Overview

overview

6

Static

static

5

x86_64.elf

ubuntu-18.04-amd64

6

Analysis

  • max time kernel
    149s
  • max time network
    150s
  • platform
    ubuntu-18.04_amd64
  • resource
    ubuntu1804-amd64-20260513-en
  • resource tags

    arch:amd64arch:i386image:ubuntu1804-amd64-20260513-enkernel:4.15.0-213-genericlocale:en-usos:ubuntu-18.04-amd64system
  • submitted
    04/08/2026, 05:49

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General

  • Target
    x86_64.elf
  • Size 57KB
  • Sample260804-gh7dbascma
  • SHA256 917329a8aa816011af9dbcd309dfbb04fdf246b9418d65be90779005eb77b763
  • MD5 SHA1 SHA512 SSDEEP TLSH
Score
6/10
discoveryexecutionpersistenceprivilege_escalationupx

Malware Config

Signatures

  • Creates/modifies Cron job 1 TTPs 1 IoCs

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

    executionpersistenceprivilege_escalation
  • 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
  • Write file to user bin folder 1 IoCs
    persistence
  • UPX packed file 1 IoCs

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

    upx
  • Changes its process name 4 IoCs
  • Reads runtime system information 8 IoCs

    Reads data from /proc virtual filesystem.

    discovery

Processes

  • /tmp/x86_64.elf
    /tmp/x86_64.elf
    1⤵
    • Modifies rc script
    • Modifies systemd
    • Write file to user bin folder
    • Changes its process name
    • Reads runtime system information
    PID:1480
    • /bin/sh
      sh -c "systemctl enable ejy5beg4n97.service >/dev/null 2>&1"
      2⤵
        PID:1490
        • /bin/systemctl
          systemctl enable ejy5beg4n97.service
          3⤵
          • Reads runtime system information
          PID:1491
      • /bin/sh
        sh -c "crontab -l 2>/dev/null"
        2⤵
          PID:1512
          • /usr/bin/crontab
            crontab -l
            3⤵
              PID:1513
          • /bin/sh
            sh -c "(crontab -l 2>/dev/null; echo '@reboot /usr/local/bin/6tbdcbx51w8yeiq &') | crontab -"
            2⤵
              PID:1514
              • /usr/bin/crontab
                crontab -
                3⤵
                • Creates/modifies Cron job
                PID:1516
              • /usr/bin/crontab
                crontab -l
                3⤵
                  PID:1517

            Network

                  MITRE ATT&CK Enterprise v16

                  Replay Monitor

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                  Downloads

                  ejy5beg4n97.service
                  • Path /etc/systemd/system/ejy5beg4n97.service
                  • Size 186B
                  • SHA256 b43ec8e820d9cef7c4f1d8f8af3f5c197fd57c02c16ffc07c5f1171a906a125a
                  • MD5 SHA1 SHA512 TLSH
                  Submit Download

                  6tbdcbx51w8yeiq
                  • Path /usr/local/bin/6tbdcbx51w8yeiq
                  • Size 57KB
                  • SHA256 917329a8aa816011af9dbcd309dfbb04fdf246b9418d65be90779005eb77b763
                  • MD5 SHA1 SHA512 SSDEEP TLSH
                  Submit Download

                  tmp.N0bAkg
                  • Path /var/spool/cron/crontabs/tmp.N0bAkg
                  • Size 216B
                  • SHA256 597d84e800e8e6a361ca50e7e853f0902b955f2cb20e96aeba42bcb1b4182d74
                  • MD5 SHA1 SHA512 TLSH
                  Submit Download