MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 e8361def9aa8d9f49d44a637431da0237cbdbc0b0993293b22d6c4f8d832a4ef. While MalwareBazaar tries to identify whether the sample provided is malicious or not, there is no guarantee that a sample in MalwareBazaar is malicious.

Database Entry


Kaiji


Vendor detections: 10


Intelligence 10 IOCs YARA 17 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: e8361def9aa8d9f49d44a637431da0237cbdbc0b0993293b22d6c4f8d832a4ef
SHA3-384 hash: b8a9505a7da29031fe4c39287acb00302d2fb5b112ccbb7f24df83c6f378c2d7586c3fbdf8427126888ecd67f3a1e51b
SHA1 hash: b49ca10b115b41f4e7360a57658a05cb5b130e2e
MD5 hash: f648315e395a757a8d0caefb442a3f33
humanhash: diet-muppet-zebra-jersey
File name:linux_arm5
Download: download sample
Signature Kaiji
Create hunting rule
File size:5'308'416 bytes
First seen:2025-02-16 16:07:06 UTC
Last seen:Never
File type: elf
MIME type:application/x-executable
ssdeep 49152:QtKY0CdO+kBRx0Tg0qTecEG7meYuhN+lYfQMcU1F1:OKY3U+qRxQ3qKDM
TLSH T1DB361957B8D28642C0E4367AB8BDC1C433A35EB99B9B62575D04FE3D3ABE1990E35304
telfhash t186c09b674a0c15bd771ed10415065705e5d934f1157566550f28f55b0c10d71368d467
gimphash d32a616709154d99f5f34672a5e693bcff5dc106b2584b8d6f593ff16d689453
TrID 50.1% (.) ELF Executable and Linkable format (Linux) (4022/12)
49.8% (.O) ELF Executable and Linkable format (generic) (4000/1)
Magika elf
Reporter abuse_ch
Tags:elf kaiji

Intelligence

File Origin
# of uploads :
1
# of downloads :
97
Origin country :
DE DE
Vendor Threat Intelligence
Detection(s):
Sanesecurity.Malware.30444.LC.UNOFFICIAL
Create hunting rule

Unix.Trojan.Kaiji-9975495-0
Create hunting rule

Unix.Malware.Kaiji-10002376-0
Create hunting rule

Unix.Malware.Kaiji-10003612-0
Create hunting rule

Unix.Malware.Kaiji-10003670-0
Create hunting rule

Unix.Malware.Kaiji-10025522-0
Create hunting rule

Unix.Malware.Kaiji-10028086-0
Create hunting rule

Unix.Malware.Kaiji-10028719-0
Create hunting rule

Verdict:
Clean
Score:
82.2%
Link:
https://cyber-fortress.com/docs/result/index.php?id=67b20e8ca0fd713c335b393blinux22vpnfull_triage
Tags:
n/a
Result
Verdict:
Malware
Maliciousness:

