Overview

overview

10

Static

static

10

2026-08-09...os.exe

windows10-2004-x64

10

2026-08-09...os.exe

windows11-ltsc_2024-x64

10

Analysis

  • max time kernel
    149s
  • max time network
    151s
  • platform
    windows11-ltsc_2024_x64
  • resource
    win11ltsc2024-20260709-en
  • resource tags

    arch:x64arch:x86image:win11ltsc2024-20260709-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
  • submitted
    09/08/2026, 04:41

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General

  • Target
    2026-08-09_f9da78bbd4770e63969e42c246d52c70_coinminer_elex_floxif_helldown_luca-stealer_mespinoza_njrat_remcos.exe
  • Size 5.3MB
  • Sample260809-fbfrcazhmf
  • SHA256 b8ae4526b608b83571ec35484da90ea23526785ca3de29155eb1b17663a540af
  • MD5 SHA1 SHA512 SSDEEP TLSH
Score
10/10
backdoordiscoveryfloxifpersistenceprivilege_escalationspywarestealertrojanupx

Malware Config

Signatures

  • Family: Floxif, Floodfix

    Floxif aka FloodFix is a file-changing trojan and backdoor written in C++.

    backdoortrojanfloxif
  • Detects Floxif payload 1 IoCs
    backdoor
  • UPX dump on OEP (original entry point) 11 IoCs
  • Event Triggered Execution: AppInit DLLs 1 TTPs

    Adversaries may establish persistence and/or elevate privileges by executing malicious content triggered by AppInit DLLs loaded into processes.

    persistenceprivilege_escalation
  • ACProtect 1.3x - 1.4x DLL software 1 IoCs

    Detects file using ACProtect software.

  • Loads dropped DLL 4 IoCs
  • Reads user/profile data of local email clients 2 TTPs

    Email clients store some user data on disk where infostealers will often target it.

    spywarestealer
  • Reads user/profile data of web browsers 3 TTPs

    Infostealers often target stored browser data, which can include saved credentials etc.

    spywarestealer
  • Adds Run key to start application 2 TTPs 1 IoCs
    persistence
  • Checks for any installed AV software in registry 1 TTPs 8 IoCs
  • Enumerates connected drives 3 TTPs 22 IoCs

    Attempts to read the root path of hard drives other than the default C: drive.

  • UPX packed file 11 IoCs

    Detects executables packed with UPX/modified UPX open source packer.

    upx
  • Drops file in Program Files directory 2 IoCs
  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s).

  • System Location Discovery: System Language Discovery 1 TTPs 2 IoCs

    Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

    discovery
  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious use of AdjustPrivilegeToken 3 IoCs
  • Suspicious use of FindShellTrayWindow 3 IoCs
  • Suspicious use of SendNotifyMessage 3 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\2026-08-09_f9da78bbd4770e63969e42c246d52c70_coinminer_elex_floxif_helldown_luca-stealer_mespinoza_njrat_remcos.exe
    "C:\Users\Admin\AppData\Local\Temp\2026-08-09_f9da78bbd4770e63969e42c246d52c70_coinminer_elex_floxif_helldown_luca-stealer_mespinoza_njrat_remcos.exe"
    1⤵
    • Loads dropped DLL
    • Adds Run key to start application
    • Checks for any installed AV software in registry
    • Enumerates connected drives
    • Drops file in Program Files directory
    • System Location Discovery: System Language Discovery
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of FindShellTrayWindow
    • Suspicious use of SendNotifyMessage
    PID:4436
  • C:\Users\Admin\AppData\Local\Temp\2026-08-09_f9da78bbd4770e63969e42c246d52c70_coinminer_elex_floxif_helldown_luca-stealer_mespinoza_njrat_remcos.exe
    "C:\Users\Admin\AppData\Local\Temp\2026-08-09_f9da78bbd4770e63969e42c246d52c70_coinminer_elex_floxif_helldown_luca-stealer_mespinoza_njrat_remcos.exe" /Startup
    1⤵
    • Loads dropped DLL
    • System Location Discovery: System Language Discovery
    • Suspicious use of AdjustPrivilegeToken
    PID:2780

Network

        MITRE ATT&CK Enterprise v16

        Reconnaissance

        Resource Development

        Initial Access

        Execution

        Persistence

        Boot or Logon Autostart Execution

        1
        T1547

        Registry Run Keys / Startup Folder

        1
        T1547.001

        Event Triggered Execution

        1
        T1546

        AppInit DLLs

        1
        T1546.010

        Privilege Escalation

        Boot or Logon Autostart Execution

        1
        T1547

        Registry Run Keys / Startup Folder

        1
        T1547.001

        Event Triggered Execution

        1
        T1546

        AppInit DLLs

        1
        T1546.010

        Defense Evasion

        Modify Registry

        1
        T1112

        Credential Access

        Credentials from Password Stores

        1
        T1555

        Credentials from Web Browsers

        1
        T1555.003

        Unsecured Credentials

        2
        T1552

        Credentials In Files

        2
        T1552.001

        Discovery

        Peripheral Device Discovery

        1
        T1120

        Query Registry

        1
        T1012

        Software Discovery

        1
        T1518

        Security Software Discovery

        1
        T1518.001

        System Information Discovery

        2
        T1082

        System Location Discovery

        1
        T1614

        System Language Discovery

        1
        T1614.001

        Lateral Movement

        Collection

        Data from Local System

        2
        T1005

        Command and Control

        Exfiltration

        Impact

        Replay Monitor

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        Downloads

        symsrv.dll
        • Path C:\Program Files\Common Files\System\symsrv.dll
        • Size 67KB
        • SHA256 de055a89de246e629a8694bde18af2b1605e4b9b493c7e4aef669dd67acf5085
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        symsrv.dll.000
        • Path C:\Program Files\Common Files\System\symsrv.dll.000
        • Size 114B
        • SHA256 aefc503b1ed462d7b6280228a7b5b710792273b78934426f88325341ac5b5a92
        • MD5 SHA1 SHA512 TLSH
        Submit Download

        memory/2780-25-0x0000000010000000-0x0000000010030000-memory.dmp
        Download

        memory/2780-27-0x00000000083C0000-0x00000000083F0000-memory.dmp
        Download

        memory/2780-15-0x00000000083C0000-0x00000000083F0000-memory.dmp
        Download

        memory/2780-31-0x0000000010000000-0x0000000010030000-memory.dmp
        Download

        memory/2780-14-0x00000000083C0000-0x00000000083F0000-memory.dmp
        Download

        memory/2780-26-0x00000000083C0000-0x00000000083F0000-memory.dmp
        Download

        memory/2780-13-0x0000000010000000-0x0000000010030000-memory.dmp
        Download

        memory/4436-23-0x000000000FFA0000-0x000000000FFBC000-memory.dmp
        Download

        memory/4436-24-0x0000000010000000-0x0000000010030000-memory.dmp
        Download

        memory/4436-22-0x000000000FFA0000-0x000000000FFBC000-memory.dmp
        Download

        memory/4436-32-0x0000000010000000-0x0000000010030000-memory.dmp
        Download

        memory/4436-35-0x0000000010000000-0x0000000010030000-memory.dmp
        Download

        memory/4436-38-0x0000000010000000-0x0000000010030000-memory.dmp
        Download

        memory/4436-3-0x0000000010000000-0x0000000010030000-memory.dmp
        Download

        memory/4436-44-0x0000000010000000-0x0000000010030000-memory.dmp
        Download

        memory/4436-52-0x0000000010000000-0x0000000010030000-memory.dmp
        Download