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Linux Analysis Report
db0fa4b8db0333367e9bda3ab68b8042.arm5.elf

Overview

General Information

Sample name:db0fa4b8db0333367e9bda3ab68b8042.arm5.elf
Analysis ID:1581148
MD5:8674a79bbe4a5498451670e72be0ec71
SHA1:d6c36545b974af0d62631a3dfeeefa08f1a6992a
SHA256:d1d6f252b6557525e0a7c15ae94a239a2fb977d5f8f7bc12c49ba93996187b3e
Tags:elfuser-abuse_ch
Infos:

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
Executes the "rm" command used to delete files or directories
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

Joe Sandbox version:41.0.0 Charoite
Analysis ID:1581148
Start date and time:2024-12-27 06:12:04 +01:00
Joe Sandbox product:CloudBasic
Overall analysis duration:0h 4m 22s
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:db0fa4b8db0333367e9bda3ab68b8042.arm5.elf
Detection:MAL
Classification:mal52.evad.linELF@0/0@0/0
Command:/tmp/db0fa4b8db0333367e9bda3ab68b8042.arm5.elf
PID:6235
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
  • system is lnxubuntu20
  • dash New Fork (PID: 6203, Parent: 4331)
  • rm (PID: 6203, Parent: 4331, MD5: aa2b5496fdbfd88e38791ab81f90b95b) Arguments: rm -f /tmp/tmp.06kCCNG3ZT /tmp/tmp.KTKEU8jCJT /tmp/tmp.9NfpWah19d
  • dash New Fork (PID: 6204, Parent: 4331)
  • rm (PID: 6204, Parent: 4331, MD5: aa2b5496fdbfd88e38791ab81f90b95b) Arguments: rm -f /tmp/tmp.06kCCNG3ZT /tmp/tmp.KTKEU8jCJT /tmp/tmp.9NfpWah19d
  • cleanup
No yara matches
No Suricata rule has matched

Click to jump to signature section

Show All Signature Results

AV Detection

barindex
Source: db0fa4b8db0333367e9bda3ab68b8042.arm5.elfVirustotal: Detection: 41%Perma Link
Source: db0fa4b8db0333367e9bda3ab68b8042.arm5.elfReversingLabs: Detection: 39%
Source: global trafficTCP traffic: 192.168.2.23:43928 -> 91.189.91.42:443
Source: global trafficTCP traffic: 192.168.2.23:42836 -> 91.189.91.43:443
Source: global trafficTCP traffic: 192.168.2.23:42516 -> 109.202.202.202:80
Source: unknownTCP traffic detected without corresponding DNS query: 91.189.91.42
Source: unknownTCP traffic detected without corresponding DNS query: 91.189.91.43
Source: unknownTCP traffic detected without corresponding DNS query: 109.202.202.202
Source: unknownTCP traffic detected without corresponding DNS query: 91.189.91.42
Source: unknownTCP traffic detected without corresponding DNS query: 91.189.91.43
Source: unknownTCP traffic detected without corresponding DNS query: 109.202.202.202
Source: unknownTCP traffic detected without corresponding DNS query: 91.189.91.42
Source: db0fa4b8db0333367e9bda3ab68b8042.arm5.elfString found in binary or memory: http://upx.sf.net
Source: unknownNetwork traffic detected: HTTP traffic on port 43928 -> 443
Source: unknownNetwork traffic detected: HTTP traffic on port 42836 -> 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 3.95 Copyright (C) 1996-2018 the UPX Team. All Rights Reserved. $
Source: /usr/bin/dash (PID: 6203)Rm executable: /usr/bin/rm -> rm -f /tmp/tmp.06kCCNG3ZT /tmp/tmp.KTKEU8jCJT /tmp/tmp.9NfpWah19dJump to behavior
Source: /usr/bin/dash (PID: 6204)Rm executable: /usr/bin/rm -> rm -f /tmp/tmp.06kCCNG3ZT /tmp/tmp.KTKEU8jCJT /tmp/tmp.9NfpWah19dJump to behavior
Source: db0fa4b8db0333367e9bda3ab68b8042.arm5.elfSubmission file: segment LOAD with 7.9501 entropy (max. 8.0)
Source: /tmp/db0fa4b8db0333367e9bda3ab68b8042.arm5.elf (PID: 6235)Queries kernel information via 'uname': Jump to behavior
Source: db0fa4b8db0333367e9bda3ab68b8042.arm5.elf, 6235.1.00007ffe27443000.00007ffe27464000.rw-.sdmpBinary or memory string: x86_64/usr/bin/qemu-arm/tmp/db0fa4b8db0333367e9bda3ab68b8042.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/db0fa4b8db0333367e9bda3ab68b8042.arm5.elf
Source: db0fa4b8db0333367e9bda3ab68b8042.arm5.elf, 6235.1.000056418d681000.000056418d7af000.rw-.sdmpBinary or memory string: AV!/etc/qemu-binfmt/arm
Source: db0fa4b8db0333367e9bda3ab68b8042.arm5.elf, 6235.1.000056418d681000.000056418d7af000.rw-.sdmpBinary or memory string: /etc/qemu-binfmt/arm
Source: db0fa4b8db0333367e9bda3ab68b8042.arm5.elf, 6235.1.00007ffe27443000.00007ffe27464000.rw-.sdmpBinary or memory string: /usr/bin/qemu-arm
Source: db0fa4b8db0333367e9bda3ab68b8042.arm5.elf, 6235.1.00007ffe27443000.00007ffe27464000.rw-.sdmpBinary or memory string: qemu: uncaught target signal 11 (Segmentation fault) - core dumped
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 Scripts1
File Deletion
LSASS 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

