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Linux Analysis Report
most-arm6.elf

Overview

General Information

Sample name:	most-arm6.elf
Analysis ID:	1653747
MD5:	5c5666bc417203a4f70218c88fc84df3
SHA1:	4ac267770edd85264ae769d3b7739dd8d627837e
SHA256:	0c499a0a944b9d28b259e55f4c5c3e5d6eaaeb6105f9b2c7f94b6c44fb93b319
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

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

Found strings indicative of a multi-platform dropper

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

Sample has stripped symbol table

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:	1653747
Start date and time:	2025-04-01 15:57:22 +02:00
Joe Sandbox product:	CloudBasic
Overall analysis duration:	0h 4m 38s
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:	most-arm6.elf
Detection:	MAL
Classification:	mal72.troj.linELF@0/0@0/0

Runtime Messages

Command:	/tmp/most-arm6.elf
PID:	6253
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

most-arm6.elf (PID: 6253, Parent: 6175, MD5: 5ebfcae4fe2471fcc5695c2394773ff1) Arguments: /tmp/most-arm6.elf

dash New Fork (PID: 6334, Parent: 4334)

rm (PID: 6334, Parent: 4334, MD5: aa2b5496fdbfd88e38791ab81f90b95b) Arguments: rm -f /tmp/tmp.RWeYhTIL7N /tmp/tmp.6WkesNl68g /tmp/tmp.04M14Izvlm

dash New Fork (PID: 6335, Parent: 4334)

rm (PID: 6335, Parent: 4334, MD5: aa2b5496fdbfd88e38791ab81f90b95b) Arguments: rm -f /tmp/tmp.RWeYhTIL7N /tmp/tmp.6WkesNl68g /tmp/tmp.04M14Izvlm

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
most-arm6.elf	JoeSecurity_Mirai_8	Yara detected Mirai	Joe Security
most-arm6.elf	Linux_Trojan_Gafgyt_28a2fe0c	unknown	unknown	0x1cb14:$a: 2F 78 33 38 2F 78 46 4A 2F 78 39 33 2F 78 49 44 2F 78 39 41 2F 78 33 38 2F 78 46 4A 2F 0x1cb28:$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 0x1cb3c:$a: 2F 78 33 38 2F 78 46 4A 2F 78 39 33 2F 78 49 44 2F 78 39 41 2F 78 33 38 2F 78 46 4A 2F 0x1cb50:$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 0x1cb64:$a: 2F 78 33 38 2F 78 46 4A 2F 78 39 33 2F 78 49 44 2F 78 39 41 2F 78 33 38 2F 78 46 4A 2F 0x1cb78:$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 0x1cb8c:$a: 2F 78 33 38 2F 78 46 4A 2F 78 39 33 2F 78 49 44 2F 78 39 41 2F 78 33 38 2F 78 46 4A 2F 0x1cba0:$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 0x1cbb4:$a: 2F 78 33 38 2F 78 46 4A 2F 78 39 33 2F 78 49 44 2F 78 39 41 2F 78 33 38 2F 78 46 4A 2F 0x1cbc8:$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 0x1cbdc:$a: 2F 78 33 38 2F 78 46 4A 2F 78 39 33 2F 78 49 44 2F 78 39 41 2F 78 33 38 2F 78 46 4A 2F 0x1cbf0:$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 0x1cc04:$a: 2F 78 33 38 2F 78 46 4A 2F 78 39 33 2F 78 49 44 2F 78 39 41 2F 78 33 38 2F 78 46 4A 2F 0x1cc18:$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 0x1cc2c:$a: 2F 78 33 38 2F 78 46 4A 2F 78 39 33 2F 78 49 44 2F 78 39 41 2F 78 33 38 2F 78 46 4A 2F 0x1cc40:$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 0x1cc54:$a: 2F 78 33 38 2F 78 46 4A 2F 78 39 33 2F 78 49 44 2F 78 39 41 2F 78 33 38 2F 78 46 4A 2F 0x1cc68:$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 0x1cc7c:$a: 2F 78 33 38 2F 78 46 4A 2F 78 39 33 2F 78 49 44 2F 78 39 41 2F 78 33 38 2F 78 46 4A 2F 0x1cc90:$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 0x1cca4:$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

