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Linux Analysis Report
nshkarm5.elf

Overview

General Information

Sample name:	nshkarm5.elf
Analysis ID:	1581695
MD5:	4d7daf54483d7f1836d58dc0b45b837e
SHA1:	a334911738878eba97d0938c83d513db004201af
SHA256:	5400397ff28501b018dedc385e1fd0a6f47d1dc5e58f8bb718a44017e65b2d07
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

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

Classification

General Information

Joe Sandbox version:	41.0.0 Charoite
Analysis ID:	1581695
Start date and time:	2024-12-28 17:41:03 +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:	nshkarm5.elf
Detection:	MAL
Classification:	mal48.linELF@0/0@0/0

Runtime Messages

Command:	/tmp/nshkarm5.elf
PID:	6232
Exit Code:	1
Exit Code Info:
Killed:	False
Standard Output:
Standard Error:

Process Tree

system is lnxubuntu20

dash New Fork (PID: 6230, Parent: 4331)

rm (PID: 6230, Parent: 4331, MD5: aa2b5496fdbfd88e38791ab81f90b95b) Arguments: rm -f /tmp/tmp.gu1y5KRUYe /tmp/tmp.kTPLizc5fD /tmp/tmp.fn7UnvgK2Z

dash New Fork (PID: 6231, Parent: 4331)

rm (PID: 6231, Parent: 4331, MD5: aa2b5496fdbfd88e38791ab81f90b95b) Arguments: rm -f /tmp/tmp.gu1y5KRUYe /tmp/tmp.kTPLizc5fD /tmp/tmp.fn7UnvgK2Z

nshkarm5.elf (PID: 6232, Parent: 6154, MD5: 5ebfcae4fe2471fcc5695c2394773ff1) Arguments: /tmp/nshkarm5.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: nshkarm5.elf

ReversingLabs: Detection: 18%

Source: unknown	TCP traffic detected without corresponding DNS query: 54.171.230.55
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: 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	Network traffic detected: HTTP traffic on port 443 -> 33606
Source: unknown	Network traffic detected: HTTP traffic on port 33606 -> 443
Source: unknown	Network traffic detected: HTTP traffic on port 43928 -> 443
Source: unknown	Network traffic detected: HTTP traffic on port 42836 -> 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: 6230)	Rm executable: /usr/bin/rm -> rm -f /tmp/tmp.gu1y5KRUYe /tmp/tmp.kTPLizc5fD /tmp/tmp.fn7UnvgK2Z			Jump to behavior
Source: /usr/bin/dash (PID: 6231)	Rm executable: /usr/bin/rm -> rm -f /tmp/tmp.gu1y5KRUYe /tmp/tmp.kTPLizc5fD /tmp/tmp.fn7UnvgK2Z			Jump to behavior

Source: /tmp/nshkarm5.elf (PID: 6232)

Queries kernel information via 'uname':

Jump to behavior

Source: nshkarm5.elf, 6232.1.000055cffd4ed000.000055cffd61b000.rw-.sdmp	Binary or memory string: U!/etc/qemu-binfmt/arm
Source: nshkarm5.elf, 6232.1.00007fff8e5da000.00007fff8e5fb000.rw-.sdmp	Binary or memory string: x86_64/usr/bin/qemu-arm/tmp/nshkarm5.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/nshkarm5.elf
Source: nshkarm5.elf, 6232.1.000055cffd4ed000.000055cffd61b000.rw-.sdmp	Binary or memory string: /etc/qemu-binfmt/arm
Source: nshkarm5.elf, 6232.1.00007fff8e5da000.00007fff8e5fb000.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	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
nshkarm5.elf	18%	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	ASN	ASN Name	Malicious
54.171.230.55	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
54.171.230.55	arm6.elf	Get hash	malicious	Gafgyt	Browse
	yakuza.arm4.elf	Get hash	malicious	Mirai	Browse
	45.200.149.186-boatnet.arm6-2024-12-28T01_23_00.elf	Get hash	malicious	Mirai	Browse
	mips.elf	Get hash	malicious	Unknown	Browse
	byte.ppc.elf	Get hash	malicious	Mirai, Okiru	Browse
	.i.elf	Get hash	malicious	Unknown	Browse
	sh4.nn.elf	Get hash	malicious	Okiru	Browse
	mipsel.nn.elf	Get hash	malicious	Okiru	Browse
	feiwbps.elf	Get hash	malicious	Mirai	Browse
	most-mips.elf	Get hash	malicious	Unknown	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	mpsl.elf	Get hash	malicious	Gafgyt	Browse
	arm6.elf	Get hash	malicious	Gafgyt	Browse
	arm7.elf	Get hash	malicious	Unknown	Browse
	yakuza.mips.elf	Get hash	malicious	Mirai	Browse
	yakuza.arm5.elf	Get hash	malicious	Mirai	Browse
	x86_64.elf	Get hash	malicious	Gafgyt	Browse
	arm5.elf	Get hash	malicious	Gafgyt	Browse
	arm6.elf	Get hash	malicious	Gafgyt	Browse
	arm4.elf	Get hash	malicious	Gafgyt	Browse
	yakuza.sh.elf	Get hash	malicious	Mirai	Browse

