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Linux Analysis Report
uYtea.arc.elf

Overview

General Information

Sample name:	uYtea.arc.elf
Analysis ID:	1586061
MD5:	014da4b6535f627ff834420f5a5b896a
SHA1:	cf5802c537c4161a11f91043c192016ab8a0639e
SHA256:	a2d459d706dfa2d4cb78ddb9b260738aec313e473f9145711a5b714646009b7d
Tags:	elfuser-abuse_ch
Infos:

Detection

Mirai

Score:	72
Range:	0 - 100
Whitelisted:	false

Signatures

Antivirus / Scanner detection for submitted sample

Malicious sample detected (through community Yara rule)

Multi AV Scanner detection for submitted file

Yara detected Mirai

Executes the "rm" command used to delete files or directories

Sample has stripped symbol table

Tries to connect to HTTP servers, but all servers are down (expired dropper behavior)

Yara signature match

Classification

General Information

Joe Sandbox version:	41.0.0 Charoite
Analysis ID:	1586061
Start date and time:	2025-01-08 17:09:18 +01:00
Joe Sandbox product:	CloudBasic
Overall analysis duration:	0h 4m 7s
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:	uYtea.arc.elf
Detection:	MAL
Classification:	mal72.troj.linELF@0/0@0/0

Runtime Messages

Command:	/tmp/uYtea.arc.elf
PID:	5496
Exit Code:	255
Exit Code Info:
Killed:	False
Standard Output:
Standard Error:

Process Tree

system is lnxubuntu20

dash New Fork (PID: 5473, Parent: 3632)

rm (PID: 5473, Parent: 3632, MD5: aa2b5496fdbfd88e38791ab81f90b95b) Arguments: rm -f /tmp/tmp.NXhaYLEPme /tmp/tmp.ZckDTvkpPU /tmp/tmp.jvleiVNFud

dash New Fork (PID: 5474, Parent: 3632)

rm (PID: 5474, Parent: 3632, MD5: aa2b5496fdbfd88e38791ab81f90b95b) Arguments: rm -f /tmp/tmp.NXhaYLEPme /tmp/tmp.ZckDTvkpPU /tmp/tmp.jvleiVNFud

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
uYtea.arc.elf	JoeSecurity_Mirai_8	Yara detected Mirai	Joe Security
uYtea.arc.elf	Linux_Trojan_Gafgyt_28a2fe0c	unknown	unknown	0x117e4:$a: 2F 78 33 38 2F 78 46 4A 2F 78 39 33 2F 78 49 44 2F 78 39 41 2F 78 33 38 2F 78 46 4A 2F 0x117f8:$a: 2F 78 33 38 2F 78 46 4A 2F 78 39 33 2F 78 49 44 2F 78 39 41 2F 78 33 38 2F 78 46 4A 2F 0x1180c:$a: 2F 78 33 38 2F 78 46 4A 2F 78 39 33 2F 78 49 44 2F 78 39 41 2F 78 33 38 2F 78 46 4A 2F 0x11820:$a: 2F 78 33 38 2F 78 46 4A 2F 78 39 33 2F 78 49 44 2F 78 39 41 2F 78 33 38 2F 78 46 4A 2F 0x11834:$a: 2F 78 33 38 2F 78 46 4A 2F 78 39 33 2F 78 49 44 2F 78 39 41 2F 78 33 38 2F 78 46 4A 2F 0x11848:$a: 2F 78 33 38 2F 78 46 4A 2F 78 39 33 2F 78 49 44 2F 78 39 41 2F 78 33 38 2F 78 46 4A 2F 0x1185c:$a: 2F 78 33 38 2F 78 46 4A 2F 78 39 33 2F 78 49 44 2F 78 39 41 2F 78 33 38 2F 78 46 4A 2F 0x11870:$a: 2F 78 33 38 2F 78 46 4A 2F 78 39 33 2F 78 49 44 2F 78 39 41 2F 78 33 38 2F 78 46 4A 2F 0x11884:$a: 2F 78 33 38 2F 78 46 4A 2F 78 39 33 2F 78 49 44 2F 78 39 41 2F 78 33 38 2F 78 46 4A 2F 0x11898:$a: 2F 78 33 38 2F 78 46 4A 2F 78 39 33 2F 78 49 44 2F 78 39 41 2F 78 33 38 2F 78 46 4A 2F 0x118ac:$a: 2F 78 33 38 2F 78 46 4A 2F 78 39 33 2F 78 49 44 2F 78 39 41 2F 78 33 38 2F 78 46 4A 2F 0x118c0:$a: 2F 78 33 38 2F 78 46 4A 2F 78 39 33 2F 78 49 44 2F 78 39 41 2F 78 33 38 2F 78 46 4A 2F 0x118d4:$a: 2F 78 33 38 2F 78 46 4A 2F 78 39 33 2F 78 49 44 2F 78 39 41 2F 78 33 38 2F 78 46 4A 2F 0x118e8:$a: 2F 78 33 38 2F 78 46 4A 2F 78 39 33 2F 78 49 44 2F 78 39 41 2F 78 33 38 2F 78 46 4A 2F 0x118fc:$a: 2F 78 33 38 2F 78 46 4A 2F 78 39 33 2F 78 49 44 2F 78 39 41 2F 78 33 38 2F 78 46 4A 2F 0x11910:$a: 2F 78 33 38 2F 78 46 4A 2F 78 39 33 2F 78 49 44 2F 78 39 41 2F 78 33 38 2F 78 46 4A 2F 0x11924:$a: 2F 78 33 38 2F 78 46 4A 2F 78 39 33 2F 78 49 44 2F 78 39 41 2F 78 33 38 2F 78 46 4A 2F 0x11938:$a: 2F 78 33 38 2F 78 46 4A 2F 78 39 33 2F 78 49 44 2F 78 39 41 2F 78 33 38 2F 78 46 4A 2F 0x1194c:$a: 2F 78 33 38 2F 78 46 4A 2F 78 39 33 2F 78 49 44 2F 78 39 41 2F 78 33 38 2F 78 46 4A 2F 0x11960:$a: 2F 78 33 38 2F 78 46 4A 2F 78 39 33 2F 78 49 44 2F 78 39 41 2F 78 33 38 2F 78 46 4A 2F 0x11974:$a: 2F 78 33 38 2F 78 46 4A 2F 78 39 33 2F 78 49 44 2F 78 39 41 2F 78 33 38 2F 78 46 4A 2F

