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Overview

overview

10

Static

static

10

rebirth.arm5.elf

debian-9-armhf

9

Analysis

  • max time kernel
    137s
  • max time network
    160s
  • platform
    debian-9_armhf
  • resource
    debian9-armhf-20240611-en
  • resource tags

    arch:armhfimage:debian9-armhf-20240611-enkernel:4.9.0-13-armmp-lpaelocale:en-usos:debian-9-armhfsystem
  • submitted
    15/12/2024, 01:54

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General

  • Target

    rebirth.arm5.elf

  • Size

    77KB

  • MD5

    bc20ac7e3796eeb3398dfc154e355ef1

  • SHA1

    6a56bc02448b45425020a2425a6ea39a7c72d8d7

  • SHA256

    cfdac538bff6b50b3bc4726f45cf6e959b5c84b2b33c340670c958afc5a5e34f

  • SHA512

    139416555fc4451509d5d3090114295d440aeab231a502dea7c1c79ed30860991f4ebfbd1946a727dc79dc9a8cdc9acd2184a063a10dde9ef2dc4695e47b071e

  • SSDEEP

    1536:6ODrgViG5ZK5HKRjP72I9OqsFkWa9V5bPoVEmwbZnN:6ODrgdNj79OqukWkb3mwbZnN

Score
9/10
defense_evasiondiscoverypersistence

Malware Config

Signatures

  • Contacts a large (23350) 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.arm5.elf
    /tmp/rebirth.arm5.elf
    1⤵
    • Modifies rc script
    • Changes its process name
    PID:649
    • /bin/sh
      sh -c "rm -rf bin/systemd && mkdir bin; >bin/systemd && mv /tmp/rebirth.arm5.elf bin/systemd; chmod 777 bin/systemd"
      2⤵
      • File and Directory Permissions Modification
      • Writes file to tmp directory
      PID:650
      • /bin/rm
        rm -rf bin/systemd
        3⤵
          PID:651
        • /bin/mkdir
          mkdir bin
          3⤵
          • Reads runtime system information
          PID:654
        • /bin/mv
          mv /tmp/rebirth.arm5.elf bin/systemd
          3⤵
          • Reads runtime system information
          PID:657
        • /bin/chmod
          chmod 777 bin/systemd
          3⤵
          • File and Directory Permissions Modification
          PID:658

    Network

    MITRE ATT&CK Enterprise v15

    Replay Monitor

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    Downloads

    • /etc/rc.local
      Filesize

      95B

      MD5

      ea1dfdca9880b1a10b7368aa0dfe2aef

      SHA1

      b945ec5d90fc07016b606cc10651203d058bfe88

      SHA256

      fb51f4b2f2f0c8eadb95244b3a602d1355de8e4d578375dd7736effa1501fb1a

      SHA512

      3a4fc8238729102268cff2a88f7ce0d3424a0739a94feb33b725d2f54dca8659427c9f393a1782f16a06e752bfca4e98e761427bb7ef90f4fbfeacbedd0b7b47

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