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Linux Analysis Report
x864433.elf

Overview

General Information

Sample name:	x864433.elf
Analysis ID:	1586621
MD5:	1910f33ae648a237376a60c76f2bd61a
SHA1:	8646c9862404a1d6090e9e883b9f6f2c53674d22
SHA256:	198a0922f19f098abb5800a89f581aab8021e74d7b824156a3027b7f3c0e7048
Tags:	BackdoorelfGetshellmalwaretrojanuser-Joker
Infos:

Detection

Score:	68
Range:	0 - 100
Whitelisted:	false

Signatures

Antivirus / Scanner detection for submitted sample

Malicious sample detected (through community Yara rule)

Multi AV Scanner detection for submitted file

Machine Learning detection for sample

Detected TCP or UDP traffic on non-standard ports

Sample contains only a LOAD segment without any section mappings

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:	1586621
Start date and time:	2025-01-09 12:35:05 +01:00
Joe Sandbox product:	CloudBasic
Overall analysis duration:	0h 4m 18s
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:	x864433.elf
Detection:	MAL
Classification:	mal68.linELF@0/0@0/0

Runtime Messages

Command:	/tmp/x864433.elf
PID:	6219
Exit Code:	139
Exit Code Info:	SIGSEGV (11) Segmentation fault invalid memory reference
Killed:	False
Standard Output:
Standard Error:

Process Tree

system is lnxubuntu20

x864433.elf (PID: 6219, Parent: 6135, MD5: 1910f33ae648a237376a60c76f2bd61a) Arguments: /tmp/x864433.elf

cleanup

Yara Signatures

Initial Sample

Source	Rule	Description	Author	Strings
x864433.elf	Linux_Trojan_Getshell_98d002bf	unknown	unknown	0xb7:$a: B2 6A B0 03 CD 80 85 C0 78 02 FF E1 B8 01 00 00 00 BB 01 00

Memory Dumps

Source	Rule	Description	Author	Strings
6219.1.0000000008048000.0000000008049000.rwx.sdmp	Linux_Trojan_Getshell_98d002bf	unknown	unknown	0xb7:$a: B2 6A B0 03 CD 80 85 C0 78 02 FF E1 B8 01 00 00 00 BB 01 00

Suricata Signatures

⊘No Suricata rule has matched

Joe Sandbox Signatures

Click to jump to signature section

Show All Signature Results

AV Detection

Antivirus / Scanner detection for submitted sample

Source: x864433.elf

Avira: detected

Multi AV Scanner detection for submitted file

Source: x864433.elf	Virustotal: Detection: 51%			Perma Link
Source: x864433.elf	ReversingLabs: Detection: 63%

Machine Learning detection for sample

Source: x864433.elf

Joe Sandbox ML: detected

Source: global traffic

TCP traffic: 192.168.2.23:51568 -> 45.43.36.223:4433

Source: global traffic	TCP traffic: 192.168.2.23:43928 -> 91.189.91.42:443
Source: global traffic	TCP traffic: 192.168.2.23:42836 -> 91.189.91.43:443
Source: global traffic	TCP traffic: 192.168.2.23:42516 -> 109.202.202.202:80

Source: unknown	TCP traffic detected without corresponding DNS query: 45.43.36.223
Source: unknown	TCP traffic detected without corresponding DNS query: 45.43.36.223
Source: unknown	TCP traffic detected without corresponding DNS query: 45.43.36.223
Source: unknown	TCP traffic detected without corresponding DNS query: 45.43.36.223
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	TCP traffic detected without corresponding DNS query: 91.189.91.43

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: x864433.elf, type: SAMPLE	Matched rule: Linux_Trojan_Getshell_98d002bf Author: unknown
Source: 6219.1.0000000008048000.0000000008049000.rwx.sdmp, type: MEMORY	Matched rule: Linux_Trojan_Getshell_98d002bf Author: unknown

