MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 a4cb4c76933ac72570a90a7bb73c6dc6cdc791db10697aa10bf70dec8835e53c. 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: 18

Intelligence 18 IOCs YARA 17 File information Comments

SHA256 hash:	a4cb4c76933ac72570a90a7bb73c6dc6cdc791db10697aa10bf70dec8835e53c
SHA3-384 hash:	971e10c4d5e7b9c9f66715f0331b17c2c4b0a0300ac92ac45f7c9b603334c59b65c32c0e2c11b00496f6191211472e59
SHA1 hash:	95b1dbfeda102a89d293c0ea4328bd015580fa63
MD5 hash:	327cec065e5d3e063f6cd67a503ec72b
humanhash:	california-mexico-twelve-lima
File name:	Ant50068.exe
Download:	download sample
Signature	Formbook Create hunting rule
File size:	1'250'304 bytes
First seen:	2026-05-21 14:35:12 UTC
Last seen:	Never
File type:	exe
MIME type:	application/x-dosexec
imphash	279daa640d9140f9842860a738abd363 (40 x Formbook, 8 x AgentTesla, 2 x CastleLoader)
ssdeep	24576:IqDEvCTbMWu7rQYlBQcBiT6rprG8arwRKp+skRZsO/D1WOIS9c:ITvC/MTQYxsWR7arwRKpURPJWby
Threatray	5'174 similar samples on MalwareBazaar
TLSH	T1EF45CF027391D062FFAB92334B5AF6115BBC79260123E61F13981D79BE701B2563E7A3
TrID	29.5% (.EXE) Win64 Executable (generic) (6522/11/2) 22.8% (.EXE) Win16 NE executable (generic) (5038/12/1) 20.3% (.EXE) Win32 Executable (generic) (4504/4/1) 9.1% (.EXE) OS/2 Executable (generic) (2029/13) 9.0% (.EXE) Generic Win/DOS Executable (2002/3)
Magika	pebin
File icon (PE):
dhash icon	aae2f3e38383b629 (2'697 x Formbook, 1'203 x CredentialFlusher, 928 x AgentTesla)
Reporter	TomU
Tags:	exe FormBook

Intelligence

File Origin

# of uploads :

# of downloads :

Origin country :

Vendor Threat Intelligence

Malware configuration found for:

AutoIt AutoStones FormBook

Details

AutoIt

extracted scripts and files

AutoStones

the names of side-loaded components and, if available from processing of a parent file, the deobfuscated components

FormBook

a decrypted component and its RC4 key

Link:

https://research.acce.ciphertechsolutions.com/results/8995e45b-ae64-46b7-8a39-93f95396293c/

Malware family:

n/a

ID:

File name:

Ant50068.exe

Verdict:

No threats detected

Analysis date:

2026-05-21 14:39:31 UTC

Tags:

n/a

Link:

https://app.any.run/tasks/ba4c79e4-d0f4-455d-9814-fa1f7048e3d1

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/67371/

Detection(s):

SecuriteInfo.com.Trojan.Generic.33203615.28472.17882.UNOFFICIAL

Verdict:

Malicious

Score:

99.1%

Link:

https://cyber-fortress.com/docs/result/index.php?id=6a0f192198070a72bb9c6a57

Tags:

autoit emotet

Result

Verdict:

Malware

Maliciousness:

Behaviour

Creating a window

Creating a file in the %temp% directory

Launching a process

Searching for synchronization primitives

Launching the default Windows debugger (dwwin.exe)

Sending a custom TCP request

Unauthorized injection to a system process

Verdict:

Likely Malicious

Threat level:

7.5/10

Confidence:

100%

Tags:

adaptive-context anti-debug autoit compiled-script fingerprint keylogger microsoft_visual_cc packed reconnaissance

Link:

https://www.filescan.io/uploads/6a0f2215efbd399b39c3aee2/reports/395ecd95-e6ca-49e9-9893-16f333d99a73/overview

Verdict:

Malicious

Labled as:

