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Linux Analysis Report
arm6.elf

Overview

General Information

Sample name:	arm6.elf
Analysis ID:	1544041
MD5:	f64be83f8826671ee77ced3a3e5ff28a
SHA1:	e1b7c11ecba5e437ed97f1d131257686232df72b
SHA256:	89530ec22331646332cb08eac2197872d97f8dc234372f4f4ba96f38ded26d89
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

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:	1544041
Start date and time:	2024-10-28 18:38:06 +01:00
Joe Sandbox product:	CloudBasic
Overall analysis duration:	0h 4m 27s
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:	mal48.linELF@0/0@0/0

Warnings

VT rate limit hit for: arm6.elf

Runtime Messages

Command:	/tmp/arm6.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

arm6.elf (PID: 6221, Parent: 6135, MD5: 5ebfcae4fe2471fcc5695c2394773ff1) Arguments: /tmp/arm6.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: arm6.elf

ReversingLabs: Detection: 18%

Source: arm6.elf	String: ash\|login\|wget\|curl\|tftp\|ntpdate\|ftp
Source: arm6.elf	String: /proc//exe\|ash\|login\|wget\|curl\|tftp\|ntpdate\|ftp/lib//lib64//mountinfo

Source: /tmp/arm6.elf (PID: 6221)

Socket: 127.0.0.1:1234

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.linELF@0/0@0/0

Source: /tmp/arm6.elf (PID: 6221)	File opened: /proc/11/maps	Jump to behavior
Source: /tmp/arm6.elf (PID: 6221)	File opened: /proc/22/maps	Jump to behavior
Source: /tmp/arm6.elf (PID: 6221)	File opened: /proc/66/maps	Jump to behavior
Source: /tmp/arm6.elf (PID: 6221)	File opened: /proc/99/maps	Jump to behavior
Source: /tmp/arm6.elf (PID: 6221)	File opened: /proc/111/maps	Jump to behavior
Source: /tmp/arm6.elf (PID: 6221)	File opened: /proc/222/maps	Jump to behavior
Source: /tmp/arm6.elf (PID: 6221)	File opened: /proc/333/maps	Jump to behavior
Source: /tmp/arm6.elf (PID: 6221)	File opened: /proc/777/maps	Jump to behavior

Source: /tmp/arm6.elf (PID: 6221)

Queries kernel information via 'uname':

Jump to behavior

Source: arm6.elf, 6221.1.000056476c931000.000056476ca80000.rw-.sdmp	Binary or memory string: /etc/qemu-binfmt/arm
Source: arm6.elf, 6221.1.00007ffe32b20000.00007ffe32b41000.rw-.sdmp	Binary or memory string: /usr/bin/qemu-arm
Source: arm6.elf, 6221.1.00007ffe32b20000.00007ffe32b41000.rw-.sdmp	Binary or memory string: x86_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, 6221.1.00007ffe32b20000.00007ffe32b41000.rw-.sdmp	Binary or memory string: qemu: uncaught target signal 11 (Segmentation fault) - core dumped
Source: arm6.elf, 6221.1.000056476c931000.000056476ca80000.rw-.sdmp	Binary or memory string: lGV!/etc/qemu-binfmt/arm

