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Linux Analysis Report
gigab.arm5.elf

Overview

General Information

Sample name:	gigab.arm5.elf
Analysis ID:	1641090
MD5:	cdedb6e173aace93f8968069dcae4515
SHA1:	6c220de796c3ae9b91a274b8455c363ad47cf766
SHA256:	309db239b27594f1f25085bc2c7d86af70754ea3751c3f43ceeabf98465dd6c4
Tags:	elfuser-abuse_ch
Infos:

Detection

Score:	60
Range:	0 - 100

Signatures

Antivirus / Scanner detection for submitted sample

Multi AV Scanner detection for submitted file

Opens /proc/net/* files useful for finding connected devices and routers

Detected TCP or UDP traffic on non-standard ports

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

Classification

General Information

Joe Sandbox version:	42.0.0 Malachite
Analysis ID:	1641090
Start date and time:	2025-03-18 02:50:22 +01:00
Joe Sandbox product:	CloudBasic
Overall analysis duration:	0h 5m 3s
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:	gigab.arm5.elf
Detection:	MAL
Classification:	mal60.spre.linELF@0/0@2/0

Runtime Messages

Command:	/tmp/gigab.arm5.elf
PID:	5431
Exit Code:	0
Exit Code Info:
Killed:	False
Standard Output:
Standard Error:

Process Tree

system is lnxubuntu20

gigab.arm5.elf (PID: 5431, Parent: 5355, MD5: 5ebfcae4fe2471fcc5695c2394773ff1) Arguments: /tmp/gigab.arm5.elf

gigab.arm5.elf New Fork (PID: 5433, Parent: 5431)

gigab.arm5.elf New Fork (PID: 5435, Parent: 5433)

cleanup

Yara Signatures

⊘No yara matches

Suricata Signatures

⊘No Suricata rule has matched

Joe Sandbox Signatures

• AV Detection
• Spreading
• Networking
• System Summary
• Malware Analysis System Evasion

Click to jump to signature section

Show All Signature Results

AV Detection

Antivirus / Scanner detection for submitted sample

Source: gigab.arm5.elf

Avira: detected

Multi AV Scanner detection for submitted file

Source: gigab.arm5.elf

ReversingLabs: Detection: 41%

Spreading

Opens /proc/net/* files useful for finding connected devices and routers

Source: /tmp/gigab.arm5.elf (PID: 5431)

Opens: /proc/net/route

Jump to behavior

Source: global traffic

TCP traffic: 192.168.2.13:37998 -> 37.44.238.66:666

Source: unknown	TCP traffic detected without corresponding DNS query: 37.44.238.66
Source: unknown	TCP traffic detected without corresponding DNS query: 37.44.238.66
Source: unknown	TCP traffic detected without corresponding DNS query: 37.44.238.66
Source: unknown	TCP traffic detected without corresponding DNS query: 37.44.238.66
Source: unknown	TCP traffic detected without corresponding DNS query: 37.44.238.66
Source: unknown	TCP traffic detected without corresponding DNS query: 37.44.238.66
Source: unknown	TCP traffic detected without corresponding DNS query: 37.44.238.66
Source: unknown	TCP traffic detected without corresponding DNS query: 37.44.238.66
Source: unknown	TCP traffic detected without corresponding DNS query: 37.44.238.66
Source: unknown	TCP traffic detected without corresponding DNS query: 37.44.238.66
Source: unknown	TCP traffic detected without corresponding DNS query: 37.44.238.66
Source: unknown	UDP traffic detected without corresponding DNS query: 1.1.1.1
Source: unknown	UDP traffic detected without corresponding DNS query: 1.1.1.1

Source: global traffic

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

Source: classification engine

Classification label: mal60.spre.linELF@0/0@2/0

Source: /tmp/gigab.arm5.elf (PID: 5431)

Queries kernel information via 'uname':

