Analysis

  • max time kernel
    149s
  • max time network
    152s
  • platform
    windows11-21h2_x64
  • resource
    win11-20240802-en
  • resource tags

    arch:x64arch:x86image:win11-20240802-enlocale:en-usos:windows11-21h2-x64system
  • submitted
    05-09-2024 20:20

General

  • Target

    ee9e9a1840ff7f83b91b8eb3fc1e03df51aee5a94ac9cb3c63c0a37a9f3fcdd5.exe

  • Size

    400KB

  • MD5

    aa92bc82a2b3c733b305eef3ccb7ae6e

  • SHA1

    b52729db10f5c62ea03f4280e16cbd5304487bcb

  • SHA256

    ee9e9a1840ff7f83b91b8eb3fc1e03df51aee5a94ac9cb3c63c0a37a9f3fcdd5

  • SHA512

    de5d0741196ae12200d35736dc37f7d7fb809e63378ba5b0b8f0da962c608037f2e9ff6b35a371fd0a0d7182da86f3338697c47fbd246a0c1831a14edbead8b3

  • SSDEEP

    6144:ctBJHpf5eNmB7EEE+zwN6mdDHRIdJCBODBhMJWlN6w:ctBJHpfANmhrmdadJ5kO

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.

  • 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
  • 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\ee9e9a1840ff7f83b91b8eb3fc1e03df51aee5a94ac9cb3c63c0a37a9f3fcdd5.exe
    "C:\Users\Admin\AppData\Local\Temp\ee9e9a1840ff7f83b91b8eb3fc1e03df51aee5a94ac9cb3c63c0a37a9f3fcdd5.exe"
    1⤵
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:3092
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\pmsfvnud\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:2344
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\ragrpew.exe" C:\Windows\SysWOW64\pmsfvnud\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:5028
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" create pmsfvnud binPath= "C:\Windows\SysWOW64\pmsfvnud\ragrpew.exe /d\"C:\Users\Admin\AppData\Local\Temp\ee9e9a1840ff7f83b91b8eb3fc1e03df51aee5a94ac9cb3c63c0a37a9f3fcdd5.exe\"" type= own start= auto DisplayName= "wifi support"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:1788
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" description pmsfvnud "wifi internet conection"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:5036
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" start pmsfvnud
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:3528
    • 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:4756
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 3092 -s 700
      2⤵
      • Program crash
      PID:1864
  • C:\Windows\SysWOW64\pmsfvnud\ragrpew.exe
    C:\Windows\SysWOW64\pmsfvnud\ragrpew.exe /d"C:\Users\Admin\AppData\Local\Temp\ee9e9a1840ff7f83b91b8eb3fc1e03df51aee5a94ac9cb3c63c0a37a9f3fcdd5.exe"
    1⤵
    • Executes dropped EXE
    • Suspicious use of SetThreadContext
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:4644
    • 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:2952
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 4644 -s 544
      2⤵
      • Program crash
      PID:580
  • C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -pss -s 436 -p 3092 -ip 3092
    1⤵
      PID:1960
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -pss -s 548 -p 4644 -ip 4644
      1⤵
        PID:1220

      Network

      MITRE ATT&CK Enterprise v15

      Replay Monitor

      Loading Replay Monitor...

      Downloads

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

        Filesize

        10.4MB

        MD5

        e04ee5d050ce1193b610c80c01f60312

        SHA1

        2e8d92e6f43b6230d9f540bf3c1852e76e94814e

        SHA256

        fa826b9e7075e11da05b27dd67e48d43c487a328d9de58db6584d1b8f0fd2d51

        SHA512

        16ba1c9c302d665d85ec1de0e7ba66a589e58ae2349aca881af6cb983d18ac3cdbcc70ce54e2d74e192945689d0d654b73b283d4dedbb5f667bdd3d22959c3f4