Source: LOAD without section mappings

Program segment: 0x8048000

Source: x864433.elf, type: SAMPLE	Matched rule: Linux_Trojan_Getshell_98d002bf reference_sample = 97b7650ab083f7ba23417e6d5d9c1d133b9158e2c10427d1f1e50dfe6c0e7541, os = linux, severity = x86, creation_date = 2021-01-12, scan_context = file, memory, license = Elastic License v2, threat_name = Linux.Trojan.Getshell, fingerprint = b7bfec0a3cfc05b87fefac6b10673491b611400edacf9519cbcc1a71842e9fa3, id = 98d002bf-63b7-4d11-98ef-c3127e68d59c, last_modified = 2021-09-16
Source: 6219.1.0000000008048000.0000000008049000.rwx.sdmp, type: MEMORY	Matched rule: Linux_Trojan_Getshell_98d002bf reference_sample = 97b7650ab083f7ba23417e6d5d9c1d133b9158e2c10427d1f1e50dfe6c0e7541, os = linux, severity = x86, creation_date = 2021-01-12, scan_context = file, memory, license = Elastic License v2, threat_name = Linux.Trojan.Getshell, fingerprint = b7bfec0a3cfc05b87fefac6b10673491b611400edacf9519cbcc1a71842e9fa3, id = 98d002bf-63b7-4d11-98ef-c3127e68d59c, last_modified = 2021-09-16

Source: classification engine

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

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	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 Non-Standard Port	Exfiltration Over Bluetooth	Network Denial of Service
Email Addresses	DNS Server	Domain Accounts	At	Logon Script (Windows)	Logon Script (Windows)	Obfuscated Files or Information	Security Account Manager	Query Registry	SMB/Windows Admin Shares	Data from Network Shared Drive	1 Application Layer Protocol	Automated Exfiltration	Data Encrypted for Impact

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

Screenshots

Thumbnails

This section contains all screenshots as thumbnails, including those not shown in the slideshow.

Antivirus, Machine Learning and Genetic Malware Detection

Initial Sample

Source	Detection	Scanner	Label	Link
x864433.elf	52%	Virustotal		Browse
x864433.elf	63%	ReversingLabs	Linux.Backdoor.GetShell
x864433.elf	100%	Avira	LINUX/Getshell.AR
x864433.elf	100%	Joe Sandbox ML

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
109.202.202.202	unknown	Switzerland	13030	INIT7CH	false
45.43.36.223	unknown	United States	135377	UHGL-AS-APUCloudHKHoldingsGroupLimitedHK	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
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
45.43.36.223	45678.elf	Get hash	malicious	Unknown	Browse
	aarch643308.elf	Get hash	malicious	Unknown	Browse
	mipsle44555.elf	Get hash	malicious	Unknown	Browse
	3344.exe	Get hash	malicious	Metasploit	Browse
	m.elf	Get hash	malicious	Unknown	Browse
	5544x64.elf	Get hash	malicious	ConnectBack	Browse
	shell64.elf	Get hash	malicious	ConnectBack	Browse
91.189.91.43	sst.elf	Get hash	malicious	Gafgyt	Browse
	ssx.elf	Get hash	malicious	Gafgyt	Browse
	sss.elf	Get hash	malicious	Gafgyt	Browse
	12.elf	Get hash	malicious	Unknown	Browse
	Aqua.mpsl.elf	Get hash	malicious	Mirai	Browse
	2.elf	Get hash	malicious	Unknown	Browse
	main_ppc.elf	Get hash	malicious	Mirai	Browse
	a-r.m-5.Sakura.elf	Get hash	malicious	Gafgyt, Mirai	Browse
	ssl.elf	Get hash	malicious	Gafgyt	Browse
	ssx.elf	Get hash	malicious	Gafgyt	Browse
91.189.91.42	sst.elf	Get hash	malicious	Gafgyt	Browse
	ssx.elf	Get hash	malicious	Gafgyt	Browse
	sss.elf	Get hash	malicious	Gafgyt	Browse
	12.elf	Get hash	malicious	Unknown	Browse
	Aqua.mpsl.elf	Get hash	malicious	Mirai	Browse
	2.elf	Get hash	malicious	Unknown	Browse
	main_ppc.elf	Get hash	malicious	Mirai	Browse
	a-r.m-5.Sakura.elf	Get hash	malicious	Gafgyt, Mirai	Browse
	ssl.elf	Get hash	malicious	Gafgyt	Browse
	ssx.elf	Get hash	malicious	Gafgyt	Browse

