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Linux Analysis Report
earm7.elf

Overview

General Information

Sample name:	earm7.elf
Analysis ID:	1583100
MD5:	65f4b79b92bbe8977018a86a650d17d5
SHA1:	9d80b09f2baebed9ec393e457fb2f9a1a8620a41
SHA256:	d239d2ac6686479a97c024f360a0f95167387fa1af5875cb3f8844d57c27fb2f
Tags:	elfuser-abuse_ch
Infos:

Detection

Score:	48
Range:	0 - 100
Whitelisted:	false

Signatures

Multi AV Scanner detection for submitted file

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)

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

Classification

General Information

Joe Sandbox version:	41.0.0 Charoite
Analysis ID:	1583100
Start date and time:	2025-01-01 22:41:07 +01:00
Joe Sandbox product:	CloudBasic
Overall analysis duration:	0h 4m 21s
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:	earm7.elf
Detection:	MAL
Classification:	mal48.linELF@0/0@0/0

Runtime Messages

Command:	/tmp/earm7.elf
PID:	5440
Exit Code:	1
Exit Code Info:
Killed:	False
Standard Output:
Standard Error:

Process Tree

system is lnxubuntu20

dash New Fork (PID: 5415, Parent: 3581)

rm (PID: 5415, Parent: 3581, MD5: aa2b5496fdbfd88e38791ab81f90b95b) Arguments: rm -f /tmp/tmp.kAhAdEalK5 /tmp/tmp.QkKGMZ19Jf /tmp/tmp.4Ew5w6G4uy

dash New Fork (PID: 5416, Parent: 3581)

rm (PID: 5416, Parent: 3581, MD5: aa2b5496fdbfd88e38791ab81f90b95b) Arguments: rm -f /tmp/tmp.kAhAdEalK5 /tmp/tmp.QkKGMZ19Jf /tmp/tmp.4Ew5w6G4uy

earm7.elf (PID: 5440, Parent: 5346, MD5: 5ebfcae4fe2471fcc5695c2394773ff1) Arguments: /tmp/earm7.elf

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: earm7.elf

ReversingLabs: Detection: 13%

Source: global traffic

TCP traffic: 192.168.2.13:48202 -> 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 48202 -> 443

Source: ELF static info symbol of initial sample

.symtab present: no

Source: classification engine

Classification label: mal48.linELF@0/0@0/0

Source: /usr/bin/dash (PID: 5415)	Rm executable: /usr/bin/rm -> rm -f /tmp/tmp.kAhAdEalK5 /tmp/tmp.QkKGMZ19Jf /tmp/tmp.4Ew5w6G4uy			Jump to behavior
Source: /usr/bin/dash (PID: 5416)	Rm executable: /usr/bin/rm -> rm -f /tmp/tmp.kAhAdEalK5 /tmp/tmp.QkKGMZ19Jf /tmp/tmp.4Ew5w6G4uy			Jump to behavior

Source: /tmp/earm7.elf (PID: 5440)

Queries kernel information via 'uname':

Jump to behavior

Source: earm7.elf, 5440.1.000055815d009000.000055815d137000.rw-.sdmp	Binary or memory string: U!/etc/qemu-binfmt/arm
Source: earm7.elf, 5440.1.000055815d009000.000055815d137000.rw-.sdmp	Binary or memory string: /etc/qemu-binfmt/arm
Source: earm7.elf, 5440.1.00007fff24b6e000.00007fff24b8f000.rw-.sdmp	Binary or memory string: /usr/bin/qemu-arm
Source: earm7.elf, 5440.1.00007fff24b6e000.00007fff24b8f000.rw-.sdmp	Binary or memory string: x86_64/usr/bin/qemu-arm/tmp/earm7.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/earm7.elf

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	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
earm7.elf	13%	ReversingLabs	Linux.Backdoor.Mirai