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	1 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
arm6.elf	18%	ReversingLabs	Linux.Backdoor.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	spc.elf	Get hash	malicious	Unknown	Browse
	sshd.elf	Get hash	malicious	Unknown	Browse
	bot.arm5.elf	Get hash	malicious	Mirai, Gafgyt, Okiru	Browse
	bot.mpsl.elf	Get hash	malicious	Mirai, Gafgyt, Okiru	Browse
	bot.arm7.elf	Get hash	malicious	Mirai, Okiru	Browse
	bot.x86_64.elf	Get hash	malicious	Mirai, Gafgyt, Okiru	Browse
	main_ppc.elf	Get hash	malicious	Mirai	Browse
	main_sh4.elf	Get hash	malicious	Mirai	Browse
	.i.elf	Get hash	malicious	Unknown	Browse
	sshd.elf	Get hash	malicious	Unknown	Browse
91.189.91.42	spc.elf	Get hash	malicious	Unknown	Browse
	sshd.elf	Get hash	malicious	Unknown	Browse
	bot.arm5.elf	Get hash	malicious	Mirai, Gafgyt, Okiru	Browse
	bot.arm5.elf	Get hash	malicious	Mirai, Gafgyt, Okiru	Browse
	bot.mpsl.elf	Get hash	malicious	Mirai, Gafgyt, Okiru	Browse
	bot.arm7.elf	Get hash	malicious	Mirai, Okiru	Browse
	main_arm7.elf	Get hash	malicious	Mirai	Browse
	bot.x86_64.elf	Get hash	malicious	Mirai, Gafgyt, Okiru	Browse
	main_ppc.elf	Get hash	malicious	Mirai	Browse
	main_sh4.elf	Get hash	malicious	Mirai	Browse

Domains

⊘No context

ASNs

Match	Associated Sample Name / URL	SHA 256	Detection	Threat Name	Link	Context
CANONICAL-ASGB	spc.elf	Get hash	malicious	Unknown	Browse	91.189.91.42
	m68k.elf	Get hash	malicious	Unknown	Browse	185.125.190.26
	sshd.elf	Get hash	malicious	Unknown	Browse	91.189.91.42
	bot.arm5.elf	Get hash	malicious	Mirai, Gafgyt, Okiru	Browse	91.189.91.42
	bot.arm5.elf	Get hash	malicious	Mirai, Gafgyt, Okiru	Browse	91.189.91.42
	bot.mpsl.elf	Get hash	malicious	Mirai, Gafgyt, Okiru	Browse	91.189.91.42
	bot.arm7.elf	Get hash	malicious	Mirai, Okiru	Browse	91.189.91.42
	main_arm7.elf	Get hash	malicious	Mirai	Browse	91.189.91.42
	bot.x86_64.elf	Get hash	malicious	Mirai, Gafgyt, Okiru	Browse	91.189.91.42
	main_ppc.elf	Get hash	malicious	Mirai	Browse	91.189.91.42
CANONICAL-ASGB	spc.elf	Get hash	malicious	Unknown	Browse	91.189.91.42
	m68k.elf	Get hash	malicious	Unknown	Browse	185.125.190.26
	sshd.elf	Get hash	malicious	Unknown	Browse	91.189.91.42
	bot.arm5.elf	Get hash	malicious	Mirai, Gafgyt, Okiru	Browse	91.189.91.42
	bot.arm5.elf	Get hash	malicious	Mirai, Gafgyt, Okiru	Browse	91.189.91.42
	bot.mpsl.elf	Get hash	malicious	Mirai, Gafgyt, Okiru	Browse	91.189.91.42
	bot.arm7.elf	Get hash	malicious	Mirai, Okiru	Browse	91.189.91.42
	main_arm7.elf	Get hash	malicious	Mirai	Browse	91.189.91.42
	bot.x86_64.elf	Get hash	malicious	Mirai, Gafgyt, Okiru	Browse	91.189.91.42
	main_ppc.elf	Get hash	malicious	Mirai	Browse	91.189.91.42
INIT7CH	spc.elf	Get hash	malicious	Unknown	Browse	109.202.202.202
	sshd.elf	Get hash	malicious	Unknown	Browse	109.202.202.202
	bot.arm5.elf	Get hash	malicious	Mirai, Gafgyt, Okiru	Browse	109.202.202.202
	bot.arm5.elf	Get hash	malicious	Mirai, Gafgyt, Okiru	Browse	109.202.202.202
	bot.mpsl.elf	Get hash	malicious	Mirai, Gafgyt, Okiru	Browse	109.202.202.202
	bot.arm7.elf	Get hash	malicious	Mirai, Okiru	Browse	109.202.202.202
	main_arm7.elf	Get hash	malicious	Mirai	Browse	109.202.202.202
	bot.x86_64.elf	Get hash	malicious	Mirai, Gafgyt, Okiru	Browse	109.202.202.202
	main_ppc.elf	Get hash	malicious	Mirai	Browse	109.202.202.202
	main_sh4.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 LSB executable, ARM, EABI4 version 1 (SYSV), statically linked, stripped
Entropy (8bit):	5.960942438270223
TrID:	ELF Executable and Linkable format (generic) (4004/1) 100.00%
File name:	arm6.elf
File size:	72'816 bytes
MD5:	f64be83f8826671ee77ced3a3e5ff28a
SHA1:	e1b7c11ecba5e437ed97f1d131257686232df72b
SHA256:	89530ec22331646332cb08eac2197872d97f8dc234372f4f4ba96f38ded26d89
SHA512:	3d7c198e543f055166b9f992ff54dd3aef6c2595e7273556a6701e748b4c6b74fc47f49aaec6976277ba76c2893bdff33772edd05222e5d4575ab18e4bc30537
SSDEEP:	1536:afn1tS18Ba1tdvkz8tS3NoAl1FoN+ze/Dabijfq7t9ek:UtS18Ba1thkzPNoAl1Folfq7t9ek
TLSH:	F763085AB8828E15C5C406BEFE0E518E332377A8E3DFB213DD145F2167CA56B0A7B452
File Content Preview:	.ELF..............(.....T...4...........4. ...(.....................$...$...............$...$...$.......Di..........Q.td..................................-...L..................@-.,@...0....S..... 0....S.........../..0...0...@..../.8.......$.....-.@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:	72336
Section Header Size:	40
Number of Section Headers:	12
Header String Table Index:	11