Domains

⊘No context

ASNs

Match	Associated Sample Name / URL	SHA 256	Detection	Threat Name	Link	Context
CANONICAL-ASGB	mpsl.elf	Get hash	malicious	Gafgyt	Browse	91.189.91.42
	arm6.elf	Get hash	malicious	Gafgyt	Browse	91.189.91.42
	arm7.elf	Get hash	malicious	Unknown	Browse	91.189.91.42
	yakuza.mips.elf	Get hash	malicious	Mirai	Browse	91.189.91.42
	mips.elf	Get hash	malicious	Gafgyt	Browse	185.125.190.26
	yakuza.arm5.elf	Get hash	malicious	Mirai	Browse	91.189.91.42
	x86_64.elf	Get hash	malicious	Gafgyt	Browse	91.189.91.42
	arm5.elf	Get hash	malicious	Gafgyt	Browse	91.189.91.42
	yakuza.m68k.elf	Get hash	malicious	Mirai	Browse	185.125.190.26
	mpsl.elf	Get hash	malicious	Gafgyt	Browse	185.125.190.26
CANONICAL-ASGB	mpsl.elf	Get hash	malicious	Gafgyt	Browse	91.189.91.42
	arm6.elf	Get hash	malicious	Gafgyt	Browse	91.189.91.42
	arm7.elf	Get hash	malicious	Unknown	Browse	91.189.91.42
	yakuza.mips.elf	Get hash	malicious	Mirai	Browse	91.189.91.42
	mips.elf	Get hash	malicious	Gafgyt	Browse	185.125.190.26
	yakuza.arm5.elf	Get hash	malicious	Mirai	Browse	91.189.91.42
	x86_64.elf	Get hash	malicious	Gafgyt	Browse	91.189.91.42
	arm5.elf	Get hash	malicious	Gafgyt	Browse	91.189.91.42
	yakuza.m68k.elf	Get hash	malicious	Mirai	Browse	185.125.190.26
	mpsl.elf	Get hash	malicious	Gafgyt	Browse	185.125.190.26
AMAZON-02US	https://app.slintel-privacy.com/links/J95tSop4o/SS6JytVVw/qm84IUL58/GFC-9kqk1-	Get hash	malicious	Unknown	Browse	3.109.113.207
	http://prowebideas.com/dsfdgfhgdfsdfdgfhgdrwet/gdfsdfdgfhgfgdfsdfdgfh/gfsdfdgfhgfgdfsdfdgfhgdfsdfdgfh	Get hash	malicious	Unknown	Browse	44.237.4.100
	arm6.elf	Get hash	malicious	Gafgyt	Browse	54.171.230.55
	yakuza.arm4.elf	Get hash	malicious	Mirai	Browse	54.171.230.55
	45.200.149.186-boatnet.arm6-2024-12-28T01_23_00.elf	Get hash	malicious	Mirai	Browse	54.171.230.55
	https://haleborealis.com	Get hash	malicious	Unknown	Browse	108.158.75.126
	https://www.dropbox.com/scl/fi/lncgsm76k7l5ix7fuu5t6/2024-OK-House-Outreach.pdf?rlkey=o4qr50zpdw1z14o6ikdg6zjt8&st=lrloyzlo&dl=0	Get hash	malicious	Unknown	Browse	34.249.87.52
	https://fin.hiringplatform.ca/processes/197662-tax-legislation-officer-ec-06-ec-07?locale=en	Get hash	malicious	Unknown	Browse	52.222.144.19
	http://resources.onestart.ai/onestart_installer_130.0.6723.134.exe	Get hash	malicious	Unknown	Browse	3.160.196.100
	http://resources.onestart.ai/onestart_installer_130.0.6723.134.exe	Get hash	malicious	Unknown	Browse	3.160.196.100
INIT7CH	mpsl.elf	Get hash	malicious	Gafgyt	Browse	109.202.202.202
	arm6.elf	Get hash	malicious	Gafgyt	Browse	109.202.202.202
	arm7.elf	Get hash	malicious	Unknown	Browse	109.202.202.202
	yakuza.mips.elf	Get hash	malicious	Mirai	Browse	109.202.202.202
	yakuza.arm5.elf	Get hash	malicious	Mirai	Browse	109.202.202.202
	x86_64.elf	Get hash	malicious	Gafgyt	Browse	109.202.202.202
	arm5.elf	Get hash	malicious	Gafgyt	Browse	109.202.202.202
	arm6.elf	Get hash	malicious	Gafgyt	Browse	109.202.202.202
	arm4.elf	Get hash	malicious	Gafgyt	Browse	109.202.202.202
	yakuza.sh.elf	Get hash	malicious	Mirai	Browse	109.202.202.202

