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Linux Analysis Report
arm6.elf

Overview

General Information

Sample name:	arm6.elf
Analysis ID:	1581639
MD5:	1b62a107b3113346e397369c5e95d909
SHA1:	50e6672dc4f68dae849e3ed405fe237c6c648b01
SHA256:	f779cf1f5f8176d19bb7b1229aeafa7d3ad53affce695886599b6c99e0e28644
Tags:	elfuser-abuse_ch
Infos:

Detection

Gafgyt

Score:	56
Range:	0 - 100
Whitelisted:	false

Signatures

Multi AV Scanner detection for submitted file

Yara detected Gafgyt

Found strings indicative of a multi-platform dropper

Sample contains strings indicative of BusyBox which embeds multiple Unix commands in a single executable

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:	1581639
Start date and time:	2024-12-28 11:06:15 +01:00
Joe Sandbox product:	CloudBasic
Overall analysis duration:	0h 4m 14s
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:	arm6.elf
Detection:	MAL
Classification:	mal56.troj.linELF@0/0@2/0

Runtime Messages

Command:	/tmp/arm6.elf
PID:	5525
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

arm6.elf (PID: 5525, Parent: 5448, MD5: 5ebfcae4fe2471fcc5695c2394773ff1) Arguments: /tmp/arm6.elf

cleanup

Malware Threat Intel

Provided by

Name	Description	Attribution	Blogpost URLs	Link
Bashlite, Gafgyt	Bashlite is a malware family which infects Linux systems in order to launch distributed denial-of-service attacks (DDoS). Originally it was also known under the name Bashdoor, but this term now refers to the exploit method used by the malware. It has been used to launch attacks of up to 400 Gbps.	No Attribution	http://blog.trendmicro.com/trendlabs-security-intelligence/bashlite-affects-devices-running-on-busybox/ https://blog.cyber5w.com/gafgyt-backdoor-analysis https://blog.netlab.360.com/gafgtyt_tor-and-necro-are-on-the-move-again/ https://blog.netlab.360.com/public-cloud-threat-intelligence-202203/ https://blog.netlab.360.com/some_details_of_the_ddos_attacks_targeting_ukraine_and_russia_in_recent_days/	https://malpedia.caad.fkie.fraunhofer.de/details/elf.bashlite

Yara Signatures

Initial Sample

Source	Rule	Description	Author	Strings
arm6.elf	JoeSecurity_Gafgyt	Yara detected Gafgyt	Joe Security

Memory Dumps

Source	Rule	Description	Author	Strings
5525.1.00007f3fe8017000.00007f3fe803c000.r-x.sdmp	JoeSecurity_Gafgyt	Yara detected Gafgyt	Joe Security

Joe Sandbox Signatures

Click to jump to signature section

Show All Signature Results

AV Detection

Multi AV Scanner detection for submitted file

Source: arm6.elf

ReversingLabs: Detection: 36%

Source: arm6.elf

String: %xKilled process: Path: wgetcurltftprebootsocketproc/lib/systemd//usr/lib/systemd/system/system/bin//gm/bin//mnt//home/process//home/helper/home/davinci/z/bin//mnt/mtd//tmp/sqfs//usr/libexec//usr/sbin//z/zbin//usr/bin/bin/setsockoptbindlisten1.1.1.1hi im here, i think/bin/busybox iptables -A INPUT -p tcp --dport 26721 -j ACCEPT/usr/bin/iptables -A INPUT -p tcp --dport 26721 -j ACCEPTbusybox iptables -A INPUT -p tcp --dport 26721 -j ACCEPTbindtoipconnectpoll/proc/net/tcp/proc//exe/fd0

Source: unknown	UDP traffic detected without corresponding DNS query: 1.1.1.1
Source: unknown	UDP traffic detected without corresponding DNS query: 1.1.1.1

Source: global traffic

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

Source: Initial sample	String containing 'busybox' found: /bin/busybox iptables -A INPUT -p tcp --dport 26721 -j ACCEPT
Source: Initial sample	String containing 'busybox' found: busybox iptables -A INPUT -p tcp --dport 26721 -j ACCEPT
Source: Initial sample	String containing 'busybox' found: %xKilled process: Path: wgetcurltftprebootsocketproc/lib/systemd//usr/lib/systemd/system/system/bin//gm/bin//mnt//home/process//home/helper/home/davinci/z/bin//mnt/mtd//tmp/sqfs//usr/libexec//usr/sbin//z/zbin//usr/bin/bin/setsockoptbindlisten1.1.1.1hi im here, i think/bin/busybox iptables -A INPUT -p tcp --dport 26721 -j ACCEPT/usr/bin/iptables -A INPUT -p tcp --dport 26721 -j ACCEPTbusybox iptables -A INPUT -p tcp --dport 26721 -j ACCEPTbindtoipconnectpoll/proc/net/tcp/proc//exe/fd0

