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Linux Analysis Report
t6.elf

Overview

General Information

Sample name:	t6.elf
Analysis ID:	1589786
MD5:	a848a60e516279d77ae9dcfe62968008
SHA1:	5600ff20bd392a9997079e20290ea4d8f9378291
SHA256:	ddf238bae27051a009f14c272850191202bbd0f8f8ca38c95282ee594a9fc63b
Tags:	elfuser-abuse_ch
Infos:

Detection

Score:	48
Range:	0 - 100
Whitelisted:	false

Signatures

Multi AV Scanner detection for submitted file

Enumerates processes within the "proc" file system

Sample has stripped symbol table

Sample tries to kill a process (SIGKILL)

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

Classification

General Information

Joe Sandbox version:	42.0.0 Malachite
Analysis ID:	1589786
Start date and time:	2025-01-13 06:56:08 +01:00
Joe Sandbox product:	CloudBasic
Overall analysis duration:	0h 4m 29s
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:	t6.elf
Detection:	MAL
Classification:	mal48.linELF@0/0@2/0

Runtime Messages

Command:	/tmp/t6.elf
PID:	5430
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

t6.elf (PID: 5430, Parent: 5352, MD5: 5ebfcae4fe2471fcc5695c2394773ff1) Arguments: /tmp/t6.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: t6.elf

ReversingLabs: Detection: 28%

Source: global traffic

DNS traffic detected: DNS query: daisy.ubuntu.com

Source: t6.elf, 5430.1.00007fa3e4035000.00007fa3e403a000.rw-.sdmp	String found in binary or memory: http://1/wget.sh
Source: t6.elf, 5430.1.00007fa3e4035000.00007fa3e403a000.rw-.sdmp	String found in binary or memory: http://9/curl.sh
Source: t6.elf, 5430.1.00007fa3e4035000.00007fa3e403a000.rw-.sdmp	String found in binary or memory: http://schemas.xmlsoap.org/soap/encoding/
Source: t6.elf, 5430.1.00007fa3e4035000.00007fa3e403a000.rw-.sdmp	String found in binary or memory: http://schemas.xmlsoap.org/soap/envelope/

Source: ELF static info symbol of initial sample

.symtab present: no

Source: /tmp/t6.elf (PID: 5430)

