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Linux Analysis Report
na.elf

Overview

General Information

Sample name:	na.elf
Analysis ID:	1532543
MD5:	e83445627e74888ea1849bbb54660c47
SHA1:	224b7843f35c4337d2236e6e33733372b041978c
SHA256:	45b6b99192b5b49a391de4d4f23070abba00f6b8b96c32b16436982ec472662c
Tags:	elfuser-abuse_ch

Detection

Score:	1
Range:	0 - 100
Whitelisted:	false

Signatures

Sample contains strings that are potentially command strings

Uses the "uname" system call to query kernel version information (possible evasion)

Classification

General Information

Joe Sandbox version:	41.0.0 Charoite
Analysis ID:	1532543
Start date and time:	2024-10-13 16:11:11 +02:00
Joe Sandbox product:	CloudBasic
Overall analysis duration:	0h 4m 26s
Hypervisor based Inspection enabled:	false
Report type:	full
Cookbook file name:	defaultlinuxfilecookbook.jbs
Analysis system description:	Ubuntu Linux 20.04 x64 (Kernel 5.4.0-72, Firefox 91.0, Evince Document Viewer 3.36.10, LibreOffice 6.4.7.2, OpenJDK 11.0.11)
Analysis Mode:	default
Sample name:	na.elf
Detection:	CLEAN
Classification:	clean1.linELF@0/0@0/0

Runtime Messages

Command:	/tmp/na.elf
PID:	5526
Exit Code:	255
Exit Code Info:
Killed:	False
Standard Output:
Standard Error:	/lib/ld-linux-armhf.so.3: No such file or directory

Process Tree

system is lnxubuntu20

na.elf (PID: 5526, Parent: 5444, MD5: 5ebfcae4fe2471fcc5695c2394773ff1) Arguments: /tmp/na.elf

cleanup

Yara Signatures

⊘No yara matches

Suricata Signatures

⊘No Suricata rule has matched

Joe Sandbox Signatures

Click to jump to signature section

Show All Signature Results

There are no malicious signatures, click here to show all signatures.

Source: na.elf	String found in binary or memory: http://www.openssl.org/support/faq.html
Source: na.elf	String found in binary or memory: http://www.openssl.org/support/faq.htmlmd_rand.c

Source: Initial sample	Potential command found: ssh server is locked, please try again %dmin after !!!
Source: Initial sample	Potential command found: X11 forwarding
Source: Initial sample	Potential command found: X11 forwarding disabled in user configuration file.
Source: Initial sample	Potential command found: X11 forwarding disabled in server configuration file.
Source: Initial sample	Potential command found: X11 display already set.
Source: Initial sample	Potential command found: X11 connection requested.
Source: Initial sample	Potential command found: X11 connection from %.200s port %d
Source: Initial sample	Potential command found: X11 connection rejected because of wrong authentication.
Source: Initial sample	Potential command found: X11 rejected %d i%d/o%d
Source: Initial sample	Potential command found: X11 closed %d i%d/o%d
Source: Initial sample	Potential command found: X11 inet listener
Source: Initial sample	Potential command found: X11 connection uses different authentication protocol.
Source: Initial sample	Potential command found: X11 auth data does not match fake data.
Source: Initial sample	Potential command found: X11 fake_data_len %d != saved_data_len %d

Source: classification engine

Classification label: clean1.linELF@0/0@0/0

Source: /tmp/na.elf (PID: 5526)

Queries kernel information via 'uname':

Jump to behavior

Source: na.elf, 5526.1.0000562b4fa48000.0000562b4fb76000.rw-.sdmp	Binary or memory string: O+V!/etc/qemu-binfmt/arm
Source: na.elf, 5526.1.00007ffc2f31b000.00007ffc2f33c000.rw-.sdmp	Binary or memory string: x86_64/usr/bin/qemu-arm/tmp/na.elfSUDO_USER=saturninoPATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/snap/binDISPLAY=:1.0XAUTHORITY=/run/user/1000/gdm/XauthoritySUDO_UID=1000TERM=xterm-256colorCOLORTERM=truecolorLOGNAME=rootUSER=rootLANG=en_US.UTF-8SUDO_COMMAND=/bin/bashHOME=/rootMAIL=/var/mail/rootSUDO_GID=1000SHELL=/bin/bash/tmp/na.elf
Source: na.elf, 5526.1.0000562b4fa48000.0000562b4fb76000.rw-.sdmp	Binary or memory string: O+Vrg.qemu.gdb.arm.sys.regs">
Source: na.elf, 5526.1.00007ffc2f31b000.00007ffc2f33c000.rw-.sdmp	Binary or memory string: qemu: %s: %s
Source: na.elf, 5526.1.00007ffc2f31b000.00007ffc2f33c000.rw-.sdmp	Binary or memory string: leqemu: %s: %s
Source: na.elf, 5526.1.0000562b4fa48000.0000562b4fb76000.rw-.sdmp	Binary or memory string: /etc/qemu-binfmt/arm
Source: na.elf, 5526.1.00007ffc2f31b000.00007ffc2f33c000.rw-.sdmp	Binary or memory string: /usr/bin/qemu-arm
Source: na.elf, 5526.1.0000562b4fa48000.0000562b4fb76000.rw-.sdmp	Binary or memory string: rg.qemu.gdb.arm.sys.regs">

Mitre Att&ck Matrix

Reconnaissance	Resource Development	Initial Access	Execution	Persistence	Privilege Escalation	Defense Evasion	Credential Access	Discovery	Lateral Movement	Collection	Command and Control	Exfiltration	Impact
Gather Victim Identity Information	Acquire Infrastructure	Valid Accounts	1 Command and Scripting Interpreter	Path Interception	Path Interception	Direct Volume Access	OS Credential Dumping	11 Security Software Discovery	Remote Services	Data from Local System	Data Obfuscation	Exfiltration Over Other Network Medium	Abuse Accessibility Features

Malware Configuration

⊘No configs have been found

Behavior Graph

Hide Legend

Legend:

Process
Signature
Created File
DNS/IP Info
Is Dropped
Number of created Files
Is malicious
Internet

Screenshots

Thumbnails

This section contains all screenshots as thumbnails, including those not shown in the slideshow.

