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
    06/09/2024, 06:06

General

  • Target

    9e08c4e34c5358916c1f360f4c82efc4d7bd77d587cda899691a49c3dffb1bc6.exe

  • Size

    213KB

  • MD5

    969450e69a3e85413b63c73abb733bdd

  • SHA1

    b506ca717ff22a749bf6e173a7d02b577564ce27

  • SHA256

    9e08c4e34c5358916c1f360f4c82efc4d7bd77d587cda899691a49c3dffb1bc6

  • SHA512

    8df1b276ff7f5cb67818ccc47158e3ba06f303e6da9aae1e0526c7537cb80d8a59e73e7aca80bd2cd0471a31a1dde49f7e96f05887ca66f9439b460ea3bda858

  • SSDEEP

    6144:PcDXnqPnz58kFjno63Fe/MMQm0Vdh1GQ:PsXq/z5V1nfFxjVdz

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.

  • 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 7 IoCs
  • Suspicious use of WriteProcessMemory 23 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\9e08c4e34c5358916c1f360f4c82efc4d7bd77d587cda899691a49c3dffb1bc6.exe
    "C:\Users\Admin\AppData\Local\Temp\9e08c4e34c5358916c1f360f4c82efc4d7bd77d587cda899691a49c3dffb1bc6.exe"
    1⤵
    • Checks computer location settings
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2268
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\sarupgxo\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:2380
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\lxnaonfj.exe" C:\Windows\SysWOW64\sarupgxo\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:2916
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" create sarupgxo binPath= "C:\Windows\SysWOW64\sarupgxo\lxnaonfj.exe /d\"C:\Users\Admin\AppData\Local\Temp\9e08c4e34c5358916c1f360f4c82efc4d7bd77d587cda899691a49c3dffb1bc6.exe\"" type= own start= auto DisplayName= "wifi support"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:3260
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" description sarupgxo "wifi internet conection"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:3984
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" start sarupgxo
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:736
    • 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:5092
  • C:\Windows\SysWOW64\sarupgxo\lxnaonfj.exe
    C:\Windows\SysWOW64\sarupgxo\lxnaonfj.exe /d"C:\Users\Admin\AppData\Local\Temp\9e08c4e34c5358916c1f360f4c82efc4d7bd77d587cda899691a49c3dffb1bc6.exe"
    1⤵
    • Executes dropped EXE
    • Suspicious use of SetThreadContext
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:472
    • C:\Windows\SysWOW64\svchost.exe
      svchost.exe
      2⤵
      • Sets service image path in registry
      • Drops file in System32 directory
      • System Location Discovery: System Language Discovery
      • Modifies data under HKEY_USERS
      PID:2516

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    13.4MB

    MD5

    6740a0335c1c57ad4b1b4e326e0d6d15

    SHA1

    063c8a50746d315f61297ea1a90c55d0857ec1f0

    SHA256

    847c4c87237ef06401b4b2b4aeb9640df25f004f2a9f579947ea33d91248a2e0

    SHA512

    900d5731e1db121445aba2fd0294acd65a89c9b42fde32f5514f2140b8d2caf3dc91b230345d55b79b9ec9041a9a942e7365f3cdaea4ca8ee684c2627a85ec26

  • memory/472-15-0x0000000000400000-0x000000000043C000-memory.dmp

    Filesize

    240KB

  • memory/472-11-0x0000000000400000-0x000000000043C000-memory.dmp

    Filesize

    240KB

  • memory/2268-2-0x0000000002050000-0x0000000002063000-memory.dmp

    Filesize

    76KB

  • memory/2268-4-0x0000000000400000-0x0000000000415000-memory.dmp

    Filesize

    84KB

  • memory/2268-7-0x00000000007B0000-0x00000000008B0000-memory.dmp

    Filesize

    1024KB

  • memory/2268-8-0x0000000000400000-0x000000000043C000-memory.dmp

    Filesize

    240KB

  • memory/2268-12-0x0000000000400000-0x0000000000415000-memory.dmp

    Filesize

    84KB

  • memory/2268-10-0x0000000002050000-0x0000000002063000-memory.dmp

    Filesize

    76KB

  • memory/2268-1-0x00000000007B0000-0x00000000008B0000-memory.dmp

    Filesize

    1024KB

  • memory/2516-56-0x0000000006F80000-0x000000000738B000-memory.dmp

    Filesize

    4.0MB

  • memory/2516-44-0x0000000001760000-0x0000000001770000-memory.dmp

    Filesize

    64KB

  • memory/2516-18-0x0000000000190000-0x00000000001A5000-memory.dmp

    Filesize

    84KB

  • memory/2516-26-0x0000000000540000-0x0000000000546000-memory.dmp

    Filesize

    24KB

  • memory/2516-25-0x0000000002000000-0x000000000220F000-memory.dmp

    Filesize

    2.1MB

  • memory/2516-22-0x0000000002000000-0x000000000220F000-memory.dmp

    Filesize

    2.1MB

  • memory/2516-53-0x0000000006F80000-0x000000000738B000-memory.dmp

    Filesize

    4.0MB

  • memory/2516-57-0x00000000025D0000-0x00000000025D7000-memory.dmp

    Filesize

    28KB

  • memory/2516-13-0x0000000000190000-0x00000000001A5000-memory.dmp

    Filesize

    84KB

  • memory/2516-52-0x00000000017F0000-0x00000000017F5000-memory.dmp

    Filesize

    20KB

  • memory/2516-49-0x00000000017F0000-0x00000000017F5000-memory.dmp

    Filesize

    20KB

  • memory/2516-48-0x0000000001760000-0x0000000001770000-memory.dmp

    Filesize

    64KB

  • memory/2516-47-0x0000000001760000-0x0000000001770000-memory.dmp

    Filesize

    64KB

  • memory/2516-46-0x0000000001760000-0x0000000001770000-memory.dmp

    Filesize

    64KB

  • memory/2516-45-0x0000000001760000-0x0000000001770000-memory.dmp

    Filesize

    64KB

  • memory/2516-17-0x0000000000190000-0x00000000001A5000-memory.dmp

    Filesize

    84KB

  • memory/2516-43-0x0000000001760000-0x0000000001770000-memory.dmp

    Filesize

    64KB

  • memory/2516-42-0x0000000001760000-0x0000000001770000-memory.dmp

    Filesize

    64KB

  • memory/2516-41-0x0000000001760000-0x0000000001770000-memory.dmp

    Filesize

    64KB

  • memory/2516-40-0x0000000001760000-0x0000000001770000-memory.dmp

    Filesize

    64KB

  • memory/2516-39-0x0000000001760000-0x0000000001770000-memory.dmp

    Filesize

    64KB

  • memory/2516-38-0x0000000001760000-0x0000000001770000-memory.dmp

    Filesize

    64KB

  • memory/2516-37-0x0000000001760000-0x0000000001770000-memory.dmp

    Filesize

    64KB

  • memory/2516-36-0x0000000001760000-0x0000000001770000-memory.dmp

    Filesize

    64KB

  • memory/2516-35-0x0000000001760000-0x0000000001770000-memory.dmp

    Filesize

    64KB

  • memory/2516-34-0x0000000001760000-0x0000000001770000-memory.dmp

    Filesize

    64KB

  • memory/2516-33-0x0000000001760000-0x0000000001770000-memory.dmp

    Filesize

    64KB

  • memory/2516-32-0x0000000001760000-0x0000000001770000-memory.dmp

    Filesize

    64KB

  • memory/2516-29-0x0000000001760000-0x0000000001770000-memory.dmp

    Filesize

    64KB