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Linux Analysis Report
dlr.x86.elf

Overview

General Information

Sample name:	dlr.x86.elf
Analysis ID:	1663479
MD5:	6f421c050ecf9a0dfeb47449457bf5fc
SHA1:	da63c2d8f5776a9be3188ce30cd0fb1c0ea4a401
SHA256:	24d43c582bf9192d13c1e9f0b0a1d2f2bbbdd9e16c9d1e6cc217ae1e92f64d55
Tags:	elfuser-abuse_ch
Infos:

Detection

Score:	60
Range:	0 - 100

Signatures

Malicious sample detected (through community Yara rule)

Multi AV Scanner detection for submitted file

Connects to many ports of the same IP (likely port scanning)

Detected TCP or UDP traffic on non-standard ports

Sample has stripped symbol table

Tries to connect to HTTP servers, but all servers are down (expired dropper behavior)

Yara signature match

Classification

General Information

Joe Sandbox version:	42.0.0 Malachite
Analysis ID:	1663479
Start date and time:	2025-04-11 21:17:58 +02:00
Joe Sandbox product:	CloudBasic
Overall analysis duration:	0h 6m 55s
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:	dlr.x86.elf
Detection:	MAL
Classification:	mal60.troj.linELF@0/0@2/0

Runtime Messages

Command:	/tmp/dlr.x86.elf
PID:	5516
Exit Code:
Exit Code Info:
Killed:	True
Standard Output:
Standard Error:

Process Tree

system is lnxubuntu20

dlr.x86.elf (PID: 5516, Parent: 5434, MD5: 6f421c050ecf9a0dfeb47449457bf5fc) Arguments: /tmp/dlr.x86.elf

cleanup

Yara Signatures

Initial Sample

Source	Rule	Description	Author	Strings
dlr.x86.elf	Mirai_1_May17	Detects Mirai Malware	Florian Roth	0x3a3:$s1: GET /bins/mirai.x86 HTTP/1.0

Memory Dumps

Source	Rule	Description	Author	Strings
5516.1.0000000008049000.000000000804a000.rw-.sdmp	Mirai_1_May17	Detects Mirai Malware	Florian Roth	0x3a3:$s1: GET /bins/mirai.x86 HTTP/1.0
5516.1.0000000008048000.0000000008049000.r-x.sdmp	Mirai_1_May17	Detects Mirai Malware	Florian Roth	0x3a3:$s1: GET /bins/mirai.x86 HTTP/1.0

Suricata Signatures

⊘No Suricata rule has matched

Joe Sandbox Signatures

Click to jump to signature section

Show All Signature Results

AV Detection

Multi AV Scanner detection for submitted file

Source: dlr.x86.elf	Virustotal: Detection: 28%			Perma Link
Source: dlr.x86.elf	ReversingLabs: Detection: 41%

Networking

Connects to many ports of the same IP (likely port scanning)

Source: global traffic

TCP traffic: 154.81.179.195 ports 0,1,2,4,8,48102

Source: global traffic

TCP traffic: 192.168.2.14:50946 -> 154.81.179.195:48102

Source: global traffic

TCP traffic: 192.168.2.14:46540 -> 185.125.190.26:443

Source: unknown	TCP traffic detected without corresponding DNS query: 154.81.179.195
Source: unknown	TCP traffic detected without corresponding DNS query: 154.81.179.195
Source: unknown	TCP traffic detected without corresponding DNS query: 154.81.179.195
Source: unknown	TCP traffic detected without corresponding DNS query: 185.125.190.26
Source: unknown	TCP traffic detected without corresponding DNS query: 154.81.179.195
Source: unknown	TCP traffic detected without corresponding DNS query: 154.81.179.195
Source: unknown	TCP traffic detected without corresponding DNS query: 154.81.179.195
Source: unknown	TCP traffic detected without corresponding DNS query: 185.125.190.26
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: unknown

Network traffic detected: HTTP traffic on port 46540 -> 443

System Summary

Malicious sample detected (through community Yara rule)

Source: dlr.x86.elf, type: SAMPLE	Matched rule: Detects Mirai Malware Author: Florian Roth
Source: 5516.1.0000000008049000.000000000804a000.rw-.sdmp, type: MEMORY	Matched rule: Detects Mirai Malware Author: Florian Roth
Source: 5516.1.0000000008048000.0000000008049000.r-x.sdmp, type: MEMORY	Matched rule: Detects Mirai Malware Author: Florian Roth

