MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 a3281f249fefa89656285d226b142431579747f5262bdce6e3a694dba572c52c. 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 19 File information Comments

SHA256 hash:	a3281f249fefa89656285d226b142431579747f5262bdce6e3a694dba572c52c
SHA3-384 hash:	df4fe0bb725a76786dafd07b25151b4cd4c2c64c66d980a3d9a6145b06feb6f8b1e275d4762966ccc1cf5cd3a2e13b68
SHA1 hash:	c4c96a9f12530194345e8cd9804e1397ace583e7
MD5 hash:	4cd450122c4d81309cf12c045f28a79a
humanhash:	zebra-johnny-finch-don
File name:	PO200925-10456-BE-2025-001098-AEG-09-2025_pdf.exe
Download:	download sample
Signature	Formbook Create hunting rule
File size:	1'236'480 bytes
First seen:	2025-09-02 05:47:42 UTC
Last seen:	Never
File type:	exe
MIME type:	application/x-dosexec
imphash	1895460fffad9475fda0c84755ecfee1 (307 x Formbook, 52 x AgentTesla, 36 x SnakeKeylogger)
ssdeep	24576:Y5EmXFtKaL4/oFe5T9yyXYfP1ijXdasI0sKXlwt0IO4NJ:YPVt/LZeJbInQRasJhlI
Threatray	666 similar samples on MalwareBazaar
TLSH	T18745BF027391C062FF9BA5338F56F6115AFC69260123A61F13981EB9FE701B1563E7A3
TrID	40.3% (.EXE) Win64 Executable (generic) (10522/11/4) 19.3% (.EXE) Win16 NE executable (generic) (5038/12/1) 17.2% (.EXE) Win32 Executable (generic) (4504/4/1) 7.7% (.EXE) OS/2 Executable (generic) (2029/13) 7.6% (.EXE) Generic Win/DOS Executable (2002/3)
Magika	pebin
Reporter	lowmal3
Tags:	exe FormBook

Intelligence

File Origin

# of uploads :

# of downloads :

Origin country :

Vendor Threat Intelligence

Malware family:

n/a

ID:

File name:

PO200925-10456-BE-2025-001098-AEG-09-2025_pdf.exe

Verdict:

No threats detected

Analysis date:

2025-09-02 05:51:18 UTC

Tags:

n/a

Link:

https://app.any.run/tasks/b8b49128-206d-47e6-b231-eb27d3bd3e8e

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/24653/

Verdict:

Malicious

Score:

91.7%

Link:

https://cyber-fortress.com/docs/result/index.php?id=68b6852e3e988eb6ab8390ff

Tags:

underscore autoit emotet

Result

Verdict:

Malware

Maliciousness:

Behaviour

Creating a window

Creating a file in the %temp% directory

Launching a process

Сreating synchronization primitives

Unauthorized injection to a system process

Verdict:

Malicious

Labled as:

Win/malicious_confidence_90%

Link:

https://www.hybrid-analysis.com/sample/a3281f249fefa89656285d226b142431579747f5262bdce6e3a694dba572c52c

Verdict:

Malicious

File Type:

exe x32

First seen:

2025-09-01T09:26:00Z UTC

Last seen:

2025-09-01T09:26:00Z UTC

Hits:

~10

Detections:

Trojan.Win32.Strab.sb Trojan.Win32.Inject.sb HEUR:Trojan.Script.AUO.gen PDM:Trojan.Win32.Generic Trojan-Spy.Win32.Noon.sb

Link:

https://opentip.kaspersky.com/a3281f249fefa89656285d226b142431579747f5262bdce6e3a694dba572c52c/results?tab=lookup

Verdict:

Malicious

Link:

https://analyze.intezer.com/analyses/c2a7d95b-bae5-4e58-bb75-d25386827b60

Result

Threat name:

FormBook

Detection:

malicious

Classification:

troj.spyw.evad

Score:

100 / 100

Link:

https://www.joesandbox.com/analysis/1769253

Signature

Binary is likely a compiled AutoIt script file

Initial sample is a PE file and has a suspicious name

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)

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)

Writes to foreign memory regions

Yara detected FormBook

Behaviour

Behavior Graph:

Download SVG

Score:

100%

Verdict:

Malware

File Type:

