Analysis

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

    arch:x64arch:x86image:win7-20240708-enlocale:en-usos:windows7-x64system
  • submitted
    16-12-2024 16:40

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
  • 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\d490f432985a964e5442320f634b2cfd3aff7f32df02001abb308b7592b6a58b.exe
    "C:\Users\Admin\AppData\Local\Temp\d490f432985a964e5442320f634b2cfd3aff7f32df02001abb308b7592b6a58b.exe"
    1⤵
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2916
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\pnirpgmj\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:2148
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\pvletdrg.exe" C:\Windows\SysWOW64\pnirpgmj\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:2752
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" create pnirpgmj binPath= "C:\Windows\SysWOW64\pnirpgmj\pvletdrg.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:2944
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" description pnirpgmj "wifi internet conection"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:2828
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" start pnirpgmj
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:2644
    • 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:2724
  • C:\Windows\SysWOW64\pnirpgmj\pvletdrg.exe
    C:\Windows\SysWOW64\pnirpgmj\pvletdrg.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:2580
    • 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:2680

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads

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

    Filesize

    11.1MB

    MD5

    c035da33c28223f6ded3ab30f3a940c8

    SHA1

    e004dc11abbecd09b665fabc4ecf02a73c5f4399

    SHA256

    0bf713e102a6d850c3b511645d157a0f011f6467852f90be5e4cbd24d95672a1

    SHA512

    bc8f0ad66dbd863a1bbc2e9af3aa1d321334efee9d285ed4b26f13dd90cf975865f01bc33db20ead0fd2809c0adc14a3bfdd6bcb97552735402f846eecce2346

  • memory/2580-17-0x0000000000400000-0x000000000081A000-memory.dmp

    Filesize

    4.1MB

  • memory/2680-43-0x0000000000330000-0x0000000000340000-memory.dmp

    Filesize

    64KB

  • memory/2680-50-0x00000000004C0000-0x00000000004C5000-memory.dmp

    Filesize

    20KB

  • memory/2680-47-0x00000000004C0000-0x00000000004C5000-memory.dmp

    Filesize

    20KB

  • memory/2680-41-0x0000000000330000-0x0000000000340000-memory.dmp

    Filesize

    64KB

  • memory/2680-40-0x0000000000330000-0x0000000000340000-memory.dmp

    Filesize

    64KB

  • memory/2680-14-0x00000000000C0000-0x00000000000D5000-memory.dmp

    Filesize

    84KB

  • memory/2680-13-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

    Filesize

    4KB

  • memory/2680-11-0x00000000000C0000-0x00000000000D5000-memory.dmp

    Filesize

    84KB

  • memory/2680-16-0x00000000000C0000-0x00000000000D5000-memory.dmp

    Filesize

    84KB

  • memory/2680-51-0x0000000005400000-0x000000000580B000-memory.dmp

    Filesize

    4.0MB

  • memory/2680-18-0x00000000000C0000-0x00000000000D5000-memory.dmp

    Filesize

    84KB

  • memory/2680-20-0x0000000001900000-0x0000000001B0F000-memory.dmp

    Filesize

    2.1MB

  • memory/2680-27-0x0000000000330000-0x0000000000340000-memory.dmp

    Filesize

    64KB

  • memory/2680-46-0x0000000000330000-0x0000000000340000-memory.dmp

    Filesize

    64KB

  • memory/2680-45-0x0000000000330000-0x0000000000340000-memory.dmp

    Filesize

    64KB

  • memory/2680-44-0x0000000000330000-0x0000000000340000-memory.dmp

    Filesize

    64KB

  • memory/2680-54-0x0000000005400000-0x000000000580B000-memory.dmp

    Filesize

    4.0MB

  • memory/2680-42-0x0000000000330000-0x0000000000340000-memory.dmp

    Filesize

    64KB

  • memory/2680-55-0x0000000000760000-0x0000000000767000-memory.dmp

    Filesize

    28KB

  • memory/2680-23-0x0000000001900000-0x0000000001B0F000-memory.dmp

    Filesize

    2.1MB

  • memory/2680-38-0x0000000000330000-0x0000000000340000-memory.dmp

    Filesize

    64KB

  • memory/2680-39-0x0000000000330000-0x0000000000340000-memory.dmp

    Filesize

    64KB

  • memory/2680-37-0x0000000000330000-0x0000000000340000-memory.dmp

    Filesize

    64KB

  • memory/2680-36-0x0000000000330000-0x0000000000340000-memory.dmp

    Filesize

    64KB

  • memory/2680-35-0x0000000000330000-0x0000000000340000-memory.dmp

    Filesize

    64KB

  • memory/2680-34-0x0000000000330000-0x0000000000340000-memory.dmp

    Filesize

    64KB

  • memory/2680-33-0x0000000000330000-0x0000000000340000-memory.dmp

    Filesize

    64KB

  • memory/2680-32-0x0000000000330000-0x0000000000340000-memory.dmp

    Filesize

    64KB

  • memory/2680-31-0x0000000000330000-0x0000000000340000-memory.dmp

    Filesize

    64KB

  • memory/2680-30-0x0000000000330000-0x0000000000340000-memory.dmp

    Filesize

    64KB

  • memory/2680-24-0x00000000001A0000-0x00000000001A6000-memory.dmp

    Filesize

    24KB

  • memory/2916-3-0x0000000000400000-0x0000000000415000-memory.dmp

    Filesize

    84KB

  • memory/2916-8-0x00000000001B0000-0x00000000001C3000-memory.dmp

    Filesize

    76KB

  • memory/2916-1-0x0000000000290000-0x0000000000390000-memory.dmp

    Filesize

    1024KB

  • memory/2916-2-0x00000000001B0000-0x00000000001C3000-memory.dmp

    Filesize

    76KB

  • memory/2916-7-0x0000000000400000-0x000000000081A000-memory.dmp

    Filesize

    4.1MB

  • memory/2916-9-0x0000000000400000-0x0000000000415000-memory.dmp

    Filesize

    84KB