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


windows-stand
SourceDetectionScannerLabelLink
db0fa4b8db0333367e9bda3ab68b8042.arm5.elf41%VirustotalBrowse
db0fa4b8db0333367e9bda3ab68b8042.arm5.elf39%ReversingLabsLinux.Trojan.Mirai
No Antivirus matches
No Antivirus matches
No Antivirus matches
No contacted domains info
NameSourceMaliciousAntivirus DetectionReputation
http://upx.sf.netdb0fa4b8db0333367e9bda3ab68b8042.arm5.elffalse
    high
    • No. of IPs < 25%
    • 25% < No. of IPs < 50%
    • 50% < No. of IPs < 75%
    • 75% < No. of IPs
    IPDomainCountryFlagASNASN NameMalicious
    109.202.202.202
    unknownSwitzerland
    13030INIT7CHfalse
    91.189.91.43
    unknownUnited Kingdom
    41231CANONICAL-ASGBfalse
    91.189.91.42
    unknownUnited Kingdom
    41231CANONICAL-ASGBfalse
    MatchAssociated Sample Name / URLSHA 256DetectionThreat NameLinkContext
    109.202.202.202kpLwzBouH4.elfGet hashmaliciousUnknownBrowse
    • ch.archive.ubuntu.com/ubuntu/pool/main/f/firefox/firefox_92.0%2bbuild3-0ubuntu0.20.04.1_amd64.deb
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                                            CANONICAL-ASGBdb0fa4b8db0333367e9bda3ab68b8042.ppc.elfGet hashmaliciousUnknownBrowse
                                            • 91.189.91.42
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                                            • 91.189.91.42
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                                            • 91.189.91.42
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                                            • 91.189.91.42
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                                            • 91.189.91.42
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                                            • 109.202.202.202
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                                            • 109.202.202.202
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                                            • 109.202.202.202
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                                            • 109.202.202.202
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                                            • 109.202.202.202
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                                            • 109.202.202.202
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                                            • 109.202.202.202
                                            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):7.947862364226688
                                            TrID:
                                            • ELF Executable and Linkable format (generic) (4004/1) 100.00%
                                            File name:db0fa4b8db0333367e9bda3ab68b8042.arm5.elf
                                            File size:31'268 bytes
                                            MD5:8674a79bbe4a5498451670e72be0ec71
                                            SHA1:d6c36545b974af0d62631a3dfeeefa08f1a6992a
                                            SHA256:d1d6f252b6557525e0a7c15ae94a239a2fb977d5f8f7bc12c49ba93996187b3e
                                            SHA512:1e7a71e6729d9a8186ec206cc4000a175f343ff21fa0b768f989caa29127e90d8723d964809fa46576f886a3bec634bcd78e120a53d7d6b4e1b486ab5939d5b8
                                            SSDEEP:768:XwtjJ4mQr5XGZmfXeQkvHp9wDPzd5jZ3Mfy3Uod:X42mQxGZwkvnwv2y
                                            TLSH:84E2E161C90A58F2C2E5CEF3F74FA681FB62277DAC586123348012DC454B1E69B7F196
                                            File Content Preview:.ELF...a..........(.........4...........4. ...(......................x...x...............................(..........Q.td............................K..gUPX!.........'...'......t..........?.E.h;.}...^........m....,.e..\.t..[........T...8V.....W...V.....J..

