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Linux Analysis Report
nn.elf

Overview

General Information

Sample name:	nn.elf
Analysis ID:	1579445
MD5:	29c8547d521036f275cbf709ba246e6b
SHA1:	820e1777de519c3db3192a1c802c4f65f919ffd8
SHA256:	cf8766321e15f41953397dcbf7fccad710d949b13bde100af94b1c1889da4b3f
Tags:	elfuser-abuse_ch
Infos:

Detection

Nanominer, Xmrig

Score:	68
Range:	0 - 100
Whitelisted:	false

Signatures

Malicious sample detected (through community Yara rule)

Yara detected Nanominer

Yara detected Xmrig cryptocurrency miner

Found strings related to Crypto-Mining

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

Yara signature match

Classification

General Information

Joe Sandbox version:	41.0.0 Charoite
Analysis ID:	1579445
Start date and time:	2024-12-22 12:06:09 +01:00
Joe Sandbox product:	CloudBasic
Overall analysis duration:	0h 4m 39s
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:	nn.elf
Detection:	MAL
Classification:	mal68.mine.linELF@0/0@0/0

Warnings

VT rate limit hit for: https://api.nanopool.org/v1/invalid

Runtime Messages

Command:	/tmp/nn.elf
PID:	6257
Exit Code:	139
Exit Code Info:	SIGSEGV (11) Segmentation fault invalid memory reference
Killed:	False
Standard Output:
Standard Error:

Process Tree

system is lnxubuntu20

dash New Fork (PID: 6231, Parent: 4332)

rm (PID: 6231, Parent: 4332, MD5: aa2b5496fdbfd88e38791ab81f90b95b) Arguments: rm -f /tmp/tmp.wBlurrknEK /tmp/tmp.tv2Sni4a7k /tmp/tmp.FBowDQxA6f

dash New Fork (PID: 6232, Parent: 4332)

rm (PID: 6232, Parent: 4332, MD5: aa2b5496fdbfd88e38791ab81f90b95b) Arguments: rm -f /tmp/tmp.wBlurrknEK /tmp/tmp.tv2Sni4a7k /tmp/tmp.FBowDQxA6f

cleanup

Malware Threat Intel

Provided by

Name	Description	Attribution	Blogpost URLs	Link
XMRIG		No Attribution	https://www.aquasec.com/blog/container-security-tnt-container-attack/ https://www.aquasec.com/blog/pg_mem-a-malware-hidden-in-the-postgres-processes/	https://malpedia.caad.fkie.fraunhofer.de/details/elf.xmrig

Yara Signatures

Initial Sample

Source	Rule	Description	Author	Strings
nn.elf	JoeSecurity_Xmrig	Yara detected Xmrig cryptocurrency miner	Joe Security
nn.elf	JoeSecurity_Nanominer	Yara detected Nanominer	Joe Security
nn.elf	Linux_Cryptominer_Generic_e0cca9dc	unknown	unknown	0x1dd87e:$a: 54 24 40 48 8D 94 24 C0 00 00 00 F3 41 0F 6F 01 48 89 7C 24 50 48 89 74

Joe Sandbox Signatures

Click to jump to signature section

Show All Signature Results

Bitcoin Miner

Yara detected Nanominer

Source: Yara match

File source: nn.elf, type: SAMPLE

Yara detected Xmrig cryptocurrency miner

Source: Yara match

File source: nn.elf, type: SAMPLE

Found strings related to Crypto-Mining

Source: nn.elf

String found in binary or memory: St22_Weak_result_type_implIM7IClientFvRKSt7variantIJ12EthashResult13StratumResult17CryptonightResult15VerusHashResultEERKS1_IJ10EthashTask12StratumInput16CryptonightInput14VerusHashInputEESt10shared_ptrI6DeviceEEE

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: nn.elf	String found in binary or memory: https://api.github.com/repos/nanopool/nanominer/releases/latestmalformed
Source: nn.elf	String found in binary or memory: https://api.nanopool.org/v1/invalid
Source: nn.elf	String found in binary or memory: https://blockscout.com/etc/mainnet/api?module=block&action=eth_block_numbertls:
Source: nn.elf	String found in binary or memory: https://gcc.gnu.org/bugs

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

System Summary

Malicious sample detected (through community Yara rule)