Memory Dumps

Source	Rule	Description	Author	Strings
6253.1.00007f80b8017000.00007f80b8037000.r-x.sdmp	JoeSecurity_Mirai_8	Yara detected Mirai	Joe Security
6253.1.00007f80b8017000.00007f80b8037000.r-x.sdmp	Linux_Trojan_Gafgyt_28a2fe0c	unknown	unknown	0x1cb14:$a: 2F 78 33 38 2F 78 46 4A 2F 78 39 33 2F 78 49 44 2F 78 39 41 2F 78 33 38 2F 78 46 4A 2F 0x1cb28:$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 0x1cb3c:$a: 2F 78 33 38 2F 78 46 4A 2F 78 39 33 2F 78 49 44 2F 78 39 41 2F 78 33 38 2F 78 46 4A 2F 0x1cb50:$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 0x1cb64:$a: 2F 78 33 38 2F 78 46 4A 2F 78 39 33 2F 78 49 44 2F 78 39 41 2F 78 33 38 2F 78 46 4A 2F 0x1cb78:$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 0x1cb8c:$a: 2F 78 33 38 2F 78 46 4A 2F 78 39 33 2F 78 49 44 2F 78 39 41 2F 78 33 38 2F 78 46 4A 2F 0x1cba0:$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 0x1cbb4:$a: 2F 78 33 38 2F 78 46 4A 2F 78 39 33 2F 78 49 44 2F 78 39 41 2F 78 33 38 2F 78 46 4A 2F 0x1cbc8:$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 0x1cbdc:$a: 2F 78 33 38 2F 78 46 4A 2F 78 39 33 2F 78 49 44 2F 78 39 41 2F 78 33 38 2F 78 46 4A 2F 0x1cbf0:$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 0x1cc04:$a: 2F 78 33 38 2F 78 46 4A 2F 78 39 33 2F 78 49 44 2F 78 39 41 2F 78 33 38 2F 78 46 4A 2F 0x1cc18:$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 0x1cc2c:$a: 2F 78 33 38 2F 78 46 4A 2F 78 39 33 2F 78 49 44 2F 78 39 41 2F 78 33 38 2F 78 46 4A 2F 0x1cc40:$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 0x1cc54:$a: 2F 78 33 38 2F 78 46 4A 2F 78 39 33 2F 78 49 44 2F 78 39 41 2F 78 33 38 2F 78 46 4A 2F 0x1cc68:$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 0x1cc7c:$a: 2F 78 33 38 2F 78 46 4A 2F 78 39 33 2F 78 49 44 2F 78 39 41 2F 78 33 38 2F 78 46 4A 2F 0x1cc90:$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 0x1cca4:$a: 2F 78 33 38 2F 78 46 4A 2F 78 39 33 2F 78 49 44 2F 78 39 41 2F 78 33 38 2F 78 46 4A 2F
Process Memory Space: most-arm6.elf PID: 6253	JoeSecurity_Mirai_8	Yara detected Mirai	Joe Security
Process Memory Space: most-arm6.elf PID: 6253	Linux_Trojan_Gafgyt_28a2fe0c	unknown	unknown	0x11380:$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 0x11394:$a: 2F 78 33 38 2F 78 46 4A 2F 78 39 33 2F 78 49 44 2F 78 39 41 2F 78 33 38 2F 78 46 4A 2F 0x113a8:$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 0x113bc:$a: 2F 78 33 38 2F 78 46 4A 2F 78 39 33 2F 78 49 44 2F 78 39 41 2F 78 33 38 2F 78 46 4A 2F 0x113d0:$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 0x113e4:$a: 2F 78 33 38 2F 78 46 4A 2F 78 39 33 2F 78 49 44 2F 78 39 41 2F 78 33 38 2F 78 46 4A 2F 0x113f8:$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 0x1140c:$a: 2F 78 33 38 2F 78 46 4A 2F 78 39 33 2F 78 49 44 2F 78 39 41 2F 78 33 38 2F 78 46 4A 2F 0x11420:$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 0x11434:$a: 2F 78 33 38 2F 78 46 4A 2F 78 39 33 2F 78 49 44 2F 78 39 41 2F 78 33 38 2F 78 46 4A 2F 0x11448:$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 0x1145c:$a: 2F 78 33 38 2F 78 46 4A 2F 78 39 33 2F 78 49 44 2F 78 39 41 2F 78 33 38 2F 78 46 4A 2F 0x11470:$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 0x11484:$a: 2F 78 33 38 2F 78 46 4A 2F 78 39 33 2F 78 49 44 2F 78 39 41 2F 78 33 38 2F 78 46 4A 2F 0x11498:$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 0x114ac:$a: 2F 78 33 38 2F 78 46 4A 2F 78 39 33 2F 78 49 44 2F 78 39 41 2F 78 33 38 2F 78 46 4A 2F 0x114c0:$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 0x114d4:$a: 2F 78 33 38 2F 78 46 4A 2F 78 39 33 2F 78 49 44 2F 78 39 41 2F 78 33 38 2F 78 46 4A 2F 0x114e8:$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 0x114fc:$a: 2F 78 33 38 2F 78 46 4A 2F 78 39 33 2F 78 49 44 2F 78 39 41 2F 78 33 38 2F 78 46 4A 2F 0x11510:$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

