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Linux Analysis Report
na.elf

Overview

General Information

Sample name:	na.elf
Analysis ID:	1527076
MD5:	052d1bf7b8ef1a73b58dcdfb03d84f8c
SHA1:	c52c5df9751629287e08a86e00758524b2019ce7
SHA256:	10beaa2b231f08836935954b4397a03d895c7c239ba17fd9d119446027c113a6
Tags:	elfuser-abuse_ch
Infos:

Detection

Score:	48
Range:	0 - 100
Whitelisted:	false

Signatures

Multi AV Scanner detection for submitted file

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:	1527076
Start date and time:	2024-10-06 20:43:07 +02:00
Joe Sandbox product:	CloudBasic
Overall analysis duration:	0h 4m 31s
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:	na.elf
Detection:	MAL
Classification:	mal48.linELF@0/0@0/0

Warnings

VT rate limit hit for: na.elf

Runtime Messages

Command:	/tmp/na.elf
PID:	5457
Exit Code:	1
Exit Code Info:
Killed:	False
Standard Output:
Standard Error:

Process Tree

system is lnxubuntu20

na.elf (PID: 5457, Parent: 5375, MD5: 8943e5f8f8c280467b4472c15ae93ba9) Arguments: /tmp/na.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: na.elf

ReversingLabs: Detection: 50%

Source: global traffic

TCP traffic: 192.168.2.13:48202 -> 185.125.190.26:443

Source: unknown	TCP traffic detected without corresponding DNS query: 185.125.190.26
Source: unknown	TCP traffic detected without corresponding DNS query: 185.125.190.26

Source: unknown

Network traffic detected: HTTP traffic on port 48202 -> 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/na.elf (PID: 5457)

Queries kernel information via 'uname':

Jump to behavior

Source: na.elf, 5457.1.00007ffea8825000.00007ffea8846000.rw-.sdmp	Binary or memory string: x86_64/usr/bin/qemu-sh4/tmp/na.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/na.elf
Source: na.elf, 5457.1.00007ffea8825000.00007ffea8846000.rw-.sdmp	Binary or memory string: /usr/bin/qemu-sh4
Source: na.elf, 5457.1.000055c10c4ef000.000055c10c552000.rw-.sdmp	Binary or memory string: U5!/etc/qemu-binfmt/sh4
Source: na.elf, 5457.1.000055c10c4ef000.000055c10c552000.rw-.sdmp	Binary or memory string: /etc/qemu-binfmt/sh4

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	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
na.elf	50%	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	Flag	ASN	ASN Name	Malicious
185.125.190.26	unknown	United Kingdom		41231	CANONICAL-ASGB	false

Joe Sandbox View / Context

IPs

Match	Associated Sample Name / URL	SHA 256	Detection	Threat Name	Link
185.125.190.26	na.elf	Get hash	malicious	Unknown	Browse
	na.elf	Get hash	malicious	Mirai, Moobot	Browse
	na.elf	Get hash	malicious	Unknown	Browse
	arm7.elf	Get hash	malicious	Mirai	Browse
	cayo.arm7.elf	Get hash	malicious	Gafgyt, Mirai	Browse
	SecuriteInfo.com.Linux.Siggen.9999.5706.5318.elf	Get hash	malicious	Mirai	Browse
	roze.mipsel.elf	Get hash	malicious	Gafgyt, Mirai	Browse
	cayo.i686.elf	Get hash	malicious	Mirai, Gafgyt	Browse
	i586.elf	Get hash	malicious	Unknown	Browse
	i686.elf	Get hash	malicious	Gafgyt, Mirai	Browse

Domains

⊘No context

ASNs

Match	Associated Sample Name / URL	SHA 256	Detection	Threat Name	Link	Context
CANONICAL-ASGB	na.elf	Get hash	malicious	Unknown	Browse	91.189.91.42
	na.elf	Get hash	malicious	Unknown	Browse	185.125.190.26
	na.elf	Get hash	malicious	Unknown	Browse	91.189.91.42
	na.elf	Get hash	malicious	Unknown	Browse	91.189.91.42
	na.elf	Get hash	malicious	Unknown	Browse	91.189.91.42
	na.elf	Get hash	malicious	Mirai, Moobot	Browse	185.125.190.26
	na.elf	Get hash	malicious	Unknown	Browse	91.189.91.42
	na.elf	Get hash	malicious	Unknown	Browse	185.125.190.26
	na.elf	Get hash	malicious	Unknown	Browse	91.189.91.42
	na.elf	Get hash	malicious	Unknown	Browse	91.189.91.42

