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Linux Analysis Report
arm5.elf

Overview

General Information

Sample name:	arm5.elf
Analysis ID:	1583510
MD5:	9840b87c8e51506f7925b53334279e95
SHA1:	414f00cb1705133e56776052d2184ec155371e48
SHA256:	1e3a82d74bc23da324cdc2471926633321086dea72e4556535d2915c77c418c0
Tags:	elfuser-abuse_ch
Infos:

Detection

Score:	48
Range:	0 - 100
Whitelisted:	false

Signatures

Multi AV Scanner detection for submitted file

Found strings indicative of a multi-platform dropper

Sample has stripped symbol table

Sample listens on a socket

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:	1583510
Start date and time:	2025-01-02 22:27:05 +01:00
Joe Sandbox product:	CloudBasic
Overall analysis duration:	0h 4m 26s
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

Warnings

VT rate limit hit for: arm5.elf

Runtime Messages

Command:	/tmp/arm5.elf
PID:	6221
Exit Code:	139
Exit Code Info:	SIGSEGV (11) Segmentation fault invalid memory reference
Killed:	False
Standard Output:
Standard Error:	qemu: uncaught target signal 11 (Segmentation fault) - core dumped

Process Tree

system is lnxubuntu20

arm5.elf (PID: 6221, Parent: 6141, 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: 15%

Source: arm5.elf	String: ash\|login\|wget\|curl\|tftp\|ntpdate\|ftp
Source: arm5.elf	String: /proc//cmdline/mapsselfrebootftpwgetmountunmount-shashtftpcurl/bin/login/exe\|ash\|login\|wget\|curl\|tftp\|ntpdate\|ftp/proc/mountsr (deleted)/proc/%s/statusPPid:/fdsocket\|proc/usr/bin/usr/sbin/system/mnt/mtd/app/org/z/zbin/home/app/dvr/bin/duksan/userfs/mnt/app/usr/etc/dvr/main/usr/local/var/bin/tmp/sqfs/z/bin/dvr/mnt/mtd/zconf/gm/bin/home/process/var/challenge/var/Sofia/usr/lib/lib/systemd//usr/lib/systemd/system/system/bin//mnt//home/helper/home/davinci/usr/libexec//sbin//bin/

Source: /tmp/arm5.elf (PID: 6221)

Socket: 127.0.0.1:43478

Jump to behavior

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: 6221)

Queries kernel information via 'uname':

Jump to behavior

Source: arm5.elf, 6221.1.00007ffdb5207000.00007ffdb5228000.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, 6221.1.000055f20478c000.000055f2048da000.rw-.sdmp	Binary or memory string: U!/etc/qemu-binfmt/arm
Source: arm5.elf, 6221.1.000055f20478c000.000055f2048da000.rw-.sdmp	Binary or memory string: /etc/qemu-binfmt/arm
Source: arm5.elf, 6221.1.00007ffdb5207000.00007ffdb5228000.rw-.sdmp	Binary or memory string: /usr/bin/qemu-arm
Source: arm5.elf, 6221.1.00007ffdb5207000.00007ffdb5228000.rw-.sdmp	Binary or memory string: qemu: uncaught target signal 11 (Segmentation fault) - core dumped

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	1 Scripting	Valid Accounts	Windows Management Instrumentation	1 Scripting	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	16%	ReversingLabs	Linux.Trojan.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	nn.elf	Get hash	malicious	Nanominer, Xmrig	Browse
	i.elf	Get hash	malicious	Unknown	Browse
	Aqua.arm7.elf	Get hash	malicious	Mirai	Browse
	ZohoAssistURS	Get hash	malicious	Unknown	Browse
	.i.elf	Get hash	malicious	Unknown	Browse
	file-grey.elf	Get hash	malicious	Unknown	Browse
	Aqua.mips.elf	Get hash	malicious	Unknown	Browse
	Aqua.mpsl.elf	Get hash	malicious	Unknown	Browse
	DEMONS.mips.elf	Get hash	malicious	Unknown	Browse
	i.elf	Get hash	malicious	Unknown	Browse
91.189.91.42	nn.elf	Get hash	malicious	Nanominer, Xmrig	Browse
	i.elf	Get hash	malicious	Unknown	Browse
	Aqua.arm7.elf	Get hash	malicious	Mirai	Browse
	ZohoAssistURS	Get hash	malicious	Unknown	Browse
	.i.elf	Get hash	malicious	Unknown	Browse
	file-grey.elf	Get hash	malicious	Unknown	Browse
	Aqua.mips.elf	Get hash	malicious	Unknown	Browse
	Aqua.mpsl.elf	Get hash	malicious	Unknown	Browse
	DEMONS.mips.elf	Get hash	malicious	Unknown	Browse
	i.elf	Get hash	malicious	Unknown	Browse

