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Linux Analysis Report
tftp.elf

Overview

General Information

Sample name:	tftp.elf
Analysis ID:	1668992
MD5:	a3ab7e62b0bd2d6efa7a4897de3c403f
SHA1:	30c4cfa6ce2a7bdb5c051ad5a01be391eff762f2
SHA256:	b5c27e4e16ecd8b317540374ad1f3a75b8dd21f5e9628fb6c814aadaa546353b
Tags:	elfuser-abuse_ch
Infos:

Detection

Score:	48
Range:	0 - 100

Signatures

Multi AV Scanner detection for submitted file

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

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

Classification

General Information

Joe Sandbox version:	42.0.0 Malachite
Analysis ID:	1668992
Start date and time:	2025-04-19 03:39:33 +02:00
Joe Sandbox product:	CloudBasic
Overall analysis duration:	0h 4m 33s
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:	tftp.elf
Detection:	MAL
Classification:	mal48.linELF@0/0@0/0

Runtime Messages

Command:	/tmp/tftp.elf
PID:	6234
Exit Code:	135
Exit Code Info:
Killed:	False
Standard Output:
Standard Error:

Process Tree

system is lnxubuntu20

tftp.elf (PID: 6234, Parent: 6159, MD5: 5ebfcae4fe2471fcc5695c2394773ff1) Arguments: /tmp/tftp.elf

dash New Fork (PID: 6314, Parent: 4336)

rm (PID: 6314, Parent: 4336, MD5: aa2b5496fdbfd88e38791ab81f90b95b) Arguments: rm -f /tmp/tmp.OGgumjUYWx /tmp/tmp.4dxlHcGEqS /tmp/tmp.pynADpsMy4

dash New Fork (PID: 6315, Parent: 4336)

rm (PID: 6315, Parent: 4336, MD5: aa2b5496fdbfd88e38791ab81f90b95b) Arguments: rm -f /tmp/tmp.OGgumjUYWx /tmp/tmp.4dxlHcGEqS /tmp/tmp.pynADpsMy4

cleanup

Yara Signatures

⊘No yara matches

Suricata Signatures

⊘No Suricata rule has matched

Joe Sandbox Signatures

• AV Detection
• Networking
• System Summary
• Persistence and Installation Behavior
• Malware Analysis System Evasion

Click to jump to signature section

Show All Signature Results

AV Detection

Multi AV Scanner detection for submitted file

Source: tftp.elf	Virustotal: Detection: 21%			Perma Link
Source: tftp.elf	ReversingLabs: Detection: 19%

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	TCP traffic detected without corresponding DNS query: 91.189.91.43

Source: unknown	Network traffic detected: HTTP traffic on port 39246 -> 443
Source: unknown	Network traffic detected: HTTP traffic on port 43928 -> 443
Source: unknown	Network traffic detected: HTTP traffic on port 443 -> 39246
Source: unknown	Network traffic detected: HTTP traffic on port 42836 -> 443

Source: classification engine

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

Source: /usr/bin/dash (PID: 6314)	Rm executable: /usr/bin/rm -> rm -f /tmp/tmp.OGgumjUYWx /tmp/tmp.4dxlHcGEqS /tmp/tmp.pynADpsMy4			Jump to behavior
Source: /usr/bin/dash (PID: 6315)	Rm executable: /usr/bin/rm -> rm -f /tmp/tmp.OGgumjUYWx /tmp/tmp.4dxlHcGEqS /tmp/tmp.pynADpsMy4			Jump to behavior

Source: /tmp/tftp.elf (PID: 6234)

Queries kernel information via 'uname':

