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Linux Analysis Report
i.elf

Overview

General Information

Sample name:i.elf
Analysis ID:1582370
MD5:07ba7fdb66c5189ea6023acfdca5ea3a
SHA1:9acee8bbfea889c940972e8c914ac04687e6b4d5
SHA256:1272c5bd7379d7c488d6709484f6d8322cfc953862c13c8ffc42e960947856f1
Tags:elfuser-abuse_ch
Infos:

Detection

Score:48
Range:0 - 100
Whitelisted:false

Signatures

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:1582370
Start date and time:2024-12-30 12:18:05 +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:i.elf
Detection:MAL
Classification:mal48.linELF@0/0@0/0
  • VT rate limit hit for: i.elf
Command:/tmp/i.elf
PID:6249
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: 6221, Parent: 4334)
  • rm (PID: 6221, Parent: 4334, MD5: aa2b5496fdbfd88e38791ab81f90b95b) Arguments: rm -f /tmp/tmp.1QCcQkeOJs /tmp/tmp.o2KcotcfP5 /tmp/tmp.ntNcxZnH6R
  • dash New Fork (PID: 6222, Parent: 4334)
  • rm (PID: 6222, Parent: 4334, MD5: aa2b5496fdbfd88e38791ab81f90b95b) Arguments: rm -f /tmp/tmp.1QCcQkeOJs /tmp/tmp.o2KcotcfP5 /tmp/tmp.ntNcxZnH6R
  • i.elf (PID: 6249, Parent: 6150, MD5: 0083f1f0e77be34ad27f849842bbb00c) 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.elfReversingLabs: Detection: 47%
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: 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: 0x100000
Source: classification engineClassification label: mal48.linELF@0/0@0/0
Source: /usr/bin/dash (PID: 6221)Rm executable: /usr/bin/rm -> rm -f /tmp/tmp.1QCcQkeOJs /tmp/tmp.o2KcotcfP5 /tmp/tmp.ntNcxZnH6RJump to behavior
Source: /usr/bin/dash (PID: 6222)Rm executable: /usr/bin/rm -> rm -f /tmp/tmp.1QCcQkeOJs /tmp/tmp.o2KcotcfP5 /tmp/tmp.ntNcxZnH6RJump to behavior
Source: i.elfSubmission file: segment LOAD with 7.9971 entropy (max. 8.0)
Source: /tmp/i.elf (PID: 6249)Queries kernel information via 'uname': Jump to behavior
Source: i.elf, 6249.1.00007ffd6ae69000.00007ffd6ae8a000.rw-.sdmpBinary or memory string: "x86_64/usr/bin/qemu-mips/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, 6249.1.000055bd6bcb4000.000055bd6bd3b000.rw-.sdmpBinary or memory string: U!/etc/qemu-binfmt/mips
Source: i.elf, 6249.1.000055bd6bcb4000.000055bd6bd3b000.rw-.sdmpBinary or memory string: /etc/qemu-binfmt/mips
Source: i.elf, 6249.1.00007ffd6ae69000.00007ffd6ae8a000.rw-.sdmpBinary or memory string: /usr/bin/qemu-mips
Source: i.elf, 6249.1.00007ffd6ae69000.00007ffd6ae8a000.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.elf47%ReversingLabsLinux.Infostealer.Berbew
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 MSB executable, MIPS, MIPS-I version 1 (SYSV), statically linked, no section header
                                                              Entropy (8bit):7.997099644996287
                                                              TrID:
                                                              • ELF Executable and Linkable format (Linux) (4029/14) 50.16%
                                                              • ELF Executable and Linkable format (generic) (4004/1) 49.84%
                                                              File name:i.elf
                                                              File size:76'048 bytes
                                                              MD5:07ba7fdb66c5189ea6023acfdca5ea3a
                                                              SHA1:9acee8bbfea889c940972e8c914ac04687e6b4d5
                                                              SHA256:1272c5bd7379d7c488d6709484f6d8322cfc953862c13c8ffc42e960947856f1
                                                              SHA512:0d2e212e0018abcbfbe65239f4f47955e3c4a7d8f3b44491b84ac8b2db7e35a8e8723e09b9d36f7b6c8973cf170926dd2bd8001421a183a4a5fb52eac4917325
                                                              SSDEEP:1536:yYI0ARqw1qAEW67UIWi7M8gmfmJo0WgswnD6Efyq8PxlRkp2K3/Js:yYI0ARqw1qAEv7UIFM8oJorFquyjkRkc
                                                              TLSH:8373121613A9296252314AF1D7FE7F88E54D2A6C8FF1AC24BC217C68ED3236D2CD5119
                                                              File Content Preview:.ELF....................../....4.........4. ...(......................Bd..Bd.................G...G.................................................^.......?.E.h4...@b..) ..]..0...a.t<..mc.zy/..>..!c...gM\<j..W`xD'..}...\..].j.L.u...S..i...../..F...@`..'k.

