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Linux Analysis Report
arm5.elf

Overview

General Information

Sample name:arm5.elf
Analysis ID:1646133
MD5:5c5594976ba23697c410e1be2b3845d3
SHA1:736a24683b40ac15607b4a8808050f8fc426fde7
SHA256:10b40ef6ee67fb22cbe03c35b19bf09e2039d4771a95d16d5be2c3fa5447eb13
Tags:elfuser-abuse_ch
Infos:

Detection

Score:52
Range:0 - 100

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
Tries to connect to HTTP servers, but all servers are down (expired dropper behavior)
Uses the "uname" system call to query kernel version information (possible evasion)

Classification

RansomwareSpreadingPhishingBankerTrojan / BotAdwareSpywareExploiterEvaderMinercleansuspiciousmalicious
Joe Sandbox version:42.0.0 Malachite
Analysis ID:1646133
Start date and time:2025-03-23 12:16:17 +01:00
Joe Sandbox product:CloudBasic
Overall analysis duration:0h 4m 36s
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:arm5.elf
Detection:MAL
Classification:mal52.evad.linELF@0/0@0/0
Command:/tmp/arm5.elf
PID:5494
Exit Code:127
Exit Code Info:
Killed:False
Standard Output:

Standard Error:
  • system is lnxubuntu20
  • arm5.elf (PID: 5494, Parent: 5414, MD5: 5ebfcae4fe2471fcc5695c2394773ff1) Arguments: /tmp/arm5.elf
  • cleanup
No yara matches
No Suricata rule has matched

Click to jump to signature section

Show All Signature Results

AV Detection

barindex
Source: arm5.elfVirustotal: Detection: 22%Perma Link
Source: arm5.elfReversingLabs: Detection: 33%
Source: global trafficTCP traffic: 192.168.2.14:46540 -> 185.125.190.26:443
Source: unknownTCP traffic detected without corresponding DNS query: 185.125.190.26
Source: unknownTCP traffic detected without corresponding DNS query: 185.125.190.26
Source: arm5.elfString found in binary or memory: http://upx.sf.net
Source: unknownNetwork traffic detected: HTTP traffic on port 46540 -> 443
Source: LOAD without section mappingsProgram segment: 0x8000
Source: classification engineClassification label: mal52.evad.linELF@0/0@0/0

Data Obfuscation

barindex
Source: initial sampleString containing UPX found: $Info: This file is packed with the UPX executable packer http://upx.sf.net $
Source: initial sampleString containing UPX found: $Info: This file is packed with the UPX executable packer http://upx.sf.net $
Source: initial sampleString containing UPX found: $Id: UPX 3.94 Copyright (C) 1996-2017 the UPX Team. All Rights Reserved. $
Source: arm5.elfSubmission file: segment LOAD with 7.8821 entropy (max. 8.0)
Source: /tmp/arm5.elf (PID: 5494)Queries kernel information via 'uname': Jump to behavior
Source: arm5.elf, 5494.1.00005635bd6a7000.00005635bd855000.rw-.sdmpBinary or memory string: 5V!/etc/qemu-binfmt/arm
Source: arm5.elf, 5494.1.00005635bd6a7000.00005635bd855000.rw-.sdmpBinary or memory string: /etc/qemu-binfmt/arm
Source: arm5.elf, 5494.1.00007fffdeca1000.00007fffdecc2000.rw-.sdmpBinary or memory string: U~\Hx86_64/usr/bin/qemu-arm/tmp/arm5.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/arm5.elf
Source: arm5.elf, 5494.1.00007fffdeca1000.00007fffdecc2000.rw-.sdmpBinary or memory string: /usr/bin/qemu-arm
ReconnaissanceResource DevelopmentInitial AccessExecutionPersistencePrivilege EscalationDefense EvasionCredential AccessDiscoveryLateral MovementCollectionCommand and ControlExfiltrationImpact
Gather Victim Identity InformationAcquire InfrastructureValid AccountsWindows Management InstrumentationPath InterceptionPath Interception11
Obfuscated Files or Information
OS Credential Dumping11
Security Software Discovery
Remote ServicesData from Local System1
Encrypted Channel
Exfiltration Over Other Network MediumAbuse Accessibility Features
CredentialsDomainsDefault AccountsScheduled Task/JobBoot or Logon Initialization ScriptsBoot or Logon Initialization ScriptsRootkitLSASS MemoryApplication Window DiscoveryRemote Desktop ProtocolData from Removable Media1
Application Layer Protocol
Exfiltration Over BluetoothNetwork Denial of Service
No configs have been found
Hide Legend

