MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 21b4ae3cb4d48b4fc4e190698feac2eae85cfc81d8566406296c37a365d815e3. 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: 17

Intelligence 17 IOCs YARA 25 File information Comments

SHA256 hash:	21b4ae3cb4d48b4fc4e190698feac2eae85cfc81d8566406296c37a365d815e3
SHA3-384 hash:	ab6ff719121d51d0e640628d52a70abe9662e5bbd271a648058a669dcb93e6bffddb63a105d8b0dee1d1b9a132e0b9f6
SHA1 hash:	5b3d7ec0c20043cfc7bfe9d079cbe33ba67a840a
MD5 hash:	c0195215cac879d8ca06d0c60cddc422
humanhash:	oklahoma-monkey-charlie-nevada
File name:	teklif şartname-2.bat
Download:	download sample
Signature	Formbook Create hunting rule
File size:	817'664 bytes
First seen:	2026-09-28 06:48:56 UTC
Last seen:	Never
File type:	exe
MIME type:	application/x-dosexec
imphash	f34d5f2d4577ed6d9ceec516c1f5a744 (49'272 x AgentTesla, 20'614 x Formbook, 12'394 x SnakeKeylogger)
ssdeep	24576:XNZLgb27me4JWoAMjgz5FDlvSMN85Zch8WZg:XjLg84+UgZXN85c8Wm
TLSH	T1C50501A4321A8503D965A7F84A71F23457796DEAB512D3E38FDA2CEF74E2F518C00293
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
dhash icon	e8d4e8e4d4e8d4e8 (3 x Formbook, 1 x AsyncRAT)
Reporter	lowmal3
Tags:	exe FormBook

Intelligence

File Origin

# of uploads :

# of downloads :

224

Origin country :

Vendor Threat Intelligence

Malware configuration found for:

RoboSki

Details

Link:

https://research.acce.ciphertechsolutions.com/results/838fcfa2-9d4c-40f2-b046-540d53b0d526/

Malware family:

formbook

ID:

File name:

exe

Verdict:

Malicious activity

Analysis date:

2026-09-28 06:56:54 UTC

Tags:

formbook xloader

Link:

https://app.any.run/tasks/843d1ef5-d35f-40bc-889f-171b661ca9f5

Note:

ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample

Detection:

Formbook

Link:

https://www.capesandbox.com/analysis/89400/

Detection(s):

SecuriteInfo.com.Trojan.Inject7.3837.22327.27434.UNOFFICIAL

Verdict:

Malicious

Score:

94.1%

Link:

https://cyber-fortress.com/docs/result/index.php?id=6ac0b7a959bf6e2f9e92c41f

Tags:

virus shell micro

Result

Verdict:

Malware

Maliciousness:

Behaviour

Creating a window

Сreating synchronization primitives

Creating a process with a hidden window

Searching for synchronization primitives

Launching the default Windows debugger (dwwin.exe)

Adding an exclusion to Microsoft Defender

Verdict:

Likely Malicious

Threat level:

7.5/10

Confidence:

100%

Tags:

bitmap masquerade packed packed stego

Link:

https://www.filescan.io/uploads/6aba0de8b93516682ef29177/reports/a570af61-dc68-4193-8872-e38ce7119bdb/overview

Verdict:

Malicious

Labled as:

Win/malicious_confidence_100%

Link:

https://www.hybrid-analysis.com/sample/21b4ae3cb4d48b4fc4e190698feac2eae85cfc81d8566406296c37a365d815e3

Verdict:

Malicious

File Type:

exe x32

First seen:

2026-09-25T10:34:00Z UTC

Last seen:

2026-09-30T05:39:00Z UTC

Hits:

~100

Link:

https://opentip.kaspersky.com/21b4ae3cb4d48b4fc4e190698feac2eae85cfc81d8566406296c37a365d815e3/results?tab=lookup

Malware family:

Formbook

Verdict:

Malicious

Link:

https://analyze.intezer.com/analyses/9e9217e7-e13d-4d59-888c-9dea8be436f2

Result

Threat name:

FormBook

Detection:

malicious

Classification:

troj.spyw.evad

Score:

