MB

  • memory/3016-9-0x0000000000400000-0x0000000000415000-memory.dmp

    Filesize

    84KB

  • memory/3016-8-0x0000000003FE0000-0x0000000003FF3000-memory.dmp

    Filesize

    76KB

  • memory/4268-11-0x0000000000CF0000-0x0000000000D05000-memory.dmp

    Filesize

    84KB

  • memory/4268-13-0x0000000000CF0000-0x0000000000D05000-memory.dmp

    Filesize

    84KB

  • memory/4268-15-0x0000000000CF0000-0x0000000000D05000-memory.dmp

    Filesize

    84KB