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Linux Analysis Report
armv5l.elf

Overview

General Information

Sample name:	armv5l.elf
Analysis ID:	1575424
MD5:	830776d8357e4f1c6101dc76a1a6b2ca
SHA1:	26f0d2ec318ecae87f37d477e4a623e2ee9e7f77
SHA256:	3d73a5656daaa94feb4ae135f78cfc6341e1de9cc730b28f8fbf91fd315a484d
Tags:	elfuser-abuse_ch
Infos:

Detection

Score:	60
Range:	0 - 100
Whitelisted:	false

Signatures

Multi AV Scanner detection for submitted file

Opens /sys/class/net/* files useful for querying network interface information

Performs DNS TXT record lookups

Sample deletes itself

Detected TCP or UDP traffic on non-standard ports

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:	1575424
Start date and time:	2024-12-15 14:55:02 +01:00
Joe Sandbox product:	CloudBasic
Overall analysis duration:	0h 4m 21s
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:	armv5l.elf
Detection:	MAL
Classification:	mal60.spyw.evad.linELF@0/0@1/0

Runtime Messages

Command:	/tmp/armv5l.elf
PID:	5525
Exit Code:	0
Exit Code Info:
Killed:	False
Standard Output:	Firmware update in progress
Standard Error:

Process Tree

system is lnxubuntu20

armv5l.elf (PID: 5525, Parent: 5450, MD5: 5ebfcae4fe2471fcc5695c2394773ff1) Arguments: /tmp/armv5l.elf

armv5l.elf New Fork (PID: 5527, Parent: 5525)

armv5l.elf New Fork (PID: 5538, Parent: 5527)

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: armv5l.elf

ReversingLabs: Detection: 13%

Networking

Opens /sys/class/net/* files useful for querying network interface information

Source: /tmp/armv5l.elf (PID: 5527)	Opens: /sys/class/net/	Jump to behavior
Source: /tmp/armv5l.elf (PID: 5527)	Opens: /sys/class/net/ens160/address	Jump to behavior
Source: /tmp/armv5l.elf (PID: 5527)	Opens: /sys/class/net/ens160/flags	Jump to behavior
Source: /tmp/armv5l.elf (PID: 5527)	Opens: /sys/class/net/ens160/carrier	Jump to behavior

Source: global traffic

TCP traffic: 192.168.2.15:38182 -> 5.231.4.240:7777

Source: unknown	TCP traffic detected without corresponding DNS query: 5.231.4.240
Source: unknown	TCP traffic detected without corresponding DNS query: 5.231.4.240
Source: unknown	TCP traffic detected without corresponding DNS query: 5.231.4.240
Source: unknown	TCP traffic detected without corresponding DNS query: 5.231.4.240
Source: unknown	TCP traffic detected without corresponding DNS query: 5.231.4.240
Source: unknown	UDP traffic detected without corresponding DNS query: 172.217.192.127
Source: unknown	UDP traffic detected without corresponding DNS query: 65.21.1.106

Source: global traffic

DNS traffic detected: DNS query: iranistrash.libre

Source: ELF static info symbol of initial sample

.symtab present: no

Source: classification engine

Classification label: mal60.spyw.evad.linELF@0/0@1/0

Hooking and other Techniques for Hiding and Protection

Sample deletes itself

Source: /tmp/armv5l.elf (PID: 5525)

File: /tmp/armv5l.elf

Jump to behavior

Source: /tmp/armv5l.elf (PID: 5525)	Queries kernel information via 'uname':			Jump to behavior
Source: /tmp/armv5l.elf (PID: 5527)	Queries kernel information via 'uname':			Jump to behavior

Source: armv5l.elf, 5525.1.000055dd98d4c000.000055dd98e7a000.rw-.sdmp	Binary or memory string: U!/etc/qemu-binfmt/arm
Source: armv5l.elf, 5525.1.000055dd98d4c000.000055dd98e7a000.rw-.sdmp	Binary or memory string: /etc/qemu-binfmt/arm
Source: armv5l.elf, 5525.1.00007ffc5959a000.00007ffc595bb000.rw-.sdmp	Binary or memory string: /usr/bin/qemu-arm
Source: armv5l.elf, 5525.1.00007ffc5959a000.00007ffc595bb000.rw-.sdmp	Binary or memory string: x86_64/usr/bin/qemu-arm/tmp/armv5l.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/armv5l.elf