                                                              ELF header

                                                              Class:ELF32
                                                              Data:2's complement, big 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:0x112fe8
                                                              Flags:0x1007
                                                              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
                                                              LOAD0x00x1000000x1000000x142640x142647.99710x5R E0x10000
                                                              LOAD0xa6c00x47a6c00x47a6c00x00x00.00000x6RW 0x10000
                                                              TimestampSource PortDest PortSource IPDest IP
                                                              Dec 30, 2024 12:18:49.058178902 CET4433360654.171.230.55192.168.2.23
                                                              Dec 30, 2024 12:18:49.058476925 CET33606443192.168.2.2354.171.230.55
                                                              Dec 30, 2024 12:18:49.063292980 CET4433360654.171.230.55192.168.2.23
                                                              Dec 30, 2024 12:18:52.537156105 CET43928443192.168.2.2391.189.91.42
                                                              Dec 30, 2024 12:18:57.912384987 CET42836443192.168.2.2391.189.91.43
                                                              Dec 30, 2024 12:18:59.192229986 CET4251680192.168.2.23109.202.202.202
                                                              Dec 30, 2024 12:19:13.014398098 CET43928443192.168.2.2391.189.91.42
                                                              Dec 30, 2024 12:19:25.300527096 CET42836443192.168.2.2391.189.91.43
                                                              Dec 30, 2024 12:19:29.395982981 CET4251680192.168.2.23109.202.202.202
                                                              Dec 30, 2024 12:19:53.968502045 CET43928443192.168.2.2391.189.91.42

                                                              System Behavior

                                                              Start time (UTC):11:18:48
                                                              Start date (UTC):30/12/2024
                                                              Path:/usr/bin/dash
                                                              Arguments:-
                                                              File size:129816 bytes
                                                              MD5 hash:1e6b1c887c59a315edb7eb9a315fc84c

                                                              Start time (UTC):11:18:48
                                                              Start date (UTC):30/12/2024
                                                              Path:/usr/bin/rm
                                                              Arguments:rm -f /tmp/tmp.1QCcQkeOJs /tmp/tmp.o2KcotcfP5 /tmp/tmp.ntNcxZnH6R
                                                              File size:72056 bytes
                                                              MD5 hash:aa2b5496fdbfd88e38791ab81f90b95b

                                                              Start time (UTC):11:18:48
                                                              Start date (UTC):30/12/2024
                                                              Path:/usr/bin/dash
                                                              Arguments:-
                                                              File size:129816 bytes
                                                              MD5 hash:1e6b1c887c59a315edb7eb9a315fc84c

                                                              Start time (UTC):11:18:48
                                                              Start date (UTC):30/12/2024
                                                              Path:/usr/bin/rm
                                                              Arguments:rm -f /tmp/tmp.1QCcQkeOJs /tmp/tmp.o2KcotcfP5 /tmp/tmp.ntNcxZnH6R
                                                              File size:72056 bytes
                                                              MD5 hash:aa2b5496fdbfd88e38791ab81f90b95b

                                                              Start time (UTC):11:18:49
                                                              Start date (UTC):30/12/2024
                                                              Path:/tmp/i.elf
                                                              Arguments:/tmp/i.elf
                                                              File size:5777432 bytes
                                                              MD5 hash:0083f1f0e77be34ad27f849842bbb00c