Source: ELF static info symbol of initial sample

.symtab present: no

Source: dlr.x86.elf, type: SAMPLE	Matched rule: Mirai_1_May17 date = 2017-05-12, hash3 = a393449a5f19109160384b13d60bb40601af2ef5f08839b5223f020f1f83e990, hash2 = 9ba8def84a0bf14f682b3751b8f7a453da2cea47099734a72859028155b2d39c, author = Florian Roth, description = Detects Mirai Malware, reference = Internal Research, license = https://creativecommons.org/licenses/by-nc/4.0/, super_rule = 172d050cf0d4e4f5407469998857b51261c80209d9fa5a2f5f037f8ca14e85d2
Source: 5516.1.0000000008049000.000000000804a000.rw-.sdmp, type: MEMORY	Matched rule: Mirai_1_May17 date = 2017-05-12, hash3 = a393449a5f19109160384b13d60bb40601af2ef5f08839b5223f020f1f83e990, hash2 = 9ba8def84a0bf14f682b3751b8f7a453da2cea47099734a72859028155b2d39c, author = Florian Roth, description = Detects Mirai Malware, reference = Internal Research, license = https://creativecommons.org/licenses/by-nc/4.0/, super_rule = 172d050cf0d4e4f5407469998857b51261c80209d9fa5a2f5f037f8ca14e85d2
Source: 5516.1.0000000008048000.0000000008049000.r-x.sdmp, type: MEMORY	Matched rule: Mirai_1_May17 date = 2017-05-12, hash3 = a393449a5f19109160384b13d60bb40601af2ef5f08839b5223f020f1f83e990, hash2 = 9ba8def84a0bf14f682b3751b8f7a453da2cea47099734a72859028155b2d39c, author = Florian Roth, description = Detects Mirai Malware, reference = Internal Research, license = https://creativecommons.org/licenses/by-nc/4.0/, super_rule = 172d050cf0d4e4f5407469998857b51261c80209d9fa5a2f5f037f8ca14e85d2

Source: classification engine

Classification label: mal60.troj.linELF@0/0@2/0

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	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 Non-Standard Port	Exfiltration Over Bluetooth	Network Denial of Service
Email Addresses	DNS Server	Domain Accounts	At	Logon Script (Windows)	Logon Script (Windows)	Obfuscated Files or Information	Security Account Manager	Query Registry	SMB/Windows Admin Shares	Data from Network Shared Drive	1 Non-Application Layer Protocol	Automated Exfiltration	Data Encrypted for Impact
Employee Names	Virtual Private Server	Local Accounts	Cron	Login Hook	Login Hook	Binary Padding	NTDS	System Network Configuration Discovery	Distributed Component Object Model	Input Capture	2 Application Layer Protocol	Traffic Duplication	Data Destruction

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
dlr.x86.elf	29%	Virustotal		Browse
dlr.x86.elf	42%	ReversingLabs	Linux.Backdoor.Mirai

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. 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
185.125.190.26	unknown	United Kingdom		41231	CANONICAL-ASGB	false
154.81.179.195	unknown	Seychelles		35916	MULTA-ASN1US	true

Joe Sandbox View / Context

IPs

Match	Associated Sample Name / URL	SHA 256	Detection	Threat Name	Link	Context
185.125.190.26	mirai.mpsl.elf	Get hash	malicious	Mirai	Browse
	mirai.arm5n.elf	Get hash	malicious	Mirai	Browse
	2xvhK6n0L5YrHJ4.ppc.elf	Get hash	malicious	Mirai	Browse
	na.elf	Get hash	malicious	Prometei	Browse
	na.elf	Get hash	malicious	Prometei	Browse
	t7h65hoHB2.elf	Get hash	malicious	Unknown	Browse
	vision.m68k.elf	Get hash	malicious	Mirai	Browse
	vision.mpsl.elf	Get hash	malicious	Mirai	Browse
	mips.elf	Get hash	malicious	Aquabot	Browse
	sshd.elf	Get hash	malicious	Unknown	Browse
154.81.179.195	mirai.mpsl.elf	Get hash	malicious	Mirai	Browse	/bins/mirai.mpsl
	mirai.mips.elf	Get hash	malicious	Mirai	Browse	/bins/mirai.mips
	mirai.arm7.elf	Get hash	malicious	Mirai	Browse	/bins/mirai.arm7

