MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 8d516f87e7e66b9f4cd51e9cc539c6296698f5d22d7e12735571b3ca02360669. 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: 9


Intelligence 9 IOCs YARA 13 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 8d516f87e7e66b9f4cd51e9cc539c6296698f5d22d7e12735571b3ca02360669
SHA3-384 hash: 3c4864c37ad1b612aac64d29d00ebdc9142f9e6c5d0a7538dc42930f334fd956b31400140ce6259b7dc24255d2c3a0bf
SHA1 hash: 5bc7033be5c0ebd18137b415e0627b8f4263080d
MD5 hash: 97c29618118bf9dd08c90abe02cc71b5
humanhash: september-arizona-venus-apart
File name:linux_arm7
Download: download sample
Signature Kaiji
Create hunting rule
File size:5'308'416 bytes
First seen:2025-10-13 05:35:42 UTC
Last seen:Never
File type: elf
MIME type:application/x-executable
ssdeep 49152:PJzG9XxZPF773LVPN9GnMbaVZGNJru8cYWPAXq7nLYvVirzmpxUIU1F1:hzG9Xn53LtN9pbu0Jru8cYWPAXqA
TLSH T149361A57B8D28A42C0E4367AACBDC1C433671EB99B9B12675D04FE3D3ABE1990E35314
telfhash t133c08c068c0c0cac339f83240084220853fb3da4001142690f08a1230c41835b08e07b
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 :
50
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

