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Analysis

  • max time kernel
    144s
  • max time network
    144s
  • platform
    windows7_x64
  • resource
    win7-20240903-en
  • resource tags

    arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
  • submitted
    28/01/2025, 05:53

General

  • Target

    2f9c9ce20410a27d2b9c6b75821899812daf14d07aa20b877c661cee71beb749.exe

  • Size

    14.1MB

  • MD5

    a707de5d5c4e2813b31ab8cfa03e2b09

  • SHA1

    56f59963bde1d6f1ea8f3f1349f1b4855728c1c0

  • SHA256

    2f9c9ce20410a27d2b9c6b75821899812daf14d07aa20b877c661cee71beb749

  • SHA512

    2c5eb637d20c92f02621b2e16dd15fa38db91467a1a76cf381ff04ef6bd05a41931dac298cb92b5e7eefb453f6ded8a5d363082cb8ba5e57adffbcdc4bc40860

  • SSDEEP

    3072:aMFPx8ZeNPqKsjN2VqfrHJpx5uXvw9oXU6L3w4WtWtWtWtWtWtWtWtWtWtWtWtWw:a06ZeNi5jNAqjHJpx5OI9oXjL

Malware Config

Extracted

Family

tofsee

C2

vanaheim.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
  • 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\2f9c9ce20410a27d2b9c6b75821899812daf14d07aa20b877c661cee71beb749.exe
    "C:\Users\Admin\AppData\Local\Temp\2f9c9ce20410a27d2b9c6b75821899812daf14d07aa20b877c661cee71beb749.exe"
    1⤵
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2008
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\ozbapzcl\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:2528
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\ugolreki.exe" C:\Windows\SysWOW64\ozbapzcl\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:1496
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" create ozbapzcl binPath= "C:\Windows\SysWOW64\ozbapzcl\ugolreki.exe /d\"C:\Users\Admin\AppData\Local\Temp\2f9c9ce20410a27d2b9c6b75821899812daf14d07aa20b877c661cee71beb749.exe\"" type= own start= auto DisplayName= "wifi support"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:2348
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" description ozbapzcl "wifi internet conection"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:2764
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" start ozbapzcl
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:2876
    • 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:2656
  • C:\Windows\SysWOW64\ozbapzcl\ugolreki.exe
    C:\Windows\SysWOW64\ozbapzcl\ugolreki.exe /d"C:\Users\Admin\AppData\Local\Temp\2f9c9ce20410a27d2b9c6b75821899812daf14d07aa20b877c661cee71beb749.exe"
    1⤵
    • Executes dropped EXE
    • Suspicious use of SetThreadContext
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2860
    • 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:2848

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    12.8MB

    MD5

    dc4f2969a6564ed4a24adb9279837aa0

    SHA1

    8b696225e36cfae213b79fd1569f8fcccccd7698

    SHA256

    ffbe0b952347ce7ecc57e476c1df4b57bebb3809ee29577d46819e0e04195150

    SHA512

    49384be8807dcdc873ee3086dd31694e4c1d3b3109fb58f662a6e2f4860bfe80291c092d6b615a118e9d2c873f660cabfc113bf67e41f8383a33d2e1f2cfe0b1

  • memory/2008-15-0x0000000000240000-0x0000000000253000-memory.dmp

    Filesize

    76KB

  • memory/2008-3-0x0000000000400000-0x0000000000415000-memory.dmp

    Filesize

    84KB

  • memory/2008-2-0x0000000000240000-0x0000000000253000-memory.dmp

    Filesize

    76KB

  • memory/2008-16-0x0000000000400000-0x0000000000415000-memory.dmp

    Filesize

    84KB

  • memory/2008-1-0x0000000000840000-0x0000000000940000-memory.dmp

    Filesize

    1024KB

  • memory/2008-14-0x0000000000400000-0x000000000070E000-memory.dmp

    Filesize

    3.1MB

  • memory/2848-11-0x00000000000E0000-0x00000000000F5000-memory.dmp

    Filesize

    84KB

  • memory/2848-10-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

    Filesize

    4KB

  • memory/2848-8-0x00000000000E0000-0x00000000000F5000-memory.dmp

    Filesize

    84KB

  • memory/2848-17-0x00000000000E0000-0x00000000000F5000-memory.dmp

    Filesize

    84KB

  • memory/2848-18-0x00000000000E0000-0x00000000000F5000-memory.dmp

    Filesize

    84KB

  • memory/2860-13-0x0000000000400000-0x000000000070E000-memory.dmp

    Filesize

    3.1MB