Analysis

  • max time kernel
    145s
  • max time network
    145s
  • platform
    windows7_x64
  • resource
    win7-20240729-en
  • resource tags

    arch:x64arch:x86image:win7-20240729-enlocale:en-usos:windows7-x64system
  • submitted
    01-09-2024 16:40

General

  • Target

    f365d1d600ccc20bde31b7db1fd7a815b73087c9e46676e0d398289af7b7bb71.exe

  • Size

    11.7MB

  • MD5

    b8332866db45bf85ed517c599eaafe54

  • SHA1

    f86726a6a85f613e15066a7ad77cef942e3c9d28

  • SHA256

    f365d1d600ccc20bde31b7db1fd7a815b73087c9e46676e0d398289af7b7bb71

  • SHA512

    b95ac93c7487fada804562e98f8e5db4902ab3195236c71cfa171732071d4601ce479b6eed519f61a0724a47d6cda7f9d397285c265b2c9bfb7d143ba8ef1425

  • SSDEEP

    3072:qoiqjV0QCeV75zMwb2EfDXTBrt0c5f+Z7ApWt+0krytpObPUfAGM4H1M4CjiJNx4:qoiqjWHeV9zthDjBrmA+VkDbSAgQiTx

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\f365d1d600ccc20bde31b7db1fd7a815b73087c9e46676e0d398289af7b7bb71.exe
    "C:\Users\Admin\AppData\Local\Temp\f365d1d600ccc20bde31b7db1fd7a815b73087c9e46676e0d398289af7b7bb71.exe"
    1⤵
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2052
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\imksiiw\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:2340
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\amyggrgo.exe" C:\Windows\SysWOW64\imksiiw\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:2452
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" create imksiiw binPath= "C:\Windows\SysWOW64\imksiiw\amyggrgo.exe /d\"C:\Users\Admin\AppData\Local\Temp\f365d1d600ccc20bde31b7db1fd7a815b73087c9e46676e0d398289af7b7bb71.exe\"" type= own start= auto DisplayName= "wifi support"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:2900
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" description imksiiw "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 imksiiw
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:2652
    • 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:2672
  • C:\Windows\SysWOW64\imksiiw\amyggrgo.exe
    C:\Windows\SysWOW64\imksiiw\amyggrgo.exe /d"C:\Users\Admin\AppData\Local\Temp\f365d1d600ccc20bde31b7db1fd7a815b73087c9e46676e0d398289af7b7bb71.exe"
    1⤵
    • Executes dropped EXE
    • Suspicious use of SetThreadContext
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2760
    • 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:2700

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    10.5MB

    MD5

    215965cb981c127bfd2d04fc84ce6b81

    SHA1

    f69b684f41efe7a2a381cbfc9977a6c201de7bc1

    SHA256

    2efbd3ac6d9e52792753f73d3a6c612a7c9660eae68595715bdf2815cdc667f8

    SHA512

    67346dee80d532fd6270c3bfe5de9a0d73314c04c3dccfbade6795f5956d4ccc4035a61d3591cd1ac325556f7745bd09dcdc74dcb88f78bc34532713b328c25a

  • memory/2052-9-0x0000000000020000-0x0000000000033000-memory.dmp

    Filesize

    76KB

  • memory/2052-3-0x0000000000400000-0x0000000000415000-memory.dmp

    Filesize

    84KB

  • memory/2052-1-0x0000000000A00000-0x0000000000B00000-memory.dmp

    Filesize

    1024KB

  • memory/2052-8-0x0000000000400000-0x000000000086B000-memory.dmp

    Filesize

    4.4MB

  • memory/2052-10-0x0000000000400000-0x0000000000415000-memory.dmp

    Filesize

    84KB

  • memory/2052-2-0x0000000000020000-0x0000000000033000-memory.dmp

    Filesize

    76KB

  • memory/2700-14-0x00000000000D0000-0x00000000000E5000-memory.dmp

    Filesize

    84KB

  • memory/2700-13-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

    Filesize

    4KB

  • memory/2700-12-0x00000000000D0000-0x00000000000E5000-memory.dmp

    Filesize

    84KB

  • memory/2700-16-0x00000000000D0000-0x00000000000E5000-memory.dmp

    Filesize

    84KB

  • memory/2700-17-0x00000000000D0000-0x00000000000E5000-memory.dmp

    Filesize

    84KB

  • memory/2700-18-0x00000000000D0000-0x00000000000E5000-memory.dmp

    Filesize

    84KB

  • memory/2760-15-0x0000000000400000-0x000000000086B000-memory.dmp

    Filesize

    4.4MB