Joe Sandbox Signatures

Click to jump to signature section

Show All Signature Results

AV Detection

Antivirus / Scanner detection for submitted sample

Source: uYtea.arc.elf

Avira: detected

Multi AV Scanner detection for submitted file

Source: uYtea.arc.elf

ReversingLabs: Detection: 57%

Source: global traffic

TCP traffic: 192.168.2.14:46540 -> 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 46540 -> 443

System Summary

Malicious sample detected (through community Yara rule)

Source: uYtea.arc.elf, type: SAMPLE

Matched rule: Linux_Trojan_Gafgyt_28a2fe0c Author: unknown

Source: ELF static info symbol of initial sample

.symtab present: no

Source: uYtea.arc.elf, type: SAMPLE

Matched rule: Linux_Trojan_Gafgyt_28a2fe0c os = linux, severity = x86, creation_date = 2021-01-12, scan_context = file, memory, license = Elastic License v2, threat_name = Linux.Trojan.Gafgyt, fingerprint = a2c6beaec18ca876e8487c11bcc7a29279669588aacb7d3027d8d8df8f5bcead, id = 28a2fe0c-eed5-4c79-81e6-3b11b73a4ebd, last_modified = 2021-09-16

Source: classification engine

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

Source: /usr/bin/dash (PID: 5473)	Rm executable: /usr/bin/rm -> rm -f /tmp/tmp.NXhaYLEPme /tmp/tmp.ZckDTvkpPU /tmp/tmp.jvleiVNFud			Jump to behavior
Source: /usr/bin/dash (PID: 5474)	Rm executable: /usr/bin/rm -> rm -f /tmp/tmp.NXhaYLEPme /tmp/tmp.ZckDTvkpPU /tmp/tmp.jvleiVNFud			Jump to behavior

Stealing of Sensitive Information

Yara detected Mirai

Source: Yara match

File source: uYtea.arc.elf, type: SAMPLE

Remote Access Functionality

Yara detected Mirai

Source: Yara match

File source: uYtea.arc.elf, type: SAMPLE

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	1 File Deletion	OS Credential Dumping	System Service 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
uYtea.arc.elf	58%	ReversingLabs	Linux.Trojan.Mirai
uYtea.arc.elf	100%	Avira	EXP/ELF.Mirai.Z.A

