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Linux Analysis Report
arm6.elf

Overview

General Information

Sample name:	arm6.elf
Analysis ID:	1583626
MD5:	97ee7cf90d49a55b4dce1d06269ab602
SHA1:	c39a8cb137c25611282e711069f200c4d2cd8db9
SHA256:	b38f0910b9beb03f34df6dededf8b41cd180858ea977e31045046142df3a625f
Tags:	elfuser-abuse_ch
Infos:

Detection

Mirai

Score:	64
Range:	0 - 100
Whitelisted:	false

Signatures

Antivirus / Scanner detection for submitted sample

Multi AV Scanner detection for submitted file

Yara detected Mirai

Sample has stripped symbol table

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

Classification

General Information

Joe Sandbox version:	41.0.0 Charoite
Analysis ID:	1583626
Start date and time:	2025-01-03 08:18:18 +01:00
Joe Sandbox product:	CloudBasic
Overall analysis duration:	0h 4m 38s
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:	arm6.elf
Detection:	MAL
Classification:	mal64.troj.linELF@0/0@2/0

Runtime Messages

Command:	/tmp/arm6.elf
PID:	5819
Exit Code:	139
Exit Code Info:	SIGSEGV (11) Segmentation fault invalid memory reference
Killed:	False
Standard Output:
Standard Error:	qemu: uncaught target signal 11 (Segmentation fault) - core dumped

Process Tree

system is lnxubuntu20

arm6.elf (PID: 5819, Parent: 5743, MD5: 5ebfcae4fe2471fcc5695c2394773ff1) Arguments: /tmp/arm6.elf

cleanup

Malware Threat Intel

Provided by

Name	Description	Attribution	Blogpost URLs	Link
Mirai	Mirai is one of the first significant botnets targeting exposed networking devices running Linux. Found in August 2016 by MalwareMustDie, its name means "future" in Japanese. Nowadays it targets a wide range of networked embedded devices such as IP cameras, home routers (many vendors involved), and other IoT devices. Since the source code was published on "Hack Forums" many variants of the Mirai family appeared, infecting mostly home networks all around the world.	No Attribution	http://osint.bambenekconsulting.com/feeds/ http://www.simonroses.com/2016/10/mirai-ddos-botnet-source-code-binary-analysis/ https://blog.malwaremustdie.org/2020/02/mmd-0065-2021-linuxmirai-fbot-re.html https://blog.netlab.360.com/another-lilin-dvr-0-day-being-used-to-spread-mirai-en/ https://blog.netlab.360.com/mirai_ptea-botnet-is-exploiting-undisclosed-kguard-dvr-vulnerability-en/	https://malpedia.caad.fkie.fraunhofer.de/details/elf.mirai

Yara Signatures

Initial Sample

Source	Rule	Description	Author	Strings
arm6.elf	JoeSecurity_Mirai_8	Yara detected Mirai	Joe Security

Memory Dumps

Source	Rule	Description	Author	Strings
5819.1.00007fed0c017000.00007fed0c037000.r-x.sdmp	JoeSecurity_Mirai_8	Yara detected Mirai	Joe Security

Suricata Signatures

⊘No Suricata rule has matched

Joe Sandbox Signatures

Click to jump to signature section

Show All Signature Results

AV Detection

Antivirus / Scanner detection for submitted sample

Source: arm6.elf

Avira: detected

Multi AV Scanner detection for submitted file

Source: arm6.elf	Virustotal: Detection: 47%			Perma Link
Source: arm6.elf	ReversingLabs: Detection: 42%

Source: global traffic

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

Source: ELF static info symbol of initial sample

.symtab present: no

Source: classification engine

Classification label: mal64.troj.linELF@0/0@2/0

Source: /tmp/arm6.elf (PID: 5819)

Queries kernel information via 'uname':

Jump to behavior

Source: arm6.elf, 5819.1.00007ffc467a2000.00007ffc467c3000.rw-.sdmp	Binary or memory string: 9x86_64/usr/bin/qemu-arm/tmp/arm6.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/arm6.elf
Source: arm6.elf, 5819.1.000056326e6fe000.000056326e82c000.rw-.sdmp	Binary or memory string: Sqn2VPUqn2VPRqn2V!/etc/qemu-binfmt/arm
Source: arm6.elf, 5819.1.000056326e6fe000.000056326e82c000.rw-.sdmp	Binary or memory string: /etc/qemu-binfmt/arm
Source: arm6.elf, 5819.1.00007ffc467a2000.00007ffc467c3000.rw-.sdmp	Binary or memory string: /usr/bin/qemu-arm
Source: arm6.elf, 5819.1.00007ffc467a2000.00007ffc467c3000.rw-.sdmp	Binary or memory string: qemu: uncaught target signal 11 (Segmentation fault) - core dumped

