Analysis

  • max time kernel
    141s
  • max time network
    151s
  • platform
    windows7_x64
  • resource
    win7-20240903-en
  • resource tags

    arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
  • submitted
    22-09-2024 01:07

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.

  • 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\27ca44d4fca5a29c0018efeebbda04250739a546e4b7879bd5a547aaea1de80d.exe
    "C:\Users\Admin\AppData\Local\Temp\27ca44d4fca5a29c0018efeebbda04250739a546e4b7879bd5a547aaea1de80d.exe"
    1⤵
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:1640
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\xwkoyhml\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:2516
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\ipwzocvf.exe" C:\Windows\SysWOW64\xwkoyhml\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:2544
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" create xwkoyhml binPath= "C:\Windows\SysWOW64\xwkoyhml\ipwzocvf.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:2244
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" description xwkoyhml "wifi internet conection"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:2760
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" start xwkoyhml
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:2896
    • 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:2880
  • C:\Windows\SysWOW64\xwkoyhml\ipwzocvf.exe
    C:\Windows\SysWOW64\xwkoyhml\ipwzocvf.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:2824
    • 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:2564

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    12.9MB

    MD5

    e8162d23e2c2202690ceb6f6e48a723e

    SHA1

    47e0da90ad99a4823fa5a800cad0e8661b19f2f5

    SHA256

    bf6a0847ba307d698a9655bb00b68923806dfc95497a9d14c2426902b973e461

    SHA512

    78e1330841312d920f1fa4bdea784a0d1b3c85068bf80aa2900d219a168aaa1ffc29cd9139f6174c31055dd1717ea84d679c684703399c293341e9135ad4c6fe

  • memory/1640-17-0x0000000000400000-0x0000000000415000-memory.dmp

    Filesize

    84KB

  • memory/1640-2-0x0000000000220000-0x0000000000233000-memory.dmp

    Filesize

    76KB

  • memory/1640-3-0x0000000000400000-0x0000000000415000-memory.dmp

    Filesize

    84KB

  • memory/1640-1-0x0000000002550000-0x0000000002650000-memory.dmp

    Filesize

    1024KB

  • memory/1640-14-0x0000000000400000-0x000000000247F000-memory.dmp

    Filesize

    32.5MB

  • memory/1640-15-0x0000000000220000-0x0000000000233000-memory.dmp

    Filesize

    76KB

  • memory/1640-16-0x0000000002550000-0x0000000002650000-memory.dmp

    Filesize

    1024KB

  • memory/2564-38-0x0000000000120000-0x0000000000130000-memory.dmp

    Filesize

    64KB

  • memory/2564-35-0x0000000000120000-0x0000000000130000-memory.dmp

    Filesize

    64KB

  • memory/2564-10-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

    Filesize

    4KB

  • memory/2564-18-0x0000000000080000-0x0000000000095000-memory.dmp

    Filesize

    84KB

  • memory/2564-11-0x0000000000080000-0x0000000000095000-memory.dmp

    Filesize

    84KB

  • memory/2564-19-0x0000000000080000-0x0000000000095000-memory.dmp

    Filesize

    84KB

  • memory/2564-21-0x0000000001930000-0x0000000001B3F000-memory.dmp

    Filesize

    2.1MB

  • memory/2564-28-0x0000000000120000-0x0000000000130000-memory.dmp

    Filesize

    64KB

  • memory/2564-25-0x0000000000110000-0x0000000000116000-memory.dmp

    Filesize

    24KB

  • memory/2564-24-0x0000000001930000-0x0000000001B3F000-memory.dmp

    Filesize

    2.1MB

  • memory/2564-40-0x0000000000120000-0x0000000000130000-memory.dmp

    Filesize

    64KB

  • memory/2564-39-0x0000000000120000-0x0000000000130000-memory.dmp

    Filesize

    64KB

  • memory/2564-8-0x0000000000080000-0x0000000000095000-memory.dmp

    Filesize

    84KB

  • memory/2564-37-0x0000000000120000-0x0000000000130000-memory.dmp

    Filesize

    64KB

  • memory/2564-36-0x0000000000120000-0x0000000000130000-memory.dmp

    Filesize

    64KB

  • memory/2564-56-0x0000000000240000-0x0000000000247000-memory.dmp

    Filesize

    28KB

  • memory/2564-34-0x0000000000120000-0x0000000000130000-memory.dmp

    Filesize

    64KB

  • memory/2564-33-0x0000000000120000-0x0000000000130000-memory.dmp

    Filesize

    64KB

  • memory/2564-32-0x0000000000120000-0x0000000000130000-memory.dmp

    Filesize

    64KB

  • memory/2564-31-0x0000000000120000-0x0000000000130000-memory.dmp

    Filesize

    64KB

  • memory/2564-52-0x0000000005450000-0x000000000585B000-memory.dmp

    Filesize

    4.0MB

  • memory/2564-55-0x0000000005450000-0x000000000585B000-memory.dmp

    Filesize

    4.0MB

  • memory/2564-51-0x00000000001F0000-0x00000000001F5000-memory.dmp

    Filesize

    20KB

  • memory/2564-48-0x00000000001F0000-0x00000000001F5000-memory.dmp

    Filesize

    20KB

  • memory/2564-47-0x0000000000120000-0x0000000000130000-memory.dmp

    Filesize

    64KB

  • memory/2564-46-0x0000000000120000-0x0000000000130000-memory.dmp

    Filesize

    64KB

  • memory/2564-45-0x0000000000120000-0x0000000000130000-memory.dmp

    Filesize

    64KB

  • memory/2564-44-0x0000000000120000-0x0000000000130000-memory.dmp

    Filesize

    64KB

  • memory/2564-43-0x0000000000120000-0x0000000000130000-memory.dmp

    Filesize

    64KB

  • memory/2564-42-0x0000000000120000-0x0000000000130000-memory.dmp

    Filesize

    64KB

  • memory/2564-41-0x0000000000120000-0x0000000000130000-memory.dmp

    Filesize

    64KB

  • memory/2824-13-0x0000000000400000-0x000000000247F000-memory.dmp

    Filesize

    32.5MB