Jump to behavior

Source: gigab.arm5.elf, 5431.1.0000563f0fd23000.0000563f0fe51000.rw-.sdmp, gigab.arm5.elf, 5433.1.0000563f0fd23000.0000563f0fe51000.rw-.sdmp	Binary or memory string: ?V!/etc/qemu-binfmt/arm
Source: gigab.arm5.elf, 5431.1.00007ffed9e31000.00007ffed9e52000.rw-.sdmp, gigab.arm5.elf, 5433.1.00007ffed9e31000.00007ffed9e52000.rw-.sdmp	Binary or memory string: x86_64/usr/bin/qemu-arm/tmp/gigab.arm5.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/gigab.arm5.elf
Source: gigab.arm5.elf, 5431.1.0000563f0fd23000.0000563f0fe51000.rw-.sdmp, gigab.arm5.elf, 5433.1.0000563f0fd23000.0000563f0fe51000.rw-.sdmp	Binary or memory string: /etc/qemu-binfmt/arm
Source: gigab.arm5.elf, 5431.1.00007ffed9e31000.00007ffed9e52000.rw-.sdmp, gigab.arm5.elf, 5433.1.00007ffed9e31000.00007ffed9e52000.rw-.sdmp	Binary or memory string: /usr/bin/qemu-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	Path Interception	Path Interception	Direct Volume Access	OS Credential Dumping	11 Security Software Discovery	Remote Services	Data from Local System	1 Non-Standard Port	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 Remote System Discovery	Remote Desktop Protocol	Data from Removable Media	1 Non-Application Layer Protocol	Exfiltration Over Bluetooth	Network Denial of Service
Email Addresses	DNS Server	Domain Accounts	At	Logon Script (Windows)	Logon Script (Windows)	Obfuscated Files or Information	Security Account Manager	Query Registry	SMB/Windows Admin Shares	Data from Network Shared Drive	1 Application Layer Protocol	Automated Exfiltration	Data Encrypted for Impact

Malware Configuration

⊘No configs have been found

Behavior Graph

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Legend:

Process
Signature
Created File
DNS/IP Info
Is Dropped
Number of created Files
Is malicious
Internet

Screenshots

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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
gigab.arm5.elf	42%	ReversingLabs	Linux.Backdoor.Gafgyt
gigab.arm5.elf	100%	Avira	LINUX/Gafgyt.opnd

Dropped Files

⊘No Antivirus matches

Domains

⊘No Antivirus matches

URLs

⊘No Antivirus matches

Domains and IPs

Download Network PCAP: filtered – full

Contacted Domains

Name	IP	Active	Malicious	Antivirus Detection	Reputation
daisy.ubuntu.com	162.213.35.25	true	false		high

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
37.44.238.66	unknown	France		49434	HARMONYHOSTING-ASFR	false

Joe Sandbox View / Context

IPs

Match	Associated Sample Name / URL	SHA 256	Detection	Threat Name	Link
37.44.238.66	gigab.mips.elf	Get hash	malicious	Unknown	Browse
	gigab.mips.elf	Get hash	malicious	Gafgyt	Browse
	gigab.spc.elf	Get hash	malicious	Gafgyt	Browse
	gigab.arm5.elf	Get hash	malicious	Gafgyt	Browse
	gigab.arm4.elf	Get hash	malicious	Gafgyt	Browse
	gigab.x86.elf	Get hash	malicious	Gafgyt	Browse
	gigab.ppc.elf	Get hash	malicious	Gafgyt	Browse
	gigab.sh4.elf	Get hash	malicious	Gafgyt	Browse
	gigab.arm4t.elf	Get hash	malicious	Gafgyt	Browse
	gigab.i686.elf	Get hash	malicious	Gafgyt	Browse

Domains

Match	Associated Sample Name / URL	SHA 256	Detection	Threat Name	Link	Context
daisy.ubuntu.com	sync.x86.elf	Get hash	malicious	Unknown	Browse	162.213.35.24
	resgod.x86.elf	Get hash	malicious	Mirai	Browse	162.213.35.24
	gigab.ppc.elf	Get hash	malicious	Unknown	Browse	162.213.35.25
	sshd.elf	Get hash	malicious	Unknown	Browse	162.213.35.24
	.i.elf	Get hash	malicious	Unknown	Browse	162.213.35.25
	.i.elf	Get hash	malicious	Unknown	Browse	162.213.35.24
	arm6.elf	Get hash	malicious	Unknown	Browse	162.213.35.24
	arm7.elf	Get hash	malicious	Mirai	Browse	162.213.35.25
	sshd.elf	Get hash	malicious	Unknown	Browse	162.213.35.25
	mips.elf	Get hash	malicious	Mirai	Browse	162.213.35.24