Domains

⊘No context

ASNs

Match	Associated Sample Name / URL	SHA 256	Detection	Threat Name	Link	Context
CANONICAL-ASGB	sst.elf	Get hash	malicious	Gafgyt	Browse	91.189.91.42
	ssx.elf	Get hash	malicious	Gafgyt	Browse	91.189.91.42
	sss.elf	Get hash	malicious	Gafgyt	Browse	91.189.91.42
	12.elf	Get hash	malicious	Unknown	Browse	91.189.91.42
	Aqua.mpsl.elf	Get hash	malicious	Mirai	Browse	91.189.91.42
	2.elf	Get hash	malicious	Unknown	Browse	91.189.91.42
	main_ppc.elf	Get hash	malicious	Mirai	Browse	91.189.91.42
	a-r.m-5.Sakura.elf	Get hash	malicious	Gafgyt, Mirai	Browse	91.189.91.42
	ssl.elf	Get hash	malicious	Gafgyt	Browse	91.189.91.42
	ssx.elf	Get hash	malicious	Gafgyt	Browse	91.189.91.42
CANONICAL-ASGB	sst.elf	Get hash	malicious	Gafgyt	Browse	91.189.91.42
	ssx.elf	Get hash	malicious	Gafgyt	Browse	91.189.91.42
	sss.elf	Get hash	malicious	Gafgyt	Browse	91.189.91.42
	12.elf	Get hash	malicious	Unknown	Browse	91.189.91.42
	Aqua.mpsl.elf	Get hash	malicious	Mirai	Browse	91.189.91.42
	2.elf	Get hash	malicious	Unknown	Browse	91.189.91.42
	main_ppc.elf	Get hash	malicious	Mirai	Browse	91.189.91.42
	a-r.m-5.Sakura.elf	Get hash	malicious	Gafgyt, Mirai	Browse	91.189.91.42
	ssl.elf	Get hash	malicious	Gafgyt	Browse	91.189.91.42
	ssx.elf	Get hash	malicious	Gafgyt	Browse	91.189.91.42
INIT7CH	sst.elf	Get hash	malicious	Gafgyt	Browse	109.202.202.202
	ssx.elf	Get hash	malicious	Gafgyt	Browse	109.202.202.202
	sss.elf	Get hash	malicious	Gafgyt	Browse	109.202.202.202
	12.elf	Get hash	malicious	Unknown	Browse	109.202.202.202
	Aqua.mpsl.elf	Get hash	malicious	Mirai	Browse	109.202.202.202
	2.elf	Get hash	malicious	Unknown	Browse	109.202.202.202
	main_ppc.elf	Get hash	malicious	Mirai	Browse	109.202.202.202
	a-r.m-5.Sakura.elf	Get hash	malicious	Gafgyt, Mirai	Browse	109.202.202.202
	ssl.elf	Get hash	malicious	Gafgyt	Browse	109.202.202.202
	ssx.elf	Get hash	malicious	Gafgyt	Browse	109.202.202.202
UHGL-AS-APUCloudHKHoldingsGroupLimitedHK	45678.elf	Get hash	malicious	Unknown	Browse	45.43.36.223
	aarch643308.elf	Get hash	malicious	Unknown	Browse	45.43.36.223
	mipsle44555.elf	Get hash	malicious	Unknown	Browse	45.43.36.223
	Mmt4YaKg5u.exe	Get hash	malicious	Unknown	Browse	107.150.123.235
	3344.exe	Get hash	malicious	Metasploit	Browse	45.43.36.223
	m.elf	Get hash	malicious	Unknown	Browse	45.43.36.223
	5544x64.elf	Get hash	malicious	ConnectBack	Browse	45.43.36.223
	rebirth.mpsl.elf	Get hash	malicious	Mirai, Okiru	Browse	128.1.49.123
	ORDER-401.exe	Get hash	malicious	FormBook	Browse	107.155.56.30
	MAERSK LINE SHIPPING DOC_4253.exe	Get hash	malicious	FormBook	Browse	107.155.56.30

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, Intel 80386, version 1 (SYSV), statically linked, no section header
Entropy (8bit):	4.713199391174593
TrID:	ELF Executable and Linkable format (generic) (4004/1) 100.00%
File name:	x864433.elf
File size:	207 bytes
MD5:	1910f33ae648a237376a60c76f2bd61a
SHA1:	8646c9862404a1d6090e9e883b9f6f2c53674d22
SHA256:	198a0922f19f098abb5800a89f581aab8021e74d7b824156a3027b7f3c0e7048
SHA512:	95ac879d51c360a8410f64f6713ff56e2b6f208eea8ffe2426bc1bd904f6f97d065eef08ca11a38580041c8b1a65cfd408b701e3b3b355b8438ec7f8cd964973
SSDEEP:	3:Bkkk/tMlwXll/O/slrCs4X1lFrSwfOHuuIM8IPNioOHyUvwGcVt6fE2:Btk/tMl//E2s4COuIKQXSEwhVYfE2
TLSH:	8BD08041C1529143C07CDA3975146F5F1724C22B81501F6623D56BC8CCEA9540E31F14
File Content Preview:	.ELF....................T...4...........4. .............................J...........j.^1...SCSj..f.....[h-+$.h...Q..jfXPQW..C....y.Nt=h....Xj.j...1.....y..'................}....x.[....j......x...............

