Analysis

  • max time kernel
    141s
  • max time network
    142s
  • platform
    windows7_x64
  • resource
    win7-20241023-en
  • resource tags

    arch:x64arch:x86image:win7-20241023-enlocale:en-usos:windows7-x64system
  • submitted
    23-12-2024 17:27

General

  • Target

    JaffaCakes118_a86039fde97daa1ebcf8db274c8b69a11816b0501ed9c2bd6f62129699a8ed6e.exe

  • Size

    230KB

  • MD5

    7156f5214b95b9cab786bdc25795be32

  • SHA1

    3e5ee01b532afe82ef450e112bde62b810e960eb

  • SHA256

    a86039fde97daa1ebcf8db274c8b69a11816b0501ed9c2bd6f62129699a8ed6e

  • SHA512

    e9b11fc5fba094788e3522eec19e463b322667be266f2ec80e62ecc9d609c44e0d176c7e374007031a332655cdf15cc53816937ee1fba1f7feb7100fb6375132

  • SSDEEP

    3072:mn1SU4bmqNsRjk97DovNEIY66YYfkuf5aGov:sAmqNsRA9/wNEIcxkKwG8

Malware Config

Extracted

Family

tofsee

C2

niflheimr.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\JaffaCakes118_a86039fde97daa1ebcf8db274c8b69a11816b0501ed9c2bd6f62129699a8ed6e.exe
    "C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_a86039fde97daa1ebcf8db274c8b69a11816b0501ed9c2bd6f62129699a8ed6e.exe"
    1⤵
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2100
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\eftkxzpa\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:2632
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\hvpzjxig.exe" C:\Windows\SysWOW64\eftkxzpa\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:2764
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" create eftkxzpa binPath= "C:\Windows\SysWOW64\eftkxzpa\hvpzjxig.exe /d\"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_a86039fde97daa1ebcf8db274c8b69a11816b0501ed9c2bd6f62129699a8ed6e.exe\"" type= own start= auto DisplayName= "wifi support"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:2628
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" description eftkxzpa "wifi internet conection"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:2640
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" start eftkxzpa
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:2716
    • 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:2688
  • C:\Windows\SysWOW64\eftkxzpa\hvpzjxig.exe
    C:\Windows\SysWOW64\eftkxzpa\hvpzjxig.exe /d"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_a86039fde97daa1ebcf8db274c8b69a11816b0501ed9c2bd6f62129699a8ed6e.exe"
    1⤵
    • Executes dropped EXE
    • Suspicious use of SetThreadContext
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2560
    • 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:2976

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    13.9MB

    MD5

    55a7913e3124d154549e9e40644d1f96

    SHA1

    9fc6560b624c9b246e41e400a89ac8663b75e8db

    SHA256

    1ca7a450e5481400f709301bf3a963dfe99efcd271ec387e5e4e5e209fd0c8cd

    SHA512

    3f34a5ad1a2cd0eaf0f48159cee1045a74fca0e4763770dbf9dd7eab17195e499deebb9edd3ad9ab9bc9677833607b637cb47ba6b4a864016040316e482f85fe

  • memory/2100-3-0x0000000000400000-0x0000000000444000-memory.dmp

    Filesize

    272KB

  • memory/2100-2-0x0000000000400000-0x0000000000415000-memory.dmp

    Filesize

    84KB

  • memory/2100-9-0x0000000000400000-0x0000000000415000-memory.dmp

    Filesize

    84KB

  • memory/2100-8-0x0000000000400000-0x0000000000444000-memory.dmp

    Filesize

    272KB

  • memory/2100-1-0x0000000000530000-0x0000000000630000-memory.dmp

    Filesize

    1024KB

  • memory/2560-16-0x0000000000400000-0x0000000000444000-memory.dmp

    Filesize

    272KB

  • memory/2976-46-0x00000000001C0000-0x00000000001D0000-memory.dmp

    Filesize

    64KB

  • memory/2976-42-0x00000000001C0000-0x00000000001D0000-memory.dmp

    Filesize

    64KB

  • memory/2976-17-0x0000000000080000-0x0000000000095000-memory.dmp

    Filesize

    84KB

  • memory/2976-13-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

    Filesize

    4KB

  • memory/2976-18-0x0000000000080000-0x0000000000095000-memory.dmp

    Filesize

    84KB

  • memory/2976-23-0x0000000001C10000-0x0000000001E1F000-memory.dmp

    Filesize

    2.1MB

  • memory/2976-39-0x00000000001C0000-0x00000000001D0000-memory.dmp

    Filesize

    64KB

  • memory/2976-54-0x00000000058A0000-0x0000000005CAB000-memory.dmp

    Filesize

    4.0MB

  • memory/2976-51-0x00000000058A0000-0x0000000005CAB000-memory.dmp

    Filesize

    4.0MB

  • memory/2976-50-0x00000000001D0000-0x00000000001D5000-memory.dmp

    Filesize

    20KB

  • memory/2976-47-0x00000000001D0000-0x00000000001D5000-memory.dmp

    Filesize

    20KB

  • memory/2976-11-0x0000000000080000-0x0000000000095000-memory.dmp

    Filesize

    84KB

  • memory/2976-45-0x00000000001C0000-0x00000000001D0000-memory.dmp

    Filesize

    64KB

  • memory/2976-44-0x00000000001C0000-0x00000000001D0000-memory.dmp

    Filesize

    64KB

  • memory/2976-43-0x00000000001C0000-0x00000000001D0000-memory.dmp

    Filesize

    64KB

  • memory/2976-14-0x0000000000080000-0x0000000000095000-memory.dmp

    Filesize

    84KB

  • memory/2976-41-0x00000000001C0000-0x00000000001D0000-memory.dmp

    Filesize

    64KB

  • memory/2976-40-0x00000000001C0000-0x00000000001D0000-memory.dmp

    Filesize

    64KB

  • memory/2976-38-0x00000000001C0000-0x00000000001D0000-memory.dmp

    Filesize

    64KB

  • memory/2976-37-0x00000000001C0000-0x00000000001D0000-memory.dmp

    Filesize

    64KB

  • memory/2976-36-0x00000000001C0000-0x00000000001D0000-memory.dmp

    Filesize

    64KB

  • memory/2976-35-0x00000000001C0000-0x00000000001D0000-memory.dmp

    Filesize

    64KB

  • memory/2976-34-0x00000000001C0000-0x00000000001D0000-memory.dmp

    Filesize

    64KB

  • memory/2976-33-0x00000000001C0000-0x00000000001D0000-memory.dmp

    Filesize

    64KB

  • memory/2976-32-0x00000000001C0000-0x00000000001D0000-memory.dmp

    Filesize

    64KB

  • memory/2976-31-0x00000000001C0000-0x00000000001D0000-memory.dmp

    Filesize

    64KB

  • memory/2976-30-0x00000000001C0000-0x00000000001D0000-memory.dmp

    Filesize

    64KB

  • memory/2976-27-0x00000000001C0000-0x00000000001D0000-memory.dmp

    Filesize

    64KB

  • memory/2976-55-0x00000000003B0000-0x00000000003B7000-memory.dmp

    Filesize

    28KB

  • memory/2976-24-0x00000000001B0000-0x00000000001B6000-memory.dmp

    Filesize

    24KB

  • memory/2976-20-0x0000000001C10000-0x0000000001E1F000-memory.dmp

    Filesize

    2.1MB