Joe Sandbox Cloud Basic Analysis Report

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Linux Analysis Report
arm7-20240504-1301.elf

Overview

General Information

Sample name:arm7-20240504-1301.elf
Analysis ID:1436349
MD5:6b9ca0dfbb628c3abe4ab3a8eeae0ed0
SHA1:536d3ed814df77a5a88cf3f9f6f3893d932a6744
SHA256:8dcc8bed8d439fc5110a49797089cb45458908794417408b7adf0efef658b26d
Infos:

Detection

Score:56
Range:0 - 100
Whitelisted:false

Signatures

Multi AV Scanner detection for submitted file
Manipulation of devices in /dev
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
Reads system information from the proc file system
Sample contains only a LOAD segment without any section mappings
Sample listens on a socket
Uses the "uname" system call to query kernel version information (possible evasion)

Classification

Analysis Advice

Static ELF header machine description suggests that the sample might not execute correctly on this machine.
Static ELF header machine description suggests that the sample might only run correctly on MIPS or ARM architectures.

General Information

Joe Sandbox version:40.0.0 Tourmaline
Analysis ID:1436349
Start date and time:2024-05-04 15:02:09 +02:00
Joe Sandbox product:CloudBasic
Overall analysis duration:0h 4m 14s
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:arm7-20240504-1301.elf
Detection:MAL
Classification:mal56.evad.linELF@0/0@0/0

Warnings

  • Skipping network analysis since amount of network traffic is too extensive

Runtime Messages

Command:/tmp/arm7-20240504-1301.elf
PID:5427
Exit Code:0
Exit Code Info:
Killed:False
Standard Output:
guess what. you're retarded
Standard Error:

Process Tree

  • system is lnxubuntu20
  • dash New Fork (PID: 5439, Parent: 3580)
  • rm (PID: 5439, Parent: 3580, MD5: aa2b5496fdbfd88e38791ab81f90b95b) Arguments: rm -f /tmp/tmp.eA6gvjMZEk /tmp/tmp.jCBnesXNVP /tmp/tmp.cyr7Wvnjnh
  • dash New Fork (PID: 5440, Parent: 3580)
  • cat (PID: 5440, Parent: 3580, MD5: 7e9d213e404ad3bb82e4ebb2e1f2c1b3) Arguments: cat /tmp/tmp.eA6gvjMZEk
  • dash New Fork (PID: 5441, Parent: 3580)
  • head (PID: 5441, Parent: 3580, MD5: fd96a67145172477dd57131396fc9608) Arguments: head -n 10
  • dash New Fork (PID: 5442, Parent: 3580)
  • tr (PID: 5442, Parent: 3580, MD5: fbd1402dd9f72d8ebfff00ce7c3a7bb5) Arguments: tr -d \\000-\\011\\013\\014\\016-\\037
  • dash New Fork (PID: 5443, Parent: 3580)
  • cut (PID: 5443, Parent: 3580, MD5: d8ed0ea8f22c0de0f8692d4d9f1759d3) Arguments: cut -c -80
  • dash New Fork (PID: 5444, Parent: 3580)
  • cat (PID: 5444, Parent: 3580, MD5: 7e9d213e404ad3bb82e4ebb2e1f2c1b3) Arguments: cat /tmp/tmp.eA6gvjMZEk
  • dash New Fork (PID: 5445, Parent: 3580)
  • head (PID: 5445, Parent: 3580, MD5: fd96a67145172477dd57131396fc9608) Arguments: head -n 10
  • dash New Fork (PID: 5446, Parent: 3580)
  • tr (PID: 5446, Parent: 3580, MD5: fbd1402dd9f72d8ebfff00ce7c3a7bb5) Arguments: tr -d \\000-\\011\\013\\014\\016-\\037
  • dash New Fork (PID: 5447, Parent: 3580)
  • cut (PID: 5447, Parent: 3580, MD5: d8ed0ea8f22c0de0f8692d4d9f1759d3) Arguments: cut -c -80
  • dash New Fork (PID: 5448, Parent: 3580)
  • rm (PID: 5448, Parent: 3580, MD5: aa2b5496fdbfd88e38791ab81f90b95b) Arguments: rm -f /tmp/tmp.eA6gvjMZEk /tmp/tmp.jCBnesXNVP /tmp/tmp.cyr7Wvnjnh
  • cleanup

Yara Signatures

⊘No yara matches

Snort Signatures

⊘No Snort rule has matched

Joe Sandbox Signatures

Click to jump to signature section

Show All Signature Results

AV Detection

barindex
Multi AV Scanner detection for submitted file
Source: arm7-20240504-1301.elfReversingLabs: Detection: 21%
Source: arm7-20240504-1301.elfVirustotal: Detection: 9%Perma Link
Source: /tmp/arm7-20240504-1301.elf (PID: 5427)Socket: 127.0.0.1::46373Jump to behavior
Source: arm7-20240504-1301.elfString found in binary or memory: http://upx.sf.net
Source: LOAD without section mappingsProgram segment: 0x8000
Source: classification engineClassification label: mal56.evad.linELF@0/0@0/0