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	0x10394	0x0	0x6	AX	16
.fini	PROGBITS	0x18444	0x10444	0x10	0x0	0x6	AX	4
.rodata	PROGBITS	0x18454	0x10454	0x11d0	0x0	0x2	A	4
.eh_frame	PROGBITS	0x21624	0x11624	0x4	0x0	0x3	WA	4
.init_array	INIT_ARRAY	0x21628	0x11628	0x4	0x0	0x3	WA	4
.fini_array	FINI_ARRAY	0x2162c	0x1162c	0x4	0x0	0x3	WA	4
.got	PROGBITS	0x21634	0x11634	0x74	0x4	0x3	WA	4
.data	PROGBITS	0x216a8	0x116a8	0x390	0x0	0x3	WA	4
.bss	NOBITS	0x21a38	0x11a38	0x6530	0x0	0x3	WA	4
.shstrtab	STRTAB	0x0	0x11a38	0x57	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	0x11624	0x11624	5.9799	0x5	R E	0x8000	.init .text .fini .rodata
LOAD	0x11624	0x21624	0x21624	0x414	0x6944	4.1667	0x6	RW	0x8000	.eh_frame .init_array .fini_array .got .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
Oct 28, 2024 18:38:48.894315004 CET	43928	443	192.168.2.23	91.189.91.42
Oct 28, 2024 18:38:54.525476933 CET	42836	443	192.168.2.23	91.189.91.43
Oct 28, 2024 18:38:55.293402910 CET	42516	80	192.168.2.23	109.202.202.202
Oct 28, 2024 18:39:09.883516073 CET	43928	443	192.168.2.23	91.189.91.42
Oct 28, 2024 18:39:20.122013092 CET	42836	443	192.168.2.23	91.189.91.43
Oct 28, 2024 18:39:26.265223026 CET	42516	80	192.168.2.23	109.202.202.202
Oct 28, 2024 18:39:50.837790012 CET	43928	443	192.168.2.23	91.189.91.42
Oct 28, 2024 18:40:11.314953089 CET	42836	443	192.168.2.23	91.189.91.43

System Behavior

Analysis Process: arm6.elf PID: 6221, Parent PID: 6135

General

Start time (UTC):	17:38:49
Start date (UTC):	28/10/2024
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 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 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 arm6.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

Persistence and Installation Behavior

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: arm6.elf PID: 6221, Parent PID: 6135

General

Chronological Activities

Linux Analysis Report
arm6.elf