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	386.elf	Get hash	malicious	Unknown	Browse
	main_arm5.elf	Get hash	malicious	Mirai	Browse
	gigops.mpsl.elf	Get hash	malicious	Gafgyt	Browse
	94.156.227.153-sora.arm5-2025-01-07T16_09_13.elf	Get hash	malicious	Mirai	Browse
	94.156.227.153-sora.m68k-2025-01-07T16_09_14.elf	Get hash	malicious	Mirai	Browse
	la.bot.powerpc.elf	Get hash	malicious	Mirai	Browse
	arm.elf	Get hash	malicious	Mirai	Browse
	arm7.elf	Get hash	malicious	Mirai	Browse
	arm6.elf	Get hash	malicious	Mirai	Browse
	mips.elf	Get hash	malicious	Unknown	Browse

Domains

⊘No context

ASNs

Match	Associated Sample Name / URL	SHA 256	Detection	Threat Name	Link	Context
CANONICAL-ASGB	uYtea.mpsl.elf	Get hash	malicious	Unknown	Browse	91.189.91.42
	uYtea.x86_64.elf	Get hash	malicious	Unknown	Browse	91.189.91.42
	main_x86_64.elf	Get hash	malicious	Mirai	Browse	91.189.91.42
	Aqua.arm5.elf	Get hash	malicious	Unknown	Browse	91.189.91.42
	main_m68k.elf	Get hash	malicious	Mirai	Browse	91.189.91.42
	main_arm5.elf	Get hash	malicious	Mirai	Browse	91.189.91.42
	mips64.elf	Get hash	malicious	Unknown	Browse	91.189.91.42
	386.elf	Get hash	malicious	Unknown	Browse	185.125.190.26
	mips64el.elf	Get hash	malicious	Unknown	Browse	91.189.91.42
	main_arm5.elf	Get hash	malicious	Mirai	Browse	185.125.190.26

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, Synopsys ARCompact ARC700 cores, version 1 (SYSV), statically linked, stripped
Entropy (8bit):	6.343408331405628
TrID:	ELF Executable and Linkable format (generic) (4004/1) 100.00%
File name:	uYtea.arc.elf
File size:	117'288 bytes
MD5:	014da4b6535f627ff834420f5a5b896a
SHA1:	cf5802c537c4161a11f91043c192016ab8a0639e
SHA256:	a2d459d706dfa2d4cb78ddb9b260738aec313e473f9145711a5b714646009b7d
SHA512:	f479a2c0c1f4f9e13ad1e58c3d6f8438f215eb14e2c2344d51e4fea26c3c5046cfa2bf6f4a44237eed64cc0a5d39d0efcb6ca3a7b604f2ee569fcbd9a7e01a27
SSDEEP:	1536:Rg4uLcytbI96CfY2aye7tcOiyRLqlqOgb3a10S/LWmoo:e4uLcytU960Y2JatcwRLqlqOgbWTqmo
TLSH:	75B39DABF6071591C8A346F007CB4FDE6E1722C29F57C4E36C6E253E58750DB1A0AB86
File Content Preview:	.ELF..............].........4...........4. ...(.................................. ......................\|........ ..................................................................Q.td.......................................................................

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:	0x106d8
Flags:	0x403
ELF Header Size:	52
Program Header Offset:	52
Program Header Size:	32
Number of Program Headers:	5
Section Header Offset:	116728
Section Header Size:	40
Number of Section Headers:	14
Header String Table Index:	13

Sections

Name	Type	Address	Offset	Size	EntSize	Flags	Flags Description	Align
	NULL	0x0	0x0	0x0	0x0	0x0		0
.init	PROGBITS	0x10114	0x114	0x22	0x0	0x6	AX	1
.text	PROGBITS	0x10138	0x138	0x111d4	0x0	0x6	AX	4
.fini	PROGBITS	0x2130c	0x1130c	0x16	0x0	0x6	AX	1
.rodata	PROGBITS	0x21324	0x11324	0x9284	0x0	0x2	A	4
.tbss	NOBITS	0x2dfe0	0x1bfe0	0x8	0x0	0x403	WAT	4
.fini_array	FINI_ARRAY	0x2dfe0	0x1bfe0	0x4	0x4	0x3	WA	4
.ctors	PROGBITS	0x2dfe4	0x1bfe4	0x8	0x0	0x3	WA	4
.dtors	PROGBITS	0x2dfec	0x1bfec	0x8	0x0	0x3	WA	4
.got	PROGBITS	0x2dff4	0x1bff4	0x8	0x0	0x3	WA	4
.data	PROGBITS	0x2e008	0x1c008	0x758	0x0	0x3	WA	4
.bss	NOBITS	0x2e760	0x1c760	0x7bfc	0x0	0x3	WA	4
.ARC.attributes	<unknown>	0x0	0x1c760	0x32	0x0	0x0		1
.shstrtab	STRTAB	0x0	0x1c792	0x65	0x0	0x0		1

