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Linux Analysis Report
.i.elf

Overview

General Information

Sample name:.i.elf
Analysis ID:1581091
MD5:09666a4e5fd9801fa89931bbed0e2bd6
SHA1:1be8a7d3e929dee7a0ee88508da76a97ad5ddf23
SHA256:b8757754e5749dcde15faf47a3bcfbb270eb7f93554f976de5f512abec9ad282
Tags:elfuser-abuse_ch
Infos:

Detection

Score:56
Range:0 - 100
Whitelisted:false

Signatures

Antivirus / Scanner detection for submitted sample
Multi AV Scanner detection for submitted file
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
Uses the "uname" system call to query kernel version information (possible evasion)

Classification

Joe Sandbox version:41.0.0 Charoite
Analysis ID:1581091
Start date and time:2024-12-26 23:12:04 +01:00
Joe Sandbox product:CloudBasic
Overall analysis duration:0h 4m 34s
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:.i.elf
Detection:MAL
Classification:mal56.linELF@0/0@0/0
  • VT rate limit hit for: .i.elf
Command:/tmp/.i.elf
PID:6258
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: 6232, Parent: 4334)
  • rm (PID: 6232, Parent: 4334, MD5: aa2b5496fdbfd88e38791ab81f90b95b) Arguments: rm -f /tmp/tmp.fnbuf9v4EX /tmp/tmp.4RY607dMWP /tmp/tmp.7H1gR4pwJs
  • dash New Fork (PID: 6233, Parent: 4334)
  • rm (PID: 6233, Parent: 4334, MD5: aa2b5496fdbfd88e38791ab81f90b95b) Arguments: rm -f /tmp/tmp.fnbuf9v4EX /tmp/tmp.4RY607dMWP /tmp/tmp.7H1gR4pwJs
  • .i.elf (PID: 6258, Parent: 6159, MD5: 5ebfcae4fe2471fcc5695c2394773ff1) Arguments: /tmp/.i.elf
  • cleanup
No yara matches
No Suricata rule has matched

Click to jump to signature section

Show All Signature Results

AV Detection

barindex
Source: .i.elfAvira: detected
Source: .i.elfReversingLabs: Detection: 60%
Source: unknownTCP traffic detected without corresponding DNS query: 54.171.230.55
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: unknownTCP traffic detected without corresponding DNS query: 91.189.91.43
Source: unknownNetwork traffic detected: HTTP traffic on port 443 -> 33606
Source: unknownNetwork traffic detected: HTTP traffic on port 33606 -> 443
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: 0x10000
Source: classification engineClassification label: mal56.linELF@0/0@0/0
Source: /usr/bin/dash (PID: 6232)Rm executable: /usr/bin/rm -> rm -f /tmp/tmp.fnbuf9v4EX /tmp/tmp.4RY607dMWP /tmp/tmp.7H1gR4pwJsJump to behavior
Source: /usr/bin/dash (PID: 6233)Rm executable: /usr/bin/rm -> rm -f /tmp/tmp.fnbuf9v4EX /tmp/tmp.4RY607dMWP /tmp/tmp.7H1gR4pwJsJump to behavior
Source: .i.elfSubmission file: segment LOAD with 7.9955 entropy (max. 8.0)
Source: /tmp/.i.elf (PID: 6258)Queries kernel information via 'uname': Jump to behavior
Source: .i.elf, 6258.1.00007fff2849c000.00007fff284bd000.rw-.sdmpBinary or memory string: x86_64/usr/bin/qemu-arm/tmp/.i.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/.i.elf
Source: .i.elf, 6258.1.0000560b0d646000.0000560b0d774000.rw-.sdmpBinary or memory string: /etc/qemu-binfmt/arm
Source: .i.elf, 6258.1.0000560b0d646000.0000560b0d774000.rw-.sdmpBinary or memory string: V!/etc/qemu-binfmt/arm
Source: .i.elf, 6258.1.00007fff2849c000.00007fff284bd000.rw-.sdmpBinary or memory string: /usr/bin/qemu-arm
Source: .i.elf, 6258.1.00007fff2849c000.00007fff284bd000.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 Interception1
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
SourceDetectionScannerLabelLink
.i.elf61%ReversingLabsLinux.Backdoor.Mirai
.i.elf100%AviraBDS/Berbew.zaxan
No Antivirus matches
No Antivirus matches
No Antivirus matches
No contacted domains info
  • No. of IPs < 25%
  • 25% < No. of IPs < 50%
  • 50% < No. of IPs < 75%
  • 75% < No. of IPs
IPDomainCountryFlagASNASN NameMalicious
54.171.230.55
unknownUnited States
16509AMAZON-02USfalse
109.202.202.202
unknownSwitzerland
13030INIT7CHfalse
91.189.91.43
unknownUnited Kingdom
41231CANONICAL-ASGBfalse
91.189.91.42
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, EABI5 version 1 (GNU/Linux), statically linked, no section header
                                                              Entropy (8bit):7.995486854520616
                                                              TrID:
                                                              • ELF Executable and Linkable format (generic) (4004/1) 100.00%
                                                              File name:.i.elf
                                                              File size:50'112 bytes
                                                              MD5:09666a4e5fd9801fa89931bbed0e2bd6
                                                              SHA1:1be8a7d3e929dee7a0ee88508da76a97ad5ddf23
                                                              SHA256:b8757754e5749dcde15faf47a3bcfbb270eb7f93554f976de5f512abec9ad282
                                                              SHA512:a175b269ac4d18f58de8583bb8494df78c464093282890154b6139e1157a92d37a4fefe393c2a7d445fb86b44fe6072fa38ea6736e141090172107cec9ce5bed
                                                              SSDEEP:1536:87vbq1lGAXSEYQjbChaAU2yU23M51DjZA:8D+CAXFYQChaAUk5ljC
                                                              TLSH:B82302D00772278C83A5DE793CAE301E8424255B72EA2D102D97918FF54B712AC76EFD
                                                              File Content Preview:.ELF..............(......'..4...........4. ...(......................7...7.............................................c........................i..........?.E.h;....#..$..O.%.......y.A.U"......-R..e....<l>=).!...O........u.....`o..*ziy"......R..~@....x2'_

