Analysis

  • max time kernel
    149s
  • max time network
    151s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240802-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
  • submitted
    21-09-2024 16:55

General

  • Target

    27ca44d4fca5a29c0018efeebbda04250739a546e4b7879bd5a547aaea1de80d.exe

  • Size

    415KB

  • MD5

    1c5083792acfccf5d90db80884569ace

  • SHA1

    6be243663a2d173dcd728146f2a3d1a5a974ff38

  • SHA256

    27ca44d4fca5a29c0018efeebbda04250739a546e4b7879bd5a547aaea1de80d

  • SHA512

    8af309adcaed0055ca8b2c879a1ff16e9d0d853ab3837c94719d09c03bf27b32125581f525ef99caa4488b184bfc5565b033333cd4af9e4240aa23963dd76a1b

  • SSDEEP

    6144:+nhYTBI6ONsWWqOaejSlD8viNV43Km3Wlz8+5FXCnFk:2aTy6OlO3GDyYnSC

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
  • 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
  • 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.

  • Program crash 2 IoCs
  • 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 23 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\27ca44d4fca5a29c0018efeebbda04250739a546e4b7879bd5a547aaea1de80d.exe
    "C:\Users\Admin\AppData\Local\Temp\27ca44d4fca5a29c0018efeebbda04250739a546e4b7879bd5a547aaea1de80d.exe"
    1⤵
    • Checks computer location settings
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:4320
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\qjdnlwsg\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:636
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\lffxakoa.exe" C:\Windows\SysWOW64\qjdnlwsg\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:4828
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" create qjdnlwsg binPath= "C:\Windows\SysWOW64\qjdnlwsg\lffxakoa.exe /d\"C:\Users\Admin\AppData\Local\Temp\27ca44d4fca5a29c0018efeebbda04250739a546e4b7879bd5a547aaea1de80d.exe\"" type= own start= auto DisplayName= "wifi support"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:3016
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" description qjdnlwsg "wifi internet conection"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:3712
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" start qjdnlwsg
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:4596
    • 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:3960
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 4320 -s 1292
      2⤵
      • Program crash
      PID:2912
  • C:\Windows\SysWOW64\qjdnlwsg\lffxakoa.exe
    C:\Windows\SysWOW64\qjdnlwsg\lffxakoa.exe /d"C:\Users\Admin\AppData\Local\Temp\27ca44d4fca5a29c0018efeebbda04250739a546e4b7879bd5a547aaea1de80d.exe"
    1⤵
    • Executes dropped EXE
    • Suspicious use of SetThreadContext
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:1044
    • 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:2868
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 1044 -s 516
      2⤵
      • Program crash
      PID:2192
  • C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -pss -s 472 -p 4320 -ip 4320
    1⤵
      PID:4856
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -pss -s 480 -p 1044 -ip 1044
      1⤵
        PID:380

      Network

      MITRE ATT&CK Enterprise v15

      Replay Monitor

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      Downloads

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

        Filesize

        14.3MB

        MD5

        add3ec33df3e83dfa8267fa968fac44c

        SHA1

        4e172c724f8bfe119b6db97a1031c88fd049768d

        SHA256

        91dfdf331553679710f9365328c9a2bc1e4fa249b37cd7a093b45aac3d0b99de

        SHA512

        dfbf88e68e34dffe5fb3725c42b1747857a5b57a7d331278a0e3436768f9af1b022739b4c0999e666a8c202a30dc20ff06c5608834edbf3f1e39867d636e9228

      • memory/1044-15-0x0000000000400000-0x000000000247F000-memory.dmp

        Filesize

        32.5MB

      • memory/2868-40-0x0000000002760000-0x0000000002770000-memory.dmp

        Filesize

        64KB

      • memory/2868-20-0x0000000003000000-0x000000000320F000-memory.dmp

        Filesize

        2.1MB

      • memory/2868-21-0x0000000002750000-0x0000000002756000-memory.dmp

        Filesize

        24KB

      • memory/2868-39-0x0000000002760000-0x0000000002770000-memory.dmp

        Filesize

        64KB

      • memory/2868-33-0x0000000002760000-0x0000000002770000-memory.dmp

        Filesize

        64KB

      • memory/2868-38-0x0000000002760000-0x0000000002770000-memory.dmp

        Filesize

        64KB

      • memory/2868-13-0x00000000012B0000-0x00000000012C5000-memory.dmp

        Filesize

        84KB

      • memory/2868-14-0x00000000012B0000-0x00000000012C5000-memory.dmp

        Filesize

        84KB

      • memory/2868-18-0x0000000003000000-0x000000000320F000-memory.dmp

        Filesize

        2.1MB

      • memory/2868-42-0x0000000002760000-0x0000000002770000-memory.dmp

        Filesize

        64KB

      • memory/2868-52-0x00000000033D0000-0x00000000033D7000-memory.dmp

        Filesize

        28KB

      • memory/2868-48-0x0000000007E80000-0x000000000828B000-memory.dmp

        Filesize

        4.0MB

      • memory/2868-47-0x00000000027F0000-0x00000000027F5000-memory.dmp

        Filesize

        20KB

      • memory/2868-44-0x00000000027F0000-0x00000000027F5000-memory.dmp

        Filesize

        20KB

      • memory/2868-43-0x0000000002760000-0x0000000002770000-memory.dmp

        Filesize

        64KB

      • memory/2868-41-0x0000000002760000-0x0000000002770000-memory.dmp

        Filesize

        64KB

      • memory/2868-24-0x0000000002760000-0x0000000002770000-memory.dmp

        Filesize

        64KB

      • memory/2868-51-0x0000000007E80000-0x000000000828B000-memory.dmp

        Filesize

        4.0MB

      • memory/2868-11-0x00000000012B0000-0x00000000012C5000-memory.dmp

        Filesize

        84KB

      • memory/2868-37-0x0000000002760000-0x0000000002770000-memory.dmp

        Filesize

        64KB

      • memory/2868-36-0x0000000002760000-0x0000000002770000-memory.dmp

        Filesize

        64KB

      • memory/2868-35-0x0000000002760000-0x0000000002770000-memory.dmp

        Filesize

        64KB

      • memory/2868-34-0x0000000002760000-0x0000000002770000-memory.dmp

        Filesize

        64KB

      • memory/2868-32-0x0000000002760000-0x0000000002770000-memory.dmp

        Filesize

        64KB

      • memory/2868-31-0x0000000002760000-0x0000000002770000-memory.dmp

        Filesize

        64KB

      • memory/2868-27-0x0000000002760000-0x0000000002770000-memory.dmp

        Filesize

        64KB

      • memory/2868-30-0x0000000002760000-0x0000000002770000-memory.dmp

        Filesize

        64KB

      • memory/2868-29-0x0000000002760000-0x0000000002770000-memory.dmp

        Filesize

        64KB

      • memory/2868-28-0x0000000002760000-0x0000000002770000-memory.dmp

        Filesize

        64KB

      • memory/4320-3-0x0000000000400000-0x0000000000415000-memory.dmp

        Filesize

        84KB

      • memory/4320-7-0x0000000000400000-0x000000000247F000-memory.dmp

        Filesize

        32.5MB

      • memory/4320-1-0x00000000025B0000-0x00000000026B0000-memory.dmp

        Filesize

        1024KB

      • memory/4320-8-0x0000000002500000-0x0000000002513000-memory.dmp

        Filesize

        76KB

      • memory/4320-2-0x0000000002500000-0x0000000002513000-memory.dmp

        Filesize

        76KB

      • memory/4320-9-0x0000000000400000-0x0000000000415000-memory.dmp

        Filesize

        84KB