MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 a4c1553e6f8e8cce581c7e9598124f7eabfb6c57842a9aff454ee6eff0f6810e. 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 11 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: a4c1553e6f8e8cce581c7e9598124f7eabfb6c57842a9aff454ee6eff0f6810e
SHA3-384 hash: 208ccc8fd2d4f5a1449316c20cedf9d04de56db81dd62bb22b8af78cba17268857df16dea7bbe4ab7168208979264c76
SHA1 hash: e41249f3e8d4207f0e1e4fd49b893635ebe09a92
MD5 hash: 5d6dd764b702a66c1176d68a2ed64d5d
humanhash: pasta-berlin-nuts-minnesota
File name:Details Of Our PO.zip
Download: download sample
Signature Formbook
Create hunting rule
File size:715'512 bytes
First seen:2025-04-17 07:50:21 UTC
Last seen:Never
File type: zip
MIME type:application/zip
ssdeep 12288:8XLHnO/GEaHOEgTGZaLqkvm+LOCHEtB3t9fFQ3bvxEXAruEkW0L5k8kn:kLwfaHBDYqkrOlBdSbvxEXouEkBNYn
TLSH T118E423A1CEF58D0C6813238E649AA59109A2B4E3465BFD6015652A741FDCDFB200FFEF
Magika zip
Reporter cocaman
Tags:FormBook zip


Avatar
cocaman
Malicious email (T1566.001)
From: "=?UTF-8?B?UnVvLVNpbiBTeXUo6Kix6Iul5b+DKQ==?= <op.mnc@mnci.co.kr>" (likely spoofed)
Received: "from mnci.co.kr (unknown [141.98.10.13]) "
Date: "16 Apr 2025 14:10:23 +0200"
Subject: "Details Of Our PO."
Attachment: "Details Of Our PO.zip"

Intelligence

File Origin
# of uploads :
1
# of downloads :
548
Origin country :
CH CH
File Archive Information

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

File name:Details Of Our PO..exe
File size:786'944 bytes
SHA256 hash: 1abb2bfc4898bc01d9af8659741081e4bfa1bb4fe400194845e2e17ed28cf205
MD5 hash: 43a70cf8778adf3fedc88dd16edefd27
MIME type:application/x-dosexec
Signature Formbook
Vendor Threat Intelligence
Detection(s):
Sanesecurity.Foxhole.Zip_Hideexe.5.UNOFFICIAL
Create hunting rule

SecuriteInfo.com.MSIL.Kryptik.WZA.UNOFFICIAL
Create hunting rule

Verdict:
Malicious
Score:
96.5%
Link:
https://cyber-fortress.com/docs/result/index.php?id=67ffa63d954c9c53de0bc7ac
Tags:
virus micro msil
Result
Verdict:
Unknown
File Type:
PE File
Link:
https://app.docguard.net/a4c1553e6f8e8cce581c7e9598124f7eabfb6c57842a9aff454ee6eff0f6810e/results/dashboard
Verdict:
Likely Malicious
Threat level:
  7.5/10
Confidence:
100%
Tags:
obfuscated packed packed packer_detected vbnet
Link:
https://www.filescan.io/uploads/6800b2c890767142c3d8a3ba/reports/7441631b-825b-4453-a00e-16f9573341f0/overview
Verdict:
Malicious
Labled as:
Trojan.Generic
Link:
https://www.hybrid-analysis.com/sample/a4c1553e6f8e8cce581c7e9598124f7eabfb6c57842a9aff454ee6eff0f6810e
Result
Verdict:
MALICIOUS
Link:
https://labs.inquest.net/dfi/sha256/a4c1553e6f8e8cce581c7e9598124f7eabfb6c57842a9aff454ee6eff0f6810e
Score:
100%
Verdict:
Malware
File Type:
ARCHIVE
Link:
https://malprob.io/report/a4c1553e6f8e8cce581c7e9598124f7eabfb6c57842a9aff454ee6eff0f6810e
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/a4c1553e6f8e8cce581c7e9598124f7eabfb6c57842a9aff454ee6eff0f6810e/
Threat name:
Win32.Backdoor.FormBook
Create hunting rule
Status:
Malicious
First seen:
2025-04-16 08:11:33 UTC
File Type:
Binary (Archive)
Extracted files:
10
AV detection:
28 of 38 (73.68%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=utavkptpr2gm4wa4p2kzqespp2v7w3cxqqvjv72fj3to74hwqeha._file
Result
Malware family:
n/a
Score:
  5/10
Tags:
discovery
Link:
https://tria.ge/reports/250417-jsb19strt2/
Behaviour
Suspicious behavior: EnumeratesProcesses
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
System Location Discovery: System Language Discovery
Suspicious use of SetThreadContext
Please note that we are no longer able to provide a coverage score for Virus Total.

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: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: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)
Rule name:win32_dotnet_form_obfuscate
Create hunting rule
Author:Reedus0
Description:Rule for detecting .NET form obfuscate malware

File information

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

Malspam

Formbook

zip a4c1553e6f8e8cce581c7e9598124f7eabfb6c57842a9aff454ee6eff0f6810e

(this sample)

Formbook

Executable exe 1abb2bfc4898bc01d9af8659741081e4bfa1bb4fe400194845e2e17ed28cf205

  
Delivery method
Distributed via e-mail attachment
  
Dropping
SHA256 1abb2bfc4898bc01d9af8659741081e4bfa1bb4fe400194845e2e17ed28cf205
  
Dropping
Formbook
  
Dropping
MD5 43a70cf8778adf3fedc88dd16edefd27

Comments