SIGKILL sent: pid: 884, result: successful

Jump to behavior

Source: classification engine

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

Source: /tmp/t6.elf (PID: 5430)	File opened: /proc/5430/status	Jump to behavior
Source: /tmp/t6.elf (PID: 5430)	File opened: /proc/490/cmdline	Jump to behavior
Source: /tmp/t6.elf (PID: 5430)	File opened: /proc/490/cmdline	Jump to behavior
Source: /tmp/t6.elf (PID: 5430)	File opened: /proc/790/cmdline	Jump to behavior
Source: /tmp/t6.elf (PID: 5430)	File opened: /proc/790/cmdline	Jump to behavior
Source: /tmp/t6.elf (PID: 5430)	File opened: /proc/780/cmdline	Jump to behavior
Source: /tmp/t6.elf (PID: 5430)	File opened: /proc/780/cmdline	Jump to behavior
Source: /tmp/t6.elf (PID: 5430)	File opened: /proc/660/cmdline	Jump to behavior
Source: /tmp/t6.elf (PID: 5430)	File opened: /proc/660/cmdline	Jump to behavior
Source: /tmp/t6.elf (PID: 5430)	File opened: /proc/792/cmdline	Jump to behavior
Source: /tmp/t6.elf (PID: 5430)	File opened: /proc/792/cmdline	Jump to behavior
Source: /tmp/t6.elf (PID: 5430)	File opened: /proc/1/cmdline	Jump to behavior
Source: /tmp/t6.elf (PID: 5430)	File opened: /proc/1/cmdline	Jump to behavior
Source: /tmp/t6.elf (PID: 5430)	File opened: /proc/793/cmdline	Jump to behavior
Source: /tmp/t6.elf (PID: 5430)	File opened: /proc/793/cmdline	Jump to behavior
Source: /tmp/t6.elf (PID: 5430)	File opened: /proc/783/cmdline	Jump to behavior
Source: /tmp/t6.elf (PID: 5430)	File opened: /proc/783/cmdline	Jump to behavior
Source: /tmp/t6.elf (PID: 5430)	File opened: /proc/795/cmdline	Jump to behavior
Source: /tmp/t6.elf (PID: 5430)	File opened: /proc/795/cmdline	Jump to behavior
Source: /tmp/t6.elf (PID: 5430)	File opened: /proc/884/cmdline	Jump to behavior
Source: /tmp/t6.elf (PID: 5430)	File opened: /proc/884/cmdline	Jump to behavior
Source: /tmp/t6.elf (PID: 5430)	File opened: /proc/797/cmdline	Jump to behavior
Source: /tmp/t6.elf (PID: 5430)	File opened: /proc/797/cmdline	Jump to behavior
Source: /tmp/t6.elf (PID: 5430)	File opened: /proc/765/cmdline	Jump to behavior
Source: /tmp/t6.elf (PID: 5430)	File opened: /proc/765/cmdline	Jump to behavior
Source: /tmp/t6.elf (PID: 5430)	File opened: /proc/767/cmdline	Jump to behavior
Source: /tmp/t6.elf (PID: 5430)	File opened: /proc/767/cmdline	Jump to behavior
Source: /tmp/t6.elf (PID: 5430)	File opened: /proc/778/cmdline	Jump to behavior
Source: /tmp/t6.elf (PID: 5430)	File opened: /proc/778/cmdline	Jump to behavior
Source: /tmp/t6.elf (PID: 5430)	File opened: /proc/800/cmdline	Jump to behavior
Source: /tmp/t6.elf (PID: 5430)	File opened: /proc/800/cmdline	Jump to behavior
Source: /tmp/t6.elf (PID: 5430)	File opened: /proc/855/cmdline	Jump to behavior
Source: /tmp/t6.elf (PID: 5430)	File opened: /proc/855/cmdline	Jump to behavior
Source: /tmp/t6.elf (PID: 5430)	File opened: /proc/802/cmdline	Jump to behavior
Source: /tmp/t6.elf (PID: 5430)	File opened: /proc/802/cmdline	Jump to behavior
Source: /tmp/t6.elf (PID: 5430)	File opened: /proc/726/cmdline	Jump to behavior
Source: /tmp/t6.elf (PID: 5430)	File opened: /proc/726/cmdline	Jump to behavior
Source: /tmp/t6.elf (PID: 5430)	File opened: /proc/803/cmdline	Jump to behavior
Source: /tmp/t6.elf (PID: 5430)	File opened: /proc/803/cmdline	Jump to behavior
Source: /tmp/t6.elf (PID: 5430)	File opened: /proc/727/cmdline	Jump to behavior
Source: /tmp/t6.elf (PID: 5430)	File opened: /proc/727/cmdline	Jump to behavior
Source: /tmp/t6.elf (PID: 5430)	File opened: /proc/816/cmdline	Jump to behavior
Source: /tmp/t6.elf (PID: 5430)	File opened: /proc/816/cmdline	Jump to behavior

Source: /tmp/t6.elf (PID: 5430)

Queries kernel information via 'uname':

Jump to behavior

Source: t6.elf, 5430.1.00007ffead268000.00007ffead289000.rw-.sdmp	Binary or memory string: #x86_64/usr/bin/qemu-arm/tmp/t6.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/t6.elf
Source: t6.elf, 5430.1.00005617c855b000.00005617c86ad000.rw-.sdmp	Binary or memory string: /etc/qemu-binfmt/arm
Source: t6.elf, 5430.1.00007ffead268000.00007ffead289000.rw-.sdmp	Binary or memory string: /usr/bin/qemu-arm
Source: t6.elf, 5430.1.00005617c855b000.00005617c86ad000.rw-.sdmp	Binary or memory string: V!/etc/qemu-binfmt/arm
Source: t6.elf, 5430.1.00007ffead268000.00007ffead289000.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	Acquire Infrastructure	Valid Accounts	Windows Management Instrumentation	Path Interception	Path Interception	Direct Volume Access	1 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

