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Linux Analysis Report
na.elf

Overview

General Information

Sample name:	na.elf
Analysis ID:	1532512
MD5:	6e4b2522b7fc360d9d6c00a51dd2b363
SHA1:	e4b1340e990cb56746dbb0a77c39eabff5f59f37
SHA256:	56516e052f4a2433a3617724c6f49427e415be0bc84ffc96a840b326da0d1fbf
Tags:	elfuser-abuse_ch
Infos:

Detection

Score:	22
Range:	0 - 100
Whitelisted:	false

Signatures

Connects to many ports of the same IP (likely port scanning)

Detected TCP or UDP traffic on non-standard ports

Found strings indicative of a multi-platform dropper

Sample has stripped symbol table

Sample listens on a socket

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

Classification

General Information

Joe Sandbox version:	41.0.0 Charoite
Analysis ID:	1532512
Start date and time:	2024-10-13 15:19:13 +02:00
Joe Sandbox product:	CloudBasic
Overall analysis duration:	0h 5m 17s
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:	SUS
Classification:	sus22.troj.linELF@0/0@2/0

Runtime Messages

Command:	/tmp/na.elf
PID:	5527
Exit Code:	0
Exit Code Info:
Killed:	False
Standard Output:	thIs wEek on xLaB lEarNs nOthinG xd
Standard Error:

Process Tree

system is lnxubuntu20

na.elf (PID: 5527, Parent: 5443, MD5: 8943e5f8f8c280467b4472c15ae93ba9) Arguments: /tmp/na.elf

na.elf New Fork (PID: 5531, Parent: 5527)

na.elf New Fork (PID: 5533, Parent: 5527)

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

Source: na.elf	String: ash\|login\|wget\|curl\|tftp\|ntpdate
Source: na.elf	String: l/proc//exe\|ash\|login\|wget\|curl\|tftp\|ntpdate/fdsocket\|proc/usr/bin/usr/sbin/system/mnt/mtd/app/org/z/zbin/home/app/dvr/bin/duksan/userfs/mnt/app/usr/etc/dvr/main/usr/local/var/bin/tmp/sqfs/z/bin/dvr/mnt/mtd/zconf/gm/bin/home/process/var/challenge/usr/lib/lib/systemd//usr/lib/systemd/system/system/bin//mnt//home/helper/home/davinci/usr/libexec//sbin//bin/

Networking

Connects to many ports of the same IP (likely port scanning)

Source: global traffic

TCP traffic: 156.244.16.207 ports 1,5,7,8,9,15987

Source: global traffic

TCP traffic: 192.168.2.14:58928 -> 156.244.16.207:15987

Source: /tmp/na.elf (PID: 5527)

Socket: 127.0.0.1:1234

Jump to behavior

Source: unknown	TCP traffic detected without corresponding DNS query: 156.244.16.207
Source: unknown	TCP traffic detected without corresponding DNS query: 156.244.16.207
Source: unknown	TCP traffic detected without corresponding DNS query: 156.244.16.207
Source: unknown	TCP traffic detected without corresponding DNS query: 156.244.16.207
Source: unknown	TCP traffic detected without corresponding DNS query: 156.244.16.207
Source: unknown	TCP traffic detected without corresponding DNS query: 156.244.16.207
Source: unknown	TCP traffic detected without corresponding DNS query: 156.244.16.207
Source: unknown	TCP traffic detected without corresponding DNS query: 156.244.16.207
Source: unknown	TCP traffic detected without corresponding DNS query: 156.244.16.207
Source: unknown	TCP traffic detected without corresponding DNS query: 156.244.16.207
Source: unknown	UDP traffic detected without corresponding DNS query: 185.84.81.194

Source: global traffic

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

Source: ELF static info symbol of initial sample

.symtab present: no

Source: classification engine

Classification label: sus22.troj.linELF@0/0@2/0

Source: /tmp/na.elf (PID: 5527)

Queries kernel information via 'uname':

Jump to behavior

Source: na.elf, 5527.1.00007fff16f46000.00007fff16f67000.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, 5527.1.00007fff16f46000.00007fff16f67000.rw-.sdmp	Binary or memory string: /usr/bin/qemu-sh4
Source: na.elf, 5527.1.000055a407d13000.000055a407d76000.rw-.sdmp	Binary or memory string: U5!/etc/qemu-binfmt/sh4
Source: na.elf, 5527.1.000055a407d13000.000055a407d76000.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	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-Standard Port	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 Non-Application Layer Protocol	Exfiltration Over Bluetooth	Network Denial of Service
Email Addresses	DNS Server	Domain Accounts	At	Logon Script (Windows)	Logon Script (Windows)	Obfuscated Files or Information	Security Account Manager	Query Registry	SMB/Windows Admin Shares	Data from Network Shared Drive	1 Application Layer Protocol	Automated Exfiltration	Data Encrypted for Impact