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, Renesas SH, version 1 (SYSV), statically linked, stripped
Entropy (8bit):	6.855432656966003
TrID:	ELF Executable and Linkable format (generic) (4004/1) 100.00%
File name:	na.elf
File size:	60'340 bytes
MD5:	052d1bf7b8ef1a73b58dcdfb03d84f8c
SHA1:	c52c5df9751629287e08a86e00758524b2019ce7
SHA256:	10beaa2b231f08836935954b4397a03d895c7c239ba17fd9d119446027c113a6
SHA512:	9a21f9198c1c1dec5dce31e2b0fa8e2c0478982845158c510c3184286e278595c1930a55478f6d1da52b89e3efe032de84c6d0b8ef2bbacc078801e133c90c09
SSDEEP:	1536:UKOiF4l713+bEhK5bq7j3Hm+FXVGjJCYZld:rOie13+wo58m+FXVGjJjd
TLSH:	00439E77C83AAD84C44546B4B8319EF41F53F40482AB5EFB5A99C67A8083DACF6063F5
File Content Preview:	.ELF.....................@.4...$.......4. ...(...............@...@...........................A...A.4...@&..........Q.td............................././"O.n........#.@........#.*@l....o&O.n...l..............................././.../.a"O.!...n...a.b("...q.

Static ELF Info

ELF header
Class:	ELF32
Data:	2's complement, little endian
Version:	1 (current)
Machine:	<unknown>
Version Number:	0x1
Type:	EXEC (Executable file)
OS/ABI:	UNIX - System V
ABI Version:	0
Entry Point Address:	0x4001a0
Flags:	0x9
ELF Header Size:	52
Program Header Offset:	52
Program Header Size:	32
Number of Program Headers:	3
Section Header Offset:	59940
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	0x400094	0x94	0x30	0x0	0x6	AX	4
.text	PROGBITS	0x4000e0	0xe0	0xcd80	0x0	0x6	AX	32
.fini	PROGBITS	0x40ce60	0xce60	0x24	0x0	0x6	AX	4
.rodata	PROGBITS	0x40ce84	0xce84	0x1728	0x0	0x2	A	4
.ctors	PROGBITS	0x41e5b0	0xe5b0	0x8	0x0	0x3	WA	4
.dtors	PROGBITS	0x41e5b8	0xe5b8	0x8	0x0	0x3	WA	4
.data	PROGBITS	0x41e5c4	0xe5c4	0x420	0x0	0x3	WA	4
.bss	NOBITS	0x41e9e4	0xe9e4	0x220c	0x0	0x3	WA	4
.shstrtab	STRTAB	0x0	0xe9e4	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	0x400000	0x400000	0xe5ac	0xe5ac	6.9070	0x5	R E	0x10000	.init .text .fini .rodata
LOAD	0xe5b0	0x41e5b0	0x41e5b0	0x434	0x2640	3.4905	0x6	RW	0x10000	.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
Oct 6, 2024 20:44:08.997669935 CEST	48202	443	192.168.2.13	185.125.190.26
Oct 6, 2024 20:44:41.253710985 CEST	48202	443	192.168.2.13	185.125.190.26

System Behavior

Analysis Process: na.elf PID: 5457, Parent PID: 5375

General

Start time (UTC):	18:44:00
Start date (UTC):	06/10/2024
Path:	/tmp/na.elf
Arguments:	/tmp/na.elf
File size:	4139976 bytes
MD5 hash:	8943e5f8f8c280467b4472c15ae93ba9

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 na.elf

Overview

General Information

Detection

Signatures

Classification

General Information

Warnings

Runtime Messages

Process Tree

Yara Signatures

Suricata Signatures

Joe Sandbox Signatures

AV Detection

Networking

System Summary

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: na.elf PID: 5457, Parent PID: 5375

General

Chronological Activities

Linux Analysis Report
na.elf