Analysis

  • max time kernel
    150s
  • max time network
    151s
  • platform
    windows7_x64
  • resource
    win7-20240903-en
  • resource tags

    arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
  • submitted
    06/09/2024, 07:27

General

  • Target

    8b9be712ba5f26a1f6369833d52193fb.exe

  • Size

    214KB

  • MD5

    8b9be712ba5f26a1f6369833d52193fb

  • SHA1

    187b0a0888114923e4f611ed90402d7bf0e21733

  • SHA256

    6b880d602f77fc4061a3f6b0a7619e9a8899d9e61eeeea4460eec1d900aeb66f

  • SHA512

    33c457fab7b2910452de37d2a263d46b2391bb4b34b0c37793b6f5875180e92cb2caebfb2ab08e72393b0230407505c94eef6b41040c1500b2b4393fb3b58d08

  • SSDEEP

    3072:YASCGfSRnbJBJ0IQALHFv0raVXyPg9a+lfB0pyTbQ:0fSRnbJBJTLlr04C6

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 6 IoCs
  • Suspicious use of WriteProcessMemory 30 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\8b9be712ba5f26a1f6369833d52193fb.exe
    "C:\Users\Admin\AppData\Local\Temp\8b9be712ba5f26a1f6369833d52193fb.exe"
    1⤵
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2816
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\ikqfhgpx\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:2320
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\jhwexnie.exe" C:\Windows\SysWOW64\ikqfhgpx\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:2080
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" create ikqfhgpx binPath= "C:\Windows\SysWOW64\ikqfhgpx\jhwexnie.exe /d\"C:\Users\Admin\AppData\Local\Temp\8b9be712ba5f26a1f6369833d52193fb.exe\"" type= own start= auto DisplayName= "wifi support"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:2992
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" description ikqfhgpx "wifi internet conection"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:2096
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" start ikqfhgpx
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:1884
    • 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:2092
  • C:\Windows\SysWOW64\ikqfhgpx\jhwexnie.exe
    C:\Windows\SysWOW64\ikqfhgpx\jhwexnie.exe /d"C:\Users\Admin\AppData\Local\Temp\8b9be712ba5f26a1f6369833d52193fb.exe"
    1⤵
    • Executes dropped EXE
    • Suspicious use of SetThreadContext
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2756
    • 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:2696

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    14.0MB

    MD5

    190c492b62a6ef8615bf4b868b934369

    SHA1

    e08e4b910cc9d8ca714ac4ccd7e6e9b4da6a4dbf

    SHA256

    0538409e17a281d9535e4ea69bf7f2765df1b87e4c92375cde36fddaf186d8b0

    SHA512

    1d36599cf7afead7bf8074c411cc9bac4d04c3c711173b9050e04f5741a232c9244e68e689e41d647dcd9217e98f6d9f8b075e9d74fccf8bab280e884bceb67c

  • memory/2696-39-0x0000000000120000-0x0000000000130000-memory.dmp

    Filesize

    64KB

  • memory/2696-46-0x0000000000120000-0x0000000000130000-memory.dmp

    Filesize

    64KB

  • memory/2696-55-0x00000000004F0000-0x00000000004F7000-memory.dmp

    Filesize

    28KB

  • memory/2696-11-0x0000000000080000-0x0000000000095000-memory.dmp

    Filesize

    84KB

  • memory/2696-10-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

    Filesize

    4KB

  • memory/2696-8-0x0000000000080000-0x0000000000095000-memory.dmp

    Filesize

    84KB

  • memory/2696-51-0x0000000005610000-0x0000000005A1B000-memory.dmp

    Filesize

    4.0MB

  • memory/2696-54-0x0000000005610000-0x0000000005A1B000-memory.dmp

    Filesize

    4.0MB

  • memory/2696-30-0x0000000000120000-0x0000000000130000-memory.dmp

    Filesize

    64KB

  • memory/2696-45-0x0000000000120000-0x0000000000130000-memory.dmp

    Filesize

    64KB

  • memory/2696-17-0x0000000000080000-0x0000000000095000-memory.dmp

    Filesize

    84KB

  • memory/2696-18-0x0000000000080000-0x0000000000095000-memory.dmp

    Filesize

    84KB

  • memory/2696-23-0x00000000018F0000-0x0000000001AFF000-memory.dmp

    Filesize

    2.1MB

  • memory/2696-24-0x0000000000110000-0x0000000000116000-memory.dmp

    Filesize

    24KB

  • memory/2696-27-0x0000000000120000-0x0000000000130000-memory.dmp

    Filesize

    64KB

  • memory/2696-20-0x00000000018F0000-0x0000000001AFF000-memory.dmp

    Filesize

    2.1MB

  • memory/2696-34-0x0000000000120000-0x0000000000130000-memory.dmp

    Filesize

    64KB

  • memory/2696-50-0x00000000002B0000-0x00000000002B5000-memory.dmp

    Filesize

    20KB

  • memory/2696-31-0x0000000000120000-0x0000000000130000-memory.dmp

    Filesize

    64KB

  • memory/2696-47-0x00000000002B0000-0x00000000002B5000-memory.dmp

    Filesize

    20KB

  • memory/2696-32-0x0000000000120000-0x0000000000130000-memory.dmp

    Filesize

    64KB

  • memory/2696-44-0x0000000000120000-0x0000000000130000-memory.dmp

    Filesize

    64KB

  • memory/2696-43-0x0000000000120000-0x0000000000130000-memory.dmp

    Filesize

    64KB

  • memory/2696-42-0x0000000000120000-0x0000000000130000-memory.dmp

    Filesize

    64KB

  • memory/2696-41-0x0000000000120000-0x0000000000130000-memory.dmp

    Filesize

    64KB

  • memory/2696-40-0x0000000000120000-0x0000000000130000-memory.dmp

    Filesize

    64KB

  • memory/2696-33-0x0000000000120000-0x0000000000130000-memory.dmp

    Filesize

    64KB

  • memory/2696-38-0x0000000000120000-0x0000000000130000-memory.dmp

    Filesize

    64KB

  • memory/2696-37-0x0000000000120000-0x0000000000130000-memory.dmp

    Filesize

    64KB

  • memory/2696-36-0x0000000000120000-0x0000000000130000-memory.dmp

    Filesize

    64KB

  • memory/2696-35-0x0000000000120000-0x0000000000130000-memory.dmp

    Filesize

    64KB

  • memory/2756-12-0x0000000000400000-0x000000000043C000-memory.dmp

    Filesize

    240KB

  • memory/2816-1-0x0000000000560000-0x0000000000660000-memory.dmp

    Filesize

    1024KB

  • memory/2816-14-0x0000000000400000-0x000000000043C000-memory.dmp

    Filesize

    240KB

  • memory/2816-3-0x0000000000400000-0x0000000000415000-memory.dmp

    Filesize

    84KB

  • memory/2816-15-0x0000000000220000-0x0000000000233000-memory.dmp

    Filesize

    76KB

  • memory/2816-16-0x0000000000400000-0x0000000000415000-memory.dmp

    Filesize

    84KB

  • memory/2816-2-0x0000000000220000-0x0000000000233000-memory.dmp

    Filesize

    76KB