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Linux Analysis Report
na.elf

Overview

General Information

Sample name:	na.elf
Analysis ID:	1528910
MD5:	87ca9a896948456cd969aa47d08fc3a8
SHA1:	54f2a05476b34612c9614ac729c06fa4d01162f5
SHA256:	24a0f22f18dd22152a6cd1367589715da61f1d87dde2ddbb4a884e017fc8b036
Tags:	elfuser-abuse_ch
Infos:

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:	1528910
Start date and time:	2024-10-08 12:58:11 +02:00
Joe Sandbox product:	CloudBasic
Overall analysis duration:	0h 4m 25s
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@2/0

Runtime Messages

Command:	/tmp/na.elf
PID:	5489
Exit Code:	135
Exit Code Info:
Killed:	False
Standard Output:
Standard Error:

Process Tree

system is lnxubuntu20

na.elf (PID: 5489, Parent: 5413, 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: unknown	UDP traffic detected without corresponding DNS query: 1.1.1.1
Source: unknown	UDP traffic detected without corresponding DNS query: 1.1.1.1

Source: global traffic

DNS traffic detected: DNS query: daisy.ubuntu.com

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@2/0

Source: /tmp/na.elf (PID: 5489)

Queries kernel information via 'uname':

Jump to behavior

Source: na.elf, 5489.1.00007ffdf621f000.00007ffdf6240000.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, 5489.1.000055845c553000.000055845c65f000.rw-.sdmp	Binary or memory string: U!/etc/qemu-binfmt/arm
Source: na.elf, 5489.1.000055845c553000.000055845c65f000.rw-.sdmp	Binary or memory string: Urg.qemu.gdb.arm.sys.regs">
Source: na.elf, 5489.1.000055845c553000.000055845c65f000.rw-.sdmp	Binary or memory string: /etc/qemu-binfmt/arm
Source: na.elf, 5489.1.00007ffdf621f000.00007ffdf6240000.rw-.sdmp	Binary or memory string: /usr/bin/qemu-arm
Source: na.elf, 5489.1.000055845c553000.000055845c65f000.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	1 Non-Application Layer Protocol	Exfiltration Over Other Network Medium	Abuse Accessibility Features
Credentials	Domains	Default Accounts	Scheduled Task/Job	Boot or Logon Initialization Scripts	Boot or Logon Initialization Scripts	Rootkit	LSASS Memory	Application Window Discovery	Remote Desktop Protocol	Data from Removable Media	1 Application Layer Protocol	Exfiltration Over Bluetooth	Network Denial of Service

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

Antivirus, Machine Learning and Genetic Malware Detection

Initial Sample

⊘No Antivirus matches

Dropped Files

⊘No Antivirus matches

Domains

Source	Detection	Scanner	Label	Link
daisy.ubuntu.com	0%	Virustotal		Browse

URLs

⊘No Antivirus matches

Domains and IPs

Contacted Domains

Name	IP	Active	Malicious	Antivirus Detection	Reputation
daisy.ubuntu.com	162.213.35.25	true	false	0%, Virustotal, Browse	unknown

World Map of Contacted IPs

⊘No contacted IP infos

Joe Sandbox View / Context

IPs

⊘No context

Domains

Match	Associated Sample Name / URL	SHA 256	Detection	Threat Name	Link	Context
daisy.ubuntu.com	logrotate_malware.elf	Get hash	malicious	Xmrig	Browse	162.213.35.25
	na.elf	Get hash	malicious	Unknown	Browse	162.213.35.25
	na.elf	Get hash	malicious	Unknown	Browse	162.213.35.24
	na.elf	Get hash	malicious	Unknown	Browse	162.213.35.25
	na.elf	Get hash	malicious	Unknown	Browse	162.213.35.24
	na.elf	Get hash	malicious	Mirai	Browse	162.213.35.25
	na.elf	Get hash	malicious	Mirai	Browse	162.213.35.25
	na.elf	Get hash	malicious	Unknown	Browse	162.213.35.24
	na.elf	Get hash	malicious	Mirai	Browse	162.213.35.25