Result
Verdict:
Malware
Maliciousness:
Verdict:
Unknown
Threat level:
  2.5/10
Confidence:
100%
Tags:
crypto expand golang lolbin
Link:
https://www.filescan.io/uploads/68ec8fb771883144ef339506/reports/87bb89a1-08cf-490f-b12d-5239b4edef4e/overview
Verdict:
Malicious
Uses P2P?:
false
Uses anti-vm?:
false
Architecture:
arm
Packer:
not packed
Botnet:
unknown
Number of open files:
0
Number of processes launched:
0
Processes remaning?
false
Remote TCP ports scanned:
not identified
Full report:
https://elfdigest.com/brief/8d516f87e7e66b9f4cd51e9cc539c6296698f5d22d7e12735571b3ca02360669
Behaviour
no suspicious findings
Botnet C2s
TCP botnet C2(s):
not identified
UDP botnet C2(s):
not identified
Verdict:
Malicious
File Type:
elf.32.le
First seen:
2025-10-13T03:46:00Z UTC
Last seen:
2025-10-13T04:57:00Z UTC
Hits:
~10
Link:
https://opentip.kaspersky.com/8d516f87e7e66b9f4cd51e9cc539c6296698f5d22d7e12735571b3ca02360669/results?tab=lookup
Status:
terminated
Link:
https://sandbox.kunai.rocks/analysis/8ec1fcff-17d7-486c-b3cb-b5823814be68
Behavior Graph:
Download SVG
%3 guuid=ca5a8d6a-1800-0000-566c-ec50790d0000 pid=3449 /usr/bin/sudo guuid=41f85e6c-1800-0000-566c-ec50810d0000 pid=3457 /tmp/sample.bin guuid=ca5a8d6a-1800-0000-566c-ec50790d0000 pid=3449->guuid=41f85e6c-1800-0000-566c-ec50810d0000 pid=3457 execve
Verdict:
Unknown
Link:
https://analyze.intezer.com/analyses/5511cec3-0927-40e6-a84f-aaac21087815
Result
Threat name:
Chaos
Create hunting rule
Detection:
malicious
Classification:
spre.troj.evad
Score:
76 / 100
Link:
https://www.joesandbox.com/analysis/1793772
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
Writes identical ELF files to multiple locations
Yara detected Chaos
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 1793772 Sample: linux_arm7.elf Startdate: 13/10/2025 Architecture: LINUX Score: 76 118 154.201.82.47, 50962, 50966, 50970 PEGTECHINCUS Seychelles 2->118 120 109.202.202.202, 80 INIT7CH Switzerland 2->120 122 4 other IPs or domains 2->122 124 Multi AV Scanner detection for submitted file 2->124 126 Yara detected Chaos 2->126 12 linux_arm7.elf 2->12         started        16 systemd System.img.config 2->16         started        18 systemd snapd-env-generator 2->18         started        20 6 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_arm7.elf linux_arm7.elf 12->22         started        26 linux_arm7.elf service systemctl 12->26         started        28 linux_arm7.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        signatures6 process7 file8 104 /usr/lib/system-monitor, ELF 22->104 dropped 106 /usr/lib/libdlrpcld.so, ELF 22->106 dropped 108 /usr/bin/ss, ELF 22->108 dropped 110 12 other files (11 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 38 linux_arm7.elf bash 22->38         started        42 linux_arm7.elf service systemctl 22->42         started        44 linux_arm7.elf bash 22->44         started        52 5 other processes 22->52 46 service 26->46         started        54 3 other processes 26->54 48 bash 32678 28->48         started        50 sh 32678 30->50         started        56 4 other processes 32->56 signatures9 process10 file11 112 /etc/crontab, ASCII 38->112 dropped 136 Sample tries to persist itself using cron 38->136 58 service 42->58         started        66 3 other processes 42->66 68 4 other processes 44->68 70 2 other processes 46->70 60 32678 sleep 48->60         started        62 32678 id.services.conf 50->62         started        64 32678 sleep 50->64         started        72 4 other processes 52->72 74 2 other processes 56->74 signatures12 process13 process14 76 service systemctl 58->76         started        78 service sed 58->78         started        80 id.services.conf service 62->80         started        82 id.services.conf sh 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 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/8d516f87e7e66b9f4cd51e9cc539c6296698f5d22d7e12735571b3ca02360669
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/8d516f87e7e66b9f4cd51e9cc539c6296698f5d22d7e12735571b3ca02360669/
Threat name:
Linux.Trojan.Kaiji
Create hunting rule
Status:
Malicious
First seen:
2025-10-13 05:36:34 UTC
File Type:
ELF32 Little (Exe)
AV detection:
18 of 24 (75.00%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=rviw7b7h4zvz6tgvd2omkoogfftjr5osfv7be42vogz4uarwazuq._file
Result
Malware family:
kaiji
Create hunting rule
Score:
  10/10
Tags:
family:kaiji defense_evasion discovery execution persistence privilege_escalation ransomware
Link:
https://tria.ge/reports/251013-gaenbsbr2w/
Behaviour
Enumerates kernel/hardware configuration
Reads runtime system information
Changes its process name
Modifies Bash startup script
Creates/modifies Cron job
Creates/modifies environment variables
Enumerates running processes
Modifies init.d
Modifies systemd
Write file to user bin folder
Executes dropped EXE
Modifies Watchdog functionality
Renames multiple (1004) files with added filename extension
Malware Config
C2 Extraction:
154.201.82.47:809
Verdict:
Unknown
Tags:
trojan kaiji chaos
YARA:
ELF_Kaiji_Chaos_April_2024
Link:
https://app.threat.zone/submission/575c80aa-18c6-43ef-966d-c412eac7738c
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/8d516f87e7e66b9f4cd51e9cc539c6296698f5d22d7e12735571b3ca02360669

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:CP_Script_Inject_Detector
Create hunting rule
Author:DiegoAnalytics
Description:Detects attempts to inject code into another process across PE, ELF, Mach-O binaries
Rule name:DetectEncryptedVariants
Create hunting rule
Author:Zinyth
Description:Detects 'encrypted' in ASCII, Unicode, base64, or hex-encoded
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:golang
Create hunting rule
Rule name:identity_golang
Create hunting rule
Author:Eric Yocam
Description:find Golang malware
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: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 8d516f87e7e66b9f4cd51e9cc539c6296698f5d22d7e12735571b3ca02360669

(this sample)

  
URLhaus
https://urlhaus.abuse.ch/url/3581018/
  
Delivery method
Distributed via web download

Comments