Analysis

  • max time kernel
    149s
  • max time network
    149s
  • platform
    windows7_x64
  • resource
    win7-20240903-en
  • resource tags

    arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
  • submitted
    05/09/2024, 05:27

General

  • Target

    b84685b177c7bbd6e54c0cd81f5ac41c02e2c77a400b71a830636f93a686eaaf.exe

  • Size

    11.6MB

  • MD5

    fed6d9f141d4ac6b3388a2c90722bd62

  • SHA1

    3480f699c94d4a520c8d92dfd2f6c84d5bd9668b

  • SHA256

    b84685b177c7bbd6e54c0cd81f5ac41c02e2c77a400b71a830636f93a686eaaf

  • SHA512

    f678216084e177bc51879d697f6e4201449874ed1c6f4c41fc1cb62aecf8ed5c3ab17784c1d30c481ee99c727fe0a29cd2854bdcaf554b3da425d59b5e957719

  • SSDEEP

    6144:rc6OZDisWsD0Td2HJxO+m8PuG1R4WnWjrsaz:r1OZDisvwdaxO0PuG1R4CWs

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.

  • Windows security bypass 2 TTPs 1 IoCs
  • 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.

  • 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 30 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\b84685b177c7bbd6e54c0cd81f5ac41c02e2c77a400b71a830636f93a686eaaf.exe
    "C:\Users\Admin\AppData\Local\Temp\b84685b177c7bbd6e54c0cd81f5ac41c02e2c77a400b71a830636f93a686eaaf.exe"
    1⤵
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2980
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\ncdxweae\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:2716
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\gnuxmatd.exe" C:\Windows\SysWOW64\ncdxweae\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:2868
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" create ncdxweae binPath= "C:\Windows\SysWOW64\ncdxweae\gnuxmatd.exe /d\"C:\Users\Admin\AppData\Local\Temp\b84685b177c7bbd6e54c0cd81f5ac41c02e2c77a400b71a830636f93a686eaaf.exe\"" type= own start= auto DisplayName= "wifi support"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:2740
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" description ncdxweae "wifi internet conection"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:2204
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" start ncdxweae
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:2828
    • 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:2664
  • C:\Windows\SysWOW64\ncdxweae\gnuxmatd.exe
    C:\Windows\SysWOW64\ncdxweae\gnuxmatd.exe /d"C:\Users\Admin\AppData\Local\Temp\b84685b177c7bbd6e54c0cd81f5ac41c02e2c77a400b71a830636f93a686eaaf.exe"
    1⤵
    • Executes dropped EXE
    • Suspicious use of SetThreadContext
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2744
    • C:\Windows\SysWOW64\svchost.exe
      svchost.exe
      2⤵
      • Windows security bypass
      • 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:2932

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    13.0MB

    MD5

    2f6c6bbae5029fbcc7c831378dabbdf6

    SHA1

    fef8fd2f0815febc9e02e2b47ed116e8ce1c7089

    SHA256

    6be2daa2eb39e3e2e7265f899515b2a3352f5ba8fef313be06628383dc610ab1

    SHA512

    7834f3906726c84171dd0166a4a6632a2d1a5f61f44a42fff4bf6335724ab0338a17ceb7d244ad2f647a5450fbeeb358633a2310eac3a8d5537d07acd92b7593

  • memory/2744-12-0x0000000000400000-0x00000000005FE000-memory.dmp

    Filesize

    2.0MB

  • memory/2932-41-0x0000000000220000-0x0000000000230000-memory.dmp

    Filesize

    64KB

  • memory/2932-45-0x0000000000220000-0x0000000000230000-memory.dmp

    Filesize

    64KB

  • memory/2932-11-0x0000000000080000-0x0000000000095000-memory.dmp

    Filesize

    84KB

  • memory/2932-10-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

    Filesize

    4KB

  • memory/2932-8-0x0000000000080000-0x0000000000095000-memory.dmp

    Filesize

    84KB

  • memory/2932-23-0x00000000018D0000-0x0000000001ADF000-memory.dmp

    Filesize

    2.1MB

  • memory/2932-30-0x0000000000220000-0x0000000000230000-memory.dmp

    Filesize

    64KB

  • memory/2932-32-0x0000000000220000-0x0000000000230000-memory.dmp

    Filesize

    64KB

  • memory/2932-17-0x0000000000080000-0x0000000000095000-memory.dmp

    Filesize

    84KB

  • memory/2932-18-0x0000000000080000-0x0000000000095000-memory.dmp

    Filesize

    84KB

  • memory/2932-27-0x0000000000220000-0x0000000000230000-memory.dmp

    Filesize

    64KB

  • memory/2932-20-0x00000000018D0000-0x0000000001ADF000-memory.dmp

    Filesize

    2.1MB

  • memory/2932-24-0x0000000000190000-0x0000000000196000-memory.dmp

    Filesize

    24KB

  • memory/2932-31-0x0000000000220000-0x0000000000230000-memory.dmp

    Filesize

    64KB

  • memory/2932-36-0x0000000000220000-0x0000000000230000-memory.dmp

    Filesize

    64KB

  • memory/2932-34-0x0000000000220000-0x0000000000230000-memory.dmp

    Filesize

    64KB

  • memory/2932-55-0x00000000005F0000-0x00000000005F7000-memory.dmp

    Filesize

    28KB

  • memory/2932-51-0x00000000054C0000-0x00000000058CB000-memory.dmp

    Filesize

    4.0MB

  • memory/2932-38-0x0000000000220000-0x0000000000230000-memory.dmp

    Filesize

    64KB

  • memory/2932-50-0x0000000000300000-0x0000000000305000-memory.dmp

    Filesize

    20KB

  • memory/2932-47-0x0000000000300000-0x0000000000305000-memory.dmp

    Filesize

    20KB

  • memory/2932-46-0x0000000000220000-0x0000000000230000-memory.dmp

    Filesize

    64KB

  • memory/2932-44-0x0000000000220000-0x0000000000230000-memory.dmp

    Filesize

    64KB

  • memory/2932-43-0x0000000000220000-0x0000000000230000-memory.dmp

    Filesize

    64KB

  • memory/2932-42-0x0000000000220000-0x0000000000230000-memory.dmp

    Filesize

    64KB

  • memory/2932-33-0x0000000000220000-0x0000000000230000-memory.dmp

    Filesize

    64KB

  • memory/2932-40-0x0000000000220000-0x0000000000230000-memory.dmp

    Filesize

    64KB

  • memory/2932-39-0x0000000000220000-0x0000000000230000-memory.dmp

    Filesize

    64KB

  • memory/2932-54-0x00000000054C0000-0x00000000058CB000-memory.dmp

    Filesize

    4.0MB

  • memory/2932-37-0x0000000000220000-0x0000000000230000-memory.dmp

    Filesize

    64KB

  • memory/2932-35-0x0000000000220000-0x0000000000230000-memory.dmp

    Filesize

    64KB

  • memory/2980-4-0x0000000000400000-0x00000000005FE000-memory.dmp

    Filesize

    2.0MB

  • memory/2980-1-0x0000000000A40000-0x0000000000B40000-memory.dmp

    Filesize

    1024KB

  • memory/2980-15-0x0000000000400000-0x00000000005FE000-memory.dmp

    Filesize

    2.0MB

  • memory/2980-16-0x0000000000400000-0x0000000000415000-memory.dmp

    Filesize

    84KB

  • memory/2980-2-0x0000000000400000-0x0000000000415000-memory.dmp

    Filesize

    84KB