Antivirus, Machine Learning and Genetic Malware Detection

Initial Sample

⊘No Antivirus matches

Dropped Files

⊘No Antivirus matches

Domains

⊘No Antivirus matches

URLs

Source	Detection	Scanner	Label	Link
http://www.openssl.org/support/faq.html	0%	URL Reputation	safe
http://www.openssl.org/support/faq.html	0%	URL Reputation	safe

Domains and IPs

Contacted Domains

⊘No contacted domains info

URLs from Memory and Binaries

Name	Source	Malicious	Antivirus Detection	Reputation
http://www.openssl.org/support/faq.htmlmd_rand.c	na.elf	false		unknown
http://www.openssl.org/support/faq.html	na.elf	false	URL Reputation: safe URL Reputation: safe	unknown

World Map of Contacted IPs

⊘No contacted IP infos

Joe Sandbox View / Context

IPs

⊘No context

Domains

⊘No context

ASNs

⊘No context

JA3 Fingerprints

⊘No context

Dropped Files

⊘No context

Created / dropped Files

⊘No created / dropped files found

Static File Info

General

File type:	ELF 32-bit LSB executable, ARM, EABI5 version 1 (SYSV), dynamically linked, interpreter /lib/ld-linux-armhf.so.3, missing section headers at 1110264
Entropy (8bit):	6.239745363472608
TrID:	ELF Executable and Linkable format (generic) (4004/1) 100.00%
File name:	na.elf
File size:	1'106'231 bytes
MD5:	e83445627e74888ea1849bbb54660c47
SHA1:	224b7843f35c4337d2236e6e33733372b041978c
SHA256:	45b6b99192b5b49a391de4d4f23070abba00f6b8b96c32b16436982ec472662c
SHA512:	15d7f04e434bd3467cb46a71858dcf43e62c059cbe6826bea8433e7fed60b098b72b235c8b5f8327139cc14dbb727d560cd3ff8a2e1e7ba8a5a33dc876d7b3f8
SSDEEP:	12288:00Bw2wHeeJgR3asIAksAi0uObzkzOgFr1qwRcFjV1D7a9KbsaKjpeFmz4T28bLvr:00BnRED/TwOjX0a5xTdvr
TLSH:	E4356D56F9808EA2C5D8177BB75DC35833534B78D7DEB102CD08672877AB94A0E3B982
File Content Preview:	.ELF..............(......d..4...p.......4. ...(........pl...l...l.......................4...4...4... ... ...............T...T...T...................................x...x...........................0....m..........................(...(...............p...p..

Network Behavior

⊘No network behavior found

System Behavior

Analysis Process: na.elf PID: 5526, Parent PID: 5444

General

Start time (UTC):	14:12:00
Start date (UTC):	13/10/2024
Path:	/tmp/na.elf
Arguments:	/tmp/na.elf
File size:	4956856 bytes
MD5 hash:	5ebfcae4fe2471fcc5695c2394773ff1

Description:	Adversaries may abuse command and script interpreters to execute commands, scripts, or binaries. These interfaces and languages provide ways of interacting with computer systems and are a common feature across many different platforms. Most systems come with some built-in command-line interface and scripting capabilities, for example, macOS and Linux distributions include some flavor of Unix Shell while Windows installations include the Windows Command Shell and PowerShell .
Tactics:	Execution
Data Sources:	Command: Command Execution, Module: Module Load, Process: Process Creation, Process: Process Metadata, Script: Script Execution
Platforms:	Azure AD, Google Workspace, IaaS, Linux, macOS, Network, Office 365, Windows
Url:	Open detailed description by Mitre

Description:	Adversaries may attempt to get a listing of security software, configurations, defensive tools, and sensors that are installed on a system or in a cloud environment. This may include things such as firewall rules and anti-virus. Adversaries may use the information from Security Software Discovery during automated discovery to shape follow-on behaviors, including whether or not the adversary fully infects the target and/or attempts specific actions.
Tactics:	Discovery
Data Sources:	Command: Command Execution, Firewall: Firewall Enumeration, Firewall: Firewall Metadata, Process: OS API Execution, Process: Process Creation
Platforms:	Azure AD, Google Workspace, IaaS, Linux, macOS, Office 365, SaaS, Windows
Url:	Open detailed description by Mitre

Behavior Section

Behavior Chronological

Disassembly

Uncategorized

Graph

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Linux Analysis Report na.elf

Overview

General Information

Detection

Signatures

Classification

General Information

Runtime Messages

Process Tree

Yara Signatures

Suricata Signatures

Joe Sandbox Signatures

Networking

System Summary

Malware Analysis System Evasion

Mitre Att&ck Matrix

Malware Configuration

Behavior Graph

Screenshots

Thumbnails

Antivirus, Machine Learning and Genetic Malware Detection

Initial Sample

Dropped Files

Domains

URLs

Domains and IPs

Contacted Domains

URLs from Memory and Binaries

World Map of Contacted IPs

Joe Sandbox View / Context

IPs

Domains

ASNs

JA3 Fingerprints

Dropped Files

Created / dropped Files

Static File Info

General

Network Behavior

System Behavior

Analysis Process: na.elf PID: 5526, Parent PID: 5444

General

Chronological Activities

Linux Analysis Report
na.elf