                                                              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:0x22718
                                                              Flags:0x5000202
                                                              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
                                                              TypeOffsetVirtual AddressPhysical AddressFile SizeMemory SizeEntropyFlagsFlags DescriptionAlignProg InterpreterSection Mappings
                                                              LOAD0x00x100000x100000x137e90x137e97.99550x5R E0x10000
                                                              LOAD0x6fc0x506fc0x506fc0x00x00.00000x6RW 0x10000
                                                              TimestampSource PortDest PortSource IPDest IP
                                                              Dec 26, 2024 23:12:48.205692053 CET4433360654.171.230.55192.168.2.23
                                                              Dec 26, 2024 23:12:48.205903053 CET33606443192.168.2.2354.171.230.55
                                                              Dec 26, 2024 23:12:48.325792074 CET4433360654.171.230.55192.168.2.23
                                                              Dec 26, 2024 23:12:50.727977037 CET43928443192.168.2.2391.189.91.42
                                                              Dec 26, 2024 23:12:56.103224993 CET42836443192.168.2.2391.189.91.43
                                                              Dec 26, 2024 23:12:57.383183956 CET4251680192.168.2.23109.202.202.202
                                                              Dec 26, 2024 23:13:11.717204094 CET43928443192.168.2.2391.189.91.42
                                                              Dec 26, 2024 23:13:21.955692053 CET42836443192.168.2.2391.189.91.43
                                                              Dec 26, 2024 23:13:28.098887920 CET4251680192.168.2.23109.202.202.202
                                                              Dec 26, 2024 23:13:52.671638966 CET43928443192.168.2.2391.189.91.42
                                                              Dec 26, 2024 23:14:13.148691893 CET42836443192.168.2.2391.189.91.43

                                                              System Behavior

                                                              Start time (UTC):22:12:47
                                                              Start date (UTC):26/12/2024
                                                              Path:/usr/bin/dash
                                                              Arguments:-
                                                              File size:129816 bytes
                                                              MD5 hash:1e6b1c887c59a315edb7eb9a315fc84c

                                                              Start time (UTC):22:12:47
                                                              Start date (UTC):26/12/2024
                                                              Path:/usr/bin/rm
                                                              Arguments:rm -f /tmp/tmp.fnbuf9v4EX /tmp/tmp.4RY607dMWP /tmp/tmp.7H1gR4pwJs
                                                              File size:72056 bytes
                                                              MD5 hash:aa2b5496fdbfd88e38791ab81f90b95b

                                                              Start time (UTC):22:12:47
                                                              Start date (UTC):26/12/2024
                                                              Path:/usr/bin/dash
                                                              Arguments:-
                                                              File size:129816 bytes
                                                              MD5 hash:1e6b1c887c59a315edb7eb9a315fc84c

                                                              Start time (UTC):22:12:47
                                                              Start date (UTC):26/12/2024
                                                              Path:/usr/bin/rm
                                                              Arguments:rm -f /tmp/tmp.fnbuf9v4EX /tmp/tmp.4RY607dMWP /tmp/tmp.7H1gR4pwJs
                                                              File size:72056 bytes
                                                              MD5 hash:aa2b5496fdbfd88e38791ab81f90b95b

                                                              Start time (UTC):22:12:49
                                                              Start date (UTC):26/12/2024
                                                              Path:/tmp/.i.elf
                                                              Arguments:/tmp/.i.elf
                                                              File size:4956856 bytes
                                                              MD5 hash:5ebfcae4fe2471fcc5695c2394773ff1