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Linux Analysis Report
.Sarm6.elf

Overview

General Information

Sample name:	.Sarm6.elf
Analysis ID:	1582185
MD5:	38b971a97da83be98d6e908b3fd551f9
SHA1:	d6703c427af958bd63aba8e90e3ff72c6b4c5739
SHA256:	0865ed8bbba445e411ff0e67ff905dde05441ef60f5d064f5ee2b699f99a901c
Tags:	elfMiraiuser-abuse_ch
Infos:

Detection

Score:	52
Range:	0 - 100
Whitelisted:	false

Signatures

Multi AV Scanner detection for submitted file

Sample is packed with UPX

ELF contains segments with high entropy indicating compressed/encrypted content

Executes the "systemctl" command used for controlling the systemd system and service manager

Reads system version information

Sample contains only a LOAD segment without any section mappings

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

Classification

General Information

Joe Sandbox version:	41.0.0 Charoite
Analysis ID:	1582185
Start date and time:	2024-12-30 03:38:29 +01:00
Joe Sandbox product:	CloudBasic
Overall analysis duration:	0h 5m 12s
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:	.Sarm6.elf
Detection:	MAL
Classification:	mal52.evad.linELF@0/0@2/0

Runtime Messages

Command:	/tmp/.Sarm6.elf
PID:	5716
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

.Sarm6.elf (PID: 5716, Parent: 5523, MD5: 5ebfcae4fe2471fcc5695c2394773ff1) Arguments: /tmp/.Sarm6.elf

systemd New Fork (PID: 5786, Parent: 1)

snap-failure (PID: 5786, Parent: 1, MD5: 69136a7d575731ce62349f2e4d3e5c36) Arguments: /usr/lib/snapd/snap-failure snapd

snap-failure New Fork (PID: 5804, Parent: 5786)

systemctl (PID: 5804, Parent: 5786, MD5: 4deddfb6741481f68aeac522cc26ff4b) Arguments: systemctl stop snapd.socket

snap-failure New Fork (PID: 5805, Parent: 5786)

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: .Sarm6.elf	ReversingLabs: Detection: 26%
Source: .Sarm6.elf	Virustotal: Detection: 30%			Perma Link

Source: global traffic

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

Source: .Sarm6.elf

String found in binary or memory: http://upx.sf.net

Source: LOAD without section mappings

Program segment: 0x8000

Source: classification engine

Classification label: mal52.evad.linELF@0/0@2/0

Data Obfuscation

Sample is packed with UPX

Source: initial sample	String containing UPX found: $Info: This file is packed with the UPX executable packer http://upx.sf.net $
Source: initial sample	String containing UPX found: $Info: This file is packed with the UPX executable packer http://upx.sf.net $
Source: initial sample	String containing UPX found: $Id: UPX 3.94 Copyright (C) 1996-2017 the UPX Team. All Rights Reserved. $

Source: /usr/lib/snapd/snap-failure (PID: 5804)

Systemctl executable: /usr/bin/systemctl -> systemctl stop snapd.socket

Jump to behavior

Source: /usr/lib/snapd/snap-failure (PID: 5786)

Reads version info: /proc/version

Jump to behavior

Source: .Sarm6.elf

Submission file: segment LOAD with 7.9644 entropy (max. 8.0)

Source: /tmp/.Sarm6.elf (PID: 5716)

Queries kernel information via 'uname':

Jump to behavior

Source: .Sarm6.elf, 5716.1.00007fff7775d000.00007fff7777e000.rw-.sdmp	Binary or memory string: x86_64/usr/bin/qemu-arm/tmp/.Sarm6.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/.Sarm6.elf
Source: .Sarm6.elf, 5716.1.0000563488368000.0000563488536000.rw-.sdmp	Binary or memory string: /etc/qemu-binfmt/arm
Source: .Sarm6.elf, 5716.1.00007fff7775d000.00007fff7777e000.rw-.sdmp	Binary or memory string: /usr/bin/qemu-arm
Source: .Sarm6.elf, 5716.1.00007fff7775d000.00007fff7777e000.rw-.sdmp	Binary or memory string: qemu: uncaught target signal 11 (Segmentation fault) - core dumped
Source: .Sarm6.elf, 5716.1.0000563488368000.0000563488536000.rw-.sdmp	Binary or memory string: 4V!/etc/qemu-binfmt/arm

