Analysis

  • max time kernel
    146s
  • max time network
    146s
  • platform
    windows7_x64
  • resource
    win7-20240729-en
  • resource tags

    arch:x64arch:x86image:win7-20240729-enlocale:en-usos:windows7-x64system
  • submitted
    31-08-2024 08:22

General

  • Target

    2668ea58977d5457c1bcb28d04d1b55692fc7d6a64bfc3413a2cede20e838cf4.exe

  • Size

    13.5MB

  • MD5

    feb515efe8237480211f2fabe3976bdf

  • SHA1

    d30c04512b4e2a34f1825b1fb8742be1d004cbc0

  • SHA256

    2668ea58977d5457c1bcb28d04d1b55692fc7d6a64bfc3413a2cede20e838cf4

  • SHA512

    a3eedc03386d4732ccd22bcaf04a4470bd711cbb3511390abe10394a4fbf5e1309adf549005816784a7e54ec1eb2f2bcdba1121bbe4bbd8460193fa3d70b9a8d

  • SSDEEP

    196608:r+TTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTn:r

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.

  • 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\2668ea58977d5457c1bcb28d04d1b55692fc7d6a64bfc3413a2cede20e838cf4.exe
    "C:\Users\Admin\AppData\Local\Temp\2668ea58977d5457c1bcb28d04d1b55692fc7d6a64bfc3413a2cede20e838cf4.exe"
    1⤵
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2604
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\xuzdyhvt\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:2952
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\ydzrpse.exe" C:\Windows\SysWOW64\xuzdyhvt\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:2808
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" create xuzdyhvt binPath= "C:\Windows\SysWOW64\xuzdyhvt\ydzrpse.exe /d\"C:\Users\Admin\AppData\Local\Temp\2668ea58977d5457c1bcb28d04d1b55692fc7d6a64bfc3413a2cede20e838cf4.exe\"" type= own start= auto DisplayName= "wifi support"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:2924
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" description xuzdyhvt "wifi internet conection"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:2472
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" start xuzdyhvt
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:2668
    • 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:2880
  • C:\Windows\SysWOW64\xuzdyhvt\ydzrpse.exe
    C:\Windows\SysWOW64\xuzdyhvt\ydzrpse.exe /d"C:\Users\Admin\AppData\Local\Temp\2668ea58977d5457c1bcb28d04d1b55692fc7d6a64bfc3413a2cede20e838cf4.exe"
    1⤵
    • Executes dropped EXE
    • Suspicious use of SetThreadContext
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2776
    • 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:2664

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads

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

    Filesize

    14.8MB

    MD5

    c5b0bd41fe5612bc0dd5602003588c4b

    SHA1

    b1529fa2f47ddc828e32888040082db1502272d2

    SHA256

    06efd43ec9921211b8b01cf3daa5bb1af3f8505f91ebef24bceb02c32ea35d78

    SHA512

    6dcded491c4e84e1c48f694cb6da59f3e674c9185da803702e178d4090993ff72a6b2eee5625f9e08cf55376822d4ba79433f8a21e64f169779e0548dd8ef4f2

  • memory/2604-1-0x0000000000950000-0x0000000000A50000-memory.dmp

    Filesize

    1024KB

  • memory/2604-4-0x0000000000400000-0x0000000000870000-memory.dmp

    Filesize

    4.4MB

  • memory/2604-3-0x0000000000400000-0x0000000000415000-memory.dmp

    Filesize

    84KB

  • memory/2604-10-0x0000000000400000-0x0000000000415000-memory.dmp

    Filesize

    84KB

  • memory/2604-9-0x0000000000400000-0x0000000000870000-memory.dmp

    Filesize

    4.4MB

  • memory/2664-14-0x0000000000080000-0x0000000000095000-memory.dmp

    Filesize

    84KB

  • memory/2664-13-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

    Filesize

    4KB

  • memory/2664-11-0x0000000000080000-0x0000000000095000-memory.dmp

    Filesize

    84KB

  • memory/2664-17-0x0000000000080000-0x0000000000095000-memory.dmp

    Filesize

    84KB

  • memory/2664-18-0x0000000000080000-0x0000000000095000-memory.dmp

    Filesize

    84KB

  • memory/2776-16-0x0000000000400000-0x0000000000870000-memory.dmp

    Filesize

    4.4MB