Analysis

  • max time kernel
    148s
  • max time network
    151s
  • 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 08:15

General

  • Target

    a30fdfa60f93f1d21c6817b522b4c63b52bcd4d5d186c1ff89d843d6bbfb53b4.exe

  • Size

    401KB

  • MD5

    09622c398a7e6f315f566bc7cabfec89

  • SHA1

    c3ccda11c40b396615e5facefd3bf02d03d96c7b

  • SHA256

    a30fdfa60f93f1d21c6817b522b4c63b52bcd4d5d186c1ff89d843d6bbfb53b4

  • SHA512

    5a5cbe7e55df348c46d912158dd58d735c2a289122ac46da106ee41c21432f7eea6e49dee0f0a243112c050fc6aaa85a2bddbcef7a2abd3009dcfa319746102b

  • SSDEEP

    6144:x2tEWSHPfTo04jYUy85YbRE3TgVPEHmVR0p//dZgC87mw4iklA:xvWSHPfTo04jSGYVE3hG0p/lZDsg

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\a30fdfa60f93f1d21c6817b522b4c63b52bcd4d5d186c1ff89d843d6bbfb53b4.exe
    "C:\Users\Admin\AppData\Local\Temp\a30fdfa60f93f1d21c6817b522b4c63b52bcd4d5d186c1ff89d843d6bbfb53b4.exe"
    1⤵
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:3472
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\yoadetiv\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:4448
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\uxqbbkll.exe" C:\Windows\SysWOW64\yoadetiv\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:928
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" create yoadetiv binPath= "C:\Windows\SysWOW64\yoadetiv\uxqbbkll.exe /d\"C:\Users\Admin\AppData\Local\Temp\a30fdfa60f93f1d21c6817b522b4c63b52bcd4d5d186c1ff89d843d6bbfb53b4.exe\"" type= own start= auto DisplayName= "wifi support"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:4440
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" description yoadetiv "wifi internet conection"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:5020
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" start yoadetiv
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:4216
    • 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:4656
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 3472 -s 1344
      2⤵
      • Program crash
      PID:2912
  • C:\Windows\SysWOW64\yoadetiv\uxqbbkll.exe
    C:\Windows\SysWOW64\yoadetiv\uxqbbkll.exe /d"C:\Users\Admin\AppData\Local\Temp\a30fdfa60f93f1d21c6817b522b4c63b52bcd4d5d186c1ff89d843d6bbfb53b4.exe"
    1⤵
    • Executes dropped EXE
    • Suspicious use of SetThreadContext
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:3920
    • 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:1100
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 3920 -s 560
      2⤵
      • Program crash
      PID:2604
  • C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -pss -s 436 -p 3472 -ip 3472
    1⤵
      PID:2372
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -pss -s 416 -p 3920 -ip 3920
      1⤵
        PID:1972

      Network

      MITRE ATT&CK Enterprise v15

      Replay Monitor

      Loading Replay Monitor...

      Downloads

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

        Filesize

        11.8MB

        MD5

        c301747d4d357beda83ffb18d04d3f85

        SHA1

        18ca72f4ed8ce0d24ae5bb443fa473bb3fb7599b

        SHA256

        ba83bd65ebd625b8e7764f2fac6a39e354e5924ae3fc46ec7b3c2bfe28c24c27

        SHA512

        aea41fc80a8e6ddab908ba41effed4be432385738880684bc861f680d8a31b869bbdcaf5da7e888a1598fcf6ef6175f497c4c9b25b78b4c64d9cd68e5e35cb70

