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Linux Analysis Report
t1.elf

Overview

General Information

Sample name:	t1.elf
Analysis ID:	1589538
MD5:	cc628cf6f08f7fb8c4f248c1eb1d0d65
SHA1:	266912d054878af1866db8962586adc9155b7f9f
SHA256:	ead60a60220a3549a8ddc6264e667f5ac094eb961b7260a9bd10e8dc2cd07cba
Tags:	elfuser-abuse_ch
Infos:

Detection

Score:	48
Range:	0 - 100
Whitelisted:	false

Signatures

Multi AV Scanner detection for submitted file

Enumerates processes within the "proc" file system

Sample has stripped symbol table

Sample tries to kill a process (SIGKILL)

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

Classification

General Information

Joe Sandbox version:	42.0.0 Malachite
Analysis ID:	1589538
Start date and time:	2025-01-12 19:26:12 +01:00
Joe Sandbox product:	CloudBasic
Overall analysis duration:	0h 4m 36s
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:	t1.elf
Detection:	MAL
Classification:	mal48.linELF@0/0@2/0

Runtime Messages

Command:	/tmp/t1.elf
PID:	5520
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

t1.elf (PID: 5520, Parent: 5439, MD5: 0083f1f0e77be34ad27f849842bbb00c) Arguments: /tmp/t1.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: t1.elf	Virustotal: Detection: 17%			Perma Link
Source: t1.elf	ReversingLabs: Detection: 34%

Source: global traffic

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

Source: t1.elf, 5520.1.00007f5e24459000.00007f5e2445e000.rw-.sdmp	String found in binary or memory: http://1/wget.sh
Source: t1.elf, 5520.1.00007f5e24459000.00007f5e2445e000.rw-.sdmp	String found in binary or memory: http://9/curl.sh
Source: t1.elf, 5520.1.00007f5e24459000.00007f5e2445e000.rw-.sdmp	String found in binary or memory: http://schemas.xmlsoap.org/soap/encoding/
Source: t1.elf, 5520.1.00007f5e24459000.00007f5e2445e000.rw-.sdmp	String found in binary or memory: http://schemas.xmlsoap.org/soap/envelope/

Source: ELF static info symbol of initial sample

.symtab present: no

Source: /tmp/t1.elf (PID: 5520)