Legend:

  • Process
  • Signature
  • Created File
  • DNS/IP Info
  • Is Dropped
  • Number of created Files
  • Is malicious
  • Internet
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 1646133 Sample: arm5.elf Startdate: 23/03/2025 Architecture: LINUX Score: 52 8 185.125.190.26, 443 CANONICAL-ASGB United Kingdom 2->8 10 Multi AV Scanner detection for submitted file 2->10 12 Sample is packed with UPX 2->12 6 arm5.elf 2->6         started        signatures3 process4
SourceDetectionScannerLabelLink
arm5.elf22%VirustotalBrowse
arm5.elf33%ReversingLabsLinux.Backdoor.Mirai
No Antivirus matches
No Antivirus matches
No Antivirus matches

Download Network PCAP: filteredfull

No contacted domains info
NameSourceMaliciousAntivirus DetectionReputation
http://upx.sf.netarm5.elffalse
    high
    • No. of IPs < 25%
    • 25% < No. of IPs < 50%
    • 50% < No. of IPs < 75%
    • 75% < No. of IPs
    IPDomainCountryFlagASNASN NameMalicious
    185.125.190.26
    unknownUnited Kingdom
    41231CANONICAL-ASGBfalse
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                        No context
                        No context
                        No created / dropped files found
                        File type:ELF 32-bit LSB executable, ARM, version 1 (ARM), statically linked, no section header
                        Entropy (8bit):7.878198931664039
                        TrID:
                        • ELF Executable and Linkable format (generic) (4004/1) 100.00%
                        File name:arm5.elf
                        File size:17'624 bytes
                        MD5:5c5594976ba23697c410e1be2b3845d3
                        SHA1:736a24683b40ac15607b4a8808050f8fc426fde7
                        SHA256:10b40ef6ee67fb22cbe03c35b19bf09e2039d4771a95d16d5be2c3fa5447eb13
                        SHA512:8e7f212f2a2cc531ec20a66f98dd92618cd35177c117cd666e6e3b3b8d301cc977545f4a2c51fbdbc283ebf6eb112279f7fe3502f1daf8d63f8353ca75e4113d
                        SSDEEP:384:yPsPjKwuvug0CV9cjN6Nl13hymdGUop5hta:77/gZNl13s3UozW
                        TLSH:1082C070EC95C9A0C771047DE67EC283636F13B9D0BB34A7390447A5E14E85DA0FA4AA
                        File Content Preview:.ELF...a..........(.........4...........4. ...(.....................WC..WC..........................................Q.td..............................CvUPX!....................q..........?.E.h;.}...^......^...e..hM..-..]......u...t.1T`..|.....+...G...o..v

                        ELF header

                        Class:ELF32
                        Data:2's complement, little endian
                        Version:1 (current)
                        Machine:ARM
                        Version Number:0x1
                        Type:EXEC (Executable file)
                        OS/ABI:ARM - ABI
                        ABI Version:0
                        Entry Point Address:0xb1a8
                        Flags:0x2
                        ELF Header Size:52
                        Program Header Offset:52
                        Program Header Size:32
                        Number of Program Headers:3
                        Section Header Offset:0
                        Section Header Size:40
                        Number of Section Headers:0
                        Header String Table Index:0
                        TypeOffsetVirtual AddressPhysical AddressFile SizeMemory SizeEntropyFlagsFlags DescriptionAlignProg InterpreterSection Mappings
                        LOAD0x00x80000x80000x43570x43577.88210x5R E0x8000
                        LOAD0xfac0x18fac0x18fac0x00x00.00000x6RW 0x8000
                        GNU_STACK0x00x00x00x00x00.00000x7RWE0x4

                        Download Network PCAP: filteredfull

                        TimestampSource PortDest PortSource IPDest IP
                        Mar 23, 2025 12:17:21.084810972 CET46540443192.168.2.14185.125.190.26
                        Mar 23, 2025 12:17:52.059626102 CET46540443192.168.2.14185.125.190.26

                        System Behavior

                        Start time (UTC):11:17:11
                        Start date (UTC):23/03/2025
                        Path:/tmp/arm5.elf
                        Arguments:/tmp/arm5.elf
                        File size:4956856 bytes
                        MD5 hash:5ebfcae4fe2471fcc5695c2394773ff1