Analysis

  • max time kernel
    145s
  • max time network
    148s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20241007-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
  • submitted
    12-10-2024 11:12

General

  • Target

    f19839e819f084c250d561a7713457ca2d27e771394868707ede3a69482b9046.exe

  • Size

    10.0MB

  • MD5

    d000fc4d15df3dc09fb9c38e4fad1b41

  • SHA1

    8cb54b2f6b45fd55830372c21e6808ce42409596

  • SHA256

    f19839e819f084c250d561a7713457ca2d27e771394868707ede3a69482b9046

  • SHA512

    fd3258e909cc5ca15cf96c1ce9ca96891fed33f5269aedd729c16d5bdcb13b42d521c17b69513661b9ce28af0565e2531fe391d72f999013c7cd2fe2682bea11

  • SSDEEP

    3072:ryBN6fvr6AFsSrGxC4aw0j7zaKRi0GNLKyHO/10J/xXsxXsxXsxXsxXsxXsxXsxu:ai+AF/rGMUkOKRi0yXSy

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\f19839e819f084c250d561a7713457ca2d27e771394868707ede3a69482b9046.exe
    "C:\Users\Admin\AppData\Local\Temp\f19839e819f084c250d561a7713457ca2d27e771394868707ede3a69482b9046.exe"
    1⤵
    • Checks computer location settings
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:3108
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\rsqmvvtf\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:336
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\adwhhqrr.exe" C:\Windows\SysWOW64\rsqmvvtf\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:3008
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" create rsqmvvtf binPath= "C:\Windows\SysWOW64\rsqmvvtf\adwhhqrr.exe /d\"C:\Users\Admin\AppData\Local\Temp\f19839e819f084c250d561a7713457ca2d27e771394868707ede3a69482b9046.exe\"" type= own start= auto DisplayName= "wifi support"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:1260
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" description rsqmvvtf "wifi internet conection"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:1892
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" start rsqmvvtf
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:4804
    • 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:2236
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 3108 -s 1032
      2⤵
      • Program crash
      PID:3904
  • C:\Windows\SysWOW64\rsqmvvtf\adwhhqrr.exe
    C:\Windows\SysWOW64\rsqmvvtf\adwhhqrr.exe /d"C:\Users\Admin\AppData\Local\Temp\f19839e819f084c250d561a7713457ca2d27e771394868707ede3a69482b9046.exe"
    1⤵
    • Executes dropped EXE
    • Suspicious use of SetThreadContext
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:60
    • 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:3320
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 60 -s 516
      2⤵
      • Program crash
      PID:3680
  • C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -pss -s 420 -p 3108 -ip 3108
    1⤵
      PID:5052
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -pss -s 448 -p 60 -ip 60
      1⤵
        PID:2932

      Network

      MITRE ATT&CK Enterprise v15

      Replay Monitor

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      Downloads

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

        Filesize

        10.2MB

        MD5

        26c40938d31d10dfb581ec0e73e3b85f

        SHA1

        d1616540db07d1352bf25e7014d57bc09787692a

        SHA256

        3bfed0b4e05e48a47d569fc14bbbc1e6c58a228c0180ba1ae9a2535308ddcb58

        SHA512

        6bc70d199e655e278bf7f1a71948bfce55a33088a16b55dde504ce5b8e01db1418dca166181680f3ffdfe5b6f5b54bc918e4d9b32999ddad172de808879445b7

