Analysis

  • max time kernel
    149s
  • max time network
    151s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240802-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
  • submitted
    28-09-2024 15:28

General

  • Target

    e6c0fd16f7e1b1b73832a0c559eb5d089585027254bdf184aca5b60af8ac1487.exe

  • Size

    194KB

  • MD5

    f69e35008ad31989cad3811a319b264b

  • SHA1

    dac099de5c3d43638b13318e7e082f0db6f61884

  • SHA256

    e6c0fd16f7e1b1b73832a0c559eb5d089585027254bdf184aca5b60af8ac1487

  • SHA512

    a00e1c846883064b76bcadb88bb57db4358d0d096d1d7fec329e90f57ee5f77699bc3e6b4b5f571305850e218affe80d42515a3cbbcd02db2f6a1d62a72d832e

  • SSDEEP

    3072:IaXTO21fKhR2MbLUYUQvkWnp95DhO2Wv3yfrWIatkh8MKL5PHr8A8HOgzb3V:9XTpUh/bLdTM6AvCzWIatkh8MM5OV

Malware Config

Extracted

Family

tofsee

C2

svartalfheim.top

jotunheim.name

Signatures

  • Tofsee

    Backdoor/botnet which carries out malicious activities based on commands from a C2 server.

  • Creates new service(s) 2 TTPs
  • Modifies Windows Firewall 2 TTPs 1 IoCs
  • Sets service image path in registry 2 TTPs 1 IoCs
  • Checks computer location settings 2 TTPs 1 IoCs

    Looks up country code configured in the registry, likely geofence.

  • Deletes itself 1 IoCs
  • Executes dropped EXE 1 IoCs
  • Drops file in System32 directory 2 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.

  • Program crash 2 IoCs
  • 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.

  • Modifies data under HKEY_USERS 7 IoCs
  • Suspicious use of WriteProcessMemory 23 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\e6c0fd16f7e1b1b73832a0c559eb5d089585027254bdf184aca5b60af8ac1487.exe
    "C:\Users\Admin\AppData\Local\Temp\e6c0fd16f7e1b1b73832a0c559eb5d089585027254bdf184aca5b60af8ac1487.exe"
    1⤵
    • Checks computer location settings
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:1432
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\opsaorje\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:3592
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\pfhuldo.exe" C:\Windows\SysWOW64\opsaorje\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:3184
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" create opsaorje binPath= "C:\Windows\SysWOW64\opsaorje\pfhuldo.exe /d\"C:\Users\Admin\AppData\Local\Temp\e6c0fd16f7e1b1b73832a0c559eb5d089585027254bdf184aca5b60af8ac1487.exe\"" type= own start= auto DisplayName= "wifi support"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:1460
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" description opsaorje "wifi internet conection"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:4860
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" start opsaorje
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:5040
    • 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:2148
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 1432 -s 1028
      2⤵
      • Program crash
      PID:740
  • C:\Windows\SysWOW64\opsaorje\pfhuldo.exe
    C:\Windows\SysWOW64\opsaorje\pfhuldo.exe /d"C:\Users\Admin\AppData\Local\Temp\e6c0fd16f7e1b1b73832a0c559eb5d089585027254bdf184aca5b60af8ac1487.exe"
    1⤵
    • Executes dropped EXE
    • Suspicious use of SetThreadContext
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:1496
    • C:\Windows\SysWOW64\svchost.exe
      svchost.exe
      2⤵
      • Sets service image path in registry
      • Deletes itself
      • Drops file in System32 directory
      • System Location Discovery: System Language Discovery
      • Modifies data under HKEY_USERS
      PID:1508
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 1496 -s 528
      2⤵
      • Program crash
      PID:4164
  • C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -pss -s 448 -p 1432 -ip 1432
    1⤵
      PID:2072
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 1496 -ip 1496
      1⤵
        PID:2304

      Network

      MITRE ATT&CK Enterprise v15

      Replay Monitor

      Loading Replay Monitor...