HIPS / PFW / Operating System Protection Evasion

Performs DNS TXT record lookups

Source: Traffic

DNS traffic detected: queries for: iranistrash.libre

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	11 Security Software Discovery	Remote Services	Data from Local System	1 Non-Standard Port	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-Application Layer Protocol	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 Application Layer Protocol	Automated Exfiltration	Data Encrypted for Impact

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
armv5l.elf	13%	ReversingLabs	Linux.Trojan.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
iranistrash.libre	unknown	unknown	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
5.231.4.240	unknown	Germany		12586	ASGHOSTNETDE	false
172.217.192.127	unknown	United States		15169	GOOGLEUS	false

Joe Sandbox View / Context

IPs

Match	Associated Sample Name / URL	SHA 256	Detection	Threat Name	Link
5.231.4.240	armv6l.elf	Get hash	malicious	Unknown	Browse
	superh.elf	Get hash	malicious	Unknown	Browse
	mipsel.elf	Get hash	malicious	Unknown	Browse

Domains

⊘No context

ASNs

Match	Associated Sample Name / URL	SHA 256	Detection	Threat Name	Link	Context
ASGHOSTNETDE	armv6l.elf	Get hash	malicious	Unknown	Browse	5.231.4.240
	superh.elf	Get hash	malicious	Unknown	Browse	5.231.4.240
	armv7l.elf	Get hash	malicious	Unknown	Browse	89.144.41.169
	mipsel.elf	Get hash	malicious	Unknown	Browse	5.231.4.240
	mipsel64.elf	Get hash	malicious	Unknown	Browse	5.230.251.14
	powerpc.elf	Get hash	malicious	Unknown	Browse	5.230.33.236
	jmggnxeedy.elf	Get hash	malicious	Unknown	Browse	94.249.207.54
	la.bot.mips.elf	Get hash	malicious	Unknown	Browse	94.249.188.214
	powerpc.nn.elf	Get hash	malicious	Mirai, Okiru	Browse	195.200.192.218
	arm5.elf	Get hash	malicious	Unknown	Browse	5.83.147.14

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):	6.06885987902641
TrID:	ELF Executable and Linkable format (generic) (4004/1) 100.00%
File name:	armv5l.elf
File size:	67'108 bytes
MD5:	830776d8357e4f1c6101dc76a1a6b2ca
SHA1:	26f0d2ec318ecae87f37d477e4a623e2ee9e7f77
SHA256:	3d73a5656daaa94feb4ae135f78cfc6341e1de9cc730b28f8fbf91fd315a484d
SHA512:	c6e1a496dfad7f7d55bf72e3245a87ae97b9be0e4a392fb7dce884d7ad7fb12d364414b910426f269d8556a4320c65525eaf463207d6f226f8394b5a2dda682f
SSDEEP:	768:6376gbLDvOSIIfM6VOP/nYVHpyNM26dBAno6LufZVawJUlNd6AZXyT7JxHLMfoIM:zcLzfR+MyNM26rAnoQuhhJW6AIvJxgc
TLSH:	2A6328867D818A12C9E43277FA1E42CD376227E8E2DE32178D225F55B7CAC2B0D37651
File Content Preview:	.ELF...a..........(.........4...l.......4. ...(.....................................................................Q.td..................................-...L."....>..........0@-.\P...0....S.0...P@...0... ....R......0...0...........0... ....R..... 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:	ARM - ABI
ABI Version:	0
Entry Point Address:	0x8190
Flags:	0x2
ELF Header Size:	52
Program Header Offset:	52
Program Header Size:	32
Number of Program Headers:	3
Section Header Offset:	66668
Section Header Size:	40
Number of Section Headers:	11
Header String Table Index:	10

