Analysis

  • max time kernel
    145s
  • max time network
    148s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240802-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
  • submitted
    24-09-2024 04:33

General

  • Target

    ad47fc74baa9ccd6f9b004a990b27393eba378eff2dcc7e2de3ce2b95501c7f4.exe

  • Size

    14.1MB

  • MD5

    82af93e89cf7525040978c5a5815c123

  • SHA1

    47193983774a29f19ada610751133ed5779915ac

  • SHA256

    ad47fc74baa9ccd6f9b004a990b27393eba378eff2dcc7e2de3ce2b95501c7f4

  • SHA512

    08cfb9037aa05269f7303ddbdc522889b5486295d6a8445edc485f39d800eca682c202edf58350eb08d8b0e84c7232c6c2f94698f5951eab402c92f3d5b06d06

  • SSDEEP

    24576:0sPvIp7DpbpbpbpbpbpbpbpbpbpbpbpbpbpbpbpbpbpbpbpbpbpbpbpbpbpbpbpJ:lvY7

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
  • 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\ad47fc74baa9ccd6f9b004a990b27393eba378eff2dcc7e2de3ce2b95501c7f4.exe
    "C:\Users\Admin\AppData\Local\Temp\ad47fc74baa9ccd6f9b004a990b27393eba378eff2dcc7e2de3ce2b95501c7f4.exe"
    1⤵
    • Checks computer location settings
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:3436
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\ezlfidod\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:2672
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\wqqilvzl.exe" C:\Windows\SysWOW64\ezlfidod\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:4376
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" create ezlfidod binPath= "C:\Windows\SysWOW64\ezlfidod\wqqilvzl.exe /d\"C:\Users\Admin\AppData\Local\Temp\ad47fc74baa9ccd6f9b004a990b27393eba378eff2dcc7e2de3ce2b95501c7f4.exe\"" type= own start= auto DisplayName= "wifi support"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:2272
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" description ezlfidod "wifi internet conection"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:3340
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" start ezlfidod
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:4888
    • 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:3696
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 3436 -s 1308
      2⤵
      • Program crash
      PID:2316
  • C:\Windows\SysWOW64\ezlfidod\wqqilvzl.exe
    C:\Windows\SysWOW64\ezlfidod\wqqilvzl.exe /d"C:\Users\Admin\AppData\Local\Temp\ad47fc74baa9ccd6f9b004a990b27393eba378eff2dcc7e2de3ce2b95501c7f4.exe"
    1⤵
    • Executes dropped EXE
    • Suspicious use of SetThreadContext
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:3748
    • 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:3108
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 3748 -s 520
      2⤵
      • Program crash
      PID:544
  • C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -pss -s 456 -p 3748 -ip 3748
    1⤵
      PID:3920
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -pss -s 504 -p 3436 -ip 3436
      1⤵
        PID:3120

      Network

      MITRE ATT&CK Enterprise v15

      Replay Monitor

      Loading Replay Monitor...

      Downloads

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

        Filesize

        14.3MB

        MD5

        da634f6953225c25a9307dd4b07dea5d

        SHA1

        44044605d60967066774c5acf8895128a132c6cb

        SHA256

        e39816173300f285acfb3b8bcb7cdd190ed4637d8993d43fd5f9724837734afa

        SHA512

        5e901640d7aec48bb5afbc780056f370044da25e3581eb47c22f7ea96f3158655fe0e46c10f922623bee3fd17a1b2e1659d70825cc2819310dd128db1da40a3c

