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Linux Analysis Report
arc.elf

Overview

General Information

Sample name:	arc.elf
Analysis ID:	1646530
MD5:	7e5b86d09c7cb30e860bb5bf55745521
SHA1:	9ab3ea7d8512dc8e4c3db6492ef78c89e771fda5
SHA256:	db901b478fdec9384af18b8e869c03616cc64ee251aeb8bebac50c1d20e309ee
Tags:	elfuser-abuse_ch
Infos:

Detection

Mirai

Score:	56
Range:	0 - 100

Signatures

Multi AV Scanner detection for submitted file

Yara detected Mirai

Executes the "rm" command used to delete files or directories

Classification

General Information

Joe Sandbox version:	42.0.0 Malachite
Analysis ID:	1646530
Start date and time:	2025-03-24 05:07:51 +01:00
Joe Sandbox product:	CloudBasic
Overall analysis duration:	0h 4m 32s
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:	arc.elf
Detection:	MAL
Classification:	mal56.troj.linELF@0/0@0/0

Runtime Messages

Command:	/tmp/arc.elf
PID:	5547
Exit Code:	255
Exit Code Info:
Killed:	False
Standard Output:
Standard Error:

Process Tree

system is lnxubuntu20

dash New Fork (PID: 5612, Parent: 3671)

rm (PID: 5612, Parent: 3671, MD5: aa2b5496fdbfd88e38791ab81f90b95b) Arguments: rm -f /tmp/tmp.Apoo2bHQ80 /tmp/tmp.U1T417YSne /tmp/tmp.30oaB7M8FX

dash New Fork (PID: 5613, Parent: 3671)

rm (PID: 5613, Parent: 3671, MD5: aa2b5496fdbfd88e38791ab81f90b95b) Arguments: rm -f /tmp/tmp.Apoo2bHQ80 /tmp/tmp.U1T417YSne /tmp/tmp.30oaB7M8FX

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
arc.elf	JoeSecurity_Mirai_8	Yara detected Mirai	Joe Security

Suricata Signatures

⊘No Suricata rule has matched

Joe Sandbox Signatures

• AV Detection
• Networking
• System Summary
• Persistence and Installation Behavior
• Stealing of Sensitive Information
• Remote Access Functionality

Click to jump to signature section

Show All Signature Results

AV Detection

Multi AV Scanner detection for submitted file

Source: arc.elf

ReversingLabs: Detection: 22%

Source: unknown	TCP traffic detected without corresponding DNS query: 34.254.182.186
Source: unknown	TCP traffic detected without corresponding DNS query: 54.171.230.55
Source: unknown	TCP traffic detected without corresponding DNS query: 54.171.230.55
Source: unknown	TCP traffic detected without corresponding DNS query: 54.171.230.55
Source: unknown	TCP traffic detected without corresponding DNS query: 54.171.230.55

Source: unknown	Network traffic detected: HTTP traffic on port 443 -> 60072
Source: unknown	Network traffic detected: HTTP traffic on port 60072 -> 443
Source: unknown	Network traffic detected: HTTP traffic on port 44524 -> 443

Source: classification engine

Classification label: mal56.troj.linELF@0/0@0/0

Source: /usr/bin/dash (PID: 5612)	Rm executable: /usr/bin/rm -> rm -f /tmp/tmp.Apoo2bHQ80 /tmp/tmp.U1T417YSne /tmp/tmp.30oaB7M8FX			Jump to behavior
Source: /usr/bin/dash (PID: 5613)	Rm executable: /usr/bin/rm -> rm -f /tmp/tmp.Apoo2bHQ80 /tmp/tmp.U1T417YSne /tmp/tmp.30oaB7M8FX			Jump to behavior

Stealing of Sensitive Information

Yara detected Mirai

Source: Yara match

File source: arc.elf, type: SAMPLE

Remote Access Functionality

Yara detected Mirai

Source: Yara match

File source: arc.elf, type: SAMPLE

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	1 File Deletion	OS Credential Dumping	System Service Discovery	Remote Services	Data from Local System	1 Encrypted Channel	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

Screenshots

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Thumbnails

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

Antivirus, Machine Learning and Genetic Malware Detection

Initial Sample

Source	Detection	Scanner	Label	Link
arc.elf	22%	ReversingLabs	Linux.Backdoor.Mirai

Dropped Files

⊘No Antivirus matches

Domains

⊘No Antivirus matches

URLs

⊘No Antivirus matches

Domains and IPs

Download Network PCAP: filtered – full

Contacted Domains

⊘No contacted domains info

World Map of Contacted IPs

No. of IPs < 25%
25% < No. of IPs < 50%
50% < No. of IPs < 75%
75% < No. of IPs

Public IPs

IP	Domain	Country	Flag	ASN	ASN Name	Malicious
54.171.230.55	unknown	United States		16509	AMAZON-02US	false
34.254.182.186	unknown	United States		16509	AMAZON-02US	false