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, version 1 (ARM), statically linked, stripped
Entropy (8bit):	6.097002869413988
TrID:	ELF Executable and Linkable format (generic) (4004/1) 100.00%
File name:	nshkarm5.elf
File size:	63'772 bytes
MD5:	4d7daf54483d7f1836d58dc0b45b837e
SHA1:	a334911738878eba97d0938c83d513db004201af
SHA256:	5400397ff28501b018dedc385e1fd0a6f47d1dc5e58f8bb718a44017e65b2d07
SHA512:	a74f109b93e7660efac08699dac2b806b860edbe042d8b799fd646594f1bc3b98a8cf702f2681205572709c0c307385f507d16ffc280d04bc264bc775976e5ed
SSDEEP:	768:UTI6nmH0m1kc/L5p8wmCmefHCyDJu/N8Rb8ic6fMPzukvHSgyP164VAPEZXDdI:Uc2IzX/4CfTJuwbNuPzXSfPUE9x
TLSH:	3B533995FD81AB12C6D0217BFB1E428D77275368D2FF32039925AF21778782B0E6B641
File Content Preview:	.ELF...a..........(.........4...........4. ...(..........................................................S..........Q.td..................................-...L."...L7..........0@-.\P...0....S.0...P@...0... ....R......0...0...........0... ....R..... 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:	ARM - ABI
ABI Version:	0
Entry Point Address:	0x8190
Flags:	0x2
ELF Header Size:	52
Program Header Offset:	52
Program Header Size:	32
Number of Program Headers:	3
Section Header Offset:	63372
Section Header Size:	40
Number of Section Headers:	10
Header String Table Index:	9

