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Linux Analysis Report
dlr.arm.elf

Overview

General Information

Sample name:	dlr.arm.elf
Analysis ID:	1546731
MD5:	be7c90ac4bb096ba24326520ca92edb9
SHA1:	49c2f56cefc4ef4c64dcf2f729df877bbceef26d
SHA256:	5a9e878eedeaa18fe096470997614b3e49351d19a02de3a29748508ea256060a
Tags:	elfuser-abuse_ch
Infos:

Detection

Score:	48
Range:	0 - 100
Whitelisted:	false

Signatures

Multi AV Scanner detection for submitted file

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:	1546731
Start date and time:	2024-11-01 14:57:15 +01:00
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:	dlr.arm.elf
Detection:	MAL
Classification:	mal48.linELF@0/0@2/0

Warnings

VT rate limit hit for: dlr.arm.elf

Runtime Messages

Command:	/tmp/dlr.arm.elf
PID:	5490
Exit Code:	139
Exit Code Info:	SIGSEGV (11) Segmentation fault invalid memory reference
Killed:	False
Standard Output:
Standard Error:

Process Tree

system is lnxubuntu20

dlr.arm.elf (PID: 5490, Parent: 5416, MD5: 5ebfcae4fe2471fcc5695c2394773ff1) Arguments: /tmp/dlr.arm.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

AV Detection

Multi AV Scanner detection for submitted file

Source: dlr.arm.elf

ReversingLabs: Detection: 44%

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: ELF static info symbol of initial sample

.symtab present: no

Source: classification engine

Classification label: mal48.linELF@0/0@2/0

Source: /tmp/dlr.arm.elf (PID: 5490)

Queries kernel information via 'uname':

Jump to behavior

Source: dlr.arm.elf, 5490.1.000055ffc2f33000.000055ffc303f000.rw-.sdmp	Binary or memory string: U!/etc/qemu-binfmt/arm
Source: dlr.arm.elf, 5490.1.00007ffc3126c000.00007ffc3128d000.rw-.sdmp	Binary or memory string: x86_64/usr/bin/qemu-arm/tmp/dlr.arm.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/dlr.arm.elf
Source: dlr.arm.elf, 5490.1.000055ffc2f33000.000055ffc303f000.rw-.sdmp	Binary or memory string: Urg.qemu.gdb.arm.sys.regs">
Source: dlr.arm.elf, 5490.1.000055ffc2f33000.000055ffc303f000.rw-.sdmp	Binary or memory string: /etc/qemu-binfmt/arm
Source: dlr.arm.elf, 5490.1.00007ffc3126c000.00007ffc3128d000.rw-.sdmp	Binary or memory string: /usr/bin/qemu-arm
Source: dlr.arm.elf, 5490.1.000055ffc2f33000.000055ffc303f000.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
dlr.arm.elf	45%	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		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	harm4.elf	Get hash	malicious	Mirai	Browse	162.213.35.25
	boatnet.sh4.elf	Get hash	malicious	Mirai	Browse	162.213.35.24
	mips.elf	Get hash	malicious	Gafgyt, Mirai	Browse	162.213.35.24
	boatnet.x86.elf	Get hash	malicious	Mirai	Browse	162.213.35.24
	sparc.elf	Get hash	malicious	Gafgyt, Mirai	Browse	162.213.35.25
	boatnet.arm6.elf	Get hash	malicious	Mirai	Browse	162.213.35.24
	boatnet.ppc.elf	Get hash	malicious	Mirai	Browse	162.213.35.24
	boatnet.arm7.elf	Get hash	malicious	Mirai	Browse	162.213.35.24
	mips64.elf	Get hash	malicious	Gafgyt, 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, version 1 (ARM), statically linked, stripped
Entropy (8bit):	4.935740319081125
TrID:	ELF Executable and Linkable format (generic) (4004/1) 100.00%
File name:	dlr.arm.elf
File size:	1'160 bytes
MD5:	be7c90ac4bb096ba24326520ca92edb9
SHA1:	49c2f56cefc4ef4c64dcf2f729df877bbceef26d
SHA256:	5a9e878eedeaa18fe096470997614b3e49351d19a02de3a29748508ea256060a
SHA512:	a424f6adff466d90e775831f15047280cd4e43fe123be806118b0fe27e3f12122ebbda2f50f2aa3df3877d288e21cefcad19e69946138d23e3d7ca57a9e71290
SSDEEP:	24:Ji2tVsgP9qD0at6EoKGeyrUlFSy40VzLCkIddgHcQI5C+Nfe:JltVFFqDPtHyrkFSy4CzLT1IU+Nm
TLSH:	4221CB9667E35E17CC980237DD9F1714F322AB44859EF413E35106250C3E31A1F21199
File Content Preview:	.ELF...a..........(.........4...........4. ...(..................................................................................0...$.......,... ...<.......4.. ..."....<.......................................................0... ............-...M........