Domains

⊘No context

ASNs

Match	Associated Sample Name / URL	SHA 256	Detection	Threat Name	Link	Context
CANONICAL-ASGB	nn.elf	Get hash	malicious	Nanominer, Xmrig	Browse	91.189.91.42
	i.elf	Get hash	malicious	Unknown	Browse	91.189.91.42
	Aqua.arm7.elf	Get hash	malicious	Mirai	Browse	91.189.91.42
	ZohoAssistURS	Get hash	malicious	Unknown	Browse	91.189.91.42
	.i.elf	Get hash	malicious	Unknown	Browse	91.189.91.42
	file-grey.elf	Get hash	malicious	Unknown	Browse	91.189.91.42
	Aqua.mips.elf	Get hash	malicious	Unknown	Browse	91.189.91.42
	Aqua.mpsl.elf	Get hash	malicious	Unknown	Browse	91.189.91.42
	DEMONS.mips.elf	Get hash	malicious	Unknown	Browse	91.189.91.42
	DEMONS.arm5.elf	Get hash	malicious	Unknown	Browse	185.125.190.26
CANONICAL-ASGB	nn.elf	Get hash	malicious	Nanominer, Xmrig	Browse	91.189.91.42
	i.elf	Get hash	malicious	Unknown	Browse	91.189.91.42
	Aqua.arm7.elf	Get hash	malicious	Mirai	Browse	91.189.91.42
	ZohoAssistURS	Get hash	malicious	Unknown	Browse	91.189.91.42
	.i.elf	Get hash	malicious	Unknown	Browse	91.189.91.42
	file-grey.elf	Get hash	malicious	Unknown	Browse	91.189.91.42
	Aqua.mips.elf	Get hash	malicious	Unknown	Browse	91.189.91.42
	Aqua.mpsl.elf	Get hash	malicious	Unknown	Browse	91.189.91.42
	DEMONS.mips.elf	Get hash	malicious	Unknown	Browse	91.189.91.42
	DEMONS.arm5.elf	Get hash	malicious	Unknown	Browse	185.125.190.26
INIT7CH	nn.elf	Get hash	malicious	Nanominer, Xmrig	Browse	109.202.202.202
	i.elf	Get hash	malicious	Unknown	Browse	109.202.202.202
	Aqua.arm7.elf	Get hash	malicious	Mirai	Browse	109.202.202.202
	ZohoAssistURS	Get hash	malicious	Unknown	Browse	109.202.202.202
	.i.elf	Get hash	malicious	Unknown	Browse	109.202.202.202
	file-grey.elf	Get hash	malicious	Unknown	Browse	109.202.202.202
	Aqua.mips.elf	Get hash	malicious	Unknown	Browse	109.202.202.202
	Aqua.mpsl.elf	Get hash	malicious	Unknown	Browse	109.202.202.202
	DEMONS.mips.elf	Get hash	malicious	Unknown	Browse	109.202.202.202
	i.elf	Get hash	malicious	Unknown	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, version 1 (ARM), statically linked, stripped
Entropy (8bit):	5.988705364244417
TrID:	ELF Executable and Linkable format (generic) (4004/1) 100.00%
File name:	arm5.elf
File size:	72'268 bytes
MD5:	9840b87c8e51506f7925b53334279e95
SHA1:	414f00cb1705133e56776052d2184ec155371e48
SHA256:	1e3a82d74bc23da324cdc2471926633321086dea72e4556535d2915c77c418c0
SHA512:	5f1abc071facc2bd57aad83d8421eaba366842aa97be5fcbd2bc01c1f5ed886fe9e1862e52b4cdd14881a9bdc1e369354f4b207ab67e05934fcbef6d58d68aa0
SSDEEP:	1536:3bLI8N8sP8a6O9tEu4hzi40hfqxRxO4M56Sa7zR:3BN8sP8anEu4hzi4dxRw5aHR
TLSH:	A563F885BC829A12C6C556BBFF4F428937262398E3EE3203DD259F2137CB95B0E67141
File Content Preview:	.ELF...a..........(.........4...........4. ...(.....................................................t...,g..........Q.td..................................-...L."...Y=..........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:	71868
Section Header Size:	40
Number of Section Headers:	10
Header String Table Index:	9

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	0xf59c	0x0	0x6	AX	16
.fini	PROGBITS	0x1764c	0xf64c	0x14	0x0	0x6	AX	4
.rodata	PROGBITS	0x17660	0xf660	0x1da4	0x0	0x2	A	4
.ctors	PROGBITS	0x21408	0x11408	0x8	0x0	0x3	WA	4
.dtors	PROGBITS	0x21410	0x11410	0x8	0x0	0x3	WA	4
.data	PROGBITS	0x2141c	0x1141c	0x460	0x0	0x3	WA	4
.bss	NOBITS	0x2187c	0x1187c	0x62b8	0x0	0x3	WA	4
.shstrtab	STRTAB	0x0	0x1187c	0x3e	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	0x11404	0x11404	6.0203	0x5	R E	0x8000	.init .text .fini .rodata
LOAD	0x11408	0x21408	0x21408	0x474	0x672c	3.3309	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
Jan 2, 2025 22:27:44.696999073 CET	43928	443	192.168.2.23	91.189.91.42
Jan 2, 2025 22:27:50.328224897 CET	42836	443	192.168.2.23	91.189.91.43
Jan 2, 2025 22:27:51.863964081 CET	42516	80	192.168.2.23	109.202.202.202
Jan 2, 2025 22:28:04.918337107 CET	43928	443	192.168.2.23	91.189.91.42
Jan 2, 2025 22:28:17.205044985 CET	42836	443	192.168.2.23	91.189.91.43
Jan 2, 2025 22:28:21.299993992 CET	42516	80	192.168.2.23	109.202.202.202
Jan 2, 2025 22:28:45.872905970 CET	43928	443	192.168.2.23	91.189.91.42

System Behavior

Analysis Process: arm5.elf PID: 6221, Parent PID: 6141

General

Start time (UTC):	21:27:42
Start date (UTC):	02/01/2025
Path:	/tmp/arm5.elf
Arguments:	/tmp/arm5.elf
File size:	4956856 bytes
MD5 hash:	5ebfcae4fe2471fcc5695c2394773ff1

Description:	This technique has been deprecated. Please use Command and Scripting Interpreter where appropriate.
Tactics:	Defense Evasion, Execution
Data Sources:
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 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

Warnings

Runtime Messages

Process Tree

Yara Signatures

Suricata Signatures

Joe Sandbox Signatures

AV Detection

Spreading

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: 6221, Parent PID: 6141

General

Chronological Activities

Linux Analysis Report
arm5.elf