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Linux Analysis Report
nemil.sh4.elf

Overview

General Information

Sample name:	nemil.sh4.elf
Analysis ID:	1664234
MD5:	09c6ec67d4540a98156177650f40f21f
SHA1:	d62642c1a36c0724245e0ab459bf2c3edc3fc201
SHA256:	eee9b2eb38b5f38b6572975ca5bde87e81ec56754745e010a6da67a04fbeb475
Tags:	elfuser-abuse_ch
Infos:

Detection

Mirai

Score:	72
Range:	0 - 100

Signatures

Antivirus / Scanner detection for submitted sample

Malicious sample detected (through community Yara rule)

Multi AV Scanner detection for submitted file

Yara detected Mirai

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

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)

Yara signature match

Classification

General Information

Joe Sandbox version:	42.0.0 Malachite
Analysis ID:	1664234
Start date and time:	2025-04-13 21:00:19 +02:00
Joe Sandbox product:	CloudBasic
Overall analysis duration:	0h 4m 35s
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:	nemil.sh4.elf
Detection:	MAL
Classification:	mal72.troj.linELF@0/0@0/0

Runtime Messages

Command:	/tmp/nemil.sh4.elf
PID:	6248
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

nemil.sh4.elf (PID: 6248, Parent: 6167, MD5: 8943e5f8f8c280467b4472c15ae93ba9) Arguments: /tmp/nemil.sh4.elf

cleanup

Malware Threat Intel

Provided by

Name	Description	Attribution	Blogpost URLs	Link
Mirai	Mirai is one of the first significant botnets targeting exposed networking devices running Linux. Found in August 2016 by MalwareMustDie, its name means "future" in Japanese. Nowadays it targets a wide range of networked embedded devices such as IP cameras, home routers (many vendors involved), and other IoT devices. Since the source code was published on "Hack Forums" many variants of the Mirai family appeared, infecting mostly home networks all around the world.	No Attribution	http://osint.bambenekconsulting.com/feeds/ http://www.simonroses.com/2016/10/mirai-ddos-botnet-source-code-binary-analysis/ https://blog.malwaremustdie.org/2020/02/mmd-0065-2021-linuxmirai-fbot-re.html https://blog.netlab.360.com/another-lilin-dvr-0-day-being-used-to-spread-mirai-en/ https://blog.netlab.360.com/mirai_ptea-botnet-is-exploiting-undisclosed-kguard-dvr-vulnerability-en/	https://malpedia.caad.fkie.fraunhofer.de/details/elf.mirai

Yara Signatures

Initial Sample

Source	Rule	Description	Author	Strings
nemil.sh4.elf	JoeSecurity_Mirai_5	Yara detected Mirai	Joe Security
nemil.sh4.elf	MAL_ELF_LNX_Mirai_Oct10_2	Detects ELF malware Mirai related	Florian Roth	0x11d84:$c01: 50 4F 53 54 20 2F 63 64 6E 2D 63 67 69 2F 00 00 20 48 54 54 50 2F 31 2E 31 0D 0A 55 73 65 72 2D 41 67 65 6E 74 3A 20 00 0D 0A 48 6F 73 74 3A

Memory Dumps

Source	Rule	Description	Author	Strings
6248.1.00007f3ea0400000.00007f3ea0414000.r-x.sdmp	JoeSecurity_Mirai_5	Yara detected Mirai	Joe Security
6248.1.00007f3ea0400000.00007f3ea0414000.r-x.sdmp	MAL_ELF_LNX_Mirai_Oct10_2	Detects ELF malware Mirai related	Florian Roth	0x11d84:$c01: 50 4F 53 54 20 2F 63 64 6E 2D 63 67 69 2F 00 00 20 48 54 54 50 2F 31 2E 31 0D 0A 55 73 65 72 2D 41 67 65 6E 74 3A 20 00 0D 0A 48 6F 73 74 3A

