Overview

overview

10

Static

static

5

Linux_amd64

ubuntu-18.04-amd64

10

Analysis

  • max time kernel
    140s
  • max time network
    155s
  • 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
    04/06/2026, 18:16

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General

  • Target
    Linux_amd64
  • Size 2.3MB
  • Sample260604-wwfvvact7p
  • 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:1482
    • /bin/cat
      cat /proc/version
      2⤵
      • Reads runtime system information
      PID:1493
    • /bin/cat
      cat /proc/cpuinfo
      2⤵
      • Checks CPU configuration
      PID:1495
    • /bin/uname
      uname -a
      2⤵
        PID:1496
      • /usr/bin/getconf
        getconf LONG_BIT
        2⤵
          PID:1498
        • /tmp/Linux_amd64
          "[stealth]"
          2⤵
          • Reads runtime system information
          • Writes file to tmp directory
          PID:1499
          • /bin/cat
            cat /proc/version
            3⤵
            • Reads runtime system information
            PID:1503
          • /bin/cat
            cat /proc/cpuinfo
            3⤵
            • Checks CPU configuration
            PID:1505
          • /bin/uname
            uname -a
            3⤵
              PID:1507
            • /usr/bin/getconf
              getconf LONG_BIT
              3⤵
                PID:1508
              • /usr/bin/crontab
                /usr/bin/crontab /tmp/nip9iNeiph5chee
                3⤵
                • Creates/modifies Cron job
                • System Network Configuration Discovery
                PID:1509

          Network

                MITRE ATT&CK Enterprise v16

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                Downloads

                .pid
                • Path /tmp/.pid
                • Size 4B
                • SHA256 a3d0c75739a3c6a80dcb6f9d71f9da29b49b62995801bc52957e06acb87db33d
                • MD5 SHA1 SHA512
                Submit Download

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

                tmp.ESbQPg
                • Path /var/spool/cron/crontabs/tmp.ESbQPg
                • Size 239B
                • SHA256 d2ee203535ae757e801247bbd8a9e3fd423ee5fb199126271402d273492a8a67
                • MD5 SHA1 SHA512 TLSH
                Submit Download