      • memory/60-17-0x0000000000400000-0x00000000007B6000-memory.dmp

        Filesize

        3.7MB

      • memory/60-11-0x0000000000400000-0x00000000007B6000-memory.dmp

        Filesize

        3.7MB

      • memory/60-12-0x0000000000400000-0x00000000007B6000-memory.dmp

        Filesize

        3.7MB

      • memory/3108-2-0x00000000023D0000-0x00000000023E3000-memory.dmp

        Filesize

        76KB

      • memory/3108-3-0x0000000000400000-0x0000000000415000-memory.dmp

        Filesize

        84KB

      • memory/3108-7-0x0000000000400000-0x00000000007B6000-memory.dmp

        Filesize

        3.7MB

      • memory/3108-9-0x0000000000400000-0x0000000000415000-memory.dmp

        Filesize

        84KB

      • memory/3108-8-0x00000000023D0000-0x00000000023E3000-memory.dmp

        Filesize

        76KB

      • memory/3108-1-0x0000000000A30000-0x0000000000B30000-memory.dmp

        Filesize

        1024KB

      • memory/3320-46-0x00000000025F0000-0x00000000025F5000-memory.dmp

        Filesize

        20KB

      • memory/3320-39-0x0000000002560000-0x0000000002570000-memory.dmp

        Filesize

        64KB

      • memory/3320-15-0x0000000000FA0000-0x0000000000FB5000-memory.dmp

        Filesize

        84KB

      • memory/3320-22-0x0000000002E00000-0x000000000300F000-memory.dmp

        Filesize

        2.1MB

      • memory/3320-50-0x0000000007D80000-0x000000000818B000-memory.dmp

        Filesize

        4.0MB

      • memory/3320-54-0x00000000033D0000-0x00000000033D7000-memory.dmp

        Filesize

        28KB

      • memory/3320-53-0x0000000007D80000-0x000000000818B000-memory.dmp

        Filesize

        4.0MB

      • memory/3320-49-0x00000000025F0000-0x00000000025F5000-memory.dmp

        Filesize

        20KB

      • memory/3320-13-0x0000000000FA0000-0x0000000000FB5000-memory.dmp

        Filesize

        84KB

      • memory/3320-45-0x0000000002560000-0x0000000002570000-memory.dmp

        Filesize

        64KB

      • memory/3320-44-0x0000000002560000-0x0000000002570000-memory.dmp

        Filesize

        64KB

      • memory/3320-43-0x0000000002560000-0x0000000002570000-memory.dmp

        Filesize

        64KB

      • memory/3320-42-0x0000000002560000-0x0000000002570000-memory.dmp

        Filesize

        64KB

      • memory/3320-41-0x0000000002560000-0x0000000002570000-memory.dmp

        Filesize

        64KB

      • memory/3320-40-0x0000000002560000-0x0000000002570000-memory.dmp

        Filesize

        64KB

      • memory/3320-16-0x0000000000FA0000-0x0000000000FB5000-memory.dmp

        Filesize

        84KB

      • memory/3320-38-0x0000000002560000-0x0000000002570000-memory.dmp

        Filesize

        64KB

      • memory/3320-37-0x0000000002560000-0x0000000002570000-memory.dmp

        Filesize

        64KB

      • memory/3320-36-0x0000000002560000-0x0000000002570000-memory.dmp

        Filesize

        64KB

      • memory/3320-35-0x0000000002560000-0x0000000002570000-memory.dmp

        Filesize

        64KB

      • memory/3320-34-0x0000000002560000-0x0000000002570000-memory.dmp

        Filesize

        64KB

      • memory/3320-33-0x0000000002560000-0x0000000002570000-memory.dmp

        Filesize

        64KB

      • memory/3320-32-0x0000000002560000-0x0000000002570000-memory.dmp

        Filesize

        64KB

      • memory/3320-31-0x0000000002560000-0x0000000002570000-memory.dmp

        Filesize

        64KB

      • memory/3320-30-0x0000000002560000-0x0000000002570000-memory.dmp

        Filesize

        64KB

      • memory/3320-29-0x0000000002560000-0x0000000002570000-memory.dmp

        Filesize

        64KB

      • memory/3320-26-0x0000000002560000-0x0000000002570000-memory.dmp

        Filesize

        64KB

      • memory/3320-23-0x0000000002550000-0x0000000002556000-memory.dmp

        Filesize

        24KB

      • memory/3320-20-0x0000000002E00000-0x000000000300F000-memory.dmp

        Filesize

        2.1MB