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

⊘No Antivirus matches

Dropped Files

⊘No Antivirus matches

Domains

Source	Detection	Scanner	Label	Link
daisy.ubuntu.com	0%	Virustotal		Browse

URLs

⊘No Antivirus matches

Domains and IPs

Contacted Domains

Name	IP	Active	Malicious	Antivirus Detection	Reputation
daisy.ubuntu.com	162.213.35.25	true	false	0%, Virustotal, Browse	unknown

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
156.244.16.207	unknown	Seychelles		132839	POWERLINE-AS-APPOWERLINEDATACENTERHK	true
185.84.81.194	unknown	Germany		8648	KAMP-DE	false

Joe Sandbox View / Context

IPs

Match	Associated Sample Name / URL	SHA 256	Detection	Threat Name	Link
156.244.16.207	na.elf	Get hash	malicious	Unknown	Browse
	na.elf	Get hash	malicious	Unknown	Browse
	na.elf	Get hash	malicious	Unknown	Browse
185.84.81.194	MO52No4WnT.elf	Get hash	malicious	Unknown	Browse
	na.elf	Get hash	malicious	Unknown	Browse
	na.elf	Get hash	malicious	Unknown	Browse
	na.elf	Get hash	malicious	Unknown	Browse
	SecuriteInfo.com.Linux.Mirai.5074.23844.14740.elf	Get hash	malicious	Unknown	Browse
	SecuriteInfo.com.Linux.Mirai.5157.925.21651.elf	Get hash	malicious	Unknown	Browse
	mrbbx2evMH.elf	Get hash	malicious	Unknown	Browse
	O8s0ONHbkg.elf	Get hash	malicious	Unknown	Browse
	0aS89usCTf.elf	Get hash	malicious	Unknown	Browse
	G9J8ic1utC.elf	Get hash	malicious	Unknown	Browse

Domains

Match	Associated Sample Name / URL	SHA 256	Detection	Threat Name	Link	Context
daisy.ubuntu.com	arm5.elf	Get hash	malicious	Mirai	Browse	162.213.35.25
	arm6.elf	Get hash	malicious	Mirai, Moobot	Browse	162.213.35.24
	debug.dbg.elf	Get hash	malicious	Mirai, Moobot	Browse	162.213.35.25
	0h7AeM6QgB.elf	Get hash	malicious	Unknown	Browse	162.213.35.24
	na.elf	Get hash	malicious	Unknown	Browse	162.213.35.24
	na.elf	Get hash	malicious	Unknown	Browse	162.213.35.25
	na.elf	Get hash	malicious	Unknown	Browse	162.213.35.24
	na.elf	Get hash	malicious	Mirai	Browse	162.213.35.25
	na.elf	Get hash	malicious	Unknown	Browse	162.213.35.25
	na.elf	Get hash	malicious	Unknown	Browse	162.213.35.24

ASNs

Match	Associated Sample Name / URL	SHA 256	Detection	Threat Name	Link	Context
KAMP-DE	MO52No4WnT.elf	Get hash	malicious	Unknown	Browse	185.84.81.194
	na.elf	Get hash	malicious	Unknown	Browse	185.84.81.194
	na.elf	Get hash	malicious	Mirai	Browse	185.105.253.184
	na.elf	Get hash	malicious	Unknown	Browse	185.84.81.194
	na.elf	Get hash	malicious	Unknown	Browse	185.84.81.194
	SecuriteInfo.com.Linux.Mirai.5074.23844.14740.elf	Get hash	malicious	Unknown	Browse	185.84.81.194
	sora.ppc.elf	Get hash	malicious	Unknown	Browse	212.110.122.35
	mirai.mips.elf	Get hash	malicious	Mirai	Browse	213.146.107.223
	GOoY5QBqvC.elf	Get hash	malicious	Mirai, Moobot	Browse	213.146.107.207
	YOkLx2A3A7.elf	Get hash	malicious	Mirai, Moobot	Browse	213.146.107.212
POWERLINE-AS-APPOWERLINEDATACENTERHK	na.elf	Get hash	malicious	Mirai	Browse	156.250.157.119
	na.elf	Get hash	malicious	Mirai	Browse	154.213.192.29
	na.elf	Get hash	malicious	Unknown	Browse	154.213.192.29
	na.elf	Get hash	malicious	Unknown	Browse	154.213.192.29
	KU4NMyi8i1.elf	Get hash	malicious	Mirai	Browse	156.242.206.27
	jYEvdBHMOI.elf	Get hash	malicious	Mirai	Browse	156.253.238.123
	QmMz1SXUn8.elf	Get hash	malicious	Mirai	Browse	156.251.7.185
	PeleHfdpzX.elf	Get hash	malicious	Mirai	Browse	156.251.7.188
	ULRmk7oYR7.elf	Get hash	malicious	Mirai	Browse	156.250.157.132
	na.elf	Get hash	malicious	Mirai	Browse	154.213.192.29

