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Linux Analysis Report
nshkarm.elf

Overview

General Information

Sample name:	nshkarm.elf
Analysis ID:	1581709
MD5:	cafea9b253df5c3895b2f5278d90e387
SHA1:	02f83f0b482ae2806bc9a98f064e8de8e8077ab0
SHA256:	3f8fcccb52fe16c238ab075559457d5cdbd80c4454e8e59bcf203cb198e17bac
Tags:	elfuser-abuse_ch
Infos:

Detection

Score:	48
Range:	0 - 100
Whitelisted:	false

Signatures

Multi AV Scanner detection for submitted file

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:	1581709
Start date and time:	2024-12-28 18:56:14 +01:00
Joe Sandbox product:	CloudBasic
Overall analysis duration:	0h 4m 19s
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:	nshkarm.elf
Detection:	MAL
Classification:	mal48.linELF@0/0@0/0

Runtime Messages

Command:	/tmp/nshkarm.elf
PID:	5432
Exit Code:	1
Exit Code Info:
Killed:	False
Standard Output:
Standard Error:

Process Tree

system is lnxubuntu20

nshkarm.elf (PID: 5432, Parent: 5356, MD5: 5ebfcae4fe2471fcc5695c2394773ff1) Arguments: /tmp/nshkarm.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: nshkarm.elf

ReversingLabs: Detection: 18%

Source: global traffic

TCP traffic: 192.168.2.13:48202 -> 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: unknown

Network traffic detected: HTTP traffic on port 48202 -> 443

Source: ELF static info symbol of initial sample

.symtab present: no

Source: classification engine

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

Source: /tmp/nshkarm.elf (PID: 5432)

Queries kernel information via 'uname':

Jump to behavior

Source: nshkarm.elf, 5432.1.00007ffcb6e97000.00007ffcb6eb8000.rw-.sdmp	Binary or memory string: x86_64/usr/bin/qemu-arm/tmp/nshkarm.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/nshkarm.elf
Source: nshkarm.elf, 5432.1.00005567dcdd5000.00005567dcf03000.rw-.sdmp	Binary or memory string: gU!/etc/qemu-binfmt/arm
Source: nshkarm.elf, 5432.1.00005567dcdd5000.00005567dcf03000.rw-.sdmp	Binary or memory string: /etc/qemu-binfmt/arm
Source: nshkarm.elf, 5432.1.00007ffcb6e97000.00007ffcb6eb8000.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 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
nshkarm.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	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	wrjkngh4.elf	Get hash	malicious	Mirai	Browse
	mips.elf	Get hash	malicious	Gafgyt	Browse
	yakuza.m68k.elf	Get hash	malicious	Mirai	Browse
	mpsl.elf	Get hash	malicious	Gafgyt	Browse
	yakuza.i586.elf	Get hash	malicious	Mirai	Browse
	x86_64.elf	Get hash	malicious	Gafgyt	Browse
	45.200.149.186-boatnet.arc-2024-12-28T01_22_59.elf	Get hash	malicious	Mirai	Browse
	109.176.30.237-boatnet.mpsl-2024-12-27T20_20_43.elf	Get hash	malicious	Mirai	Browse
	drp.x86.elf	Get hash	malicious	Mirai, Okiru	Browse
	ppc.elf	Get hash	malicious	Mirai	Browse

Domains

⊘No context

ASNs

Match	Associated Sample Name / URL	SHA 256	Detection	Threat Name	Link	Context
CANONICAL-ASGB	nshkmips.elf	Get hash	malicious	Unknown	Browse	91.189.91.42
	wrjkngh4.elf	Get hash	malicious	Mirai	Browse	185.125.190.26
	mips.elf	Get hash	malicious	Gafgyt	Browse	91.189.91.42
	wlw68k.elf	Get hash	malicious	Mirai	Browse	91.189.91.42
	woega6.elf	Get hash	malicious	Mirai	Browse	91.189.91.42
	nshkarm5.elf	Get hash	malicious	Unknown	Browse	91.189.91.42
	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

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):	6.09416728880594
TrID:	ELF Executable and Linkable format (generic) (4004/1) 100.00%
File name:	nshkarm.elf
File size:	67'284 bytes
MD5:	cafea9b253df5c3895b2f5278d90e387
SHA1:	02f83f0b482ae2806bc9a98f064e8de8e8077ab0
SHA256:	3f8fcccb52fe16c238ab075559457d5cdbd80c4454e8e59bcf203cb198e17bac
SHA512:	e4c76c0cba1f43bdceaeac65c095b184ecf1be0cb0ec944b405a97c2493c480c5895502ce4a125369455f7840da082eb0d2fc0a884b6b080f5e1e1a3a6562732
SSDEEP:	1536:PtDbGcvHlBf5yJfp522jN4XH3fgHMYTv0s:PtDbGCFBfOfp52uN4nU0s
TLSH:	E6633A81FD815A12C6D1127BFB2E428D771713A8D2EF3203C929AF21378796B0E7B552
File Content Preview:	.ELF...a..........(.........4...D.......4. ...(.....................l...l...............p...p...p........S..........Q.td..................................-...L."....:..........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:	0x202
ELF Header Size:	52
Program Header Offset:	52
Program Header Size:	32
Number of Program Headers:	3
Section Header Offset:	66884
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	0xeb20	0x0	0x6	AX	16
.fini	PROGBITS	0x16bd0	0xebd0	0x14	0x0	0x6	AX	4
.rodata	PROGBITS	0x16be4	0xebe4	0x1588	0x0	0x2	A	4
.ctors	PROGBITS	0x20170	0x10170	0x8	0x0	0x3	WA	4
.dtors	PROGBITS	0x20178	0x10178	0x8	0x0	0x3	WA	4
.data	PROGBITS	0x20184	0x10184	0x380	0x0	0x3	WA	4
.bss	NOBITS	0x20504	0x10504	0x505c	0x0	0x3	WA	4
.shstrtab	STRTAB	0x0	0x10504	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	0x1016c	0x1016c	6.1289	0x5	R E	0x8000	.init .text .fini .rodata
LOAD	0x10170	0x20170	0x20170	0x394	0x53f0	2.8340	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 18:57:04.951937914 CET	48202	443	192.168.2.13	185.125.190.26
Dec 28, 2024 18:57:36.183937073 CET	48202	443	192.168.2.13	185.125.190.26

System Behavior

Analysis Process: nshkarm.elf PID: 5432, Parent PID: 5356

General

Start time (UTC):	17:56:53
Start date (UTC):	28/12/2024
Path:	/tmp/nshkarm.elf
Arguments:	/tmp/nshkarm.elf
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 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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Linux Analysis Report nshkarm.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

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: nshkarm.elf PID: 5432, Parent PID: 5356

General

Chronological Activities

Linux Analysis Report
nshkarm.elf