MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 4c3c4e06e9994eded388727f5744c0746b76cb66f49efc0113111c7e6f975802. 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: 15

Intelligence 15 IOCs YARA 19 File information Comments

SHA256 hash:	4c3c4e06e9994eded388727f5744c0746b76cb66f49efc0113111c7e6f975802
SHA3-384 hash:	87ff3a466f70830be8ffec976040c11a383ae7a5d9ec2b3e98246e2893718671421a0472cebf07bc304e8b2b881e8511
SHA1 hash:	de348334e29485376b4e0f5487faf00184c51349
MD5 hash:	e35bf4bd8ed78626b63cb917fb2fd576
humanhash:	table-washington-coffee-seven
File name:	Inquiry.exe
Download:	download sample
Signature	Formbook Create hunting rule
File size:	1'268'736 bytes
First seen:	2026-08-25 06:07:01 UTC
Last seen:	2026-09-10 11:01:34 UTC
File type:	exe
MIME type:	application/x-dosexec
imphash	f34d5f2d4577ed6d9ceec516c1f5a744 (49'245 x AgentTesla, 20'500 x Formbook, 12'374 x SnakeKeylogger)
ssdeep	24576:/klFxzjP/2oSdv/ynygaK1aQmzFtPdYfTWcv4u2QXMixvMFky4Eip:SNb/2oSQnyzDzFtPdqTWcAuNZxvMGy
TLSH	T1A145AD583211EC9EC4928971C9E0DDFAA6302CA7D616E20395E73D9FB93D586EF101E3
TrID	73.9% (.EXE) Generic CIL Executable (.NET, Mono, etc.) (73123/4/13) 6.6% (.DLL) Win32 Dynamic Link Library (generic) (6578/25/2) 6.6% (.EXE) Win64 Executable (generic) (6522/11/2) 4.5% (.EXE) Win32 Executable (generic) (4504/4/1) 2.0% (.ICL) Windows Icons Library (generic) (2059/9)
Magika	pebin
Reporter	lowmal3
Tags:	exe FormBook

Intelligence

File Origin

# of uploads :

# of downloads :

195

Origin country :

Vendor Threat Intelligence

Malware configuration found for:

RoboSki

Details

Link:

https://research.acce.ciphertechsolutions.com/results/a86f9bd0-79b7-42d9-a3b6-d1c5c3a6b21c/

Detection:

Formbook

Link:

https://www.capesandbox.com/analysis/82686/

Result

Verdict:

Malware

Maliciousness:

Behaviour

Creating a window

Creating a process with a hidden window

Unauthorized injection to a recently created process

Restart of the analyzed sample

Creating a file

Сreating synchronization primitives

Adding an exclusion to Microsoft Defender

Verdict:

Malicious

Labled as:

Win/malicious_confidence_100%

Link:

https://www.hybrid-analysis.com/sample/4c3c4e06e9994eded388727f5744c0746b76cb66f49efc0113111c7e6f975802

Verdict:

Malicious

File Type:

exe x32

First seen:

2026-08-24T14:07:00Z UTC

Last seen:

2026-08-27T02:17:00Z UTC

Hits:

~1000

Link:

https://opentip.kaspersky.com/4c3c4e06e9994eded388727f5744c0746b76cb66f49efc0113111c7e6f975802/results?tab=lookup

Malware family:

Formbook

Verdict:

Malicious

Link:

https://analyze.intezer.com/analyses/44d1b678-8f5d-47e1-825f-6be705ddf3fe

Result

Threat name:

FormBook

Detection:

malicious

Classification:

troj.spyw.evad

Score:

100 / 100

Link:

https://www.joesandbox.com/analysis/1963162

Signature

.NET source code contains method to dynamically call methods (often used by packers)

Adds a directory exclusion to Windows Defender

Found direct / indirect Syscall (likely to bypass EDR)

Injects a PE file into a foreign processes

Joe Sandbox ML detected suspicious sample

Loading BitLocker PowerShell Module

Maps a DLL or memory area into another process

Modifies the context of a thread in another process (thread injection)

Multi AV Scanner detection for submitted file

Queues an APC in another process (thread injection)

