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Linux Analysis Report
arm5.elf

Overview

General Information

Sample name:	arm5.elf
Analysis ID:	1543496
MD5:	e35f29fee681a29da563243d4fe47388
SHA1:	deae39dd2a06de25b4a81f25c1ea702d9e49e8b5
SHA256:	bc56f5751afee1fd058f639b097415362c2c37bde32e51489fc68a12ab631e93
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

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

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

Classification

General Information

Joe Sandbox version:	41.0.0 Charoite
Analysis ID:	1543496
Start date and time:	2024-10-28 02:03:07 +01:00
Joe Sandbox product:	CloudBasic
Overall analysis duration:	0h 4m 23s
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:	arm5.elf
Detection:	MAL
Classification:	mal48.linELF@0/0@0/0

Runtime Messages

Command:	/tmp/arm5.elf
PID:	6217
Exit Code:	0
Exit Code Info:
Killed:	False
Standard Output:
Standard Error:

Process Tree

system is lnxubuntu20

arm5.elf (PID: 6217, Parent: 6137, MD5: 5ebfcae4fe2471fcc5695c2394773ff1) Arguments: /tmp/arm5.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: arm5.elf

ReversingLabs: Detection: 18%

Source: global traffic	TCP traffic: 192.168.2.23:43928 -> 91.189.91.42:443
Source: global traffic	TCP traffic: 192.168.2.23:42836 -> 91.189.91.43:443
Source: global traffic	TCP traffic: 192.168.2.23:42516 -> 109.202.202.202:80

Source: unknown	TCP traffic detected without corresponding DNS query: 91.189.91.42
Source: unknown	TCP traffic detected without corresponding DNS query: 91.189.91.43
Source: unknown	TCP traffic detected without corresponding DNS query: 109.202.202.202
Source: unknown	TCP traffic detected without corresponding DNS query: 91.189.91.42
Source: unknown	TCP traffic detected without corresponding DNS query: 91.189.91.43
Source: unknown	TCP traffic detected without corresponding DNS query: 109.202.202.202
Source: unknown	TCP traffic detected without corresponding DNS query: 91.189.91.42

Source: unknown	Network traffic detected: HTTP traffic on port 43928 -> 443
Source: unknown	Network traffic detected: HTTP traffic on port 42836 -> 443

Source: ELF static info symbol of initial sample

.symtab present: no

Source: classification engine

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

Source: /tmp/arm5.elf (PID: 6217)

Queries kernel information via 'uname':

Jump to behavior

Source: arm5.elf, 6217.1.00007ffc562f6000.00007ffc56317000.rw-.sdmp	Binary or memory string: x86_64/usr/bin/qemu-arm/tmp/arm5.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/arm5.elf
Source: arm5.elf, 6217.1.00005601e8c21000.00005601e8d4f000.rw-.sdmp	Binary or memory string: /etc/qemu-binfmt/arm
Source: arm5.elf, 6217.1.00005601e8c21000.00005601e8d4f000.rw-.sdmp	Binary or memory string: V!/etc/qemu-binfmt/arm
Source: arm5.elf, 6217.1.00007ffc562f6000.00007ffc56317000.rw-.sdmp	Binary or memory string: /usr/bin/qemu-arm

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 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

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
arm5.elf	18%	ReversingLabs	Linux.Backdoor.Mirai

Dropped Files

⊘No Antivirus matches

Domains

⊘No Antivirus matches

URLs

⊘No Antivirus matches

Domains and IPs

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	ASN	ASN Name	Malicious
109.202.202.202	unknown	Switzerland	13030	INIT7CH	false
91.189.91.43	unknown	United Kingdom	41231	CANONICAL-ASGB	false
91.189.91.42	unknown	United Kingdom	41231	CANONICAL-ASGB	false