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):	6.88015105671896
TrID:	ELF Executable and Linkable format (generic) (4004/1) 100.00%
File name:	na.elf
File size:	46'956 bytes
MD5:	6e4b2522b7fc360d9d6c00a51dd2b363
SHA1:	e4b1340e990cb56746dbb0a77c39eabff5f59f37
SHA256:	56516e052f4a2433a3617724c6f49427e415be0bc84ffc96a840b326da0d1fbf
SHA512:	10d63c781042303478106804b2caf056ad2df3ec4c73ef190ee535055111c0c115d5eecf2ea83121b161e0d74d03e07dea7d9f7b36d0157d42c381d99a77fece
SSDEEP:	768:csdN4FgQ3rI9SJuKL7JjtsLYKgXCf+odnGCzrC8:cw4Fg0rIwJuKLdjtsLJgXCZ/rC8
TLSH:	9B238D32CC762E24DA989574F930EF3E5B43D965CA122EEA445382798003FDDF8492F4
File Content Preview:	.ELF.....................@.4...........4. ...(...............@...@...........................A...A.....HE..........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:	46556
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	0xa180	0x0	0x6	AX	32
.fini	PROGBITS	0x40a260	0xa260	0x24	0x0	0x6	AX	4
.rodata	PROGBITS	0x40a284	0xa284	0x1034	0x0	0x2	A	4
.ctors	PROGBITS	0x41b2bc	0xb2bc	0x8	0x0	0x3	WA	4
.dtors	PROGBITS	0x41b2c4	0xb2c4	0x8	0x0	0x3	WA	4
.data	PROGBITS	0x41b2d0	0xb2d0	0x2cc	0x0	0x3	WA	4
.bss	NOBITS	0x41b59c	0xb59c	0x4268	0x0	0x3	WA	4
.shstrtab	STRTAB	0x0	0xb59c	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	0xb2b8	0xb2b8	6.9286	0x5	R E	0x10000	.init .text .fini .rodata
LOAD	0xb2bc	0x41b2bc	0x41b2bc	0x2e0	0x4548	3.8131	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 13, 2024 15:20:09.877563000 CEST	58928	15987	192.168.2.14	156.244.16.207
Oct 13, 2024 15:20:09.882869005 CEST	15987	58928	156.244.16.207	192.168.2.14
Oct 13, 2024 15:20:09.882942915 CEST	58928	15987	192.168.2.14	156.244.16.207
Oct 13, 2024 15:20:09.883265018 CEST	58928	15987	192.168.2.14	156.244.16.207
Oct 13, 2024 15:20:09.888463020 CEST	15987	58928	156.244.16.207	192.168.2.14
Oct 13, 2024 15:20:15.687602997 CEST	15987	58928	156.244.16.207	192.168.2.14
Oct 13, 2024 15:20:15.687676907 CEST	58928	15987	192.168.2.14	156.244.16.207
Oct 13, 2024 15:20:30.700270891 CEST	58928	15987	192.168.2.14	156.244.16.207
Oct 13, 2024 15:20:30.705434084 CEST	15987	58928	156.244.16.207	192.168.2.14
Oct 13, 2024 15:20:45.898817062 CEST	15987	58928	156.244.16.207	192.168.2.14
Oct 13, 2024 15:20:45.899255991 CEST	58928	15987	192.168.2.14	156.244.16.207
Oct 13, 2024 15:21:50.984801054 CEST	15987	58928	156.244.16.207	192.168.2.14
Oct 13, 2024 15:21:50.985297918 CEST	58928	15987	192.168.2.14	156.244.16.207
Oct 13, 2024 15:22:05.988817930 CEST	58928	15987	192.168.2.14	156.244.16.207
Oct 13, 2024 15:22:05.994751930 CEST	15987	58928	156.244.16.207	192.168.2.14
Oct 13, 2024 15:22:09.156496048 CEST	15987	58928	156.244.16.207	192.168.2.14
Oct 13, 2024 15:22:09.157241106 CEST	58928	15987	192.168.2.14	156.244.16.207
Oct 13, 2024 15:23:06.986711025 CEST	15987	58928	156.244.16.207	192.168.2.14
Oct 13, 2024 15:23:06.986855984 CEST	58928	15987	192.168.2.14	156.244.16.207

