Overview

overview

9

Static

static

1

ciubuc_i486.elf

ubuntu-18.04-amd64

9

Analysis

  • max time kernel
    149s
  • max time network
    151s
  • platform
    ubuntu-18.04_amd64
  • resource
    ubuntu1804-amd64-20260127-en
  • resource tags

    arch:amd64arch:i386image:ubuntu1804-amd64-20260127-enkernel:4.15.0-213-genericlocale:en-usos:ubuntu-18.04-amd64system
  • submitted
    03/05/2026, 00:07

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General

  • Target
    ciubuc_i486.elf
  • Size 2.3MB
  • Sample260503-aefymads7n
  • SHA256 eab92ddb536aa5393b427eec8c2b0be76beb90894018cfcd5aba09ce8cdd1e5e
  • MD5 SHA1 SHA512 SSDEEP TLSH
Score
9/10
defense_evasiondiscovery

Malware Config

Signatures

  • Contacts a large (151553) amount of remote hosts 1 TTPs

    This may indicate a network scan to discover remotely running services.

    discovery
  • Creates a large amount of network flows 1 TTPs

    This may indicate a network scan to discover remotely running services.

    discovery
  • Deletes Audit logs 1 TTPs 1 IoCs

    Deletes logs related to the Linux Audit framework.

    defense_evasion
  • Deletes itself 1 IoCs
  • Deletes journal logs 1 TTPs 1 IoCs

    Deletes systemd journal logs. Likely to evade detection.

    defense_evasion
  • Deletes system logs 1 TTPs 1 IoCs

    Deletes log file which contains global system messages. Adversaries may delete system logs to minimize their footprint.

    defense_evasion
  • Modifies Watchdog functionality 1 TTPs 2 IoCs

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

    defense_evasion
  • Traces itself 3 IoCs

    Traces itself to prevent debugging attempts

  • Enumerates running processes

    Discovers information about currently running processes on the system

  • Changes its process name 4 IoCs
  • Reads runtime system information 64 IoCs

    Reads data from /proc virtual filesystem.

    discovery

Processes

  • /tmp/ciubuc_i486.elf
    /tmp/ciubuc_i486.elf
    1⤵
    • Deletes Audit logs
    • Deletes itself
    • Deletes journal logs
    • Deletes system logs
    • Modifies Watchdog functionality
    • Traces itself
    • Changes its process name
    • Reads runtime system information
    PID:1516

Network

        MITRE ATT&CK Enterprise v16

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