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	arm.elf	Get hash	malicious	Unknown	Browse
	mpsl.elf	Get hash	malicious	Unknown	Browse
	boatnet.arm6.elf	Get hash	malicious	Mirai	Browse
	boatnet.sh4.elf	Get hash	malicious	Mirai	Browse
	garm5.elf	Get hash	malicious	Unknown	Browse
	chernobyl.i586.elf	Get hash	malicious	Mirai, Gafgyt	Browse
	POWERPC.elf	Get hash	malicious	Mirai	Browse
	MIPS.elf	Get hash	malicious	Mirai	Browse
	boatnet.mips.elf	Get hash	malicious	Mirai	Browse
	boatnet.spc.elf	Get hash	malicious	Mirai	Browse

Domains

⊘No context

ASNs

Match	Associated Sample Name / URL	SHA 256	Detection	Threat Name	Link	Context
CANONICAL-ASGB	nvebfe64.elf	Get hash	malicious	Mirai	Browse	91.189.91.42
	mips.elf	Get hash	malicious	Unknown	Browse	91.189.91.42
	arm.elf	Get hash	malicious	Unknown	Browse	185.125.190.26
	arm7.elf	Get hash	malicious	Mirai	Browse	91.189.91.42
	arm.elf	Get hash	malicious	Unknown	Browse	91.189.91.42
	mips.elf	Get hash	malicious	Unknown	Browse	91.189.91.42
	arm5.elf	Get hash	malicious	Unknown	Browse	91.189.91.42
	mpsl.elf	Get hash	malicious	Unknown	Browse	91.189.91.42
	loligang.m68k.elf	Get hash	malicious	Mirai	Browse	91.189.91.42
	Mozi.m.elf	Get hash	malicious	Unknown	Browse	91.189.91.42

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):	6.065626325302001
TrID:	ELF Executable and Linkable format (generic) (4004/1) 100.00%
File name:	earm7.elf
File size:	67'912 bytes
MD5:	65f4b79b92bbe8977018a86a650d17d5
SHA1:	9d80b09f2baebed9ec393e457fb2f9a1a8620a41
SHA256:	d239d2ac6686479a97c024f360a0f95167387fa1af5875cb3f8844d57c27fb2f
SHA512:	2b89ff7f3862ef963f2ae6b7c7aa44db0c811b6f44ea0d60cb843710c6278641cab3632f0862237e6f0c6169c62a0965b487947942e9d3c8b0c6227dc2e2ba50
SSDEEP:	1536:DFnlOiT27bOKEelXFXI4f7zyo8WkihUoHnNQ10UdlRPikP7Azmm:SNiK57fIWkihUoHnQnFPkim
TLSH:	5A63E64AFA819F11E5D922BEFE4F524D335317ACD3EF32069E115B247BC692B0B26901
File Content Preview:	.ELF..............(.........4...........4. ...(........p............................................0...0...............0...0...0........0..............4...4...4...................Q.td..................................-...L..................@-.,@...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:	0x8194
Flags:	0x4000002
ELF Header Size:	52
Program Header Offset:	52
Program Header Size:	32
Number of Program Headers:	5
Section Header Offset:	67272
Section Header Size:	40
Number of Section Headers:	16
Header String Table Index:	15

Sections

Name	Type	Address	Offset	Size	EntSize	Flags	Flags Description	Link	Align
	NULL	0x0	0x0	0x0	0x0	0x0		0	0
.init	PROGBITS	0x80d4	0xd4	0x10	0x0	0x6	AX	0	4
.text	PROGBITS	0x80f0	0xf0	0xf3d0	0x0	0x6	AX	0	16
.fini	PROGBITS	0x174c0	0xf4c0	0x10	0x0	0x6	AX	0	4
.rodata	PROGBITS	0x174d0	0xf4d0	0xe30	0x0	0x2	A	0	4
.ARM.extab	PROGBITS	0x18300	0x10300	0x18	0x0	0x2	A	0	4
.ARM.exidx	ARM_EXIDX	0x18318	0x10318	0x118	0x0	0x82	AL	2	4
.eh_frame	PROGBITS	0x20430	0x10430	0x4	0x0	0x3	WA	0	4
.tbss	NOBITS	0x20434	0x10434	0x8	0x0	0x403	WAT	0	4
.init_array	INIT_ARRAY	0x20434	0x10434	0x4	0x0	0x3	WA	0	4
.fini_array	FINI_ARRAY	0x20438	0x10438	0x4	0x0	0x3	WA	0	4
.got	PROGBITS	0x20440	0x10440	0xa8	0x4	0x3	WA	0	4
.data	PROGBITS	0x204e8	0x104e8	0x144	0x0	0x3	WA	0	4
.bss	NOBITS	0x2062c	0x1062c	0x2ee4	0x0	0x3	WA	0	4
.ARM.attributes	ARM_ATTRIBUTES	0x0	0x1062c	0x16	0x0	0x0		0	1
.shstrtab	STRTAB	0x0	0x10642	0x83	0x0	0x0		0	1

