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Linux Analysis Report
8LzAAQOA5F.elf

Overview

General Information

Sample Name:	8LzAAQOA5F.elf
Analysis ID:	755691
MD5:	0654cfa752abc860f437ffd2d47829b0
SHA1:	e1b136b7457e5210de12822df56a8e4a276073b5
SHA256:	110f671bf87c7f2ff4baa1c4d7a560a98a53c3cf1449e099f00302a8a4cc5b31
Tags:	32armelfmirai
Infos:

Detection

Mirai

Score:	68
Range:	0 - 100
Whitelisted:	false

Signatures

Malicious sample detected (through community Yara rule)

Yara detected Mirai

Multi AV Scanner detection for submitted file

Sample is packed with UPX

Sample contains only a LOAD segment without any section mappings

Yara signature match

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

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

ELF contains segments with high entropy indicating compressed/encrypted content

Classification

Analysis Advice

Static ELF header machine description suggests that the sample might not execute correctly on this machine.

Exit code information suggests that the sample terminated abnormally, try to lookup the sample's target architecture.

All HTTP servers contacted by the sample do not answer. The sample is likely an old dropper which does no longer work.

Non-zero exit code suggests an error during the execution. Lookup the error code for hints.

Static ELF header machine description suggests that the sample might only run correctly on MIPS or ARM architectures.

General Information

Joe Sandbox Version:	36.0.0 Rainbow Opal
Analysis ID:	755691
Start date and time:	2022-11-29 02:16:05 +01:00
Joe Sandbox Product:	CloudBasic
Overall analysis duration:	0h 5m 0s
Hypervisor based Inspection enabled:	false
Report type:	light
Sample file name:	8LzAAQOA5F.elf
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
Detection:	MAL
Classification:	mal68.troj.evad.linELF@0/0@0/0

Runtime Messages

Command:	/tmp/8LzAAQOA5F.elf
PID:	6222
Exit Code:	139
Exit Code Info:	SIGSEGV (11) Segmentation fault invalid memory reference
Killed:	False
Standard Output:
Standard Error:	qemu: uncaught target signal 11 (Segmentation fault) - core dumped

Process Tree

system is lnxubuntu20

8LzAAQOA5F.elf (PID: 6222, Parent: 6119, MD5: 5ebfcae4fe2471fcc5695c2394773ff1) Arguments: /tmp/8LzAAQOA5F.elf

cleanup

Yara Signatures

Initial Sample

Source	Rule	Description	Author	Strings
8LzAAQOA5F.elf	SUSP_ELF_LNX_UPX_Compressed_File	Detects a suspicious ELF binary with UPX compression	Florian Roth	0x78e4:$s1: PROT_EXEC\|PROT_WRITE failed. 0x7953:$s2: $Id: UPX 0x7904:$s3: $Info: This file is packed with the UPX executable packer

Memory Dumps

Source	Rule	Description	Author	Strings
6222.1.00007fee30017000.00007fee3002b000.r-x.sdmp	SUSP_XORed_Mozilla	Detects suspicious single byte XORed keyword \'Mozilla/5.0\' - it uses yara\'s XOR modifier and therefore cannot print the XOR key. You can use the CyberChef recipe linked in the reference field to brute force the used key.	Florian Roth	0x12930:$xo1: oMXKNNC\x0D\x17\x0C\x12 0x129a0:$xo1: oMXKNNC\x0D\x17\x0C\x12 0x12a10:$xo1: oMXKNNC\x0D\x17\x0C\x12 0x12a80:$xo1: oMXKNNC\x0D\x17\x0C\x12 0x12af0:$xo1: oMXKNNC\x0D\x17\x0C\x12 0x12d60:$xo1: oMXKNNC\x0D\x17\x0C\x12 0x12db4:$xo1: oMXKNNC\x0D\x17\x0C\x12 0x12e08:$xo1: oMXKNNC\x0D\x17\x0C\x12 0x12e5c:$xo1: oMXKNNC\x0D\x17\x0C\x12 0x12eb0:$xo1: oMXKNNC\x0D\x17\x0C\x12
6222.1.00007fee30017000.00007fee3002b000.r-x.sdmp	MAL_ELF_LNX_Mirai_Oct10_2	Detects ELF malware Mirai related	Florian Roth	0x1223c:$c01: 50 4F 53 54 20 2F 63 64 6E 2D 63 67 69 2F 00 00 20 48 54 54 50 2F 31 2E 31 0D 0A 55 73 65 72 2D 41 67 65 6E 74 3A 20 00 0D 0A 48 6F 73 74 3A
6222.1.00007fee30017000.00007fee3002b000.r-x.sdmp	JoeSecurity_Mirai_5	Yara detected Mirai	Joe Security

