Overview

overview

7

Static

static

5

fcf5437a78...fc.elf

debian-12-armhf

7

Analysis

  • max time kernel
    148s
  • max time network
    152s
  • platform
    debian-12_armhf
  • resource
    debian12-armhf-20260513-en
  • resource tags

    arch:armhfimage:debian12-armhf-20260513-enkernel:6.1.0-17-armmp-lpaelocale:en-usos:debian-12-armhfsystem
  • submitted
    12/08/2026, 04:29

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General

  • Target
    fcf5437a7884cdecc7fd0f9b88bf6e33ec02748caedea247732db9ad3993e5fc.elf
  • Size 78KB
  • Sample260812-e4d8jsyekd
  • SHA256 fcf5437a7884cdecc7fd0f9b88bf6e33ec02748caedea247732db9ad3993e5fc
  • MD5 SHA1 SHA512 SSDEEP TLSH
Score
7/10
credential_accessdefense_evasiondiscoveryexecutionpersistenceprivilege_escalationupx

Malware Config

Signatures

  • Modifies Watchdog functionality 1 TTPs 2 IoCs

    Malware like Mirai modifies the Watchdog to prevent it restarting an infected system.

    defense_evasion
  • Creates/modifies Cron job 1 TTPs 1 IoCs

    Cron allows running tasks on a schedule, and is commonly used for malware persistence.

    executionpersistenceprivilege_escalation
  • Enumerates active TCP sockets 1 TTPs 1 IoCs

    Gets active TCP sockets from /proc virtual filesystem.

    discovery
  • Enumerates running processes

    Discovers information about currently running processes on the system

  • Modifies init.d 2 TTPs 1 IoCs

    Adds/modifies system service, likely for persistence.

    persistence
  • Modifies systemd 2 TTPs 1 IoCs

    Adds/ modifies systemd service files. Likely to achieve persistence.

    persistenceprivilege_escalation
  • Write file to user bin folder 1 IoCs
    persistence
  • Writes file to system bin folder 2 IoCs
  • Reads process memory 1 TTPs 52 IoCs

    Read the memory of a process through the /proc virtual filesystem. This can be used to steal credentials.

    credential_access
  • UPX packed file 1 IoCs

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

    upx
  • Reads system network configuration 1 TTPs 1 IoCs

    Uses contents of /proc filesystem to enumerate network settings.

    discovery
  • Command and Scripting Interpreter: Unix Shell 1 TTPs 4 IoCs

    Execute scripts via Unix Shell.

    execution
  • Reads runtime system information 64 IoCs

    Reads data from /proc virtual filesystem.

    discovery

Processes

  • /tmp/fcf5437a7884cdecc7fd0f9b88bf6e33ec02748caedea247732db9ad3993e5fc.elf
    /tmp/fcf5437a7884cdecc7fd0f9b88bf6e33ec02748caedea247732db9ad3993e5fc.elf
    1⤵
    • Modifies Watchdog functionality
    • Enumerates active TCP sockets
    • Modifies init.d
    • Modifies systemd
    • Write file to user bin folder
    • Writes file to system bin folder
    • Reads process memory
    • Reads system network configuration
    • Reads runtime system information
    PID:784
    • /bin/sh
      /bin/sh -c "systemctl enable infinitech >/dev/null 2>&1"
      2⤵
      • Command and Scripting Interpreter: Unix Shell
      PID:792
    • /bin/sh
      /bin/sh -c "systemctl start infinitech >/dev/null 2>&1"
      2⤵
      • Command and Scripting Interpreter: Unix Shell
      PID:795
    • /bin/sh
      /bin/sh -c "(crontab -l 2>/dev/null; echo \"7 7 7 7 7 /usr/local/bin/infinitd\") | crontab - >/dev/null 2>&1"
      2⤵
      • Command and Scripting Interpreter: Unix Shell
      PID:798
      • /usr/bin/crontab
        crontab -l
        3⤵
          PID:803
        • /usr/bin/crontab
          crontab -
          3⤵
          • Creates/modifies Cron job
          PID:802
      • /bin/sh
        /bin/sh -c "update-rc.d infinitech defaults >/dev/null 2>&1"
        2⤵
        • Command and Scripting Interpreter: Unix Shell
        PID:808
        • /usr/sbin/update-rc.d
          update-rc.d infinitech defaults
          3⤵
            PID:811

      Network

            MITRE ATT&CK Enterprise v16

            Reconnaissance

            Resource Development

            Initial Access

            Execution

            Command and Scripting Interpreter

            1
            T1059

            Unix Shell

            1
            T1059.004

            Scheduled Task/Job

            1
            T1053

            Cron

            1
            T1053.003

            Persistence

            Boot or Logon Autostart Execution

            2
            T1547

            XDG Autostart Entries

            1
            T1547.013

            Boot or Logon Initialization Scripts

            1
            T1037

            RC Scripts

            1
            T1037.004

            Create or Modify System Process

            1
            T1543

            Systemd Service

            1
            T1543.002

            Scheduled Task/Job

            1
            T1053

            Cron

            1
            T1053.003

            Privilege Escalation

            Boot or Logon Autostart Execution

            2
            T1547

            XDG Autostart Entries

            1
            T1547.013

            Boot or Logon Initialization Scripts

            1
            T1037

            RC Scripts

            1
            T1037.004

            Create or Modify System Process

            1
            T1543

            Systemd Service

            1
            T1543.002

            Scheduled Task/Job

            1
            T1053

            Cron

            1
            T1053.003

            Defense Evasion

            Impair Defenses

            1
            T1562

            Credential Access

            OS Credential Dumping

            1
            T1003

            Proc Filesystem

            1
            T1003.007

            Discovery

            System Network Configuration Discovery

            1
            T1016

            Internet Connection Discovery

            1
            T1016.001

            System Network Connections Discovery

            1
            T1049

            Lateral Movement

            Collection

            Command and Control

            Exfiltration

            Impact

            Replay Monitor

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            Downloads

            !infinitech
            • Path /etc/init.d/!infinitech
            • Size 98B
            • SHA256 8146e190e3e75b8913031c0f04ff3e1810e721f91c8a448919ae5f164621a135
            • MD5 SHA1 SHA512 TLSH
            Submit Download

            infinitech.service
            • Path /etc/systemd/system/infinitech.service
            • Size 134B
            • SHA256 d33b3ffb798158ca1aa39cbdb3c9bffd7e73eb5592ae8b83c90600b00b756f39
            • MD5 SHA1 SHA512 TLSH
            Submit Download

            infinitd
            • Path /usr/local/bin/infinitd
            • Size 78KB
            • SHA256 fcf5437a7884cdecc7fd0f9b88bf6e33ec02748caedea247732db9ad3993e5fc
            • MD5 SHA1 SHA512 SSDEEP TLSH
            Submit Download

            tmp.PRU7Nx
            • Path /var/spool/cron/crontabs/tmp.PRU7Nx
            • Size 209B
            • SHA256 625dc37eedf580e496d1dbf27eb7dc3cd19bf7dd27347f4d849036e4a724e821
            • MD5 SHA1 SHA512 TLSH
            Submit Download