MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 f87cf2f67dbbbe69e14dc40cca510ec19034f1787b6c4167c1fae078f3fe5aed. 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


KoiStealer


Vendor detections: 9


Intelligence 9 IOCs YARA 5 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: f87cf2f67dbbbe69e14dc40cca510ec19034f1787b6c4167c1fae078f3fe5aed
SHA3-384 hash: 85bf0c159a89b59405dadf918a289b5980fd8ce3d10fc1b8003f9b27b569e8ab5e912070b9cae0e25e224dc30e8d90d7
SHA1 hash: 43d38dd7f2c22f927f847ffb1a424a23d74832b8
MD5 hash: 8e5e5408944104b9dc5643bef523f42e
humanhash: monkey-december-burger-bluebird
File name:citi_april_2025.lnk
Download: download sample
Signature KoiStealer
Create hunting rule
File size:1'535 bytes
First seen:2025-04-25 08:33:44 UTC
Last seen:Never
File type:Shortcut (lnk) lnk
MIME type:application/x-ms-shortcut
ssdeep 24:8xsepxZraf4UTaiJIACgZNWPnCyOSjy6SDuFxs3n+pf/rRFxoYr3Shbp8P8EUUzz:8Bvraf4iRIA7ZyCyOSjy6SDuFY+x/tFx
TLSH T16A31225036F90718E1B34F7DA87A6741C87F3D199D36C38D0510D1980962E15D8B9F37
Magika lnk
Reporter abuse_ch
Tags:KoiStealer lnk

Intelligence

File Origin
# of uploads :
1
# of downloads :
61
Origin country :
NL NL
Vendor Threat Intelligence
Detection(s):
Sanesecurity.Malware.30777.LnkHeur.UNOFFICIAL
Create hunting rule