SIGKILL sent: pid: 888, result: successful

Jump to behavior

Source: classification engine

Classification label: mal48.linELF@0/0@2/0

Source: /tmp/t1.elf (PID: 5520)	File opened: /proc/5520/status	Jump to behavior
Source: /tmp/t1.elf (PID: 5520)	File opened: /proc/490/cmdline	Jump to behavior
Source: /tmp/t1.elf (PID: 5520)	File opened: /proc/490/cmdline	Jump to behavior
Source: /tmp/t1.elf (PID: 5520)	File opened: /proc/780/cmdline	Jump to behavior
Source: /tmp/t1.elf (PID: 5520)	File opened: /proc/780/cmdline	Jump to behavior
Source: /tmp/t1.elf (PID: 5520)	File opened: /proc/791/cmdline	Jump to behavior
Source: /tmp/t1.elf (PID: 5520)	File opened: /proc/791/cmdline	Jump to behavior
Source: /tmp/t1.elf (PID: 5520)	File opened: /proc/1/cmdline	Jump to behavior
Source: /tmp/t1.elf (PID: 5520)	File opened: /proc/1/cmdline	Jump to behavior
Source: /tmp/t1.elf (PID: 5520)	File opened: /proc/661/cmdline	Jump to behavior
Source: /tmp/t1.elf (PID: 5520)	File opened: /proc/661/cmdline	Jump to behavior
Source: /tmp/t1.elf (PID: 5520)	File opened: /proc/782/cmdline	Jump to behavior
Source: /tmp/t1.elf (PID: 5520)	File opened: /proc/782/cmdline	Jump to behavior
Source: /tmp/t1.elf (PID: 5520)	File opened: /proc/794/cmdline	Jump to behavior
Source: /tmp/t1.elf (PID: 5520)	File opened: /proc/794/cmdline	Jump to behavior
Source: /tmp/t1.elf (PID: 5520)	File opened: /proc/795/cmdline	Jump to behavior
Source: /tmp/t1.elf (PID: 5520)	File opened: /proc/795/cmdline	Jump to behavior
Source: /tmp/t1.elf (PID: 5520)	File opened: /proc/785/cmdline	Jump to behavior
Source: /tmp/t1.elf (PID: 5520)	File opened: /proc/785/cmdline	Jump to behavior
Source: /tmp/t1.elf (PID: 5520)	File opened: /proc/797/cmdline	Jump to behavior
Source: /tmp/t1.elf (PID: 5520)	File opened: /proc/797/cmdline	Jump to behavior
Source: /tmp/t1.elf (PID: 5520)	File opened: /proc/853/cmdline	Jump to behavior
Source: /tmp/t1.elf (PID: 5520)	File opened: /proc/853/cmdline	Jump to behavior
Source: /tmp/t1.elf (PID: 5520)	File opened: /proc/767/cmdline	Jump to behavior
Source: /tmp/t1.elf (PID: 5520)	File opened: /proc/767/cmdline	Jump to behavior
Source: /tmp/t1.elf (PID: 5520)	File opened: /proc/800/cmdline	Jump to behavior
Source: /tmp/t1.elf (PID: 5520)	File opened: /proc/800/cmdline	Jump to behavior
Source: /tmp/t1.elf (PID: 5520)	File opened: /proc/888/cmdline	Jump to behavior
Source: /tmp/t1.elf (PID: 5520)	File opened: /proc/888/cmdline	Jump to behavior
Source: /tmp/t1.elf (PID: 5520)	File opened: /proc/801/cmdline	Jump to behavior
Source: /tmp/t1.elf (PID: 5520)	File opened: /proc/801/cmdline	Jump to behavior
Source: /tmp/t1.elf (PID: 5520)	File opened: /proc/725/cmdline	Jump to behavior
Source: /tmp/t1.elf (PID: 5520)	File opened: /proc/725/cmdline	Jump to behavior
Source: /tmp/t1.elf (PID: 5520)	File opened: /proc/769/cmdline	Jump to behavior
Source: /tmp/t1.elf (PID: 5520)	File opened: /proc/769/cmdline	Jump to behavior
Source: /tmp/t1.elf (PID: 5520)	File opened: /proc/726/cmdline	Jump to behavior
Source: /tmp/t1.elf (PID: 5520)	File opened: /proc/726/cmdline	Jump to behavior
Source: /tmp/t1.elf (PID: 5520)	File opened: /proc/803/cmdline	Jump to behavior
Source: /tmp/t1.elf (PID: 5520)	File opened: /proc/803/cmdline	Jump to behavior
Source: /tmp/t1.elf (PID: 5520)	File opened: /proc/806/cmdline	Jump to behavior
Source: /tmp/t1.elf (PID: 5520)	File opened: /proc/806/cmdline	Jump to behavior
Source: /tmp/t1.elf (PID: 5520)	File opened: /proc/807/cmdline	Jump to behavior
Source: /tmp/t1.elf (PID: 5520)	File opened: /proc/807/cmdline	Jump to behavior

Source: /tmp/t1.elf (PID: 5520)

Queries kernel information via 'uname':

Jump to behavior

Source: t1.elf, 5520.1.00007ffce875d000.00007ffce877e000.rw-.sdmp	Binary or memory string: vx86_64/usr/bin/qemu-mips/tmp/t1.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/t1.elf
Source: t1.elf, 5520.1.000055686a5e8000.000055686a690000.rw-.sdmp	Binary or memory string: /etc/qemu-binfmt/mips
Source: t1.elf, 5520.1.00007ffce875d000.00007ffce877e000.rw-.sdmp	Binary or memory string: /usr/bin/qemu-mips
Source: t1.elf, 5520.1.00007ffce875d000.00007ffce877e000.rw-.sdmp	Binary or memory string: qemu: uncaught target signal 11 (Segmentation fault) - core dumped
Source: t1.elf, 5520.1.000055686a5e8000.000055686a690000.rw-.sdmp	Binary or memory string: _jhU!/etc/qemu-binfmt/mips

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	1 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	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
t1.elf	17%	Virustotal		Browse
t1.elf	34%	ReversingLabs	Linux.Trojan.Mirai

