Malware Analysis Report

2024-11-16 13:02

Sample ID 231220-t4qnxafgh8
Target ea098fa13658a107dabf7c408674d391
SHA256 1f94e02d6d6f7b445149cd62d8275b7b627a2df507860558f6c374f80dc94fc6
Tags
botnet stealthworker persistence
score
10/10

Table of Contents

Analysis Overview

MITRE ATT&CK

Enterprise Matrix V15

Analysis: static1

Detonation Overview

Signatures

Analysis: behavioral1

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis Overview

score
10/10

SHA256

1f94e02d6d6f7b445149cd62d8275b7b627a2df507860558f6c374f80dc94fc6

Threat Level: Known bad

The file ea098fa13658a107dabf7c408674d391 was found to be: Known bad.

Malicious Activity Summary

botnet stealthworker persistence

StealthWorker payload

Stealthworker family

Creates/modifies Cron job

Reads runtime system information

Writes file to tmp directory

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2023-12-20 16:36

Signatures

StealthWorker payload

botnet
Description Indicator Process Target
N/A N/A N/A N/A

Stealthworker family

stealthworker

Analysis: behavioral1

Detonation Overview

Submitted

2023-12-20 16:36

Reported

2023-12-22 12:38

Platform

ubuntu1804-amd64-20231215-en

Max time kernel

153s

Max time network

156s

Command Line

[/tmp/ea098fa13658a107dabf7c408674d391]

Signatures

Creates/modifies Cron job

persistence
Description Indicator Process Target
File opened for modification /var/spool/cron/crontabs/tmp.QjAKpo /usr/bin/crontab N/A

Reads runtime system information

Description Indicator Process Target
File opened for reading /proc/sys/net/core/somaxconn /tmp/ea098fa13658a107dabf7c408674d391 N/A
File opened for reading /proc/sys/net/core/somaxconn /tmp/ea098fa13658a107dabf7c408674d391 N/A

Writes file to tmp directory

Description Indicator Process Target
File opened for modification /tmp/pid /tmp/ea098fa13658a107dabf7c408674d391 N/A
File opened for modification /tmp/nip9iNeiph5chee /tmp/ea098fa13658a107dabf7c408674d391 N/A
File opened for modification /tmp/[stealth].pid /tmp/ea098fa13658a107dabf7c408674d391 N/A

Processes

/tmp/ea098fa13658a107dabf7c408674d391

[/tmp/ea098fa13658a107dabf7c408674d391]

/tmp/ea098fa13658a107dabf7c408674d391

[[stealth]]

/usr/bin/crontab

[/usr/bin/crontab /tmp/nip9iNeiph5chee]