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
t6.elf	29%	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	162.213.35.24	true	false		high

URLs from Memory and Binaries

Name	Source	Malicious	Reputation
http://1/wget.sh	t6.elf, 5430.1.00007fa3e4035000.00007fa3e403a000.rw-.sdmp	false	high
http://schemas.xmlsoap.org/soap/encoding/	t6.elf, 5430.1.00007fa3e4035000.00007fa3e403a000.rw-.sdmp	false	high
http://9/curl.sh	t6.elf, 5430.1.00007fa3e4035000.00007fa3e403a000.rw-.sdmp	false	high
http://schemas.xmlsoap.org/soap/envelope/	t6.elf, 5430.1.00007fa3e4035000.00007fa3e403a000.rw-.sdmp	false	high

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	t5.elf	Get hash	malicious	Unknown	Browse	162.213.35.24
	byte.arm6.elf	Get hash	malicious	Mirai, Okiru	Browse	162.213.35.25
	byte.arm5.elf	Get hash	malicious	Mirai, Okiru	Browse	162.213.35.24
	byte.mpsl.elf	Get hash	malicious	Mirai, Okiru	Browse	162.213.35.24
	byte.sh4.elf	Get hash	malicious	Mirai, Okiru	Browse	162.213.35.24
	byte.ppc.elf	Get hash	malicious	Mirai, Okiru	Browse	162.213.35.25
	sshd.elf	Get hash	malicious	Unknown	Browse	162.213.35.25
	byte.spc.elf	Get hash	malicious	Mirai, Okiru	Browse	162.213.35.25
	byte.m68k.elf	Get hash	malicious	Mirai, Okiru	Browse	162.213.35.25
	m68k.elf	Get hash	malicious	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, EABI4 version 1 (SYSV), statically linked, stripped
Entropy (8bit):	6.11377239126389
TrID:	ELF Executable and Linkable format (generic) (4004/1) 100.00%
File name:	t6.elf
File size:	89'656 bytes
MD5:	a848a60e516279d77ae9dcfe62968008
SHA1:	5600ff20bd392a9997079e20290ea4d8f9378291
SHA256:	ddf238bae27051a009f14c272850191202bbd0f8f8ca38c95282ee594a9fc63b
SHA512:	f882d646d8579ffc7fe60620a66f142e9e06c8021a319646e236373d3a0a7f0b7eddb72a8dd5158e119a5a8afce32548ca46f7188400f68feadeca2bd3efc896
SSDEEP:	1536:EunmUYxnVvI1l1c0qJodseVhYIXqhoUcFZlltDipqWUlMpntIZgTeg:IaA0coJhYIXqhaIqWU2ptJT
TLSH:	AE93095AFD819B41C4D515BBBE1E529E33076BA8E3EA3213DC241B25338AA1F0F77506
File Content Preview:	.ELF..............(.........4....[......4. ...(........p.U..........................................(V..(V..............(V..(V..(V......L9..............,V..,V..,V..................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:	89016
Section Header Size:	40
Number of Section Headers:	16
Header String Table Index:	15

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	0x13b8c	0x0	0x6	AX	0	16
.fini	PROGBITS	0x1bc7c	0x13c7c	0x10	0x0	0x6	AX	0	4
.rodata	PROGBITS	0x1bc8c	0x13c8c	0x186c	0x0	0x2	A	0	4
.ARM.extab	PROGBITS	0x1d4f8	0x154f8	0x18	0x0	0x2	A	0	4
.ARM.exidx	ARM_EXIDX	0x1d510	0x15510	0x118	0x0	0x82	AL	2	4
.eh_frame	PROGBITS	0x25628	0x15628	0x4	0x0	0x3	WA	0	4
.tbss	NOBITS	0x2562c	0x1562c	0x8	0x0	0x403	WAT	0	4
.init_array	INIT_ARRAY	0x2562c	0x1562c	0x4	0x0	0x3	WA	0	4
.fini_array	FINI_ARRAY	0x25630	0x15630	0x4	0x0	0x3	WA	0	4
.got	PROGBITS	0x25638	0x15638	0xa8	0x4	0x3	WA	0	4
.data	PROGBITS	0x256e0	0x156e0	0x43c	0x0	0x3	WA	0	4
.bss	NOBITS	0x25b1c	0x15b1c	0x3458	0x0	0x3	WA	0	4
.ARM.attributes	ARM_ATTRIBUTES	0x0	0x15b1c	0x16	0x0	0x0		0	1
.shstrtab	STRTAB	0x0	0x15b32	0x83	0x0	0x0		0	1

