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Linux Analysis Report
armv4eb.elf

Overview

General Information

Sample name:	armv4eb.elf
Analysis ID:	1584403
MD5:	402855ca6dd8cea3037813ef2426a460
SHA1:	7b1e7d2b76f8f757d9174ec54442a4d428bdd80e
SHA256:	875a7f7214dbd9f49f84780451877ece9d61ae040726746ad51751c588d89ff5
Tags:	elfuser-abuse_ch
Infos:

Detection

Score:	48
Range:	0 - 100
Whitelisted:	false

Signatures

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

Sample deletes itself

Executes the "rm" command used to delete files or directories

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:	1584403
Start date and time:	2025-01-05 13:32:06 +01:00
Joe Sandbox product:	CloudBasic
Overall analysis duration:	0h 4m 38s
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:	armv4eb.elf
Detection:	MAL
Classification:	mal48.spyw.evad.linELF@0/0@0/0

Runtime Messages

Command:	/tmp/armv4eb.elf
PID:	6245
Exit Code:	0
Exit Code Info:
Killed:	False
Standard Output:
Standard Error:

Process Tree

system is lnxubuntu20

dash New Fork (PID: 6218, Parent: 4331)

rm (PID: 6218, Parent: 4331, MD5: aa2b5496fdbfd88e38791ab81f90b95b) Arguments: rm -f /tmp/tmp.cB76OSjPsI /tmp/tmp.ZWBREer8SY /tmp/tmp.XA9RjeNiaz

dash New Fork (PID: 6219, Parent: 4331)

rm (PID: 6219, Parent: 4331, MD5: aa2b5496fdbfd88e38791ab81f90b95b) Arguments: rm -f /tmp/tmp.cB76OSjPsI /tmp/tmp.ZWBREer8SY /tmp/tmp.XA9RjeNiaz

armv4eb.elf (PID: 6245, Parent: 6147, MD5: 6ef685c2c206c9caa9a952987789a1a5) Arguments: /tmp/armv4eb.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

Networking

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

Source: /tmp/armv4eb.elf (PID: 6245)	Opens: /sys/class/net/	Jump to behavior
Source: /tmp/armv4eb.elf (PID: 6245)	Opens: /sys/class/net/ens160/address	Jump to behavior
Source: /tmp/armv4eb.elf (PID: 6245)	Opens: /sys/class/net/ens160/flags	Jump to behavior
Source: /tmp/armv4eb.elf (PID: 6245)	Opens: /sys/class/net/ens160/carrier	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	TCP traffic detected without corresponding DNS query: 91.189.91.43

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.spyw.evad.linELF@0/0@0/0

Source: /usr/bin/dash (PID: 6218)	Rm executable: /usr/bin/rm -> rm -f /tmp/tmp.cB76OSjPsI /tmp/tmp.ZWBREer8SY /tmp/tmp.XA9RjeNiaz			Jump to behavior
Source: /usr/bin/dash (PID: 6219)	Rm executable: /usr/bin/rm -> rm -f /tmp/tmp.cB76OSjPsI /tmp/tmp.ZWBREer8SY /tmp/tmp.XA9RjeNiaz			Jump to behavior

Hooking and other Techniques for Hiding and Protection

Sample deletes itself

Source: /tmp/armv4eb.elf (PID: 6245)

File: /tmp/armv4eb.elf

Jump to behavior

Source: /tmp/armv4eb.elf (PID: 6245)

Queries kernel information via 'uname':

Jump to behavior

Source: armv4eb.elf, 6245.1.000055a173f1d000.000055a17406b000.rw-.sdmp	Binary or memory string: /etc/qemu-binfmt/armeb
Source: armv4eb.elf, 6245.1.00007ffeede17000.00007ffeede38000.rw-.sdmp	Binary or memory string: /usr/bin/qemu-armeb
Source: armv4eb.elf, 6245.1.00007ffeede17000.00007ffeede38000.rw-.sdmp	Binary or memory string: bl}xa"x86_64/usr/bin/qemu-armeb/tmp/armv4eb.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/armv4eb.elf
Source: armv4eb.elf, 6245.1.000055a173f1d000.000055a17406b000.rw-.sdmp	Binary or memory string: U!/etc/qemu-binfmt/armeb

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	11 File Deletion	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

