MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 4c539de66c7826f9bc395602b928542c9ec2d49eb6eb7f61fe708c35e08a6012. 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: 9

Intelligence 9 IOCs YARA 23 File information Comments

SHA256 hash:	4c539de66c7826f9bc395602b928542c9ec2d49eb6eb7f61fe708c35e08a6012
SHA3-384 hash:	191bb9b1e675a1a2ebb861f34c6a6abff39ee920233c35403985ab1bb7724144440f31d87645cce20350c2364fa525ea
SHA1 hash:	5688afec10c2f6195bb847b795c6d883e3c98cda
MD5 hash:	6eaca06e34eb5850a61e869e5f28f3c0
humanhash:	pip-east-golf-dakota
File name:	original shipping documents.pdf.7z
Download:	download sample
Signature	Formbook Create hunting rule
File size:	712'575 bytes
First seen:	2025-08-25 07:44:39 UTC
Last seen:	Never
File type:	7z
MIME type:	application/x-rar
ssdeep	12288:LPrDWi6Xa5kZK3Z1d/Cy67ZvauTKEYBmmnowgZ28lZ3E8eItLBXCM:D+i6aqZK9ay6l1iLnoPJE8eoFyM
TLSH	T11BE433ACCA144028E918B15FCC68D60F722576951FA7ABA680134EC32B5D9E4CE76FF4
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:	7z FormBook Shipping

cocaman

Malicious email (T1566.001)
From: "=?UTF-8?B?RVJLQU4gw5ZaREVO?= <erkanozdn@gmail.com>" (likely spoofed)
Received: "from gmail.com (unknown [185.222.57.67]) "
Date: "24 Aug 2025 23:12:42 -0700"
Subject: "RE: original shipping documents "
Attachment: "original shipping documents.pdf.7z"

Intelligence

File Origin

# of uploads :

# of downloads :

Origin country :

File Archive Information

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

File name:	original shipping documents.pdf.exe
File size:	1'240'576 bytes
SHA256 hash:	b3519529f6d34d7fa3108901fe68b12f4577de4e610433e1ae733666fd8f1126
MD5 hash:	76f13ced9abe39f3dcd3056fd4acf5a3
MIME type:	application/x-dosexec
Signature	Formbook

Vendor Threat Intelligence

Detection(s):

Sanesecurity.Malware.28929.RarHeur.UNOFFICIAL

Verdict:

Malicious

Score:

91.7%

Link:

https://cyber-fortress.com/docs/result/index.php?id=68ac066c6eed937d746da5ad

Tags:

autoit emotet

Result

Verdict:

Malicious

File Type:

PE File

Link:

https://app.docguard.net/4c539de66c7826f9bc395602b928542c9ec2d49eb6eb7f61fe708c35e08a6012/results/dashboard

Behaviour

BlacklistAPI detected

Verdict:

Likely Malicious

Threat level:

7.5/10

Confidence:

100%

Tags:

adaptive-context anti-debug autoit compiled-script fingerprint keylogger lolbin masquerade microsoft_visual_cc packed reg threat

Link:

https://www.filescan.io/uploads/68ac14ba7137d684583af9e5/reports/4519ef5b-0549-4132-8c4b-25d73e51a17b/overview

Verdict:

Malicious

Labled as:

Trojan.Generic

Link:

https://www.hybrid-analysis.com/sample/4c539de66c7826f9bc395602b928542c9ec2d49eb6eb7f61fe708c35e08a6012

Verdict:

Malicious

File Type:

rar

First seen:

2025-08-25T02:54:00Z UTC

Last seen:

2025-08-25T02:54:00Z UTC

Hits:

~100

Link:

https://opentip.kaspersky.com/4c539de66c7826f9bc395602b928542c9ec2d49eb6eb7f61fe708c35e08a6012/results?tab=lookup

Gathering data

Detection:

n/a

Link:

https://mwdb.cert.pl/sample/4c539de66c7826f9bc395602b928542c9ec2d49eb6eb7f61fe708c35e08a6012/