Source: ELF static info symbol of initial sample

.symtab present: no

Source: classification engine

Classification label: mal56.troj.linELF@0/0@2/0

Source: /tmp/arm6.elf (PID: 5525)

Queries kernel information via 'uname':

Jump to behavior

Source: arm6.elf, 5525.1.00007ffe16941000.00007ffe16962000.rw-.sdmp	Binary or memory string: Wx86_64/usr/bin/qemu-arm/tmp/arm6.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/arm6.elf
Source: arm6.elf, 5525.1.0000564be4511000.0000564be463f000.rw-.sdmp	Binary or memory string: KV!/etc/qemu-binfmt/arm
Source: arm6.elf, 5525.1.0000564be4511000.0000564be463f000.rw-.sdmp	Binary or memory string: /etc/qemu-binfmt/arm
Source: arm6.elf, 5525.1.00007ffe16941000.00007ffe16962000.rw-.sdmp	Binary or memory string: /usr/bin/qemu-arm
Source: arm6.elf, 5525.1.00007ffe16941000.00007ffe16962000.rw-.sdmp	Binary or memory string: qemu: uncaught target signal 11 (Segmentation fault) - core dumped

Stealing of Sensitive Information

Yara detected Gafgyt

Source: Yara match	File source: arm6.elf, type: SAMPLE
Source: Yara match	File source: 5525.1.00007f3fe8017000.00007f3fe803c000.r-x.sdmp, type: MEMORY

Remote Access Functionality

Yara detected Gafgyt

Source: Yara match	File source: arm6.elf, type: SAMPLE
Source: Yara match	File source: 5525.1.00007f3fe8017000.00007f3fe803c000.r-x.sdmp, type: MEMORY

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 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

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Legend:

Process
Signature
Created File
DNS/IP Info
Is Dropped
Number of created Files
Is malicious
Internet

Source	Detection	Scanner	Label	Link
arm6.elf	37%	ReversingLabs	Linux.Backdoor.Mirai

Name	IP	Active	Malicious	Antivirus Detection	Reputation
daisy.ubuntu.com	162.213.35.24	true	false		high

Match	Associated Sample Name / URL	SHA 256	Detection	Threat Name	Link	Context
daisy.ubuntu.com	45.200.149.186-boatnet.arm-2024-12-28T01_23_00.elf	Get hash	malicious	Mirai	Browse	162.213.35.24
	byte.x86.elf	Get hash	malicious	Mirai, Okiru	Browse	162.213.35.25
	byte.ppc.elf	Get hash	malicious	Mirai, Okiru	Browse	162.213.35.24
	109.176.30.237-boatnet.mpsl-2024-12-27T20_20_43.elf	Get hash	malicious	Mirai	Browse	162.213.35.24
	byte.mpsl.elf	Get hash	malicious	Mirai, Okiru	Browse	162.213.35.25
	byte.mpsl.elf	Get hash	malicious	Mirai, Okiru	Browse	162.213.35.25
	byte.ppc.elf	Get hash	malicious	Mirai, Okiru	Browse	162.213.35.25
	llklllklld.x86.elf	Get hash	malicious	Mirai, Okiru	Browse	162.213.35.25
	RpcSecurity.arm6.elf	Get hash	malicious	Unknown	Browse	162.213.35.24
	x86_64.nn.elf	Get hash	malicious	Okiru	Browse	162.213.35.24

File type:	ELF 32-bit LSB executable, ARM, EABI4 version 1 (SYSV), statically linked, stripped
Entropy (8bit):	5.687571255435797
TrID:	ELF Executable and Linkable format (generic) (4004/1) 100.00%
File name:	arm6.elf
File size:	167'164 bytes
MD5:	1b62a107b3113346e397369c5e95d909
SHA1:	50e6672dc4f68dae849e3ed405fe237c6c648b01
SHA256:	f779cf1f5f8176d19bb7b1229aeafa7d3ad53affce695886599b6c99e0e28644
SHA512:	2e884676bf4e5cf3717e18086aa2b881ad33f3e1f36443fbf64edb1b1a6e40668974d88ee346bd7085acffcb101be34ecadff8430d75f922b8ff4ac9b521760b
SSDEEP:	3072:LvF9Cf5NicNAgjKAaPfxtajntX06y9Zc4dzQ9sY09lJg:DFQf3duvfXahX0lcsuv0hg
TLSH:	A5F30946F8819B15D5D255BAFF0E128E33231B78E3DE72039D246F347B8A86B0E3A515
File Content Preview:	.ELF..............(.....T...4...........4. ...(......................A...A...............A...A...A...H..............Q.td..................................-...L..................@-.,@...0....S..... 0....S.........../..0...0...@..../.x........A....-.@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:	0x8154
Flags:	0x4000002
ELF Header Size:	52
Program Header Offset:	52
Program Header Size:	32
Number of Program Headers:	3
Section Header Offset:	166644
Section Header Size:	40
Number of Section Headers:	13
Header String Table Index:	12

