Overview

overview

10

Static

static

3

2026-08-02...op.exe

windows10-2004-x64

10

2026-08-02...op.exe

windows11-ltsc_2024-x64

10

Analysis

  • max time kernel
    149s
  • max time network
    152s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20260513-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20260513-enlocale:en-usos:windows10-2004-x64systemwindows
  • submitted
    02/08/2026, 02:45

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General

  • Target
    2026-08-02_ac9d8f9ad1be4616864cadea3f5da201_elex_maze_rhadamanthys_stealc_stop.exe
  • Size 12.0MB
  • Sample260802-c888dacj2y
  • SHA256 9a1695ed3ffb0c9ccecdc1b6561e48252b84e7c720a53e0e9400438bb219f7c0
  • MD5 SHA1 SHA512 SSDEEP TLSH
Score
10/10
defense_evasiondiscoveryexecutiontofseepersistenceprivilege_escalationtrojan

Malware Config

Extracted

Family

  • tofsee

C2

  • vanaheim.cn

  • jotunheim.name

Signatures

  • Family: Tofsee

    Backdoor/botnet which carries out malicious activities based on commands from a C2 server.

    trojantofsee
  • Modifies Windows Firewall 2 TTPs 1 IoCs
    defense_evasion
  • Sets service image path in registry 3 TTPs 1 IoCs

    This determines the executable launched when a service starts. It can be used to establish persistence.

    persistence
  • Checks computer location settings 2 TTPs 1 IoCs

    Looks up country code configured in the registry, likely geofence.

  • Creates new service(s) 2 TTPs
    persistenceexecution
  • Deletes itself 1 IoCs
  • Executes dropped EXE 1 IoCs
  • Stops running service(s) 4 TTPs
    defense_evasionexecution
  • 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.

    persistenceprivilege_escalation
  • Executes a command shell one-liner 1 TTPs 2 IoCs

    Execution of a cmd.exe one-liner (/c "close" or /k "keep") is a common script/loader stage.

    execution
  • Program crash 2 IoCs
  • 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.

    discovery
  • Suspicious use of WriteProcessMemory 8 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\2026-08-02_ac9d8f9ad1be4616864cadea3f5da201_elex_maze_rhadamanthys_stealc_stop.exe
    "C:\Users\Admin\AppData\Local\Temp\2026-08-02_ac9d8f9ad1be4616864cadea3f5da201_elex_maze_rhadamanthys_stealc_stop.exe"
    1⤵
    • Checks computer location settings
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:4584
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\qvrcosmo\
      2⤵
      • Executes a command shell one-liner
      • System Location Discovery: System Language Discovery
      PID:3892
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\nubethak.exe" C:\Windows\SysWOW64\qvrcosmo\
      2⤵
      • Executes a command shell one-liner
      • System Location Discovery: System Language Discovery
      PID:5008
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" create qvrcosmo binPath= "C:\Windows\SysWOW64\qvrcosmo\nubethak.exe /d\"C:\Users\Admin\AppData\Local\Temp\2026-08-02_ac9d8f9ad1be4616864cadea3f5da201_elex_maze_rhadamanthys_stealc_stop.exe\"" type= own start= auto DisplayName= "wifi support"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:4328
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" description qvrcosmo "wifi internet conection"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:3848
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" start qvrcosmo
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:4396
    • 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:2576
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 4584 -s 1272
      2⤵
      • Program crash
      PID:3768
  • C:\Windows\SysWOW64\qvrcosmo\nubethak.exe
    C:\Windows\SysWOW64\qvrcosmo\nubethak.exe /d"C:\Users\Admin\AppData\Local\Temp\2026-08-02_ac9d8f9ad1be4616864cadea3f5da201_elex_maze_rhadamanthys_stealc_stop.exe"
    1⤵
    • Executes dropped EXE
    • Suspicious use of SetThreadContext
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:1484
    • C:\Windows\SysWOW64\svchost.exe
      svchost.exe
      2⤵
      • Sets service image path in registry
      • Deletes itself
      • System Location Discovery: System Language Discovery
      PID:2088
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 1484 -s 524
      2⤵
      • Program crash
      PID:1152
  • C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -pss -s 444 -p 1484 -ip 1484
    1⤵
      PID:2084
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -pss -s 512 -p 4584 -ip 4584
      1⤵
        PID:3816

      Network

            MITRE ATT&CK Enterprise v16

            Reconnaissance

            Resource Development

            Initial Access

            Execution

            Command and Scripting Interpreter

            1
            T1059

            Windows Command Shell

            1
            T1059.003

            System Services

            2
            T1569

            Service Execution

            2
            T1569.002

            Persistence

            Boot or Logon Autostart Execution

            1
            T1547

            Registry Run Keys / Startup Folder

            1
            T1547.001

            Create or Modify System Process

            4
            T1543

            Windows Service

            4
            T1543.003

            Event Triggered Execution

            1
            T1546

            Netsh Helper DLL

            1
            T1546.007

            Privilege Escalation

            Boot or Logon Autostart Execution

            1
            T1547

            Registry Run Keys / Startup Folder

            1
            T1547.001

            Create or Modify System Process

            4
            T1543

            Windows Service

            4
            T1543.003

            Event Triggered Execution

            1
            T1546

            Netsh Helper DLL

            1
            T1546.007

            Defense Evasion

            Impair Defenses

            2
            T1562

            Disable or Modify System Firewall

            1
            T1562.004

            Modify Registry

            1
            T1112

            Credential Access

            Discovery

            Query Registry

            1
            T1012

            System Information Discovery

            2
            T1082

            System Location Discovery

            1
            T1614

            System Language Discovery

            1
            T1614.001

            Lateral Movement

            Collection

            Command and Control

            Exfiltration

            Impact

            Service Stop

            1
            T1489

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            Downloads

            nubethak.exe
            • Path C:\Users\Admin\AppData\Local\Temp\nubethak.exe
            • Size 13.9MB
            • SHA256 26621361828eca370c2b26939743391c9e4a6f8a732877a269bbf1d066a11401
            • MD5 SHA1 SHA512 SSDEEP TLSH
            Submit Download

            memory/1484-9-0x0000000000400000-0x0000000001A33000-memory.dmp
            Download

            memory/2088-7-0x0000000001070000-0x0000000001085000-memory.dmp
            Download

            memory/2088-12-0x0000000001070000-0x0000000001085000-memory.dmp
            Download

            memory/2088-13-0x0000000001070000-0x0000000001085000-memory.dmp
            Download

            memory/4584-1-0x0000000001CE0000-0x0000000001DE0000-memory.dmp
            Download

            memory/4584-2-0x0000000001C90000-0x0000000001CA3000-memory.dmp
            Download

            memory/4584-11-0x0000000001C90000-0x0000000001CA3000-memory.dmp
            Download

            memory/4584-10-0x0000000000400000-0x0000000001A33000-memory.dmp
            Download