Source: nn.elf, type: SAMPLE

Matched rule: Linux_Cryptominer_Generic_e0cca9dc Author: unknown

Source: nn.elf, type: SAMPLE

Matched rule: Linux_Cryptominer_Generic_e0cca9dc reference_sample = 59a1d8aa677739f2edbb8bd34f566b31f19d729b0a115fef2eac8ab1d1acc383, os = linux, severity = x86, creation_date = 2022-01-05, scan_context = file, memory, license = Elastic License v2, threat_name = Linux.Cryptominer.Generic, fingerprint = e7bc17ba356774ed10e65c95a8db3b09d3b9be72703e6daa9b601ea820481db7, id = e0cca9dc-0f3e-42d8-bb43-0625f4f9bfe1, last_modified = 2022-01-26

Source: classification engine

Classification label: mal68.mine.linELF@0/0@0/0

Source: /usr/bin/dash (PID: 6231)	Rm executable: /usr/bin/rm -> rm -f /tmp/tmp.wBlurrknEK /tmp/tmp.tv2Sni4a7k /tmp/tmp.FBowDQxA6f			Jump to behavior
Source: /usr/bin/dash (PID: 6232)	Rm executable: /usr/bin/rm -> rm -f /tmp/tmp.wBlurrknEK /tmp/tmp.tv2Sni4a7k /tmp/tmp.FBowDQxA6f			Jump to behavior

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	System Service 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
nn.elf	11%	ReversingLabs	Linux.Coinminer.Generic

Name	Source	Malicious	Reputation
https://api.nanopool.org/v1/invalid	nn.elf	false	unknown
https://blockscout.com/etc/mainnet/api?module=block&action=eth_block_numbertls:	nn.elf	false	high
https://api.github.com/repos/nanopool/nanominer/releases/latestmalformed	nn.elf	false	high
https://gcc.gnu.org/bugs	nn.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	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.nn.elf	Get hash	malicious	Mirai, Okiru	Browse
	dlr.arm6.elf	Get hash	malicious	Unknown	Browse
	arm6.elf	Get hash	malicious	Mirai	Browse
	http://112.31.189.32:40158	Get hash	malicious	Mirai	Browse
	Aqua.mpsl.elf	Get hash	malicious	Mirai	Browse
	bot.arm7.elf	Get hash	malicious	Mirai, Okiru	Browse
	la.bot.arc.elf	Get hash	malicious	Mirai	Browse
	armv6l.elf	Get hash	malicious	Mirai	Browse
	la.bot.powerpc.elf	Get hash	malicious	Mirai	Browse
	la.bot.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	arm6.nn.elf	Get hash	malicious	Mirai, Okiru	Browse
	vlxx.m68k.elf	Get hash	malicious	Mirai, Gafgyt, Okiru	Browse
	vlxx.arm.elf	Get hash	malicious	Mirai, Gafgyt, Okiru	Browse
	la.bot.m68k.elf	Get hash	malicious	Mirai	Browse
	la.bot.arm7.elf	Get hash	malicious	Mirai	Browse
	la.bot.arm5.elf	Get hash	malicious	Mirai	Browse
	la.bot.arm.elf	Get hash	malicious	Mirai	Browse
	la.bot.arm6.elf	Get hash	malicious	Mirai	Browse
	la.bot.sparc.elf	Get hash	malicious	Mirai	Browse
	la.bot.mips.elf	Get hash	malicious	Mirai	Browse
91.189.91.42	arm6.nn.elf	Get hash	malicious	Mirai, Okiru	Browse
	vlxx.m68k.elf	Get hash	malicious	Mirai, Gafgyt, Okiru	Browse
	vlxx.arm5.elf	Get hash	malicious	Mirai, Gafgyt, Okiru	Browse
	vlxx.arm.elf	Get hash	malicious	Mirai, Gafgyt, Okiru	Browse
	la.bot.m68k.elf	Get hash	malicious	Mirai	Browse
	la.bot.arm7.elf	Get hash	malicious	Mirai	Browse
	la.bot.arm5.elf	Get hash	malicious	Mirai	Browse
	la.bot.arm.elf	Get hash	malicious	Mirai	Browse
	la.bot.arm6.elf	Get hash	malicious	Mirai	Browse
	la.bot.sparc.elf	Get hash	malicious	Mirai	Browse

