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Linux Analysis Report
na.elf

Overview

General Information

Sample name:	na.elf
Analysis ID:	1531478
MD5:	2509b15d2088dea8a3de7780b18ac61e
SHA1:	af46d28dfa37433fee08669b92110222e97177db
SHA256:	d81c2d46fa386e3fec3e5820545e68f3876f313c5b4f7caf53aabb7c54517751
Tags:	elfuser-abuse_ch
Infos:

Detection

Score:	0
Range:	0 - 100
Whitelisted:	false

Signatures

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

Classification

General Information

Joe Sandbox version:	41.0.0 Charoite
Analysis ID:	1531478
Start date and time:	2024-10-11 10:41:41 +02:00
Joe Sandbox product:	CloudBasic
Overall analysis duration:	0h 4m 18s
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:	clean0.linELF@0/0@2/0

Warnings

VT rate limit hit for: na.elf

Runtime Messages

Command:	/tmp/na.elf
PID:	5434
Exit Code:	135
Exit Code Info:
Killed:	False
Standard Output:
Standard Error:

Process Tree

system is lnxubuntu20

na.elf (PID: 5434, Parent: 5356, 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: classification engine

Classification label: clean0.linELF@0/0@2/0

Source: /tmp/na.elf (PID: 5434)

Queries kernel information via 'uname':

Jump to behavior

Source: na.elf, 5434.1.00007ffdb4034000.00007ffdb4055000.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, 5434.1.0000556ba9132000.0000556ba923e000.rw-.sdmp	Binary or memory string: kUrg.qemu.gdb.arm.sys.regs">
Source: na.elf, 5434.1.0000556ba9132000.0000556ba923e000.rw-.sdmp	Binary or memory string: /etc/qemu-binfmt/arm
Source: na.elf, 5434.1.00007ffdb4034000.00007ffdb4055000.rw-.sdmp	Binary or memory string: /usr/bin/qemu-arm
Source: na.elf, 5434.1.0000556ba9132000.0000556ba923e000.rw-.sdmp	Binary or memory string: kU!/etc/qemu-binfmt/arm
Source: na.elf, 5434.1.0000556ba9132000.0000556ba923e000.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	Windows Management Instrumentation	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

Source	Detection	Scanner	Label	Link
na.elf	11%	ReversingLabs	Linux.Trojan.Generic

Dropped Files

⊘No Antivirus matches

Domains

⊘No Antivirus matches

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		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	na.elf	Get hash	malicious	Unknown	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	162.213.35.24
	na.elf	Get hash	malicious	Unknown	Browse	162.213.35.25
	na.elf	Get hash	malicious	Unknown	Browse	162.213.35.25
	na.elf	Get hash	malicious	Mirai	Browse	162.213.35.24
	na.elf	Get hash	malicious	Unknown	Browse	162.213.35.25
	na.elf	Get hash	malicious	Unknown	Browse	162.213.35.25
	na.elf	Get hash	malicious	Unknown	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):	6.157419513714053
TrID:	ELF Executable and Linkable format (generic) (4004/1) 100.00%
File name:	na.elf
File size:	307'091 bytes
MD5:	2509b15d2088dea8a3de7780b18ac61e
SHA1:	af46d28dfa37433fee08669b92110222e97177db
SHA256:	d81c2d46fa386e3fec3e5820545e68f3876f313c5b4f7caf53aabb7c54517751
SHA512:	b2cebd73e05f7869bd1b1b58f666e5e04b2ae48276e1a290343d7724092fc10ceb2daa5cbb6085258eac7a6b8a9a99d889c67af2cca268cb715226dbd1444c71
SSDEEP:	6144:00T9VP62wHeeO6UhfRWias1iAkVSAi7kvA6j9xazk8M:00Bw2wHeeJgR3asIAksAi0uK
TLSH:	46643B5BB9505BB6C2C417BBBB5DC75833131B78C7DF7002CE086A2936DB95A0E2B981
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 11, 2024 10:42:26.389715910 CEST	46787	53	192.168.2.13	1.1.1.1
Oct 11, 2024 10:42:26.389772892 CEST	57946	53	192.168.2.13	1.1.1.1
Oct 11, 2024 10:42:26.397078991 CEST	53	57946	1.1.1.1	192.168.2.13
Oct 11, 2024 10:42:26.397099972 CEST	53	46787	1.1.1.1	192.168.2.13

DNS Queries

Timestamp	Source IP	Dest IP	Trans ID	OP Code	Name	Type	Class	DNS over HTTPS
Oct 11, 2024 10:42:26.389715910 CEST	192.168.2.13	1.1.1.1	0xcaea	Standard query (0)	daisy.ubuntu.com	A (IP address)	IN (0x0001)	false
Oct 11, 2024 10:42:26.389772892 CEST	192.168.2.13	1.1.1.1	0x38b0	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 11, 2024 10:42:26.397099972 CEST	1.1.1.1	192.168.2.13	0xcaea	No error (0)	daisy.ubuntu.com		162.213.35.25	A (IP address)	IN (0x0001)	false
Oct 11, 2024 10:42:26.397099972 CEST	1.1.1.1	192.168.2.13	0xcaea	No error (0)	daisy.ubuntu.com		162.213.35.24	A (IP address)	IN (0x0001)	false

System Behavior

Analysis Process: na.elf PID: 5434, Parent PID: 5356

General

Start time (UTC):	08:42:23
Start date (UTC):	11/10/2024
Path:	/tmp/na.elf
Arguments:	/tmp/na.elf
File size:	4956856 bytes
MD5 hash:	5ebfcae4fe2471fcc5695c2394773ff1

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

Warnings

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: 5434, Parent PID: 5356

General

Chronological Activities

Linux Analysis Report
na.elf