Link:

https://malprob.io/report/a3281f249fefa89656285d226b142431579747f5262bdce6e3a694dba572c52c

Verdict:

Malware

YARA:

7 match(es)

Tags:

AutoIt Decompiled Executable PDB Path PE (Portable Executable) PE File Layout Suspect Win 32 Exe x86

Link:

https://app.malva.re/file/4cd450122c4d81309cf12c045f28a79a

Detection:

n/a

Link:

https://mwdb.cert.pl/sample/a3281f249fefa89656285d226b142431579747f5262bdce6e3a694dba572c52c/

Verdict:

Malicious

Threat:

Family.FORMBOOK

Link:

https://tip.neiki.dev/file/a3281f249fefa89656285d226b142431579747f5262bdce6e3a694dba572c52c

Threat name:

Win32.Trojan.AutoitInject

Status:

Malicious

First seen:

2025-09-01 16:12:19 UTC

File Type:

PE (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=umub6je756ujmvrilurgwfbegflzor7veyv5zzxdu2knxjlsyuwa._file

Verdict:

malicious

Label(s):

formbook

Result

Malware family:

formbook

Score:

10/10

Tags:

family:formbook discovery rat spyware stealer trojan

Link:

https://tria.ge/reports/250902-ghqqkaxjy2/

Behaviour

Suspicious behavior: EnumeratesProcesses

Suspicious behavior: MapViewOfSection

Suspicious use of FindShellTrayWindow

Suspicious use of SendNotifyMessage

Suspicious use of WriteProcessMemory

Program crash

System Location Discovery: System Language Discovery

Suspicious use of SetThreadContext

Formbook payload

Formbook

Formbook family

Verdict:

Suspicious

Tags:

n/a

YARA:

n/a

Link:

https://app.threat.zone/submission/92654919-59bb-4bd5-a0fd-eb9a3d50b4c9

Unpacked files

SH256 hash:

b42c23509985b9e2c772c666fe9e7d4181756c2103049608468e049ea9c9ed43

MD5 hash:

2456fafd83c9670be71f59aca26bff45

SHA1 hash:

60efdd72ca64791498a50aaf65aeab174b7fc81c

Link:

https://www.unpac.me/results/1c5fb403-4e0d-48d5-8425-d7fa858ae96f/

SH256 hash:

4a7d237b7a3de635ca4354226fb7186a8be34ae1122338bd919556a7b64d0519

MD5 hash:

0dc2e9937a2b10bdf67b01996ffa2277

SHA1 hash:

c52468e5475c45912b33bf64f851cffb74482c9a

Detections:

win_formbook_g0

Link:

https://www.unpac.me/results/1c5fb403-4e0d-48d5-8425-d7fa858ae96f/

Parent samples :

9b2eb9d576fe50d926b7e9cf66c96214efbb6d2049701a405fa955ba71542849
67ff4e6ff4f43b57e0acf7cefcf87af68c19c8e93375c031d4c1c2b37681647d
a3281f249fefa89656285d226b142431579747f5262bdce6e3a694dba572c52c
9fcfec763129f1daf2f146c0ce7e068a5d1da06da0cbda5775f308e40767c7d4
5daab7828742fd6296856266b3e2dccb5e5f8512ffe0fb86f4165cecd95f9dce
a6d8fac7f3f48a2f72f9fa463fcff72637903c6addbfbc58585586f65ae08422

SH256 hash:

a3281f249fefa89656285d226b142431579747f5262bdce6e3a694dba572c52c

MD5 hash:

4cd450122c4d81309cf12c045f28a79a

SHA1 hash:

c4c96a9f12530194345e8cd9804e1397ace583e7

Link:

https://www.unpac.me/results/1c5fb403-4e0d-48d5-8425-d7fa858ae96f/

Malware family:

FormBook

Verdict:

Malicious

Link:

https://www.vmray.com/analyses/_mb/a3281f249fef/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/a3281f249fefa89656285d226b142431579747f5262bdce6e3a694dba572c52c

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:	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)

File information

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

Malspam

Formbook

exe a3281f249fefa89656285d226b142431579747f5262bdce6e3a694dba572c52c

(this sample)

Delivery method

Distributed via e-mail attachment

Cape

https://www.capesandbox.com/analysis/24653/

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