Analysis

  • max time kernel
    3s
  • platform
    debian-9_mips
  • resource
    debian9-mipsbe-20240611-en
  • resource tags

    arch:mipsimage:debian9-mipsbe-20240611-enkernel:4.9.0-13-4kc-maltalocale:en-usos:debian-9-mipssystem
  • submitted
    08-11-2024 11:36

General

  • Target

    .systemd/ntpdate

  • Size

    4KB

  • MD5

    e1e04a6303387665ef0db838157d63d6

  • SHA1

    ebb08e424ce4251827c0ddea5ac91f971a1a8f73

  • SHA256

    af0b766bcffc9bf2e2a1a6059515d0bc58e60d4de3fe19598de7411fb619b65d

  • SHA512

    f2eea4ac06e9cb750e36a35a10e22cdd60403982f9d1597cd96002972b7fe3228c8ae3caf5f7cc028221a36d81615be4369a9f34fa4c81ae84dd1dd0f5cf4f76

  • SSDEEP

    48:QuH1wKQWqaT2WHKBNCNN12WHNS4g2WHEoeXa5J2WH95J2WHT:1V4WH+C4WHNRWHEoeRWHsWHT

Malware Config

Signatures

  • File and Directory Permissions Modification 1 TTPs 4 IoCs

    Adversaries may modify file or directory permissions to evade defenses.

  • Attempts to change immutable files 9 IoCs

    Modifies inode attributes on the filesystem to allow changing of immutable files.

  • Creates/modifies Cron job 1 TTPs 5 IoCs

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

  • Modifies init.d 2 TTPs 1 IoCs

    Adds/modifies system service, likely for persistence.

  • Writes file to system bin folder 2 IoCs
  • Reads runtime system information 5 IoCs

    Reads data from /proc virtual filesystem.

  • System Network Configuration Discovery 1 TTPs 4 IoCs

    Adversaries may gather information about the network configuration of a system.

  • Writes file to tmp directory 1 IoCs

    Malware often drops required files in the /tmp directory.

Processes

  • /tmp/.systemd/ntpdate
    /tmp/.systemd/ntpdate
    1⤵
    • Writes file to tmp directory
    PID:721
    • /bin/uname
      uname -m
      2⤵
        PID:724
      • /bin/cat
        cat systemd.dir
        2⤵
          PID:730
        • /bin/mkdir
          mkdir -p /etc/cron.d /etc/cron.daily /etc/cron.hourly /etc/cron.monthly /etc/cron.weekly
          2⤵
          • Reads runtime system information
          PID:731
        • /usr/bin/chattr
          chattr -i -a "/etc/cron.*/ntpdate" /sbin/bcrond
          2⤵
          • Attempts to change immutable files
          PID:732
        • /bin/rm
          rm -rf /sbin/bcrond
          2⤵
            PID:734
          • /bin/cp
            cp -f -r -- /tmp/.systemd/.mips /sbin/bcrond
            2⤵
            • Reads runtime system information
            • System Network Configuration Discovery
            PID:735
          • /usr/bin/tee
            tee -a /etc/cron.d/ntpdate /etc/cron.daily/ntpdate /etc/cron.hourly/ntpdate /etc/cron.monthly/ntpdate /etc/cron.weekly/ntpdate
            2⤵
            • Creates/modifies Cron job
            PID:737
          • /bin/chmod
            chmod +x /etc/cron.daily/ntpdate /etc/cron.d/ntpdate /etc/cron.hourly/ntpdate /etc/cron.monthly/ntpdate /etc/cron.weekly/ntpdate /sbin/bcrond
            2⤵
            • File and Directory Permissions Modification
            PID:738
          • /usr/bin/chattr
            chattr +i +a /etc/cron.daily/ntpdate /etc/cron.d/ntpdate /etc/cron.hourly/ntpdate /etc/cron.monthly/ntpdate /etc/cron.weekly/ntpdate /sbin/bcrond
            2⤵
            • Attempts to change immutable files
            PID:739
          • /usr/bin/chattr
            chattr -a -i /sbin/bsysd
            2⤵
            • Attempts to change immutable files
            PID:741
          • /bin/rm
            rm -rf /sbin/bsysd
            2⤵
              PID:742
            • /usr/bin/which
              which systemctl
              2⤵
                PID:743
              • /usr/bin/chattr
                chattr -i -a /sbin/entpdate /sbin/bsysde
                2⤵
                • Attempts to change immutable files
                PID:744
              • /bin/rm
                rm -rf /sbin/bsysde
                2⤵
                  PID:745
                • /bin/cp
                  cp -f -r -- /tmp/.systemd/.mips /sbin/bsysde
                  2⤵
                  • Reads runtime system information
                  • System Network Configuration Discovery
                  PID:746
                • /usr/bin/tee
                  tee -a /sbin/entpdate
                  2⤵
                  • Writes file to system bin folder
                  PID:748
                • /bin/chmod
                  chmod +x /sbin/entpdate
                  2⤵
                  • File and Directory Permissions Modification
                  PID:749
                • /usr/bin/chattr
                  chattr +i +a /sbin/entpdate /sbin/bsysde
                  2⤵
                  • Attempts to change immutable files
                  PID:750
                • /usr/bin/which
                  which systemctl
                  2⤵
                    PID:751
                  • /usr/bin/chattr
                    chattr -i -a /sbin/lntpdate /sbin/bsysdl
                    2⤵
                    • Attempts to change immutable files
                    PID:752
                  • /bin/rm
                    rm -rf /sbin/bsysdl
                    2⤵
                      PID:753
                    • /bin/cp
                      cp -f -r -- /tmp/.systemd/.mips /sbin/bsysdl
                      2⤵
                      • Reads runtime system information
                      • System Network Configuration Discovery
                      PID:754
                    • /usr/bin/tee
                      tee -a /sbin/lntpdate
                      2⤵
                      • Writes file to system bin folder
                      PID:756
                    • /bin/chmod
                      chmod +x /sbin/lntpdate
                      2⤵
                      • File and Directory Permissions Modification
                      PID:757
                    • /usr/bin/chattr
                      chattr +i +a /sbin/lntpdate /sbin/bsysdl
                      2⤵
                      • Attempts to change immutable files
                      PID:758
                    • /usr/bin/which
                      which update-rc.d
                      2⤵
                        PID:759
                      • /usr/bin/chattr
                        chattr -i -a /etc/init.d/ntpdate /sbin/binitd
                        2⤵
                        • Attempts to change immutable files
                        PID:760
                      • /bin/rm
                        rm -rf /sbin/binitd
                        2⤵
                          PID:761
                        • /bin/cp
                          cp -f -r -- /tmp/.systemd/.mips /sbin/binitd
                          2⤵
                          • Reads runtime system information
                          • System Network Configuration Discovery
                          PID:762
                        • /usr/bin/tee
                          tee -a /etc/init.d/ntpdate
                          2⤵
                          • Modifies init.d
                          PID:764
                        • /bin/chmod
                          chmod +x /etc/init.d/ntpdate /sbin/binitd
                          2⤵
                          • File and Directory Permissions Modification
                          PID:765
                        • /usr/bin/chattr
                          chattr +i +a /etc/init.d/ntpdate /sbin/binitd
                          2⤵
                          • Attempts to change immutable files
                          PID:766
                        • /usr/bin/which
                          which chkconfig
                          2⤵
                            PID:767