Trojan.Generic

Link:

https://www.hybrid-analysis.com/sample/a4cb4c76933ac72570a90a7bb73c6dc6cdc791db10697aa10bf70dec8835e53c

Verdict:

Malicious

File Type:

exe x32

First seen:

2024-09-02T01:44:00Z UTC

Last seen:

2025-07-29T22:05:00Z UTC

Hits:

~100

Detections:

Trojan.Win32.Strab.osy Trojan.Win32.Agent.sb PDM:Trojan.Win32.Generic Trojan.Win32.Zenpak.sb Trojan.Win32.Strab.sb Trojan.Win32.Auzenpak.sb HEUR:Trojan.Win32.Obfus.gen Trojan-Dropper.Win32.Dorifel.sbd Trojan.Win32.Inject.sb Trojan-Spy.Win32.Noon.sb HEUR:Trojan.Script.AUO.gen

Link:

https://opentip.kaspersky.com/a4cb4c76933ac72570a90a7bb73c6dc6cdc791db10697aa10bf70dec8835e53c/results?tab=lookup

Malware family:

Formbook

Verdict:

Malicious

Link:

https://analyze.intezer.com/analyses/3e0f347b-bdad-479e-8e1f-f48c7230bd83

Score:

100%

Verdict:

Malware

File Type:

Link:

https://malprob.io/report/a4cb4c76933ac72570a90a7bb73c6dc6cdc791db10697aa10bf70dec8835e53c

Gathering data

Detection:

n/a

Link:

https://mwdb.cert.pl/sample/a4cb4c76933ac72570a90a7bb73c6dc6cdc791db10697aa10bf70dec8835e53c/

Verdict:

Malicious

Threat:

Family.FORMBOOK

Link:

https://tip.neiki.dev/file/a4cb4c76933ac72570a90a7bb73c6dc6cdc791db10697aa10bf70dec8835e53c

Threat name:

Win32.Trojan.AutoitInject

Status:

Malicious

First seen:

2024-09-03 02:36:00 UTC

File Type:

PE (Exe)

Extracted files:

AV detection:

27 of 36 (75.00%)

Threat level:

5/5

Detection(s):

Suspicious file

Link:

https://check.spamhaus.org/check/?searchterm=utfuy5uthldsk4fjbj53opdny3g4peo3cbuxviil64g6zcbv4u6a._file

Verdict:

malicious

Label(s):

formbook

unc_loader_036

Formbook

575f2b722f29849a626fa358ead91b7d6c47218f4a4bd8cdd3698c4492112bcb

Formbook

78b3f8f461aaa1a44a997c5a6b7dbac7b183461c53632449562c18ccb1683e3d

Formbook

84b2ff40ad4d730d159263cbd17c600c76955c74ef082dba4f47d0de9fd33a2a

Formbook

a1eda5ab0df7fddc1257ae31ab489b352f5a19a60d14772d4745f3fe14b5d4a5

Formbook

abee0ea0d7ce5d8bbcb23a667be7355835f1faa9400338553922fa5cf76e874b

Formbook

b46420c24a371b5b05317ec59c65e7c7d6fdbfb772460f8f812810d7871da039

Formbook

ddbfbc45ef066cddbcf28645c981047d86850832f1b404384d7503935f5371b1

Formbook

e0d1b9846263ae7b76a17d1923c851ee955b1293c4009605f0546dab279cce91

Formbook

e7413d14be16f0ef9d69ab606b79523851edce48ddb94d335388f6ef10bb6388

Formbook

+ 5'164 additional samples on MalwareBazaar

Result

Malware family:

formbook

Score:

10/10

Tags:

family:formbook discovery rat spyware stealer trojan

Link:

https://tria.ge/reports/260521-ry17cafw9k/

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

Suspicious use of SetThreadContext

Family: Formbook

Formbook payload

Unpacked files

SH256 hash:

a4cb4c76933ac72570a90a7bb73c6dc6cdc791db10697aa10bf70dec8835e53c

MD5 hash:

327cec065e5d3e063f6cd67a503ec72b

SHA1 hash:

