Analysis

  • max time kernel
    145s
  • max time network
    149s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20241007-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
  • submitted
    16-12-2024 16:43

General

  • Target

    d490f432985a964e5442320f634b2cfd3aff7f32df02001abb308b7592b6a58b.exe

  • Size

    186KB

  • MD5

    4d9297b248ed13ac52436ef04511e986

  • SHA1

    3116c6d61588c105f45aac1955d2c97c13fdbc62

  • SHA256

    d490f432985a964e5442320f634b2cfd3aff7f32df02001abb308b7592b6a58b

  • SHA512

    6d8b8dd0ab65aeafab0de40d62a84a8f10933ec68721c9364be617de750040e55c6a8c83a03d347d42f674e8520a298f19adc883324bbedeb2b4a6c3e367f66b

  • SSDEEP

    3072:VkQXln7jRj2swOUpjv8ChQeG5CVjH5f6x:yQXlXRjLwOU2CvJx

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.

  • Tofsee family
  • 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
  • Looks up external IP address via web service 2 IoCs

    Uses a legitimate IP lookup service to find the infected system's external IP.

  • 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 8 IoCs
  • Suspicious use of WriteProcessMemory 23 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\d490f432985a964e5442320f634b2cfd3aff7f32df02001abb308b7592b6a58b.exe
    "C:\Users\Admin\AppData\Local\Temp\d490f432985a964e5442320f634b2cfd3aff7f32df02001abb308b7592b6a58b.exe"
    1⤵
    • Checks computer location settings
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:4916
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\qifkqpeo\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:2096
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\qaadrmzi.exe" C:\Windows\SysWOW64\qifkqpeo\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:4620
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" create qifkqpeo binPath= "C:\Windows\SysWOW64\qifkqpeo\qaadrmzi.exe /d\"C:\Users\Admin\AppData\Local\Temp\d490f432985a964e5442320f634b2cfd3aff7f32df02001abb308b7592b6a58b.exe\"" type= own start= auto DisplayName= "wifi support"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:1592
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" description qifkqpeo "wifi internet conection"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:2692
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" start qifkqpeo
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:5056
    • 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:964
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 4916 -s 640
      2⤵
      • Program crash
      PID:3628
  • C:\Windows\SysWOW64\qifkqpeo\qaadrmzi.exe
    C:\Windows\SysWOW64\qifkqpeo\qaadrmzi.exe /d"C:\Users\Admin\AppData\Local\Temp\d490f432985a964e5442320f634b2cfd3aff7f32df02001abb308b7592b6a58b.exe"
    1⤵
    • Executes dropped EXE
    • Suspicious use of SetThreadContext
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2408
    • 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:3588
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 2408 -s 512
      2⤵
      • Program crash
      PID:3796
  • C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -pss -s 444 -p 4916 -ip 4916
    1⤵
      PID:2804
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -pss -s 520 -p 2408 -ip 2408
      1⤵
        PID:4784

      Network

      MITRE ATT&CK Enterprise v15

      Replay Monitor

      Loading Replay Monitor...

      Downloads

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

        Filesize

        13.9MB

        MD5

        4f94f2bcb8683cedb5a95f03f7af22b7

        SHA1

        07f14e9be82dbef33b9961015327023cf60790ab

        SHA256

        bc56a263c5f8adae872764aaffb4da64a36e42bedfb278a52f31e546a99df743

        SHA512

        2956562d8341e83078307b541519ab413a170e1e58d2958b195e401f873a3ebd6f6a10c8f6388c2302c79245e0075eeb42ec21db8dc5a1f78c5dd4daf1f90e61

