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Linux Analysis Report
nn.elf

Overview

General Information

Sample name:	nn.elf
Analysis ID:	1538228
MD5:	ed89809e1f1189724567ce62d636f4c1
SHA1:	f1866ab70aba277c2c2f62770f22467f1f18a695
SHA256:	c8631e6bf91d813d691e9bdaeb5a74b28779e2c13fc8e50fe62ab36a52e511a9
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

Tries to connect to HTTP servers, but all servers are down (expired dropper behavior)

Yara signature match

Classification

General Information

Joe Sandbox version:	41.0.0 Charoite
Analysis ID:	1538228
Start date and time:	2024-10-20 20:50:22 +02:00
Joe Sandbox product:	CloudBasic
Overall analysis duration:	0h 5m 4s
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

Runtime Messages

Command:	/tmp/nn.elf
PID:	6289
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: 6262, Parent: 4331)

rm (PID: 6262, Parent: 4331, MD5: aa2b5496fdbfd88e38791ab81f90b95b) Arguments: rm -f /tmp/tmp.pdDljAlyNF /tmp/tmp.RjeH8iViGU /tmp/tmp.g1SjPsgwOG

dash New Fork (PID: 6263, Parent: 4331)

rm (PID: 6263, Parent: 4331, MD5: aa2b5496fdbfd88e38791ab81f90b95b) Arguments: rm -f /tmp/tmp.pdDljAlyNF /tmp/tmp.RjeH8iViGU /tmp/tmp.g1SjPsgwOG

cleanup

Malware Threat Intel

Provided by

Name	Description	Attribution	Blogpost URLs	Link
XMRIG		No Attribution	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: global traffic	TCP traffic: 192.168.2.23:43928 -> 91.189.91.42:443
Source: global traffic	TCP traffic: 192.168.2.23:42516 -> 109.202.202.202:80

Source: unknown	TCP traffic detected without corresponding DNS query: 91.189.91.42
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: 91.189.91.42

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 43928 -> 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: 6262)	Rm executable: /usr/bin/rm -> rm -f /tmp/tmp.pdDljAlyNF /tmp/tmp.RjeH8iViGU /tmp/tmp.g1SjPsgwOG			Jump to behavior
Source: /usr/bin/dash (PID: 6263)	Rm executable: /usr/bin/rm -> rm -f /tmp/tmp.pdDljAlyNF /tmp/tmp.RjeH8iViGU /tmp/tmp.g1SjPsgwOG			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	unknown
https://api.github.com/repos/nanopool/nanominer/releases/latestmalformed	nn.elf	false	unknown
https://gcc.gnu.org/bugs	nn.elf	false	unknown

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
109.202.202.202	unknown	Switzerland		13030	INIT7CH	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
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
91.189.91.42	boatnet.arm7.elf	Get hash	malicious	Mirai	Browse
	boatnet.ppc.elf	Get hash	malicious	Mirai	Browse
	boatnet.mpsl.elf	Get hash	malicious	Mirai	Browse
	bin.x86_64.elf	Get hash	malicious	Gafgyt, Mirai	Browse
	bin.mipsel.elf	Get hash	malicious	Gafgyt, Mirai	Browse
	bin.armv6l.elf	Get hash	malicious	Mirai	Browse
	mips.elf	Get hash	malicious	Gafgyt, Mirai	Browse
	mipsel.elf	Get hash	malicious	Gafgyt, Mirai	Browse
	bin.x86_64.elf	Get hash	malicious	Gafgyt, Mirai	Browse
	bin.armv5l.elf	Get hash	malicious	Gafgyt, Mirai	Browse