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):	6.150775705242597
TrID:	ELF Executable and Linkable format (generic) (4004/1) 100.00%
File name:	na.elf
File size:	1'044'827 bytes
MD5:	87ca9a896948456cd969aa47d08fc3a8
SHA1:	54f2a05476b34612c9614ac729c06fa4d01162f5
SHA256:	24a0f22f18dd22152a6cd1367589715da61f1d87dde2ddbb4a884e017fc8b036
SHA512:	14dbb8a8d071b85138bc1b9a447bd1143df470c4a1c0791c92cb2ab47cd85308d37379f8bb684a89ed20bc9281b87c62b51b854e557df09659d5d79ba23de1b1
SSDEEP:	12288:00Bw2wHeeJgR3asIAksAi0uObzkzOgFr1qwRcFjV1D7a9KbsaKjpeFmz4T1:00BnRED/TwOjX0a5xT1
TLSH:	E0256C56F9808EA2C5D8177BB75DC35833134B78D7DEB102CD08672877AB94A0E7B982
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

Network Port Distribution

UDP Packets

Timestamp	Source Port	Dest Port	Source IP	Dest IP
Oct 8, 2024 12:58:58.192706108 CEST	34635	53	192.168.2.14	1.1.1.1
Oct 8, 2024 12:58:58.192759991 CEST	43742	53	192.168.2.14	1.1.1.1
Oct 8, 2024 12:58:58.200251102 CEST	53	43742	1.1.1.1	192.168.2.14
Oct 8, 2024 12:58:58.202059031 CEST	53	34635	1.1.1.1	192.168.2.14

DNS Queries

Timestamp	Source IP	Dest IP	Trans ID	OP Code	Name	Type	Class	DNS over HTTPS
Oct 8, 2024 12:58:58.192706108 CEST	192.168.2.14	1.1.1.1	0xeb72	Standard query (0)	daisy.ubuntu.com	A (IP address)	IN (0x0001)	false
Oct 8, 2024 12:58:58.192759991 CEST	192.168.2.14	1.1.1.1	0x6a92	Standard query (0)	daisy.ubuntu.com	28	IN (0x0001)	false

DNS Answers

Timestamp	Source IP	Dest IP	Trans ID	Reply Code	Name	CName	Address	Type	Class	DNS over HTTPS
Oct 8, 2024 12:58:58.202059031 CEST	1.1.1.1	192.168.2.14	0xeb72	No error (0)	daisy.ubuntu.com		162.213.35.25	A (IP address)	IN (0x0001)	false
Oct 8, 2024 12:58:58.202059031 CEST	1.1.1.1	192.168.2.14	0xeb72	No error (0)	daisy.ubuntu.com		162.213.35.24	A (IP address)	IN (0x0001)	false

System Behavior

Analysis Process: na.elf PID: 5489, Parent PID: 5413

General

Start time (UTC):	10:58:55
Start date (UTC):	08/10/2024
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

Description:	Adversaries may use an OSI non-application layer protocol for communication between host and C2 server or among infected hosts within a network. The list of possible protocols is extensive.Specific examples include use of network layer protocols, such as the Internet Control Message Protocol (ICMP), transport layer protocols, such as the User Datagram Protocol (UDP), session layer protocols, such as Socket Secure (SOCKS), as well as redirected/tunneled protocols, such as Serial over LAN (SOL).
Tactics:	Command and Control
Data Sources:	Network Traffic: Network Traffic Content, Network Traffic: Network Traffic Flow
Platforms:	Linux, macOS, Network, Windows
Url:	Open detailed description by Mitre

Description:	Adversaries may communicate using OSI application layer protocols to avoid detection/network filtering by blending in with existing traffic. Commands to the remote system, and often the results of those commands, will be embedded within the protocol traffic between the client and server.
Tactics:	Command and Control
Data Sources:	Network Traffic: Network Traffic Content, Network Traffic: Network Traffic Flow
Platforms:	Linux, macOS, 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

Antivirus, Machine Learning and Genetic Malware Detection

Initial Sample

Dropped Files

Domains

URLs

Domains and IPs

Contacted Domains

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

Network Port Distribution

UDP Packets

DNS Queries

DNS Answers

System Behavior

Analysis Process: na.elf PID: 5489, Parent PID: 5413

General

Chronological Activities

Linux Analysis Report
na.elf