Domains

Match	Associated Sample Name / URL	SHA 256	Detection	Threat Name	Link	Context
daisy.ubuntu.com	dlr.ppc.elf	Get hash	malicious	Unknown	Browse	162.213.35.24
	dlr.arm.elf	Get hash	malicious	Unknown	Browse	162.213.35.25
	mirai.m68k.elf	Get hash	malicious	Mirai	Browse	162.213.35.24
	mirai.arm5n.elf	Get hash	malicious	Mirai	Browse	162.213.35.25
	mirai.spc.elf	Get hash	malicious	Mirai	Browse	162.213.35.25
	dlr.m68k.elf	Get hash	malicious	Unknown	Browse	162.213.35.25
	mirai.mips.elf	Get hash	malicious	Mirai	Browse	162.213.35.24
	dlr.mpsl.elf	Get hash	malicious	Unknown	Browse	162.213.35.25
	mirai.m68k.elf	Get hash	malicious	Mirai	Browse	162.213.35.25
	mirai.arm.elf	Get hash	malicious	Mirai	Browse	162.213.35.24

ASNs

Match	Associated Sample Name / URL	SHA 256	Detection	Threat Name	Link	Context
CANONICAL-ASGB	mirai.mpsl.elf	Get hash	malicious	Mirai	Browse	185.125.190.26
	dlr.spc.elf	Get hash	malicious	Unknown	Browse	91.189.91.42
	dlr.arm7.elf	Get hash	malicious	Unknown	Browse	91.189.91.42
	mirai.arm5n.elf	Get hash	malicious	Mirai	Browse	185.125.190.26
	mirai.arm7.elf	Get hash	malicious	Mirai	Browse	91.189.91.42
	mirai.mips.elf	Get hash	malicious	Mirai	Browse	91.189.91.42
	mirai.sh4.elf	Get hash	malicious	Mirai	Browse	91.189.91.42
	dlr.sh4.elf	Get hash	malicious	Unknown	Browse	91.189.91.42
	na.elf	Get hash	malicious	Prometei	Browse	91.189.91.42
	na.elf	Get hash	malicious	Prometei	Browse	91.189.91.42
MULTA-ASN1US	mirai.mpsl.elf	Get hash	malicious	Mirai	Browse	154.81.179.195
	dlr.arm7.elf	Get hash	malicious	Unknown	Browse	154.81.179.195
	dlr.mpsl.elf	Get hash	malicious	Unknown	Browse	154.81.179.195
	mirai.mips.elf	Get hash	malicious	Mirai	Browse	154.81.179.195
	mirai.arm7.elf	Get hash	malicious	Mirai	Browse	154.81.179.195
	dlr.mips.elf	Get hash	malicious	Unknown	Browse	154.81.179.195
	nabsh4.elf	Get hash	malicious	Unknown	Browse	156.233.244.174
	m68k.elf	Get hash	malicious	Mirai	Browse	173.82.15.74
	armv6l.elf	Get hash	malicious	Gafgyt, Mirai	Browse	156.233.174.198
	mipsel.elf	Get hash	malicious	Gafgyt, Mirai	Browse	108.166.255.126

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, Intel 80386, version 1 (SYSV), statically linked, stripped
Entropy (8bit):	5.536042771060108
TrID:	ELF Executable and Linkable format (Linux) (4029/14) 50.16% ELF Executable and Linkable format (generic) (4004/1) 49.84%
File name:	dlr.x86.elf
File size:	1'216 bytes
MD5:	6f421c050ecf9a0dfeb47449457bf5fc
SHA1:	da63c2d8f5776a9be3188ce30cd0fb1c0ea4a401
SHA256:	24d43c582bf9192d13c1e9f0b0a1d2f2bbbdd9e16c9d1e6cc217ae1e92f64d55
SHA512:	3ff47adabafc00f5b56bce42efdf4e9d642d842a90df32903fd566097e1fb715272536a9d17dfbad98d4ab5ce2920098df4fca99d4b760577ca3d63df0574ba9
SSDEEP:	24:FlSMnq5ZdWomceZGQleZ3eLthD0ZayG9Y9OjUruQmLiTVTNftj:fShZM7coGQlo3eLt50ZpUYsjIHmWZTNJ
TLSH:	0221EF52E1D9EC32CB2700FFA285AF4B23948E957517FF07DAA14502DC29AD5D523274
File Content Preview:	.ELF....................$...4...........4. ...(.....................................................................Q.td............................U....U...E...M...........E....].........................................U......u.j..D........U......u.j../.