Domains

⊘No context

ASNs

Match	Associated Sample Name / URL	SHA 256	Detection	Threat Name	Link	Context
CANONICAL-ASGB	arm6.nn.elf	Get hash	malicious	Mirai, Okiru	Browse	91.189.91.42
	vlxx.m68k.elf	Get hash	malicious	Mirai, Gafgyt, Okiru	Browse	91.189.91.42
	vlxx.arm5.elf	Get hash	malicious	Mirai, Gafgyt, Okiru	Browse	91.189.91.42
	vlxx.arm.elf	Get hash	malicious	Mirai, Gafgyt, Okiru	Browse	91.189.91.42
	vlxx.mpsl.elf	Get hash	malicious	Mirai, Gafgyt, Okiru	Browse	185.125.190.26
	la.bot.m68k.elf	Get hash	malicious	Mirai	Browse	91.189.91.42
	la.bot.arm7.elf	Get hash	malicious	Mirai	Browse	91.189.91.42
	la.bot.arm5.elf	Get hash	malicious	Mirai	Browse	91.189.91.42
	la.bot.arm.elf	Get hash	malicious	Mirai	Browse	91.189.91.42
	la.bot.arm6.elf	Get hash	malicious	Mirai	Browse	91.189.91.42
CANONICAL-ASGB	arm6.nn.elf	Get hash	malicious	Mirai, Okiru	Browse	91.189.91.42
	vlxx.m68k.elf	Get hash	malicious	Mirai, Gafgyt, Okiru	Browse	91.189.91.42
	vlxx.arm5.elf	Get hash	malicious	Mirai, Gafgyt, Okiru	Browse	91.189.91.42
	vlxx.arm.elf	Get hash	malicious	Mirai, Gafgyt, Okiru	Browse	91.189.91.42
	vlxx.mpsl.elf	Get hash	malicious	Mirai, Gafgyt, Okiru	Browse	185.125.190.26
	la.bot.m68k.elf	Get hash	malicious	Mirai	Browse	91.189.91.42
	la.bot.arm7.elf	Get hash	malicious	Mirai	Browse	91.189.91.42
	la.bot.arm5.elf	Get hash	malicious	Mirai	Browse	91.189.91.42
	la.bot.arm.elf	Get hash	malicious	Mirai	Browse	91.189.91.42
	la.bot.arm6.elf	Get hash	malicious	Mirai	Browse	91.189.91.42
AMAZON-02US	arm.nn.elf	Get hash	malicious	Mirai, Okiru	Browse	34.252.132.197
	arm6.nn.elf	Get hash	malicious	Mirai, Okiru	Browse	54.171.230.55
	arm5.nn.elf	Get hash	malicious	Mirai, Okiru	Browse	13.236.254.247
	powerpc.nn.elf	Get hash	malicious	Mirai, Okiru	Browse	54.154.131.169
	sparc.nn.elf	Get hash	malicious	Mirai, Okiru	Browse	108.154.170.136
	3.elf	Get hash	malicious	Unknown	Browse	54.97.133.72
	mips.nn.elf	Get hash	malicious	Mirai, Okiru	Browse	18.159.41.41
	x86_32.nn.elf	Get hash	malicious	Mirai, Okiru	Browse	3.35.124.145
	mipsel.nn.elf	Get hash	malicious	Mirai, Okiru	Browse	18.254.104.182
	nshkppc.elf	Get hash	malicious	Mirai	Browse	3.193.46.42
INIT7CH	arm6.nn.elf	Get hash	malicious	Mirai, Okiru	Browse	109.202.202.202
	vlxx.m68k.elf	Get hash	malicious	Mirai, Gafgyt, Okiru	Browse	109.202.202.202
	vlxx.arm5.elf	Get hash	malicious	Mirai, Gafgyt, Okiru	Browse	109.202.202.202
	vlxx.arm.elf	Get hash	malicious	Mirai, Gafgyt, Okiru	Browse	109.202.202.202
	la.bot.m68k.elf	Get hash	malicious	Mirai	Browse	109.202.202.202
	la.bot.arm7.elf	Get hash	malicious	Mirai	Browse	109.202.202.202
	la.bot.arm5.elf	Get hash	malicious	Mirai	Browse	109.202.202.202
	la.bot.arm.elf	Get hash	malicious	Mirai	Browse	109.202.202.202
	la.bot.arm6.elf	Get hash	malicious	Mirai	Browse	109.202.202.202
	la.bot.sparc.elf	Get hash	malicious	Mirai	Browse	109.202.202.202

