Analysis

  • max time kernel
    147s
  • max time network
    149s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240802-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
  • submitted
    04-09-2024 06:43

General

  • Target

    2cccbfbe95b716e6f8b5ed1634b9ae4e6ab87e1355804ca5aea8d353673ff6a2.exe

  • Size

    423KB

  • MD5

    b2e864c2f8f6e243822a5c133bb41061

  • SHA1

    5571df4cdc5b65cdc315c95ee52344dda7f12b20

  • SHA256

    2cccbfbe95b716e6f8b5ed1634b9ae4e6ab87e1355804ca5aea8d353673ff6a2

  • SHA512

    32a6087702abe92daab3e2c194b07006f5b9d3cdf48c692d23775f0d75e2941882920767148564ac7fedc417beadb1ae75734f240d07bec30eb262ae4f534e73

  • SSDEEP

    6144:qc6OZDisWsD0Td2HJxO+m8PuG1R4WnWjrsaz:q1OZDisvwdaxO0PuG1R4CWs

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.

  • Creates new service(s) 2 TTPs
  • Modifies Windows Firewall 2 TTPs 1 IoCs
  • Sets service image path in registry 2 TTPs 1 IoCs
  • Checks computer location settings 2 TTPs 1 IoCs

    Looks up country code configured in the registry, likely geofence.

  • 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 23 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\2cccbfbe95b716e6f8b5ed1634b9ae4e6ab87e1355804ca5aea8d353673ff6a2.exe
    "C:\Users\Admin\AppData\Local\Temp\2cccbfbe95b716e6f8b5ed1634b9ae4e6ab87e1355804ca5aea8d353673ff6a2.exe"
    1⤵
    • Checks computer location settings
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:4596
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\hdhadioz\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:1896
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\cjivddlp.exe" C:\Windows\SysWOW64\hdhadioz\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:4716
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" create hdhadioz binPath= "C:\Windows\SysWOW64\hdhadioz\cjivddlp.exe /d\"C:\Users\Admin\AppData\Local\Temp\2cccbfbe95b716e6f8b5ed1634b9ae4e6ab87e1355804ca5aea8d353673ff6a2.exe\"" type= own start= auto DisplayName= "wifi support"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:2144
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" description hdhadioz "wifi internet conection"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:3192
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" start hdhadioz
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:3060
    • 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:964
  • C:\Windows\SysWOW64\hdhadioz\cjivddlp.exe
    C:\Windows\SysWOW64\hdhadioz\cjivddlp.exe /d"C:\Users\Admin\AppData\Local\Temp\2cccbfbe95b716e6f8b5ed1634b9ae4e6ab87e1355804ca5aea8d353673ff6a2.exe"
    1⤵
    • Executes dropped EXE
    • Suspicious use of SetThreadContext
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:852
    • C:\Windows\SysWOW64\svchost.exe
      svchost.exe
      2⤵
      • 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:1528

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    14.7MB

    MD5

    bbb51d69c51304fcf76cf8bae4a52ea8

    SHA1

    3c2b49a34908d1d64d01af157e1901dfc063e5f8

    SHA256

    3805b686f31987e6369aa344fd41f9cfa965bd510a2283246304a5abf19c9275

    SHA512

    3d4017a8de9c0479fc28f14424de0ad4b927379eb97b11263b06291292d1d9d6176ab4310d631606f190fca130fbb7c455377288862046ae9600a5fe9cfdecf0

