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Linux Analysis Report
harm4.elf

Overview

General Information

Sample name:harm4.elf
Analysis ID:1676028
MD5:b81c2eda5e5d69fe89e4b6c5a329dc36
SHA1:0c57d242553201fb4648b16662297fb41bb6250c
SHA256:8baf184bb874f8ed657d783f24e4532922f8a33e5846ffdc4064bd2cbd53864b
Tags:elfuser-abuse_ch
Infos:

Detection

Score:48
Range:0 - 100

Signatures

Multi AV Scanner detection for submitted file
Executes the "rm" command used to delete files or directories
Sample has stripped symbol table
Uses the "uname" system call to query kernel version information (possible evasion)

Classification

RansomwareSpreadingPhishingBankerTrojan / BotAdwareSpywareExploiterEvaderMinercleansuspiciousmalicious
Joe Sandbox version:42.0.0 Malachite
Analysis ID:1676028
Start date and time:2025-04-28 09:32:13 +02:00
Joe Sandbox product:CloudBasic
Overall analysis duration:0h 4m 38s
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:harm4.elf
Detection:MAL
Classification:mal48.linELF@0/0@0/0
Command:/tmp/harm4.elf
PID:6236
Exit Code:1
Exit Code Info:
Killed:False
Standard Output:

Standard Error:
  • system is lnxubuntu20
  • harm4.elf (PID: 6236, Parent: 6158, MD5: 5ebfcae4fe2471fcc5695c2394773ff1) Arguments: /tmp/harm4.elf
  • dash New Fork (PID: 6297, Parent: 4335)
  • rm (PID: 6297, Parent: 4335, MD5: aa2b5496fdbfd88e38791ab81f90b95b) Arguments: rm -f /tmp/tmp.fzXD24DNWN /tmp/tmp.c2eBUeXStt /tmp/tmp.sN2pjHtcrG
  • dash New Fork (PID: 6298, Parent: 4335)
  • rm (PID: 6298, Parent: 4335, MD5: aa2b5496fdbfd88e38791ab81f90b95b) Arguments: rm -f /tmp/tmp.fzXD24DNWN /tmp/tmp.c2eBUeXStt /tmp/tmp.sN2pjHtcrG
  • cleanup
No yara matches
No Suricata rule has matched

Click to jump to signature section

Show All Signature Results

AV Detection

barindex
Source: harm4.elfReversingLabs: Detection: 22%
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: 34.249.145.219
Source: unknownTCP traffic detected without corresponding DNS query: 34.249.145.219
Source: unknownTCP traffic detected without corresponding DNS query: 34.249.145.219
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: 34.249.145.219
Source: unknownNetwork traffic detected: HTTP traffic on port 39246 -> 443
Source: unknownNetwork traffic detected: HTTP traffic on port 43928 -> 443
Source: unknownNetwork traffic detected: HTTP traffic on port 443 -> 39246
Source: unknownNetwork traffic detected: HTTP traffic on port 42836 -> 443
Source: ELF static info symbol of initial sample.symtab present: no
Source: classification engineClassification label: mal48.linELF@0/0@0/0
Source: /usr/bin/dash (PID: 6297)Rm executable: /usr/bin/rm -> rm -f /tmp/tmp.fzXD24DNWN /tmp/tmp.c2eBUeXStt /tmp/tmp.sN2pjHtcrGJump to behavior
Source: /usr/bin/dash (PID: 6298)Rm executable: /usr/bin/rm -> rm -f /tmp/tmp.fzXD24DNWN /tmp/tmp.c2eBUeXStt /tmp/tmp.sN2pjHtcrGJump to behavior
Source: /tmp/harm4.elf (PID: 6236)Queries kernel information via 'uname': Jump to behavior
Source: harm4.elf, 6236.1.0000555c53542000.0000555c53670000.rw-.sdmpBinary or memory string: US\U!/etc/qemu-binfmt/arm
Source: harm4.elf, 6236.1.0000555c53542000.0000555c53670000.rw-.sdmpBinary or memory string: /etc/qemu-binfmt/arm
Source: harm4.elf, 6236.1.00007ffe43784000.00007ffe437a5000.rw-.sdmpBinary or memory string: /usr/bin/qemu-arm
Source: harm4.elf, 6236.1.00007ffe43784000.00007ffe437a5000.rw-.sdmpBinary or memory string: @|)gx86_64/usr/bin/qemu-arm/tmp/harm4.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/harm4.elf
ReconnaissanceResource DevelopmentInitial AccessExecutionPersistencePrivilege EscalationDefense EvasionCredential AccessDiscoveryLateral MovementCollectionCommand and ControlExfiltrationImpact
Gather Victim Identity InformationAcquire InfrastructureValid AccountsWindows Management InstrumentationPath InterceptionPath Interception1
File Deletion
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: 1676028 Sample: harm4.elf Startdate: 28/04/2025 Architecture: LINUX Score: 48 12 109.202.202.202, 80 INIT7CH Switzerland 2->12 14 91.189.91.42, 443 CANONICAL-ASGB United Kingdom 2->14 16 2 other IPs or domains 2->16 18 Multi AV Scanner detection for submitted file 2->18 6 dash rm 2->6         started        8 dash rm 2->8         started        10 harm4.elf 2->10         started        signatures3 process4
SourceDetectionScannerLabelLink
harm4.elf22%ReversingLabsLinux.Backdoor.Mirai
No Antivirus matches
No Antivirus matches
No Antivirus matches