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	1 Systemd Service	1 Systemd Service	11 Obfuscated Files or Information	OS Credential Dumping	11 Security Software Discovery	Remote Services	Data from Local System	1 Non-Application Layer Protocol	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	1 System Information 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

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

Source	Detection	Scanner	Label	Link
.Sarm6.elf	26%	ReversingLabs	Linux.Trojan.Mirai
.Sarm6.elf	30%	Virustotal		Browse

Dropped Files

⊘No Antivirus matches

Domains

⊘No Antivirus matches

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		high

URLs from Memory and Binaries

Name	Source	Malicious	Antivirus Detection	Reputation
http://upx.sf.net	.Sarm6.elf	false		high

World Map of Contacted IPs

⊘No contacted IP infos

Joe Sandbox View / Context

IPs

⊘No context

Domains

Match	Associated Sample Name / URL	SHA 256	Detection	Threat Name	Link	Context
daisy.ubuntu.com	arm5.elf	Get hash	malicious	Unknown	Browse	162.213.35.24
	woega6.elf	Get hash	malicious	Mirai	Browse	162.213.35.25
	rebirth.arm5.elf	Get hash	malicious	Gafgyt	Browse	162.213.35.24
	rebirth.x86.elf	Get hash	malicious	Gafgyt	Browse	162.213.35.25
	ppc.elf	Get hash	malicious	Unknown	Browse	162.213.35.24
	rebirth.ppc.elf	Get hash	malicious	Gafgyt	Browse	162.213.35.24
	mips.elf	Get hash	malicious	Unknown	Browse	162.213.35.24
	zmap.x86_64.elf	Get hash	malicious	Okiru	Browse	162.213.35.24
	rebirth.arm6.elf	Get hash	malicious	Gafgyt	Browse	162.213.35.24

ASNs

⊘No context

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 (GNU/Linux), statically linked, no section header
Entropy (8bit):	7.962031385529255
TrID:	ELF Executable and Linkable format (generic) (4004/1) 100.00%
File name:	.Sarm6.elf
File size:	36'132 bytes
MD5:	38b971a97da83be98d6e908b3fd551f9
SHA1:	d6703c427af958bd63aba8e90e3ff72c6b4c5739
SHA256:	0865ed8bbba445e411ff0e67ff905dde05441ef60f5d064f5ee2b699f99a901c
SHA512:	6bda823929512667b458dd20016bf8a52b949b608b53a0ac80b6f37db87ffd056a423dfb5132afe75c17f44094e7f2f1bf49bff444d3d211299be6041fdea1ae
SSDEEP:	768:piSHDg4TG7PD0cJuImKsf6FI/fBuLVz9q3UELFC:pBHDgQYPtmdfb3BuLVyLc
TLSH:	1CF2F1A4B925F4F2DC7478BAFA2F87872F16C97CA4E6B5055A74060828D31C30BEC443
File Content Preview:	.ELF..............(.........4...........4. ...(..........................................X..........................Q.td............................>. NUPX!.........5...5......T..........?.E.h;....#..$..1)......OY...Yo.#.........\...{H.2.<N.&P.a.B.O..~5..

