Overview

overview

10

Static

static

10

bash.elf

ubuntu-18.04-amd64

10

Sharing

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General

  • Target
    bash.elf
  • Size 88KB
  • Sample260915-gw92csscnc
  • SHA256 7eb420b8676a35cc75e252c37cd1d70fdf1c9f0ce83574696dd2516a293bb28f
  • MD5 SHA1 SHA512 SSDEEP TLSH
Score
10/10
gafgytbotnetdefense_evasiondiscoveryexecutionlinuxpersistenceprivilege_escalation

Malware Config

Extracted

Family

  • gafgyt

C2

  • 64.89.160.222:55487

Targets

    • Target
      bash.elf
    • Size 88KB
    • SHA256 7eb420b8676a35cc75e252c37cd1d70fdf1c9f0ce83574696dd2516a293bb28f
    • MD5 SHA1 SHA512 SSDEEP TLSH
    Score
    10/10
    botnetdefense_evasiondiscoveryexecutiongafgytpersistenceprivilege_escalation

    • Detected Gafgyt variant

    • Family: Gafgyt/Bashlite

      IoT botnet with numerous variants first seen in 2014.

      botnetgafgyt

    • File and Directory Permissions Modification

      Adversaries may modify file or directory permissions to evade defenses.

      defense_evasion

    • Creates/modifies Cron job

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

      executionpersistenceprivilege_escalation

    • Creates/modifies environment variables

      Creating/modifying environment variables is a common persistence mechanism.

      persistenceprivilege_escalationdefense_evasion

    • Enumerates running processes

      Discovers information about currently running processes on the system

    • Modifies init.d

      Adds/modifies system service, likely for persistence.

      persistence

    • Modifies rc script

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

      persistence

    • Modifies systemd

      Adds/ modifies systemd service files. Likely to achieve persistence.

      persistenceprivilege_escalation

    • Reads system routing table

      Gets active network interfaces from /proc virtual filesystem.

      discovery

    • Schedules an At job

      Schedules a job to be run using the at command.

      executionpersistenceprivilege_escalation

    • Modifies Bash startup script

      persistence
    behavioral1

MITRE ATT&CK Enterprise v16

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

2
T1053

At

1
T1053.002

Cron

1
T1053.003

Persistence

Boot or Logon Autostart Execution

4
T1547

XDG Autostart Entries

1
T1547.013

Boot or Logon Initialization Scripts

2
T1037

RC Scripts

2
T1037.004

Create or Modify System Process

1
T1543

Systemd Service

1
T1543.002

Event Triggered Execution

1
T1546

Unix Shell Configuration Modification

1
T1546.004

Hijack Execution Flow

1
T1574

Path Interception by PATH Environment Variable

1
T1574.007

Scheduled Task/Job

2
T1053

At

1
T1053.002

Cron

1
T1053.003

Privilege Escalation

Boot or Logon Autostart Execution

4
T1547

XDG Autostart Entries

1
T1547.013

Boot or Logon Initialization Scripts

2
T1037

RC Scripts

2
T1037.004

Create or Modify System Process

1
T1543

Systemd Service

1
T1543.002

Event Triggered Execution

1
T1546

Unix Shell Configuration Modification

1
T1546.004

Hijack Execution Flow

1
T1574

Path Interception by PATH Environment Variable

1
T1574.007

Scheduled Task/Job

2
T1053

At

1
T1053.002

Cron

1
T1053.003

Defense Evasion

File and Directory Permissions Modification

1
T1222

Linux and Mac File and Directory Permissions Modification

1
T1222.002

Hijack Execution Flow

1
T1574

Path Interception by PATH Environment Variable

1
T1574.007

Credential Access

Discovery

System Network Configuration Discovery

2
T1016

Internet Connection Discovery

2
T1016.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Tasks