Overview

overview

7

Static

static

5

d20f7f227a...13.elf

debian-9-mips

7

Analysis

  • max time kernel
    148s
  • max time network
    149s
  • platform
    debian-9_mips
  • resource
    debian9-mipsbe-20260513-en
  • resource tags

    arch:mipsimage:debian9-mipsbe-20260513-enkernel:4.9.0-13-4kc-maltalocale:en-usos:debian-9-mipssystem
  • submitted
    23/08/2026, 03:42

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General

  • Target
    d20f7f227a0ad614049787f56a978f75ba4346df240e486933d57e14d7117c13.elf
  • Size 130KB
  • Sample260823-d9e7csdr2x
  • SHA256 d20f7f227a0ad614049787f56a978f75ba4346df240e486933d57e14d7117c13
  • MD5 SHA1 SHA512 SSDEEP TLSH
Score
7/10
defense_evasiondiscoveryexecutionpersistenceprivilege_escalationupx

Malware Config

Signatures

  • Deletes itself 1 IoCs
  • Creates/modifies Cron job 1 TTPs 1 IoCs

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

    executionpersistenceprivilege_escalation
  • Creates/modifies environment variables 1 TTPs 8 IoCs

    Creating/modifying environment variables is a common persistence mechanism.

    persistenceprivilege_escalationdefense_evasion
  • Modifies init.d 2 TTPs 1 IoCs

    Adds/modifies system service, likely for persistence.

    persistence
  • Modifies rc script 2 TTPs 1 IoCs

    Adding/modifying system rc scripts is a common persistence mechanism.

    persistence
  • Modifies systemd 2 TTPs 1 IoCs

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

    persistenceprivilege_escalation
  • Modifies Bash startup script 2 TTPs 8 IoCs
    persistence
  • UPX packed file 1 IoCs

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

    upx
  • Changes its process name 1 IoCs
  • Reads runtime system information 4 IoCs

    Reads data from /proc virtual filesystem.

    discovery

Processes

  • /tmp/d20f7f227a0ad614049787f56a978f75ba4346df240e486933d57e14d7117c13.elf
    /tmp/d20f7f227a0ad614049787f56a978f75ba4346df240e486933d57e14d7117c13.elf
    1⤵
    • Deletes itself
    • Creates/modifies environment variables
    • Modifies init.d
    • Modifies rc script
    • Modifies systemd
    • Modifies Bash startup script
    • Changes its process name
    • Reads runtime system information
    PID:727
    • /bin/sh
      sh -c "crontab -l 2>/dev/null"
      2⤵
        PID:730
        • /usr/bin/crontab
          crontab -l
          3⤵
          • Reads runtime system information
          PID:732
      • /bin/sh
        sh -c "(crontab -l 2>/dev/null; echo '@reboot /usr/lib/kworker-helper') | crontab - 2>/dev/null"
        2⤵
          PID:736
          • /usr/bin/crontab
            crontab -
            3⤵
            • Creates/modifies Cron job
            • Reads runtime system information
            PID:741
          • /usr/bin/crontab
            crontab -l
            3⤵
            • Reads runtime system information
            PID:742
      • /bin/busybox
        chattr +i /etc/init.d/kworker-helper
        1⤵
          PID:752
        • /bin/busybox
          chattr +i /etc/systemd/system/kworker-helper.service
          1⤵
            PID:750
          • /usr/bin/chattr
            chattr +i /usr/lib/kworker-helper
            1⤵
              PID:746
            • /usr/bin/chattr
              chattr +i /etc/init.d/kworker-helper
              1⤵
                PID:748
              • /usr/bin/chattr
                chattr +i /etc/systemd/system/kworker-helper.service
                1⤵
                  PID:747
                • /bin/busybox
                  chattr +i /usr/lib/kworker-helper
                  1⤵
                    PID:749

                  Network

                        MITRE ATT&CK Enterprise v16

                        Reconnaissance

                        Resource Development

                        Initial Access

                        Execution

                        Scheduled Task/Job

                        1
                        T1053

                        Cron

                        1
                        T1053.003

                        Persistence

                        Boot or Logon Autostart Execution

                        4
                        T1547

                        XDG Autostart Entries

                        1
                        T1547.013

                        Boot or Logon Initialization Scripts

                        2
                        T1037

                        RC Scripts

                        2
                        T1037.004

                        Create or Modify System Process

                        1
                        T1543

                        Systemd Service

                        1
                        T1543.002

                        Event Triggered Execution

                        1
                        T1546

                        Unix Shell Configuration Modification

                        1
                        T1546.004

                        Hijack Execution Flow

                        1
                        T1574

                        Path Interception by PATH Environment Variable

                        1
                        T1574.007

                        Scheduled Task/Job

                        1
                        T1053

                        Cron

                        1
                        T1053.003

                        Privilege Escalation

                        Boot or Logon Autostart Execution

                        4
                        T1547

                        XDG Autostart Entries

                        1
                        T1547.013

                        Boot or Logon Initialization Scripts

                        2
                        T1037

                        RC Scripts

                        2
                        T1037.004

                        Create or Modify System Process

                        1
                        T1543

                        Systemd Service

                        1
                        T1543.002

                        Event Triggered Execution

                        1
                        T1546

                        Unix Shell Configuration Modification

                        1
                        T1546.004

                        Hijack Execution Flow

                        1
                        T1574

                        Path Interception by PATH Environment Variable

                        1
                        T1574.007

                        Scheduled Task/Job

                        1
                        T1053

                        Cron

                        1
                        T1053.003

                        Defense Evasion

                        Hijack Execution Flow

                        1
                        T1574

                        Path Interception by PATH Environment Variable

                        1
                        T1574.007

                        Credential Access

                        Discovery

                        Lateral Movement

                        Collection

                        Command and Control

                        Exfiltration

                        Impact

                        Replay Monitor

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                        Downloads

                        kworker-helper
                        • Path /etc/init.d/kworker-helper
                        • Size 379B
                        • SHA256 daeb1a39fa3bf6fad15573d3aba269ac40fd43532bb487be2ed13453756cbe50
                        • MD5 SHA1 SHA512 TLSH
                        Submit Download

                        kworker-helper.service
                        • Path /etc/systemd/system/kworker-helper.service
                        • Size 190B
                        • SHA256 dcc492c83b938187ae12ae6df39f2350a98bb80761d79aa3ad4f29fa9a371c07
                        • MD5 SHA1 SHA512 TLSH
                        Submit Download

                        .ashrc
                        • Path /root/.ashrc
                        • Size 61B
                        • SHA256 30fc62ecc4fde897502efdd4821bd14c60694b758b6664f4044cfd48ca3a2efb
                        • MD5 SHA1 SHA512
                        Submit Download

                        kworker-helper
                        • Path /usr/lib/kworker-helper
                        • Size 130KB
                        • SHA256 d20f7f227a0ad614049787f56a978f75ba4346df240e486933d57e14d7117c13
                        • MD5 SHA1 SHA512 SSDEEP TLSH
                        Submit Download

                        tmp.QCCoq4
                        • Path /var/spool/cron/crontabs/tmp.QCCoq4
                        • Size 207B
                        • SHA256 a9ef6b7d7fdc188f469bbdf11d1f0cae0caaf6f79c7b4c515e8bafcb3abab872
                        • MD5 SHA1 SHA512 TLSH
                        Submit Download