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 - Linux
ABI Version:	0
Entry Point Address:	0xfa00
Flags:	0x4000002
ELF Header Size:	52
Program Header Offset:	52
Program Header Size:	32
Number of Program Headers:	3
Section Header Offset:	0
Section Header Size:	40
Number of Section Headers:	0
Header String Table Index:	0

Program Segments

Type	Offset	Virtual Address	Physical Address	File Size	Memory Size	Entropy	Flags	Flags Description	Align
LOAD	0x0	0x8000	0x8000	0x8bed	0x8bed	7.9644	0x5	R E	0x8000
LOAD	0x58dc	0x2d8dc	0x2d8dc	0x0	0x0	0.0000	0x6	RW	0x8000
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
Dec 30, 2024 03:40:05.542469978 CET	34800	53	192.168.2.13	8.8.8.8
Dec 30, 2024 03:40:05.547317028 CET	53	34800	8.8.8.8	192.168.2.13
Dec 30, 2024 03:40:05.547379017 CET	34800	53	192.168.2.13	8.8.8.8
Dec 30, 2024 03:40:05.547399044 CET	34800	53	192.168.2.13	8.8.8.8
Dec 30, 2024 03:40:05.547436953 CET	34800	53	192.168.2.13	8.8.8.8
Dec 30, 2024 03:40:05.552299023 CET	53	34800	8.8.8.8	192.168.2.13
Dec 30, 2024 03:40:05.552308083 CET	53	34800	8.8.8.8	192.168.2.13
Dec 30, 2024 03:40:05.971303940 CET	53	34800	8.8.8.8	192.168.2.13
Dec 30, 2024 03:40:05.971422911 CET	34800	53	192.168.2.13	8.8.8.8
Dec 30, 2024 03:40:06.094168901 CET	53	34800	8.8.8.8	192.168.2.13
Dec 30, 2024 03:40:06.094345093 CET	34800	53	192.168.2.13	8.8.8.8
Dec 30, 2024 03:40:07.971415043 CET	53	34800	8.8.8.8	192.168.2.13
Dec 30, 2024 03:40:07.971951008 CET	34800	53	192.168.2.13	8.8.8.8
Dec 30, 2024 03:40:07.976814032 CET	53	34800	8.8.8.8	192.168.2.13

DNS Queries

Timestamp	Source IP	Dest IP	Trans ID	OP Code	Name	Type	Class	DNS over HTTPS
Dec 30, 2024 03:40:05.547399044 CET	192.168.2.13	8.8.8.8	0xb704	Standard query (0)	daisy.ubuntu.com	A (IP address)	IN (0x0001)	false
Dec 30, 2024 03:40:05.547436953 CET	192.168.2.13	8.8.8.8	0x1dba	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
Dec 30, 2024 03:40:06.094168901 CET	8.8.8.8	192.168.2.13	0xb704	No error (0)	daisy.ubuntu.com		162.213.35.25	A (IP address)	IN (0x0001)	false
Dec 30, 2024 03:40:06.094168901 CET	8.8.8.8	192.168.2.13	0xb704	No error (0)	daisy.ubuntu.com		162.213.35.24	A (IP address)	IN (0x0001)	false

System Behavior

Analysis Process: .Sarm6.elf PID: 5716, Parent PID: 5523

General

Start time (UTC):	02:40:03
Start date (UTC):	30/12/2024
Path:	/tmp/.Sarm6.elf
Arguments:	/tmp/.Sarm6.elf
File size:	4956856 bytes
MD5 hash:	5ebfcae4fe2471fcc5695c2394773ff1

Chronological Activities

Analysis Process: systemd PID: 5786, Parent PID: 1

General

Start time (UTC):	02:40:44
Start date (UTC):	30/12/2024
Path:	/usr/lib/systemd/systemd
Arguments:	-
File size:	1620224 bytes
MD5 hash:	9b2bec7092a40488108543f9334aab75

Chronological Activities

Analysis Process: snap-failure PID: 5786, Parent PID: 1

General

Start time (UTC):	02:40:44
Start date (UTC):	30/12/2024
Path:	/usr/lib/snapd/snap-failure
Arguments:	/usr/lib/snapd/snap-failure snapd
File size:	4764904 bytes
MD5 hash:	69136a7d575731ce62349f2e4d3e5c36