Download Network PCAP: filteredfull

No contacted domains info
  • No. of IPs < 25%
  • 25% < No. of IPs < 50%
  • 50% < No. of IPs < 75%
  • 75% < No. of IPs
IPDomainCountryFlagASNASN NameMalicious
34.249.145.219
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 created / dropped files found
                                                              File type:ELF 32-bit LSB executable, ARM, version 1 (ARM), statically linked, stripped
                                                              Entropy (8bit):6.060625557455614
                                                              TrID:
                                                              • ELF Executable and Linkable format (generic) (4004/1) 100.00%
                                                              File name:harm4.elf
                                                              File size:72'516 bytes
                                                              MD5:b81c2eda5e5d69fe89e4b6c5a329dc36
                                                              SHA1:0c57d242553201fb4648b16662297fb41bb6250c
                                                              SHA256:8baf184bb874f8ed657d783f24e4532922f8a33e5846ffdc4064bd2cbd53864b
                                                              SHA512:2d1fb0d1cc8b1e9a2ad7331c5fed8457dadf29024579a8eacd450ad618f693915f9ad551228ccd7e1ff19edb9a36858c63271314e8c304ef88638cf0f568d681
                                                              SSDEEP:1536:XyfeqDDGQiMQGl0DHGJ5qlwOrS2dOzyl0m4rtpJevgK:XyfpxiMQGy85qlwb6c+j
                                                              TLSH:C4633A81B8819B13C6D1127BFF5E428D772613A8D2EA7307DE256F21778B81B0E7B245
                                                              File Content Preview:.ELF...a..........(.........4...........4. ...(.....................................................h....S..........Q.td..................................-...L."....?..........0@-.\P...0....S.0...P@...0... ....R......0...0...........0... ....R..... 0....S

                                                              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:0x8190
                                                              Flags:0x202
                                                              ELF Header Size:52
                                                              Program Header Offset:52
                                                              Program Header Size:32
                                                              Number of Program Headers:3
                                                              Section Header Offset:72116
                                                              Section Header Size:40
                                                              Number of Section Headers:10
                                                              Header String Table Index:9
                                                              NameTypeAddressOffsetSizeEntSizeFlagsFlags DescriptionLinkInfoAlign
                                                              NULL0x00x00x00x00x0000
                                                              .initPROGBITS0x80940x940x180x00x6AX004
                                                              .textPROGBITS0x80b00xb00xfe800x00x6AX0016
                                                              .finiPROGBITS0x17f300xff300x140x00x6AX004
                                                              .rodataPROGBITS0x17f440xff440x16c40x00x2A004
                                                              .ctorsPROGBITS0x2160c0x1160c0x80x00x3WA004
                                                              .dtorsPROGBITS0x216140x116140x80x00x3WA004
                                                              .dataPROGBITS0x216200x116200x3540x00x3WA004
                                                              .bssNOBITS0x219740x119740x50680x00x3WA004
                                                              .shstrtabSTRTAB0x00x119740x3e0x00x0001
                                                              TypeOffsetVirtual AddressPhysical AddressFile SizeMemory SizeEntropyFlagsFlags DescriptionAlignProg InterpreterSection Mappings
                                                              LOAD0x00x80000x80000x116080x116086.09230x5R E0x8000.init .text .fini .rodata
                                                              LOAD0x1160c0x2160c0x2160c0x3680x53d02.60960x6RW 0x8000.ctors .dtors .data .bss
                                                              GNU_STACK0x00x00x00x00x00.00000x7RWE0x4