Stealing of Sensitive Information

Yara detected Mirai

Source: Yara match	File source: arm6.elf, type: SAMPLE
Source: Yara match	File source: 5819.1.00007fed0c017000.00007fed0c037000.r-x.sdmp, type: MEMORY

Remote Access Functionality

Yara detected Mirai

Source: Yara match	File source: arm6.elf, type: SAMPLE
Source: Yara match	File source: 5819.1.00007fed0c017000.00007fed0c037000.r-x.sdmp, type: MEMORY

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
arm6.elf	48%	Virustotal		Browse
arm6.elf	42%	ReversingLabs	Linux.Backdoor.Mirai
arm6.elf	100%	Avira	EXP/ELF.Mirai.W

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		high

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	i586.elf	Get hash	malicious	Mirai	Browse	162.213.35.25
	2.elf	Get hash	malicious	Unknown	Browse	162.213.35.24
	armv6l.elf	Get hash	malicious	Mirai	Browse	162.213.35.25
	armv4l.elf	Get hash	malicious	Mirai	Browse	162.213.35.24
	mipsel.elf	Get hash	malicious	Mirai	Browse	162.213.35.24
	sh4.elf	Get hash	malicious	Gafgyt, Mirai	Browse	162.213.35.24
	i686.elf	Get hash	malicious	Mirai	Browse	162.213.35.24
	boatnet.arm7.elf	Get hash	malicious	Mirai	Browse	162.213.35.24
	X86_64.elf	Get hash	malicious	Unknown	Browse	162.213.35.25
	4.elf	Get hash	malicious	Unknown	Browse	162.213.35.24

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, EABI4 version 1 (SYSV), statically linked, stripped
Entropy (8bit):	5.525518230099726
TrID:	ELF Executable and Linkable format (generic) (4004/1) 100.00%
File name:	arm6.elf
File size:	149'968 bytes
MD5:	97ee7cf90d49a55b4dce1d06269ab602
SHA1:	c39a8cb137c25611282e711069f200c4d2cd8db9
SHA256:	b38f0910b9beb03f34df6dededf8b41cd180858ea977e31045046142df3a625f
SHA512:	4c4db6aceaa5cf4b490a8bcb27bb6577402d196c2fbbced1c3c9af9ff40f3118f52cd862565c08ad4761d8fc2088c529ff8bb3594c3b6eade538d4c523bf6589
SSDEEP:	3072:euSdDYLUZczXCIQGbMsCGwS47adNJbzan5:euSSLUOXrrbMuwS47a1c
TLSH:	3DE30A46F8819B15D5D112BEFE1E124E33232B7CE2DE72029D246B247B8A97F0E3B515
File Content Preview:	.ELF..............(.....T...4....G......4. ...(.....................P...P...........................HG..............Q.td..................................-...L..................@-.,@...0....S..... 0....S.........../..0...0...@..../.H.............-.@0....S

Static ELF Info

ELF header
Class:	ELF32
Data:	2's complement, little endian
Version:	1 (current)
Machine:	ARM
Version Number:	0x1
Type:	EXEC (Executable file)
OS/ABI:	UNIX - System V
ABI Version:	0
Entry Point Address:	0x8154
Flags:	0x4000002
ELF Header Size:	52
Program Header Offset:	52
Program Header Size:	32
Number of Program Headers:	3
Section Header Offset:	149448
Section Header Size:	40
Number of Section Headers:	13
Header String Table Index:	12

Sections

Name	Type	Address	Offset	Size	EntSize	Flags	Flags Description	Align
	NULL	0x0	0x0	0x0	0x0	0x0		0
.init	PROGBITS	0x8094	0x94	0x10	0x0	0x6	AX	4
.text	PROGBITS	0x80b0	0xb0	0x1d3b0	0x0	0x6	AX	16
.fini	PROGBITS	0x25460	0x1d460	0x10	0x0	0x6	AX	4
.rodata	PROGBITS	0x25470	0x1d470	0x1ee0	0x0	0x2	A	8
.init_array	INIT_ARRAY	0x28004	0x20008	0x8	0x0	0x3	WA	4
.fini_array	FINI_ARRAY	0x2800c	0x20010	0x4	0x0	0x3	WA	4
.data.rel.ro	PROGBITS	0x28014	0x20018	0x78	0x0	0x3	WA	4
.got	PROGBITS	0x2808c	0x20090	0x11c	0x4	0x3	WA	4
.data	PROGBITS	0x281c0	0x201c4	0x4588	0x0	0x3	WA	32
.bss	NOBITS	0x2c748	0x2474c	0x485c	0x0	0x3	WA	8
.ARM.attributes	ARM_ATTRIBUTES	0x0	0x2474c	0x10	0x0	0x0		1
.shstrtab	STRTAB	0x0	0x2475c	0x6a	0x0	0x0		1

