Analysis

  • max time kernel
    113s
  • max time network
    126s
  • platform
    windows7_x64
  • resource
    win7-20240903-en
  • resource tags

    arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
  • submitted
    08/09/2024, 21:20

General

  • Target

    c9f9c516072359c5972d75337e89e790N.exe

  • Size

    422KB

  • MD5

    c9f9c516072359c5972d75337e89e790

  • SHA1

    00ac567dbe103901dc06e751802d937de1be9fff

  • SHA256

    49f08a77eedd5d5bf948d6c15688b04618296250793439928c9ba926bf758007

  • SHA512

    db56e058b456f85dcccf794d1cc9b0783b59f6f952e194aac013b4ad1b3d8116154d6be0b950a59a618bd30fd8ae0cd2b6f54e5e84628a4bf64f98106fbbc474

  • SSDEEP

    6144:4Cr9TDbMssgvbE5i8q2DNnWOFOMpoxAHg3s:4e9TDbxHba22F0xAHg

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 7 IoCs
  • Suspicious use of WriteProcessMemory 30 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\c9f9c516072359c5972d75337e89e790N.exe
    "C:\Users\Admin\AppData\Local\Temp\c9f9c516072359c5972d75337e89e790N.exe"
    1⤵
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2776
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\ldufspeb\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:2732
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\qtmxxghh.exe" C:\Windows\SysWOW64\ldufspeb\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:2944
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" create ldufspeb binPath= "C:\Windows\SysWOW64\ldufspeb\qtmxxghh.exe /d\"C:\Users\Admin\AppData\Local\Temp\c9f9c516072359c5972d75337e89e790N.exe\"" type= own start= auto DisplayName= "wifi support"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:2812
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" description ldufspeb "wifi internet conection"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:2768
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" start ldufspeb
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:2804
    • 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:2648
  • C:\Windows\SysWOW64\ldufspeb\qtmxxghh.exe
    C:\Windows\SysWOW64\ldufspeb\qtmxxghh.exe /d"C:\Users\Admin\AppData\Local\Temp\c9f9c516072359c5972d75337e89e790N.exe"
    1⤵
    • Executes dropped EXE
    • Suspicious use of SetThreadContext
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2600
    • 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:1960

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    12.4MB

    MD5

    742d0e401c2a6d7fff29294438a9e7e8

    SHA1

    06cde0a5060dfa500873b97db94a28de039c1917

    SHA256

    6e7c00939c1d4d698761284b876ed880495fe6d62622ba2becf26a619699843b

    SHA512

    c735136b2950fce865b4486147c039c8ed26843db2e0f71492ae57f5ab328766e9bf4702ca2f048ce20f78f3f4955dec1fb6ea9b15c29f9383f5dce63d0ce513

  • memory/1960-51-0x0000000005580000-0x000000000598B000-memory.dmp

    Filesize

    4.0MB

  • memory/1960-47-0x0000000000170000-0x0000000000175000-memory.dmp

    Filesize

    20KB

  • memory/1960-23-0x00000000018B0000-0x0000000001ABF000-memory.dmp

    Filesize

    2.1MB

  • memory/1960-30-0x0000000000120000-0x0000000000130000-memory.dmp

    Filesize

    64KB

  • memory/1960-31-0x0000000000120000-0x0000000000130000-memory.dmp

    Filesize

    64KB

  • memory/1960-46-0x0000000000120000-0x0000000000130000-memory.dmp

    Filesize

    64KB

  • memory/1960-13-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

    Filesize

    4KB

  • memory/1960-11-0x0000000000080000-0x0000000000095000-memory.dmp

    Filesize

    84KB

  • memory/1960-17-0x0000000000080000-0x0000000000095000-memory.dmp

    Filesize

    84KB

  • memory/1960-32-0x0000000000120000-0x0000000000130000-memory.dmp

    Filesize

    64KB

  • memory/1960-18-0x0000000000080000-0x0000000000095000-memory.dmp

    Filesize

    84KB

  • memory/1960-20-0x00000000018B0000-0x0000000001ABF000-memory.dmp

    Filesize

    2.1MB

  • memory/1960-24-0x0000000000110000-0x0000000000116000-memory.dmp

    Filesize

    24KB

  • memory/1960-27-0x0000000000120000-0x0000000000130000-memory.dmp

    Filesize

    64KB

  • memory/1960-39-0x0000000000120000-0x0000000000130000-memory.dmp

    Filesize

    64KB

  • memory/1960-55-0x0000000000180000-0x0000000000187000-memory.dmp

    Filesize

    28KB

  • memory/1960-54-0x0000000005580000-0x000000000598B000-memory.dmp

    Filesize

    4.0MB

  • memory/1960-33-0x0000000000120000-0x0000000000130000-memory.dmp

    Filesize

    64KB

  • memory/1960-34-0x0000000000120000-0x0000000000130000-memory.dmp

    Filesize

    64KB

  • memory/1960-50-0x0000000000170000-0x0000000000175000-memory.dmp

    Filesize

    20KB

  • memory/1960-14-0x0000000000080000-0x0000000000095000-memory.dmp

    Filesize

    84KB

  • memory/1960-45-0x0000000000120000-0x0000000000130000-memory.dmp

    Filesize

    64KB

  • memory/1960-44-0x0000000000120000-0x0000000000130000-memory.dmp

    Filesize

    64KB

  • memory/1960-43-0x0000000000120000-0x0000000000130000-memory.dmp

    Filesize

    64KB

  • memory/1960-42-0x0000000000120000-0x0000000000130000-memory.dmp

    Filesize

    64KB

  • memory/1960-41-0x0000000000120000-0x0000000000130000-memory.dmp

    Filesize

    64KB

  • memory/1960-40-0x0000000000120000-0x0000000000130000-memory.dmp

    Filesize

    64KB

  • memory/1960-38-0x0000000000120000-0x0000000000130000-memory.dmp

    Filesize

    64KB

  • memory/1960-37-0x0000000000120000-0x0000000000130000-memory.dmp

    Filesize

    64KB

  • memory/1960-36-0x0000000000120000-0x0000000000130000-memory.dmp

    Filesize

    64KB

  • memory/1960-35-0x0000000000120000-0x0000000000130000-memory.dmp

    Filesize

    64KB

  • memory/2600-15-0x0000000000400000-0x00000000005FE000-memory.dmp

    Filesize

    2.0MB

  • memory/2776-1-0x0000000000680000-0x0000000000780000-memory.dmp

    Filesize

    1024KB

  • memory/2776-4-0x0000000000400000-0x00000000005FE000-memory.dmp

    Filesize

    2.0MB

  • memory/2776-9-0x0000000000400000-0x0000000000415000-memory.dmp

    Filesize

    84KB

  • memory/2776-8-0x0000000000400000-0x00000000005FE000-memory.dmp

    Filesize

    2.0MB

  • memory/2776-2-0x0000000000400000-0x0000000000415000-memory.dmp

    Filesize

    84KB