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:	ARM - ABI
ABI Version:	0
Entry Point Address:	0x831c
Flags:	0x202
ELF Header Size:	52
Program Header Offset:	52
Program Header Size:	32
Number of Program Headers:	2
Section Header Offset:	960
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	0x8074	0x74	0x2e8	0x0	0x6	AX	4
.rodata	PROGBITS	0x835c	0x35c	0x44	0x1	0x32	AMS	4
.bss	NOBITS	0x103a0	0x3a0	0x8	0x0	0x3	WA	4
.shstrtab	STRTAB	0x0	0x3a0	0x1e	0x0	0x0		1

Program Segments

Type	Offset	Virtual Address	Physical Address	File Size	Memory Size	Entropy	Flags	Flags Description	Align	Prog Interpreter	Section Mappings
LOAD	0x0	0x8000	0x8000	0x3a0	0x3a0	5.3530	0x5	R E	0x8000		.text .rodata
LOAD	0x3a0	0x103a0	0x103a0	0x0	0x8	0.0000	0x6	RW	0x8000		.bss

Network Behavior

Network Port Distribution

UDP Packets

Timestamp	Source Port	Dest Port	Source IP	Dest IP
Nov 1, 2024 14:58:03.120630980 CET	33757	53	192.168.2.14	1.1.1.1
Nov 1, 2024 14:58:03.120693922 CET	55023	53	192.168.2.14	1.1.1.1
Nov 1, 2024 14:58:03.128021002 CET	53	55023	1.1.1.1	192.168.2.14
Nov 1, 2024 14:58:03.128037930 CET	53	33757	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
Nov 1, 2024 14:58:03.120630980 CET	192.168.2.14	1.1.1.1	0x8da3	Standard query (0)	daisy.ubuntu.com	A (IP address)	IN (0x0001)	false
Nov 1, 2024 14:58:03.120693922 CET	192.168.2.14	1.1.1.1	0x2f39	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
Nov 1, 2024 14:58:03.128037930 CET	1.1.1.1	192.168.2.14	0x8da3	No error (0)	daisy.ubuntu.com		162.213.35.25	A (IP address)	IN (0x0001)	false
Nov 1, 2024 14:58:03.128037930 CET	1.1.1.1	192.168.2.14	0x8da3	No error (0)	daisy.ubuntu.com		162.213.35.24	A (IP address)	IN (0x0001)	false

System Behavior

Analysis Process: dlr.arm.elf PID: 5490, Parent PID: 5416

General

Start time (UTC):	13:58:01
Start date (UTC):	01/11/2024
Path:	/tmp/dlr.arm.elf
Arguments:	/tmp/dlr.arm.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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Warning!

Linux Analysis Report dlr.arm.elf

Overview

General Information

Detection

Signatures

Classification

General Information

Warnings

Runtime Messages

Process Tree

Yara Signatures

Suricata Signatures

Joe Sandbox Signatures

AV Detection

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

Static ELF Info

ELF header

Sections

Program Segments

Network Behavior

Network Port Distribution

UDP Packets

DNS Queries

DNS Answers

System Behavior

Analysis Process: dlr.arm.elf PID: 5490, Parent PID: 5416

General

Chronological Activities

Linux Analysis Report
dlr.arm.elf