Jump to behavior

Source: tftp.elf, 6234.1.00005560ee95d000.00005560eea69000.rw-.sdmp	Binary or memory string: `U!/etc/qemu-binfmt/arm
Source: tftp.elf, 6234.1.00007fff6ef68000.00007fff6ef89000.rw-.sdmp	Binary or memory string: &+x86_64/usr/bin/qemu-arm/tmp/tftp.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/tftp.elf
Source: tftp.elf, 6234.1.00005560ee95d000.00005560eea69000.rw-.sdmp	Binary or memory string: /etc/qemu-binfmt/arm
Source: tftp.elf, 6234.1.00007fff6ef68000.00007fff6ef89000.rw-.sdmp	Binary or memory string: /usr/bin/qemu-arm
Source: tftp.elf, 6234.1.00005560ee95d000.00005560eea69000.rw-.sdmp	Binary or memory string: rg.qemu.gdb.arm.sys.regs">
Source: tftp.elf, 6234.1.00005560ee95d000.00005560eea69000.rw-.sdmp	Binary or memory string: `Urg.qemu.gdb.arm.sys.regs">

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
tftp.elf	21%	Virustotal		Browse
tftp.elf	19%	ReversingLabs	Linux.Trojan.Multiverze

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	na.elf	Get hash	malicious	Prometei	Browse
	xd.x86_64.elf	Get hash	malicious	Unknown	Browse
	vision.ppc.elf	Get hash	malicious	Mirai	Browse
	vision.arm.elf	Get hash	malicious	Mirai	Browse
	vision.arc.elf	Get hash	malicious	Mirai	Browse
	meihao.arm7.elf	Get hash	malicious	Unknown	Browse
	boatnet.mips.elf	Get hash	malicious	Mirai	Browse
	boatnet.arm5.elf	Get hash	malicious	Mirai	Browse
	.Sarm7.elf	Get hash	malicious	Mirai	Browse
	meihao.arm6.elf	Get hash	malicious	Mirai	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	na.elf	Get hash	malicious	Prometei	Browse
	na.elf	Get hash	malicious	Prometei	Browse
	na.elf	Get hash	malicious	Prometei	Browse
	na.elf	Get hash	malicious	Prometei	Browse
	na.elf	Get hash	malicious	Prometei	Browse
	na.elf	Get hash	malicious	Prometei	Browse
	na.elf	Get hash	malicious	Prometei	Browse
	vision.ppc.elf	Get hash	malicious	Mirai	Browse
	vision.arm6.elf	Get hash	malicious	Mirai	Browse
	vision.i686.elf	Get hash	malicious	Mirai	Browse
91.189.91.42	na.elf	Get hash	malicious	Prometei	Browse
	na.elf	Get hash	malicious	Prometei	Browse
	na.elf	Get hash	malicious	Prometei	Browse
	na.elf	Get hash	malicious	Prometei	Browse
	na.elf	Get hash	malicious	Prometei	Browse
	na.elf	Get hash	malicious	Prometei	Browse
	na.elf	Get hash	malicious	Prometei	Browse
	xd.x86_64.elf	Get hash	malicious	Unknown	Browse
	vision.ppc.elf	Get hash	malicious	Mirai	Browse
	vision.arm6.elf	Get hash	malicious	Mirai	Browse