Program Segments

Type	Offset	Virtual Address	Physical Address	File Size	Memory Size	Entropy	Flags	Flags Description	Align	Section Mappings
LOAD	0x0	0x8000	0x8000	0x1f350	0x1f350	6.0650	0x5	R E	0x8000	.init .text .fini .rodata
LOAD	0x20004	0x28004	0x28000	0x4748	0x10fa0	0.3671	0x6	RW	0x8000	.init_array .fini_array .data.rel.ro .got .data .bss
GNU_STACK	0x0	0x0	0x0	0x0	0x0	0.0000	0x7	RWE	0x4

Network Behavior

Network Port Distribution

TCP Packets

Timestamp	Source Port	Dest Port	Source IP	Dest IP
Jan 3, 2025 08:19:23.764516115 CET	55758	53	192.168.2.15	8.8.8.8
Jan 3, 2025 08:19:23.769530058 CET	53	55758	8.8.8.8	192.168.2.15
Jan 3, 2025 08:19:23.769594908 CET	55758	53	192.168.2.15	8.8.8.8
Jan 3, 2025 08:19:23.769608021 CET	55758	53	192.168.2.15	8.8.8.8
Jan 3, 2025 08:19:23.769628048 CET	55758	53	192.168.2.15	8.8.8.8
Jan 3, 2025 08:19:23.774441957 CET	53	55758	8.8.8.8	192.168.2.15
Jan 3, 2025 08:19:23.774492025 CET	53	55758	8.8.8.8	192.168.2.15
Jan 3, 2025 08:19:24.231853008 CET	53	55758	8.8.8.8	192.168.2.15
Jan 3, 2025 08:19:24.231923103 CET	55758	53	192.168.2.15	8.8.8.8
Jan 3, 2025 08:19:24.364187956 CET	53	55758	8.8.8.8	192.168.2.15
Jan 3, 2025 08:19:24.364253044 CET	55758	53	192.168.2.15	8.8.8.8
Jan 3, 2025 08:19:26.231952906 CET	53	55758	8.8.8.8	192.168.2.15
Jan 3, 2025 08:19:26.232423067 CET	55758	53	192.168.2.15	8.8.8.8
Jan 3, 2025 08:19:26.237286091 CET	53	55758	8.8.8.8	192.168.2.15

DNS Queries

Timestamp	Source IP	Dest IP	Trans ID	OP Code	Name	Type	Class	DNS over HTTPS
Jan 3, 2025 08:19:23.769608021 CET	192.168.2.15	8.8.8.8	0xa276	Standard query (0)	daisy.ubuntu.com	A (IP address)	IN (0x0001)	false
Jan 3, 2025 08:19:23.769628048 CET	192.168.2.15	8.8.8.8	0xbda8	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
Jan 3, 2025 08:19:24.231853008 CET	8.8.8.8	192.168.2.15	0xa276	No error (0)	daisy.ubuntu.com		162.213.35.25	A (IP address)	IN (0x0001)	false
Jan 3, 2025 08:19:24.231853008 CET	8.8.8.8	192.168.2.15	0xa276	No error (0)	daisy.ubuntu.com		162.213.35.24	A (IP address)	IN (0x0001)	false

System Behavior

Analysis Process: arm6.elf PID: 5819, Parent PID: 5743

General

Start time (UTC):	07:19:21
Start date (UTC):	03/01/2025
Path:	/tmp/arm6.elf
Arguments:	/tmp/arm6.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 arm6.elf

Overview

General Information

Detection

Signatures

Classification

General Information

Runtime Messages

Process Tree

Malware Threat Intel

Yara Signatures

Initial Sample

Memory Dumps

Suricata Signatures

Joe Sandbox Signatures

AV Detection

Networking

System Summary

Malware Analysis System Evasion

Stealing of Sensitive Information

Remote Access Functionality

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

Static ELF Info

ELF header

Sections

Program Segments

Network Behavior

Network Port Distribution

TCP Packets

DNS Queries

DNS Answers

System Behavior

Analysis Process: arm6.elf PID: 5819, Parent PID: 5743

General

Chronological Activities

Linux Analysis Report
arm6.elf