Data Obfuscation

barindex
Manipulation of devices in /dev
Source: /tmp/arm7-20240504-1301.elf (PID: 5433)Deleted: /dev/nullJump to behavior
Sample is packed with UPX
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: /usr/bin/dash (PID: 5439)Rm executable: /usr/bin/rm -> rm -f /tmp/tmp.eA6gvjMZEk /tmp/tmp.jCBnesXNVP /tmp/tmp.cyr7WvnjnhJump to behavior
Source: /usr/bin/dash (PID: 5448)Rm executable: /usr/bin/rm -> rm -f /tmp/tmp.eA6gvjMZEk /tmp/tmp.jCBnesXNVP /tmp/tmp.cyr7WvnjnhJump to behavior
Source: /tmp/arm7-20240504-1301.elf (PID: 5429)Reads from proc file: /proc/statJump to behavior
Source: arm7-20240504-1301.elfSubmission file: segment LOAD with 7.7346 entropy (max. 8.0)
Source: /tmp/arm7-20240504-1301.elf (PID: 5427)Queries kernel information via 'uname': Jump to behavior
Source: arm7-20240504-1301.elf, 5427.1.00007fffbada5000.00007fffbadc6000.rw-.sdmpBinary or memory string: x86_64/usr/bin/qemu-arm/tmp/arm7-20240504-1301.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/arm7-20240504-1301.elf
Source: arm7-20240504-1301.elf, 5427.1.0000560c46469000.0000560c46679000.rw-.sdmpBinary or memory string: /etc/qemu-binfmt/arm
Source: arm7-20240504-1301.elf, 5427.1.0000560c46469000.0000560c46679000.rw-.sdmpBinary or memory string: V!/etc/qemu-binfmt/arm
Source: arm7-20240504-1301.elf, 5427.1.00007fffbada5000.00007fffbadc6000.rw-.sdmpBinary or memory string: /usr/bin/qemu-arm

Mitre Att&ck Matrix

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 SystemData ObfuscationExfiltration Over Other Network MediumAbuse Accessibility Features
CredentialsDomainsDefault AccountsScheduled Task/JobBoot or Logon Initialization ScriptsBoot or Logon Initialization Scripts1
File Deletion		LSASS Memory1
System Information Discovery		Remote Desktop ProtocolData from Removable MediaJunk DataExfiltration Over BluetoothNetwork Denial of Service

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
behaviorgraph top1 signatures2 2 Behavior Graph ID: 1436349 Sample: arm7-20240504-1301.elf Startdate: 04/05/2024 Architecture: LINUX Score: 56 27 Multi AV Scanner detection for submitted file 2->27 29 Sample is packed with UPX 2->29 8 arm7-20240504-1301.elf 2->8         started        10 dash rm 2->10         started        12 dash cut 2->12         started        14 8 other processes 2->14 process3 process4 16 arm7-20240504-1301.elf 8->16         started        process5 18 arm7-20240504-1301.elf 16->18         started        21 arm7-20240504-1301.elf 16->21         started        23 arm7-20240504-1301.elf 16->23         started        signatures6 31 Manipulation of devices in /dev 18->31 25 arm7-20240504-1301.elf 21->25         started        process7

Antivirus, Machine Learning and Genetic Malware Detection

Initial Sample

SourceDetectionScannerLabelLink
arm7-20240504-1301.elf21%ReversingLabsLinux.Trojan.Multiverze
arm7-20240504-1301.elf9%VirustotalBrowse

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

NameSourceMaliciousAntivirus DetectionReputation
http://upx.sf.netarm7-20240504-1301.elffalse
    		high

    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, ARM, EABI4 version 1 (GNU/Linux), statically linked, no section header
    Entropy (8bit):7.789676236672121
    TrID:
    • ELF Executable and Linkable format (generic) (4004/1) 100.00%
    File name:arm7-20240504-1301.elf
    File size:94'028 bytes
    MD5:6b9ca0dfbb628c3abe4ab3a8eeae0ed0
    SHA1:536d3ed814df77a5a88cf3f9f6f3893d932a6744
    SHA256:8dcc8bed8d439fc5110a49797089cb45458908794417408b7adf0efef658b26d
    SHA512:62459c71f090bfae4ebdd42c11eddc0fedf2584be1e69699c5f6c122654b860ac4cf20d563f8ab78a453640cf1bbae4dc014fb91cf00257462b5a75d90fb8f44
    SSDEEP:1536:z6yNljYpUNGyFhNGNt4Fq959sHVJVVm/YeW/sImHjStE2srPVzeoYYEpSVuCRZwE:O7UN7GNH95aZVEhHmt/w9yoY52r7
    TLSH:529302E42944B11AFE0B0B2EB42FA5808E537AC539FD039EE5E61D651D1781B0F1AF72
    File Content Preview:.ELF..............(......s..4...........4. ...(.........................................LW..L...L...................Q.td.............................D.mUPX!........d4..d4......{.........ELF.d.?..(.~.....4........... ...w.....p.....p..<`.....M.M.g.D......9

