MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 0ca9194de2c6c8f8ceea61961a0be141fe82ba5d43a3cfc253af8e25f912a991. 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 21 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 0ca9194de2c6c8f8ceea61961a0be141fe82ba5d43a3cfc253af8e25f912a991
SHA3-384 hash: b3f0d8c1b51b2001eefda046e4078b28d2c0696dc956d01ba1d85ae1d5f1751e5f00a59e600ba1653ae02a4999802445
SHA1 hash: 7bc6c704236dec4accd0ed4551046d96779e4179
MD5 hash: 9ac10c54aff5df7469ac558e7e4351da
humanhash: uncle-illinois-lamp-mars
File name:linux_arm5
Download: download sample
Signature Kaiji
Create hunting rule
File size:5'308'416 bytes
First seen:2025-07-11 06:35:46 UTC
Last seen:2025-10-29 15:13:56 UTC
File type: elf
MIME type:application/x-executable
ssdeep 49152:QtKY0CdO+kBRx0Tg0qTecEG7meYuh9+lYfQMcU1F1:OKY3U+qRxQ3qKfM
TLSH T130361957B8D28642C0E4367AB8BDC1C433A35EB99B9B62575D04FE3D3ABE1990E35304
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
File size (compressed) :1'490'384 bytes
File size (de-compressed) :5'308'416 bytes
Format:linux/arm
Packed file: 75dc3ac515dd1cd087309fa4d6a314fabd38a10b43a1863a86534f74a4dc0bfb

Intelligence

File Origin
# of uploads :
3
# of downloads :
16
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=6870b0ed900df8e7f869b6b8linux22vpnfull_triage
Tags:
n/a
Result
Verdict:
Malware
Maliciousness:

Behaviour
Changes the time when the file was created, accessed, or modified
Sets a file as executable
Collects information on the RAM
Sends data to a server
Receives data from a server
Connection attempt
DNS request
Creating a file
Sets a written file as executable
Creates directories in a system directory
Launching a process
Locks files
Mounts file systems
Manages services
Creating a process from a recently created file
Substitutes an application name
Replaces system binary files
Writes files to system subdirectory
Writes files to system directory
Creates or modifies files in /cron to set up autorun
Creates or modifies files in /init.d to set up autorun
Creates or modifies files to set up autorun
Performs a bruteforce attack in the network
Verdict:
Likely Malicious
Threat level:
  7.5/10
Confidence:
100%
Tags:
expand golang lolbin obfuscated
Link:
https://www.filescan.io/uploads/6870b0e22f482f87cbf7c317/reports/c69609c9-3426-4283-be21-c9743f835d13/overview
Verdict:
Malicious
Uses P2P?:
false
Uses anti-vm?:
true
Architecture:
arm
Packer:
not packed
Botnet:
unknown
Number of open files:
239
Number of processes launched:
39
Processes remaning?
true
Remote TCP ports scanned:
not identified
Full report:
https://elfdigest.com/brief/0ca9194de2c6c8f8ceea61961a0be141fe82ba5d43a3cfc253af8e25f912a991
Behaviour
Anti-VM
Persistence
Process Renaming
Information Gathering
Botnet C2s
TCP botnet C2(s):
not identified
UDP botnet C2(s):
not identified
Status:
terminated
Link:
https://sandbox.kunai.rocks/analysis/7f292c8c-fa7e-47ba-aa28-7437f00857e4
Behavior Graph:
Download SVG
%3 guuid=06d634cd-1800-0000-d4e7-3119560b0000 pid=2902 /usr/bin/sudo guuid=e4d18ccf-1800-0000-d4e7-31195d0b0000 pid=2909 /tmp/sample.bin guuid=06d634cd-1800-0000-d4e7-3119560b0000 pid=2902->guuid=e4d18ccf-1800-0000-d4e7-31195d0b0000 pid=2909 execve
Verdict:
Unknown
Link:
https://analyze.intezer.com/analyses/6e3f951d-d5fc-4a23-b1b3-f960186bb237
Result
Threat name:
Chaos
Create hunting rule
Detection:
malicious
Classification:
spre.troj.evad
Score:
80 / 100
Link:
https://www.joesandbox.com/analysis/1733399
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: 1733399 Sample: linux_arm5.elf Startdate: 11/07/2025 Architecture: LINUX Score: 80 118 154.201.82.47, 34682, 34686, 54342 PEGTECHINCUS Seychelles 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 8 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 bash 12->26         started        28 linux_arm5.elf service systemctl 12->28         started        30 System.img.config service systemctl 16->30         started        32 System.img.config sh 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 3 other processes 20->40 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 bash 32678 26->48         started        50 service 28->50         started        58 3 other processes 28->58 52 service 30->52         started        60 3 other processes 30->60 54 sh 32678 32->54         started        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 32678 id.services.conf 48->62         started        64 32678 sleep 48->64         started        66 service systemctl 50->66         started        68 service sed 50->68         started        76 2 other processes 52->76 70 32678 sleep 54->70         started        72 update-rc.d systemctl 56->72         started        78 3 other processes 56->78 signatures12 process13 process14 80 id.services.conf service systemctl 62->80         started        82 id.services.conf bash 62->82         started        84 id.services.conf pkill 62->84         started        86 id.services.conf id.services.conf 62->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 bash 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/0ca9194de2c6c8f8ceea61961a0be141fe82ba5d43a3cfc253af8e25f912a991
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/0ca9194de2c6c8f8ceea61961a0be141fe82ba5d43a3cfc253af8e25f912a991/
Threat name:
Linux.Trojan.Kaiji
Create hunting rule
Status:
Malicious
First seen:
2025-07-11 06:36:15 UTC
File Type:
ELF32 Little (Exe)
AV detection:
24 of 38 (63.16%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=bsurstpcy3eprtxkmglbuc7bih7ifos5ior47qstv6hcl6isvgiq._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/250711-hcz8gssvcw/
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:
154.201.82.47:808
Verdict:
Malicious
Tags:
trojan chaos kaiji Unix.Trojan.Kaiji-9975495-0
YARA:
ELF_Kaiji_Chaos_April_2024
Link:
https://app.threat.zone/submission/ffaf8bfc-260e-428a-bba4-dac41797b4c2
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Suspicious File
Score:
0.30
Link:
https://yomi.yoroi.company/submissions/0ca9194de2c6c8f8ceea61961a0be141fe82ba5d43a3cfc253af8e25f912a991

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:botnet_plaintext_c2
Create hunting rule
Author:cip
Description:Attempts to match at least some of the strings used in some botnet variants which use plaintext communication protocols.
Rule name:DetectEncryptedVariants
Create hunting rule
Author:Zinyth
Description:Detects 'encrypted' in ASCII, Unicode, base64, or hex-encoded
Rule name:DetectGoMethodSignatures
Create hunting rule
Author:Wyatt Tauber
Description:Detects Go method signatures in unpacked Go binaries
Rule name:Detect_Go_GOMAXPROCS
Create hunting rule
Author:Obscurity Labs LLC
Description:Detects Go binaries by the presence of runtime.GOMAXPROCS in the runtime metadata
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:ProgramLanguage_Golang
Create hunting rule
Author:albertzsigovits
Description:Application written in Golang programming language
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 0ca9194de2c6c8f8ceea61961a0be141fe82ba5d43a3cfc253af8e25f912a991

(this sample)

  
URLhaus
https://urlhaus.abuse.ch/url/3580990/
  
Delivery method
Distributed via web download
  
URLhaus
https://urlhaus.abuse.ch/url/3581003/

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