Joe Sandbox View / Context

IPs

Match	Associated Sample Name / URL	SHA 256	Detection	Threat Name	Link	Context
109.202.202.202	kpLwzBouH4.elf	Get hash	malicious	Unknown	Browse	ch.archive.ubuntu.com/ubuntu/pool/main/f/firefox/firefox_92.0%2bbuild3-0ubuntu0.20.04.1_amd64.deb
91.189.91.43	ppc.elf	Get hash	malicious	Unknown	Browse
	x86.elf	Get hash	malicious	Unknown	Browse
	na.elf	Get hash	malicious	Unknown	Browse
	linux_arm5.elf	Get hash	malicious	Chaos	Browse
	.i.elf	Get hash	malicious	Unknown	Browse
	.i.elf	Get hash	malicious	Unknown	Browse
	sshd.elf	Get hash	malicious	Unknown	Browse
	linux_mipsel_softfloat.elf	Get hash	malicious	Chaos	Browse
	linux_arm7.elf	Get hash	malicious	Chaos	Browse
	boatnet.arm5.elf	Get hash	malicious	Mirai	Browse
91.189.91.42	ppc.elf	Get hash	malicious	Unknown	Browse
	x86.elf	Get hash	malicious	Unknown	Browse
	na.elf	Get hash	malicious	Unknown	Browse
	linux_arm5.elf	Get hash	malicious	Chaos	Browse
	.i.elf	Get hash	malicious	Unknown	Browse
	.i.elf	Get hash	malicious	Unknown	Browse
	sshd.elf	Get hash	malicious	Unknown	Browse
	linux_mipsel_softfloat.elf	Get hash	malicious	Chaos	Browse
	linux_arm7.elf	Get hash	malicious	Chaos	Browse
	boatnet.arm5.elf	Get hash	malicious	Mirai	Browse

Domains

⊘No context

ASNs

Match	Associated Sample Name / URL	SHA 256	Detection	Threat Name	Link	Context
CANONICAL-ASGB	ppc.elf	Get hash	malicious	Unknown	Browse	91.189.91.42
	x86.elf	Get hash	malicious	Unknown	Browse	91.189.91.42
	na.elf	Get hash	malicious	Unknown	Browse	91.189.91.42
	linux_arm5.elf	Get hash	malicious	Chaos	Browse	91.189.91.42
	.i.elf	Get hash	malicious	Unknown	Browse	91.189.91.42
	.i.elf	Get hash	malicious	Unknown	Browse	91.189.91.42
	sshd.elf	Get hash	malicious	Unknown	Browse	91.189.91.42
	linux_mipsel_softfloat.elf	Get hash	malicious	Chaos	Browse	91.189.91.42
	linux_arm7.elf	Get hash	malicious	Chaos	Browse	91.189.91.42
	boatnet.arm5.elf	Get hash	malicious	Mirai	Browse	91.189.91.42
CANONICAL-ASGB	ppc.elf	Get hash	malicious	Unknown	Browse	91.189.91.42
	x86.elf	Get hash	malicious	Unknown	Browse	91.189.91.42
	na.elf	Get hash	malicious	Unknown	Browse	91.189.91.42
	linux_arm5.elf	Get hash	malicious	Chaos	Browse	91.189.91.42
	.i.elf	Get hash	malicious	Unknown	Browse	91.189.91.42
	.i.elf	Get hash	malicious	Unknown	Browse	91.189.91.42
	sshd.elf	Get hash	malicious	Unknown	Browse	91.189.91.42
	linux_mipsel_softfloat.elf	Get hash	malicious	Chaos	Browse	91.189.91.42
	linux_arm7.elf	Get hash	malicious	Chaos	Browse	91.189.91.42
	boatnet.arm5.elf	Get hash	malicious	Mirai	Browse	91.189.91.42
INIT7CH	ppc.elf	Get hash	malicious	Unknown	Browse	109.202.202.202
	x86.elf	Get hash	malicious	Unknown	Browse	109.202.202.202
	na.elf	Get hash	malicious	Unknown	Browse	109.202.202.202
	linux_arm5.elf	Get hash	malicious	Chaos	Browse	109.202.202.202
	.i.elf	Get hash	malicious	Unknown	Browse	109.202.202.202
	.i.elf	Get hash	malicious	Unknown	Browse	109.202.202.202
	sshd.elf	Get hash	malicious	Unknown	Browse	109.202.202.202
	linux_mipsel_softfloat.elf	Get hash	malicious	Chaos	Browse	109.202.202.202
	linux_arm7.elf	Get hash	malicious	Chaos	Browse	109.202.202.202
	boatnet.arm5.elf	Get hash	malicious	Mirai	Browse	109.202.202.202

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):	6.046435715735894
TrID:	ELF Executable and Linkable format (generic) (4004/1) 100.00%
File name:	arm5.elf
File size:	64'852 bytes
MD5:	e35f29fee681a29da563243d4fe47388
SHA1:	deae39dd2a06de25b4a81f25c1ea702d9e49e8b5
SHA256:	bc56f5751afee1fd058f639b097415362c2c37bde32e51489fc68a12ab631e93
SHA512:	527d02fb60d0ae932985bb8d61fcb454ac2246a2b4a65232e24e7d0c85828db3673a28c54b9b5e0703d92d3d8e9753dbf9b11cc3ea220310d61ae3cac552f632
SSDEEP:	1536:2+nSaVH0LKcLDmlVHisKeu3pwrZ5YNu04:+aVH0LGVKeu3pwrHL04
TLSH:	B8532959F9806F11D8D625BEFF4E014973534B6CE3FE7212AE209B2423CA96B0F76416
File Content Preview:	.ELF..............(.........4...........4. ...(........p@...@v..@v..................................X...X...............X...X...X........1..............\...\...\...................Q.td..................................-...L..................@-.,@...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:	0x8194
Flags:	0x4000002
ELF Header Size:	52
Program Header Offset:	52
Program Header Size:	32
Number of Program Headers:	5
Section Header Offset:	64172
Section Header Size:	40
Number of Section Headers:	17
Header String Table Index:	16