UDP Packets

Timestamp	Source Port	Dest Port	Source IP	Dest IP
Oct 13, 2024 15:20:08.589009047 CEST	37194	5353	192.168.2.14	185.84.81.194
Oct 13, 2024 15:20:09.874293089 CEST	5353	37194	185.84.81.194	192.168.2.14
Oct 13, 2024 15:22:50.349338055 CEST	38966	53	192.168.2.14	8.8.8.8
Oct 13, 2024 15:22:50.349339008 CEST	37421	53	192.168.2.14	8.8.8.8
Oct 13, 2024 15:22:50.357444048 CEST	53	38966	8.8.8.8	192.168.2.14
Oct 13, 2024 15:22:50.357498884 CEST	53	37421	8.8.8.8	192.168.2.14

DNS Queries

Timestamp	Source IP	Dest IP	Trans ID	OP Code	Name	Type	Class	DNS over HTTPS
Oct 13, 2024 15:22:50.349338055 CEST	192.168.2.14	8.8.8.8	0xe059	Standard query (0)	daisy.ubuntu.com	A (IP address)	IN (0x0001)	false
Oct 13, 2024 15:22:50.349339008 CEST	192.168.2.14	8.8.8.8	0x222a	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
Oct 13, 2024 15:22:50.357444048 CEST	8.8.8.8	192.168.2.14	0xe059	No error (0)	daisy.ubuntu.com		162.213.35.25	A (IP address)	IN (0x0001)	false
Oct 13, 2024 15:22:50.357444048 CEST	8.8.8.8	192.168.2.14	0xe059	No error (0)	daisy.ubuntu.com		162.213.35.24	A (IP address)	IN (0x0001)	false

System Behavior

Analysis Process: na.elf PID: 5527, Parent PID: 5443

General

Start time (UTC):	13:20:06
Start date (UTC):	13/10/2024
Path:	/tmp/na.elf
Arguments:	/tmp/na.elf
File size:	4139976 bytes
MD5 hash:	8943e5f8f8c280467b4472c15ae93ba9

Chronological Activities

Analysis Process: na.elf PID: 5531, Parent PID: 5527

General

Start time (UTC):	13:20:07
Start date (UTC):	13/10/2024
Path:	/tmp/na.elf
Arguments:	-
File size:	4139976 bytes
MD5 hash:	8943e5f8f8c280467b4472c15ae93ba9

Chronological Activities

Analysis Process: na.elf PID: 5533, Parent PID: 5527

General

Start time (UTC):	13:20:07
Start date (UTC):	13/10/2024
Path:	/tmp/na.elf
Arguments:	-
File size:	4139976 bytes
MD5 hash:	8943e5f8f8c280467b4472c15ae93ba9

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 communicate using a protocol and port pairing that are typically not associated. For example, HTTPS over port 8088or port 587as opposed to the traditional port 443. Adversaries may make changes to the standard port used by a protocol to bypass filtering or muddle analysis/parsing of network data.
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

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

Loading Joe Sandbox Report ...

Warning!

Linux Analysis Report na.elf

Overview

General Information

Detection

Signatures

Classification

General Information

Runtime Messages

Process Tree

Yara Signatures

Suricata Signatures

Joe Sandbox Signatures

Spreading

Networking

System Summary

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

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

UDP Packets

DNS Queries

DNS Answers

System Behavior

Analysis Process: na.elf PID: 5527, Parent PID: 5443

General

Chronological Activities

Analysis Process: na.elf PID: 5531, Parent PID: 5527

General

Chronological Activities

Analysis Process: na.elf PID: 5533, Parent PID: 5527

General

Chronological Activities

Linux Analysis Report
na.elf