Snort Signatures

⊘No Snort 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: 8LzAAQOA5F.elf	ReversingLabs: Detection: 50%
Source: 8LzAAQOA5F.elf	Virustotal: Detection: 44%			Perma Link

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: global traffic	TCP traffic: 192.168.2.23:43928 -> 91.189.91.42:443

Source: unknown	Network traffic detected: HTTP traffic on port 43928 -> 443
Source: unknown	Network traffic detected: HTTP traffic on port 42836 -> 443

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: 119.139.3.57
Source: unknown	TCP traffic detected without corresponding DNS query: 91.189.91.42
Source: unknown	TCP traffic detected without corresponding DNS query: 125.41.80.140

Source: 8LzAAQOA5F.elf

String found in binary or memory: http://upx.sf.net

System Summary

Malicious sample detected (through community Yara rule)

Source: 6222.1.00007fee30017000.00007fee3002b000.r-x.sdmp, type: MEMORY

Matched rule: Detects ELF malware Mirai related Author: Florian Roth

Source: LOAD without section mappings

Program segment: 0x8000

Source: 8LzAAQOA5F.elf, type: SAMPLE	Matched rule: SUSP_ELF_LNX_UPX_Compressed_File date = 2018-12-12, author = Florian Roth, description = Detects a suspicious ELF binary with UPX compression, score = 038ff8b2fef16f8ee9d70e6c219c5f380afe1a21761791e8cbda21fa4d09fdb4, reference = Internal Research
Source: 6222.1.00007fee30017000.00007fee3002b000.r-x.sdmp, type: MEMORY	Matched rule: SUSP_XORed_Mozilla date = 2019-10-28, author = Florian Roth, description = Detects suspicious single byte XORed keyword \'Mozilla/5.0\' - it uses yara\'s XOR modifier and therefore cannot print the XOR key. You can use the CyberChef recipe linked in the reference field to brute force the used key., score = , reference = https://gchq.github.io/CyberChef/#recipe=XOR_Brute_Force(), modified = 2022-05-13
Source: 6222.1.00007fee30017000.00007fee3002b000.r-x.sdmp, type: MEMORY	Matched rule: MAL_ELF_LNX_Mirai_Oct10_2 date = 2018-10-27, hash1 = fa0018e75f503f9748a5de0d14d4358db234f65e28c31c8d5878cc58807081c9, author = Florian Roth, description = Detects ELF malware Mirai related, reference = Internal Research

Source: classification engine

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

Data Obfuscation

Sample is packed with UPX

Source: initial sample	String containing UPX found: $Info: This file is packed with the UPX executable packer http://upx.sf.net $
Source: initial sample	String containing UPX found: $Info: This file is packed with the UPX executable packer http://upx.sf.net $
Source: initial sample	String containing UPX found: $Id: UPX 3.94 Copyright (C) 1996-2017 the UPX Team. All Rights Reserved. $

Source: 8LzAAQOA5F.elf

Submission file: segment LOAD with 7.9601 entropy (max. 8.0)

Source: /tmp/8LzAAQOA5F.elf (PID: 6222)

Queries kernel information via 'uname':