Joe Sandbox View / Context

IPs

Match	Associated Sample Name / URL	SHA 256	Detection	Threat Name	Link
54.171.230.55	morte.mips.elf	Get hash	malicious	Gafgyt, Okiru	Browse
	aarch64.elf	Get hash	malicious	Mirai	Browse
	na.elf	Get hash	malicious	Prometei	Browse
	arm6.elf	Get hash	malicious	Mirai	Browse
	na.elf	Get hash	malicious	Prometei	Browse
	gigab.arm5.elf	Get hash	malicious	Unknown	Browse
	na.elf	Get hash	malicious	Prometei	Browse
	updated.elf	Get hash	malicious	Unknown	Browse
	spc.elf	Get hash	malicious	Mirai	Browse
	na.elf	Get hash	malicious	Prometei	Browse
34.254.182.186	na.elf	Get hash	malicious	Prometei	Browse
	yakuza.sh4.elf	Get hash	malicious	Gafgyt, Mirai	Browse
	na.elf	Get hash	malicious	Prometei	Browse
	arm6.elf	Get hash	malicious	Mirai	Browse
	x.rar.elf	Get hash	malicious	Xmrig	Browse
	na.elf	Get hash	malicious	Prometei	Browse
	main_x86_64.elf	Get hash	malicious	Unknown	Browse
	na.elf	Get hash	malicious	Prometei	Browse
	miner.elf	Get hash	malicious	Unknown	Browse
	na.elf	Get hash	malicious	Prometei	Browse

Domains

⊘No context

ASNs

Match	Associated Sample Name / URL	SHA 256	Detection	Threat Name	Link	Context
AMAZON-02US	#U0440#U043e#U0431#U043b#U043e#U043a#U0441.exe	Get hash	malicious	Njrat	Browse	18.197.239.5
	na.elf	Get hash	malicious	Prometei	Browse	52.43.119.120
	gigab.x86.elf	Get hash	malicious	Unknown	Browse	34.249.145.219
	morte.mips.elf	Get hash	malicious	Gafgyt, Okiru	Browse	54.171.230.55
	arm7.elf	Get hash	malicious	Unknown	Browse	34.249.145.219
	SecuriteInfo.com.Win64.CrypterX-gen.5834.27621.exe	Get hash	malicious	Vidar	Browse	108.138.128.112
	aarch64.elf	Get hash	malicious	Mirai	Browse	34.249.145.219
	resgod.arm5.elf	Get hash	malicious	Mirai	Browse	54.77.209.255
	na.elf	Get hash	malicious	Prometei	Browse	52.43.119.120
	na.elf	Get hash	malicious	Prometei	Browse	54.247.62.1
AMAZON-02US	#U0440#U043e#U0431#U043b#U043e#U043a#U0441.exe	Get hash	malicious	Njrat	Browse	18.197.239.5
	na.elf	Get hash	malicious	Prometei	Browse	52.43.119.120
	gigab.x86.elf	Get hash	malicious	Unknown	Browse	34.249.145.219
	morte.mips.elf	Get hash	malicious	Gafgyt, Okiru	Browse	54.171.230.55
	arm7.elf	Get hash	malicious	Unknown	Browse	34.249.145.219
	SecuriteInfo.com.Win64.CrypterX-gen.5834.27621.exe	Get hash	malicious	Vidar	Browse	108.138.128.112
	aarch64.elf	Get hash	malicious	Mirai	Browse	34.249.145.219
	resgod.arm5.elf	Get hash	malicious	Mirai	Browse	54.77.209.255
	na.elf	Get hash	malicious	Prometei	Browse	52.43.119.120
	na.elf	Get hash	malicious	Prometei	Browse	54.247.62.1

JA3 Fingerprints

⊘No context

Dropped Files

⊘No context

Created / dropped Files

⊘No created / dropped files found

Static File Info

General

File type:
Entropy (8bit):	6.454116349154812
TrID:	ELF Executable and Linkable format (generic) (4004/1) 100.00%
File name:	arc.elf
File size:	116'116 bytes
MD5:	7e5b86d09c7cb30e860bb5bf55745521
SHA1:	9ab3ea7d8512dc8e4c3db6492ef78c89e771fda5
SHA256:	db901b478fdec9384af18b8e869c03616cc64ee251aeb8bebac50c1d20e309ee
SHA512:	e5bef19a5dd94d8b83cf8df2cf2d7fc1714ff0970151cdc322dd46fb2452a5ae5075f0dfeabf4f717025fabffc401db2637f4a603fac8091b3221976ff13bdd3
SSDEEP:	3072:+i7m/M3G6twoki710IQewITWDwnT3vEgQnZq:zb7WaaD68q
TLSH:	FFB3AEDBB34B5460C82247F90BD78B9E3E6332519E27C8E36C0E557A34791DB190A7D2
File Content Preview:	.ELF..............].........4...d.......4. ...(.....................L...L........ .......................~....... ..................................................................Q.td.......................................................................

