Overview

overview

10

Static

static

10

rebirth.arm.elf

debian-9-armhf

9

Analysis

  • max time kernel
    108s
  • max time network
    150s
  • platform
    debian-9_armhf
  • resource
    debian9-armhf-20240418-en
  • resource tags

    arch:armhfimage:debian9-armhf-20240418-enkernel:4.9.0-13-armmp-lpaelocale:en-usos:debian-9-armhfsystem
  • submitted
    15-12-2024 02:20

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General

  • Target

    rebirth.arm.elf

  • Size

    78KB

  • MD5

    e3655f9c884e54bbdf823f43bec626a5

  • SHA1

    bc2a6f92892ae6542a268ceca05c7e0dcb921a70

  • SHA256

    0c93f902775524393a124b59e3e36214dc8c74f8ffa1ec7cf4ae02a409fef5b2

  • SHA512

    5f8f8c96991dcac108b190b5e7686734bc7efb7a58036705df7be926b00deeda9bf3fb1396e87afc44e0e33dfb5580a1988d6b24371da66f92da5682d3343a9a

  • SSDEEP

    1536:mioFUNmm6aN6HN4hu72mo4Wh087aDOK80/ckTu/vwiwbZnN:mioFUVZhWo9hP7YPQwiwbZnN

Score
9/10
defense_evasiondiscoverypersistence

Malware Config

Signatures

  • Contacts a large (23829) 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.arm.elf
    /tmp/rebirth.arm.elf
    1⤵
    • Modifies rc script
    • Changes its process name
    PID:645
    • /bin/sh
      sh -c "rm -rf bin/busybox && mkdir bin; >bin/busybox && mv /tmp/rebirth.arm.elf bin/busybox; chmod 777 bin/busybox"
      2⤵
      • File and Directory Permissions Modification
      • Writes file to tmp directory
      PID:646
      • /bin/rm
        rm -rf bin/busybox
        3⤵
          PID:648
        • /bin/mkdir
          mkdir bin
          3⤵
          • Reads runtime system information
          PID:649
        • /bin/mv
          mv /tmp/rebirth.arm.elf bin/busybox
          3⤵
          • Reads runtime system information
          PID:652
        • /bin/chmod
          chmod 777 bin/busybox
          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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