MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 a667c2761c72f20c0b20959a52103d8c8160f32168592527065df4b605e3951d. 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 22 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: a667c2761c72f20c0b20959a52103d8c8160f32168592527065df4b605e3951d
SHA3-384 hash: 90ae8ae97f825c786fabd06b79f080467137676be67a0894bf2b36e2588befa4b27397b7494d59dbd0b75c41ccdaf5f4
SHA1 hash: 92c818cb9ed5bb77a561e2db71641528fe87eaeb
MD5 hash: 3d07fda9929dbde06cf45b61dbd95a81
humanhash: uncle-sweet-ack-lemon
File name:linux_arm7
Download: download sample
Signature Kaiji
Create hunting rule
File size:5'242'880 bytes
First seen:2024-09-21 18:59:16 UTC
Last seen:Never
File type: elf
MIME type:application/x-executable
ssdeep 49152:Dx+8QIc65Q5pjPhDWacY/rzwS0sELVI1:Dxd5c6k5DE
TLSH T111363C4BB8924682C4E4367ABC7D81D473B34EB99B9713666D04FE3C3ABE1990E35314
telfhash t100d012669b06265c3796c158124c4d9104ec38e529b132ae8f686b575e03871364d13f
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 NDA0E
Tags:elf kaiji

Intelligence

File Origin
# of uploads :
1
# of downloads :
92
Origin country :
NL NL
Vendor Threat Intelligence
Detection(s):
Unix.Malware.Kaiji-10003730-0
Create hunting rule