                                                              Download Network PCAP: filteredfull

                                                              • Total Packets: 11
                                                              • 443 (HTTPS)
                                                              • 80 (HTTP)
                                                              TimestampSource PortDest PortSource IPDest IP
                                                              Apr 28, 2025 09:33:02.181915998 CEST43928443192.168.2.2391.189.91.42
                                                              Apr 28, 2025 09:33:07.813112974 CEST42836443192.168.2.2391.189.91.43
                                                              Apr 28, 2025 09:33:09.348881006 CEST4251680192.168.2.23109.202.202.202
                                                              Apr 28, 2025 09:33:21.735097885 CEST39246443192.168.2.2334.249.145.219
                                                              Apr 28, 2025 09:33:21.735116959 CEST4433924634.249.145.219192.168.2.23
                                                              Apr 28, 2025 09:33:21.735244036 CEST39246443192.168.2.2334.249.145.219
                                                              Apr 28, 2025 09:33:21.735877991 CEST39246443192.168.2.2334.249.145.219
                                                              Apr 28, 2025 09:33:21.735888958 CEST4433924634.249.145.219192.168.2.23
                                                              Apr 28, 2025 09:33:22.659018993 CEST43928443192.168.2.2391.189.91.42
                                                              Apr 28, 2025 09:33:34.945410967 CEST42836443192.168.2.2391.189.91.43
                                                              Apr 28, 2025 09:33:39.040925980 CEST4251680192.168.2.23109.202.202.202
                                                              Apr 28, 2025 09:34:03.613454103 CEST43928443192.168.2.2391.189.91.42
                                                              Apr 28, 2025 09:34:21.727494955 CEST39246443192.168.2.2334.249.145.219
                                                              Apr 28, 2025 09:34:21.768276930 CEST4433924634.249.145.219192.168.2.23
                                                              Apr 28, 2025 09:35:07.936666965 CEST4433924634.249.145.219192.168.2.23

                                                              System Behavior

                                                              Start time (UTC):07:33:04
                                                              Start date (UTC):28/04/2025
                                                              Path:/tmp/harm4.elf
                                                              Arguments:/tmp/harm4.elf
                                                              File size:4956856 bytes
                                                              MD5 hash:5ebfcae4fe2471fcc5695c2394773ff1

                                                              Start time (UTC):07:34:21
                                                              Start date (UTC):28/04/2025
                                                              Path:/usr/bin/dash
                                                              Arguments:-
                                                              File size:129816 bytes
                                                              MD5 hash:1e6b1c887c59a315edb7eb9a315fc84c

                                                              Start time (UTC):07:34:21
                                                              Start date (UTC):28/04/2025
                                                              Path:/usr/bin/rm
                                                              Arguments:rm -f /tmp/tmp.fzXD24DNWN /tmp/tmp.c2eBUeXStt /tmp/tmp.sN2pjHtcrG
                                                              File size:72056 bytes
                                                              MD5 hash:aa2b5496fdbfd88e38791ab81f90b95b

                                                              Start time (UTC):07:34:21
                                                              Start date (UTC):28/04/2025
                                                              Path:/usr/bin/dash
                                                              Arguments:-
                                                              File size:129816 bytes
                                                              MD5 hash:1e6b1c887c59a315edb7eb9a315fc84c

                                                              Start time (UTC):07:34:21
                                                              Start date (UTC):28/04/2025
                                                              Path:/usr/bin/rm
                                                              Arguments:rm -f /tmp/tmp.fzXD24DNWN /tmp/tmp.c2eBUeXStt /tmp/tmp.sN2pjHtcrG
                                                              File size:72056 bytes
                                                              MD5 hash:aa2b5496fdbfd88e38791ab81f90b95b