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Linux Analysis Report
mipsel.elf

Overview

General Information

Sample name:	mipsel.elf
Analysis ID:	1544066
MD5:	b273d21df6a48d1d2d29b1f785f8c25e
SHA1:	c044d8d910ec0a2b2870086f5737dc035dff12b0
SHA256:	46c7f4cb6c058dc810da6b4d5bc970cc52effd1f6d58308d02c18ba51ef1c591
Tags:	elfuser-abuse_ch

Detection

Score:	52
Range:	0 - 100
Whitelisted:	false

Signatures

Multi AV Scanner detection for submitted file

Sample is packed with UPX

ELF contains segments with high entropy indicating compressed/encrypted content

Sample contains only a LOAD segment without any section mappings

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

Classification

General Information

Joe Sandbox version:	41.0.0 Charoite
Analysis ID:	1544066
Start date and time:	2024-10-28 19:23:12 +01:00
Joe Sandbox product:	CloudBasic
Overall analysis duration:	0h 4m 29s
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:	mipsel.elf
Detection:	MAL
Classification:	mal52.evad.linELF@0/0@0/0

Warnings

VT rate limit hit for: mipsel.elf

Runtime Messages

Command:	/tmp/mipsel.elf
PID:	5495
Exit Code:	2
Exit Code Info:
Killed:	False
Standard Output:
Standard Error:	fatal error: sigaction failed runtime stack: runtime.throw({0x382b3f, 0x10}) C:/Program Files/Go/src/runtime/panic.go:1077 +0x54 fp=0x7fffecdc sp=0x7fffecc8 pc=0x5a40c runtime.sysSigaction.func1() C:/Program Files/Go/src/runtime/os_linux.go:560 +0x4c fp=0x7fffece8 sp=0x7fffecdc pc=0x95d64 runtime.sysSigaction(0x41, 0x7fffed10, 0x0) C:/Program Files/Go/src/runtime/os_linux.go:559 +0x7c fp=0x7fffed00 sp=0x7fffece8 pc=0x569dc runtime.sigaction(...) C:/Program Files/Go/src/runtime/sigaction.go:15 runtime.setsig(0x41, 0x78f80) C:/Program Files/Go/src/runtime/os_linux.go:507 +0xbc fp=0x7fffed2c sp=0x7fffed00 pc=0x568a8 runtime.initsig(0x0) C:/Program Files/Go/src/runtime/signal_unix.go:148 +0x2c0 fp=0x7fffed68 sp=0x7fffed2c pc=0x785cc runtime.mstartm0() C:/Program Files/Go/src/runtime/proc.go:1624 +0x70 fp=0x7fffed70 sp=0x7fffed68 pc=0x62394 runtime.mstart1() C:/Program Files/Go/src/runtime/proc.go:1596 +0x94 fp=0x7fffed80 sp=0x7fffed70 pc=0x6228c runtime.mstart0() C:/Program Files/Go/src/runtime/proc.go:1557 +0x7c fp=0x7fffed94 sp=0x7fffed80 pc=0x621d8 runtime.mstart() C:/Program Files/Go/src/runtime/asm_mipsx.s:89 +0x14 fp=0x7fffed98 sp=0x7fffed94 pc=0x9d424 goroutine 1 [runnable]: runtime.main() C:/Program Files/Go/src/runtime/proc.go:144 fp=0x5b4227ec sp=0x5b4227ec pc=0x5e2f0 runtime.goexit() C:/Program Files/Go/src/runtime/asm_mipsx.s:641 +0x4 fp=0x5b4227ec sp=0x5b4227ec pc=0x9f858

Process Tree

system is lnxubuntu20

mipsel.elf (PID: 5495, Parent: 5419, MD5: 0d6f61f82cf2f781c6eb0661071d42d9) Arguments: /tmp/mipsel.elf

cleanup

Yara Signatures

⊘No yara matches

Suricata Signatures

⊘No Suricata 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: mipsel.elf

ReversingLabs: Detection: 15%

Source: mipsel.elf, 5495.1.00007f3fb4540000.00007f3fb45a7000.rw-.sdmp	String found in binary or memory: http://.css
Source: mipsel.elf, 5495.1.00007f3fb4540000.00007f3fb45a7000.rw-.sdmp	String found in binary or memory: http://.jpg
Source: mipsel.elf, 5495.1.00007f3fb4540000.00007f3fb45a7000.rw-.sdmp	String found in binary or memory: http://html4/loose.dtd
Source: mipsel.elf	String found in binary or memory: http://upx.sf.net

Source: LOAD without section mappings

Program segment: 0x10000

Source: mipsel.elf

Binary or memory string: 'oh.SlNA

Source: classification engine

Classification label: mal52.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: mipsel.elf

Submission file: segment LOAD with 7.8845 entropy (max. 8.0)

Source: /tmp/mipsel.elf (PID: 5495)

Queries kernel information via 'uname':