Suricata Signatures

⊘No Suricata rule has matched

Joe Sandbox Signatures

Click to jump to signature section

Show All Signature Results

AV Detection

Antivirus / Scanner detection for submitted sample

Source: nemil.sh4.elf

Avira: detected

Multi AV Scanner detection for submitted file

Source: nemil.sh4.elf	Virustotal: Detection: 57%			Perma Link
Source: nemil.sh4.elf	ReversingLabs: Detection: 69%

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

System Summary

Malicious sample detected (through community Yara rule)

Source: nemil.sh4.elf, type: SAMPLE	Matched rule: Detects ELF malware Mirai related Author: Florian Roth
Source: 6248.1.00007f3ea0400000.00007f3ea0414000.r-x.sdmp, type: MEMORY	Matched rule: Detects ELF malware Mirai related Author: Florian Roth

Source: Initial sample	String containing 'busybox' found: /bin/busybox
Source: Initial sample	String containing 'busybox' found: ;httpurl=POST'=.x86.x86_64.arm.arm5.arm6.arm7.mips.mipsel.sh4.ppc/proc/proc/%d/exe/proc/%s/statusrName:%s/bin/busybox/bin/systemd/usr/bintest/tmp/condi/tmp/zxcr9999/tmp/condinetwork/var/condibot/var/zxcr9999/var/CondiBot/var/condinet/bin/watchdog/proc/net/tcppayload/etc/cron.d/killer_cronw/proc/self/exe%s/%s* * * * * root %s

Source: ELF static info symbol of initial sample

.symtab present: no

Source: nemil.sh4.elf, type: SAMPLE	Matched rule: MAL_ELF_LNX_Mirai_Oct10_2 date = 2018-10-27, hash1 = fa0018e75f503f9748a5de0d14d4358db234f65e28c31c8d5878cc58807081c9, author = Florian Roth, description = Detects ELF malware Mirai related, reference = Internal Research
Source: 6248.1.00007f3ea0400000.00007f3ea0414000.r-x.sdmp, type: MEMORY	Matched rule: MAL_ELF_LNX_Mirai_Oct10_2 date = 2018-10-27, hash1 = fa0018e75f503f9748a5de0d14d4358db234f65e28c31c8d5878cc58807081c9, author = Florian Roth, description = Detects ELF malware Mirai related, reference = Internal Research

Source: classification engine

Classification label: mal72.troj.linELF@0/0@0/0

Source: /tmp/nemil.sh4.elf (PID: 6248)

Queries kernel information via 'uname':

Jump to behavior

Source: nemil.sh4.elf, 6248.1.00007fffd51d8000.00007fffd51f9000.rw-.sdmp	Binary or memory string: (x86_64/usr/bin/qemu-sh4/tmp/nemil.sh4.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/nemil.sh4.elf
Source: nemil.sh4.elf, 6248.1.00007fffd51d8000.00007fffd51f9000.rw-.sdmp	Binary or memory string: /usr/bin/qemu-sh4
Source: nemil.sh4.elf, 6248.1.00005571f664e000.00005571f66b1000.rw-.sdmp	Binary or memory string: /etc/qemu-binfmt/sh4
Source: nemil.sh4.elf, 6248.1.00005571f664e000.00005571f66b1000.rw-.sdmp	Binary or memory string: qU5!/etc/qemu-binfmt/sh4
Source: nemil.sh4.elf, 6248.1.00007fffd51d8000.00007fffd51f9000.rw-.sdmp	Binary or memory string: qemu: uncaught target signal 11 (Segmentation fault) - core dumped

Stealing of Sensitive Information

Yara detected Mirai

Source: Yara match	File source: nemil.sh4.elf, type: SAMPLE
Source: Yara match	File source: 6248.1.00007f3ea0400000.00007f3ea0414000.r-x.sdmp, type: MEMORY

Remote Access Functionality

Yara detected Mirai

Source: Yara match	File source: nemil.sh4.elf, type: SAMPLE
Source: Yara match	File source: 6248.1.00007f3ea0400000.00007f3ea0414000.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	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
nemil.sh4.elf	57%	Virustotal		Browse
nemil.sh4.elf	69%	ReversingLabs	Linux.Trojan.Mirai
nemil.sh4.elf	100%	Avira	EXP/ELF.Mirai.Bootnet.ob

