Analysis

  • max time kernel
    149s
  • max time network
    152s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240412-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240412-enlocale:en-usos:windows10-2004-x64system
  • submitted
    17-04-2024 13:19

General

  • Target

    8240e21305559cabc41ccf60e6683e8fb3f6ae80a20e289e687366ccc4594c40.exe

  • Size

    203KB

  • MD5

    6b7204c0cb219b7d01999025ccd85fdc

  • SHA1

    1f57fbfdcf6d71d0d5a36602e1e83bc9dee3ac7a

  • SHA256

    8240e21305559cabc41ccf60e6683e8fb3f6ae80a20e289e687366ccc4594c40

  • SHA512

    68a19f84eb4d73394a2bb2b7629f9582e91b54713b19e71722ba5359636ce36d9aa9951af7b729d65752a7aff916ee91abd87f34c2e4aad43cebef777800742b

  • SSDEEP

    3072:eSf/dfuraZJXENc8uCXJiXK1K2LS1G2B+vioyUSdUuD5BBNcRrxOJ+cmH:eSf/MQ15t1TB+PSHexLco

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) 1 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).

  • Program crash 2 IoCs
  • Modifies data under HKEY_USERS 7 IoCs
  • Suspicious use of WriteProcessMemory 23 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\8240e21305559cabc41ccf60e6683e8fb3f6ae80a20e289e687366ccc4594c40.exe
    "C:\Users\Admin\AppData\Local\Temp\8240e21305559cabc41ccf60e6683e8fb3f6ae80a20e289e687366ccc4594c40.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:3716
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\hauaxcm\
      2⤵
        PID:404
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\jmfqqzaa.exe" C:\Windows\SysWOW64\hauaxcm\
        2⤵
          PID:3404
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create hauaxcm binPath= "C:\Windows\SysWOW64\hauaxcm\jmfqqzaa.exe /d\"C:\Users\Admin\AppData\Local\Temp\8240e21305559cabc41ccf60e6683e8fb3f6ae80a20e289e687366ccc4594c40.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:4408
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description hauaxcm "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:4516
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start hauaxcm
          2⤵
          • Launches sc.exe
          PID:3920
        • 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
          PID:2240
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -u -p 3716 -s 584
          2⤵
          • Program crash
          PID:2780
      • C:\Windows\SysWOW64\hauaxcm\jmfqqzaa.exe
        C:\Windows\SysWOW64\hauaxcm\jmfqqzaa.exe /d"C:\Users\Admin\AppData\Local\Temp\8240e21305559cabc41ccf60e6683e8fb3f6ae80a20e289e687366ccc4594c40.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:1236
        • C:\Windows\SysWOW64\svchost.exe
          svchost.exe
          2⤵
          • Sets service image path in registry
          • Deletes itself
          • Drops file in System32 directory
          • Modifies data under HKEY_USERS
          PID:3936
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -u -p 1236 -s 524
          2⤵
          • Program crash
          PID:1420
      • C:\Windows\SysWOW64\WerFault.exe
        C:\Windows\SysWOW64\WerFault.exe -pss -s 456 -p 1236 -ip 1236
        1⤵
          PID:3028
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -pss -s 452 -p 3716 -ip 3716
          1⤵
            PID:460

          Network

          MITRE ATT&CK Matrix ATT&CK v13

          Persistence

          Create or Modify System Process

          2
          T1543

          Windows Service

          2
          T1543.003

          Boot or Logon Autostart Execution

          1
          T1547

          Registry Run Keys / Startup Folder

          1
          T1547.001

          Privilege Escalation

          Create or Modify System Process

          2
          T1543

          Windows Service

          2
          T1543.003

          Boot or Logon Autostart Execution

          1
          T1547

          Registry Run Keys / Startup Folder

          1
          T1547.001

          Defense Evasion

          Impair Defenses

          1
          T1562

          Disable or Modify System Firewall

          1
          T1562.004

          Modify Registry

          1
          T1112

          Discovery

          Query Registry

          1
          T1012

          System Information Discovery

          2
          T1082

          Replay Monitor

          Loading Replay Monitor...

