Analysis

  • max time kernel
    143s
  • max time network
    144s
  • platform
    windows7_x64
  • resource
    win7-20240729-en
  • resource tags

    arch:x64arch:x86image:win7-20240729-enlocale:en-usos:windows7-x64system
  • submitted
    03-09-2024 07:13

General

  • Target

    rdmazvej.exe

  • Size

    11.3MB

  • MD5

    b6908bd53df503767bfc98eb0b281382

  • SHA1

    0a2aaa2ad62972b3f0f73c8ef06c61fefe2c2119

  • SHA256

    27a2ca5daecccc99348be56dc60c72643b9c36eb3fc3f09b517893b157dd314c

  • SHA512

    5197ff588c0ec36150b1ae1dcd337c2848e568d4449b8f7f2d827ac30ad0bf8140a0bb68682bbde55eeb2a889eb07e14013f2302ab88cd72c2099c5d150d1cfe

  • SSDEEP

    6144:2w0VDy74AW/47pwSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSn:2w0VD7AW/49

Malware Config

Extracted

Family

tofsee

C2

svartalfheim.top

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\rdmazvej.exe
    "C:\Users\Admin\AppData\Local\Temp\rdmazvej.exe"
    1⤵
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2420
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\hefqnxyw\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:580
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\aqsfwoz.exe" C:\Windows\SysWOW64\hefqnxyw\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:2856
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" create hefqnxyw binPath= "C:\Windows\SysWOW64\hefqnxyw\aqsfwoz.exe /d\"C:\Users\Admin\AppData\Local\Temp\rdmazvej.exe\"" type= own start= auto DisplayName= "wifi support"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:2984
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" description hefqnxyw "wifi internet conection"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:2768
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" start hefqnxyw
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:1528
    • 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:2880
  • C:\Windows\SysWOW64\hefqnxyw\aqsfwoz.exe
    C:\Windows\SysWOW64\hefqnxyw\aqsfwoz.exe /d"C:\Users\Admin\AppData\Local\Temp\rdmazvej.exe"
    1⤵
    • Executes dropped EXE
    • Suspicious use of SetThreadContext
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2820
    • 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:2656

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads

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

    Filesize

    11.8MB

    MD5

    07f1415abcdb3eb7169afb3d85d9dae5

    SHA1

    b44b0e5a810ce27106fb31a4f955210210c53929

    SHA256

    256663a3854aa83f75a6ead0fdf1668833e9abe83a863f09544b7a7e71764414

    SHA512

    6bf34ded56adba5af36256039e69f0157c344b99dbb4689325b6e55c4f1172a70fda4c7adcb2c908e402f91145722207aa01551dde93121289ccb49d2c48f447

  • memory/2420-1-0x0000000000510000-0x0000000000610000-memory.dmp

    Filesize

    1024KB

  • memory/2420-2-0x0000000000220000-0x0000000000233000-memory.dmp

    Filesize

    76KB

  • memory/2420-3-0x0000000000400000-0x0000000000415000-memory.dmp

    Filesize

    84KB

  • memory/2420-9-0x0000000000400000-0x0000000000415000-memory.dmp

    Filesize

    84KB

  • memory/2420-8-0x0000000000220000-0x0000000000233000-memory.dmp

    Filesize

    76KB

  • memory/2420-7-0x0000000000400000-0x000000000045A000-memory.dmp

    Filesize

    360KB

  • memory/2656-35-0x00000000001F0000-0x0000000000200000-memory.dmp

    Filesize

    64KB

  • memory/2656-40-0x00000000001F0000-0x0000000000200000-memory.dmp

    Filesize

    64KB

  • memory/2656-51-0x00000000056B0000-0x0000000005ABB000-memory.dmp

    Filesize

    4.0MB

  • memory/2656-13-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

    Filesize

    4KB

  • memory/2656-11-0x0000000000080000-0x0000000000095000-memory.dmp

    Filesize

    84KB

  • memory/2656-18-0x0000000000080000-0x0000000000095000-memory.dmp

    Filesize

    84KB

  • memory/2656-20-0x0000000001CA0000-0x0000000001EAF000-memory.dmp

    Filesize

    2.1MB

  • memory/2656-50-0x0000000000200000-0x0000000000205000-memory.dmp

    Filesize

    20KB

  • memory/2656-47-0x0000000000200000-0x0000000000205000-memory.dmp

    Filesize

    20KB

  • memory/2656-46-0x00000000001F0000-0x0000000000200000-memory.dmp

    Filesize

    64KB

  • memory/2656-45-0x00000000001F0000-0x0000000000200000-memory.dmp

    Filesize

    64KB

  • memory/2656-44-0x00000000001F0000-0x0000000000200000-memory.dmp

    Filesize

    64KB

  • memory/2656-43-0x00000000001F0000-0x0000000000200000-memory.dmp

    Filesize

    64KB

  • memory/2656-42-0x00000000001F0000-0x0000000000200000-memory.dmp

    Filesize

    64KB

  • memory/2656-41-0x00000000001F0000-0x0000000000200000-memory.dmp

    Filesize

    64KB

  • memory/2656-14-0x0000000000080000-0x0000000000095000-memory.dmp

    Filesize

    84KB

  • memory/2656-39-0x00000000001F0000-0x0000000000200000-memory.dmp

    Filesize

    64KB

  • memory/2656-38-0x00000000001F0000-0x0000000000200000-memory.dmp

    Filesize

    64KB

  • memory/2656-37-0x00000000001F0000-0x0000000000200000-memory.dmp

    Filesize

    64KB

  • memory/2656-36-0x00000000001F0000-0x0000000000200000-memory.dmp

    Filesize

    64KB

  • memory/2656-16-0x0000000000080000-0x0000000000095000-memory.dmp

    Filesize

    84KB

  • memory/2656-34-0x00000000001F0000-0x0000000000200000-memory.dmp

    Filesize

    64KB

  • memory/2656-33-0x00000000001F0000-0x0000000000200000-memory.dmp

    Filesize

    64KB

  • memory/2656-32-0x00000000001F0000-0x0000000000200000-memory.dmp

    Filesize

    64KB

  • memory/2656-31-0x00000000001F0000-0x0000000000200000-memory.dmp

    Filesize

    64KB

  • memory/2656-30-0x00000000001F0000-0x0000000000200000-memory.dmp

    Filesize

    64KB

  • memory/2656-27-0x00000000001F0000-0x0000000000200000-memory.dmp

    Filesize

    64KB

  • memory/2656-24-0x00000000001A0000-0x00000000001A6000-memory.dmp

    Filesize

    24KB

  • memory/2656-23-0x0000000001CA0000-0x0000000001EAF000-memory.dmp

    Filesize

    2.1MB

  • memory/2656-55-0x0000000000250000-0x0000000000257000-memory.dmp

    Filesize

    28KB

  • memory/2656-54-0x00000000056B0000-0x0000000005ABB000-memory.dmp

    Filesize

    4.0MB

  • memory/2820-17-0x0000000000400000-0x000000000045A000-memory.dmp

    Filesize

    360KB