                                            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:0xe6ec
                                            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
                                            LOAD0x00x80000x80000x78b40x78b47.95010x5R E0x8000
                                            LOAD0x00x100000x100000x00x128080.00000x6RW 0x8000
                                            GNU_STACK0x00x00x00x00x00.00000x7RWE0x4
                                            TimestampSource PortDest PortSource IPDest IP
                                            Dec 27, 2024 06:12:44.268273115 CET43928443192.168.2.2391.189.91.42
                                            Dec 27, 2024 06:12:49.899400949 CET42836443192.168.2.2391.189.91.43
                                            Dec 27, 2024 06:12:51.435133934 CET4251680192.168.2.23109.202.202.202
                                            Dec 27, 2024 06:13:05.769293070 CET43928443192.168.2.2391.189.91.42
                                            Dec 27, 2024 06:13:16.008012056 CET42836443192.168.2.2391.189.91.43
                                            Dec 27, 2024 06:13:22.151129007 CET4251680192.168.2.23109.202.202.202
                                            Dec 27, 2024 06:13:46.723805904 CET43928443192.168.2.2391.189.91.42

                                            System Behavior

                                            Start time (UTC):05:12:37
                                            Start date (UTC):27/12/2024
                                            Path:/usr/bin/dash
                                            Arguments:-
                                            File size:129816 bytes
                                            MD5 hash:1e6b1c887c59a315edb7eb9a315fc84c

                                            Start time (UTC):05:12:37
                                            Start date (UTC):27/12/2024
                                            Path:/usr/bin/rm
                                            Arguments:rm -f /tmp/tmp.06kCCNG3ZT /tmp/tmp.KTKEU8jCJT /tmp/tmp.9NfpWah19d
                                            File size:72056 bytes
                                            MD5 hash:aa2b5496fdbfd88e38791ab81f90b95b

                                            Start time (UTC):05:12:37
                                            Start date (UTC):27/12/2024
                                            Path:/usr/bin/dash
                                            Arguments:-
                                            File size:129816 bytes
                                            MD5 hash:1e6b1c887c59a315edb7eb9a315fc84c

                                            Start time (UTC):05:12:37
                                            Start date (UTC):27/12/2024
                                            Path:/usr/bin/rm
                                            Arguments:rm -f /tmp/tmp.06kCCNG3ZT /tmp/tmp.KTKEU8jCJT /tmp/tmp.9NfpWah19d
                                            File size:72056 bytes
                                            MD5 hash:aa2b5496fdbfd88e38791ab81f90b95b

                                            Start time (UTC):05:12:41
                                            Start date (UTC):27/12/2024
                                            Path:/tmp/db0fa4b8db0333367e9bda3ab68b8042.arm5.elf
                                            Arguments:/tmp/db0fa4b8db0333367e9bda3ab68b8042.arm5.elf
                                            File size:4956856 bytes
                                            MD5 hash:5ebfcae4fe2471fcc5695c2394773ff1