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Analysis

  • max time kernel
    147s
  • max time network
    147s
  • platform
    windows7_x64
  • resource
    win7-20240729-en
  • resource tags

    arch:x64arch:x86image:win7-20240729-enlocale:en-usos:windows7-x64system
  • submitted
    29/12/2024, 13:40

General

  • Target

    JaffaCakes118_1a3d452d707358e9968750470f83aac0128fb466b334ebdc715d1bcfa25049e2.exe

  • Size

    164KB

  • MD5

    109545ccd346a64438c76ad20826e428

  • SHA1

    b82cc2dd0a82359f66e70bdcdbb906fe977f2742

  • SHA256

    1a3d452d707358e9968750470f83aac0128fb466b334ebdc715d1bcfa25049e2

  • SHA512

    687069148861245b2facf2024036a881f3afc43e52b81419f0c7248288a1853106d67a1c5cd27017ad18cd0f4837216d61b49488eeaad843436940a130aad848

  • SSDEEP

    1536:dJI8UMLeRaE1C6XYLrh8PL7gzXZ87TQBpoC/o3jjIcUQRfr5AICRZShtDj46H9Dg:d1uZg7ZoCQ3jbBr5LQShtf4w7zS9H6l

Malware Config

Extracted

Family

tofsee

C2

defeatwax.ru

refabyd.info

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
  • 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.

  • Suspicious use of WriteProcessMemory 30 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_1a3d452d707358e9968750470f83aac0128fb466b334ebdc715d1bcfa25049e2.exe
    "C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_1a3d452d707358e9968750470f83aac0128fb466b334ebdc715d1bcfa25049e2.exe"
    1⤵
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2680
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\znnmddmt\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:2776
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\ykweepem.exe" C:\Windows\SysWOW64\znnmddmt\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:2400
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" create znnmddmt binPath= "C:\Windows\SysWOW64\znnmddmt\ykweepem.exe /d\"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_1a3d452d707358e9968750470f83aac0128fb466b334ebdc715d1bcfa25049e2.exe\"" type= own start= auto DisplayName= "wifi support"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:2736
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" description znnmddmt "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 znnmddmt
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:2572
    • 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:2404
  • C:\Windows\SysWOW64\znnmddmt\ykweepem.exe
    C:\Windows\SysWOW64\znnmddmt\ykweepem.exe /d"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_1a3d452d707358e9968750470f83aac0128fb466b334ebdc715d1bcfa25049e2.exe"
    1⤵
    • Executes dropped EXE
    • Suspicious use of SetThreadContext
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2616
    • C:\Windows\SysWOW64\svchost.exe
      svchost.exe
      2⤵
      • Windows security bypass
      • Sets service image path in registry
      • Deletes itself
      • System Location Discovery: System Language Discovery
      PID:2020

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    10.3MB

    MD5

    ff2c3116c4897e6ea2527f70dd16091a

    SHA1

    fb4c210aae3edc902283cbaa771771fb68ee6c25

    SHA256

    359b1f50e12910368eca38e90757eec3163a147d668bfe94936b657db68f1c11

    SHA512

    633b076078180044a7b3fc221323cfe02ed655df222af83b8e58a6a61514dba691e7bf9794d108658aca5d6802b600fda56fa4c890b692ffd111e8705915f3dc

  • memory/2020-11-0x0000000000100000-0x0000000000115000-memory.dmp

    Filesize

    84KB

  • memory/2020-18-0x0000000000100000-0x0000000000115000-memory.dmp

    Filesize

    84KB

  • memory/2020-17-0x0000000000100000-0x0000000000115000-memory.dmp

    Filesize

    84KB

  • memory/2020-13-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

    Filesize

    4KB

  • memory/2020-14-0x0000000000100000-0x0000000000115000-memory.dmp

    Filesize

    84KB

  • memory/2616-15-0x0000000000400000-0x00000000004AF000-memory.dmp

    Filesize

    700KB

  • memory/2680-9-0x0000000000220000-0x0000000000233000-memory.dmp

    Filesize

    76KB

  • memory/2680-10-0x0000000000400000-0x0000000000415000-memory.dmp

    Filesize

    84KB

  • memory/2680-1-0x00000000005A0000-0x00000000006A0000-memory.dmp

    Filesize

    1024KB

  • memory/2680-8-0x0000000000400000-0x00000000004AF000-memory.dmp

    Filesize

    700KB

  • memory/2680-4-0x0000000000400000-0x0000000000415000-memory.dmp

    Filesize

    84KB

  • memory/2680-2-0x0000000000220000-0x0000000000233000-memory.dmp

    Filesize

    76KB