Domains

⊘No context

ASNs

Match	Associated Sample Name / URL	SHA 256	Detection	Threat Name	Link	Context
CANONICAL-ASGB	boatnet.arm7.elf	Get hash	malicious	Mirai	Browse	91.189.91.42
	boatnet.ppc.elf	Get hash	malicious	Mirai	Browse	91.189.91.42
	boatnet.mpsl.elf	Get hash	malicious	Mirai	Browse	91.189.91.42
	bin.x86_64.elf	Get hash	malicious	Gafgyt, Mirai	Browse	91.189.91.42
	bin.mipsel.elf	Get hash	malicious	Gafgyt, Mirai	Browse	91.189.91.42
	bin.armv6l.elf	Get hash	malicious	Mirai	Browse	91.189.91.42
	mips.elf	Get hash	malicious	Gafgyt, Mirai	Browse	91.189.91.42
	mipsel.elf	Get hash	malicious	Gafgyt, Mirai	Browse	91.189.91.42
	bin.x86_64.elf	Get hash	malicious	Gafgyt, Mirai	Browse	91.189.91.42
	bin.armv5l.elf	Get hash	malicious	Gafgyt, Mirai	Browse	91.189.91.42
INIT7CH	boatnet.arm7.elf	Get hash	malicious	Mirai	Browse	109.202.202.202
	boatnet.ppc.elf	Get hash	malicious	Mirai	Browse	109.202.202.202
	boatnet.mpsl.elf	Get hash	malicious	Mirai	Browse	109.202.202.202
	bin.x86_64.elf	Get hash	malicious	Gafgyt, Mirai	Browse	109.202.202.202
	bin.mipsel.elf	Get hash	malicious	Gafgyt, Mirai	Browse	109.202.202.202
	bin.armv6l.elf	Get hash	malicious	Mirai	Browse	109.202.202.202
	mips.elf	Get hash	malicious	Gafgyt, Mirai	Browse	109.202.202.202
	mipsel.elf	Get hash	malicious	Gafgyt, Mirai	Browse	109.202.202.202
	bin.x86_64.elf	Get hash	malicious	Gafgyt, Mirai	Browse	109.202.202.202
	bin.armv5l.elf	Get hash	malicious	Gafgyt, 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):	5.08984603975892
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:	33'312'419 bytes
MD5:	ed89809e1f1189724567ce62d636f4c1
SHA1:	f1866ab70aba277c2c2f62770f22467f1f18a695
SHA256:	c8631e6bf91d813d691e9bdaeb5a74b28779e2c13fc8e50fe62ab36a52e511a9
SHA512:	3b6b1298e28ba70033fd27d4b38d0a526a6afa2438712d7d1250f58d5223cd27bdf3a294d17e7219c8196f09bfd92e15762990f994d72194b7558a29a6cc5e8d
SSDEEP:	393216:Se4n2yMyec44bbt3QR68Or5CbB/yBHqjihphKmXMGDiw6lc:LOQbBqBKjihlXMWiwO
TLSH:	B277BF47F59150ECC1AED13486669263BA707CA94B3037EB2B90F7792E32BE05B39354
File Content Preview:	.ELF..............>.......C.....@........A'.........@.8...@.$.#.........@.......@.@.....@.@.....0.......0.......................p.......p.@.....p.@...............................................@.......@.......t.......t....... ...............t............

Timestamp	Source Port	Dest Port	Source IP	Dest IP
Oct 20, 2024 20:51:40.263319969 CEST	43928	443	192.168.2.23	91.189.91.42
Oct 20, 2024 20:51:54.341222048 CEST	42516	80	192.168.2.23	109.202.202.202
Oct 20, 2024 20:52:00.484399080 CEST	43928	443	192.168.2.23	91.189.91.42
Oct 20, 2024 20:52:41.438730001 CEST	43928	443	192.168.2.23	91.189.91.42

System Behavior

Analysis Process: dash PID: 6262, Parent PID: 4331

General

Start time (UTC):	18:51:36
Start date (UTC):	20/10/2024
Path:	/usr/bin/dash
Arguments:	-
File size:	129816 bytes
MD5 hash:	1e6b1c887c59a315edb7eb9a315fc84c

Start time (UTC):	18:51:36
Start date (UTC):	20/10/2024
Path:	/usr/bin/rm
Arguments:	rm -f /tmp/tmp.pdDljAlyNF /tmp/tmp.RjeH8iViGU /tmp/tmp.g1SjPsgwOG
File size:	72056 bytes
MD5 hash:	aa2b5496fdbfd88e38791ab81f90b95b

Start time (UTC):	18:51:36
Start date (UTC):	20/10/2024
Path:	/usr/bin/dash
Arguments:	-
File size:	129816 bytes
MD5 hash:	1e6b1c887c59a315edb7eb9a315fc84c

Start time (UTC):	18:51:36
Start date (UTC):	20/10/2024
Path:	/usr/bin/rm
Arguments:	rm -f /tmp/tmp.pdDljAlyNF /tmp/tmp.RjeH8iViGU /tmp/tmp.g1SjPsgwOG
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: 6262, Parent PID: 4331

General

Chronological Activities

Analysis Process: rm PID: 6262, Parent PID: 4331

General

Chronological Activities

Analysis Process: dash PID: 6263, Parent PID: 4331

General

Chronological Activities

Analysis Process: rm PID: 6263, Parent PID: 4331

General

Chronological Activities

Linux Analysis Report
nn.elf