Static ELF Info

ELF header
Class:	ELF32
Data:	2's complement, little endian
Version:	1 (current)
Machine:	Intel 80386
Version Number:	0x1
Type:	EXEC (Executable file)
OS/ABI:	UNIX - System V
ABI Version:	0
Entry Point Address:	0x8048324
Flags:	0x0
ELF Header Size:	52
Program Header Offset:	52
Program Header Size:	32
Number of Program Headers:	3
Section Header Offset:	1016
Section Header Size:	40
Number of Section Headers:	5
Header String Table Index:	4

Sections

Name	Type	Address	Offset	Size	EntSize	Flags	Flags Description	Align
	NULL	0x0	0x0	0x0	0x0	0x0		0
.text	PROGBITS	0x8048094	0x94	0x2e9	0x0	0x6	AX	4
.rodata	PROGBITS	0x804837d	0x37d	0x5a	0x1	0x32	AMS	1
.bss	NOBITS	0x80493d8	0x3d8	0x4	0x0	0x3	WA	4
.shstrtab	STRTAB	0x0	0x3d8	0x1e	0x0	0x0		1

Program Segments

Type	Offset	Virtual Address	Physical Address	File Size	Memory Size	Entropy	Flags	Flags Description	Align	Section Mappings
LOAD	0x0	0x8048000	0x8048000	0x3d7	0x3d7	5.9695	0x5	R E	0x1000	.text .rodata
LOAD	0x3d8	0x80493d8	0x80493d8	0x0	0x4	0.0000	0x6	RW	0x1000	.bss
GNU_STACK	0x0	0x0	0x0	0x0	0x0	0.0000	0x6	RW	0x4

Network Behavior

Network Port Distribution

TCP Packets

Timestamp	Source Port	Dest Port	Source IP	Dest IP
Apr 11, 2025 21:18:57.450253963 CEST	50946	48102	192.168.2.14	154.81.179.195
Apr 11, 2025 21:18:58.457806110 CEST	50946	48102	192.168.2.14	154.81.179.195
Apr 11, 2025 21:19:00.473828077 CEST	50946	48102	192.168.2.14	154.81.179.195
Apr 11, 2025 21:19:03.705851078 CEST	46540	443	192.168.2.14	185.125.190.26
Apr 11, 2025 21:19:04.729557037 CEST	50946	48102	192.168.2.14	154.81.179.195
Apr 11, 2025 21:19:12.921298027 CEST	50946	48102	192.168.2.14	154.81.179.195
Apr 11, 2025 21:19:29.048711061 CEST	50946	48102	192.168.2.14	154.81.179.195
Apr 11, 2025 21:19:33.656310081 CEST	46540	443	192.168.2.14	185.125.190.26

UDP Packets

Timestamp	Source Port	Dest Port	Source IP	Dest IP
Apr 11, 2025 21:21:39.108429909 CEST	56043	53	192.168.2.14	1.1.1.1
Apr 11, 2025 21:21:39.108429909 CEST	56520	53	192.168.2.14	1.1.1.1
Apr 11, 2025 21:21:39.215478897 CEST	53	56520	1.1.1.1	192.168.2.14
Apr 11, 2025 21:21:39.242847919 CEST	53	56043	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
Apr 11, 2025 21:21:39.108429909 CEST	192.168.2.14	1.1.1.1	0xa753	Standard query (0)	daisy.ubuntu.com	A (IP address)	IN (0x0001)	false
Apr 11, 2025 21:21:39.108429909 CEST	192.168.2.14	1.1.1.1	0x8e2e	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
Apr 11, 2025 21:21:39.242847919 CEST	1.1.1.1	192.168.2.14	0xa753	No error (0)	daisy.ubuntu.com		162.213.35.25	A (IP address)	IN (0x0001)	false
Apr 11, 2025 21:21:39.242847919 CEST	1.1.1.1	192.168.2.14	0xa753	No error (0)	daisy.ubuntu.com		162.213.35.24	A (IP address)	IN (0x0001)	false

System Behavior

Analysis Process: dlr.x86.elf PID: 5516, Parent PID: 5434

General

Start time (UTC):	19:18:56
Start date (UTC):	11/04/2025
Path:	/tmp/dlr.x86.elf
Arguments:	/tmp/dlr.x86.elf
File size:	1216 bytes
MD5 hash:	6f421c050ecf9a0dfeb47449457bf5fc

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 a protocol and port pairing that are typically not associated. For example, HTTPS over port 8088or port 587as opposed to the traditional port 443. Adversaries may make changes to the standard port used by a protocol to bypass filtering or muddle analysis/parsing of network data.
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

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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Warning!

Linux Analysis Report dlr.x86.elf

Overview

General Information

Detection

Signatures

Classification

General Information

Runtime Messages

Process Tree

Yara Signatures

Initial Sample

Memory Dumps

Suricata Signatures

Joe Sandbox Signatures

AV Detection

Networking

System Summary

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

Public 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

UDP Packets

DNS Queries

DNS Answers

System Behavior

Analysis Process: dlr.x86.elf PID: 5516, Parent PID: 5434

General

Chronological Activities

Linux Analysis Report
dlr.x86.elf