Analysis

  • max time kernel
    146s
  • max time network
    149s
  • platform
    windows7_x64
  • resource
    win7-20240708-en
  • resource tags

    arch:x64arch:x86image:win7-20240708-enlocale:en-usos:windows7-x64system
  • submitted
    11-10-2024 14:35

General

  • Target

    e4352f63724267bed81e8c199bd8ca0f.exe

  • Size

    416KB

  • MD5

    e4352f63724267bed81e8c199bd8ca0f

  • SHA1

    ce9c69ca36920f076fe1369be4d9001085ca8602

  • SHA256

    5ffda142aa321a2b5546c426a28403d7f19b51b88985c8617f11c04411489e30

  • SHA512

    afe8786dade10b520aeee40fc661d0f86b370e2c0272be3a462033cdc4b9cf91ddf8a2f2f6628c478da8736dbd7704d8da3b577c5afeb053db79dad1556c8bc4

  • SSDEEP

    3072://IcJg7uMwZi9VaiI2PLP7zIyMDWVYvVtKHpA6PYYNp/GG7Ig7LRACfij5+U/p49:HH0uMvGiI2PLgW4upRfJGuLmHsU

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 8 IoCs
  • Suspicious use of WriteProcessMemory 30 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\e4352f63724267bed81e8c199bd8ca0f.exe
    "C:\Users\Admin\AppData\Local\Temp\e4352f63724267bed81e8c199bd8ca0f.exe"
    1⤵
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2300
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\bcomihhr\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:1688
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\bgjtbhyx.exe" C:\Windows\SysWOW64\bcomihhr\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:552
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" create bcomihhr binPath= "C:\Windows\SysWOW64\bcomihhr\bgjtbhyx.exe /d\"C:\Users\Admin\AppData\Local\Temp\e4352f63724267bed81e8c199bd8ca0f.exe\"" type= own start= auto DisplayName= "wifi support"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:276
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" description bcomihhr "wifi internet conection"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:2420
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" start bcomihhr
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:2756
    • 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:1708
  • C:\Windows\SysWOW64\bcomihhr\bgjtbhyx.exe
    C:\Windows\SysWOW64\bcomihhr\bgjtbhyx.exe /d"C:\Users\Admin\AppData\Local\Temp\e4352f63724267bed81e8c199bd8ca0f.exe"
    1⤵
    • Executes dropped EXE
    • Suspicious use of SetThreadContext
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:268
    • 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:2824

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    13.6MB

    MD5

    f2788bc3c6dee320082cd3552194f8b4

    SHA1

    3a1b6761351993edcf01c5891ae7f18abf79111b

    SHA256

    131064f1bf300c71ac5a0ad332f5e4a407049d5765bb941378e567b86d3a596c

    SHA512

    33a9fd4e4c4a6e3c6963d2dba053cf5980075cc5cd7c0792e5e5f84a74e3abd621eb4e2b06d79bdc4a9ef324cb50b1d65f953f305f5d69a5df01a95745b77082

  • memory/268-12-0x0000000000400000-0x0000000000477000-memory.dmp

    Filesize

    476KB

  • memory/2300-14-0x0000000000400000-0x0000000000477000-memory.dmp

    Filesize

    476KB

  • memory/2300-2-0x0000000000220000-0x0000000000233000-memory.dmp

    Filesize

    76KB

  • memory/2300-3-0x0000000000400000-0x0000000000415000-memory.dmp

    Filesize

    84KB

  • memory/2300-1-0x00000000005F0000-0x00000000006F0000-memory.dmp

    Filesize

    1024KB

  • memory/2300-15-0x0000000000220000-0x0000000000233000-memory.dmp

    Filesize

    76KB

  • memory/2300-16-0x0000000000400000-0x0000000000415000-memory.dmp

    Filesize

    84KB

  • memory/2824-47-0x0000000000270000-0x0000000000275000-memory.dmp

    Filesize

    20KB

  • memory/2824-41-0x0000000000260000-0x0000000000270000-memory.dmp

    Filesize

    64KB

  • memory/2824-10-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

    Filesize

    4KB

  • memory/2824-17-0x0000000000080000-0x0000000000095000-memory.dmp

    Filesize

    84KB

  • memory/2824-18-0x0000000000080000-0x0000000000095000-memory.dmp

    Filesize

    84KB

  • memory/2824-20-0x0000000001AB0000-0x0000000001CBF000-memory.dmp

    Filesize

    2.1MB

  • memory/2824-23-0x0000000001AB0000-0x0000000001CBF000-memory.dmp

    Filesize

    2.1MB

  • memory/2824-27-0x0000000000260000-0x0000000000270000-memory.dmp

    Filesize

    64KB

  • memory/2824-43-0x0000000000260000-0x0000000000270000-memory.dmp

    Filesize

    64KB

  • memory/2824-50-0x0000000000270000-0x0000000000275000-memory.dmp

    Filesize

    20KB

  • memory/2824-11-0x0000000000080000-0x0000000000095000-memory.dmp

    Filesize

    84KB

  • memory/2824-46-0x0000000000260000-0x0000000000270000-memory.dmp

    Filesize

    64KB

  • memory/2824-45-0x0000000000260000-0x0000000000270000-memory.dmp

    Filesize

    64KB

  • memory/2824-44-0x0000000000260000-0x0000000000270000-memory.dmp

    Filesize

    64KB

  • memory/2824-42-0x0000000000260000-0x0000000000270000-memory.dmp

    Filesize

    64KB

  • memory/2824-8-0x0000000000080000-0x0000000000095000-memory.dmp

    Filesize

    84KB

  • memory/2824-40-0x0000000000260000-0x0000000000270000-memory.dmp

    Filesize

    64KB

  • memory/2824-39-0x0000000000260000-0x0000000000270000-memory.dmp

    Filesize

    64KB

  • memory/2824-38-0x0000000000260000-0x0000000000270000-memory.dmp

    Filesize

    64KB

  • memory/2824-37-0x0000000000260000-0x0000000000270000-memory.dmp

    Filesize

    64KB

  • memory/2824-36-0x0000000000260000-0x0000000000270000-memory.dmp

    Filesize

    64KB

  • memory/2824-35-0x0000000000260000-0x0000000000270000-memory.dmp

    Filesize

    64KB

  • memory/2824-34-0x0000000000260000-0x0000000000270000-memory.dmp

    Filesize

    64KB

  • memory/2824-33-0x0000000000260000-0x0000000000270000-memory.dmp

    Filesize

    64KB

  • memory/2824-32-0x0000000000260000-0x0000000000270000-memory.dmp

    Filesize

    64KB

  • memory/2824-31-0x0000000000260000-0x0000000000270000-memory.dmp

    Filesize

    64KB

  • memory/2824-30-0x0000000000260000-0x0000000000270000-memory.dmp

    Filesize

    64KB

  • memory/2824-24-0x0000000000250000-0x0000000000256000-memory.dmp

    Filesize

    24KB

  • memory/2824-54-0x00000000055A0000-0x00000000059AB000-memory.dmp

    Filesize

    4.0MB

  • memory/2824-55-0x0000000000480000-0x0000000000487000-memory.dmp

    Filesize

    28KB

  • memory/2824-51-0x00000000055A0000-0x00000000059AB000-memory.dmp

    Filesize

    4.0MB