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	na.elf	Get hash	malicious	Prometei	Browse
	nemil.mips.elf	Get hash	malicious	Mirai	Browse
	nklarm6.elf	Get hash	malicious	Unknown	Browse
	na.elf	Get hash	malicious	Prometei	Browse
	nemil.arm5.elf	Get hash	malicious	Mirai	Browse
	zerarm7.elf	Get hash	malicious	Unknown	Browse
	zerarm6.elf	Get hash	malicious	Unknown	Browse
	na.elf	Get hash	malicious	Prometei	Browse
	na.elf	Get hash	malicious	Prometei	Browse
	na.elf	Get hash	malicious	Prometei	Browse
91.189.91.42	na.elf	Get hash	malicious	Prometei	Browse
	nemil.mips.elf	Get hash	malicious	Mirai	Browse
	na.elf	Get hash	malicious	Prometei	Browse
	zermips.elf	Get hash	malicious	Unknown	Browse
	nklarm6.elf	Get hash	malicious	Unknown	Browse
	na.elf	Get hash	malicious	Prometei	Browse
	nemil.arm5.elf	Get hash	malicious	Mirai	Browse
	zerarm7.elf	Get hash	malicious	Unknown	Browse
	zerarm6.elf	Get hash	malicious	Unknown	Browse
	na.elf	Get hash	malicious	Prometei	Browse

Domains

⊘No context

ASNs

Match	Associated Sample Name / URL	SHA 256	Detection	Threat Name	Link	Context
CANONICAL-ASGB	na.elf	Get hash	malicious	Prometei	Browse	91.189.91.42
	nemil.mips.elf	Get hash	malicious	Mirai	Browse	91.189.91.42
	na.elf	Get hash	malicious	Prometei	Browse	91.189.91.42
	zermips.elf	Get hash	malicious	Unknown	Browse	91.189.91.42
	nklarm6.elf	Get hash	malicious	Unknown	Browse	91.189.91.42
	na.elf	Get hash	malicious	Prometei	Browse	91.189.91.42
	nemil.arm5.elf	Get hash	malicious	Mirai	Browse	91.189.91.42
	zerarm7.elf	Get hash	malicious	Unknown	Browse	91.189.91.42
	zerarm6.elf	Get hash	malicious	Unknown	Browse	91.189.91.42
	na.elf	Get hash	malicious	Prometei	Browse	91.189.91.42
CANONICAL-ASGB	na.elf	Get hash	malicious	Prometei	Browse	91.189.91.42
	nemil.mips.elf	Get hash	malicious	Mirai	Browse	91.189.91.42
	na.elf	Get hash	malicious	Prometei	Browse	91.189.91.42
	zermips.elf	Get hash	malicious	Unknown	Browse	91.189.91.42
	nklarm6.elf	Get hash	malicious	Unknown	Browse	91.189.91.42
	na.elf	Get hash	malicious	Prometei	Browse	91.189.91.42
	nemil.arm5.elf	Get hash	malicious	Mirai	Browse	91.189.91.42
	zerarm7.elf	Get hash	malicious	Unknown	Browse	91.189.91.42
	zerarm6.elf	Get hash	malicious	Unknown	Browse	91.189.91.42
	na.elf	Get hash	malicious	Prometei	Browse	91.189.91.42
INIT7CH	na.elf	Get hash	malicious	Prometei	Browse	109.202.202.202
	nemil.mips.elf	Get hash	malicious	Mirai	Browse	109.202.202.202
	na.elf	Get hash	malicious	Prometei	Browse	109.202.202.202
	zermips.elf	Get hash	malicious	Unknown	Browse	109.202.202.202
	zerx86.elf	Get hash	malicious	Unknown	Browse	109.202.202.202
	nklarm6.elf	Get hash	malicious	Unknown	Browse	109.202.202.202
	na.elf	Get hash	malicious	Prometei	Browse	109.202.202.202
	nemil.arm5.elf	Get hash	malicious	Mirai	Browse	109.202.202.202
	zerarm7.elf	Get hash	malicious	Unknown	Browse	109.202.202.202
	zerarm6.elf	Get hash	malicious	Unknown	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, Renesas SH, version 1 (SYSV), statically linked, stripped
Entropy (8bit):	6.732431422573462
TrID:	ELF Executable and Linkable format (generic) (4004/1) 100.00%
File name:	nemil.sh4.elf
File size:	83'324 bytes
MD5:	09c6ec67d4540a98156177650f40f21f
SHA1:	d62642c1a36c0724245e0ab459bf2c3edc3fc201
SHA256:	eee9b2eb38b5f38b6572975ca5bde87e81ec56754745e010a6da67a04fbeb475
SHA512:	81d037888912aea9000615da41028f19fcc0f4bab6b4d57d6a440bfec4f9f352787a9004efb38220abf21b5965c6d5bd8ff465bad17397f25e142c08ba98ef0e
SSDEEP:	1536:Haq3mWqiJSmV2gi65kUktpE+MzLQs3HwYXtsKs5B4xDwW4CbPHC:HJmWhgUL/sloQ+H7XtzsoDwTOC
TLSH:	2A83CF72E5B86E68C55188B4BAE4CE388723B50480673EFA9556C32D8047FECF4563F6
File Content Preview:	.ELF.....................@.4....C......4. ...(...............@...@..9...9...............@...@B..@B......(..........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:	82884
Section Header Size:	40
Number of Section Headers:	11
Header String Table Index:	10