Source: 8LzAAQOA5F.elf, 6222.1.000055cbcab0e000.000055cbcad3c000.rw-.sdmp	Binary or memory string: U!/etc/qemu-binfmt/arm
Source: 8LzAAQOA5F.elf, 6222.1.00007fff03edf000.00007fff03f00000.rw-.sdmp	Binary or memory string: x86_64/usr/bin/qemu-arm/tmp/8LzAAQOA5F.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/8LzAAQOA5F.elf
Source: 8LzAAQOA5F.elf, 6222.1.000055cbcab0e000.000055cbcad3c000.rw-.sdmp	Binary or memory string: /etc/qemu-binfmt/arm
Source: 8LzAAQOA5F.elf, 6222.1.00007fff03edf000.00007fff03f00000.rw-.sdmp	Binary or memory string: /usr/bin/qemu-arm
Source: 8LzAAQOA5F.elf, 6222.1.00007fff03edf000.00007fff03f00000.rw-.sdmp	Binary or memory string: qemu: uncaught target signal 11 (Segmentation fault) - core dumped

Stealing of Sensitive Information

Yara detected Mirai

Source: Yara match

File source: 6222.1.00007fee30017000.00007fee3002b000.r-x.sdmp, type: MEMORY

Remote Access Functionality

Yara detected Mirai

Source: Yara match

File source: 6222.1.00007fee30017000.00007fee3002b000.r-x.sdmp, type: MEMORY

Mitre Att&ck Matrix

Initial Access	Execution	Persistence	Privilege Escalation	Defense Evasion	Credential Access	Discovery	Lateral Movement	Collection	Exfiltration	Command and Control	Network Effects	Remote Service Effects	Impact
Valid Accounts	Windows Management Instrumentation	Path Interception	Path Interception	11 Obfuscated Files or Information	OS Credential Dumping	11 Security Software Discovery	Remote Services	Data from Local System	Exfiltration Over Other Network Medium	1 Encrypted Channel	Eavesdrop on Insecure Network Communication	Remotely Track Device Without Authorization	Modify System Partition
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	Exfiltration Over Bluetooth	1 Application Layer Protocol	Exploit SS7 to Redirect Phone Calls/SMS	Remotely Wipe Data Without Authorization	Device Lockout

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
8LzAAQOA5F.elf	50%	ReversingLabs	Linux.Trojan.Mirai
8LzAAQOA5F.elf	44%	Virustotal		Browse

Dropped Files

⊘No Antivirus matches

Domains

⊘No Antivirus matches

URLs

⊘No Antivirus matches

Domains and IPs

Contacted Domains

⊘No contacted domains info

URLs from Memory and Binaries

Name	Source	Malicious	Antivirus Detection	Reputation
http://upx.sf.net	8LzAAQOA5F.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
119.139.3.57	unknown	China	4134	CHINANET-BACKBONENo31Jin-rongStreetCN	false
125.41.80.140	unknown	China	4837	CHINA169-BACKBONECHINAUNICOMChina169BackboneCN	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

⊘No context

Domains

⊘No context

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 32-bit LSB executable, ARM, EABI4 version 1 (GNU/Linux), statically linked, no section header
Entropy (8bit):	7.95734341882964
TrID:	ELF Executable and Linkable format (generic) (4004/1) 100.00%
File name:	8LzAAQOA5F.elf
File size:	33028
MD5:	0654cfa752abc860f437ffd2d47829b0
SHA1:	e1b136b7457e5210de12822df56a8e4a276073b5
SHA256:	110f671bf87c7f2ff4baa1c4d7a560a98a53c3cf1449e099f00302a8a4cc5b31
SHA512:	4fba06a4b3a51aa1dcb7673f8821db0d100ae5e674c4f45561d8560681cdcdb7163036b801fef36fba044d197f948b21fe36ed47da59eb1a1a1e6704ef9f7236
SSDEEP:	768:9oiWiO031vpAPbrVWZK3XVGxm9XoF9q3UEL5I5:9orm1vpALgUJLLm
TLSH:	75E2F153D372A492DD782AF1F95D89C72BBD4F6CD17B70A216016B2C2E9A0439B3C843
File Content Preview:	.ELF..............(.........4...........4. ...(..........................................[..........................Q.td............................>. NUPX!.........8...8......T..........?.E.h;....#..$..1)...I<.1x9h.=60$.{5.4.C.$..}.H....<.o.......U...4..