      • memory/1100-38-0x0000000001D60000-0x0000000001D70000-memory.dmp

        Filesize

        64KB

      • memory/1100-24-0x00000000009F0000-0x00000000009F6000-memory.dmp

        Filesize

        24KB

      • memory/1100-54-0x0000000007480000-0x000000000788B000-memory.dmp

        Filesize

        4.0MB

      • memory/1100-45-0x0000000001D60000-0x0000000001D70000-memory.dmp

        Filesize

        64KB

      • memory/1100-27-0x0000000001D60000-0x0000000001D70000-memory.dmp

        Filesize

        64KB

      • memory/1100-30-0x0000000001D60000-0x0000000001D70000-memory.dmp

        Filesize

        64KB

      • memory/1100-13-0x00000000005E0000-0x00000000005F5000-memory.dmp

        Filesize

        84KB

      • memory/1100-31-0x0000000001D60000-0x0000000001D70000-memory.dmp

        Filesize

        64KB

      • memory/1100-46-0x0000000001D60000-0x0000000001D70000-memory.dmp

        Filesize

        64KB

      • memory/1100-15-0x00000000005E0000-0x00000000005F5000-memory.dmp

        Filesize

        84KB

      • memory/1100-16-0x00000000005E0000-0x00000000005F5000-memory.dmp

        Filesize

        84KB

      • memory/1100-32-0x0000000001D60000-0x0000000001D70000-memory.dmp

        Filesize

        64KB

      • memory/1100-21-0x0000000002600000-0x000000000280F000-memory.dmp

        Filesize

        2.1MB

      • memory/1100-23-0x0000000002600000-0x000000000280F000-memory.dmp

        Filesize

        2.1MB

      • memory/1100-55-0x00000000029D0000-0x00000000029D7000-memory.dmp

        Filesize

        28KB

      • memory/1100-51-0x0000000007480000-0x000000000788B000-memory.dmp

        Filesize

        4.0MB

      • memory/1100-50-0x0000000001DF0000-0x0000000001DF5000-memory.dmp

        Filesize

        20KB

      • memory/1100-47-0x0000000001DF0000-0x0000000001DF5000-memory.dmp

        Filesize

        20KB

      • memory/1100-33-0x0000000001D60000-0x0000000001D70000-memory.dmp

        Filesize

        64KB

      • memory/1100-34-0x0000000001D60000-0x0000000001D70000-memory.dmp

        Filesize

        64KB

      • memory/1100-39-0x0000000001D60000-0x0000000001D70000-memory.dmp

        Filesize

        64KB

      • memory/1100-43-0x0000000001D60000-0x0000000001D70000-memory.dmp

        Filesize

        64KB

      • memory/1100-42-0x0000000001D60000-0x0000000001D70000-memory.dmp

        Filesize

        64KB

      • memory/1100-41-0x0000000001D60000-0x0000000001D70000-memory.dmp

        Filesize

        64KB

      • memory/1100-40-0x0000000001D60000-0x0000000001D70000-memory.dmp

        Filesize

        64KB

      • memory/1100-44-0x0000000001D60000-0x0000000001D70000-memory.dmp

        Filesize

        64KB

      • memory/1100-35-0x0000000001D60000-0x0000000001D70000-memory.dmp

        Filesize

        64KB

      • memory/1100-37-0x0000000001D60000-0x0000000001D70000-memory.dmp

        Filesize

        64KB

      • memory/1100-36-0x0000000001D60000-0x0000000001D70000-memory.dmp

        Filesize

        64KB

      • memory/3472-1-0x0000000000760000-0x0000000000860000-memory.dmp

        Filesize

        1024KB

      • memory/3472-3-0x0000000000400000-0x0000000000415000-memory.dmp

        Filesize

        84KB

      • memory/3472-7-0x0000000000400000-0x00000000005F8000-memory.dmp

        Filesize

        2.0MB

      • memory/3472-8-0x0000000002310000-0x0000000002323000-memory.dmp

        Filesize

        76KB

      • memory/3472-9-0x0000000000400000-0x0000000000415000-memory.dmp

        Filesize

        84KB

      • memory/3472-2-0x0000000002310000-0x0000000002323000-memory.dmp

        Filesize

        76KB

      • memory/3920-11-0x0000000000400000-0x00000000005F8000-memory.dmp

        Filesize

        2.0MB

      • memory/3920-18-0x0000000000400000-0x00000000005F8000-memory.dmp

        Filesize

        2.0MB

      • memory/3920-12-0x0000000000400000-0x00000000005F8000-memory.dmp

        Filesize

        2.0MB