    Static ELF Info

    ELF header

    Class:ELF32
    Data:2's complement, little endian
    Version:1 (current)
    Machine:ARM
    Version Number:0x1
    Type:EXEC (Executable file)
    OS/ABI:UNIX - Linux
    ABI Version:0
    Entry Point Address:0x173f8
    Flags:0x4000002
    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

    Program Segments

    TypeOffsetVirtual AddressPhysical AddressFile SizeMemory SizeEntropyFlagsFlags DescriptionAlignProg InterpreterSection Mappings
    LOAD0x00x80000x80000xfd9e0xfd9e7.73460x5R E0x8000
    LOAD0x574c0x3d74c0x3d74c0x00x00.00000x6RW 0x8000
    GNU_STACK0x00x00x00x00x00.00000x7RWE0x4

    Network Behavior

    ⊘Skipped network analysis since the amount of network traffic is too extensive. Please download the PCAP and check manually.

    System Behavior

    General

    Start time (UTC):13:02:46
    Start date (UTC):04/05/2024
    Path:/tmp/arm7-20240504-1301.elf
    Arguments:/tmp/arm7-20240504-1301.elf
    File size:4956856 bytes
    MD5 hash:5ebfcae4fe2471fcc5695c2394773ff1

    Chronological Activities


    General

    Start time (UTC):13:02:46
    Start date (UTC):04/05/2024
    Path:/tmp/arm7-20240504-1301.elf
    Arguments:-
    File size:4956856 bytes
    MD5 hash:5ebfcae4fe2471fcc5695c2394773ff1

    Chronological Activities


    General

    Start time (UTC):13:02:46
    Start date (UTC):04/05/2024
    Path:/tmp/arm7-20240504-1301.elf
    Arguments:-
    File size:4956856 bytes
    MD5 hash:5ebfcae4fe2471fcc5695c2394773ff1

    Chronological Activities


    General

    Start time (UTC):13:02:46
    Start date (UTC):04/05/2024
    Path:/tmp/arm7-20240504-1301.elf
    Arguments:-
    File size:4956856 bytes
    MD5 hash:5ebfcae4fe2471fcc5695c2394773ff1

    Chronological Activities


    General

    Start time (UTC):13:04:29
    Start date (UTC):04/05/2024
    Path:/tmp/arm7-20240504-1301.elf
    Arguments:-
    File size:4956856 bytes
    MD5 hash:5ebfcae4fe2471fcc5695c2394773ff1

    Chronological Activities


    General

    Start time (UTC):13:04:29
    Start date (UTC):04/05/2024
    Path:/tmp/arm7-20240504-1301.elf
    Arguments:-
    File size:4956856 bytes
    MD5 hash:5ebfcae4fe2471fcc5695c2394773ff1

    General

    Start time (UTC):13:02:55
    Start date (UTC):04/05/2024
    Path:/usr/bin/dash
    Arguments:-
    File size:129816 bytes
    MD5 hash:1e6b1c887c59a315edb7eb9a315fc84c

    Chronological Activities


    General

    Start time (UTC):13:02:55
    Start date (UTC):04/05/2024
    Path:/usr/bin/rm
    Arguments:rm -f /tmp/tmp.eA6gvjMZEk /tmp/tmp.jCBnesXNVP /tmp/tmp.cyr7Wvnjnh
    File size:72056 bytes
    MD5 hash:aa2b5496fdbfd88e38791ab81f90b95b

    Chronological Activities


    General

    Start time (UTC):13:02:55
    Start date (UTC):04/05/2024
    Path:/usr/bin/dash
    Arguments:-
    File size:129816 bytes
    MD5 hash:1e6b1c887c59a315edb7eb9a315fc84c

    Chronological Activities


    General

    Start time (UTC):13:02:55
    Start date (UTC):04/05/2024
    Path:/usr/bin/cat
    Arguments:cat /tmp/tmp.eA6gvjMZEk
    File size:43416 bytes
    MD5 hash:7e9d213e404ad3bb82e4ebb2e1f2c1b3