ASNs

Match	Associated Sample Name / URL	SHA 256	Detection	Threat Name	Link	Context
HARMONYHOSTING-ASFR	gigab.mips.elf	Get hash	malicious	Unknown	Browse	37.44.238.66
	l7vmra.elf	Get hash	malicious	Mirai	Browse	37.44.238.92
	gigab.mips.elf	Get hash	malicious	Gafgyt	Browse	37.44.238.66
	gigab.spc.elf	Get hash	malicious	Gafgyt	Browse	37.44.238.66
	gigab.arm5.elf	Get hash	malicious	Gafgyt	Browse	37.44.238.66
	gigab.arm4.elf	Get hash	malicious	Gafgyt	Browse	37.44.238.66
	gigab.x86.elf	Get hash	malicious	Gafgyt	Browse	37.44.238.66
	gigab.ppc.elf	Get hash	malicious	Gafgyt	Browse	37.44.238.66
	gigab.sh4.elf	Get hash	malicious	Gafgyt	Browse	37.44.238.66
	gigab.arm4t.elf	Get hash	malicious	Gafgyt	Browse	37.44.238.66

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, with debug_info, not stripped
Entropy (8bit):	5.83048850551615
TrID:	ELF Executable and Linkable format (generic) (4004/1) 100.00%
File name:	gigab.arm5.elf
File size:	140'191 bytes
MD5:	cdedb6e173aace93f8968069dcae4515
SHA1:	6c220de796c3ae9b91a274b8455c363ad47cf766
SHA256:	309db239b27594f1f25085bc2c7d86af70754ea3751c3f43ceeabf98465dd6c4
SHA512:	da25cc5f050b4b8bce879d9321b86b161efa12e6f36515ff9181edaf1bfd2b246adcadfa70b21f2777c5d03a283dcfaab96dfaf951bf0b071a3297943a5fb50f
SSDEEP:	3072:jj+Ya9CVjXAl6XbUhuN9HC2RwZV7qA/IcQYQDHO:eYa9CVjwlThuNFC2RwZV7NI4QDu
TLSH:	ABD31909D7404B57C1E2237AF7DB824933339B64A3E733159938ABF43BC2BA95E26115
File Content Preview:	.ELF..............(.........4...........4. ...(........p.^.......... ... ...........................8_..8_...............`...`...`...... t...............`...`...`..................Q.td..................................-...L..................G.F.G.F.G.F.G.

Network Behavior

Download Network PCAP: filtered – full

Network Port Distribution

Total Packets: 13
• 666 undefined
• 53 (DNS)

TCP Packets

Timestamp	Source Port	Dest Port	Source IP	Dest IP
Mar 18, 2025 02:51:09.083825111 CET	37998	666	192.168.2.13	37.44.238.66
Mar 18, 2025 02:51:09.088639975 CET	666	37998	37.44.238.66	192.168.2.13
Mar 18, 2025 02:51:09.088702917 CET	37998	666	192.168.2.13	37.44.238.66
Mar 18, 2025 02:51:09.089848042 CET	37998	666	192.168.2.13	37.44.238.66
Mar 18, 2025 02:51:09.094667912 CET	666	37998	37.44.238.66	192.168.2.13
Mar 18, 2025 02:51:11.392788887 CET	666	37998	37.44.238.66	192.168.2.13
Mar 18, 2025 02:51:11.392929077 CET	37998	666	192.168.2.13	37.44.238.66
Mar 18, 2025 02:51:11.541948080 CET	666	37998	37.44.238.66	192.168.2.13
Mar 18, 2025 02:51:11.542069912 CET	37998	666	192.168.2.13	37.44.238.66
Mar 18, 2025 02:52:11.455738068 CET	666	37998	37.44.238.66	192.168.2.13
Mar 18, 2025 02:52:11.455832958 CET	37998	666	192.168.2.13	37.44.238.66
Mar 18, 2025 02:52:11.605334997 CET	666	37998	37.44.238.66	192.168.2.13
Mar 18, 2025 02:52:11.605432987 CET	37998	666	192.168.2.13	37.44.238.66
Mar 18, 2025 02:53:11.415857077 CET	666	37998	37.44.238.66	192.168.2.13
Mar 18, 2025 02:53:11.416078091 CET	37998	666	192.168.2.13	37.44.238.66
Mar 18, 2025 02:53:11.575227976 CET	666	37998	37.44.238.66	192.168.2.13
Mar 18, 2025 02:53:11.575331926 CET	37998	666	192.168.2.13	37.44.238.66
Mar 18, 2025 02:54:11.428652048 CET	666	37998	37.44.238.66	192.168.2.13
Mar 18, 2025 02:54:11.428996086 CET	37998	666	192.168.2.13	37.44.238.66
Mar 18, 2025 02:54:11.576487064 CET	666	37998	37.44.238.66	192.168.2.13
Mar 18, 2025 02:54:11.576706886 CET	37998	666	192.168.2.13	37.44.238.66

