Malware Analysis Report

2025-04-03 19:18

Sample ID 241029-ts5cxswhpr
Target main (3).cs
SHA256 898d74c69d452013bdd9864c5b4b030cc6caa1ab90699cd0e6f39758b52f87e2
Tags
antivm discovery
score
4/10

Table of Contents

Analysis Overview

MITRE ATT&CK

Enterprise Matrix V15

Analysis: static1

Detonation Overview

Signatures

Analysis: behavioral4

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis: behavioral1

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis: behavioral2

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis: behavioral3

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis Overview

score
4/10

SHA256

898d74c69d452013bdd9864c5b4b030cc6caa1ab90699cd0e6f39758b52f87e2

Threat Level: Likely benign

The file main (3).cs was found to be: Likely benign.

Malicious Activity Summary

antivm discovery

Checks CPU configuration

Reads CPU attributes

Changes its process name

Enumerates kernel/hardware configuration

Reads runtime system information

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-10-29 16:20

Signatures

N/A

Analysis: behavioral4

Detonation Overview

Submitted

2024-10-29 16:20

Reported

2024-10-29 16:34

Platform

debian9-mipsel-20240611-en

Max time kernel

15s

Command Line

[nodejs /tmp/main (3).js]

Signatures

Changes its process name

Description Indicator Process Target
Changes the process name, possibly in an attempt to hide itself V8 WorkerThread /usr/bin/nodejs N/A
Changes the process name, possibly in an attempt to hide itself V8 WorkerThread /usr/bin/nodejs N/A
Changes the process name, possibly in an attempt to hide itself V8 WorkerThread /usr/bin/nodejs N/A
Changes the process name, possibly in an attempt to hide itself V8 WorkerThread /usr/bin/nodejs N/A

Checks CPU configuration

antivm
Description Indicator Process Target
File opened for reading /proc/cpuinfo /usr/bin/nodejs N/A

Processes

/usr/bin/nodejs

[nodejs /tmp/main (3).js]

Network

N/A

Files

N/A

Analysis: behavioral1

Detonation Overview

Submitted

2024-10-29 16:20

Reported

2024-10-29 16:31

Platform

ubuntu1804-amd64-20240611-en

Max time kernel

0s

Max time network

479s

Command Line

[node /tmp/main (3).js]

Signatures

Enumerates kernel/hardware configuration

discovery
Description Indicator Process Target
File opened for reading /sys/fs/cgroup/memory/memory.limit_in_bytes /usr/bin/node N/A

Reads runtime system information

discovery
Description Indicator Process Target
File opened for reading /proc/meminfo /usr/bin/node N/A

Processes

/usr/bin/node

[node /tmp/main (3).js]

Network

Country Destination Domain Proto
GB 185.125.188.61:443 tcp
GB 185.125.188.62:443 tcp
US 151.101.129.91:443 tcp
US 151.101.129.91:443 tcp
N/A 224.0.0.251:5353 udp
GB 89.187.167.5:443 tcp
US 1.1.1.1:53 connectivity-check.ubuntu.com udp
US 1.1.1.1:53 connectivity-check.ubuntu.com udp
GB 185.125.190.96:80 connectivity-check.ubuntu.com tcp
US 1.1.1.1:53 connectivity-check.ubuntu.com udp
US 1.1.1.1:53 connectivity-check.ubuntu.com udp
US 91.189.91.48:80 connectivity-check.ubuntu.com tcp

Files

N/A

Analysis: behavioral2

Detonation Overview

Submitted

2024-10-29 16:20

Reported

2024-10-29 16:32

Platform

debian9-armhf-20240611-en

Max time kernel

4s

Command Line

[node /tmp/main (3).js]

Signatures

Checks CPU configuration

antivm
Description Indicator Process Target
File opened for reading /proc/cpuinfo /usr/bin/node N/A

Reads CPU attributes

discovery
Description Indicator Process Target
File opened for reading /sys/devices/system/cpu/online /usr/bin/node N/A

Enumerates kernel/hardware configuration

discovery
Description Indicator Process Target
File opened for reading /sys/fs/cgroup/memory/memory.limit_in_bytes /usr/bin/node N/A

Reads runtime system information

discovery
Description Indicator Process Target
File opened for reading /proc/meminfo /usr/bin/node N/A

Processes

/usr/bin/node

[node /tmp/main (3).js]

Network

N/A

Files

N/A

Analysis: behavioral3

Detonation Overview

Submitted

2024-10-29 16:20

Reported

2024-10-29 16:33

Platform

debian9-mipsbe-20240729-en

Max time kernel

10s

Command Line

[nodejs /tmp/main (3).js]

Signatures

Changes its process name

Description Indicator Process Target
Changes the process name, possibly in an attempt to hide itself V8 WorkerThread /usr/bin/nodejs N/A
Changes the process name, possibly in an attempt to hide itself V8 WorkerThread /usr/bin/nodejs N/A
Changes the process name, possibly in an attempt to hide itself V8 WorkerThread /usr/bin/nodejs N/A
Changes the process name, possibly in an attempt to hide itself V8 WorkerThread /usr/bin/nodejs N/A

Checks CPU configuration

antivm
Description Indicator Process Target
File opened for reading /proc/cpuinfo /usr/bin/nodejs N/A

Processes

/usr/bin/nodejs

[nodejs /tmp/main (3).js]

Network

N/A

Files

N/A