Threat name:

Win32.Trojan.AutoitInject

Status:

Malicious

First seen:

2025-08-25 07:44:42 UTC

File Type:

Binary (Archive)

Extracted files:

AV detection:

25 of 38 (65.79%)

Threat level:

5/5

Detection(s):

Suspicious file

Link:

https://check.spamhaus.org/check/?searchterm=jrjz3ztmpatptpbzkyblskcufspmfve6w3vx6yp6ocgdlyekmaja._file

Result

Malware family:

formbook

Score:

10/10

Tags:

family:formbook discovery rat spyware stealer trojan

Link:

https://tria.ge/reports/250825-mn9nhsep4z/

Behaviour

Suspicious behavior: EnumeratesProcesses

Suspicious behavior: MapViewOfSection

Suspicious use of FindShellTrayWindow

Suspicious use of SendNotifyMessage

Suspicious use of WriteProcessMemory

System Location Discovery: System Language Discovery

System Network Configuration Discovery: Internet Connection Discovery

Suspicious use of SetThreadContext

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/4c539de66c7826f9bc395602b928542c9ec2d49eb6eb7f61fe708c35e08a6012

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:	AutoIT_Compiled Create hunting rule
Author:	@bartblaze
Description:	Identifies compiled AutoIT script (as EXE). This rule by itself does NOT necessarily mean the detected file is malicious.

Rule name:	CP_AllMal_Detector Create hunting rule
Author:	DiegoAnalytics
Description:	CrossPlatform All Malwares Detector: Detect PE, ELF, Mach-O, scripts, archives; overlay, obfuscation, encryption, spoofing, hiding, high entropy, network communication

Rule name:	CP_Script_Inject_Detector Create hunting rule
Author:	DiegoAnalytics
Description:	Detects attempts to inject code into another process across PE, ELF, Mach-O binaries

Rule name:	DebuggerCheck__API Create hunting rule
Reference:	https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara

Rule name:	DebuggerCheck__GlobalFlags Create hunting rule
Reference:	https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara

Rule name:	DebuggerCheck__QueryInfo Create hunting rule
Reference:	https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara

Rule name:	DebuggerHiding__Active Create hunting rule
Reference:	https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara

Rule name:	DebuggerHiding__Thread Create hunting rule
Reference:	https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara

Rule name:	DetectEncryptedVariants Create hunting rule
Author:	Zinyth
Description:	Detects 'encrypted' in ASCII, Unicode, base64, or hex-encoded

Rule name:	dgaagas Create hunting rule
Author:	Harshit
Description:	Uses certutil.exe to download a file named test.txt

Rule name:	golang_bin_JCorn_CSC846 Create hunting rule
Author:	Justin Cornwell
Description:	CSC-846 Golang detection ruleset

Rule name:	MD5_Constants Create hunting rule
Author:	phoul (@phoul)
Description:	Look for MD5 constants

Rule name:	pe_detect_tls_callbacks Create hunting rule

Rule name:	pe_no_import_table Create hunting rule
Description:	Detect pe file that no import table

Rule name:	RIPEMD160_Constants Create hunting rule
Author:	phoul (@phoul)
Description:	Look for RIPEMD-160 constants

Rule name:	SEH__vectored Create hunting rule
Reference:	https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara

Rule name:	SHA1_Constants Create hunting rule
Author:	phoul (@phoul)
Description:	Look for SHA1 constants

Rule name:	shellcode Create hunting rule
Author:	nex
Description:	Matched shellcode byte patterns

Rule name:	SUSP_RAR_with_PDF_Script_Obfuscation Create hunting rule
Author:	Florian Roth (Nextron Systems)
Description:	Detects RAR file with suspicious .pdf extension prefix to trick users
Reference:	Internal Research

Rule name:	SUSP_RAR_with_PDF_Script_Obfuscation_RID34A4 Create hunting rule
Author:	Florian Roth
Description:	Detects RAR file with suspicious .pdf extension prefix to trick users
Reference:	Internal Research

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)