TwinWave.EvilLNK.LOLBinOddLook.20220523.UNOFFICIAL
Create hunting rule

TwinWave.EvilLNK.LOLBinOddLook.20220622.UNOFFICIAL
Create hunting rule

TwinWave.EvilLNK.LOLBinOddLookPSHELL.20220711.UNOFFICIAL
Create hunting rule

TwinWave.EvilLNK.OddLook.202207213.UNOFFICIAL
Create hunting rule

TwinWave.EvilLNK.KingForADaypshell.20231121.UNOFFICIAL
Create hunting rule

Verdict:
Malicious
Score:
97.4%
Link:
https://cyber-fortress.com/docs/result/index.php?id=6809384fa37ff28e1298cc7e
Tags:
autorun emotet cobalt spoof
Result
Verdict:
Malicious
File Type:
LNK File - Malicious
Link:
https://app.docguard.net/f87cf2f67dbbbe69e14dc40cca510ec19034f1787b6c4167c1fae078f3fe5aed/results/dashboard
Payload URLs
URL
File name
https://www.wilkinsonbeane.com/css/slider/ynebhc.php',
LNK File
Behaviour
BlacklistAPI detected
Verdict:
Likely Malicious
Threat level:
  7.5/10
Confidence:
100%
Tags:
autorun fingerprint
Link:
https://www.filescan.io/uploads/680b4907212716475faed062/reports/0650f343-e5aa-4376-a7aa-ffe0e51081b9/overview
Verdict:
Unknown
Link:
https://www.hybrid-analysis.com/sample/f87cf2f67dbbbe69e14dc40cca510ec19034f1787b6c4167c1fae078f3fe5aed
Result
Threat name:
n/a
Detection:
malicious
Classification:
expl.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1673928
Signature
Joe Sandbox ML detected suspicious sample
Multi AV Scanner detection for submitted file
Obfuscated command line found
Sigma detected: Potentially Suspicious PowerShell Child Processes
Sigma detected: PowerShell DownloadFile
Sigma detected: WScript or CScript Dropper
Suspicious execution chain found
Suspicious powershell command line found
Tries to download and execute files (via powershell)
Uses schtasks.exe or at.exe to add and modify task schedules
Windows Scripting host queries suspicious COM object (likely to drop second stage)
Windows shortcut file (LNK) contains suspicious command line arguments
Windows shortcut file (LNK) starts blacklisted processes
Wscript starts Powershell (via cmd or directly)
Yara detected Powershell download and execute
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 1673928 Sample: citi_april_2025.lnk Startdate: 25/04/2025 Architecture: WINDOWS Score: 100 53 www.wilkinsonbeane.com 2->53 55 wilkinsonbeane.com 2->55 63 Windows shortcut file (LNK) starts blacklisted processes 2->63 65 Multi AV Scanner detection for submitted file 2->65 67 Yara detected Powershell download and execute 2->67 69 8 other signatures 2->69 8 wscript.exe 1 1 2->8         started        11 powershell.exe 14 22 2->11         started        15 wscript.exe 2->15         started        17 2 other processes 2->17 signatures3 process4 dnsIp5 71 Windows shortcut file (LNK) starts blacklisted processes 8->71 73 Suspicious powershell command line found 8->73 75 Wscript starts Powershell (via cmd or directly) 8->75 77 Windows Scripting host queries suspicious COM object (likely to drop second stage) 8->77 19 powershell.exe 7 8->19         started        59 wilkinsonbeane.com 162.215.168.185, 443, 49681, 49684 UNIFIEDLAYER-AS-1US United States 11->59 51 C:\ProgramData\huf071ssng4dy7.js, ASCII 11->51 dropped 79 Uses schtasks.exe or at.exe to add and modify task schedules 11->79 81 Suspicious execution chain found 11->81 21 curl.exe 2 11->21         started        24 conhost.exe 1 11->24         started        26 schtasks.exe 1 11->26         started        28 powershell.exe 15->28         started        30 powershell.exe 17->30         started        file6 signatures7 process8 dnsIp9 32 wscript.exe 19->32         started        35 conhost.exe 19->35         started        37 schtasks.exe 1 19->37         started        57 127.0.0.1 unknown unknown 21->57 39 conhost.exe 28->39         started        41 schtasks.exe 1 28->41         started        43 wscript.exe 28->43         started        45 conhost.exe 30->45         started        47 schtasks.exe 1 30->47         started        49 wscript.exe 30->49         started        process10 signatures11 61 Windows Scripting host queries suspicious COM object (likely to drop second stage) 32->61
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/f87cf2f67dbbbe69e14dc40cca510ec19034f1787b6c4167c1fae078f3fe5aed/
Threat name:
Shortcut.Trojan.Pantera
Create hunting rule
Status:
Malicious
First seen:
2025-04-23 18:52:14 UTC
File Type:
Binary
AV detection:
14 of 24 (58.33%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=7b6pf5t5xo7gtyknyqgmuuioygidj4lypnwecz6b7lqhr476llwq._file
Result
Malware family:
koistealer
Create hunting rule
Score:
  10/10
Tags:
family:koiloader family:koistealer defense_evasion discovery execution loader stealer
Link:
https://tria.ge/reports/250425-kghv4swjt5/
Behaviour
Scheduled Task/Job: Scheduled Task
Suspicious behavior: EnumeratesProcesses
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
Uses Task Scheduler COM API
Command and Scripting Interpreter: JavaScript
Enumerates physical storage devices
System Location Discovery: System Language Discovery
Indicator Removal: Clear Persistence
Checks computer location settings
Blocklisted process makes network request
Command and Scripting Interpreter: PowerShell
Detects KoiLoader payload
Detects KoiStealer payload
KoiLoader
KoiStealer
Koiloader family
Koistealer family
Malware Config
C2 Extraction:
http://79.124.78.173/incongruousness.php
Dropper Extraction:
https://www.wilkinsonbeane.com/css/slider/ynebhc.php
https://www.wilkinsonbeane.com/css/slider
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Malicious File
Score:
1.00
Link:
https://yomi.yoroi.company/submissions/f87cf2f67dbbbe69e14dc40cca510ec19034f1787b6c4167c1fae078f3fe5aed

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:Download_in_LNK
Create hunting rule
Author:@bartblaze
Description:Identifies download artefacts in shortcut (LNK) files.
Rule name:PS_in_LNK
Create hunting rule
Author:@bartblaze
Description:Identifies PowerShell artefacts in shortcut (LNK) files.
Rule name:Script_in_LNK
Create hunting rule
Author:@bartblaze
Description:Identifies scripting artefacts in shortcut (LNK) files.
Rule name:SUSP_LNK_PowerShell
Create hunting rule
Author:SECUINFRA Falcon Team
Description:Detects the reference to powershell inside an lnk file, which is suspicious
Rule name:SUSP_LNK_SuspiciousCommands
Create hunting rule
Author:Florian Roth (Nextron Systems)
Description:Detects LNK file with suspicious content

File information

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

Comments