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Linux Analysis Report
libc++_shared.so

Overview

General Information

Sample name:	libc++_shared.so
Analysis ID:	1673372
MD5:	0f192b1a8e6c7677916318a4414a1301
SHA1:	1ee477299947129157dc5f5d478851ee9e8235ed
SHA256:	dfdbbc6d633d7d7734271ee3b7a288976393ec0ec38f1fedc99360f266ad5279
Infos:

Detection

Score:	0
Range:	0 - 100

Signatures

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

Classification

General Information

Joe Sandbox version:	42.0.0 Malachite
Analysis ID:	1673372
Start date and time:	2025-04-24 19:15:37 +02:00
Joe Sandbox product:	CloudBasic
Overall analysis duration:	0h 10m 14s
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:	libc++_shared.so
Detection:	CLEAN
Classification:	clean0.linSO@0/0@2/0
Cookbook Comments:	Analysis time extended to 480s due to sleep detection in submitted sample

Runtime Messages

Command:	/tmp/libc++_shared.so
PID:	5432
Exit Code:	132
Exit Code Info:	SIGILL (4) Illegal Instruction
Killed:	False
Standard Output:
Standard Error:	qemu: uncaught target signal 4 (Illegal instruction) - core dumped

Process Tree

system is lnxubuntu20

libc++_shared.so (PID: 5432, Parent: 5355, MD5: 02e8e39e1b46472a60d128a6da84a2b8) Arguments: /tmp/libc++_shared.so

cleanup

Yara Signatures

⊘No yara matches

Suricata Signatures

⊘No Suricata rule has matched

Joe Sandbox Signatures

• Networking
• System Summary
• Malware Analysis System Evasion

Click to jump to signature section

Show All Signature Results

There are no malicious signatures, click here to show all signatures.

Source: unknown	UDP traffic detected without corresponding DNS query: 1.1.1.1
Source: unknown	UDP traffic detected without corresponding DNS query: 1.1.1.1

Source: global traffic

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

Source: libc++_shared.so

String found in binary or memory: https://android.googlesource.com/toolchain/llvm-project

Source: classification engine

Classification label: clean0.linSO@0/0@2/0

Source: /tmp/libc++_shared.so (PID: 5432)

Queries kernel information via 'uname':

Jump to behavior

Source: libc++_shared.so, 5432.1.0000563623bd8000.0000563623c9d000.rw-.sdmp	Binary or memory string: /etc/qemu-binfmt/aarch64
Source: libc++_shared.so, 5432.1.0000563623bd8000.0000563623c9d000.rw-.sdmp	Binary or memory string: #6V1/etc/qemu-binfmt/aarch64O
Source: libc++_shared.so, 5432.1.00007ffced41c000.00007ffced43d000.rw-.sdmp	Binary or memory string: x86_64/usr/bin/qemu-aarch64/tmp/libc++_shared.soSUDO_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/libc++_shared.so
Source: libc++_shared.so, 5432.1.00007ffced41c000.00007ffced43d000.rw-.sdmp	Binary or memory string: qemu: uncaught target signal 4 (Illegal instruction) - core dumped
Source: libc++_shared.so, 5432.1.00007ffced41c000.00007ffced43d000.rw-.sdmp	Binary or memory string: /usr/bin/qemu-aarch64

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 Non-Application Layer Protocol	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
libc++_shared.so	0%	Virustotal		Browse
libc++_shared.so	0%	ReversingLabs

Dropped Files

⊘No Antivirus matches

Domains

⊘No Antivirus matches

URLs

⊘No Antivirus matches

Domains and IPs

Download Network PCAP: filtered – full

Contacted Domains

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
https://android.googlesource.com/toolchain/llvm-project	libc++_shared.so	false		high

World Map of Contacted IPs

⊘No contacted IP infos

Joe Sandbox View / Context

IPs

⊘No context

Domains

Match	Associated Sample Name / URL	SHA 256	Detection	Threat Name	Link	Context
daisy.ubuntu.com	python.elf	Get hash	malicious	Xmrig	Browse	162.213.35.25
	python3.6.3.elf	Get hash	malicious	Xmrig	Browse	162.213.35.25
	hanoi.x86_64.elf	Get hash	malicious	Mirai	Browse	162.213.35.25
	S95baby.sh.elf	Get hash	malicious	Unknown	Browse	162.213.35.25
	ceph-mgr-dashboard-15.2.17-0.el7.noarch.rpm	Get hash	malicious	Unknown	Browse	162.213.35.25
	bin.sh.elf	Get hash	malicious	Mirai	Browse	162.213.35.25
	tftp.elf	Get hash	malicious	Unknown	Browse	162.213.35.24
	hanoi.x86_64.elf	Get hash	malicious	Unknown	Browse	162.213.35.24
	arm5.elf	Get hash	malicious	Unknown	Browse	162.213.35.24
	arm6.elf	Get hash	malicious	Gafgyt	Browse	162.213.35.24