Suricata Signatures

⊘No Suricata rule has matched

Joe Sandbox Signatures

• AV Detection
• Spreading
• Networking
• System Summary
• Persistence and Installation Behavior
• Malware Analysis System Evasion
• Stealing of Sensitive Information
• Remote Access Functionality

Click to jump to signature section

Show All Signature Results

AV Detection

Antivirus / Scanner detection for submitted sample

Source: most-arm6.elf

Avira: detected

Multi AV Scanner detection for submitted file

Source: most-arm6.elf	ReversingLabs: Detection: 47%
Source: most-arm6.elf	Virustotal: Detection: 39%			Perma Link

Source: most-arm6.elf

String: nh con../dvr_gui./upnp_server./dvr_app./pkillkillallwgetbusyboxtopcurlrebootpsftptftppgrepgrepxargsawktoyboxsuTT

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: 34.249.145.219
Source: unknown	TCP traffic detected without corresponding DNS query: 34.249.145.219
Source: unknown	TCP traffic detected without corresponding DNS query: 34.249.145.219
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: 34.249.145.219

Source: unknown	Network traffic detected: HTTP traffic on port 39244 -> 443
Source: unknown	Network traffic detected: HTTP traffic on port 443 -> 39244
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: most-arm6.elf, type: SAMPLE	Matched rule: Linux_Trojan_Gafgyt_28a2fe0c Author: unknown
Source: 6253.1.00007f80b8017000.00007f80b8037000.r-x.sdmp, type: MEMORY	Matched rule: Linux_Trojan_Gafgyt_28a2fe0c Author: unknown
Source: Process Memory Space: most-arm6.elf PID: 6253, type: MEMORYSTR	Matched rule: Linux_Trojan_Gafgyt_28a2fe0c Author: unknown

Source: Initial sample	String containing 'busybox' found: busybox
Source: Initial sample	String containing 'busybox' found: nh con../dvr_gui./upnp_server./dvr_app./pkillkillallwgetbusyboxtopcurlrebootpsftptftppgrepgrepxargsawktoyboxsuTT

