MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 543b79100c980122ce6bfa54b78765da0089ff34b33ca6cf5e9ecdc7ba5e43b2. 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 7 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 543b79100c980122ce6bfa54b78765da0089ff34b33ca6cf5e9ecdc7ba5e43b2
SHA3-384 hash: 7d0a5242e415283ed9fa9d257f972e41fa32386c9bd20de5607479955f507459f84cb50e3167779c8a20a58b2a944867
SHA1 hash: 22668d49124aa0674ac00718d846d7b59623f7a9
MD5 hash: 1a09938f23fe83b135ba3b157912b2aa
humanhash: pluto-mars-one-three
File name:Doc Proposed Checklist.rar
Download: download sample
Signature Formbook
Create hunting rule
File size:700'399 bytes
First seen:2025-10-28 10:50:28 UTC
Last seen:2025-10-28 12:59:16 UTC
File type: rar
MIME type:application/x-rar
ssdeep 12288:k/YaiwSpyIz3Kp/5H+Z6guqONkvnq6Oqfw14YdtCd0iSV0pp58KWCM/3S:kgNwSpyISJ+ZoqO8hi1DdtCdkqD58FC1
TLSH T18EE423BA473C6290934A9EDC6140F25AC4384CEFC1DBC975574C663D2F8CD62A6C8B9B
TrID 61.5% (.RAR) RAR compressed archive (v5.0) (8000/1)
38.4% (.RAR) RAR compressed archive (gen) (5000/1)
Magika rar
Reporter cocaman
Tags:FormBook rar Shipping


Avatar
cocaman
Malicious email (T1566.001)
From: "import1.chn@insooryaexpresscargo.com" (likely spoofed)
Received: "from insooryaexpresscargo.com (unknown [23.94.177.48]) "
Date: "28 Oct 2025 13:57:52 +0100"
Subject: "Re: Shipping Doc Proposed Checklist"
Attachment: "Doc Proposed Checklist.rar"

Intelligence

File Origin
# of uploads :
17
# of downloads :
76
Origin country :
CH CH
File Archive Information

This file archive contains 2 file(s), sorted by their relevance:

File name:Doc Proposed Checklist.scr
File size:780'808 bytes
SHA256 hash: d374091cdaf72ea9673f8e9d63eebaefc9315a3511f0194dda15252ebb517c66
MD5 hash: 4cd290cac6d9c4e1de99add6781965ad
MIME type:application/x-dosexec
Signature Formbook
File name:32512
File size:20 bytes
SHA256 hash: 708ccd35aa6974725eb818030184589ca140fb1d590e53b5e0371dc5cd9c4f2f
MD5 hash: 801052da35cdf74921ae5c2d928075d3
MIME type:application/octet-stream
Signature Formbook
Vendor Threat Intelligence
Verdict:
Malicious
Score:
92.5%
Link:
https://cyber-fortress.com/docs/result/index.php?id=6900a0119942f1282ec99e19
Tags:
spawn shell sage
Verdict:
Malicious
Threat level:
  10/10
Confidence:
100%
Tags:
expired-cert formbook invalid-signature krypt packed signed unsafe vbnet
Link:
https://www.filescan.io/uploads/6900a01bfd2d7e012f4e43d0/reports/b383ba7d-2404-4ef3-9391-b4bc884440e8/overview
Verdict:
Suspicious
Labled as:
Mal/RarMal
Link:
https://www.hybrid-analysis.com/sample/543b79100c980122ce6bfa54b78765da0089ff34b33ca6cf5e9ecdc7ba5e43b2
Verdict:
Malicious
File Type:
rar
First seen:
2025-10-28T05:33:00Z UTC
Last seen:
2025-10-30T08:31:00Z UTC
Hits:
~100
Link:
https://opentip.kaspersky.com/543b79100c980122ce6bfa54b78765da0089ff34b33ca6cf5e9ecdc7ba5e43b2/results?tab=lookup
Verdict:
inconclusive
YARA:
1 match(es)
Tags:
.Net Executable Managed .NET PDB Path PE (Portable Executable) PE File Layout Rar Archive SOS: 0.18
Link:
https://app.malva.re/file/1a09938f23fe83b135ba3b157912b2aa
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/543b79100c980122ce6bfa54b78765da0089ff34b33ca6cf5e9ecdc7ba5e43b2/
Threat name:
Win32.Packed.Generic
Create hunting rule
Status:
Suspicious
First seen:
2025-10-28 10:51:48 UTC
File Type:
Binary (Archive)
Extracted files:
7
AV detection:
15 of 24 (62.50%)
Threat level:
  1/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=kq5xseamtaasfttl7jklpb3f3iait7zuwm6knt26t3g4pos6ioza._file
Result
Malware family:
formbook
Create hunting rule
Score:
  10/10
Tags:
family:formbook discovery execution rat spyware stealer trojan
Link:
https://tria.ge/reports/251028-thpjqaht4e/
Behaviour
Suspicious behavior: EnumeratesProcesses
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
Enumerates physical storage devices
System Location Discovery: System Language Discovery
Suspicious use of SetThreadContext
Checks computer location settings
Command and Scripting Interpreter: PowerShell
Formbook payload
Formbook
Formbook family
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Legit
Score:
0.00
Link:
https://yomi.yoroi.company/submissions/543b79100c980122ce6bfa54b78765da0089ff34b33ca6cf5e9ecdc7ba5e43b2

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:INDICATOR_KB_CERT_7c1118cbbadc95da3752c46e47a27438
Create hunting rule
Author:ditekSHen
Description:Detects executables signed with stolen, revoked or invalid certificates
Rule name:NET
Create hunting rule
Author:malware-lu
Rule name:NETexecutableMicrosoft
Create hunting rule
Author:malware-lu
Rule name:PE_Digital_Certificate
Create hunting rule
Author:albertzsigovits
Rule name:pe_imphash
Create hunting rule
Rule name:Skystars_Malware_Imphash
Create hunting rule
Author:Skystars LightDefender
Description:imphash
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

rar 543b79100c980122ce6bfa54b78765da0089ff34b33ca6cf5e9ecdc7ba5e43b2

(this sample)

Formbook

Executable exe d374091cdaf72ea9673f8e9d63eebaefc9315a3511f0194dda15252ebb517c66

  
Delivery method
Distributed via e-mail attachment
  
Dropping
SHA256 d374091cdaf72ea9673f8e9d63eebaefc9315a3511f0194dda15252ebb517c66
  
Dropping
MD5 4cd290cac6d9c4e1de99add6781965ad
  
Dropping
Formbook

Comments