Behaviour
Manages services
Connection attempt
Creating a file
Mounts file systems
Sets a file as executable
Creates directories in a system directory
Collects information on the RAM
Sets a written file as executable
Locks files
DNS request
Launching a process
Creating a process from a recently created file
Receives data from a server
Sends data to a server
Changes the time when the file was created, accessed, or modified
Writes files to system directory
Writes files to system subdirectory
Replaces system binary files
Creates or modifies files in /cron to set up autorun
Substitutes an application name
Performs a bruteforce attack in the network
Creates or modifies files in /init.d to set up autorun
Creates or modifies files to set up autorun
Verdict:
Unknown
Threat level:
  2.5/10
Confidence:
100%
Tags:
crypto expand golang lolbin obfuscated
Link:
https://www.filescan.io/uploads/67b20d60633d73336288e79e/reports/63fdd260-ae7d-4c9f-bea4-193954ed77e6/overview
Result
Verdict:
MALICIOUS
Verdict:
Unknown
Link:
https://analyze.intezer.com/analyses/25cea428-cc29-4f93-9546-5bde0714590d
Result
Threat name:
Chaos
Create hunting rule
Detection:
malicious
Classification:
spre.troj.evad
Score:
80 / 100
Link:
https://www.joesandbox.com/analysis/1616392
Signature
Drops files in suspicious directories
Multi AV Scanner detection for submitted file
Sample tries to persist itself using /etc/profile
Sample tries to persist itself using cron
Sample tries to set files in /etc globally writable
Uses known network protocols on non-standard ports
Writes identical ELF files to multiple locations
Yara detected Chaos
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 1616392 Sample: linux_arm5.elf Startdate: 16/02/2025 Architecture: LINUX Score: 80 118 199.195.252.200, 45154, 58498, 58502 PONYNETUS United States 2->118 120 www.google.com 2->120 122 Multi AV Scanner detection for submitted file 2->122 124 Yara detected Chaos 2->124 126 Uses known network protocols on non-standard ports 2->126 12 linux_arm5.elf 2->12         started        16 systemd System.img.config 2->16         started        18 sshd sshd 2->18         started        20 5 other processes 2->20 signatures3 process4 file5 114 /etc/id.services.conf, ELF 12->114 dropped 116 /etc/32678, POSIX 12->116 dropped 138 Sample tries to set files in /etc globally writable 12->138 140 Writes identical ELF files to multiple locations 12->140 22 linux_arm5.elf linux_arm5.elf 12->22         started        26 linux_arm5.elf service systemctl 12->26         started        28 linux_arm5.elf bash 12->28         started        30 System.img.config sh 16->30         started        32 System.img.config service systemctl 16->32         started        34 System.img.config pkill 16->34         started        36 System.img.config System.img.config 16->36         started        38 sshd 18->38         started        40 sshd 20->40         started        signatures6 process7 file8 104 /usr/lib/system-monitor, ELF 22->104 dropped 106 /usr/lib/libdlrpcld.so, ELF 22->106 dropped 108 /etc/profile.d/bash_config.sh, a 22->108 dropped 110 4 other files (3 malicious) 22->110 dropped 128 Sample tries to set files in /etc globally writable 22->128 130 Writes identical ELF files to multiple locations 22->130 132 Sample tries to persist itself using /etc/profile 22->132 134 Drops files in suspicious directories 22->134 42 linux_arm5.elf bash 22->42         started        46 linux_arm5.elf bash 22->46         started        56 2 other processes 22->56 48 service 26->48         started        58 3 other processes 26->58 50 bash 32678 28->50         started        52 sh 32678 30->52         started        54 service 32->54         started        60 3 other processes 32->60 signatures9 process10 file11 112 /etc/crontab, ASCII 42->112 dropped 136 Sample tries to persist itself using cron 42->136 74 4 other processes 46->74 62 service systemctl 48->62         started        64 service sed 48->64         started        66 32678 sleep 50->66         started        68 32678 id.services.conf 52->68         started        70 32678 sleep 52->70         started        76 2 other processes 54->76 72 update-rc.d systemctl 56->72         started        78 3 other processes 56->78 signatures12 process13 process14 80 id.services.conf service systemctl 68->80         started        82 id.services.conf sh 68->82         started        84 id.services.conf pkill 68->84         started        86 id.services.conf id.services.conf 68->86         started        process15 88 service 80->88         started        90 service basename 80->90         started        92 service basename 80->92         started        94 service systemctl 80->94         started        96 sh 32678 82->96         started        process16 98 service systemctl 88->98         started        100 service sed 88->100         started        102 32678 sleep 96->102         started       
Score:
100%
Verdict:
Malware
File Type:
ELF
Link:
https://malprob.io/report/e8361def9aa8d9f49d44a637431da0237cbdbc0b0993293b22d6c4f8d832a4ef
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/e8361def9aa8d9f49d44a637431da0237cbdbc0b0993293b22d6c4f8d832a4ef/
Threat name:
Linux.Trojan.Kaiji
Create hunting rule
Status:
Malicious
First seen:
2025-02-16 16:03:14 UTC
File Type:
ELF32 Little (Exe)
AV detection:
19 of 37 (51.35%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=5a3b3342vdm7jhkeuy3ughnaen6l3palbgjssozc23cprwbsutxq._file
Result
Malware family:
kaiji
Create hunting rule
Score:
  10/10
Tags:
family:kaiji defense_evasion discovery execution persistence privilege_escalation
Link:
https://tria.ge/reports/250216-tk67jsskbr/
Behaviour
GoLang User-Agent
Enumerates kernel/hardware configuration
Reads runtime system information
Changes its process name
Reads CPU attributes
Modifies Bash startup script
Creates/modifies Cron job
Creates/modifies environment variables
Enumerates running processes
Modifies init.d
Write file to user bin folder
Executes dropped EXE
Modifies Watchdog functionality
Kaiji
Kaiji family
kaiji_chaosbot
Malware Config
C2 Extraction:
199.195.252.200:808
Verdict:
Malicious
Tags:
trojan kaiji chaos Unix.Trojan.Kaiji-9975495-0
YARA:
ELF_Kaiji_Chaos_April_2024
Link:
https://app.threat.zone/submission/520e2c35-99a0-462f-835f-9e316633c19d
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Kaiji
Score:
0.90
Link:
https://yomi.yoroi.company/submissions/e8361def9aa8d9f49d44a637431da0237cbdbc0b0993293b22d6c4f8d832a4ef