Source: ELF static info symbol of initial sample

.symtab present: no

Source: most-arm6.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: 6253.1.00007f80b8017000.00007f80b8037000.r-x.sdmp, type: MEMORY	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: Process Memory Space: most-arm6.elf PID: 6253, type: MEMORYSTR	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: 6334)	Rm executable: /usr/bin/rm -> rm -f /tmp/tmp.RWeYhTIL7N /tmp/tmp.6WkesNl68g /tmp/tmp.04M14Izvlm			Jump to behavior
Source: /usr/bin/dash (PID: 6335)	Rm executable: /usr/bin/rm -> rm -f /tmp/tmp.RWeYhTIL7N /tmp/tmp.6WkesNl68g /tmp/tmp.04M14Izvlm			Jump to behavior

Source: /tmp/most-arm6.elf (PID: 6253)

Queries kernel information via 'uname':

Jump to behavior

Source: most-arm6.elf, 6253.1.000055e8b29c4000.000055e8b2af2000.rw-.sdmp	Binary or memory string: U!/etc/qemu-binfmt/arm
Source: most-arm6.elf, 6253.1.000055e8b29c4000.000055e8b2af2000.rw-.sdmp	Binary or memory string: /etc/qemu-binfmt/arm
Source: most-arm6.elf, 6253.1.00007ffcf977b000.00007ffcf979c000.rw-.sdmp	Binary or memory string: /usr/bin/qemu-arm
Source: most-arm6.elf, 6253.1.00007ffcf977b000.00007ffcf979c000.rw-.sdmp	Binary or memory string: nx86_64/usr/bin/qemu-arm/tmp/most-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/most-arm6.elf
Source: most-arm6.elf, 6253.1.00007ffcf977b000.00007ffcf979c000.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: most-arm6.elf, type: SAMPLE
Source: Yara match	File source: 6253.1.00007f80b8017000.00007f80b8037000.r-x.sdmp, type: MEMORY
Source: Yara match	File source: Process Memory Space: most-arm6.elf PID: 6253, type: MEMORYSTR

Remote Access Functionality

Yara detected Mirai

Source: Yara match	File source: most-arm6.elf, type: SAMPLE
Source: Yara match	File source: 6253.1.00007f80b8017000.00007f80b8037000.r-x.sdmp, type: MEMORY
Source: Yara match	File source: Process Memory Space: most-arm6.elf PID: 6253, type: MEMORYSTR

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	1 File Deletion	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
most-arm6.elf	47%	ReversingLabs	Linux.Backdoor.Mirai
most-arm6.elf	39%	Virustotal		Browse
most-arm6.elf	100%	Avira	EXP/ELF.Mirai.Z.A