Domains

⊘No context

ASNs

Match	Associated Sample Name / URL	SHA 256	Detection	Threat Name	Link	Context
CANONICAL-ASGB	na.elf	Get hash	malicious	Prometei	Browse	91.189.91.42
	na.elf	Get hash	malicious	Prometei	Browse	91.189.91.42
	na.elf	Get hash	malicious	Prometei	Browse	91.189.91.42
	na.elf	Get hash	malicious	Prometei	Browse	91.189.91.42
	na.elf	Get hash	malicious	Prometei	Browse	91.189.91.42
	na.elf	Get hash	malicious	Prometei	Browse	91.189.91.42
	na.elf	Get hash	malicious	Prometei	Browse	91.189.91.42
	xd.x86_64.elf	Get hash	malicious	Unknown	Browse	91.189.91.42
	vision.ppc.elf	Get hash	malicious	Mirai	Browse	91.189.91.42
	xd.arc.elf	Get hash	malicious	Unknown	Browse	185.125.190.26
CANONICAL-ASGB	na.elf	Get hash	malicious	Prometei	Browse	91.189.91.42
	na.elf	Get hash	malicious	Prometei	Browse	91.189.91.42
	na.elf	Get hash	malicious	Prometei	Browse	91.189.91.42
	na.elf	Get hash	malicious	Prometei	Browse	91.189.91.42
	na.elf	Get hash	malicious	Prometei	Browse	91.189.91.42
	na.elf	Get hash	malicious	Prometei	Browse	91.189.91.42
	na.elf	Get hash	malicious	Prometei	Browse	91.189.91.42
	xd.x86_64.elf	Get hash	malicious	Unknown	Browse	91.189.91.42
	vision.ppc.elf	Get hash	malicious	Mirai	Browse	91.189.91.42
	xd.arc.elf	Get hash	malicious	Unknown	Browse	185.125.190.26
INIT7CH	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
	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
	na.elf	Get hash	malicious	Prometei	Browse	109.202.202.202
	xd.x86_64.elf	Get hash	malicious	Unknown	Browse	109.202.202.202
	vision.ppc.elf	Get hash	malicious	Mirai	Browse	109.202.202.202
	vision.arm6.elf	Get hash	malicious	Mirai	Browse	109.202.202.202
AMAZON-02US	na.elf	Get hash	malicious	Prometei	Browse	54.170.242.139
	na.elf	Get hash	malicious	Prometei	Browse	34.249.145.219
	na.elf	Get hash	malicious	Prometei	Browse	54.170.242.139
	na.elf	Get hash	malicious	Prometei	Browse	54.170.242.139
	xd.x86_64.elf	Get hash	malicious	Unknown	Browse	34.249.145.219
	vision.ppc.elf	Get hash	malicious	Mirai	Browse	34.249.145.219
	vision.mpsl.elf	Get hash	malicious	Mirai	Browse	54.171.230.55
	na.elf	Get hash	malicious	Prometei	Browse	54.170.242.139
	vision.arm.elf	Get hash	malicious	Mirai	Browse	34.249.145.219
	vision.arc.elf	Get hash	malicious	Mirai	Browse	34.249.145.219

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, EABI5 version 1 (SYSV), dynamically linked, interpreter /lib/ld-linux.so.3, missing section headers at 381572
Entropy (8bit):	6.00964955357414
TrID:	ELF Executable and Linkable format (generic) (4004/1) 100.00%
File name:	tftp.elf
File size:	102'400 bytes
MD5:	a3ab7e62b0bd2d6efa7a4897de3c403f
SHA1:	30c4cfa6ce2a7bdb5c051ad5a01be391eff762f2
SHA256:	b5c27e4e16ecd8b317540374ad1f3a75b8dd21f5e9628fb6c814aadaa546353b
SHA512:	14f001e809cb17b748769e7078415a6fd901def87c046112cb261a7bb2da601a77f3cbea9f8d02a553ec2e10434e970facf5b02af906a017aa4e2934edeed229
SSDEEP:	3072:9LOuh02xHCKQnqZ9YfMXKgyLlBZSyPj5zZC:FOuhPHCKsqZ9YfM6g23ZJLhZC
TLSH:	DFA30A96F8A28B56C4C557B7FB4FC75637231795E3DF36038A184E34278B50A8E3AA01
File Content Preview:	.ELF..............(.........4...........4. ...(........p.....+...+......................4...4...4...@...@...............t...t...t..............................................................................................................................

Network Behavior

Download Network PCAP: filtered – full

Network Port Distribution

Total Packets: 12
• 443 (HTTPS)
• 80 (HTTP)