File type:	ELF 64-bit LSB executable, x86-64, version 1 (GNU/Linux), dynamically linked, interpreter /lib64/ld-linux-x86-64.so.2, missing section headers at 52906664
Entropy (8bit):	5.3938945379024075
TrID:	ELF Executable and Linkable format (Linux) (4029/14) 50.16% ELF Executable and Linkable format (generic) (4004/1) 49.84%
File name:	nn.elf
File size:	28'785'635 bytes
MD5:	29c8547d521036f275cbf709ba246e6b
SHA1:	820e1777de519c3db3192a1c802c4f65f919ffd8
SHA256:	cf8766321e15f41953397dcbf7fccad710d949b13bde100af94b1c1889da4b3f
SHA512:	0f03bd570fd6c8bedcfadb1bebd73af95c8214b8979b5409684b4811d2dfcaa6c06df28f253072f735428eb73a5c085ea5fe3ae6924bfaed4c565cc9ef7021c3
SSDEEP:	393216:Se4n2yMyec44bbt3QR68Or5CbB/yBHqjihphKmXMGDiw6l:LOQbBqBKjihlXMWiwO
TLSH:	5857BE47F59150ECC1AED13486669263BA707CA94B3037EB2B90F7792E32BE05B39354
File Content Preview:	.ELF..............>.......C.....@........A'.........@.8...@.$.#.........@.......@.@.....@.@.....0.......0.......................p.......p.@.....p.@...............................................@.......@.......t.......t....... ...............t............

Timestamp	Source Port	Dest Port	Source IP	Dest IP
Dec 22, 2024 12:06:53.813630104 CET	443	33606	54.171.230.55	192.168.2.23
Dec 22, 2024 12:06:53.813792944 CET	33606	443	192.168.2.23	54.171.230.55
Dec 22, 2024 12:06:53.933490992 CET	443	33606	54.171.230.55	192.168.2.23
Dec 22, 2024 12:06:55.594907999 CET	43928	443	192.168.2.23	91.189.91.42
Dec 22, 2024 12:07:01.226272106 CET	42836	443	192.168.2.23	91.189.91.43
Dec 22, 2024 12:07:02.250005007 CET	42516	80	192.168.2.23	109.202.202.202
Dec 22, 2024 12:07:17.351969004 CET	43928	443	192.168.2.23	91.189.91.42
Dec 22, 2024 12:07:27.590528965 CET	42836	443	192.168.2.23	91.189.91.43
Dec 22, 2024 12:07:31.685985088 CET	42516	80	192.168.2.23	109.202.202.202
Dec 22, 2024 12:07:58.306440115 CET	43928	443	192.168.2.23	91.189.91.42

System Behavior

Analysis Process: dash PID: 6231, Parent PID: 4332

General

Start time (UTC):	11:06:53
Start date (UTC):	22/12/2024
Path:	/usr/bin/dash
Arguments:	-
File size:	129816 bytes
MD5 hash:	1e6b1c887c59a315edb7eb9a315fc84c

Start time (UTC):	11:06:53
Start date (UTC):	22/12/2024
Path:	/usr/bin/rm
Arguments:	rm -f /tmp/tmp.wBlurrknEK /tmp/tmp.tv2Sni4a7k /tmp/tmp.FBowDQxA6f
File size:	72056 bytes
MD5 hash:	aa2b5496fdbfd88e38791ab81f90b95b

Start time (UTC):	11:06:53
Start date (UTC):	22/12/2024
Path:	/usr/bin/dash
Arguments:	-
File size:	129816 bytes
MD5 hash:	1e6b1c887c59a315edb7eb9a315fc84c

Start time (UTC):	11:06:53
Start date (UTC):	22/12/2024
Path:	/usr/bin/rm
Arguments:	rm -f /tmp/tmp.wBlurrknEK /tmp/tmp.tv2Sni4a7k /tmp/tmp.FBowDQxA6f
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 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 nn.elf

Overview

General Information

Detection

Signatures

Classification

General Information

Warnings

Runtime Messages

Process Tree

Malware Threat Intel

Yara Signatures

Initial Sample

Suricata Signatures

Joe Sandbox Signatures

Bitcoin Miner

Networking

System Summary

Persistence and Installation Behavior

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

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: dash PID: 6231, Parent PID: 4332

General

Chronological Activities

Analysis Process: rm PID: 6231, Parent PID: 4332

General

Chronological Activities

Analysis Process: dash PID: 6232, Parent PID: 4332

General

Chronological Activities

Analysis Process: rm PID: 6232, Parent PID: 4332

General

Chronological Activities

Linux Analysis Report
nn.elf