Sections

Name	Type	Address	Offset	Size	EntSize	Flags	Flags Description	Align
	NULL	0x0	0x0	0x0	0x0	0x0		0
.init	PROGBITS	0x8094	0x94	0x10	0x0	0x6	AX	4
.text	PROGBITS	0x80b0	0xb0	0x21bd0	0x0	0x6	AX	16
.fini	PROGBITS	0x29c80	0x21c80	0x10	0x0	0x6	AX	4
.rodata	PROGBITS	0x29c90	0x21c90	0x2540	0x0	0x2	A	8
.init_array	INIT_ARRAY	0x341d4	0x241d8	0x8	0x0	0x3	WA	4
.fini_array	FINI_ARRAY	0x341dc	0x241e0	0x4	0x0	0x3	WA	4
.data.rel.ro	PROGBITS	0x341e4	0x241e8	0x78	0x0	0x3	WA	4
.got	PROGBITS	0x3425c	0x24260	0x11c	0x4	0x3	WA	4
.data	PROGBITS	0x34380	0x24384	0x46f4	0x0	0x3	WA	32
.bss	NOBITS	0x38a78	0x28a78	0x495c	0x0	0x3	WA	8
.ARM.attributes	ARM_ATTRIBUTES	0x0	0x28a78	0x10	0x0	0x0		1
.shstrtab	STRTAB	0x0	0x28a88	0x6a	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	0x241d0	0x241d0	6.0871	0x5	R E	0x8000	.init .text .fini .rodata
LOAD	0x241d4	0x341d4	0x341d0	0x48a4	0x9200	0.5386	0x6	RW	0x8000	.init_array .fini_array .data.rel.ro .got .data .bss
GNU_STACK	0x0	0x0	0x0	0x0	0x0	0.0000	0x7	RWE	0x4

Timestamp	Source Port	Dest Port	Source IP	Dest IP
Dec 28, 2024 11:06:57.550647020 CET	50431	53	192.168.2.15	1.1.1.1
Dec 28, 2024 11:06:57.550647020 CET	54119	53	192.168.2.15	1.1.1.1
Dec 28, 2024 11:06:58.035583019 CET	53	54119	1.1.1.1	192.168.2.15
Dec 28, 2024 11:06:58.124233007 CET	53	50431	1.1.1.1	192.168.2.15

DNS Queries

Timestamp	Source IP	Dest IP	Trans ID	OP Code	Name	Type	Class	DNS over HTTPS
Dec 28, 2024 11:06:57.550647020 CET	192.168.2.15	1.1.1.1	0x6e57	Standard query (0)	daisy.ubuntu.com	A (IP address)	IN (0x0001)	false
Dec 28, 2024 11:06:57.550647020 CET	192.168.2.15	1.1.1.1	0x886f	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
Dec 28, 2024 11:06:58.124233007 CET	1.1.1.1	192.168.2.15	0x6e57	No error (0)	daisy.ubuntu.com		162.213.35.24	A (IP address)	IN (0x0001)	false
Dec 28, 2024 11:06:58.124233007 CET	1.1.1.1	192.168.2.15	0x6e57	No error (0)	daisy.ubuntu.com		162.213.35.25	A (IP address)	IN (0x0001)	false

System Behavior

Analysis Process: arm6.elf PID: 5525, Parent PID: 5448

General

Start time (UTC):	10:06:56
Start date (UTC):	28/12/2024
Path:	/tmp/arm6.elf
Arguments:	/tmp/arm6.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 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

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Linux Analysis Report arm6.elf

Overview

General Information

Detection

Signatures

Classification

General Information

Runtime Messages

Process Tree

Malware Threat Intel

Yara Signatures

Initial Sample

Memory Dumps

Suricata Signatures

Joe Sandbox Signatures

AV Detection

Spreading

Networking

System Summary

Malware Analysis System Evasion

Stealing of Sensitive Information

Remote Access Functionality

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

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: arm6.elf PID: 5525, Parent PID: 5448

General

Chronological Activities

Linux Analysis Report
arm6.elf