Sigma detected: Powershell Base64 Encoded MpPreference Cmdlet

Suricata IDS alerts for network traffic

Switches to a custom stack to bypass stack traces

Tries to harvest and steal browser information (history, passwords, etc)

Tries to steal Mail credentials (via file / registry access)

Unusual module load detection (module proxying)

Yara detected AntiVM3

Yara detected FormBook

Yara detected MSIL Injector

Behaviour

Behavior Graph:

Download SVG

Score:

100%

Verdict:

Malware

File Type:

Link:

https://malprob.io/report/4c3c4e06e9994eded388727f5744c0746b76cb66f49efc0113111c7e6f975802

Verdict:

inconclusive

YARA:

12 match(es)

Tags:

.Net Executable Managed .NET PE (Portable Executable) PE File Layout SOS: 0.83 Win 32 Exe x86

Link:

https://app.malva.re/file/e35bf4bd8ed78626b63cb917fb2fd576

Detection:

n/a

Link:

https://mwdb.cert.pl/sample/4c3c4e06e9994eded388727f5744c0746b76cb66f49efc0113111c7e6f975802/

Threat name:

Win32.Backdoor.FormBook

Status:

Malicious

First seen:

2026-08-24 17:22:11 UTC

File Type:

PE (.Net Exe)

Extracted files:

AV detection:

19 of 24 (79.17%)

Threat level:

5/5

Detection(s):

Suspicious file

Link:

https://check.spamhaus.org/check/?searchterm=jq6e4bxjtfhn5u4ioj7vorgaorvxns3g6sppyaitceoh434xlaba._file

Verdict:

malicious

Label(s):

Formbook

Link:

https://reports.threatray.com/a3b31d8a-eea0-4865-9594-dcc699d19e01

Result

Malware family:

formbook

Score:

10/10

Tags:

family:formbook discovery execution rat spyware stealer trojan

Link:

https://tria.ge/reports/260825-gveh3attbx/

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

Family: Formbook

Formbook payload

Unpacked files

SH256 hash:

4c3c4e06e9994eded388727f5744c0746b76cb66f49efc0113111c7e6f975802

MD5 hash:

e35bf4bd8ed78626b63cb917fb2fd576

SHA1 hash:

de348334e29485376b4e0f5487faf00184c51349

Link:

https://www.unpac.me/results/d6c6e257-dbf3-44ff-8457-5533260ec048/

SH256 hash:

99181239c3cee54aa84a36a620a87e5941aa1fc5331d76310b71f8585caf6a0a

MD5 hash:

e6ebda1a4348fca679fe8656924f6666

SHA1 hash:

0036660cf84f688f2d39ad19728f61157a702d83

Link:

https://www.unpac.me/results/d6c6e257-dbf3-44ff-8457-5533260ec048/

SH256 hash:

e830161d1871c96116eedd17bae66606d1274b0cefa6ef21bec38f5253ac21e8

MD5 hash:

c03db62ee34e3db2f2d2060c7a5681a9

SHA1 hash:

920951fc174cb0e39e14e38992daa52fff85c7da

Detections:

SUSP_OBF_NET_ConfuserEx_Name_Pattern_Jan24

Link:

https://www.unpac.me/results/d6c6e257-dbf3-44ff-8457-5533260ec048/

SH256 hash:

2bf01c5b04d52f23c1086ce354e6998e4797c9dd5a6ebf11bee83b608f923c39

MD5 hash:

3128a457366233c6f27cff8536281b25

SHA1 hash:

401df853b40e86150c9d17d0edb4002cd34573d6

Link:

https://www.unpac.me/results/d6c6e257-dbf3-44ff-8457-5533260ec048/

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/4c3c4e06e9994eded388727f5744c0746b76cb66f49efc0113111c7e6f975802

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:	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__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:	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:	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:	Skystars_Malware_Imphash Create hunting rule
Author:	Skystars LightDefender
Description:	imphash

Rule name:	TH_Win_ETW_Bypass_2025_CYFARE Create hunting rule
Author:	CYFARE
Description:	Windows ETW Bypass Detection Rule - 2025
Reference:	https://cyfare.net/

File information

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

Cape

https://www.capesandbox.com/analysis/82686/

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