Network

Country Destination Domain Proto
N/A 224.0.0.251:5353 udp
US 151.101.2.49:443 tcp
US 151.101.193.91:443 tcp
US 1.1.1.1:53 cdn.fwupd.org udp
US 1.1.1.1:53 cdn.fwupd.org udp
US 151.101.194.49:443 cdn.fwupd.org tcp
GB 89.187.167.2:443 tcp
GB 185.125.188.61:443 tcp
GB 185.125.188.62:443 tcp
US 151.101.193.91:443 tcp
BG 185.205.209.131:7000 tcp
BG 185.205.209.131:7000 tcp
US 1.1.1.1:53 1527653184.rsc.cdn77.org udp
US 1.1.1.1:53 1527653184.rsc.cdn77.org udp
GB 89.187.167.7:443 1527653184.rsc.cdn77.org tcp
BG 185.205.209.131:7000 tcp
BG 185.205.209.131:7000 tcp
BG 185.205.209.131:7000 tcp
BG 185.205.209.131:7000 tcp
BG 185.205.209.131:7000 tcp
BG 185.205.209.131:7000 tcp
BG 185.205.209.131:7000 tcp
BG 185.205.209.131:7000 tcp
BG 185.205.209.131:7000 tcp
BG 185.205.209.131:7000 tcp
BG 185.205.209.131:7000 tcp
BG 185.205.209.131:7000 tcp
BG 185.205.209.131:7000 tcp
BG 185.205.209.131:7000 tcp
BG 185.205.209.131:7000 tcp
BG 185.205.209.131:7000 tcp
BG 185.205.209.131:7000 tcp
BG 185.205.209.131:7000 tcp
BG 185.205.209.131:7000 tcp
BG 185.205.209.131:7000 tcp
BG 185.205.209.131:7000 tcp
BG 185.205.209.131:7000 tcp
BG 185.205.209.131:7000 tcp
BG 185.205.209.131:7000 tcp
BG 185.205.209.131:7000 tcp
BG 185.205.209.131:7000 tcp
BG 185.205.209.131:7000 tcp
BG 185.205.209.131:7000 tcp
BG 185.205.209.131:7000 tcp
BG 185.205.209.131:7000 tcp
BG 185.205.209.131:7000 tcp
BG 185.205.209.131:7000 tcp
BG 185.205.209.131:7000 tcp
BG 185.205.209.131:7000 tcp
BG 185.205.209.131:7000 tcp
BG 185.205.209.131:7000 tcp
BG 185.205.209.131:7000 tcp
BG 185.205.209.131:7000 tcp
BG 185.205.209.131:7000 tcp
BG 185.205.209.131:7000 tcp
BG 185.205.209.131:7000 tcp
BG 185.205.209.131:7000 tcp
BG 185.205.209.131:7000 tcp
BG 185.205.209.131:7000 tcp
BG 185.205.209.131:7000 tcp
BG 185.205.209.131:7000 tcp
BG 185.205.209.131:7000 tcp
BG 185.205.209.131:7000 tcp
BG 185.205.209.131:7000 tcp
BG 185.205.209.131:7000 tcp
BG 185.205.209.131:7000 tcp
BG 185.205.209.131:7000 tcp
BG 185.205.209.131:7000 tcp
BG 185.205.209.131:7000 tcp
BG 185.205.209.131:7000 tcp
BG 185.205.209.131:7000 tcp
BG 185.205.209.131:7000 tcp
BG 185.205.209.131:7000 tcp
BG 185.205.209.131:7000 tcp
BG 185.205.209.131:7000 tcp
BG 185.205.209.131:7000 tcp
BG 185.205.209.131:7000 tcp
BG 185.205.209.131:7000 tcp
BG 185.205.209.131:7000 tcp
BG 185.205.209.131:7000 tcp
BG 185.205.209.131:7000 tcp
BG 185.205.209.131:7000 tcp
BG 185.205.209.131:7000 tcp
BG 185.205.209.131:7000 tcp
BG 185.205.209.131:7000 tcp
BG 185.205.209.131:7000 tcp
BG 185.205.209.131:7000 tcp
BG 185.205.209.131:7000 tcp
BG 185.205.209.131:7000 tcp
BG 185.205.209.131:7000 tcp
BG 185.205.209.131:7000 tcp
BG 185.205.209.131:7000 tcp
BG 185.205.209.131:7000 tcp
BG 185.205.209.131:7000 tcp
BG 185.205.209.131:7000 tcp
BG 185.205.209.131:7000 tcp
BG 185.205.209.131:7000 tcp
BG 185.205.209.131:7000 tcp
BG 185.205.209.131:7000 tcp
BG 185.205.209.131:7000 tcp
BG 185.205.209.131:7000 tcp
BG 185.205.209.131:7000 tcp
BG 185.205.209.131:7000 tcp
BG 185.205.209.131:7000 tcp
BG 185.205.209.131:7000 tcp
BG 185.205.209.131:7000 tcp
BG 185.205.209.131:7000 tcp
BG 185.205.209.131:7000 tcp
BG 185.205.209.131:7000 tcp
BG 185.205.209.131:7000 tcp
BG 185.205.209.131:7000 tcp
BG 185.205.209.131:7000 tcp
BG 185.205.209.131:7000 tcp
BG 185.205.209.131:7000 tcp
BG 185.205.209.131:7000 tcp
BG 185.205.209.131:7000 tcp
BG 185.205.209.131:7000 tcp
BG 185.205.209.131:7000 tcp
BG 185.205.209.131:7000 tcp
BG 185.205.209.131:7000 tcp
BG 185.205.209.131:7000 tcp
BG 185.205.209.131:7000 tcp
BG 185.205.209.131:7000 tcp
BG 185.205.209.131:7000 tcp
BG 185.205.209.131:7000 tcp
BG 185.205.209.131:7000 tcp
BG 185.205.209.131:7000 tcp
BG 185.205.209.131:7000 tcp
BG 185.205.209.131:7000 tcp
BG 185.205.209.131:7000 tcp
BG 185.205.209.131:7000 tcp
BG 185.205.209.131:7000 tcp
BG 185.205.209.131:7000 tcp
BG 185.205.209.131:7000 tcp
BG 185.205.209.131:7000 tcp
BG 185.205.209.131:7000 tcp
BG 185.205.209.131:7000 tcp
BG 185.205.209.131:7000 tcp
BG 185.205.209.131:7000 tcp
BG 185.205.209.131:7000 tcp
BG 185.205.209.131:7000 tcp
BG 185.205.209.131:7000 tcp
BG 185.205.209.131:7000 tcp
BG 185.205.209.131:7000 tcp
BG 185.205.209.131:7000 tcp
BG 185.205.209.131:7000 tcp
BG 185.205.209.131:7000 tcp
BG 185.205.209.131:7000 tcp
BG 185.205.209.131:7000 tcp
BG 185.205.209.131:7000 tcp
BG 185.205.209.131:7000 tcp
BG 185.205.209.131:7000 tcp
BG 185.205.209.131:7000 tcp
BG 185.205.209.131:7000 tcp
BG 185.205.209.131:7000 tcp
BG 185.205.209.131:7000 tcp
BG 185.205.209.131:7000 tcp
BG 185.205.209.131:7000 tcp
BG 185.205.209.131:7000 tcp
BG 185.205.209.131:7000 tcp
BG 185.205.209.131:7000 tcp
BG 185.205.209.131:7000 tcp
BG 185.205.209.131:7000 tcp
BG 185.205.209.131:7000 tcp
BG 185.205.209.131:7000 tcp
BG 185.205.209.131:7000 tcp
BG 185.205.209.131:7000 tcp
BG 185.205.209.131:7000 tcp
BG 185.205.209.131:7000 tcp
BG 185.205.209.131:7000 tcp
BG 185.205.209.131:7000 tcp
BG 185.205.209.131:7000 tcp
BG 185.205.209.131:7000 tcp
BG 185.205.209.131:7000 tcp
BG 185.205.209.131:7000 tcp

Files

/tmp/[stealth].pid

MD5 819c9fbfb075d62a16393b9fe4fcbaa5
SHA1 8959169251e7394bcf4b9004326f83e266a06bfb
SHA256 50a0a04f2d67b4a26d3aaa163fa2fb0d80a5457716579587cc45ce5bc89d8fce
SHA512 1a2836932a771fac43e720d14d8df08c3e32ca5d6d335ae38788fa774e05568c6c05a7c5531ab745b8ec7a9d410f7460ea86c3f5fb6fc097a991170cf26feb57