      • memory/3108-39-0x00000000025E0000-0x00000000025F0000-memory.dmp

        Filesize

        64KB

      • memory/3108-40-0x00000000025E0000-0x00000000025F0000-memory.dmp

        Filesize

        64KB

      • memory/3108-24-0x0000000002E00000-0x000000000300F000-memory.dmp

        Filesize

        2.1MB

      • memory/3108-10-0x0000000001260000-0x0000000001275000-memory.dmp

        Filesize

        84KB

      • memory/3108-26-0x0000000002E00000-0x000000000300F000-memory.dmp

        Filesize

        2.1MB

      • memory/3108-27-0x00000000013F0000-0x00000000013F6000-memory.dmp

        Filesize

        24KB

      • memory/3108-53-0x00000000025F0000-0x00000000025F5000-memory.dmp

        Filesize

        20KB

      • memory/3108-30-0x00000000025E0000-0x00000000025F0000-memory.dmp

        Filesize

        64KB

      • memory/3108-33-0x00000000025E0000-0x00000000025F0000-memory.dmp

        Filesize

        64KB

      • memory/3108-50-0x00000000025F0000-0x00000000025F5000-memory.dmp

        Filesize

        20KB

      • memory/3108-35-0x00000000025E0000-0x00000000025F0000-memory.dmp

        Filesize

        64KB

      • memory/3108-19-0x0000000001260000-0x0000000001275000-memory.dmp

        Filesize

        84KB

      • memory/3108-20-0x0000000001260000-0x0000000001275000-memory.dmp

        Filesize

        84KB

      • memory/3108-22-0x0000000001260000-0x0000000001275000-memory.dmp

        Filesize

        84KB

      • memory/3108-49-0x00000000025E0000-0x00000000025F0000-memory.dmp

        Filesize

        64KB

      • memory/3108-58-0x00000000033D0000-0x00000000033D7000-memory.dmp

        Filesize

        28KB

      • memory/3108-57-0x0000000007E40000-0x000000000824B000-memory.dmp

        Filesize

        4.0MB

      • memory/3108-48-0x00000000025E0000-0x00000000025F0000-memory.dmp

        Filesize

        64KB

      • memory/3108-13-0x0000000001260000-0x0000000001275000-memory.dmp

        Filesize

        84KB

      • memory/3108-34-0x00000000025E0000-0x00000000025F0000-memory.dmp

        Filesize

        64KB

      • memory/3108-54-0x0000000007E40000-0x000000000824B000-memory.dmp

        Filesize

        4.0MB

      • memory/3108-47-0x00000000025E0000-0x00000000025F0000-memory.dmp

        Filesize

        64KB

      • memory/3108-46-0x00000000025E0000-0x00000000025F0000-memory.dmp

        Filesize

        64KB

      • memory/3108-45-0x00000000025E0000-0x00000000025F0000-memory.dmp

        Filesize

        64KB

      • memory/3108-44-0x00000000025E0000-0x00000000025F0000-memory.dmp

        Filesize

        64KB

      • memory/3108-43-0x00000000025E0000-0x00000000025F0000-memory.dmp

        Filesize

        64KB

      • memory/3108-42-0x00000000025E0000-0x00000000025F0000-memory.dmp

        Filesize

        64KB

      • memory/3108-41-0x00000000025E0000-0x00000000025F0000-memory.dmp

        Filesize

        64KB

      • memory/3108-36-0x00000000025E0000-0x00000000025F0000-memory.dmp

        Filesize

        64KB

      • memory/3108-37-0x00000000025E0000-0x00000000025F0000-memory.dmp

        Filesize

        64KB

      • memory/3108-38-0x00000000025E0000-0x00000000025F0000-memory.dmp

        Filesize

        64KB

      • memory/3436-1-0x00000000008D0000-0x00000000009D0000-memory.dmp

        Filesize

        1024KB

      • memory/3436-3-0x0000000000400000-0x0000000000415000-memory.dmp

        Filesize

        84KB

      • memory/3436-14-0x0000000000400000-0x0000000000683000-memory.dmp

        Filesize

        2.5MB

      • memory/3436-15-0x00000000007E0000-0x00000000007F3000-memory.dmp

        Filesize

        76KB

      • memory/3436-16-0x0000000000400000-0x0000000000415000-memory.dmp

        Filesize

        84KB

      • memory/3436-2-0x00000000007E0000-0x00000000007F3000-memory.dmp

        Filesize

        76KB

      • memory/3748-18-0x0000000000400000-0x0000000000683000-memory.dmp

        Filesize

        2.5MB

      • memory/3748-8-0x0000000000400000-0x0000000000683000-memory.dmp

        Filesize

        2.5MB

      • memory/3748-9-0x0000000000400000-0x0000000000683000-memory.dmp

        Filesize

        2.5MB