          Downloads

          • C:\Users\Admin\AppData\Local\Temp\jmfqqzaa.exe
            Filesize

            10.3MB

            MD5

            4f5eeeb213bf72594e5c8056d5df89b9

            SHA1

            844e71248dac9214f02144b71de39b73d71e4f43

            SHA256

            0ef0b1f65f235b17422ee35055278800a944ec34cdcbf4853b1a6a82aa9ddd70

            SHA512

            269edbc34aa34971b524ed3283a92cd8ea8a01ad68cb7c8138360fbfb5301340df3ca13a85b94c6f2960bbfbb920683871e664aec165025763e8dd63ff942147

          • memory/1236-15-0x0000000000400000-0x0000000000438000-memory.dmp
            Filesize

            224KB

          • memory/1236-8-0x00000000007B0000-0x00000000008B0000-memory.dmp
            Filesize

            1024KB

          • memory/1236-11-0x0000000000400000-0x0000000000438000-memory.dmp
            Filesize

            224KB

          • memory/1236-9-0x0000000000590000-0x00000000005A3000-memory.dmp
            Filesize

            76KB

          • memory/3716-2-0x0000000002050000-0x0000000002063000-memory.dmp
            Filesize

            76KB

          • memory/3716-3-0x0000000000400000-0x0000000000438000-memory.dmp
            Filesize

            224KB

          • memory/3716-1-0x0000000000470000-0x0000000000570000-memory.dmp
            Filesize

            1024KB

          • memory/3716-16-0x0000000000400000-0x0000000000438000-memory.dmp
            Filesize

            224KB

          • memory/3936-34-0x0000000001F70000-0x0000000001F80000-memory.dmp
            Filesize

            64KB

          • memory/3936-39-0x0000000001F70000-0x0000000001F80000-memory.dmp
            Filesize

            64KB

          • memory/3936-17-0x0000000000AB0000-0x0000000000AC5000-memory.dmp
            Filesize

            84KB

          • memory/3936-18-0x0000000000AB0000-0x0000000000AC5000-memory.dmp
            Filesize

            84KB

          • memory/3936-20-0x0000000002800000-0x0000000002A0F000-memory.dmp
            Filesize

            2.1MB

          • memory/3936-23-0x0000000002800000-0x0000000002A0F000-memory.dmp
            Filesize

            2.1MB

          • memory/3936-24-0x0000000001F60000-0x0000000001F66000-memory.dmp
            Filesize

            24KB

          • memory/3936-27-0x0000000001F70000-0x0000000001F80000-memory.dmp
            Filesize

            64KB

          • memory/3936-31-0x0000000001F70000-0x0000000001F80000-memory.dmp
            Filesize

            64KB

          • memory/3936-33-0x0000000001F70000-0x0000000001F80000-memory.dmp
            Filesize

            64KB

          • memory/3936-32-0x0000000001F70000-0x0000000001F80000-memory.dmp
            Filesize

            64KB

          • memory/3936-10-0x0000000000AB0000-0x0000000000AC5000-memory.dmp
            Filesize

            84KB

          • memory/3936-30-0x0000000001F70000-0x0000000001F80000-memory.dmp
            Filesize

            64KB

          • memory/3936-35-0x0000000001F70000-0x0000000001F80000-memory.dmp
            Filesize

            64KB

          • memory/3936-36-0x0000000001F70000-0x0000000001F80000-memory.dmp
            Filesize

            64KB

          • memory/3936-14-0x0000000000AB0000-0x0000000000AC5000-memory.dmp
            Filesize

            84KB

          • memory/3936-40-0x0000000001F70000-0x0000000001F80000-memory.dmp
            Filesize

            64KB

          • memory/3936-42-0x0000000001F70000-0x0000000001F80000-memory.dmp
            Filesize

            64KB

          • memory/3936-47-0x0000000002BD0000-0x0000000002BD5000-memory.dmp
            Filesize

            20KB

          • memory/3936-46-0x0000000001F70000-0x0000000001F80000-memory.dmp
            Filesize

            64KB

          • memory/3936-45-0x0000000001F70000-0x0000000001F80000-memory.dmp
            Filesize

            64KB

          • memory/3936-50-0x0000000002BD0000-0x0000000002BD5000-memory.dmp
            Filesize

            20KB

          • memory/3936-44-0x0000000001F70000-0x0000000001F80000-memory.dmp
            Filesize

            64KB

          • memory/3936-51-0x0000000007680000-0x0000000007A8B000-memory.dmp
            Filesize

            4.0MB

          • memory/3936-43-0x0000000001F70000-0x0000000001F80000-memory.dmp
            Filesize

            64KB

          • memory/3936-41-0x0000000001F70000-0x0000000001F80000-memory.dmp
            Filesize

            64KB

          • memory/3936-38-0x0000000001F70000-0x0000000001F80000-memory.dmp
            Filesize

            64KB

          • memory/3936-37-0x0000000001F70000-0x0000000001F80000-memory.dmp
            Filesize

            64KB

          • memory/3936-54-0x0000000007680000-0x0000000007A8B000-memory.dmp
            Filesize

            4.0MB

          • memory/3936-55-0x0000000002BE0000-0x0000000002BE7000-memory.dmp
            Filesize

            28KB

          • memory/3936-59-0x0000000000AB0000-0x0000000000AC5000-memory.dmp
            Filesize

            84KB