Analysis

  • max time kernel
    147s
  • max time network
    153s
  • platform
    windows7_x64
  • resource
    win7-20240903-en
  • resource tags

    arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
  • submitted
    24-09-2024 04:33

General

  • Target

    ad47fc74baa9ccd6f9b004a990b27393eba378eff2dcc7e2de3ce2b95501c7f4.exe

  • Size

    14.1MB

  • MD5

    82af93e89cf7525040978c5a5815c123

  • SHA1

    47193983774a29f19ada610751133ed5779915ac

  • SHA256

    ad47fc74baa9ccd6f9b004a990b27393eba378eff2dcc7e2de3ce2b95501c7f4

  • SHA512

    08cfb9037aa05269f7303ddbdc522889b5486295d6a8445edc485f39d800eca682c202edf58350eb08d8b0e84c7232c6c2f94698f5951eab402c92f3d5b06d06

  • SSDEEP

    24576:0sPvIp7DpbpbpbpbpbpbpbpbpbpbpbpbpbpbpbpbpbpbpbpbpbpbpbpbpbpbpbpJ:lvY7

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 6 IoCs
  • Suspicious use of WriteProcessMemory 30 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\ad47fc74baa9ccd6f9b004a990b27393eba378eff2dcc7e2de3ce2b95501c7f4.exe
    "C:\Users\Admin\AppData\Local\Temp\ad47fc74baa9ccd6f9b004a990b27393eba378eff2dcc7e2de3ce2b95501c7f4.exe"
    1⤵
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:1756
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\uayvnbq\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:1560
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\rgyfkinf.exe" C:\Windows\SysWOW64\uayvnbq\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:2232
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" create uayvnbq binPath= "C:\Windows\SysWOW64\uayvnbq\rgyfkinf.exe /d\"C:\Users\Admin\AppData\Local\Temp\ad47fc74baa9ccd6f9b004a990b27393eba378eff2dcc7e2de3ce2b95501c7f4.exe\"" type= own start= auto DisplayName= "wifi support"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:2820
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" description uayvnbq "wifi internet conection"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:1096
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" start uayvnbq
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:2740
    • 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:2696
  • C:\Windows\SysWOW64\uayvnbq\rgyfkinf.exe
    C:\Windows\SysWOW64\uayvnbq\rgyfkinf.exe /d"C:\Users\Admin\AppData\Local\Temp\ad47fc74baa9ccd6f9b004a990b27393eba378eff2dcc7e2de3ce2b95501c7f4.exe"
    1⤵
    • Executes dropped EXE
    • Suspicious use of SetThreadContext
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2768
    • 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:2900

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    11.8MB

    MD5

    61e4ab785de91beff449444de7fe406f

    SHA1

    885fedd15662cefc810f743f0e8f60f67e93f067

    SHA256

    2672883aab3f5852fe885bfd1dae04c17b02fc5b7473b4a07ca9b9cda6e0a266

    SHA512

    ad35f668eace75e2a6c89182b7038251ebc49b7feaa75e124fb38f6ae6f64c8811cf5a64c432650e333c6d6bc6376458b4d58ff887ef7ed597a4ddf50bfdeae6

  • memory/1756-1-0x0000000000780000-0x0000000000880000-memory.dmp

    Filesize

    1024KB

  • memory/1756-3-0x0000000000400000-0x0000000000415000-memory.dmp

    Filesize

    84KB

  • memory/1756-7-0x0000000000400000-0x0000000000683000-memory.dmp

    Filesize

    2.5MB

  • memory/1756-9-0x0000000000400000-0x0000000000415000-memory.dmp

    Filesize

    84KB

  • memory/1756-8-0x0000000000220000-0x0000000000233000-memory.dmp

    Filesize

    76KB

  • memory/1756-2-0x0000000000220000-0x0000000000233000-memory.dmp

    Filesize

    76KB

  • memory/2768-15-0x0000000000400000-0x0000000000683000-memory.dmp

    Filesize

    2.5MB

  • memory/2900-51-0x0000000005520000-0x000000000592B000-memory.dmp

    Filesize

    4.0MB

  • memory/2900-46-0x00000000000F0000-0x0000000000100000-memory.dmp

    Filesize

    64KB

  • memory/2900-17-0x00000000000C0000-0x00000000000D5000-memory.dmp

    Filesize

    84KB

  • memory/2900-13-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

    Filesize

    4KB

  • memory/2900-18-0x00000000000C0000-0x00000000000D5000-memory.dmp

    Filesize

    84KB

  • memory/2900-20-0x0000000001830000-0x0000000001A3F000-memory.dmp

    Filesize

    2.1MB

  • memory/2900-23-0x0000000001830000-0x0000000001A3F000-memory.dmp

    Filesize

    2.1MB

  • memory/2900-30-0x00000000000F0000-0x0000000000100000-memory.dmp

    Filesize

    64KB

  • memory/2900-27-0x00000000000F0000-0x0000000000100000-memory.dmp

    Filesize

    64KB

  • memory/2900-38-0x00000000000F0000-0x0000000000100000-memory.dmp

    Filesize

    64KB

  • memory/2900-11-0x00000000000C0000-0x00000000000D5000-memory.dmp

    Filesize

    84KB

  • memory/2900-55-0x0000000000250000-0x0000000000257000-memory.dmp

    Filesize

    28KB

  • memory/2900-54-0x0000000005520000-0x000000000592B000-memory.dmp

    Filesize

    4.0MB

  • memory/2900-50-0x00000000001C0000-0x00000000001C5000-memory.dmp

    Filesize

    20KB

  • memory/2900-47-0x00000000001C0000-0x00000000001C5000-memory.dmp

    Filesize

    20KB

  • memory/2900-14-0x00000000000C0000-0x00000000000D5000-memory.dmp

    Filesize

    84KB

  • memory/2900-45-0x00000000000F0000-0x0000000000100000-memory.dmp

    Filesize

    64KB

  • memory/2900-44-0x00000000000F0000-0x0000000000100000-memory.dmp

    Filesize

    64KB

  • memory/2900-43-0x00000000000F0000-0x0000000000100000-memory.dmp

    Filesize

    64KB

  • memory/2900-42-0x00000000000F0000-0x0000000000100000-memory.dmp

    Filesize

    64KB

  • memory/2900-41-0x00000000000F0000-0x0000000000100000-memory.dmp

    Filesize

    64KB

  • memory/2900-40-0x00000000000F0000-0x0000000000100000-memory.dmp

    Filesize

    64KB

  • memory/2900-39-0x00000000000F0000-0x0000000000100000-memory.dmp

    Filesize

    64KB

  • memory/2900-37-0x00000000000F0000-0x0000000000100000-memory.dmp

    Filesize

    64KB

  • memory/2900-36-0x00000000000F0000-0x0000000000100000-memory.dmp

    Filesize

    64KB

  • memory/2900-35-0x00000000000F0000-0x0000000000100000-memory.dmp

    Filesize

    64KB

  • memory/2900-34-0x00000000000F0000-0x0000000000100000-memory.dmp

    Filesize

    64KB

  • memory/2900-33-0x00000000000F0000-0x0000000000100000-memory.dmp

    Filesize

    64KB

  • memory/2900-32-0x00000000000F0000-0x0000000000100000-memory.dmp

    Filesize

    64KB

  • memory/2900-31-0x00000000000F0000-0x0000000000100000-memory.dmp

    Filesize

    64KB

  • memory/2900-24-0x00000000000E0000-0x00000000000E6000-memory.dmp

    Filesize

    24KB