Dropped Files

⊘No Antivirus matches

Domains

⊘No Antivirus matches

URLs

⊘No Antivirus matches

Domains and IPs

Download Network PCAP: filtered – full

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
34.249.145.219	unknown	United States	16509	AMAZON-02US	false
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
34.249.145.219	most-arm5.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
	main_m68k.elf	Get hash	malicious	Mirai	Browse
	na.elf	Get hash	malicious	Prometei	Browse
	most-x86_64.elf	Get hash	malicious	Mirai	Browse
	na.elf	Get hash	malicious	Prometei	Browse
	na.elf	Get hash	malicious	Prometei	Browse
	na.elf	Get hash	malicious	Prometei	Browse
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	most-arm5.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
	main_x86.elf	Get hash	malicious	Mirai	Browse
	na.elf	Get hash	malicious	Prometei	Browse
	main_mips.elf	Get hash	malicious	Mirai	Browse
	main_m68k.elf	Get hash	malicious	Mirai	Browse
	main_mpsl.elf	Get hash	malicious	Mirai	Browse
	na.elf	Get hash	malicious	Prometei	Browse
91.189.91.42	most-arm5.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
	main_x86.elf	Get hash	malicious	Mirai	Browse
	na.elf	Get hash	malicious	Prometei	Browse
	main_mips.elf	Get hash	malicious	Mirai	Browse
	main_m68k.elf	Get hash	malicious	Mirai	Browse
	main_mpsl.elf	Get hash	malicious	Mirai	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	most-arm5.elf	Get hash	malicious	Unknown	Browse	91.189.91.42
	na.elf	Get hash	malicious	Prometei	Browse	91.189.91.42
	tftp.elf	Get hash	malicious	Unknown	Browse	185.125.190.26
	na.elf	Get hash	malicious	Prometei	Browse	91.189.91.42
	na.elf	Get hash	malicious	Prometei	Browse	91.189.91.42
	main_x86.elf	Get hash	malicious	Mirai	Browse	91.189.91.42
	main_ppc.elf	Get hash	malicious	Mirai	Browse	185.125.190.26
	na.elf	Get hash	malicious	Prometei	Browse	91.189.91.42
	main_mips.elf	Get hash	malicious	Mirai	Browse	91.189.91.42
	main_m68k.elf	Get hash	malicious	Mirai	Browse	91.189.91.42
CANONICAL-ASGB	most-arm5.elf	Get hash	malicious	Unknown	Browse	91.189.91.42
	na.elf	Get hash	malicious	Prometei	Browse	91.189.91.42
	tftp.elf	Get hash	malicious	Unknown	Browse	185.125.190.26
	na.elf	Get hash	malicious	Prometei	Browse	91.189.91.42
	na.elf	Get hash	malicious	Prometei	Browse	91.189.91.42
	main_x86.elf	Get hash	malicious	Mirai	Browse	91.189.91.42
	main_ppc.elf	Get hash	malicious	Mirai	Browse	185.125.190.26
	na.elf	Get hash	malicious	Prometei	Browse	91.189.91.42
	main_mips.elf	Get hash	malicious	Mirai	Browse	91.189.91.42
	main_m68k.elf	Get hash	malicious	Mirai	Browse	91.189.91.42
INIT7CH	most-arm5.elf	Get hash	malicious	Unknown	Browse	109.202.202.202
	na.elf	Get hash	malicious	Prometei	Browse	109.202.202.202
	na.elf	Get hash	malicious	Prometei	Browse	109.202.202.202
	na.elf	Get hash	malicious	Prometei	Browse	109.202.202.202
	main_x86.elf	Get hash	malicious	Mirai	Browse	109.202.202.202
	na.elf	Get hash	malicious	Prometei	Browse	109.202.202.202
	main_mips.elf	Get hash	malicious	Mirai	Browse	109.202.202.202
	main_m68k.elf	Get hash	malicious	Mirai	Browse	109.202.202.202
	main_mpsl.elf	Get hash	malicious	Mirai	Browse	109.202.202.202
	na.elf	Get hash	malicious	Prometei	Browse	109.202.202.202
AMAZON-02US	f_01ed3b	Get hash	malicious	Unknown	Browse	54.213.200.248
	most-arm5.elf	Get hash	malicious	Unknown	Browse	34.249.145.219
	https://personalinjuryhehe.eversign.com/document/fa37b4043dd04552b8cdfbfaa049dbbf-feca2a09aaa242c5b6a068e3a46fb7d1/sign	Get hash	malicious	HTMLPhisher, Invisible JS, Tycoon2FA	Browse	108.139.47.37
	na.elf	Get hash	malicious	Prometei	Browse	34.249.145.219
	na.elf	Get hash	malicious	Prometei	Browse	13.213.51.196
	OC-8563 PURCHASE ORDER.exe	Get hash	malicious	FormBook	Browse	13.248.169.48
	Revised - Ohio police & fire pension fund 2025 Handbook18663.doc	Get hash	malicious	HTMLPhisher, Invisible JS, Tycoon2FA	Browse	99.83.148.19
	na.elf	Get hash	malicious	Prometei	Browse	13.213.51.196
	https://forms.fillout.com/t/nQmGcyH7Hnus	Get hash	malicious	Unknown	Browse	13.35.93.107
	FA-43-02-2025.pdf	Get hash	malicious	Unknown	Browse	13.225.63.72

