MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 a3a4ce9bb316c707d4d6ce57f4094c8661653bcf62ff962264646ffe036477c3. 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


Threat unknown


Vendor detections: 8


Intelligence 8 IOCs YARA 7 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: a3a4ce9bb316c707d4d6ce57f4094c8661653bcf62ff962264646ffe036477c3
SHA3-384 hash: 9eda3e3c3a46bb8788fc8961f3988b4876259b6f77241bef8d41c7156f3eeca48dec30887a9e3166fa8af058d9889413
SHA1 hash: a227b569dbf535d7494efee58847a46dd6adce1c
MD5 hash: fd9d8ec98df596d3688d0caac08c3efb
humanhash: earth-paris-tango-fanta
File name:Document_45.doc.lnk
Download: download sample
File size:1'993 bytes
First seen:2023-12-08 09:27:47 UTC
Last seen:2023-12-15 09:13:27 UTC
File type:Shortcut (lnk) lnk
MIME type:application/octet-stream
ssdeep 24:84JYdBRg0OEAUFSyL0erUMkWI9wCc5zFUWS9Zm:81ZYDyL0erHyEu9Z
TLSH T1F741D01227C60720D2E54A36ACBAA710ED697C0BEB07CF6D01C1975C5C61510D864F7E
Reporter cocaman
Tags:lnk

Intelligence

File Origin
# of uploads :
239
# of downloads :
192
Origin country :
CH CH
Vendor Threat Intelligence
Detection(s):
Sanesecurity.Malware.27118.LnkHeur.UNOFFICIAL
Create hunting rule

Sanesecurity.Malware.26415.PshHeur.UNOFFICIAL
Create hunting rule

SecuriteInfo.com.LNK.Powershell-B.30288.6761.UNOFFICIAL
Create hunting rule

MiscreantPunch.INFO.LNK.CMDPSHELL.UNOFFICIAL
Create hunting rule

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

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

TwinWave.EvilLNK.OddLook.20221214.UNOFFICIAL
Create hunting rule

Verdict:
Malicious
Threat level:
  10/10
Confidence:
100%
Tags:
cmd dropper lolbin masquerade powershell shell32
Link:
https://www.filescan.io/uploads/6572e1a418cffa73b1de7188/reports/1d57f17e-b56f-49ed-bf4a-892e9f8b6f93/overview
Verdict:
Malicious
Labled as:
BZC.YAX.Boxter.251.4E1043A7;BZC.YAX.Boxter.251
Link:
https://www.hybrid-analysis.com/sample/a3a4ce9bb316c707d4d6ce57f4094c8661653bcf62ff962264646ffe036477c3
Result
Verdict:
MALICIOUS
Result
Threat name:
n/a
Detection:
malicious
Classification:
rans.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1356083
Signature
Antivirus / Scanner detection for submitted sample
Antivirus detection for dropped file
Antivirus detection for URL or domain
Bypasses PowerShell execution policy
Drops executables to the windows directory (C:\Windows) and starts them
Drops PE files to the user root directory
Found evasive API chain (may stop execution after checking mutex)
Found URL in windows shortcut file (LNK)
Hides that the sample has been downloaded from the Internet (zone.identifier)
Machine Learning detection for dropped file
Machine Learning detection for sample
Multi AV Scanner detection for dropped file
Multi AV Scanner detection for submitted file
Powershell drops PE file
Sigma detected: Powershell download and execute file
Snort IDS alert for network traffic
Suspicious powershell command line found
Tries to download and execute files (via powershell)
Uses an obfuscated file name to hide its real file extension (double extension)
Windows shortcut file (LNK) contains suspicious command line arguments
Windows shortcut file (LNK) starts blacklisted processes
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 1356083 Sample: Document_45.doc.lnk Startdate: 08/12/2023 Architecture: WINDOWS Score: 100 32 twizt.net 2->32 40 Snort IDS alert for network traffic 2->40 42 Antivirus detection for URL or domain 2->42 44 Antivirus / Scanner detection for submitted sample 2->44 46 7 other signatures 2->46 9 cmd.exe 1 2->9         started        12 winsvc.exe 2->12         started        signatures3 process4 signatures5 56 Windows shortcut file (LNK) starts blacklisted processes 9->56 58 Suspicious powershell command line found 9->58 60 Tries to download and execute files (via powershell) 9->60 62 Bypasses PowerShell execution policy 9->62 14 powershell.exe 14 29 9->14         started        19 conhost.exe 1 9->19         started        process6 dnsIp7 34 twizt.net 185.215.113.84, 49704, 49705, 49706 WHOLESALECONNECTIONSNL Portugal 14->34 30 C:\Users\user\windrv.exe, PE32 14->30 dropped 36 Drops PE files to the user root directory 14->36 38 Powershell drops PE file 14->38 21 windrv.exe 1 2 14->21         started        file8 signatures9 process10 file11 28 C:\Windows\winsvc.exe, PE32 21->28 dropped 48 Antivirus detection for dropped file 21->48 50 Multi AV Scanner detection for dropped file 21->50 52 Found evasive API chain (may stop execution after checking mutex) 21->52 54 3 other signatures 21->54 25 winsvc.exe 12 21->25         started        signatures12 process13 signatures14 64 Antivirus detection for dropped file 25->64 66 Multi AV Scanner detection for dropped file 25->66 68 Found evasive API chain (may stop execution after checking mutex) 25->68 70 2 other signatures 25->70
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/a3a4ce9bb316c707d4d6ce57f4094c8661653bcf62ff962264646ffe036477c3/
Threat name:
Shortcut.Trojan.Genautorunlnkfile
Create hunting rule
Status:
Malicious
First seen:
2023-12-08 06:37:38 UTC
File Type:
Binary
AV detection:
14 of 22 (63.64%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=uosm5g5tc3dqpvgwzzl7ickmqzqwko6pml7zmitemrx74a3eo7bq._file
Result
Malware family:
n/a
Score:
  10/10
Tags:
persistence
Link:
https://tria.ge/reports/231208-lfhdmaac94/
Behaviour
Suspicious behavior: EnumeratesProcesses
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
Enumerates physical storage devices
Drops file in Windows directory
Adds Run key to start application
Checks computer location settings
Executes dropped EXE
Blocklisted process makes network request
Downloads MZ/PE file
Malware Config
Dropper Extraction:
http://twizt.net/spml.exe
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/a3a4ce9bb316/report/overview.html
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/a3a4ce9bb316c707d4d6ce57f4094c8661653bcf62ff962264646ffe036477c3

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:Execution_in_LNK
Create hunting rule
Author:@bartblaze
Description:Identifies execution artefacts in shortcut (LNK) files.
Rule name:EXE_in_LNK
Create hunting rule
Author:@bartblaze
Description:Identifies executable 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:SUSP_LNK_CMD
Create hunting rule
Author:SECUINFRA Falcon Team
Description:Detects the reference to cmd.exe inside an lnk file, which is suspicious
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.

Malspam

zip 731b59b177acf002ee1dfe01857bac75b2288724bf5ef9963e1b4137b125cf88

Shortcut (lnk) lnk a3a4ce9bb316c707d4d6ce57f4094c8661653bcf62ff962264646ffe036477c3

(this sample)

  
Delivery method
Other
  
Dropped by
SHA256 731b59b177acf002ee1dfe01857bac75b2288724bf5ef9963e1b4137b125cf88
  
Dropped by
MD5 f603a80888ecdddcad8bc9c293a00345

Comments