UDP Packets

Timestamp	Source Port	Dest Port	Source IP	Dest IP
Mar 18, 2025 02:53:55.122515917 CET	51798	53	192.168.2.13	1.1.1.1
Mar 18, 2025 02:53:55.122647047 CET	45566	53	192.168.2.13	1.1.1.1
Mar 18, 2025 02:53:55.129199982 CET	53	45566	1.1.1.1	192.168.2.13
Mar 18, 2025 02:53:55.129684925 CET	53	51798	1.1.1.1	192.168.2.13

DNS Queries

Timestamp	Source IP	Dest IP	Trans ID	OP Code	Name	Type	Class	DNS over HTTPS
Mar 18, 2025 02:53:55.122515917 CET	192.168.2.13	1.1.1.1	0xbeaf	Standard query (0)	daisy.ubuntu.com	A (IP address)	IN (0x0001)	false
Mar 18, 2025 02:53:55.122647047 CET	192.168.2.13	1.1.1.1	0x88d0	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
Mar 18, 2025 02:53:55.129684925 CET	1.1.1.1	192.168.2.13	0xbeaf	No error (0)	daisy.ubuntu.com		162.213.35.25	A (IP address)	IN (0x0001)	false
Mar 18, 2025 02:53:55.129684925 CET	1.1.1.1	192.168.2.13	0xbeaf	No error (0)	daisy.ubuntu.com		162.213.35.24	A (IP address)	IN (0x0001)	false

System Behavior

Analysis Process: gigab.arm5.elf PID: 5431, Parent PID: 5355

General

Start time (UTC):	01:51:08
Start date (UTC):	18/03/2025
Path:	/tmp/gigab.arm5.elf
Arguments:	/tmp/gigab.arm5.elf
File size:	4956856 bytes
MD5 hash:	5ebfcae4fe2471fcc5695c2394773ff1

File Activities

File Opened

File Read

Process Activities

Process Forked

Thread Sleep

System Activities

Query System Information (uname)

Network Activities

Socket Connecting

Chronological Activities

Analysis Process: gigab.arm5.elf PID: 5433, Parent PID: 5431

General

Start time (UTC):	01:51:08
Start date (UTC):	18/03/2025
Path:	/tmp/gigab.arm5.elf
Arguments:	-
File size:	4956856 bytes
MD5 hash:	5ebfcae4fe2471fcc5695c2394773ff1

Process Activities

Process Forked

Thread Sleep

Chronological Activities

Analysis Process: gigab.arm5.elf PID: 5435, Parent PID: 5433

General

Start time (UTC):	01:51:08
Start date (UTC):	18/03/2025
Path:	/tmp/gigab.arm5.elf
Arguments:	-
File size:	4956856 bytes
MD5 hash:	5ebfcae4fe2471fcc5695c2394773ff1

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 attempt to get a listing of other systems by IP address, hostname, or other logical identifier on a network that may be used for Lateral Movement from the current system. Functionality could exist within remote access tools to enable this, but utilities available on the operating system could also be used such as Ping or `net view` using Net .
Tactics:	Discovery
Data Sources:	Command: Command Execution, File: File Access, Network Traffic: Network Connection Creation, Process: Process Creation
Platforms:	Linux, macOS, Network, Windows
Url:	Open detailed description by Mitre

Description:	Adversaries may communicate using a protocol and port pairing that are typically not associated. For example, HTTPS over port 8088or port 587as opposed to the traditional port 443. Adversaries may make changes to the standard port used by a protocol to bypass filtering or muddle analysis/parsing of network data.
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

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 gigab.arm5.elf

Overview

General Information

Detection

Signatures

Classification

General Information

Runtime Messages

Process Tree

Yara Signatures

Suricata Signatures

Joe Sandbox Signatures

AV Detection

Spreading

Networking

System Summary

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

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

Network Behavior

Network Port Distribution

TCP Packets

UDP Packets

DNS Queries

DNS Answers

System Behavior

Analysis Process: gigab.arm5.elf PID: 5431, Parent PID: 5355

General

File Activities

File Opened

File Read

Process Activities

Process Forked

Thread Sleep

System Activities

Query System Information (uname)

Network Activities

Socket Connecting

Chronological Activities

Analysis Process: gigab.arm5.elf PID: 5433, Parent PID: 5431

General

Process Activities

Process Forked

Thread Sleep

Chronological Activities

Analysis Process: gigab.arm5.elf PID: 5435, Parent PID: 5433

General

Process Activities

Thread Sleep

Network Activities

Socket Connecting

Chronological Activities

Linux Analysis Report
gigab.arm5.elf