MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 03cf3b904fa5ab697555ec0c6ee3c0cb6bbb42a01876e2d093bd78edc4cbe3f0. 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: 14

Intelligence 14 IOCs YARA 19 File information Comments

SHA256 hash:	03cf3b904fa5ab697555ec0c6ee3c0cb6bbb42a01876e2d093bd78edc4cbe3f0
SHA3-384 hash:	d4a1fe8ea8c7f5f883b85c56a4c57d00a65c21ed9d2f74dd4030a714d34b1af92349d122b42160df1b822716ee629fa7
SHA1 hash:	315e57d682ad745b64db3a2de9daed1801f982bf
MD5 hash:	88aca4c9d81410e3f6df04aad1d8ec75
humanhash:	freddie-fish-jupiter-oregon
File name:	03cf3b904fa5ab697555ec0c6ee3c0cb6bbb42a01876e2d093bd78edc4cbe3f0
Download:	download sample
Signature	Formbook Create hunting rule
File size:	1'256'960 bytes
First seen:	2026-02-05 15:46:28 UTC
Last seen:	Never
File type:	exe
MIME type:	application/x-dosexec
imphash	1895460fffad9475fda0c84755ecfee1 (433 x Formbook, 126 x AgentTesla, 65 x a310Logger)
ssdeep	24576:85EmXFtKaL4/oFe5T9yyXYfP1ijXdaJZTrRhKwimOQ3X2YvE:8PVt/LZeJbInQRaJZTrDvimG
Threatray	4'286 similar samples on MalwareBazaar
TLSH	T19945BF0273D1D062FFAB95334F56F6115BBC79260123AA1F13981DBABA701B1463E7A3
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	adrian__luca
Tags:	exe FormBook

Intelligence

File Origin

# of uploads :

# of downloads :

103

Origin country :

Vendor Threat Intelligence

Malware configuration found for:

AutoIt

Details

AutoIt

extracted scripts and files

Link:

https://research.acce.ciphertechsolutions.com/results/08b72295-2778-4251-af0c-cd930c9ddddb/

Malware family:

n/a

ID:

File name:

03cf3b904fa5ab697555ec0c6ee3c0cb6bbb42a01876e2d093bd78edc4cbe3f0

Verdict:

No threats detected

Analysis date:

2026-02-05 22:11:33 UTC

Tags:

n/a

Link:

https://app.any.run/tasks/0b5234f3-7068-42bd-a3e4-e3543af3702c

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/52193/

Detection(s):

SecuriteInfo.com.Win32.Trojan.Agent.35E5V6.UNOFFICIAL

Verdict:

Malicious

Score:

99.1%

Link:

https://cyber-fortress.com/docs/result/index.php?id=6984bb74ae5379bb6609c9bb

Tags:

autoit emotet

Verdict:

Malicious

Labled as:

Win/malicious_confidence_100%

Link:

https://www.hybrid-analysis.com/sample/03cf3b904fa5ab697555ec0c6ee3c0cb6bbb42a01876e2d093bd78edc4cbe3f0

Verdict:

Malicious

File Type:

exe x32

First seen:

2026-01-26T22:28:00Z UTC

Last seen:

2026-02-06T17:22:00Z UTC

Hits:

~100

Link:

https://opentip.kaspersky.com/03cf3b904fa5ab697555ec0c6ee3c0cb6bbb42a01876e2d093bd78edc4cbe3f0/results?tab=lookup

Verdict:

Malicious

Link:

https://analyze.intezer.com/analyses/15d97a60-8b9c-41b5-b1db-a20bac55d9aa

Score:

100%

Verdict:

Malware

File Type:

Link:

https://malprob.io/report/03cf3b904fa5ab697555ec0c6ee3c0cb6bbb42a01876e2d093bd78edc4cbe3f0

Gathering data

Detection:

n/a

Link:

https://mwdb.cert.pl/sample/03cf3b904fa5ab697555ec0c6ee3c0cb6bbb42a01876e2d093bd78edc4cbe3f0/

Threat name:

Win32.Malware.Heuristic

Status:

Malicious

First seen:

2026-01-27 02:56:56 UTC

File Type:

PE (Exe)

Extracted files:

AV detection:

28 of 36 (77.78%)

Threat level:

2/5

Detection(s):

Suspicious file

Link:

https://check.spamhaus.org/check/?searchterm=aphtxecpuwvws5kv5qgg5y6aznv3wqvadb3ofuetxv4o3rgl4pya._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/260205-s8dz8sby4f/

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

Formbook payload

Formbook

Formbook family

Unpacked files

SH256 hash:

5d7f4d395762eac04258976693c2f35a76d71d95af5d9cd66a22f0e50c9060c0

MD5 hash:

57a79caeec7601a59a99b977c44ec492

SHA1 hash:

d0dfed444e6ddd1ddb6c3150f2c3a79ebcc0f276

Link:

https://www.unpac.me/results/1022f9f6-65b5-4dee-b9f4-ae69590f8f83/

SH256 hash:

e79e247cf672d578646aeb2261ef759fa52f652198f430c4f8e1f1d0bdf7ec65

MD5 hash:

f9e64af415c5a00027da14ccd2e741b3

SHA1 hash:

3ec6720ed0059659087daca3e0bd3354997cc4ba

Detections:

win_formbook_g0

Link:

https://www.unpac.me/results/1022f9f6-65b5-4dee-b9f4-ae69590f8f83/

Parent samples :

48510d143ff22d526e875bae83f017ff97e46fac7353a63f375b34c33481e3a8
03cf3b904fa5ab697555ec0c6ee3c0cb6bbb42a01876e2d093bd78edc4cbe3f0

SH256 hash:

03cf3b904fa5ab697555ec0c6ee3c0cb6bbb42a01876e2d093bd78edc4cbe3f0

MD5 hash:

88aca4c9d81410e3f6df04aad1d8ec75

SHA1 hash:

315e57d682ad745b64db3a2de9daed1801f982bf

Link:

https://www.unpac.me/results/1022f9f6-65b5-4dee-b9f4-ae69590f8f83/

Malware family:

FormBook

Verdict:

Malicious

Link:

https://www.vmray.com/analyses/_mb/03cf3b904fa5/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/03cf3b904fa5ab697555ec0c6ee3c0cb6bbb42a01876e2d093bd78edc4cbe3f0

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:	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:	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:	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/52193/

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