100 / 100

Link:

https://www.joesandbox.com/analysis/1978793

Signature

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

.NET source code contains potential unpacker

Adds a directory exclusion to Windows Defender

Found direct / indirect Syscall (likely to bypass EDR)

Joe Sandbox ML detected suspicious sample

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

Performs DNS queries to domains with low reputation

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

Behaviour

Behavior Graph:

Download SVG

Score:

100%

Verdict:

Malware

File Type:

Link:

https://malprob.io/report/21b4ae3cb4d48b4fc4e190698feac2eae85cfc81d8566406296c37a365d815e3

Verdict:

inconclusive

YARA:

5 match(es)

Tags:

.Net Executable Managed .NET PDB Path PE (Portable Executable) PE File Layout SOS: 0.27 Win 32 Exe x86

Link:

https://app.malva.re/file/c0195215cac879d8ca06d0c60cddc422

Detection:

n/a

Link:

https://mwdb.cert.pl/sample/21b4ae3cb4d48b4fc4e190698feac2eae85cfc81d8566406296c37a365d815e3/

Threat name:

Win32.Trojan.Jalapeno

Status:

Malicious

First seen:

2026-09-26 01:09:51 UTC

File Type:

PE (.Net Exe)

Extracted files:

AV detection:

22 of 36 (61.11%)

Threat level:

5/5

Detection(s):

Suspicious file

Link:

https://check.spamhaus.org/check/?searchterm=eg2k4pfu2sfu7rhbsbuy72wc5lufz7eb3blgibrjnq32gzoycxrq._file

Result

Malware family:

n/a

Score:

8/10

Tags:

discovery execution

Link:

https://tria.ge/reports/260928-hlfkfayxex/

Behaviour

Suspicious behavior: EnumeratesProcesses

Suspicious use of AdjustPrivilegeToken

Suspicious use of WriteProcessMemory

Enumerates physical storage devices

Program crash

System Location Discovery: System Language Discovery

Enumerates connected drives

Checks computer location settings

Command and Scripting Interpreter: PowerShell

Unpacked files

SH256 hash:

21b4ae3cb4d48b4fc4e190698feac2eae85cfc81d8566406296c37a365d815e3

MD5 hash:

c0195215cac879d8ca06d0c60cddc422

SHA1 hash:

5b3d7ec0c20043cfc7bfe9d079cbe33ba67a840a

Link:

https://www.unpac.me/results/b1ca734b-9495-4725-b6a9-205aa50e994c/

SH256 hash:

00357426f8fd924107d9ad78607ddbf796ec90af1bccddd3091b9ea0beaf1e75

MD5 hash:

551bf9ad72b8f5b0ecfeb086c127a608

SHA1 hash:

7006ab1b672df4dd7b8188cd56e3e1173af3e3e9

Link:

https://www.unpac.me/results/b1ca734b-9495-4725-b6a9-205aa50e994c/

SH256 hash:

ec7d41a0138dde410e28f86c6f8db439c2c1cd78291c298afb4d12fdf1a7edcf

MD5 hash:

4604721c507e1a2ec3b6fb5c961d9a24

SHA1 hash:

f76cf996b7a99611428ed02b2bfe459b9f81dd60

Link:

https://www.unpac.me/results/b1ca734b-9495-4725-b6a9-205aa50e994c/

SH256 hash:

e70349ca3bd5bdee84bd7d415e72d8c1e647a2b93594461fc5b97514671fd096

MD5 hash:

f48e1b44718d610277ea7bb63d89ed3e

SHA1 hash:

01a3292293e0f367baa61fbb6c778a6e174968e1

Link:

https://www.unpac.me/results/b1ca734b-9495-4725-b6a9-205aa50e994c/

Malware family:

FormBook

Verdict:

Malicious

Link:

https://www.vmray.com/analyses/_mb/21b4ae3cb4d4/report/overview.html

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/21b4ae3cb4d48b4fc4e190698feac2eae85cfc81d8566406296c37a365d815e3

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:	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/

Rule name:	WIN_Sample_Unique_69354b41 Create hunting rule
Author:	Marjoriefort
Description:	Specimen unique (soumission Bazaar) - strings distinctifs propres au sample
Reference:	69354b41e10daf03d3f3af881b32d5c0fec56b1cfe96629fd4c5263413a42854.exe

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/89400/

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