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	Reputation
http://1/wget.sh	t1.elf, 5520.1.00007f5e24459000.00007f5e2445e000.rw-.sdmp	false	high
http://schemas.xmlsoap.org/soap/encoding/	t1.elf, 5520.1.00007f5e24459000.00007f5e2445e000.rw-.sdmp	false	high
http://9/curl.sh	t1.elf, 5520.1.00007f5e24459000.00007f5e2445e000.rw-.sdmp	false	high
http://schemas.xmlsoap.org/soap/envelope/	t1.elf, 5520.1.00007f5e24459000.00007f5e2445e000.rw-.sdmp	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	sshd.elf	Get hash	malicious	Unknown	Browse	162.213.35.24
	.i.elf	Get hash	malicious	Unknown	Browse	162.213.35.25
	res.arm7.elf	Get hash	malicious	Unknown	Browse	162.213.35.25
	boatnet.i686.elf	Get hash	malicious	Mirai	Browse	162.213.35.25
	boatnet.m68k.elf	Get hash	malicious	Mirai	Browse	162.213.35.24
	boatnet.sh4.elf	Get hash	malicious	Mirai	Browse	162.213.35.24
	boatnet.arm6.elf	Get hash	malicious	Mirai	Browse	162.213.35.24
	boatnet.spc.elf	Get hash	malicious	Mirai	Browse	162.213.35.24
	boatnet.mpsl.elf	Get hash	malicious	Mirai	Browse	162.213.35.24
	boatnet.x86_64.elf	Get hash	malicious	Mirai	Browse	162.213.35.25

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 MSB executable, MIPS, MIPS-I version 1 (SYSV), statically linked, stripped
Entropy (8bit):	5.544352424323822
TrID:	ELF Executable and Linkable format (generic) (4004/1) 100.00%
File name:	t1.elf
File size:	102'552 bytes
MD5:	cc628cf6f08f7fb8c4f248c1eb1d0d65
SHA1:	266912d054878af1866db8962586adc9155b7f9f
SHA256:	ead60a60220a3549a8ddc6264e667f5ac094eb961b7260a9bd10e8dc2cd07cba
SHA512:	d95973751f058112d858533d08e52f0f87701b23ff9caa730d8aaac0bd7542b1c1df2632f8b11db93d23fef927dd5233f4072bac8bd81d3b4e0f3d320fc80e2a
SSDEEP:	1536:nj2Tro8JtdqzkgV7D3ZrF8zO8BmU6+Di3CxVitmBYj2hwvgD2ZCb40PQ/O5KxqMu:nSTNtdqzkgP58zrNAytMJT4N
TLSH:	25A3C85D6E264FECF3A9873987B38E319254378223A3D580D1ACEA145E6035E780FB75
File Content Preview:	.ELF.....................@.p...4...@.....4. ...(.............@...@...........................E...E.....P..4.........dt.Q............................<...'......!'.......................<...'......!........'9... ......................<...'......!... ....'9e

Static ELF Info

ELF header
Class:	ELF32
Data:	2's complement, big endian
Version:	1 (current)
Machine:	MIPS R3000
Version Number:	0x1
Type:	EXEC (Executable file)
OS/ABI:	UNIX - System V
ABI Version:	0
Entry Point Address:	0x400270
Flags:	0x1007
ELF Header Size:	52
Program Header Offset:	52
Program Header Size:	32
Number of Program Headers:	3
Section Header Offset:	101952
Section Header Size:	40
Number of Section Headers:	15
Header String Table Index:	14