TCP Packets

Timestamp	Source Port	Dest Port	Source IP	Dest IP
Apr 19, 2025 03:40:22.988540888 CEST	43928	443	192.168.2.23	91.189.91.42
Apr 19, 2025 03:40:28.363807917 CEST	42836	443	192.168.2.23	91.189.91.43
Apr 19, 2025 03:40:29.387619019 CEST	42516	80	192.168.2.23	109.202.202.202
Apr 19, 2025 03:40:41.423721075 CEST	39246	443	192.168.2.23	34.249.145.219
Apr 19, 2025 03:40:41.423751116 CEST	443	39246	34.249.145.219	192.168.2.23
Apr 19, 2025 03:40:41.423993111 CEST	39246	443	192.168.2.23	34.249.145.219
Apr 19, 2025 03:40:41.424535036 CEST	39246	443	192.168.2.23	34.249.145.219
Apr 19, 2025 03:40:41.424545050 CEST	443	39246	34.249.145.219	192.168.2.23
Apr 19, 2025 03:40:44.233628988 CEST	43928	443	192.168.2.23	91.189.91.42
Apr 19, 2025 03:40:54.472143888 CEST	42836	443	192.168.2.23	91.189.91.43
Apr 19, 2025 03:41:00.615310907 CEST	42516	80	192.168.2.23	109.202.202.202
Apr 19, 2025 03:41:25.188585997 CEST	43928	443	192.168.2.23	91.189.91.42
Apr 19, 2025 03:41:41.416095018 CEST	39246	443	192.168.2.23	34.249.145.219
Apr 19, 2025 03:41:41.456271887 CEST	443	39246	34.249.145.219	192.168.2.23
Apr 19, 2025 03:41:45.665115118 CEST	42836	443	192.168.2.23	91.189.91.43
Apr 19, 2025 03:42:23.579917908 CEST	443	39246	34.249.145.219	192.168.2.23

System Behavior

Analysis Process: tftp.elf PID: 6234, Parent PID: 6159

General

Start time (UTC):	01:40:20
Start date (UTC):	19/04/2025
Path:	/tmp/tftp.elf
Arguments:	/tmp/tftp.elf
File size:	4956856 bytes
MD5 hash:	5ebfcae4fe2471fcc5695c2394773ff1

File Activities

File Opened

File Read

Process Activities

Thread Sleep

System Activities

Query System Information (uname)

Chronological Activities

Analysis Process: dash PID: 6314, Parent PID: 4336

General

Start time (UTC):	01:41:40
Start date (UTC):	19/04/2025
Path:	/usr/bin/dash
Arguments:	-
File size:	129816 bytes
MD5 hash:	1e6b1c887c59a315edb7eb9a315fc84c

Process Activities

Process Overlayed (Exec)

Chronological Activities

Analysis Process: rm PID: 6314, Parent PID: 4336

General

Start time (UTC):	01:41:40
Start date (UTC):	19/04/2025
Path:	/usr/bin/rm
Arguments:	rm -f /tmp/tmp.OGgumjUYWx /tmp/tmp.4dxlHcGEqS /tmp/tmp.pynADpsMy4
File size:	72056 bytes
MD5 hash:	aa2b5496fdbfd88e38791ab81f90b95b

File Activities

File Opened

File Deleted

File Read

Chronological Activities

Analysis Process: dash PID: 6315, Parent PID: 4336

General

Start time (UTC):	01:41:40
Start date (UTC):	19/04/2025
Path:	/usr/bin/dash
Arguments:	-
File size:	129816 bytes
MD5 hash:	1e6b1c887c59a315edb7eb9a315fc84c

Process Activities

Process Overlayed (Exec)

Chronological Activities

Analysis Process: rm PID: 6315, Parent PID: 4336

General

Start time (UTC):	01:41:40
Start date (UTC):	19/04/2025
Path:	/usr/bin/rm
Arguments:	rm -f /tmp/tmp.OGgumjUYWx /tmp/tmp.4dxlHcGEqS /tmp/tmp.pynADpsMy4
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 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 tftp.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

Network Behavior

Network Port Distribution

TCP Packets

System Behavior

Analysis Process: tftp.elf PID: 6234, Parent PID: 6159

General

File Activities

File Opened

File Read

Process Activities

Thread Sleep

System Activities

Query System Information (uname)

Chronological Activities

Analysis Process: dash PID: 6314, Parent PID: 4336

General

Process Activities

Process Overlayed (Exec)

Chronological Activities

Analysis Process: rm PID: 6314, Parent PID: 4336

General

File Activities

File Opened

File Deleted

File Read

Chronological Activities

Analysis Process: dash PID: 6315, Parent PID: 4336

General

Process Activities

Process Overlayed (Exec)

Chronological Activities

Analysis Process: rm PID: 6315, Parent PID: 4336

General

File Activities

File Opened

Linux Analysis Report
tftp.elf