Program Segments

Type	Offset	Virtual Address	Physical Address	File Size	Memory Size	Entropy	Flags	Flags Description	Align	Section Mappings
EXIDX	0x10318	0x18318	0x18318	0x118	0x118	4.4416	0x4	R	0x4	.ARM.exidx
LOAD	0x0	0x8000	0x8000	0x10430	0x10430	6.0953	0x5	R E	0x8000	.init .text .fini .rodata .ARM.extab .ARM.exidx
LOAD	0x10430	0x20430	0x20430	0x1fc	0x30e0	2.4982	0x6	RW	0x8000	.eh_frame .tbss .init_array .fini_array .got .data .bss
TLS	0x10434	0x20434	0x20434	0x0	0x8	0.0000	0x4	R	0x4	.tbss
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
Jan 1, 2025 22:42:03.306236029 CET	48202	443	192.168.2.13	185.125.190.26
Jan 1, 2025 22:42:34.026102066 CET	48202	443	192.168.2.13	185.125.190.26

System Behavior

Analysis Process: dash PID: 5415, Parent PID: 3581

General

Start time (UTC):	21:41:46
Start date (UTC):	01/01/2025
Path:	/usr/bin/dash
Arguments:	-
File size:	129816 bytes
MD5 hash:	1e6b1c887c59a315edb7eb9a315fc84c

Chronological Activities

Analysis Process: rm PID: 5415, Parent PID: 3581

General

Start time (UTC):	21:41:46
Start date (UTC):	01/01/2025
Path:	/usr/bin/rm
Arguments:	rm -f /tmp/tmp.kAhAdEalK5 /tmp/tmp.QkKGMZ19Jf /tmp/tmp.4Ew5w6G4uy
File size:	72056 bytes
MD5 hash:	aa2b5496fdbfd88e38791ab81f90b95b

Chronological Activities

Analysis Process: dash PID: 5416, Parent PID: 3581

General

Start time (UTC):	21:41:46
Start date (UTC):	01/01/2025
Path:	/usr/bin/dash
Arguments:	-
File size:	129816 bytes
MD5 hash:	1e6b1c887c59a315edb7eb9a315fc84c

Chronological Activities

Analysis Process: rm PID: 5416, Parent PID: 3581

General

Start time (UTC):	21:41:46
Start date (UTC):	01/01/2025
Path:	/usr/bin/rm
Arguments:	rm -f /tmp/tmp.kAhAdEalK5 /tmp/tmp.QkKGMZ19Jf /tmp/tmp.4Ew5w6G4uy
File size:	72056 bytes
MD5 hash:	aa2b5496fdbfd88e38791ab81f90b95b

Chronological Activities

Analysis Process: earm7.elf PID: 5440, Parent PID: 5346

General

Start time (UTC):	21:41:49
Start date (UTC):	01/01/2025
Path:	/tmp/earm7.elf
Arguments:	/tmp/earm7.elf
File size:	4956856 bytes
MD5 hash:	5ebfcae4fe2471fcc5695c2394773ff1

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

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Linux Analysis Report earm7.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

Persistence and Installation Behavior

Malware Analysis System Evasion

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: 5415, Parent PID: 3581

General

Chronological Activities

Analysis Process: rm PID: 5415, Parent PID: 3581

General

Chronological Activities

Analysis Process: dash PID: 5416, Parent PID: 3581

General

Chronological Activities

Analysis Process: rm PID: 5416, Parent PID: 3581

General

Chronological Activities

Analysis Process: earm7.elf PID: 5440, Parent PID: 5346

General

Chronological Activities

Linux Analysis Report
earm7.elf