      • memory/2408-11-0x0000000000400000-0x000000000081A000-memory.dmp

        Filesize

        4.1MB

      • memory/2408-16-0x0000000000400000-0x000000000081A000-memory.dmp

        Filesize

        4.1MB

      • memory/2408-13-0x0000000000400000-0x000000000081A000-memory.dmp

        Filesize

        4.1MB

      • memory/3588-54-0x0000000006F00000-0x000000000730B000-memory.dmp

        Filesize

        4.0MB

      • memory/3588-47-0x00000000017F0000-0x00000000017F5000-memory.dmp

        Filesize

        20KB

      • memory/3588-30-0x00000000017E0000-0x00000000017F0000-memory.dmp

        Filesize

        64KB

      • memory/3588-31-0x00000000017E0000-0x00000000017F0000-memory.dmp

        Filesize

        64KB

      • memory/3588-32-0x00000000017E0000-0x00000000017F0000-memory.dmp

        Filesize

        64KB

      • memory/3588-15-0x0000000000120000-0x0000000000135000-memory.dmp

        Filesize

        84KB

      • memory/3588-33-0x00000000017E0000-0x00000000017F0000-memory.dmp

        Filesize

        64KB

      • memory/3588-12-0x0000000000120000-0x0000000000135000-memory.dmp

        Filesize

        84KB

      • memory/3588-18-0x0000000000120000-0x0000000000135000-memory.dmp

        Filesize

        84KB

      • memory/3588-55-0x00000000023D0000-0x00000000023D7000-memory.dmp

        Filesize

        28KB

      • memory/3588-21-0x0000000002000000-0x000000000220F000-memory.dmp

        Filesize

        2.1MB

      • memory/3588-23-0x0000000002000000-0x000000000220F000-memory.dmp

        Filesize

        2.1MB

      • memory/3588-27-0x00000000017E0000-0x00000000017F0000-memory.dmp

        Filesize

        64KB

      • memory/3588-24-0x00000000017D0000-0x00000000017D6000-memory.dmp

        Filesize

        24KB

      • memory/3588-34-0x00000000017E0000-0x00000000017F0000-memory.dmp

        Filesize

        64KB

      • memory/3588-51-0x0000000006F00000-0x000000000730B000-memory.dmp

        Filesize

        4.0MB

      • memory/3588-50-0x00000000017F0000-0x00000000017F5000-memory.dmp

        Filesize

        20KB

      • memory/3588-35-0x00000000017E0000-0x00000000017F0000-memory.dmp

        Filesize

        64KB

      • memory/3588-46-0x00000000017E0000-0x00000000017F0000-memory.dmp

        Filesize

        64KB

      • memory/3588-45-0x00000000017E0000-0x00000000017F0000-memory.dmp

        Filesize

        64KB

      • memory/3588-44-0x00000000017E0000-0x00000000017F0000-memory.dmp

        Filesize

        64KB

      • memory/3588-43-0x00000000017E0000-0x00000000017F0000-memory.dmp

        Filesize

        64KB

      • memory/3588-42-0x00000000017E0000-0x00000000017F0000-memory.dmp

        Filesize

        64KB

      • memory/3588-41-0x00000000017E0000-0x00000000017F0000-memory.dmp

        Filesize

        64KB

      • memory/3588-40-0x00000000017E0000-0x00000000017F0000-memory.dmp

        Filesize

        64KB

      • memory/3588-39-0x00000000017E0000-0x00000000017F0000-memory.dmp

        Filesize

        64KB

      • memory/3588-38-0x00000000017E0000-0x00000000017F0000-memory.dmp

        Filesize

        64KB

      • memory/3588-37-0x00000000017E0000-0x00000000017F0000-memory.dmp

        Filesize

        64KB

      • memory/3588-36-0x00000000017E0000-0x00000000017F0000-memory.dmp

        Filesize

        64KB

      • memory/4916-8-0x0000000002560000-0x0000000002573000-memory.dmp

        Filesize

        76KB

      • memory/4916-1-0x0000000000A80000-0x0000000000B80000-memory.dmp

        Filesize

        1024KB

      • memory/4916-2-0x0000000002560000-0x0000000002573000-memory.dmp

        Filesize

        76KB

      • memory/4916-3-0x0000000000400000-0x0000000000415000-memory.dmp

        Filesize

        84KB

      • memory/4916-9-0x0000000000400000-0x0000000000415000-memory.dmp

        Filesize

        84KB

      • memory/4916-7-0x0000000000400000-0x000000000081A000-memory.dmp

        Filesize

        4.1MB