Overview

overview

10

Static

static

5

Linux_amd64

ubuntu-18.04-amd64

10

Analysis

  • max time kernel
    149s
  • max time network
    150s
  • platform
    ubuntu-18.04_amd64
  • resource
    ubuntu1804-amd64-20261019-en
  • resource tags

    arch:amd64arch:i386image:ubuntu1804-amd64-20261019-enkernel:4.15.0-213-genericlocale:en-usos:ubuntu-18.04-amd64system
  • submitted
    09/11/2026, 06:12

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General

  • Target
    Linux_amd64
  • Size 2.3MB
  • Sample261109-gx9f8axtcx
  • SHA256 a8875c3bad30270efe07611b8f68546d6cb6ab19f0105319ebaba0d624bab0bf
  • MD5 SHA1 SHA512 SSDEEP TLSH
Score
10/10
antivmbotnetdiscoveryexecutionstealthworkerpersistenceprivilege_escalation

Malware Config

Extracted

Family

  • stealthworker

Signatures

  • Family: StealthWorker

    StealthWorker is golang-based brute force malware.

    botnetstealthworker
  • Creates/modifies Cron job 1 TTPs 1 IoCs

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

    executionpersistenceprivilege_escalation
  • Checks CPU configuration 1 TTPs 2 IoCs

    Checks CPU information which indicate if the system is a virtual machine.

    antivm
  • Reads runtime system information 6 IoCs

    Reads data from /proc virtual filesystem.

    discovery
  • System Network Configuration Discovery 1 TTPs 1 IoCs

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

    discovery
  • Writes file to tmp directory 3 IoCs

    Malware often drops required files in the /tmp directory.

Processes

  • /tmp/Linux_amd64
    /tmp/Linux_amd64
    1⤵
    • Reads runtime system information
    • Writes file to tmp directory
    PID:1519
    • /bin/cat
      cat /proc/version
      2⤵
      • Reads runtime system information
      PID:1530
    • /bin/cat
      cat /proc/cpuinfo
      2⤵
      • Checks CPU configuration
      PID:1532
    • /bin/uname
      uname -a
      2⤵
        PID:1533
      • /usr/bin/getconf
        getconf LONG_BIT
        2⤵
          PID:1535
        • /tmp/Linux_amd64
          "[stealth]"
          2⤵
          • Reads runtime system information
          • Writes file to tmp directory
          PID:1536
          • /bin/cat
            cat /proc/version
            3⤵
            • Reads runtime system information
            PID:1540
          • /bin/cat
            cat /proc/cpuinfo
            3⤵
            • Checks CPU configuration
            PID:1542
          • /bin/uname
            uname -a
            3⤵
              PID:1543
            • /usr/bin/getconf
              getconf LONG_BIT
              3⤵
                PID:1545
              • /usr/bin/crontab
                /usr/bin/crontab /tmp/nip9iNeiph5chee
                3⤵
                • Creates/modifies Cron job
                • System Network Configuration Discovery
                PID:1546

          Network

                MITRE ATT&CK Enterprise v16

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                Downloads

                .pid
                • Path /tmp/.pid
                • Size 4B
                • SHA256 b51e45a12fbae3d0ee2bf77f1a4f80cbf642e2b4d1c237d2c0f7053a54f6b388
                • MD5 SHA1 SHA512
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                nip9iNeiph5chee
                • Path /tmp/nip9iNeiph5chee
                • Size 45B
                • SHA256 6ae5fc02caccbcd52e2af2667ef735f70724e9cd0bebe42eaba54d1664782a3f
                • MD5 SHA1 SHA512
                Submit Download

                tmp.gGI7aU
                • Path /var/spool/cron/crontabs/tmp.gGI7aU
                • Size 239B
                • SHA256 3bbf7f8694e9d5d038f3a6cb6813e02768537bf9a8d99b206d841bd9b1cdc04d
                • MD5 SHA1 SHA512 TLSH
                Submit Download