Antivirus, Machine Learning and Genetic Malware Detection

Initial Sample

Source	Detection	Scanner	Label	Link
armv4eb.elf	11%	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	main.arm5.elf	Get hash	malicious	Mirai	Browse
	fuckunix.mpsl.elf	Get hash	malicious	Mirai	Browse
	fuckunix.sh4.elf	Get hash	malicious	Mirai	Browse
	fuckunix.mips.elf	Get hash	malicious	Mirai	Browse
	fuckunix.m68k.elf	Get hash	malicious	Mirai	Browse
	.i.elf	Get hash	malicious	Unknown	Browse
	main_mpsl.elf	Get hash	malicious	Mirai	Browse
	fenty.arm7.elf	Get hash	malicious	Mirai	Browse
	fenty.arm6.elf	Get hash	malicious	Mirai	Browse
	h.elf	Get hash	malicious	Gafgyt	Browse
91.189.91.42	main.arm5.elf	Get hash	malicious	Mirai	Browse
	fuckunix.mpsl.elf	Get hash	malicious	Mirai	Browse
	fuckunix.sh4.elf	Get hash	malicious	Mirai	Browse
	fuckunix.mips.elf	Get hash	malicious	Mirai	Browse
	fuckunix.m68k.elf	Get hash	malicious	Mirai	Browse
	.i.elf	Get hash	malicious	Unknown	Browse
	main_mpsl.elf	Get hash	malicious	Mirai	Browse
	fenty.arm7.elf	Get hash	malicious	Mirai	Browse
	fenty.arm6.elf	Get hash	malicious	Mirai	Browse
	fenty.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	main.arm5.elf	Get hash	malicious	Mirai	Browse	91.189.91.42
	fuckunix.mpsl.elf	Get hash	malicious	Mirai	Browse	91.189.91.42
	fuckunix.sh4.elf	Get hash	malicious	Mirai	Browse	91.189.91.42
	fuckunix.mips.elf	Get hash	malicious	Mirai	Browse	91.189.91.42
	fuckunix.m68k.elf	Get hash	malicious	Mirai	Browse	91.189.91.42
	.i.elf	Get hash	malicious	Unknown	Browse	91.189.91.42
	main_mpsl.elf	Get hash	malicious	Mirai	Browse	91.189.91.42
	fenty.arm7.elf	Get hash	malicious	Mirai	Browse	91.189.91.42
	fenty.arm4.elf	Get hash	malicious	Mirai	Browse	185.125.190.26
	fenty.arm6.elf	Get hash	malicious	Mirai	Browse	91.189.91.42
CANONICAL-ASGB	main.arm5.elf	Get hash	malicious	Mirai	Browse	91.189.91.42
	fuckunix.mpsl.elf	Get hash	malicious	Mirai	Browse	91.189.91.42
	fuckunix.sh4.elf	Get hash	malicious	Mirai	Browse	91.189.91.42
	fuckunix.mips.elf	Get hash	malicious	Mirai	Browse	91.189.91.42
	fuckunix.m68k.elf	Get hash	malicious	Mirai	Browse	91.189.91.42
	.i.elf	Get hash	malicious	Unknown	Browse	91.189.91.42
	main_mpsl.elf	Get hash	malicious	Mirai	Browse	91.189.91.42
	fenty.arm7.elf	Get hash	malicious	Mirai	Browse	91.189.91.42
	fenty.arm4.elf	Get hash	malicious	Mirai	Browse	185.125.190.26
	fenty.arm6.elf	Get hash	malicious	Mirai	Browse	91.189.91.42
INIT7CH	main.arm5.elf	Get hash	malicious	Mirai	Browse	109.202.202.202
	fuckunix.mpsl.elf	Get hash	malicious	Mirai	Browse	109.202.202.202
	fuckunix.sh4.elf	Get hash	malicious	Mirai	Browse	109.202.202.202
	fuckunix.mips.elf	Get hash	malicious	Mirai	Browse	109.202.202.202
	fuckunix.m68k.elf	Get hash	malicious	Mirai	Browse	109.202.202.202
	.i.elf	Get hash	malicious	Unknown	Browse	109.202.202.202
	main_mpsl.elf	Get hash	malicious	Mirai	Browse	109.202.202.202
	fenty.arm7.elf	Get hash	malicious	Mirai	Browse	109.202.202.202
	fenty.arm6.elf	Get hash	malicious	Mirai	Browse	109.202.202.202
	fenty.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 MSB executable, ARM, version 1 (ARM), statically linked, stripped
Entropy (8bit):	6.143834321032246
TrID:	ELF Executable and Linkable format (generic) (4004/1) 100.00%
File name:	armv4eb.elf
File size:	95'232 bytes
MD5:	402855ca6dd8cea3037813ef2426a460
SHA1:	7b1e7d2b76f8f757d9174ec54442a4d428bdd80e
SHA256:	875a7f7214dbd9f49f84780451877ece9d61ae040726746ad51751c588d89ff5
SHA512:	37c51d518b7022e57342a41cb5a93aa40b5b6c777caafbea31121363c485876b72ae672c357ee4960b2d4f2f52d1454f29e2c172d18b911a5e3b3465dd940abe
SSDEEP:	1536:qtZvcqLYDi/EbyIJ+kvSY6joARjpH/UR7ZWOSOSkDTXqhABZPy:qbvhYvB7upfakOSzkD+ABZK
TLSH:	75935B80B6189C31D06C2C3767BBE78E3B2719D49993E121D454E7CFBB8F6C16E540AA
File Content Preview:	.ELF...a...........(...........4..rH.....4. ...(......................l@..l@..............p...p...p.......D.........dt.Q.................................-...L....."..V..........-@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, big 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:	0x202
ELF Header Size:	52
Program Header Offset:	52
Program Header Size:	32
Number of Program Headers:	3
Section Header Offset:	94792
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	0x158f0	0x0	0x6	AX	16
.fini	PROGBITS	0x1d9a0	0x159a0	0x14	0x0	0x6	AX	4
.rodata	PROGBITS	0x1d9c0	0x159c0	0x1280	0x0	0x2	A	32
.eh_frame	PROGBITS	0x27000	0x17000	0x4	0x0	0x3	WA	4
.ctors	PROGBITS	0x27004	0x17004	0x8	0x0	0x3	WA	4
.dtors	PROGBITS	0x2700c	0x1700c	0x8	0x0	0x3	WA	4
.data	PROGBITS	0x27018	0x17018	0x1e8	0x0	0x3	WA	4
.bss	NOBITS	0x27200	0x17200	0x42dc	0x0	0x3	WA	4
.shstrtab	STRTAB	0x0	0x17200	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	0x16c40	0x16c40	6.1980	0x5	R E	0x8000	.init .text .fini .rodata
LOAD	0x17000	0x27000	0x27000	0x200	0x44dc	2.1169	0x6	RW	0x8000	.eh_frame .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 5, 2025 13:32:52.457145929 CET	43928	443	192.168.2.23	91.189.91.42
Jan 5, 2025 13:32:58.088366032 CET	42836	443	192.168.2.23	91.189.91.43
Jan 5, 2025 13:32:59.112205029 CET	42516	80	192.168.2.23	109.202.202.202
Jan 5, 2025 13:33:13.446383953 CET	43928	443	192.168.2.23	91.189.91.42
Jan 5, 2025 13:33:23.684981108 CET	42836	443	192.168.2.23	91.189.91.43
Jan 5, 2025 13:33:29.828156948 CET	42516	80	192.168.2.23	109.202.202.202
Jan 5, 2025 13:33:54.400646925 CET	43928	443	192.168.2.23	91.189.91.42
Jan 5, 2025 13:34:14.877821922 CET	42836	443	192.168.2.23	91.189.91.43