Sections

Name	Type	Address	Offset	Size	EntSize	Flags	Flags Description	Align
	NULL	0x0	0x0	0x0	0x0	0x0		0
.init	PROGBITS	0x8094	0x94	0x18	0x0	0x6	AX	4
.text	PROGBITS	0x80b0	0xb0	0xfa6c	0x0	0x6	AX	16
.fini	PROGBITS	0x17b1c	0xfb1c	0x14	0x0	0x6	AX	4
.rodata	PROGBITS	0x17b30	0xfb30	0x754	0x0	0x2	A	4
.eh_frame	PROGBITS	0x18284	0x10284	0x4	0x0	0x2	A	4
.ctors	PROGBITS	0x20288	0x10288	0x8	0x0	0x3	WA	4
.dtors	PROGBITS	0x20290	0x10290	0x8	0x0	0x3	WA	4
.data	PROGBITS	0x2029c	0x1029c	0x188	0x0	0x3	WA	4
.bss	NOBITS	0x20424	0x10424	0x1458	0x0	0x3	WA	4
.shstrtab	STRTAB	0x0	0x10424	0x48	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	0x10288	0x10288	6.0960	0x5	R E	0x8000	.init .text .fini .rodata .eh_frame
LOAD	0x10288	0x20288	0x20288	0x19c	0x15f4	1.2472	0x6	RW	0x8000	.ctors .dtors .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
Dec 15, 2024 14:55:45.406306982 CET	38182	7777	192.168.2.15	5.231.4.240
Dec 15, 2024 14:55:45.526374102 CET	7777	38182	5.231.4.240	192.168.2.15
Dec 15, 2024 14:55:45.526632071 CET	38182	7777	192.168.2.15	5.231.4.240
Dec 15, 2024 14:55:45.527065992 CET	38182	7777	192.168.2.15	5.231.4.240
Dec 15, 2024 14:55:45.646892071 CET	7777	38182	5.231.4.240	192.168.2.15
Dec 15, 2024 14:55:46.889523983 CET	7777	38182	5.231.4.240	192.168.2.15
Dec 15, 2024 14:55:46.889715910 CET	38182	7777	192.168.2.15	5.231.4.240
Dec 15, 2024 14:56:56.959445000 CET	38182	7777	192.168.2.15	5.231.4.240
Dec 15, 2024 14:56:57.079905033 CET	7777	38182	5.231.4.240	192.168.2.15

UDP Packets

Timestamp	Source Port	Dest Port	Source IP	Dest IP
Dec 15, 2024 14:55:43.919951916 CET	25168	3478	192.168.2.15	172.217.192.127
Dec 15, 2024 14:55:45.120307922 CET	3478	25168	172.217.192.127	192.168.2.15
Dec 15, 2024 14:55:45.139931917 CET	50784	53	192.168.2.15	65.21.1.106
Dec 15, 2024 14:55:45.404457092 CET	53	50784	65.21.1.106	192.168.2.15

DNS Queries

Timestamp	Source IP	Dest IP	Trans ID	OP Code	Name	Type	Class	DNS over HTTPS
Dec 15, 2024 14:55:45.139931917 CET	192.168.2.15	65.21.1.106	0xe32d	Standard query (0)	iranistrash.libre	16	IN (0x0001)	false

DNS Answers

Timestamp	Source IP	Dest IP	Trans ID	Reply Code	Name	CName	Address	Type	Class	DNS over HTTPS
Dec 15, 2024 14:55:45.404457092 CET	65.21.1.106	192.168.2.15	0xe32d	No error (0)	iranistrash.libre			TXT (Text strings)	IN (0x0001)	false

System Behavior

Analysis Process: armv5l.elf PID: 5525, Parent PID: 5450

General

Start time (UTC):	13:55:40
Start date (UTC):	15/12/2024
Path:	/tmp/armv5l.elf
Arguments:	/tmp/armv5l.elf
File size:	4956856 bytes
MD5 hash:	5ebfcae4fe2471fcc5695c2394773ff1

Chronological Activities

Analysis Process: armv5l.elf PID: 5527, Parent PID: 5525

General

Start time (UTC):	13:55:43
Start date (UTC):	15/12/2024
Path:	/tmp/armv5l.elf
Arguments:	-
File size:	4956856 bytes
MD5 hash:	5ebfcae4fe2471fcc5695c2394773ff1

Chronological Activities

Analysis Process: armv5l.elf PID: 5538, Parent PID: 5527

General

Start time (UTC):	13:55:44
Start date (UTC):	15/12/2024
Path:	/tmp/armv5l.elf
Arguments:	-
File size:	4956856 bytes
MD5 hash:	5ebfcae4fe2471fcc5695c2394773ff1

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 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 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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Linux Analysis Report armv5l.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

Hooking and other Techniques for Hiding and Protection

Malware Analysis System Evasion

HIPS / PFW / Operating System Protection 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

UDP Packets

DNS Queries

DNS Answers

System Behavior

Analysis Process: armv5l.elf PID: 5525, Parent PID: 5450

General

Chronological Activities

Analysis Process: armv5l.elf PID: 5527, Parent PID: 5525

General

Chronological Activities

Analysis Process: armv5l.elf PID: 5538, Parent PID: 5527

General

Chronological Activities

Linux Analysis Report
armv5l.elf