Chronological Activities

Analysis Process: snap-failure PID: 5804, Parent PID: 5786

General

Start time (UTC):	02:40:44
Start date (UTC):	30/12/2024
Path:	/usr/lib/snapd/snap-failure
Arguments:	-
File size:	4764904 bytes
MD5 hash:	69136a7d575731ce62349f2e4d3e5c36

Chronological Activities

Analysis Process: systemctl PID: 5804, Parent PID: 5786

General

Start time (UTC):	02:40:44
Start date (UTC):	30/12/2024
Path:	/usr/bin/systemctl
Arguments:	systemctl stop snapd.socket
File size:	996584 bytes
MD5 hash:	4deddfb6741481f68aeac522cc26ff4b

Chronological Activities

Analysis Process: snap-failure PID: 5805, Parent PID: 5786

General

Start time (UTC):	02:40:44
Start date (UTC):	30/12/2024
Path:	/usr/lib/snapd/snap-failure
Arguments:	-
File size:	4764904 bytes
MD5 hash:	69136a7d575731ce62349f2e4d3e5c36

Description:	Adversaries may create or modify systemd services to repeatedly execute malicious payloads as part of persistence. Systemd is a system and service manager commonly used for managing background daemon processes (also known as services) and other system resources.Systemd is the default initialization (init) system on many Linux distributions replacing legacy init systems, including SysVinit and Upstart, while remaining backwards compatible.
Tactics:	Persistence, Privilege Escalation
Data Sources:	Command: Command Execution, File: File Creation, File: File Modification, Process: Process Creation, Service: Service Creation, Service: Service Modification
Platforms:	Linux
Url:	Open detailed description by Mitre

Description:	Adversaries may attempt to make an executable or file difficult to discover or analyze by encrypting, encoding, or otherwise obfuscating its contents on the system or in transit. This is common behavior that can be used across different platforms and the network to evade defenses.
Tactics:	Defense Evasion
Data Sources:	Command: Command Execution, File: File Creation, File: File Metadata, Module: Module Load, Process: OS API Execution, Process: Process Creation, Script: Script Execution, WMI: WMI Creation, Windows Registry: Windows Registry Key Creation
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:	An adversary may attempt to get detailed information about the operating system and hardware, including version, patches, hotfixes, service packs, and architecture. Adversaries may use the information from System Information 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, Process: OS API Execution, Process: Process Creation
Platforms:	IaaS, Linux, macOS, Network, 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

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Linux Analysis Report .Sarm6.elf

Overview

General Information

Detection

Signatures

Classification

General Information

Runtime Messages

Process Tree

Yara Signatures

Suricata Signatures

Joe Sandbox Signatures

AV Detection

Networking

System Summary

Data Obfuscation

Persistence and Installation Behavior

Hooking and other Techniques for Hiding and Protection

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

URLs from Memory and Binaries

World Map of Contacted IPs

Joe Sandbox View / Context

IPs

Domains

ASNs

JA3 Fingerprints

Dropped Files

Created / dropped Files

Static File Info

General

Static ELF Info

ELF header

Program Segments

Network Behavior

Network Port Distribution

TCP Packets

DNS Queries

DNS Answers

System Behavior

Analysis Process: .Sarm6.elf PID: 5716, Parent PID: 5523

General

Chronological Activities

Analysis Process: systemd PID: 5786, Parent PID: 1

General

Chronological Activities

Analysis Process: snap-failure PID: 5786, Parent PID: 1

General

Chronological Activities

Analysis Process: snap-failure PID: 5804, Parent PID: 5786

General

Chronological Activities

Analysis Process: systemctl PID: 5804, Parent PID: 5786

General

Chronological Activities

Analysis Process: snap-failure PID: 5805, Parent PID: 5786

General

Chronological Activities

Linux Analysis Report
.Sarm6.elf