Analysis

  • max time kernel
    149s
  • max time network
    151s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240802-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
  • submitted
    08-09-2024 01:28

General

  • Target

    ae30f8849f76c8517dbb9922a570efd8b2a502292df7f768bfdeebab92aa52ba.exe

  • Size

    71KB

  • MD5

    26ebbf2fff571c90b3af42785d65db3a

  • SHA1

    20ddf85b7a5d92dd7e41fd22237556460f56e98b

  • SHA256

    ae30f8849f76c8517dbb9922a570efd8b2a502292df7f768bfdeebab92aa52ba

  • SHA512

    71b444041b967a33a89cf6c31090e86045f5f683dc577d1eae2696cbdae569e70a061968c1f9ba36d9515be14e2369020c74a2ea2ed2798a77778dfc06c050d9

  • SSDEEP

    1536:Dkes21VCy1nTxSYg3CXTjFWL9SdpIHUc:DDVCyFxSYACXF/pI0

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
  • Looks up external IP address via web service 1 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.

  • 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\ae30f8849f76c8517dbb9922a570efd8b2a502292df7f768bfdeebab92aa52ba.exe
    "C:\Users\Admin\AppData\Local\Temp\ae30f8849f76c8517dbb9922a570efd8b2a502292df7f768bfdeebab92aa52ba.exe"
    1⤵
    • Checks computer location settings
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:3984
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\ktqptide\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:2644
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\mbtafdia.exe" C:\Windows\SysWOW64\ktqptide\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:4744
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" create ktqptide binPath= "C:\Windows\SysWOW64\ktqptide\mbtafdia.exe /d\"C:\Users\Admin\AppData\Local\Temp\ae30f8849f76c8517dbb9922a570efd8b2a502292df7f768bfdeebab92aa52ba.exe\"" type= own start= auto DisplayName= "wifi support"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:5584
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" description ktqptide "wifi internet conection"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:6020
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" start ktqptide
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:4280
    • 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:5840
  • C:\Windows\SysWOW64\ktqptide\mbtafdia.exe
    C:\Windows\SysWOW64\ktqptide\mbtafdia.exe /d"C:\Users\Admin\AppData\Local\Temp\ae30f8849f76c8517dbb9922a570efd8b2a502292df7f768bfdeebab92aa52ba.exe"
    1⤵
    • Executes dropped EXE
    • Suspicious use of SetThreadContext
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:5932
    • 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:5852

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    10.2MB

    MD5

    d5dc78b240ebe09e49ee66864c7a0d56

    SHA1

    57e5ec991faff013c39bc5807a3fa025cc28e912

    SHA256

    b25b30e4f8182d0ae6cf97bbf3ec6170d6cf669fe04075a48c7195eafb7c5558

    SHA512

    b62843feff84dcb1dc83da843b48c3530d8c3fd159b5e30c089d5f8e1f569071b1ac78f8e2869461981c6389ceb432b78af93382d6101958658ace2f6b56cef6

  • memory/5852-3-0x0000000000B40000-0x0000000000B55000-memory.dmp

    Filesize

    84KB

  • memory/5852-6-0x0000000000B40000-0x0000000000B55000-memory.dmp

    Filesize

    84KB

  • memory/5852-7-0x0000000000B40000-0x0000000000B55000-memory.dmp

    Filesize

    84KB

  • memory/5852-8-0x0000000000B40000-0x0000000000B55000-memory.dmp

    Filesize

    84KB

  • memory/5852-10-0x0000000000B40000-0x0000000000B55000-memory.dmp

    Filesize

    84KB

  • memory/5852-34-0x0000000002C20000-0x0000000002C30000-memory.dmp

    Filesize

    64KB

  • memory/5852-46-0x0000000007E50000-0x0000000007E57000-memory.dmp

    Filesize

    28KB

  • memory/5852-42-0x0000000007900000-0x0000000007D0B000-memory.dmp

    Filesize

    4.0MB

  • memory/5852-41-0x0000000002DF0000-0x0000000002DF5000-memory.dmp

    Filesize

    20KB

  • memory/5852-38-0x0000000002DF0000-0x0000000002DF5000-memory.dmp

    Filesize

    20KB

  • memory/5852-37-0x0000000002C20000-0x0000000002C30000-memory.dmp

    Filesize

    64KB

  • memory/5852-36-0x0000000002C20000-0x0000000002C30000-memory.dmp

    Filesize

    64KB

  • memory/5852-35-0x0000000002C20000-0x0000000002C30000-memory.dmp

    Filesize

    64KB

  • memory/5852-33-0x0000000002C20000-0x0000000002C30000-memory.dmp

    Filesize

    64KB

  • memory/5852-32-0x0000000002C20000-0x0000000002C30000-memory.dmp

    Filesize

    64KB

  • memory/5852-31-0x0000000002C20000-0x0000000002C30000-memory.dmp

    Filesize

    64KB

  • memory/5852-30-0x0000000002C20000-0x0000000002C30000-memory.dmp

    Filesize

    64KB

  • memory/5852-29-0x0000000002C20000-0x0000000002C30000-memory.dmp

    Filesize

    64KB

  • memory/5852-28-0x0000000002C20000-0x0000000002C30000-memory.dmp

    Filesize

    64KB

  • memory/5852-27-0x0000000002C20000-0x0000000002C30000-memory.dmp

    Filesize

    64KB

  • memory/5852-26-0x0000000002C20000-0x0000000002C30000-memory.dmp

    Filesize

    64KB

  • memory/5852-25-0x0000000002C20000-0x0000000002C30000-memory.dmp

    Filesize

    64KB

  • memory/5852-24-0x0000000002C20000-0x0000000002C30000-memory.dmp

    Filesize

    64KB

  • memory/5852-23-0x0000000002C20000-0x0000000002C30000-memory.dmp

    Filesize

    64KB

  • memory/5852-21-0x0000000002C20000-0x0000000002C30000-memory.dmp

    Filesize

    64KB

  • memory/5852-18-0x0000000002C20000-0x0000000002C30000-memory.dmp

    Filesize

    64KB

  • memory/5852-15-0x0000000002C10000-0x0000000002C16000-memory.dmp

    Filesize

    24KB

  • memory/5852-45-0x0000000007900000-0x0000000007D0B000-memory.dmp

    Filesize

    4.0MB

  • memory/5852-14-0x0000000002A00000-0x0000000002C0F000-memory.dmp

    Filesize

    2.1MB

  • memory/5852-22-0x0000000002C20000-0x0000000002C30000-memory.dmp

    Filesize

    64KB

  • memory/5852-12-0x0000000002A00000-0x0000000002C0F000-memory.dmp

    Filesize

    2.1MB