YARA Signatures

MalwareBazaar uses YARA rules from several public and non-public repositories, such as YARAhub and Malpedia. Those are being matched against malware samples uploaded to MalwareBazaar as well as against any suspicious process dumps they may create. Please note that only results from TLP:CLEAR rules are being displayed.

Rule name:DetectGoMethodSignatures
Create hunting rule
Author:Wyatt Tauber
Description:Detects Go method signatures in unpacked Go binaries
Rule name:enterpriseapps2
Create hunting rule
Author:Tim Brown @timb_machine
Description:Enterprise apps
Rule name:enterpriseunix2
Create hunting rule
Author:Tim Brown @timb_machine
Description:Enterprise UNIX
Rule name:F01_s1ckrule
Create hunting rule
Author:s1ckb017
Rule name:GoBinTest
Create hunting rule
Rule name:golang
Create hunting rule
Rule name:golang_binary_string
Create hunting rule
Description:Golang strings present
Rule name:identity_golang
Create hunting rule
Author:Eric Yocam
Description:find Golang malware
Rule name:Linux_Generic_Threat_a40aaa96
Create hunting rule
Author:Elastic Security
Rule name:MD5_Constants
Create hunting rule
Author:phoul (@phoul)
Description:Look for MD5 constants
Rule name:NET
Create hunting rule
Author:malware-lu
Rule name:RANSOMWARE
Create hunting rule
Author:ToroGuitar
Rule name:RIPEMD160_Constants
Create hunting rule
Author:phoul (@phoul)
Description:Look for RIPEMD-160 constants
Rule name:setsockopt
Create hunting rule
Author:Tim Brown @timb_machine
Description:Hunts for setsockopt() red flags
Rule name:SHA1_Constants
Create hunting rule
Author:phoul (@phoul)
Description:Look for SHA1 constants
Rule name:SHA512_Constants
Create hunting rule
Author:phoul (@phoul)
Description:Look for SHA384/SHA512 constants
Rule name:unixredflags3
Create hunting rule
Author:Tim Brown @timb_machine
Description:Hunts for UNIX red flags

File information

The table below shows additional information about this malware sample such as delivery method and external references.

Web download

Kaiji

elf e8361def9aa8d9f49d44a637431da0237cbdbc0b0993293b22d6c4f8d832a4ef

(this sample)

  
URLhaus
https://urlhaus.abuse.ch/url/3441972/
  
Delivery method
Distributed via web download
  
URLhaus
https://urlhaus.abuse.ch/url/3441982/

BLint

The following table provides more information about this file using BLint. BLint is a Binary Linter to check the security properties, and capabilities in executables.

Findings
IDTitleSeverity
CHECK_PIEMissing Position-Independent Executable (PIE) Protectionhigh

Comments