Jump to behavior

Source: mipsel.elf, 5495.1.000055d3cdde6000.000055d3ce0e9000.rw-.sdmp	Binary or memory string: /etc/qemu-binfmt/mipsel
Source: mipsel.elf, 5495.1.000055d3cdde6000.000055d3ce0e9000.rw-.sdmp	Binary or memory string: U!/etc/qemu-binfmt/mipsel
Source: mipsel.elf, 5495.1.00007fff430d6000.00007fff430f7000.rw-.sdmp	Binary or memory string: x86_64/usr/bin/qemu-mipsel/tmp/mipsel.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/mipsel.elf
Source: mipsel.elf, 5495.1.00007fff430d6000.00007fff430f7000.rw-.sdmp	Binary or memory string: /usr/bin/qemu-mipsel

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	11 Obfuscated Files or Information	OS Credential Dumping	11 Security Software Discovery	Remote Services	Data from Local System	Data Obfuscation	Exfiltration Over Other Network Medium	Abuse Accessibility Features

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
mipsel.elf	16%	ReversingLabs	Linux.Trojan.Generic

Dropped Files

⊘No Antivirus matches

Domains

⊘No Antivirus matches

URLs

Source	Detection	Scanner	Label	Link
http://upx.sf.net	0%	URL Reputation	safe

Domains and IPs

Contacted Domains

⊘No contacted domains info

URLs from Memory and Binaries

Name	Source	Malicious	Antivirus Detection	Reputation
http://html4/loose.dtd	mipsel.elf, 5495.1.00007f3fb4540000.00007f3fb45a7000.rw-.sdmp	false		unknown
http://upx.sf.net	mipsel.elf	true	URL Reputation: safe	unknown
http://.css	mipsel.elf, 5495.1.00007f3fb4540000.00007f3fb45a7000.rw-.sdmp	false		unknown
http://.jpg	mipsel.elf, 5495.1.00007f3fb4540000.00007f3fb45a7000.rw-.sdmp	false		unknown

World Map of Contacted IPs

⊘No contacted IP infos

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, MIPS, MIPS32 version 1 (SYSV), statically linked, no section header
Entropy (8bit):	7.884424247978719
TrID:	ELF Executable and Linkable format (generic) (4004/1) 100.00%
File name:	mipsel.elf
File size:	1'824'684 bytes
MD5:	b273d21df6a48d1d2d29b1f785f8c25e
SHA1:	c044d8d910ec0a2b2870086f5737dc035dff12b0
SHA256:	46c7f4cb6c058dc810da6b4d5bc970cc52effd1f6d58308d02c18ba51ef1c591
SHA512:	aa57ad63fda1657ea145458cc0bcbb63b1cb083658782f16c0ddf12bed6372f1735e824b0b870cf2a4328683e00169fddcdf4e2650ea0d969ba01bf6341173c1
SSDEEP:	49152:ayYujGZpfmkpue3HULl8OdqaIGxkAwoS8:aaGTekMgulsa3xJa8
TLSH:	4E8533EE4705A8E45BECDB2837A7ABA0981FD89C1480DC790A4F71673973F3996B104D
File Content Preview:	.ELF........................4..........P4. ...(....................."..."................h...hZ..hZ.....................UPX!..........X...X.............w....ELF...............4......P. ...(........{.4.......\.t.......d.....M......0.'._.l?1.2t.!..F..?S.T.2

Static ELF Info

ELF header
Class:	ELF32
Data:	2's complement, little endian
Version:	1 (current)
Machine:	MIPS R3000
Version Number:	0x1
Type:	EXEC (Executable file)
OS/ABI:	UNIX - System V
ABI Version:	0
Entry Point Address:	0x1ccda8
Flags:	0x50001004
ELF Header Size:	52
Program Header Offset:	52
Program Header Size:	32
Number of Program Headers:	2
Section Header Offset:	0
Section Header Size:	40
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	0x10000	0x10000	0x1bd722	0x1bd722	7.8845	0x5	R E	0x10000
LOAD	0x68e8	0x5a68e8	0x5a68e8	0x0	0x0	0.0000	0x6	RW	0x10000

Network Behavior

⊘No network behavior found

System Behavior

Analysis Process: mipsel.elf PID: 5495, Parent PID: 5419

General

Start time (UTC):	18:23:58
Start date (UTC):	28/10/2024
Path:	/tmp/mipsel.elf
Arguments:	/tmp/mipsel.elf
File size:	5773336 bytes
MD5 hash:	0d6f61f82cf2f781c6eb0661071d42d9

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:	Command: Command Execution, File: File Creation, File: File Metadata, Module: Module Load, Process: OS API Execution, Process: Process Creation, Script: Script Execution, WMI: WMI Creation, Windows Registry: Windows Registry Key Creation
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:	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

Behavior Section

Behavior Chronological

Disassembly

Uncategorized

Graph

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Linux Analysis Report mipsel.elf

Overview

General Information

Detection

Signatures

Classification

General Information

Warnings

Runtime Messages

Process Tree

Yara Signatures

Suricata Signatures

Joe Sandbox Signatures

AV Detection

Networking

System Summary

Data Obfuscation

Hooking and other Techniques for Hiding and Protection

Malware Analysis System Evasion

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

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

Static ELF Info

ELF header

Program Segments

Network Behavior

System Behavior

Analysis Process: mipsel.elf PID: 5495, Parent PID: 5419

General

Chronological Activities

Linux Analysis Report
mipsel.elf