MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 3b431fd8a9d3fca1fd89b3c9a09c576830d3c5d7caac857ac524671c954b80c7. 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


Formbook


Vendor detections: 8


Intelligence 8 IOCs YARA 22 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 3b431fd8a9d3fca1fd89b3c9a09c576830d3c5d7caac857ac524671c954b80c7
SHA3-384 hash: 803117226ff7ed2182c4839c434467c67c10ccc1a04c5c48bab19eea3ee12942c494d2a58a46b25fbf7ea368a9b9b169
SHA1 hash: 956ca1465564f9418194b284acb21bb655cbdd5c
MD5 hash: d03a57875772a335cb5efa350633cdaa
humanhash: neptune-august-item-alaska
File name:BIGG.zip
Download: download sample
Signature Formbook
Create hunting rule
File size:24'077 bytes
First seen:2025-05-27 16:10:56 UTC
Last seen:Never
File type: zip
MIME type:application/zip
ssdeep 384:0+VOdssQ0HJ6BS58CwLN4cLOGMa3WXxmLnSxJEeMFiz9P/8nk4ibGHYzNgy5kRjn:b/0UBXzPMa3+xESAex938sfBgbd2Wz9
TLSH T1E9B2E1BBC0BA01C5CB95C6F798E50631C48066D37A89611A2D7BEBADD4633982C7CB44
Magika zip
Reporter JAMESWT_WT
Tags:176-65-142-252 FormBook zip

Intelligence

File Origin
# of uploads :
1
# of downloads :
460
Origin country :
IT IT
File Archive Information

This file archive contains 1 file(s), sorted by their relevance:

File name:BIGG.exe
File size:53'248 bytes
SHA256 hash: ab005eae847f8e1aab6a1af58b8dc5d194c77c5d17279fa824929501f397879a
MD5 hash: f060b7d70670ed2d36cbce7e936d177a
MIME type:application/x-dosexec
Signature Formbook
Vendor Threat Intelligence
Detection(s):
SecuriteInfo.com.Trojan.KillProc2.24550.12382.27364.UNOFFICIAL
Create hunting rule

Verdict:
Malicious
Score:
92.5%
Link:
https://cyber-fortress.com/docs/result/index.php?id=6835e694acf88f5815e7a1ec
Tags:
n/a
Result
Verdict:
Unknown
File Type:
PE File
Link:
https://app.docguard.net/3b431fd8a9d3fca1fd89b3c9a09c576830d3c5d7caac857ac524671c954b80c7/results/dashboard
Verdict:
Malicious
Threat level:
  10/10
Confidence:
100%
Tags:
aspnet_compiler base64 lolbin net_reactor obfuscated obfuscated packed packed zero
Link:
https://www.filescan.io/uploads/6835e421fd02ed5e058a9771/reports/33399e49-fc9f-45a6-b95a-b60197894dda/overview
Verdict:
Suspicious
Labled as:
Ransom.Sabsik
Link:
https://www.hybrid-analysis.com/sample/3b431fd8a9d3fca1fd89b3c9a09c576830d3c5d7caac857ac524671c954b80c7
Result
Verdict:
UNKNOWN
Link:
https://labs.inquest.net/dfi/sha256/3b431fd8a9d3fca1fd89b3c9a09c576830d3c5d7caac857ac524671c954b80c7
Details
Windows PE Executable
Found a Windows Portable Executable (PE) binary. Depending on context, the presence of a binary is suspicious or malicious.
Score:
97%
Verdict:
Malware
File Type:
ARCHIVE
Link:
https://malprob.io/report/3b431fd8a9d3fca1fd89b3c9a09c576830d3c5d7caac857ac524671c954b80c7
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/3b431fd8a9d3fca1fd89b3c9a09c576830d3c5d7caac857ac524671c954b80c7/
Threat name:
Win32.Trojan.Etset
Create hunting rule
Status:
Malicious
First seen:
2025-05-27 16:02:41 UTC
File Type:
Binary (Archive)
Extracted files:
7
AV detection:
19 of 24 (79.17%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=hnbr7wfj2p6kd7mjwpe2bhcxnaynhroxzkwik6wfertrzfklqddq._file
Result
Malware family:
n/a
Score:
  8/10
Tags:
discovery
Link:
https://tria.ge/reports/250527-t5zyzadl5v/
Behaviour
Suspicious behavior: EnumeratesProcesses
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
System Location Discovery: System Language Discovery
Suspicious use of SetThreadContext
Downloads MZ/PE file
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Formbook
Score:
1.00
Link:
https://yomi.yoroi.company/submissions/3b431fd8a9d3fca1fd89b3c9a09c576830d3c5d7caac857ac524671c954b80c7

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:AgentTesla
Create hunting rule
Author:Harish Kumar P
Description:Yara Rule to Detect AgentTesla
Rule name:BAZT_B5_NOCEXInvalidStream
Create hunting rule
Rule name:DotNet_Reactor
Create hunting rule
Author:@bartblaze
Description:Identifies .NET Reactor, which offers .NET code protection such as obfuscation, encryption and so on.
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:NETexecutableMicrosoft
Create hunting rule
Author:malware-lu
Rule name:pe_imphash
Create hunting rule
Rule name:pe_no_import_table
Create hunting rule
Description:Detect pe file that no import table
Rule name:PureCrypter
Create hunting rule
Author:@bartblaze
Description:Identifies PureCrypter, .NET loader and obfuscator.
Reference:https://malpedia.caad.fkie.fraunhofer.de/details/win.purecrypter
Rule name:shellcode
Create hunting rule
Author:nex
Description:Matched shellcode byte patterns
Rule name:Skystars_Malware_Imphash
Create hunting rule
Author:Skystars LightDefender
Description:imphash
Rule name:Sus_Obf_Enc_Spoof_Hide_PE
Create hunting rule
Author:XiAnzheng
Description:Check for Overlay, Obfuscating, Encrypting, Spoofing, Hiding, or Entropy Technique(can create FP)

File information

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

Web download

Formbook

zip 3b431fd8a9d3fca1fd89b3c9a09c576830d3c5d7caac857ac524671c954b80c7

(this sample)

  
URLhaus
https://urlhaus.abuse.ch/url/3553687/
  
Delivery method
Distributed via web download

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