Analysis

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

    arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
  • submitted
    05-09-2024 09:21

General

  • Target

    21a5e8cf356706a639eee50ea97cecef91685eb906921245c314ac50950b9825.exe

  • Size

    10.5MB

  • MD5

    274d0ab4368246be7f22990d9d5cb4cf

  • SHA1

    d34547e852863893aef034effc726bf2ee227d02

  • SHA256

    21a5e8cf356706a639eee50ea97cecef91685eb906921245c314ac50950b9825

  • SHA512

    dab676f30f08c6719e26cc376c89803a14d89adf50c6ee31d941f724b3dae03ca1cce950a3dd7651e3ed5f40323b021c875cdd1dfbbba9952cd417d7a3f90e81

  • SSDEEP

    6144:Sc6OZDisWsD0Td2HJxO+m8PuG1R4WnWjrsaz:S1OZDisvwdaxO0PuG1R4CWs

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\21a5e8cf356706a639eee50ea97cecef91685eb906921245c314ac50950b9825.exe
    "C:\Users\Admin\AppData\Local\Temp\21a5e8cf356706a639eee50ea97cecef91685eb906921245c314ac50950b9825.exe"
    1⤵
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:1928
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\belspmzt\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:1860
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\wdgbauuo.exe" C:\Windows\SysWOW64\belspmzt\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:1464
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" create belspmzt binPath= "C:\Windows\SysWOW64\belspmzt\wdgbauuo.exe /d\"C:\Users\Admin\AppData\Local\Temp\21a5e8cf356706a639eee50ea97cecef91685eb906921245c314ac50950b9825.exe\"" type= own start= auto DisplayName= "wifi support"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:1932
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" description belspmzt "wifi internet conection"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:2684
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" start belspmzt
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:2808
    • 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:2892
  • C:\Windows\SysWOW64\belspmzt\wdgbauuo.exe
    C:\Windows\SysWOW64\belspmzt\wdgbauuo.exe /d"C:\Users\Admin\AppData\Local\Temp\21a5e8cf356706a639eee50ea97cecef91685eb906921245c314ac50950b9825.exe"
    1⤵
    • Executes dropped EXE
    • Suspicious use of SetThreadContext
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2860
    • 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:2584

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    10.5MB

    MD5

    274d0ab4368246be7f22990d9d5cb4cf

    SHA1

    d34547e852863893aef034effc726bf2ee227d02

    SHA256

    21a5e8cf356706a639eee50ea97cecef91685eb906921245c314ac50950b9825

    SHA512

    dab676f30f08c6719e26cc376c89803a14d89adf50c6ee31d941f724b3dae03ca1cce950a3dd7651e3ed5f40323b021c875cdd1dfbbba9952cd417d7a3f90e81

  • memory/1928-17-0x0000000000400000-0x0000000000415000-memory.dmp

    Filesize

    84KB

  • memory/1928-2-0x0000000000220000-0x0000000000233000-memory.dmp

    Filesize

    76KB

  • memory/1928-3-0x0000000000400000-0x0000000000415000-memory.dmp

    Filesize

    84KB

  • memory/1928-1-0x00000000007B0000-0x00000000008B0000-memory.dmp

    Filesize

    1024KB

  • memory/1928-14-0x0000000000400000-0x00000000005FE000-memory.dmp

    Filesize

    2.0MB

  • memory/1928-15-0x0000000000220000-0x0000000000233000-memory.dmp

    Filesize

    76KB

  • memory/1928-16-0x00000000007B0000-0x00000000008B0000-memory.dmp

    Filesize

    1024KB

  • memory/2584-32-0x00000000000C0000-0x00000000000D0000-memory.dmp

    Filesize

    64KB

  • memory/2584-46-0x00000000000C0000-0x00000000000D0000-memory.dmp

    Filesize

    64KB

  • memory/2584-35-0x00000000000C0000-0x00000000000D0000-memory.dmp

    Filesize

    64KB

  • memory/2584-10-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

    Filesize

    4KB

  • memory/2584-18-0x0000000000080000-0x0000000000095000-memory.dmp

    Filesize

    84KB

  • memory/2584-19-0x0000000000080000-0x0000000000095000-memory.dmp

    Filesize

    84KB

  • memory/2584-24-0x0000000001950000-0x0000000001B5F000-memory.dmp

    Filesize

    2.1MB

  • memory/2584-25-0x00000000000A0000-0x00000000000A6000-memory.dmp

    Filesize

    24KB

  • memory/2584-21-0x0000000001950000-0x0000000001B5F000-memory.dmp

    Filesize

    2.1MB

  • memory/2584-28-0x00000000000C0000-0x00000000000D0000-memory.dmp

    Filesize

    64KB

  • memory/2584-34-0x00000000000C0000-0x00000000000D0000-memory.dmp

    Filesize

    64KB

  • memory/2584-33-0x00000000000C0000-0x00000000000D0000-memory.dmp

    Filesize

    64KB

  • memory/2584-11-0x0000000000080000-0x0000000000095000-memory.dmp

    Filesize

    84KB

  • memory/2584-31-0x00000000000C0000-0x00000000000D0000-memory.dmp

    Filesize

    64KB

  • memory/2584-55-0x0000000005520000-0x000000000592B000-memory.dmp

    Filesize

    4.0MB

  • memory/2584-8-0x0000000000080000-0x0000000000095000-memory.dmp

    Filesize

    84KB

  • memory/2584-52-0x0000000005520000-0x000000000592B000-memory.dmp

    Filesize

    4.0MB

  • memory/2584-56-0x0000000000140000-0x0000000000147000-memory.dmp

    Filesize

    28KB

  • memory/2584-51-0x00000000000D0000-0x00000000000D5000-memory.dmp

    Filesize

    20KB

  • memory/2584-48-0x00000000000D0000-0x00000000000D5000-memory.dmp

    Filesize

    20KB

  • memory/2584-47-0x00000000000C0000-0x00000000000D0000-memory.dmp

    Filesize

    64KB

  • memory/2584-45-0x00000000000C0000-0x00000000000D0000-memory.dmp

    Filesize

    64KB

  • memory/2584-44-0x00000000000C0000-0x00000000000D0000-memory.dmp

    Filesize

    64KB

  • memory/2584-43-0x00000000000C0000-0x00000000000D0000-memory.dmp

    Filesize

    64KB

  • memory/2584-42-0x00000000000C0000-0x00000000000D0000-memory.dmp

    Filesize

    64KB

  • memory/2584-41-0x00000000000C0000-0x00000000000D0000-memory.dmp

    Filesize

    64KB

  • memory/2584-40-0x00000000000C0000-0x00000000000D0000-memory.dmp

    Filesize

    64KB

  • memory/2584-39-0x00000000000C0000-0x00000000000D0000-memory.dmp

    Filesize

    64KB

  • memory/2584-38-0x00000000000C0000-0x00000000000D0000-memory.dmp

    Filesize

    64KB

  • memory/2584-37-0x00000000000C0000-0x00000000000D0000-memory.dmp

    Filesize

    64KB

  • memory/2584-36-0x00000000000C0000-0x00000000000D0000-memory.dmp

    Filesize

    64KB

  • memory/2860-12-0x0000000000400000-0x00000000005FE000-memory.dmp

    Filesize

    2.0MB