ASNs

⊘No context

JA3 Fingerprints

⊘No context

Dropped Files

⊘No context

Created / dropped Files

⊘No created / dropped files found

Static File Info

General

File type:	ELF 64-bit LSB shared object, ARM aarch64, version 1 (SYSV), dynamically linked, BuildID[sha1]=a59088f9640cd272bc9542d94dc84a0c88afd558, stripped
Entropy (8bit):	6.0729140422067704
TrID:	ELF Executable and Linkable format (Linux) (4029/14) 49.77% ELF Executable and Linkable format (generic) (4004/1) 49.46% Lumena CEL bitmap (63/63) 0.78%
File name:	libc++_shared.so
File size:	1'026'616 bytes
MD5:	0f192b1a8e6c7677916318a4414a1301
SHA1:	1ee477299947129157dc5f5d478851ee9e8235ed
SHA256:	dfdbbc6d633d7d7734271ee3b7a288976393ec0ec38f1fedc99360f266ad5279
SHA512:	36e2a224238dd8db7edbcacb5579fe55b2749bf7c4e51800e8096a36aa4d1ba20f166e7d6d98b895ab3806b5ebbc43bbc535c9cdbd18a46a95f38341a5569712
SSDEEP:	12288:I/MdZJ+CoZS2zFryUt+sLmADXeW4u73dlTm4Autap74FRg:ldZJ+CoZS2zFOaiW4uXu4FRg
TLSH:	1D256E01EF0E5D26CBC5B9BD868313E1A1127CAC2624C9DF2913C11DFE97AD59E227D2
File Content Preview:	.ELF............................@.......8...........@.8...@.............@.......@.......@.......h.......h........................................................................................(.......(......x.......x.......................H.......H......

Network Behavior

Download Network PCAP: filtered – full

UDP Packets

Timestamp	Source Port	Dest Port	Source IP	Dest IP
Apr 24, 2025 19:16:16.317492008 CEST	47266	53	192.168.2.13	1.1.1.1
Apr 24, 2025 19:16:16.317492008 CEST	50611	53	192.168.2.13	1.1.1.1
Apr 24, 2025 19:16:16.458663940 CEST	53	47266	1.1.1.1	192.168.2.13
Apr 24, 2025 19:16:16.491163969 CEST	53	50611	1.1.1.1	192.168.2.13

DNS Queries

Timestamp	Source IP	Dest IP	Trans ID	OP Code	Name	Type	Class	DNS over HTTPS
Apr 24, 2025 19:16:16.317492008 CEST	192.168.2.13	1.1.1.1	0xfd48	Standard query (0)	daisy.ubuntu.com	A (IP address)	IN (0x0001)	false
Apr 24, 2025 19:16:16.317492008 CEST	192.168.2.13	1.1.1.1	0xff2c	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
Apr 24, 2025 19:16:16.458663940 CEST	1.1.1.1	192.168.2.13	0xfd48	No error (0)	daisy.ubuntu.com		162.213.35.25	A (IP address)	IN (0x0001)	false
Apr 24, 2025 19:16:16.458663940 CEST	1.1.1.1	192.168.2.13	0xfd48	No error (0)	daisy.ubuntu.com		162.213.35.24	A (IP address)	IN (0x0001)	false

System Behavior

Analysis Process: libc++_shared.so PID: 5432, Parent PID: 5355

General

Start time (UTC):	17:16:14
Start date (UTC):	24/04/2025
Path:	/tmp/libc++_shared.so
Arguments:	/tmp/libc++_shared.so
File size:	5706200 bytes
MD5 hash:	02e8e39e1b46472a60d128a6da84a2b8

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 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 libc++_shared.so

Overview

General Information

Detection

Signatures

Classification

General Information

Runtime Messages

Process Tree

Yara Signatures

Suricata Signatures

Joe Sandbox Signatures

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

URLs from Memory and Binaries

World Map of Contacted IPs

Joe Sandbox View / Context

IPs

Domains

ASNs

JA3 Fingerprints

Dropped Files

Created / dropped Files

Static File Info

General

Network Behavior

UDP Packets

DNS Queries

DNS Answers

System Behavior

Analysis Process: libc++_shared.so PID: 5432, Parent PID: 5355

General

File Activities

File Opened

File Read

Process Activities

Signal Sent

Thread Sleep

System Activities

Query System Information (uname)

Chronological Activities

Linux Analysis Report
libc++_shared.so