    Chronological Activities


    General

    Start time (UTC):13:02:55
    Start date (UTC):04/05/2024
    Path:/usr/bin/dash
    Arguments:-
    File size:129816 bytes
    MD5 hash:1e6b1c887c59a315edb7eb9a315fc84c

    Chronological Activities


    General

    Start time (UTC):13:02:55
    Start date (UTC):04/05/2024
    Path:/usr/bin/head
    Arguments:head -n 10
    File size:47480 bytes
    MD5 hash:fd96a67145172477dd57131396fc9608

    Chronological Activities


    General

    Start time (UTC):13:02:55
    Start date (UTC):04/05/2024
    Path:/usr/bin/dash
    Arguments:-
    File size:129816 bytes
    MD5 hash:1e6b1c887c59a315edb7eb9a315fc84c

    Chronological Activities


    General

    Start time (UTC):13:02:55
    Start date (UTC):04/05/2024
    Path:/usr/bin/tr
    Arguments:tr -d \\000-\\011\\013\\014\\016-\\037
    File size:51544 bytes
    MD5 hash:fbd1402dd9f72d8ebfff00ce7c3a7bb5

    Chronological Activities


    General

    Start time (UTC):13:02:55
    Start date (UTC):04/05/2024
    Path:/usr/bin/dash
    Arguments:-
    File size:129816 bytes
    MD5 hash:1e6b1c887c59a315edb7eb9a315fc84c

    Chronological Activities


    General

    Start time (UTC):13:02:55
    Start date (UTC):04/05/2024
    Path:/usr/bin/cut
    Arguments:cut -c -80
    File size:47480 bytes
    MD5 hash:d8ed0ea8f22c0de0f8692d4d9f1759d3

    Chronological Activities


    General

    Start time (UTC):13:02:55
    Start date (UTC):04/05/2024
    Path:/usr/bin/dash
    Arguments:-
    File size:129816 bytes
    MD5 hash:1e6b1c887c59a315edb7eb9a315fc84c

    Chronological Activities


    General

    Start time (UTC):13:02:55
    Start date (UTC):04/05/2024
    Path:/usr/bin/cat
    Arguments:cat /tmp/tmp.eA6gvjMZEk
    File size:43416 bytes
    MD5 hash:7e9d213e404ad3bb82e4ebb2e1f2c1b3

    Chronological Activities


    General

    Start time (UTC):13:02:55
    Start date (UTC):04/05/2024
    Path:/usr/bin/dash
    Arguments:-
    File size:129816 bytes
    MD5 hash:1e6b1c887c59a315edb7eb9a315fc84c

    Chronological Activities


    General

    Start time (UTC):13:02:55
    Start date (UTC):04/05/2024
    Path:/usr/bin/head
    Arguments:head -n 10
    File size:47480 bytes
    MD5 hash:fd96a67145172477dd57131396fc9608

    Chronological Activities


    General

    Start time (UTC):13:02:55
    Start date (UTC):04/05/2024
    Path:/usr/bin/dash
    Arguments:-
    File size:129816 bytes
    MD5 hash:1e6b1c887c59a315edb7eb9a315fc84c

    Chronological Activities


    General

    Start time (UTC):13:02:55
    Start date (UTC):04/05/2024
    Path:/usr/bin/tr
    Arguments:tr -d \\000-\\011\\013\\014\\016-\\037
    File size:51544 bytes
    MD5 hash:fbd1402dd9f72d8ebfff00ce7c3a7bb5

    Chronological Activities


    General

    Start time (UTC):13:02:55
    Start date (UTC):04/05/2024
    Path:/usr/bin/dash
    Arguments:-
    File size:129816 bytes
    MD5 hash:1e6b1c887c59a315edb7eb9a315fc84c

    Chronological Activities


    General

    Start time (UTC):13:02:55
    Start date (UTC):04/05/2024
    Path:/usr/bin/cut
    Arguments:cut -c -80
    File size:47480 bytes
    MD5 hash:d8ed0ea8f22c0de0f8692d4d9f1759d3

    Chronological Activities


    General

    Start time (UTC):13:02:55
    Start date (UTC):04/05/2024
    Path:/usr/bin/dash
    Arguments:-
    File size:129816 bytes
    MD5 hash:1e6b1c887c59a315edb7eb9a315fc84c

    Chronological Activities


    General

    Start time (UTC):13:02:55
    Start date (UTC):04/05/2024
    Path:/usr/bin/rm
    Arguments:rm -f /tmp/tmp.eA6gvjMZEk /tmp/tmp.jCBnesXNVP /tmp/tmp.cyr7Wvnjnh
    File size:72056 bytes
    MD5 hash:aa2b5496fdbfd88e38791ab81f90b95b

    Chronological Activities