                        Network

                        MITRE ATT&CK Enterprise v15

                        Replay Monitor

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                        Downloads

                        • /etc/cron.d/ntpdate

                          Filesize

                          365B

                          MD5

                          755700d11d59e0daeb4f6452aee1ad5d

                          SHA1

                          6b1194921376bef9c7559629712772a11e78eaa4

                          SHA256

                          1b311adac81faa8f9bf687306192ff84c2ee12a9337dd1051c55004ce39a2b00

                          SHA512

                          446f3d05218fa12190dadd2f405345b9a5581221064314e8bce54b155c08ad9bdba17d15f6959e5eb987baaffa309cfb19bf92a1a944d580f66419060a44b2b7

                        • /etc/init.d/ntpdate

                          Filesize

                          365B

                          MD5

                          bd99a962d94b5b4c32f8b7c8ca1f9ea9

                          SHA1

                          af33dc04d1f16e5ccceb2c0569b26e45bb65b32b

                          SHA256

                          64e489965b3914b15f92dadd851560e95287a40923b6cc93849e0758cdbf8b28

                          SHA512

                          fc2f81575bab833e76f070a45c3b9a1a32bb3c19084166c0beed3d03694d38295f6761af1599169f84a2c6f4b8c8bd8e1d8230796191de84dda52edd6899cdfa

                        • /sbin/entpdate

                          Filesize

                          365B

                          MD5

                          4aeb6335d69473274691f59dc2096cfe

                          SHA1

                          440755e42aa67c6ab3e636aeb1e8ec9463cd7ffc

                          SHA256

                          87095fcf498e832162baa13ecd28367155d8a1b5d02aee9ec1b60e149a871785

                          SHA512

                          23b0ef7f02e090cae5b7c20f8b06f4c450e6e8ddc49f3df9c49d223aa2df36339bb92df56e4609240d5e2066ee328db0abebd38de4b3eef304e83e72f4f1886c

                        • /sbin/lntpdate

                          Filesize

                          365B

                          MD5

                          3748e897538baafbc7b260b4d2fbc98f

                          SHA1

                          41d179e3cfc4c1820ea2c0fed0d50009564db79b

                          SHA256

                          ebcbd097cd86e990591360d56f077f37de35fd6f4ce222c6d286f2f7e1024cc7

                          SHA512

                          23519c47db8c96ed72be6833778013df9199bb6d243e989fca2a75dd55d2a5aca37228fc19b0e2537cb5e10a27d69815edc5b640c8e878d7e767559904eaccea

                        • /tmp/.systemd/systemd.dir

                          Filesize

                          14B

                          MD5

                          1f3a48ead214b69a4e5bbcc12a732ddb

                          SHA1

                          3391a93f27a805c58de438e5a50267af13b619ab

                          SHA256

                          8ebe6ec5aee16e2d6ea3fe45a22e72ad8f936a83a7fc9e82591885bcb45e322c

                          SHA512

                          386b19da83f4b8416d17960a3c0832b38521a3396dbf99501dcf03811e17d1696b18db4131f66375889afc2c44d791dd62239a86d3ba0fa614b8547480a7381d