  • memory/852-11-0x0000000000400000-0x00000000005FE000-memory.dmp

    Filesize

    2.0MB

  • memory/852-16-0x0000000000400000-0x00000000005FE000-memory.dmp

    Filesize

    2.0MB

  • memory/852-12-0x0000000000400000-0x00000000005FE000-memory.dmp

    Filesize

    2.0MB

  • memory/1528-46-0x00000000023B0000-0x00000000023C0000-memory.dmp

    Filesize

    64KB

  • memory/1528-43-0x00000000023B0000-0x00000000023C0000-memory.dmp

    Filesize

    64KB

  • memory/1528-24-0x0000000000FF0000-0x0000000000FF6000-memory.dmp

    Filesize

    24KB

  • memory/1528-27-0x00000000023B0000-0x00000000023C0000-memory.dmp

    Filesize

    64KB

  • memory/1528-21-0x0000000002C00000-0x0000000002E0F000-memory.dmp

    Filesize

    2.1MB

  • memory/1528-13-0x0000000000EE0000-0x0000000000EF5000-memory.dmp

    Filesize

    84KB

  • memory/1528-17-0x0000000000EE0000-0x0000000000EF5000-memory.dmp

    Filesize

    84KB

  • memory/1528-55-0x0000000002FE0000-0x0000000002FE7000-memory.dmp

    Filesize

    28KB

  • memory/1528-18-0x0000000000EE0000-0x0000000000EF5000-memory.dmp

    Filesize

    84KB

  • memory/1528-23-0x0000000002C00000-0x0000000002E0F000-memory.dmp

    Filesize

    2.1MB

  • memory/1528-51-0x0000000007B00000-0x0000000007F0B000-memory.dmp

    Filesize

    4.0MB

  • memory/1528-54-0x0000000007B00000-0x0000000007F0B000-memory.dmp

    Filesize

    4.0MB

  • memory/1528-50-0x0000000002FD0000-0x0000000002FD5000-memory.dmp

    Filesize

    20KB

  • memory/1528-47-0x0000000002FD0000-0x0000000002FD5000-memory.dmp

    Filesize

    20KB

  • memory/1528-30-0x00000000023B0000-0x00000000023C0000-memory.dmp

    Filesize

    64KB

  • memory/1528-45-0x00000000023B0000-0x00000000023C0000-memory.dmp

    Filesize

    64KB

  • memory/1528-44-0x00000000023B0000-0x00000000023C0000-memory.dmp

    Filesize

    64KB

  • memory/1528-31-0x00000000023B0000-0x00000000023C0000-memory.dmp

    Filesize

    64KB

  • memory/1528-42-0x00000000023B0000-0x00000000023C0000-memory.dmp

    Filesize

    64KB

  • memory/1528-41-0x00000000023B0000-0x00000000023C0000-memory.dmp

    Filesize

    64KB

  • memory/1528-40-0x00000000023B0000-0x00000000023C0000-memory.dmp

    Filesize

    64KB

  • memory/1528-39-0x00000000023B0000-0x00000000023C0000-memory.dmp

    Filesize

    64KB

  • memory/1528-38-0x00000000023B0000-0x00000000023C0000-memory.dmp

    Filesize

    64KB

  • memory/1528-37-0x00000000023B0000-0x00000000023C0000-memory.dmp

    Filesize

    64KB

  • memory/1528-36-0x00000000023B0000-0x00000000023C0000-memory.dmp

    Filesize

    64KB

  • memory/1528-35-0x00000000023B0000-0x00000000023C0000-memory.dmp

    Filesize

    64KB

  • memory/1528-34-0x00000000023B0000-0x00000000023C0000-memory.dmp

    Filesize

    64KB

  • memory/1528-33-0x00000000023B0000-0x00000000023C0000-memory.dmp

    Filesize

    64KB

  • memory/1528-32-0x00000000023B0000-0x00000000023C0000-memory.dmp

    Filesize

    64KB

  • memory/4596-8-0x0000000002350000-0x0000000002363000-memory.dmp

    Filesize

    76KB

  • memory/4596-1-0x0000000000770000-0x0000000000870000-memory.dmp

    Filesize

    1024KB

  • memory/4596-2-0x0000000002350000-0x0000000002363000-memory.dmp

    Filesize

    76KB

  • memory/4596-3-0x0000000000400000-0x0000000000415000-memory.dmp

    Filesize

    84KB

  • memory/4596-9-0x0000000000400000-0x0000000000415000-memory.dmp

    Filesize

    84KB

  • memory/4596-7-0x0000000000400000-0x00000000005FE000-memory.dmp

    Filesize

    2.0MB