95b1dbfeda102a89d293c0ea4328bd015580fa63

Link:

https://www.unpac.me/results/6e94b0a7-04e9-4562-910e-36b304cd8f3e/

SH256 hash:

83659ea0a2a415ca5254d07ceb1e243f3ecd1abf0962ec5851cf2393dd590292

MD5 hash:

723818970b5bf2b59cf8619844f5c710

SHA1 hash:

61159ead668719680b4eb16943bdf52d43ce624a

Link:

https://www.unpac.me/results/6e94b0a7-04e9-4562-910e-36b304cd8f3e/

SH256 hash:

64126a94af71f9b8530abef06c79705db171efa86dc78cd6fd0a855fa8440834

MD5 hash:

fca55a7c0005f525526e3cd6365248ee

SHA1 hash:

5c86791f970aba56c72731db7d5ca5cc6378a5b8

Detections:

win_formbook_g0

win_formbook_w0

triage_formbook

Link:

https://www.unpac.me/results/6e94b0a7-04e9-4562-910e-36b304cd8f3e/

Parent samples :

38acaa3b060f85cb00a20e9abf89d81a8f818c4352fc8bb6a4dd62559cd856c0
df39ab12647f0ee505aced832ba2a9cd612c12d8ce1deb9ef5b0f7eb566f52e8
2021d3f7d316ec0e2182e0fc7826bc832b12500ad02e3800aad779c543c26bc4
4a2eed7df2cb6a6ed9316de57d0491d57366e523d5054f81c3a9843f6fcc08f1
0758624d7eb7bf5d04a2644b5b9998b7dc3aa76a3ac8e786ad5ee38f9fdbfc0f
f6c16326c23363c4571c6312586429f49632cf265ac3d865857945100109944f
a4cb4c76933ac72570a90a7bb73c6dc6cdc791db10697aa10bf70dec8835e53c

Malware family:

FormBook

Verdict:

Malicious

Link:

https://www.vmray.com/analyses/_mb/a4cb4c76933a/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/a4cb4c76933ac72570a90a7bb73c6dc6cdc791db10697aa10bf70dec8835e53c

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_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:	Formbook Create hunting rule
Author:	kevoreilly
Description:	Formbook Payload

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

Rule name:	meth_stackstrings Create hunting rule
Author:	Willi Ballenthin

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:	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:	TH_AntiVM_MassHunt_Win_Malware_2026_CYFARE Create hunting rule
Author:	CYFARE
Description:	Detects Windows malware employing anti-VM / anti-sandbox evasion techniques across VMware, VirtualBox, Hyper-V, QEMU, Xen, and generic sandbox environments
Reference:	https://cyfare.net/

Rule name:	TH_Generic_MassHunt_Win_Malware_2025_CYFARE Create hunting rule
Author:	CYFARE
Description:	Generic Windows malware mass-hunt rule - 2025
Reference:	https://cyfare.net/

Rule name:	VECT_Ransomware Create hunting rule
Author:	Mustafa Bakhit
Description:	Detects activity associated with VECT ransomware. This includes registry modifications and deletions, execution of system and defense-evasion commands, suspicious API usage, mutex creation, file and memory manipulation, ransomware note generation, anti-debugging and anti-analysis techniques, and embedded cryptographic constants (SHA256) characteristic of this malware family. Designed for threat intelligence and malware detection environments.

Rule name:	Windows_Trojan_Formbook Create hunting rule
Author:	@malgamy12

Rule name:	Windows_Trojan_Formbook_1112e116 Create hunting rule
Author:	Elastic Security
Reference:	https://www.elastic.co/security-labs/formbook-adopts-cab-less-approach

Rule name:	win_formbook_w0 Create hunting rule
Author:	@malgamy12

File information

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

Malspam

Formbook

exe a4cb4c76933ac72570a90a7bb73c6dc6cdc791db10697aa10bf70dec8835e53c

(this sample)

Delivery method

Distributed via e-mail attachment

Cape

https://www.capesandbox.com/analysis/67371/

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