System Behavior

Analysis Process: dash PID: 6218, Parent PID: 4331

General

Start time (UTC):	12:32:48
Start date (UTC):	05/01/2025
Path:	/usr/bin/dash
Arguments:	-
File size:	129816 bytes
MD5 hash:	1e6b1c887c59a315edb7eb9a315fc84c

Chronological Activities

Analysis Process: rm PID: 6218, Parent PID: 4331

General

Start time (UTC):	12:32:48
Start date (UTC):	05/01/2025
Path:	/usr/bin/rm
Arguments:	rm -f /tmp/tmp.cB76OSjPsI /tmp/tmp.ZWBREer8SY /tmp/tmp.XA9RjeNiaz
File size:	72056 bytes
MD5 hash:	aa2b5496fdbfd88e38791ab81f90b95b

Chronological Activities

Analysis Process: dash PID: 6219, Parent PID: 4331

General

Start time (UTC):	12:32:48
Start date (UTC):	05/01/2025
Path:	/usr/bin/dash
Arguments:	-
File size:	129816 bytes
MD5 hash:	1e6b1c887c59a315edb7eb9a315fc84c

Chronological Activities

Analysis Process: rm PID: 6219, Parent PID: 4331

General

Start time (UTC):	12:32:48
Start date (UTC):	05/01/2025
Path:	/usr/bin/rm
Arguments:	rm -f /tmp/tmp.cB76OSjPsI /tmp/tmp.ZWBREer8SY /tmp/tmp.XA9RjeNiaz
File size:	72056 bytes
MD5 hash:	aa2b5496fdbfd88e38791ab81f90b95b

Chronological Activities

Analysis Process: armv4eb.elf PID: 6245, Parent PID: 6147

General

Start time (UTC):	12:32:50
Start date (UTC):	05/01/2025
Path:	/tmp/armv4eb.elf
Arguments:	/tmp/armv4eb.elf
File size:	4965048 bytes
MD5 hash:	6ef685c2c206c9caa9a952987789a1a5

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 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 armv4eb.elf

Overview

General Information

Detection

Signatures

Classification

General Information

Runtime Messages

Process Tree

Yara Signatures

Suricata Signatures

Joe Sandbox Signatures

Networking

System Summary

Persistence and Installation Behavior

Hooking and other Techniques for Hiding and Protection

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

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: dash PID: 6218, Parent PID: 4331

General

Chronological Activities

Analysis Process: rm PID: 6218, Parent PID: 4331

General

Chronological Activities

Analysis Process: dash PID: 6219, Parent PID: 4331

General

Chronological Activities

Analysis Process: rm PID: 6219, Parent PID: 4331

General

Chronological Activities

Analysis Process: armv4eb.elf PID: 6245, Parent PID: 6147

General

Chronological Activities

Linux Analysis Report
armv4eb.elf