Overview

overview

10

Static

static

10

rebirth.arm5.elf

debian-9-armhf

9

Analysis

  • max time kernel
    149s
  • max time network
    152s
  • 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
    10-12-2024 05:31

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General

  • Target

    rebirth.arm5.elf

  • Size

    73KB

  • MD5

    ccd83585565fbeccddc35324d3dd9dc1

  • SHA1

    6bdd95629dbefbe8c4957440a7c5d2c7e87f64f8

  • SHA256

    5b761a8a4e448721cd51b87c58fb74827e017e9d83decb8f0a4d63ee4e9406fe

  • SHA512

    dde4e4f7dd9dfd063bfa54b886da483a7f0e97a8a791c3416a00b4fb868bb547ba596cac1f8032d891d901970bdeb0b8bddf47d01f3c822963dc63373f5fb0a6

  • SSDEEP

    1536:3CntOZQkZ1G51FLl572IgbNYrQFKSMjky5jreZzOwbZnNf:3CntO2JvLlpgbNYraKSGjaOwbZnNf

Score
9/10
defense_evasiondiscoverypersistence

Malware Config

Signatures

  • Contacts a large (23352) 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:666
    • /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:668
      • /bin/rm
        rm -rf bin/systemd
        3⤵
          PID:670
        • /bin/mkdir
          mkdir bin
          3⤵
          • Reads runtime system information
          PID:672
        • /bin/mv
          mv /tmp/rebirth.arm5.elf bin/systemd
          3⤵
          • Reads runtime system information
          PID:677
        • /bin/chmod
          chmod 777 bin/systemd
          3⤵
          • File and Directory Permissions Modification
          PID:680

    Network

    MITRE ATT&CK Enterprise v15

    Replay Monitor

    Loading Replay Monitor...

    Downloads

    • /etc/rc.local
      Filesize

      95B

      MD5

      ea1dfdca9880b1a10b7368aa0dfe2aef

      SHA1

      b945ec5d90fc07016b606cc10651203d058bfe88

      SHA256

      fb51f4b2f2f0c8eadb95244b3a602d1355de8e4d578375dd7736effa1501fb1a

      SHA512

      3a4fc8238729102268cff2a88f7ce0d3424a0739a94feb33b725d2f54dca8659427c9f393a1782f16a06e752bfca4e98e761427bb7ef90f4fbfeacbedd0b7b47

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