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):	5.6254127633477875
TrID:	ELF Executable and Linkable format (generic) (4004/1) 100.00%
File name:	most-arm6.elf
File size:	146'524 bytes
MD5:	5c5666bc417203a4f70218c88fc84df3
SHA1:	4ac267770edd85264ae769d3b7739dd8d627837e
SHA256:	0c499a0a944b9d28b259e55f4c5c3e5d6eaaeb6105f9b2c7f94b6c44fb93b319
SHA512:	e91b0dab6a74e897ca7dbffa234807c90fdd8ee11f02eb5005c613c72fbb204fa8f6ec9c9fe4123116b98128a49f1668da5ddcc28789755c8368f405899b8806
SSDEEP:	3072:Hqkn7VUXUAtwUZfXairOH3acuvFIJiKDVBwU:Kkn7ViLrfXxrOXaJbKDVBwU
TLSH:	AAE31B56F8819B12D5C111BAFE1E124E37131BB8E2DE72129D246F707B8B97B0E3B905
File Content Preview:	.ELF..............(.....T...4...T:......4. ...(......................................................G..x...........Q.td..................................-...L..................@-.,@...0....S..... 0....S.........../..0...0...@..../..9............-.@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:	146004
Section Header Size:	40
Number of Section Headers:	13
Header String Table Index:	12

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	0x1c974	0x0	0x6	AX	16
.fini	PROGBITS	0x24a24	0x1ca24	0x10	0x0	0x6	AX	4
.rodata	PROGBITS	0x24a38	0x1ca38	0x27b8	0x0	0x2	A	8
.init_array	INIT_ARRAY	0x2f1f4	0x1f1f8	0x8	0x0	0x3	WA	4
.fini_array	FINI_ARRAY	0x2f1fc	0x1f200	0x4	0x0	0x3	WA	4
.data.rel.ro	PROGBITS	0x2f204	0x1f208	0x78	0x0	0x3	WA	4
.got	PROGBITS	0x2f27c	0x1f280	0x11c	0x4	0x3	WA	4
.data	PROGBITS	0x2f3a0	0x1f3a4	0x4634	0x0	0x3	WA	32
.bss	NOBITS	0x339d8	0x239d8	0x4894	0x0	0x3	WA	8
.ARM.attributes	ARM_ATTRIBUTES	0x0	0x239d8	0x10	0x0	0x0		1
.shstrtab	STRTAB	0x0	0x239e8	0x6a	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	0x1f1f0	0x1f1f0	6.0893	0x5	R E	0x8000	.init .text .fini .rodata
LOAD	0x1f1f4	0x2f1f4	0x2f1f0	0x47e4	0x9078	0.4685	0x6	RW	0x8000	.init_array .fini_array .data.rel.ro .got .data .bss
GNU_STACK	0x0	0x0	0x0	0x0	0x0	0.0000	0x7	RWE	0x4

Network Behavior

Download Network PCAP: filtered – full

Network Port Distribution

Total Packets: 11
• 443 (HTTPS)
• 80 (HTTP)

