Analysis

  • max time kernel
    144s
  • max time network
    145s
  • platform
    windows7_x64
  • resource
    win7-20240705-en
  • resource tags

    arch:x64arch:x86image:win7-20240705-enlocale:en-usos:windows7-x64system
  • submitted
    31-08-2024 08:40

General

  • Target

    181e6f88cf32348d8247bb3c4deb07bf44b677656b43b37a30dfad4a3b3e2935.exe

  • Size

    12.1MB

  • MD5

    0906ff34f48334d4563ca2df39b3cef7

  • SHA1

    289a0a4287b6e42e680a9b7efa0585fd97708f2e

  • SHA256

    181e6f88cf32348d8247bb3c4deb07bf44b677656b43b37a30dfad4a3b3e2935

  • SHA512

    41545edf3fc63015f8bf2d094de7c17688889fbf4956fadd0b2447da2a870967606ad06971b3db4f28de7e8c777a1dcfec67bb8a99454d1598f1a42bb20580f6

  • SSDEEP

    196608:gXPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPP/:g

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\181e6f88cf32348d8247bb3c4deb07bf44b677656b43b37a30dfad4a3b3e2935.exe
    "C:\Users\Admin\AppData\Local\Temp\181e6f88cf32348d8247bb3c4deb07bf44b677656b43b37a30dfad4a3b3e2935.exe"
    1⤵
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2172
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\cnvjmpsr\
      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\lseranoi.exe" C:\Windows\SysWOW64\cnvjmpsr\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:2780
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" create cnvjmpsr binPath= "C:\Windows\SysWOW64\cnvjmpsr\lseranoi.exe /d\"C:\Users\Admin\AppData\Local\Temp\181e6f88cf32348d8247bb3c4deb07bf44b677656b43b37a30dfad4a3b3e2935.exe\"" type= own start= auto DisplayName= "wifi support"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:2228
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" description cnvjmpsr "wifi internet conection"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:1624
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" start cnvjmpsr
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:2720
    • 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:2660
  • C:\Windows\SysWOW64\cnvjmpsr\lseranoi.exe
    C:\Windows\SysWOW64\cnvjmpsr\lseranoi.exe /d"C:\Users\Admin\AppData\Local\Temp\181e6f88cf32348d8247bb3c4deb07bf44b677656b43b37a30dfad4a3b3e2935.exe"
    1⤵
    • Executes dropped EXE
    • Suspicious use of SetThreadContext
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2844
    • 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:2184

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    13.1MB

    MD5

    de16e0bff0aa81cfd8dbca0b9d329432

    SHA1

    2e27d4e888a9cd9dc4ecad703c256dd9ae4dc44a

    SHA256

    176310b6b7c0e40e458221af42a3b6c88a1090810088a5c074f51445025a9f38

    SHA512

    c04e2758150c0450f5e74a63e49f051c3fb43f8df81074610320261f1191c11e0903e8ea91a1ebd8afbeaf95af1ce471caed420e6fa429512fa1d90d7c5a8218

  • memory/2172-9-0x0000000000020000-0x0000000000033000-memory.dmp

    Filesize

    76KB

  • memory/2172-3-0x0000000000400000-0x0000000000415000-memory.dmp

    Filesize

    84KB

  • memory/2172-1-0x00000000009D0000-0x0000000000AD0000-memory.dmp

    Filesize

    1024KB

  • memory/2172-8-0x0000000000400000-0x0000000000871000-memory.dmp

    Filesize

    4.4MB

  • memory/2172-10-0x0000000000400000-0x0000000000415000-memory.dmp

    Filesize

    84KB

  • memory/2172-2-0x0000000000020000-0x0000000000033000-memory.dmp

    Filesize

    76KB

  • memory/2184-13-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

    Filesize

    4KB

  • memory/2184-11-0x00000000000C0000-0x00000000000D5000-memory.dmp

    Filesize

    84KB

  • memory/2184-14-0x00000000000C0000-0x00000000000D5000-memory.dmp

    Filesize

    84KB

  • memory/2184-16-0x00000000000C0000-0x00000000000D5000-memory.dmp

    Filesize

    84KB

  • memory/2184-18-0x00000000000C0000-0x00000000000D5000-memory.dmp

    Filesize

    84KB

  • memory/2844-17-0x0000000000400000-0x0000000000871000-memory.dmp

    Filesize

    4.4MB