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	0x11c80	0x0	0x6	AX	32
.fini	PROGBITS	0x411d60	0x11d60	0x24	0x0	0x6	AX	4
.rodata	PROGBITS	0x411d84	0x11d84	0x1c34	0x0	0x2	A	4
.ctors	PROGBITS	0x424000	0x14000	0x8	0x0	0x3	WA	4
.dtors	PROGBITS	0x424008	0x14008	0x8	0x0	0x3	WA	4
.data	PROGBITS	0x424014	0x14014	0x35c	0x0	0x3	WA	4
.got	PROGBITS	0x424370	0x14370	0x10	0x4	0x3	WA	4
.bss	NOBITS	0x424380	0x14380	0x2548	0x0	0x3	WA	4
.shstrtab	STRTAB	0x0	0x14380	0x43	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	0x139b8	0x139b8	6.8494	0x5	R E	0x10000	.init .text .fini .rodata
LOAD	0x14000	0x424000	0x424000	0x380	0x28c8	2.7332	0x6	RW	0x10000	.ctors .dtors .data .got .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
Apr 13, 2025 21:01:06.270828009 CEST	43928	443	192.168.2.23	91.189.91.42
Apr 13, 2025 21:01:11.646266937 CEST	42836	443	192.168.2.23	91.189.91.43
Apr 13, 2025 21:01:12.670046091 CEST	42516	80	192.168.2.23	109.202.202.202
Apr 13, 2025 21:01:27.004195929 CEST	43928	443	192.168.2.23	91.189.91.42
Apr 13, 2025 21:01:37.242693901 CEST	42836	443	192.168.2.23	91.189.91.43
Apr 13, 2025 21:01:43.385948896 CEST	42516	80	192.168.2.23	109.202.202.202
Apr 13, 2025 21:02:07.958714962 CEST	43928	443	192.168.2.23	91.189.91.42
Apr 13, 2025 21:02:28.436237097 CEST	42836	443	192.168.2.23	91.189.91.43

System Behavior

Analysis Process: nemil.sh4.elf PID: 6248, Parent PID: 6167

General

Start time (UTC):	19:01:05
Start date (UTC):	13/04/2025
Path:	/tmp/nemil.sh4.elf
Arguments:	/tmp/nemil.sh4.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

Loading Joe Sandbox Report ...

Warning!

Linux Analysis Report nemil.sh4.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

Networking

System Summary

Malware Analysis System Evasion

Stealing of Sensitive Information

Remote Access Functionality

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: nemil.sh4.elf PID: 6248, Parent PID: 6167

General

Chronological Activities

Linux Analysis Report
nemil.sh4.elf