TCP Packets

Timestamp	Source Port	Dest Port	Source IP	Dest IP
Apr 1, 2025 15:58:15.115717888 CEST	43928	443	192.168.2.23	91.189.91.42
Apr 1, 2025 15:58:20.746998072 CEST	42836	443	192.168.2.23	91.189.91.43
Apr 1, 2025 15:58:22.026849031 CEST	42516	80	192.168.2.23	109.202.202.202
Apr 1, 2025 15:58:28.636064053 CEST	39244	443	192.168.2.23	34.249.145.219
Apr 1, 2025 15:58:28.636105061 CEST	443	39244	34.249.145.219	192.168.2.23
Apr 1, 2025 15:58:28.636173010 CEST	39244	443	192.168.2.23	34.249.145.219
Apr 1, 2025 15:58:28.636373997 CEST	39244	443	192.168.2.23	34.249.145.219
Apr 1, 2025 15:58:28.636388063 CEST	443	39244	34.249.145.219	192.168.2.23
Apr 1, 2025 15:58:35.592924118 CEST	43928	443	192.168.2.23	91.189.91.42
Apr 1, 2025 15:58:47.879350901 CEST	42836	443	192.168.2.23	91.189.91.43
Apr 1, 2025 15:58:51.974683046 CEST	42516	80	192.168.2.23	109.202.202.202
Apr 1, 2025 15:59:16.547313929 CEST	43928	443	192.168.2.23	91.189.91.42
Apr 1, 2025 15:59:28.628782034 CEST	39244	443	192.168.2.23	34.249.145.219
Apr 1, 2025 15:59:28.672298908 CEST	443	39244	34.249.145.219	192.168.2.23
Apr 1, 2025 16:00:17.426671982 CEST	443	39244	34.249.145.219	192.168.2.23

System Behavior

Analysis Process: most-arm6.elf PID: 6253, Parent PID: 6175

General

Start time (UTC):	13:58:13
Start date (UTC):	01/04/2025
Path:	/tmp/most-arm6.elf
Arguments:	/tmp/most-arm6.elf
File size:	4956856 bytes
MD5 hash:	5ebfcae4fe2471fcc5695c2394773ff1

File Activities

File Opened

File Read

Process Activities

Signal Sent

Thread Sleep

System Activities

Query System Information (uname)

Chronological Activities

Analysis Process: dash PID: 6334, Parent PID: 4334

General

Start time (UTC):	13:59:27
Start date (UTC):	01/04/2025
Path:	/usr/bin/dash
Arguments:	-
File size:	129816 bytes
MD5 hash:	1e6b1c887c59a315edb7eb9a315fc84c

Process Activities

Process Overlayed (Exec)

Chronological Activities

Analysis Process: rm PID: 6334, Parent PID: 4334

General

Start time (UTC):	13:59:27
Start date (UTC):	01/04/2025
Path:	/usr/bin/rm
Arguments:	rm -f /tmp/tmp.RWeYhTIL7N /tmp/tmp.6WkesNl68g /tmp/tmp.04M14Izvlm
File size:	72056 bytes
MD5 hash:	aa2b5496fdbfd88e38791ab81f90b95b

File Activities

File Opened

File Deleted

File Read

Chronological Activities

Analysis Process: dash PID: 6335, Parent PID: 4334

General

Start time (UTC):	13:59:27
Start date (UTC):	01/04/2025
Path:	/usr/bin/dash
Arguments:	-
File size:	129816 bytes
MD5 hash:	1e6b1c887c59a315edb7eb9a315fc84c

Process Activities

Process Overlayed (Exec)

Chronological Activities

Analysis Process: rm PID: 6335, Parent PID: 4334

General

Start time (UTC):	13:59:27
Start date (UTC):	01/04/2025
Path:	/usr/bin/rm
Arguments:	rm -f /tmp/tmp.RWeYhTIL7N /tmp/tmp.6WkesNl68g /tmp/tmp.04M14Izvlm
File size:	72056 bytes
MD5 hash:	aa2b5496fdbfd88e38791ab81f90b95b

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 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 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 most-arm6.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

Spreading

Networking

System Summary

Persistence and Installation Behavior

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: most-arm6.elf PID: 6253, Parent PID: 6175

General

File Activities

File Opened

File Read

Process Activities

Signal Sent

Thread Sleep

System Activities

Query System Information (uname)

Chronological Activities

Analysis Process: dash PID: 6334, Parent PID: 4334

General

Process Activities

Process Overlayed (Exec)

Chronological Activities

Analysis Process: rm PID: 6334, Parent PID: 4334

General

File Activities

File Opened

File Deleted

Linux Analysis Report
most-arm6.elf