      Downloads

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

        Filesize

        14.2MB

        MD5

        2af1171ec2c197b34c878c5e79e0d762

        SHA1

        7643aae623895dad4d43fac5f33f902fe0c60f90

        SHA256

        10001c26db1e6beb9ba261632c4fc1d6859176586e48207df0e1ae84d238c851

        SHA512

        a0dcb24bd5bc866cbe90be81aa670a53a4a3052259f54f35e0dacf026586cc4dcf43bc777a9be068e17d82354832647ba80b733491bbb778400cde68142f80f2

      • memory/1432-1-0x0000000000560000-0x0000000000660000-memory.dmp

        Filesize

        1024KB

      • memory/1432-3-0x0000000000400000-0x0000000000415000-memory.dmp

        Filesize

        84KB

      • memory/1432-7-0x0000000000400000-0x000000000049D000-memory.dmp

        Filesize

        628KB

      • memory/1432-9-0x0000000000400000-0x0000000000415000-memory.dmp

        Filesize

        84KB

      • memory/1432-8-0x0000000002200000-0x0000000002213000-memory.dmp

        Filesize

        76KB

      • memory/1432-2-0x0000000002200000-0x0000000002213000-memory.dmp

        Filesize

        76KB

      • memory/1496-18-0x0000000000400000-0x000000000049D000-memory.dmp

        Filesize

        628KB

      • memory/1496-11-0x0000000000400000-0x000000000049D000-memory.dmp

        Filesize

        628KB

      • memory/1496-13-0x0000000000400000-0x000000000049D000-memory.dmp

        Filesize

        628KB

      • memory/1496-12-0x0000000000400000-0x000000000049D000-memory.dmp

        Filesize

        628KB

      • memory/1508-46-0x0000000001BE0000-0x0000000001BF0000-memory.dmp

        Filesize

        64KB

      • memory/1508-38-0x0000000001BE0000-0x0000000001BF0000-memory.dmp

        Filesize

        64KB

      • memory/1508-16-0x00000000005A0000-0x00000000005B5000-memory.dmp

        Filesize

        84KB

      • memory/1508-44-0x0000000001BE0000-0x0000000001BF0000-memory.dmp

        Filesize

        64KB

      • memory/1508-51-0x0000000007600000-0x0000000007A0B000-memory.dmp

        Filesize

        4.0MB

      • memory/1508-50-0x0000000001BF0000-0x0000000001BF5000-memory.dmp

        Filesize

        20KB

      • memory/1508-55-0x0000000002BD0000-0x0000000002BD7000-memory.dmp

        Filesize

        28KB

      • memory/1508-54-0x0000000007600000-0x0000000007A0B000-memory.dmp

        Filesize

        4.0MB

      • memory/1508-47-0x0000000001BF0000-0x0000000001BF5000-memory.dmp

        Filesize

        20KB

      • memory/1508-14-0x00000000005A0000-0x00000000005B5000-memory.dmp

        Filesize

        84KB

      • memory/1508-45-0x0000000001BE0000-0x0000000001BF0000-memory.dmp

        Filesize

        64KB

      • memory/1508-43-0x0000000001BE0000-0x0000000001BF0000-memory.dmp

        Filesize

        64KB

      • memory/1508-42-0x0000000001BE0000-0x0000000001BF0000-memory.dmp

        Filesize

        64KB

      • memory/1508-41-0x0000000001BE0000-0x0000000001BF0000-memory.dmp

        Filesize

        64KB

      • memory/1508-39-0x0000000001BE0000-0x0000000001BF0000-memory.dmp

        Filesize

        64KB

      • memory/1508-17-0x00000000005A0000-0x00000000005B5000-memory.dmp

        Filesize

        84KB

      • memory/1508-37-0x0000000001BE0000-0x0000000001BF0000-memory.dmp

        Filesize

        64KB

      • memory/1508-36-0x0000000001BE0000-0x0000000001BF0000-memory.dmp

        Filesize

        64KB

      • memory/1508-35-0x0000000001BE0000-0x0000000001BF0000-memory.dmp

        Filesize

        64KB

      • memory/1508-34-0x0000000001BE0000-0x0000000001BF0000-memory.dmp

        Filesize

        64KB

      • memory/1508-33-0x0000000001BE0000-0x0000000001BF0000-memory.dmp

        Filesize

        64KB

      • memory/1508-32-0x0000000001BE0000-0x0000000001BF0000-memory.dmp

        Filesize

        64KB

      • memory/1508-31-0x0000000001BE0000-0x0000000001BF0000-memory.dmp

        Filesize

        64KB

      • memory/1508-30-0x0000000001BE0000-0x0000000001BF0000-memory.dmp

        Filesize

        64KB

      • memory/1508-23-0x0000000002600000-0x000000000280F000-memory.dmp

        Filesize

        2.1MB

      • memory/1508-40-0x0000000001BE0000-0x0000000001BF0000-memory.dmp

        Filesize

        64KB

      • memory/1508-20-0x0000000002600000-0x000000000280F000-memory.dmp

        Filesize

        2.1MB

      • memory/1508-27-0x0000000001BE0000-0x0000000001BF0000-memory.dmp

        Filesize

        64KB

      • memory/1508-24-0x0000000001BD0000-0x0000000001BD6000-memory.dmp

        Filesize

        24KB