      • memory/2952-42-0x0000000002B20000-0x0000000002B30000-memory.dmp

        Filesize

        64KB

      • memory/2952-44-0x0000000002DF0000-0x0000000002DF5000-memory.dmp

        Filesize

        20KB

      • memory/2952-43-0x0000000002B20000-0x0000000002B30000-memory.dmp

        Filesize

        64KB

      • memory/2952-21-0x0000000002B10000-0x0000000002B16000-memory.dmp

        Filesize

        24KB

      • memory/2952-24-0x0000000002B20000-0x0000000002B30000-memory.dmp

        Filesize

        64KB

      • memory/2952-34-0x0000000002B20000-0x0000000002B30000-memory.dmp

        Filesize

        64KB

      • memory/2952-13-0x0000000000990000-0x00000000009A5000-memory.dmp

        Filesize

        84KB

      • memory/2952-11-0x0000000000990000-0x00000000009A5000-memory.dmp

        Filesize

        84KB

      • memory/2952-15-0x0000000000990000-0x00000000009A5000-memory.dmp

        Filesize

        84KB

      • memory/2952-20-0x0000000002800000-0x0000000002A0F000-memory.dmp

        Filesize

        2.1MB

      • memory/2952-17-0x0000000002800000-0x0000000002A0F000-memory.dmp

        Filesize

        2.1MB

      • memory/2952-51-0x0000000007800000-0x0000000007C0B000-memory.dmp

        Filesize

        4.0MB

      • memory/2952-52-0x0000000007D50000-0x0000000007D57000-memory.dmp

        Filesize

        28KB

      • memory/2952-48-0x0000000007800000-0x0000000007C0B000-memory.dmp

        Filesize

        4.0MB

      • memory/2952-47-0x0000000002DF0000-0x0000000002DF5000-memory.dmp

        Filesize

        20KB

      • memory/2952-29-0x0000000002B20000-0x0000000002B30000-memory.dmp

        Filesize

        64KB

      • memory/2952-27-0x0000000002B20000-0x0000000002B30000-memory.dmp

        Filesize

        64KB

      • memory/2952-41-0x0000000002B20000-0x0000000002B30000-memory.dmp

        Filesize

        64KB

      • memory/2952-28-0x0000000002B20000-0x0000000002B30000-memory.dmp

        Filesize

        64KB

      • memory/2952-40-0x0000000002B20000-0x0000000002B30000-memory.dmp

        Filesize

        64KB

      • memory/2952-39-0x0000000002B20000-0x0000000002B30000-memory.dmp

        Filesize

        64KB

      • memory/2952-38-0x0000000002B20000-0x0000000002B30000-memory.dmp

        Filesize

        64KB

      • memory/2952-37-0x0000000002B20000-0x0000000002B30000-memory.dmp

        Filesize

        64KB

      • memory/2952-36-0x0000000002B20000-0x0000000002B30000-memory.dmp

        Filesize

        64KB

      • memory/2952-35-0x0000000002B20000-0x0000000002B30000-memory.dmp

        Filesize

        64KB

      • memory/2952-33-0x0000000002B20000-0x0000000002B30000-memory.dmp

        Filesize

        64KB

      • memory/2952-32-0x0000000002B20000-0x0000000002B30000-memory.dmp

        Filesize

        64KB

      • memory/2952-31-0x0000000002B20000-0x0000000002B30000-memory.dmp

        Filesize

        64KB

      • memory/2952-30-0x0000000002B20000-0x0000000002B30000-memory.dmp

        Filesize

        64KB

      • memory/3092-9-0x0000000000400000-0x0000000000415000-memory.dmp

        Filesize

        84KB

      • memory/3092-3-0x0000000000400000-0x0000000000415000-memory.dmp

        Filesize

        84KB

      • memory/3092-2-0x00000000042C0000-0x00000000042D3000-memory.dmp

        Filesize

        76KB

      • memory/3092-7-0x0000000000400000-0x000000000247C000-memory.dmp

        Filesize

        32.5MB

      • memory/3092-8-0x00000000042C0000-0x00000000042D3000-memory.dmp

        Filesize

        76KB

      • memory/3092-1-0x0000000002790000-0x0000000002890000-memory.dmp

        Filesize

        1024KB

      • memory/4644-14-0x0000000000400000-0x000000000247C000-memory.dmp

        Filesize

        32.5MB