Program Segments

Type	Offset	Virtual Address	Physical Address	File Size	Memory Size	Entropy	Flags	Flags Description	Align	Section Mappings
LOAD	0x0	0x10000	0x10000	0x1a5a8	0x1a5a8	6.6206	0x5	R E	0x2000	.init .text .fini .rodata
LOAD	0x1bfe0	0x2dfe0	0x2dfe0	0x780	0x837c	4.5470	0x6	RW	0x2000	.tbss .fini_array .ctors .dtors .got .data .bss
NOTE	0x0	0x0	0x0	0x0	0x0	0.0000	0x4	R	0x4
TLS	0x1bfe0	0x2dfe0	0x2dfe0	0x0	0x8	0.0000	0x4	R	0x4	.tbss
GNU_STACK	0x0	0x0	0x0	0x0	0x0	0.0000	0x6	RW	0x4

Network Behavior

Network Port Distribution

TCP Packets

Timestamp	Source Port	Dest Port	Source IP	Dest IP
Jan 8, 2025 17:10:07.075364113 CET	46540	443	192.168.2.14	185.125.190.26
Jan 8, 2025 17:10:38.562212944 CET	46540	443	192.168.2.14	185.125.190.26

System Behavior

Analysis Process: dash PID: 5473, Parent PID: 3632

General

Start time (UTC):	16:09:50
Start date (UTC):	08/01/2025
Path:	/usr/bin/dash
Arguments:	-
File size:	129816 bytes
MD5 hash:	1e6b1c887c59a315edb7eb9a315fc84c

Chronological Activities

Analysis Process: rm PID: 5473, Parent PID: 3632

General

Start time (UTC):	16:09:50
Start date (UTC):	08/01/2025
Path:	/usr/bin/rm
Arguments:	rm -f /tmp/tmp.NXhaYLEPme /tmp/tmp.ZckDTvkpPU /tmp/tmp.jvleiVNFud
File size:	72056 bytes
MD5 hash:	aa2b5496fdbfd88e38791ab81f90b95b

Chronological Activities

Analysis Process: dash PID: 5474, Parent PID: 3632

General

Start time (UTC):	16:09:50
Start date (UTC):	08/01/2025
Path:	/usr/bin/dash
Arguments:	-
File size:	129816 bytes
MD5 hash:	1e6b1c887c59a315edb7eb9a315fc84c

Chronological Activities

Analysis Process: rm PID: 5474, Parent PID: 3632

General

Start time (UTC):	16:09:50
Start date (UTC):	08/01/2025
Path:	/usr/bin/rm
Arguments:	rm -f /tmp/tmp.NXhaYLEPme /tmp/tmp.ZckDTvkpPU /tmp/tmp.jvleiVNFud
File size:	72056 bytes
MD5 hash:	aa2b5496fdbfd88e38791ab81f90b95b

Description:	Adversaries may delete files left behind by the actions of their intrusion activity. Malware, tools, or other non-native files dropped or created on a system by an adversary (ex: Ingress Tool Transfer ) may leave traces to indicate to what was done within a network and how. Removal of these files can occur during an intrusion, or as part of a post-intrusion process to minimize the adversary's footprint.
Tactics:	Defense Evasion
Data Sources:	Command: Command Execution, File: File Deletion
Platforms:	Linux, macOS, 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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Linux Analysis Report uYtea.arc.elf

Overview

General Information

Detection

Signatures

Classification

General Information

Warnings

Runtime Messages

Process Tree

Malware Threat Intel

Yara Signatures

Initial Sample

Suricata Signatures

Joe Sandbox Signatures

AV Detection

Networking

System Summary

Persistence and Installation Behavior

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: dash PID: 5473, Parent PID: 3632

General

Chronological Activities

Analysis Process: rm PID: 5473, Parent PID: 3632

General

Chronological Activities

Analysis Process: dash PID: 5474, Parent PID: 3632

General

Chronological Activities

Analysis Process: rm PID: 5474, Parent PID: 3632

General

Chronological Activities

Linux Analysis Report
uYtea.arc.elf