Static ELF Info

ELF header
Class:
Data:
Version:
Machine:
Version Number:
Type:
OS/ABI:
ABI Version:
Entry Point Address:
Flags:
ELF Header Size:
Program Header Offset:
Program Header Size:
Number of Program Headers:
Section Header Offset:
Section Header Size:
Number of Section Headers:
Header String Table Index:

Program Segments

Type	Offset	Virtual Address	Physical Address	File Size	Memory Size	Entropy	Flags	Flags Description	Align
LOAD	0x0	0x8000	0x8000	0x7fdd	0x7fdd	7.9601	0x5	R E	0x8000
LOAD	0x5b18	0x2db18	0x2db18	0x0	0x0	0.0000	0x6	RW	0x8000
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
Nov 29, 2022 02:16:52.179497957 CET	42836	443	192.168.2.23	91.189.91.43
Nov 29, 2022 02:16:52.947679996 CET	42516	80	192.168.2.23	109.202.202.202
Nov 29, 2022 02:17:07.282974958 CET	43928	443	192.168.2.23	91.189.91.42
Nov 29, 2022 02:17:19.570324898 CET	42836	443	192.168.2.23	91.189.91.43
Nov 29, 2022 02:17:23.666085958 CET	42516	80	192.168.2.23	109.202.202.202
Nov 29, 2022 02:17:38.405519009 CET	23	36324	119.139.3.57	192.168.2.23
Nov 29, 2022 02:17:38.405736923 CET	36324	23	192.168.2.23	119.139.3.57
Nov 29, 2022 02:17:48.240734100 CET	43928	443	192.168.2.23	91.189.91.42
Nov 29, 2022 02:18:02.462579012 CET	23	55366	125.41.80.140	192.168.2.23
Nov 29, 2022 02:18:02.462865114 CET	55366	23	192.168.2.23	125.41.80.140

System Behavior

Analysis Process: 8LzAAQOA5F.elf PID: 6222, Parent PID: 6119

General

Start time:	02:16:48
Start date:	29/11/2022
Path:	/tmp/8LzAAQOA5F.elf
Arguments:	/tmp/8LzAAQOA5F.elf
File size:	4956856 bytes
MD5 hash:	5ebfcae4fe2471fcc5695c2394773ff1

Description:	Adversaries may attempt to make an executable or file difficult to discover or analyze by encrypting, encoding, or otherwise obfuscating its contents on the system or in transit. This is common behavior that can be used across different platforms and the network to evade defenses.
Tactics:	Defense Evasion
Data Sources:	Binary file metadata, Email gateway, Environment variable, File monitoring, Malware reverse engineering, Network intrusion detection system, Network protocol analysis, Process command-line parameters, Process monitoring, Process use of network, SSL/TLS inspection, Windows event logs
Platforms:	Linux, macOS, Windows
Url:	Open detailed description by Mitre

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:	AWS CloudTrail logs, Azure activity logs, File monitoring, Process command-line parameters, Process monitoring, Stackdriver logs
Platforms:	AWS, Azure, Azure AD, GCP, 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:	Malware reverse engineering, Netflow/Enclave netflow, Packet capture, Process monitoring, Process use of network, SSL/TLS inspection
Platforms:	Linux, macOS, Windows
Url:	Open detailed description by Mitre

Description:	Adversaries may communicate using 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:	DNS records, Netflow/Enclave netflow, Network protocol analysis, Packet capture, Process monitoring, Process use of network
Platforms:	Linux, macOS, Windows
Url:	Open detailed description by Mitre

Behavior Section

Behavior Chronological

Disassembly

Uncategorized

Graph

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Linux Analysis Report 8LzAAQOA5F.elf

Overview

General Information

Detection

Signatures

Classification

Analysis Advice

General Information

Runtime Messages

Process Tree

Yara Signatures

Initial Sample

Memory Dumps

Snort Signatures

Joe Sandbox Signatures

AV Detection

Networking

System Summary

Data Obfuscation

Hooking and other Techniques for Hiding and Protection

Malware Analysis System Evasion

Stealing of Sensitive Information

Remote Access Functionality

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

Static ELF Info

ELF header

Program Segments

Network Behavior

Network Port Distribution

TCP Packets

System Behavior

Analysis Process: 8LzAAQOA5F.elf PID: 6222, Parent PID: 6119

General

Linux Analysis Report
8LzAAQOA5F.elf