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Overview

overview

10

Static

static

10

rebirth.x86.elf

ubuntu-24.04-amd64

9

Analysis

  • max time kernel
    149s
  • max time network
    150s
  • platform
    ubuntu-24.04_amd64
  • resource
    ubuntu2404-amd64-20240523-en
  • resource tags

    arch:amd64arch:i386image:ubuntu2404-amd64-20240523-enkernel:6.8.0-31-genericlocale:en-usos:ubuntu-24.04-amd64system
  • submitted
    15/12/2024, 04:11

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General

  • Target

    rebirth.x86.elf

  • Size

    75KB

  • MD5

    c70d6d70685235b94fed5ec73aed3b2c

  • SHA1

    cc9ebae95a7c15a670388fc44e0fd41547c17e18

  • SHA256

    3231a0ef57c7107fefb310e12f4d2994fc9d0afd9c76148ce1cd409d5cb5dd7e

  • SHA512

    e3fb2b71ad3a106724355eeae05f20f483ebd5c78e36d93c2a2ad7137bb6fd95b3c79d916322a99b2819c07ee00bc132cf1bad1735edc3a02e4144dd5c408954

  • SSDEEP

    1536:dvBGpSzKkubpUa2jecqCR/JYHqDIw+e6+MFOPRkTZRbXXTzpwbZnR+5:hcpHblUaBcPNeHqEw36FOPOZRTXTNwbf

Score
9/10
defense_evasiondiscoverypersistence

Malware Config

Signatures

  • Contacts a large (23995) 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
  • File and Directory Permissions Modification 1 TTPs 2 IoCs

    Adversaries may modify file or directory permissions to evade defenses.

    defense_evasion
  • Modifies rc script 2 TTPs 1 IoCs

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

    persistence
  • Changes its process name 1 IoCs
  • Reads runtime system information 2 IoCs

    Reads data from /proc virtual filesystem.

    discovery
  • Writes file to tmp directory 1 IoCs

    Malware often drops required files in the /tmp directory.

Processes

  • /tmp/rebirth.x86.elf
    /tmp/rebirth.x86.elf
    1⤵
    • Modifies rc script
    • Changes its process name
    PID:2438
    • /bin/sh
      sh -c "rm -rf bin/systemd && mkdir bin; >bin/systemd && mv /tmp/rebirth.x86.elf bin/systemd; chmod 777 bin/systemd"
      2⤵
      • File and Directory Permissions Modification
      • Writes file to tmp directory
      PID:2440
      • /usr/bin/rm
        rm -rf bin/systemd
        3⤵
          PID:2441
        • /usr/bin/mkdir
          mkdir bin
          3⤵
          • Reads runtime system information
          PID:2442
        • /usr/bin/mv
          mv /tmp/rebirth.x86.elf bin/systemd
          3⤵
          • Reads runtime system information
          PID:2443
        • /usr/bin/chmod
          chmod 777 bin/systemd
          3⤵
          • File and Directory Permissions Modification
          PID:2444

    Network

    MITRE ATT&CK Enterprise v15

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    Downloads