Program Segments

Type	Offset	Virtual Address	Physical Address	File Size	Memory Size	Entropy	Flags	Flags Description	Align	Section Mappings
EXIDX	0x15510	0x1d510	0x1d510	0x118	0x118	4.4728	0x4	R	0x4	.ARM.exidx
LOAD	0x0	0x8000	0x8000	0x15628	0x15628	6.1063	0x5	R E	0x8000	.init .text .fini .rodata .ARM.extab .ARM.exidx
LOAD	0x15628	0x25628	0x25628	0x4f4	0x394c	6.1999	0x6	RW	0x8000	.eh_frame .tbss .init_array .fini_array .got .data .bss
TLS	0x1562c	0x2562c	0x2562c	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

UDP Packets

Timestamp	Source Port	Dest Port	Source IP	Dest IP
Jan 13, 2025 06:57:01.546346903 CET	35260	53	192.168.2.13	8.8.8.8
Jan 13, 2025 06:57:01.546382904 CET	37412	53	192.168.2.13	8.8.8.8
Jan 13, 2025 06:57:01.552756071 CET	53	37412	8.8.8.8	192.168.2.13
Jan 13, 2025 06:57:01.553162098 CET	53	35260	8.8.8.8	192.168.2.13

DNS Queries

Timestamp	Source IP	Dest IP	Trans ID	OP Code	Name	Type	Class	DNS over HTTPS
Jan 13, 2025 06:57:01.546346903 CET	192.168.2.13	8.8.8.8	0x150f	Standard query (0)	daisy.ubuntu.com	A (IP address)	IN (0x0001)	false
Jan 13, 2025 06:57:01.546382904 CET	192.168.2.13	8.8.8.8	0x3ff	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
Jan 13, 2025 06:57:01.553162098 CET	8.8.8.8	192.168.2.13	0x150f	No error (0)	daisy.ubuntu.com		162.213.35.24	A (IP address)	IN (0x0001)	false
Jan 13, 2025 06:57:01.553162098 CET	8.8.8.8	192.168.2.13	0x150f	No error (0)	daisy.ubuntu.com		162.213.35.25	A (IP address)	IN (0x0001)	false

System Behavior

Analysis Process: t6.elf PID: 5430, Parent PID: 5352

General

Start time (UTC):	05:56:56
Start date (UTC):	13/01/2025
Path:	/tmp/t6.elf
Arguments:	/tmp/t6.elf
File size:	4956856 bytes
MD5 hash:	5ebfcae4fe2471fcc5695c2394773ff1

Description:	Adversaries may attempt to dump credentials to obtain account login and credential material, normally in the form of a hash or a clear text password, from the operating system and software. Credentials can then be used to perform Lateral Movement and access restricted information.
Tactics:	Credential Access
Data Sources:	Active Directory: Active Directory Object Access, Command: Command Execution, File: File Access, Network Traffic: Network Traffic Content, Network Traffic: Network Traffic Flow, Process: OS API Execution, Process: Process Access, Process: Process Creation, Windows Registry: Windows Registry Key Access
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 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 t6.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

Persistence and Installation Behavior

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

URLs from Memory and Binaries

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: t6.elf PID: 5430, Parent PID: 5352

General

Chronological Activities

Linux Analysis Report
t6.elf