Network Behavior

Download Network PCAP: filtered – full

TCP Packets

Timestamp	Source Port	Dest Port	Source IP	Dest IP
Mar 24, 2025 05:08:43.839741945 CET	44524	443	192.168.2.15	34.254.182.186
Mar 24, 2025 05:09:12.300236940 CET	60072	443	192.168.2.15	54.171.230.55
Mar 24, 2025 05:09:12.300312996 CET	443	60072	54.171.230.55	192.168.2.15
Mar 24, 2025 05:09:12.300388098 CET	60072	443	192.168.2.15	54.171.230.55
Mar 24, 2025 05:09:12.301611900 CET	60072	443	192.168.2.15	54.171.230.55
Mar 24, 2025 05:09:12.301629066 CET	443	60072	54.171.230.55	192.168.2.15
Mar 24, 2025 05:10:12.299199104 CET	60072	443	192.168.2.15	54.171.230.55
Mar 24, 2025 05:10:12.344326019 CET	443	60072	54.171.230.55	192.168.2.15
Mar 24, 2025 05:10:48.105597973 CET	443	60072	54.171.230.55	192.168.2.15

System Behavior

Analysis Process: dash PID: 5612, Parent PID: 3671

General

Start time (UTC):	04:10:11
Start date (UTC):	24/03/2025
Path:	/usr/bin/dash
Arguments:	-
File size:	129816 bytes
MD5 hash:	1e6b1c887c59a315edb7eb9a315fc84c

Process Activities

Process Overlayed (Exec)

Chronological Activities

Analysis Process: rm PID: 5612, Parent PID: 3671

General

Start time (UTC):	04:10:11
Start date (UTC):	24/03/2025
Path:	/usr/bin/rm
Arguments:	rm -f /tmp/tmp.Apoo2bHQ80 /tmp/tmp.U1T417YSne /tmp/tmp.30oaB7M8FX
File size:	72056 bytes
MD5 hash:	aa2b5496fdbfd88e38791ab81f90b95b

File Activities

File Opened

File Deleted

File Read

Chronological Activities

Analysis Process: dash PID: 5613, Parent PID: 3671

General

Start time (UTC):	04:10:11
Start date (UTC):	24/03/2025
Path:	/usr/bin/dash
Arguments:	-
File size:	129816 bytes
MD5 hash:	1e6b1c887c59a315edb7eb9a315fc84c

Process Activities

Process Overlayed (Exec)

Chronological Activities

Analysis Process: rm PID: 5613, Parent PID: 3671

General

Start time (UTC):	04:10:11
Start date (UTC):	24/03/2025
Path:	/usr/bin/rm
Arguments:	rm -f /tmp/tmp.Apoo2bHQ80 /tmp/tmp.U1T417YSne /tmp/tmp.30oaB7M8FX
File size:	72056 bytes
MD5 hash:	aa2b5496fdbfd88e38791ab81f90b95b

Description:	Adversaries may delete files left behind by the actions of their intrusion activity. Malware, tools, or other non-native files dropped or created on a system by an adversary (ex: Ingress Tool Transfer ) may leave traces to indicate to what was done within a network and how. Removal of these files can occur during an intrusion, or as part of a post-intrusion process to minimize the adversary's footprint.
Tactics:	Defense Evasion
Data Sources:	Command: Command Execution, File: File Deletion
Platforms:	Linux, macOS, Windows
Url:	Open detailed description by Mitre

Description:	Adversaries may employ a known encryption algorithm to conceal command and control traffic rather than relying on any inherent protections provided by a communication protocol. Despite the use of a secure algorithm, these implementations may be vulnerable to reverse engineering if secret keys are encoded and/or generated within malware samples/configuration files.
Tactics:	Command and Control
Data Sources:	Network Traffic: Network Traffic Content
Platforms:	Linux, macOS, 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

Loading Joe Sandbox Report ...

Warning!

Linux Analysis Report arc.elf

Overview

General Information

Detection

Signatures

Classification

General Information

Runtime Messages

Process Tree

Malware Threat Intel

Yara Signatures

Initial Sample

Suricata Signatures

Joe Sandbox Signatures

AV Detection

Networking

System Summary

Persistence and Installation Behavior

Stealing of Sensitive Information

Remote Access Functionality

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

World Map of Contacted IPs

Public IPs

Joe Sandbox View / Context

IPs

Domains

ASNs

JA3 Fingerprints

Dropped Files

Created / dropped Files

Static File Info

General

Network Behavior

TCP Packets

System Behavior

Analysis Process: dash PID: 5612, Parent PID: 3671

General

Process Activities

Process Overlayed (Exec)

Chronological Activities

Analysis Process: rm PID: 5612, Parent PID: 3671

General

File Activities

File Opened

File Deleted

File Read

Chronological Activities

Analysis Process: dash PID: 5613, Parent PID: 3671

General

Process Activities

Process Overlayed (Exec)

Chronological Activities

Analysis Process: rm PID: 5613, Parent PID: 3671

General

File Activities

File Opened

File Deleted

File Read

Chronological Activities

Linux Analysis Report
arc.elf