Overview

overview

6

Static

static

1

2026-07-30...pcrypt

ubuntu-18.04-amd64

6

Analysis

  • max time kernel
    120s
  • max time network
    129s
  • 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
    30/07/2026, 22:35

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General

  • Target
    2026-07-30_41921a280efebd6ef6e25ce86beb4c5a_qnapcrypt
  • Size 2.3MB
  • Sample260730-2hphqaydkf
  • SHA256 d8c68be694f53af4a3aa091f398d6f1d410a045b1f4359ec14107d78f2fd6846
  • MD5 SHA1 SHA512 SSDEEP TLSH
Score
6/10
discoveryexecutionpersistenceprivilege_escalation

Malware Config

Signatures

  • Creates/modifies Cron job 1 TTPs 1 IoCs

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

    executionpersistenceprivilege_escalation
  • Modifies rc script 2 TTPs 1 IoCs

    Adding/modifying system rc scripts is a common persistence mechanism.

    persistence
  • Enumerates kernel/hardware configuration 1 TTPs 3 IoCs

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

    discovery
  • Reads runtime system information 20 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/2026-07-30_41921a280efebd6ef6e25ce86beb4c5a_qnapcrypt
    /tmp/2026-07-30_41921a280efebd6ef6e25ce86beb4c5a_qnapcrypt
    1⤵
    • Enumerates kernel/hardware configuration
    • Reads runtime system information
    • Writes file to tmp directory
    PID:1501
    • /bin/sh
      sh -c "crontab -l 2>/dev/null"
      2⤵
        PID:1505
        • /usr/bin/crontab
          crontab -l
          3⤵
            PID:1506
        • /usr/bin/crontab
          crontab -
          2⤵
          • Creates/modifies Cron job
          PID:1507
        • /bin/sh
          sh -c "cat /tmp/rc.local > /etc/rc.local"
          2⤵
          • Modifies rc script
          PID:1510
          • /bin/cat
            cat /tmp/rc.local
            3⤵
              PID:1511
          • /bin/systemctl
            systemctl --user daemon-reload
            2⤵
            • Reads runtime system information
            PID:1512
          • /bin/systemctl
            systemctl --user enable system-service.service
            2⤵
            • Reads runtime system information
            PID:1514
          • /bin/systemctl
            systemctl --user start system-service.service
            2⤵
            • Reads runtime system information
            PID:1516

        Network

              MITRE ATT&CK Enterprise v16

              Replay Monitor

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              Downloads

              system-service.service
              • Path /.config/systemd/user/system-service.service
              • Size 211B
              • SHA256 553f83c29020a65e6c24e1e4687da292c029c33f7b9a8f87312ebb81cb44a43b
              • MD5 SHA1 SHA512 TLSH
              Submit Download

              tmp.wB7zLY
              • Path /var/spool/cron/crontabs/tmp.wB7zLY
              • Size 260B
              • SHA256 b9ad45110871ab4d44066284531c038f38e7ae7026b685446b64735be15f2495
              • MD5 SHA1 SHA512 TLSH
              Submit Download