Sections

Name	Type	Address	Offset	Size	EntSize	Flags	Flags Description	Align
	NULL	0x0	0x0	0x0	0x0	0x0		0
.init	PROGBITS	0x400094	0x94	0x8c	0x0	0x6	AX	4
.text	PROGBITS	0x400120	0x120	0x16520	0x0	0x6	AX	16
.fini	PROGBITS	0x416640	0x16640	0x5c	0x0	0x6	AX	4
.rodata	PROGBITS	0x4166a0	0x166a0	0x1ce0	0x0	0x2	A	16
.eh_frame	PROGBITS	0x458380	0x18380	0x4	0x0	0x3	WA	4
.ctors	PROGBITS	0x458384	0x18384	0x8	0x0	0x3	WA	4
.dtors	PROGBITS	0x45838c	0x1838c	0x8	0x0	0x3	WA	4
.data.rel.ro	PROGBITS	0x458398	0x18398	0xc	0x0	0x3	WA	4
.data	PROGBITS	0x4583b0	0x183b0	0x4d8	0x0	0x3	WA	16
.got	PROGBITS	0x458890	0x18890	0x540	0x4	0x10000003	WAp	16
.sbss	NOBITS	0x458dd0	0x18dd0	0x18	0x0	0x10000003	WAp	4
.bss	NOBITS	0x458df0	0x18dd0	0x29a8	0x0	0x3	WA	16
.mdebug.abi32	PROGBITS	0x9c6	0x18dd0	0x0	0x0	0x0		1
.shstrtab	STRTAB	0x0	0x18dd0	0x6e	0x0	0x0		1

Program Segments

Type	Offset	Virtual Address	Physical Address	File Size	Memory Size	Entropy	Flags	Flags Description	Align	Section Mappings
LOAD	0x0	0x400000	0x400000	0x18380	0x18380	5.5316	0x5	R E	0x10000	.init .text .fini .rodata
LOAD	0x18380	0x458380	0x458380	0xa50	0x3418	5.2491	0x6	RW	0x10000	.eh_frame .ctors .dtors .data.rel.ro .data .got .sbss .bss
GNU_STACK	0x0	0x0	0x0	0x0	0x0	0.0000	0x7	RWE	0x4

Network Behavior

Network Port Distribution

UDP Packets

Timestamp	Source Port	Dest Port	Source IP	Dest IP
Jan 12, 2025 19:27:10.359369040 CET	57805	53	192.168.2.14	8.8.8.8
Jan 12, 2025 19:27:10.359428883 CET	53960	53	192.168.2.14	8.8.8.8
Jan 12, 2025 19:27:10.365904093 CET	53	53960	8.8.8.8	192.168.2.14
Jan 12, 2025 19:27:10.366092920 CET	53	57805	8.8.8.8	192.168.2.14

DNS Queries

Timestamp	Source IP	Dest IP	Trans ID	OP Code	Name	Type	Class	DNS over HTTPS
Jan 12, 2025 19:27:10.359369040 CET	192.168.2.14	8.8.8.8	0x6aba	Standard query (0)	daisy.ubuntu.com	A (IP address)	IN (0x0001)	false
Jan 12, 2025 19:27:10.359428883 CET	192.168.2.14	8.8.8.8	0x5461	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
Jan 12, 2025 19:27:10.366092920 CET	8.8.8.8	192.168.2.14	0x6aba	No error (0)	daisy.ubuntu.com		162.213.35.25	A (IP address)	IN (0x0001)	false
Jan 12, 2025 19:27:10.366092920 CET	8.8.8.8	192.168.2.14	0x6aba	No error (0)	daisy.ubuntu.com		162.213.35.24	A (IP address)	IN (0x0001)	false

System Behavior

Analysis Process: t1.elf PID: 5520, Parent PID: 5439

General

Start time (UTC):	18:27:05
Start date (UTC):	12/01/2025
Path:	/tmp/t1.elf
Arguments:	/tmp/t1.elf
File size:	5777432 bytes
MD5 hash:	0083f1f0e77be34ad27f849842bbb00c

Description:	Adversaries may attempt to dump credentials to obtain account login and credential material, normally in the form of a hash or a clear text password, from the operating system and software. Credentials can then be used to perform Lateral Movement and access restricted information.
Tactics:	Credential Access
Data Sources:	Active Directory: Active Directory Object Access, Command: Command Execution, File: File Access, Network Traffic: Network Traffic Content, Network Traffic: Network Traffic Flow, Process: OS API Execution, Process: Process Access, Process: Process Creation, Windows Registry: Windows Registry Key Access
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 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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Warning!

Linux Analysis Report t1.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

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

Sections

Program Segments

Network Behavior

Network Port Distribution

UDP Packets

DNS Queries

DNS Answers

System Behavior

Analysis Process: t1.elf PID: 5520, Parent PID: 5439

General

Chronological Activities

Linux Analysis Report
t1.elf