Sections

Name	Type	Address	Offset	Size	EntSize	Flags	Flags Description	Link	Align
	NULL	0x0	0x0	0x0	0x0	0x0		0	0
.init	PROGBITS	0x80d4	0xd4	0x10	0x0	0x6	AX	0	4
.text	PROGBITS	0x80f0	0xf0	0xe3f4	0x0	0x6	AX	0	16
.fini	PROGBITS	0x164e4	0xe4e4	0x10	0x0	0x6	AX	0	4
.rodata	PROGBITS	0x164f8	0xe4f8	0x1130	0x0	0x2	A	0	8
.ARM.extab	PROGBITS	0x17628	0xf628	0x18	0x0	0x2	A	0	4
.ARM.exidx	ARM_EXIDX	0x17640	0xf640	0x118	0x0	0x82	AL	2	4
.eh_frame	PROGBITS	0x18758	0xf758	0x4	0x0	0x3	WA	0	4
.tbss	NOBITS	0x1875c	0xf75c	0x8	0x0	0x403	WAT	0	4
.init_array	INIT_ARRAY	0x1875c	0xf75c	0x4	0x0	0x3	WA	0	4
.fini_array	FINI_ARRAY	0x18760	0xf760	0x4	0x0	0x3	WA	0	4
.jcr	PROGBITS	0x18764	0xf764	0x4	0x0	0x3	WA	0	4
.got	PROGBITS	0x18768	0xf768	0xa8	0x4	0x3	WA	0	4
.data	PROGBITS	0x18810	0xf810	0x1fc	0x0	0x3	WA	0	4
.bss	NOBITS	0x18a0c	0xfa0c	0x2f00	0x0	0x3	WA	0	4
.ARM.attributes	ARM_ATTRIBUTES	0x0	0xfa0c	0x16	0x0	0x0		0	1
.shstrtab	STRTAB	0x0	0xfa22	0x88	0x0	0x0		0	1

Program Segments

Type	Offset	Virtual Address	Physical Address	File Size	Memory Size	Entropy	Flags	Flags Description	Align	Section Mappings
EXIDX	0xf640	0x17640	0x17640	0x118	0x118	4.4854	0x4	R	0x4	.ARM.exidx
LOAD	0x0	0x8000	0x8000	0xf758	0xf758	6.0736	0x5	R E	0x1000	.init .text .fini .rodata .ARM.extab .ARM.exidx
LOAD	0xf758	0x18758	0x18758	0x2b4	0x31b4	3.8316	0x6	RW	0x1000	.eh_frame .tbss .init_array .fini_array .jcr .got .data .bss
TLS	0xf75c	0x1875c	0x1875c	0x0	0x8	0.0000	0x4	R	0x4	.tbss
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
Oct 28, 2024 02:03:46.545573950 CET	43928	443	192.168.2.23	91.189.91.42
Oct 28, 2024 02:03:52.176911116 CET	42836	443	192.168.2.23	91.189.91.43
Oct 28, 2024 02:03:53.200800896 CET	42516	80	192.168.2.23	109.202.202.202
Oct 28, 2024 02:04:06.510853052 CET	43928	443	192.168.2.23	91.189.91.42
Oct 28, 2024 02:04:18.797121048 CET	42836	443	192.168.2.23	91.189.91.43
Oct 28, 2024 02:04:22.892597914 CET	42516	80	192.168.2.23	109.202.202.202
Oct 28, 2024 02:04:47.465163946 CET	43928	443	192.168.2.23	91.189.91.42

System Behavior

Analysis Process: arm5.elf PID: 6217, Parent PID: 6137

General

Start time (UTC):	01:03:45
Start date (UTC):	28/10/2024
Path:	/tmp/arm5.elf
Arguments:	/tmp/arm5.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 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

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Warning!

Linux Analysis Report arm5.elf

Overview

General Information

Detection

Signatures

Classification

General Information

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

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

Static ELF Info

ELF header

Sections

Program Segments

Network Behavior

Network Port Distribution

TCP Packets

System Behavior

Analysis Process: arm5.elf PID: 6217, Parent PID: 6137

General

Chronological Activities

Linux Analysis Report
arm5.elf