Static ELF Info

ELF header
Class:	ELF32
Data:	2's complement, little endian
Version:	1 (current)
Machine:	Intel 80386
Version Number:	0x1
Type:	EXEC (Executable file)
OS/ABI:	UNIX - System V
ABI Version:	0
Entry Point Address:	0x8048054
Flags:	0x0
ELF Header Size:	52
Program Header Offset:	52
Program Header Size:	32
Number of Program Headers:	1
Section Header Offset:	0
Section Header Size:	0
Number of Section Headers:	0
Header String Table Index:	0

Program Segments

Type	Offset	Virtual Address	Physical Address	File Size	Memory Size	Entropy	Flags	Flags Description	Align	Prog Interpreter	Section Mappings
LOAD	0x0	0x8048000	0x8048000	0xcf	0x14a	4.7132	0x7	RWE	0x1000

Network Behavior

Network Port Distribution

TCP Packets

Timestamp	Source Port	Dest Port	Source IP	Dest IP
Jan 9, 2025 12:35:41.487978935 CET	51568	4433	192.168.2.23	45.43.36.223
Jan 9, 2025 12:35:41.492906094 CET	4433	51568	45.43.36.223	192.168.2.23
Jan 9, 2025 12:35:41.492960930 CET	51568	4433	192.168.2.23	45.43.36.223
Jan 9, 2025 12:35:43.514578104 CET	4433	51568	45.43.36.223	192.168.2.23
Jan 9, 2025 12:35:43.516220093 CET	51568	4433	192.168.2.23	45.43.36.223
Jan 9, 2025 12:35:43.675309896 CET	51568	4433	192.168.2.23	45.43.36.223
Jan 9, 2025 12:35:43.680170059 CET	4433	51568	45.43.36.223	192.168.2.23
Jan 9, 2025 12:35:43.968158960 CET	43928	443	192.168.2.23	91.189.91.42
Jan 9, 2025 12:35:49.343563080 CET	42836	443	192.168.2.23	91.189.91.43
Jan 9, 2025 12:35:50.879338980 CET	42516	80	192.168.2.23	109.202.202.202
Jan 9, 2025 12:36:05.213289022 CET	43928	443	192.168.2.23	91.189.91.42
Jan 9, 2025 12:36:15.451919079 CET	42836	443	192.168.2.23	91.189.91.43
Jan 9, 2025 12:36:21.595067978 CET	42516	80	192.168.2.23	109.202.202.202
Jan 9, 2025 12:36:46.167846918 CET	43928	443	192.168.2.23	91.189.91.42
Jan 9, 2025 12:37:06.644985914 CET	42836	443	192.168.2.23	91.189.91.43

System Behavior

Analysis Process: x864433.elf PID: 6219, Parent PID: 6135

General

Start time (UTC):	11:35:40
Start date (UTC):	09/01/2025
Path:	/tmp/x864433.elf
Arguments:	/tmp/x864433.elf
File size:	207 bytes
MD5 hash:	1910f33ae648a237376a60c76f2bd61a

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 a protocol and port pairing that are typically not associated. For example, HTTPS over port 8088or port 587as opposed to the traditional port 443. Adversaries may make changes to the standard port used by a protocol to bypass filtering or muddle analysis/parsing of network data.
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

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

Loading Joe Sandbox Report ...

Warning!

Linux Analysis Report x864433.elf

Overview

General Information

Detection

Signatures

Classification

General Information

Runtime Messages

Process Tree

Yara Signatures

Initial Sample

Memory Dumps

Suricata Signatures

Joe Sandbox Signatures

AV Detection

Networking

System Summary

Mitre Att&ck Matrix

Malware Configuration

Behavior Graph

Screenshots

Thumbnails

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

Program Segments

Network Behavior

Network Port Distribution

TCP Packets

System Behavior

Analysis Process: x864433.elf PID: 6219, Parent PID: 6135

General

Linux Analysis Report
x864433.elf