Unix.Malware.Kaiji-10003917-0
Create hunting rule

Unix.Malware.Kaiji-10028246-0
Create hunting rule

Result
Verdict:
Malware
Maliciousness:
Verdict:
Unknown
Threat level:
  2.5/10
Confidence:
100%
Tags:
anti-debug expand golang lolbin
Link:
https://www.filescan.io/uploads/66ef17b55e9303a294238517/reports/a9f466b9-a441-40e5-a02a-12aafdb71188/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/a667c2761c72f20c0b20959a52103d8c8160f32168592527065df4b605e3951d
Behaviour
no suspicious findings
Botnet C2s
TCP botnet C2(s):
not identified
UDP botnet C2(s):
not identified
Result
Verdict:
SUSPICIOUS
Verdict:
Unknown
Link:
https://analyze.intezer.com/analyses/2a00bfc8-db94-4f24-8716-ded771709e12
Result
Threat name:
Kaiji
Create hunting rule
Detection:
malicious
Classification:
spre.troj.evad
Score:
76 / 100
Link:
https://www.joesandbox.com/analysis/1515154
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 Kaiji
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 1515154 Sample: linux_arm7.elf Startdate: 21/09/2024 Architecture: LINUX Score: 76 99 cc.ava9527.cc 23.224.121.29, 44014, 44016, 44018 CNSERVERSUS United States 2->99 101 www.google.com 2->101 105 Multi AV Scanner detection for submitted file 2->105 107 Yara detected Kaiji 2->107 11 linux_arm7.elf 2->11         started        13 systemd cron 2->13         started        15 systemd cron 2->15         started        17 6 other processes 2->17 signatures3 process4 process5 19 linux_arm7.elf linux_arm7.elf 11->19         started        23 cron 13->23         started        25 cron 15->25         started        27 System.mod System.mod 17->27         started        29 System.mod System.mod 17->29         started        file6 89 /usr/lib/system-mark, ELF 19->89 dropped 91 /usr/lib/libgdi.so.0.8.1, ELF 19->91 dropped 93 /usr/bin/ss, ELF 19->93 dropped 95 63 other files (62 malicious) 19->95 dropped 109 Sample tries to set files in /etc globally writable 19->109 111 Writes identical ELF files to multiple locations 19->111 113 Sample tries to persist itself using /etc/profile 19->113 115 Drops files in suspicious directories 19->115 31 linux_arm7.elf bash 19->31         started        35 linux_arm7.elf bash 19->35         started        37 linux_arm7.elf service systemctl 19->37         started        43 6 other processes 19->43 39 cron sh 23->39         started        41 cron sh 25->41         started        signatures7 process8 file9 97 /etc/crontab, ASCII 31->97 dropped 103 Sample tries to persist itself using cron 31->103 45 bash 32675 35->45         started        47 service 37->47         started        49 service basename 37->49         started        51 service basename 37->51         started        53 service systemctl 37->53         started        55 sh .mod 39->55         started        57 sh .mod 41->57         started        59 service 43->59         started        61 10 other processes 43->61 signatures10 process11 process12 63 32675 opt.services.cfg 45->63         started        65 32675 opt.services.cfg 45->65         started        79 2 other processes 45->79 67 service systemctl 47->67         started        69 service sed 47->69         started        71 .mod libgdi.so.0.8.1 55->71         started        73 .mod libgdi.so.0.8.1 57->73         started        75 service systemctl 59->75         started        77 service sed 59->77         started        process13 81 opt.services.cfg opt.services.cfg 63->81         started        83 opt.services.cfg opt.services.cfg 65->83         started        85 libgdi.so.0.8.1 libgdi.so.0.8.1 71->85         started        87 libgdi.so.0.8.1 libgdi.so.0.8.1 73->87         started       
Score:
100%
Verdict:
Malware
File Type:
ELF
Link:
https://malprob.io/report/a667c2761c72f20c0b20959a52103d8c8160f32168592527065df4b605e3951d
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/a667c2761c72f20c0b20959a52103d8c8160f32168592527065df4b605e3951d/
Threat name:
Linux.Trojan.Kaiji
Create hunting rule
Status:
Malicious
First seen:
2024-09-21 19:00:07 UTC
File Type:
ELF32 Little (Exe)
AV detection:
16 of 24 (66.67%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=uzt4e5q4olzayczaswnfeeb5rsawb4zbnbmskjyglx2lmbpdsuoq._file
Result
Malware family:
kaiji
Create hunting rule
Score:
  10/10
Tags:
family:kaiji defense_evasion discovery execution persistence privilege_escalatio privilege_escalation ransomware
Link:
https://tria.ge/reports/240921-xnmtvsyclp/
Behaviour
Command and Scripting Interpreter: Unix Shell
Enumerates kernel/hardware configuration
Reads runtime system information
Modifies Bash startup script
Creates/modifies Cron job
Creates/modifies environment variables
Disables SELinux
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:
cc.ava9527.cc:60888
Verdict:
Suspicious
Tags:
n/a
YARA:
n/a
Link:
https://app.threat.zone/submission/aeca3059-dda9-49e5-afb3-841ad2281c4b
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/a667c2761c72f20c0b20959a52103d8c8160f32168592527065df4b605e3951d

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:Detect_APT29_WINELOADER_Backdoor
Create hunting rule
Author:daniyyell
Description:Detects APT29's WINELOADER backdoor variant used in phishing campaigns, this rule also detect bad pdf,shtml,htm and vbs or maybe more depends
Reference:https://cloud.google.com/blog/topics/threat-intelligence/apt29-wineloader-german-political-parties
Rule name:Detect_Malicious_VBScript_Base64
Create hunting rule
Author:daniyyell
Description:Detects malicious VBScript patterns, including Base64 decoding, file operations, and PowerShell.
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:Linux_Generic_Threat_cd9ce063
Create hunting rule
Author:Elastic Security
Rule name:MD5_Constants
Create hunting rule
Author:phoul (@phoul)
Description:Look for MD5 constants
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:test_Malaysia
Create hunting rule
Author:rectifyq
Description:Detects file containing malaysia string
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 a667c2761c72f20c0b20959a52103d8c8160f32168592527065df4b605e3951d

(this sample)

  
URLhaus
https://urlhaus.abuse.ch/url/3185015/
  
Delivery method
Distributed via web download

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