Analysis

  • max time kernel
    149s
  • max time network
    151s
  • platform
    windows7_x64
  • resource
    win7-20240903-en
  • resource tags

    arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
  • submitted
    25-11-2024 02:09

General

  • Target

    a2ec5b450e99f6ed3e965ba8c5c92eafb1bec8b0db255fd27340d48602488a58.exe

  • Size

    288KB

  • MD5

    9e125786a86974b62a002190eb597e63

  • SHA1

    7689e4ee11a586d89abe6f9ca712a01faeef2e07

  • SHA256

    a2ec5b450e99f6ed3e965ba8c5c92eafb1bec8b0db255fd27340d48602488a58

  • SHA512

    d9ef2479b59767bd7122c85588b6dedde8a2a3dd920051466163a460317c0dea4b9e22c673c8de03d52ab23477f97db5f40642b5c00ae8dddf77b549b7a197ce

  • SSDEEP

    6144:Fh40QUH+s8/rfkZlHIP50yrz7PYKpaZwxuN:FhBHX8/rfkzoR7rz7Pb8Zag

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
  • 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 6 IoCs
  • Suspicious use of WriteProcessMemory 30 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\a2ec5b450e99f6ed3e965ba8c5c92eafb1bec8b0db255fd27340d48602488a58.exe
    "C:\Users\Admin\AppData\Local\Temp\a2ec5b450e99f6ed3e965ba8c5c92eafb1bec8b0db255fd27340d48602488a58.exe"
    1⤵
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2184
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\wshvziyn\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:2712
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\myobpogk.exe" C:\Windows\SysWOW64\wshvziyn\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:1040
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" create wshvziyn binPath= "C:\Windows\SysWOW64\wshvziyn\myobpogk.exe /d\"C:\Users\Admin\AppData\Local\Temp\a2ec5b450e99f6ed3e965ba8c5c92eafb1bec8b0db255fd27340d48602488a58.exe\"" type= own start= auto DisplayName= "wifi support"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:2856
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" description wshvziyn "wifi internet conection"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:2824
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" start wshvziyn
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:2812
    • 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:2096
  • C:\Windows\SysWOW64\wshvziyn\myobpogk.exe
    C:\Windows\SysWOW64\wshvziyn\myobpogk.exe /d"C:\Users\Admin\AppData\Local\Temp\a2ec5b450e99f6ed3e965ba8c5c92eafb1bec8b0db255fd27340d48602488a58.exe"
    1⤵
    • Executes dropped EXE
    • Suspicious use of SetThreadContext
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2580
    • 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:3044

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    11.8MB

    MD5

    92253862b6e07552a2170bb846453764

    SHA1

    d86fd08e194613bbfd17f877b319caeb4822b8c3

    SHA256

    751e911815aaa7a25bfc3b584b831fd2d63f50fe482af012465427523b83764c

    SHA512

    8b623771911cbd4063dbdfa04a545aa9e72ae4c225ba49195068c4cd552ff4f22155f100bca5bab85b3879885884cee5d7de7ced5e3b12f7d63865f6aaaed4fc

  • memory/2184-16-0x0000000000400000-0x0000000000415000-memory.dmp

    Filesize

    84KB

  • memory/2184-2-0x00000000003C0000-0x00000000003D3000-memory.dmp

    Filesize

    76KB

  • memory/2184-3-0x0000000000400000-0x0000000000415000-memory.dmp

    Filesize

    84KB

  • memory/2184-1-0x0000000003190000-0x0000000003290000-memory.dmp

    Filesize

    1024KB

  • memory/2184-14-0x0000000000400000-0x0000000002D27000-memory.dmp

    Filesize

    41.2MB

  • memory/2184-15-0x00000000003C0000-0x00000000003D3000-memory.dmp

    Filesize

    76KB

  • memory/2580-12-0x0000000000400000-0x0000000002D27000-memory.dmp

    Filesize

    41.2MB

  • memory/3044-34-0x00000000003A0000-0x00000000003B0000-memory.dmp

    Filesize

    64KB

  • memory/3044-35-0x00000000003A0000-0x00000000003B0000-memory.dmp

    Filesize

    64KB

  • memory/3044-10-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

    Filesize

    4KB

  • memory/3044-17-0x0000000000080000-0x0000000000095000-memory.dmp

    Filesize

    84KB

  • memory/3044-18-0x0000000000080000-0x0000000000095000-memory.dmp

    Filesize

    84KB

  • memory/3044-20-0x0000000001A30000-0x0000000001C3F000-memory.dmp

    Filesize

    2.1MB

  • memory/3044-27-0x00000000003A0000-0x00000000003B0000-memory.dmp

    Filesize

    64KB

  • memory/3044-24-0x0000000000250000-0x0000000000256000-memory.dmp

    Filesize

    24KB

  • memory/3044-39-0x00000000003A0000-0x00000000003B0000-memory.dmp

    Filesize

    64KB

  • memory/3044-38-0x00000000003A0000-0x00000000003B0000-memory.dmp

    Filesize

    64KB

  • memory/3044-11-0x0000000000080000-0x0000000000095000-memory.dmp

    Filesize

    84KB

  • memory/3044-30-0x00000000003A0000-0x00000000003B0000-memory.dmp

    Filesize

    64KB

  • memory/3044-23-0x0000000001A30000-0x0000000001C3F000-memory.dmp

    Filesize

    2.1MB

  • memory/3044-37-0x00000000003A0000-0x00000000003B0000-memory.dmp

    Filesize

    64KB

  • memory/3044-36-0x00000000003A0000-0x00000000003B0000-memory.dmp

    Filesize

    64KB

  • memory/3044-8-0x0000000000080000-0x0000000000095000-memory.dmp

    Filesize

    84KB

  • memory/3044-33-0x00000000003A0000-0x00000000003B0000-memory.dmp

    Filesize

    64KB

  • memory/3044-55-0x0000000000470000-0x0000000000477000-memory.dmp

    Filesize

    28KB

  • memory/3044-54-0x0000000005540000-0x000000000594B000-memory.dmp

    Filesize

    4.0MB

  • memory/3044-51-0x0000000005540000-0x000000000594B000-memory.dmp

    Filesize

    4.0MB

  • memory/3044-50-0x00000000003C0000-0x00000000003C5000-memory.dmp

    Filesize

    20KB

  • memory/3044-47-0x00000000003C0000-0x00000000003C5000-memory.dmp

    Filesize

    20KB

  • memory/3044-46-0x00000000003A0000-0x00000000003B0000-memory.dmp

    Filesize

    64KB

  • memory/3044-45-0x00000000003A0000-0x00000000003B0000-memory.dmp

    Filesize

    64KB

  • memory/3044-44-0x00000000003A0000-0x00000000003B0000-memory.dmp

    Filesize

    64KB

  • memory/3044-43-0x00000000003A0000-0x00000000003B0000-memory.dmp

    Filesize

    64KB

  • memory/3044-42-0x00000000003A0000-0x00000000003B0000-memory.dmp

    Filesize

    64KB

  • memory/3044-41-0x00000000003A0000-0x00000000003B0000-memory.dmp

    Filesize

    64KB

  • memory/3044-40-0x00000000003A0000-0x00000000003B0000-memory.dmp

    Filesize

    64KB

  • memory/3044-32-0x00000000003A0000-0x00000000003B0000-memory.dmp

    Filesize

    64KB

  • memory/3044-31-0x00000000003A0000-0x00000000003B0000-memory.dmp

    Filesize

    64KB