Sections

Name	Type	Address	Offset	Size	EntSize	Flags	Flags Description	Align
	NULL	0x0	0x0	0x0	0x0	0x0		0
.init	PROGBITS	0x8094	0x94	0x18	0x0	0x6	AX	4
.text	PROGBITS	0x80b0	0xb0	0xdd68	0x0	0x6	AX	16
.fini	PROGBITS	0x15e18	0xde18	0x14	0x0	0x6	AX	4
.rodata	PROGBITS	0x15e2c	0xde2c	0x1588	0x0	0x2	A	4
.ctors	PROGBITS	0x1f3b8	0xf3b8	0x8	0x0	0x3	WA	4
.dtors	PROGBITS	0x1f3c0	0xf3c0	0x8	0x0	0x3	WA	4
.data	PROGBITS	0x1f3cc	0xf3cc	0x380	0x0	0x3	WA	4
.bss	NOBITS	0x1f74c	0xf74c	0x505c	0x0	0x3	WA	4
.shstrtab	STRTAB	0x0	0xf74c	0x3e	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	0xf3b4	0xf3b4	6.1323	0x5	R E	0x8000	.init .text .fini .rodata
LOAD	0xf3b8	0x1f3b8	0x1f3b8	0x394	0x53f0	2.8794	0x6	RW	0x8000	.ctors .dtors .data .bss
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
Dec 28, 2024 17:41:47.783946991 CET	443	33606	54.171.230.55	192.168.2.23
Dec 28, 2024 17:41:47.784064054 CET	33606	443	192.168.2.23	54.171.230.55
Dec 28, 2024 17:41:47.903631926 CET	443	33606	54.171.230.55	192.168.2.23
Dec 28, 2024 17:41:48.946903944 CET	43928	443	192.168.2.23	91.189.91.42
Dec 28, 2024 17:41:54.578175068 CET	42836	443	192.168.2.23	91.189.91.43
Dec 28, 2024 17:41:56.113918066 CET	42516	80	192.168.2.23	109.202.202.202
Dec 28, 2024 17:42:09.168190002 CET	43928	443	192.168.2.23	91.189.91.42
Dec 28, 2024 17:42:21.454334021 CET	42836	443	192.168.2.23	91.189.91.43
Dec 28, 2024 17:42:25.549750090 CET	42516	80	192.168.2.23	109.202.202.202
Dec 28, 2024 17:42:50.122813940 CET	43928	443	192.168.2.23	91.189.91.42

System Behavior

Analysis Process: dash PID: 6230, Parent PID: 4331

General

Start time (UTC):	16:41:46
Start date (UTC):	28/12/2024
Path:	/usr/bin/dash
Arguments:	-
File size:	129816 bytes
MD5 hash:	1e6b1c887c59a315edb7eb9a315fc84c

Chronological Activities

Analysis Process: rm PID: 6230, Parent PID: 4331

General

Start time (UTC):	16:41:46
Start date (UTC):	28/12/2024
Path:	/usr/bin/rm
Arguments:	rm -f /tmp/tmp.gu1y5KRUYe /tmp/tmp.kTPLizc5fD /tmp/tmp.fn7UnvgK2Z
File size:	72056 bytes
MD5 hash:	aa2b5496fdbfd88e38791ab81f90b95b

Chronological Activities

Analysis Process: dash PID: 6231, Parent PID: 4331

General

Start time (UTC):	16:41:46
Start date (UTC):	28/12/2024
Path:	/usr/bin/dash
Arguments:	-
File size:	129816 bytes
MD5 hash:	1e6b1c887c59a315edb7eb9a315fc84c

Chronological Activities

Analysis Process: rm PID: 6231, Parent PID: 4331

General

Start time (UTC):	16:41:46
Start date (UTC):	28/12/2024
Path:	/usr/bin/rm
Arguments:	rm -f /tmp/tmp.gu1y5KRUYe /tmp/tmp.kTPLizc5fD /tmp/tmp.fn7UnvgK2Z
File size:	72056 bytes
MD5 hash:	aa2b5496fdbfd88e38791ab81f90b95b

Chronological Activities

Analysis Process: nshkarm5.elf PID: 6232, Parent PID: 6154

General

Start time (UTC):	16:41:46
Start date (UTC):	28/12/2024
Path:	/tmp/nshkarm5.elf
Arguments:	/tmp/nshkarm5.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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Warning!

Linux Analysis Report nshkarm5.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: 6230, Parent PID: 4331

General

Chronological Activities

Analysis Process: rm PID: 6230, Parent PID: 4331

General

Chronological Activities

Analysis Process: dash PID: 6231, Parent PID: 4331

General

Chronological Activities

Analysis Process: rm PID: 6231, Parent PID: 4331

General

Chronological Activities

Analysis Process: nshkarm5.elf PID: 6232, Parent PID: 6154

General

Chronological Activities

Linux Analysis Report
nshkarm5.elf