MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 ca0b238666d773cbe4ba33a83a233f385fa5de90f7b9aa0a75cc6283833fe169. 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 20 File information Comments

SHA256 hash:	ca0b238666d773cbe4ba33a83a233f385fa5de90f7b9aa0a75cc6283833fe169
SHA3-384 hash:	9b6fb21ff3b9df127489e8c490811e12f1281c5d89fe47afbabeea202c02ac1f512d93dca403e274a1d98fcca6a7d054
SHA1 hash:	8610c9cfcab1ebae948d8f43c395a412a42ee983
MD5 hash:	abf477ba4160cf39fa65a0962f7bba3f
humanhash:	july-tennessee-harry-juliet
File name:	ca0b238666d773cbe4ba33a83a233f385fa5de90f7b9aa0a75cc6283833fe169
Download:	download sample
Signature	Formbook Create hunting rule
File size:	722'944 bytes
First seen:	2025-12-08 16:01:33 UTC
Last seen:	Never
File type:	exe
MIME type:	application/x-dosexec
imphash	21371b611d91188d602926b15db6bd48 (70 x Formbook, 33 x AgentTesla, 20 x RemcosRAT)
ssdeep	12288:Yz7hU5I5yuNHIgzSFKxWltRohBfSTso93U6nMiZ3fMO+ubjMjZN2apCifBQDdePt:Yf+iN57Gtene3xMiZ30O3gjZxp5gdeUe
Threatray	2'237 similar samples on MalwareBazaar
TLSH	T190F42251ABE1ED80C6543330C421CC91C5747971AE0A772E871CE5AF79A43A3EE67B2E
TrID	39.1% (.EXE) UPX compressed Win32 Executable (27066/9/6) 38.3% (.EXE) Win32 EXE Yoda's Crypter (26569/9/4) 7.2% (.EXE) Win16 NE executable (generic) (5038/12/1) 6.5% (.EXE) Win32 Executable (generic) (4504/4/1) 2.9% (.EXE) OS/2 Executable (generic) (2029/13)
Magika	pebin
Reporter	adrian__luca
Tags:	exe FormBook UPX

UPX packed

This file is packed with UPX. We have therefore unpacked the file. Below is furhter information about the unpacked (de-compressed) file.

File size (compressed) :	722'944 bytes
File size (de-compressed) :	1'229'312 bytes
Format:	win32/pe
Unpacked file:	f1eb49df840dc35628c04e0de9e85385b2e05440ca66c38f72135418db279b7d

Intelligence

File Origin

# of uploads :

# of downloads :

Origin country :

Vendor Threat Intelligence

Malware configuration found for:

AutoIt PEPacker

Details

AutoIt

extracted scripts and files

PEPacker

a UPX version number and an unpacked binary

Link:

https://research.acce.ciphertechsolutions.com/results/f7057e7d-ddf8-4933-8d2b-51326e4e9a18/

Malware family:

n/a

ID:

File name:

ca0b238666d773cbe4ba33a83a233f385fa5de90f7b9aa0a75cc6283833fe169

Verdict:

Malicious activity

Analysis date:

2025-12-09 05:20:36 UTC

Tags:

autoit upx

Link:

https://app.any.run/tasks/e560b201-3510-4947-9657-18c616de51d9

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/43798/

Verdict:

Malicious

Score:

96.5%

Link:

https://cyber-fortress.com/docs/result/index.php?id=6936f6f0db58e1a2c22b9cc8

Tags:

virus

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_100%

Link:

https://www.hybrid-analysis.com/sample/ca0b238666d773cbe4ba33a83a233f385fa5de90f7b9aa0a75cc6283833fe169

Verdict:

Malicious

File Type:

exe x32

First seen:

2025-11-27T04:15:00Z UTC

Last seen:

2025-12-09T10:39:00Z UTC

Hits:

~1000

Link:

https://opentip.kaspersky.com/ca0b238666d773cbe4ba33a83a233f385fa5de90f7b9aa0a75cc6283833fe169/results?tab=lookup

Gathering data

Score:

100%

Verdict:

Malware

File Type:

Link:

https://malprob.io/report/ca0b238666d773cbe4ba33a83a233f385fa5de90f7b9aa0a75cc6283833fe169

Verdict:

Malware

YARA:

5 match(es)

Tags:

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

Link:

https://app.malva.re/file/abf477ba4160cf39fa65a0962f7bba3f

Detection:

n/a

Link:

https://mwdb.cert.pl/sample/ca0b238666d773cbe4ba33a83a233f385fa5de90f7b9aa0a75cc6283833fe169/

Threat name:

Win32.Malware.Heuristic

Status:

Malicious

First seen:

2025-11-27 08:07:04 UTC

File Type:

PE (Exe)

Extracted files:

AV detection:

19 of 24 (79.17%)

Threat level:

2/5

Detection(s):

Malicious file

Link:

https://check.spamhaus.org/check/?searchterm=zifshbtg25z4xzf2gouduiz7hbp2lxuq6642uctvzrrihaz74fuq._file

Verdict:

malicious

Label(s):

formbook

Formbook

5a13dd5d13e094fa6d10b545dd72855d21143c478ebb5bb589f7334767cd4d34

Formbook

5de40cb80d71ff5cabc77ed1ae871532f78c3a74823c92e0a54ed1a8fd062297

Formbook

6a6baaeecaf011cf1501cf29567579acf459970aab2ed59118a24942504d4670

Formbook

8261528703bade8ae4c6c3b7ff181aaaedf5c12e1c2ab9064cf12326a251cbbd

Formbook

92f21c6b23158368048c41fb77da1a0034ac72e5113264db9d4449f729f66b41

Formbook

a9682daf05dd3a2cc280d1d8682aa875d8d3957e3e2b282af76139c3c3fc8397

Formbook

+ 2'227 additional samples on MalwareBazaar

Result

Malware family:

n/a

Score:

5/10

Tags:

discovery upx

Link:

https://tria.ge/reports/251208-tg2gwsen9t/

Behaviour

Suspicious behavior: MapViewOfSection

Suspicious use of FindShellTrayWindow

Suspicious use of SendNotifyMessage

Suspicious use of WriteProcessMemory

Program crash

System Location Discovery: System Language Discovery

AutoIT Executable

Suspicious use of SetThreadContext

UPX packed file

Verdict:

Suspicious

Tags:

n/a

YARA:

n/a

Link:

https://app.threat.zone/submission/94bda2e1-b99c-4dde-9c7b-1be7660df1dc

Unpacked files

SH256 hash:

ca0b238666d773cbe4ba33a83a233f385fa5de90f7b9aa0a75cc6283833fe169

MD5 hash:

abf477ba4160cf39fa65a0962f7bba3f

SHA1 hash:

8610c9cfcab1ebae948d8f43c395a412a42ee983

Link:

https://www.unpac.me/results/0e6b194b-dcaa-497d-adc6-cafdc13da6d3/

SH256 hash:

f1eb49df840dc35628c04e0de9e85385b2e05440ca66c38f72135418db279b7d

MD5 hash:

8ec449db938269a4e7642f31781eff5c

SHA1 hash:

b9376831a0c8c9966b07ce9ba412f0cabfa0b560

Detections:

AutoIT_Compiled

Link:

https://www.unpac.me/results/0e6b194b-dcaa-497d-adc6-cafdc13da6d3/

Parent samples :

ca0b238666d773cbe4ba33a83a233f385fa5de90f7b9aa0a75cc6283833fe169
f1eb49df840dc35628c04e0de9e85385b2e05440ca66c38f72135418db279b7d

SH256 hash:

80858ac79c0b8d117c58bf3bae85004fded91c812dd684274a9a7349730d9630

MD5 hash:

2efeda40bedf4271be629571de4798de

SHA1 hash:

67fe925769506d614f3c8d201f10cf44bc4b547e

Link:

https://www.unpac.me/results/0e6b194b-dcaa-497d-adc6-cafdc13da6d3/

SH256 hash:

909ca86f2920ea2d12b27f1368cdb8584dc542fb3bdc8758121512a9fbff4888

MD5 hash:

b4d7a507be074520de4e0af95615cc5a

SHA1 hash:

50b16eafd7e45dbe5dddda393b0a7694fcf54646

Detections:

win_formbook_g0

Link:

https://www.unpac.me/results/0e6b194b-dcaa-497d-adc6-cafdc13da6d3/

Parent samples :
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Malware family:

FormBook

Verdict:

Malicious

Link:

https://www.vmray.com/analyses/_mb/ca0b238666d7/report/overview.html

Please note that we are no longer able to provide a coverage score for Virus Total.

Threat name:

Malicious File

Score:

0.94

Link:

https://yomi.yoroi.company/submissions/ca0b238666d773cbe4ba33a83a233f385fa5de90f7b9aa0a75cc6283833fe169

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:	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:	MD5_Constants Create hunting rule
Author:	phoul (@phoul)
Description:	Look for MD5 constants

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:	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_Win_ETW_Bypass_2025_CYFARE Create hunting rule
Author:	CYFARE
Description:	Windows ETW Bypass Detection Rule - 2025
Reference:	https://cyfare.net/

Rule name:	UPXV200V290MarkusOberhumerLaszloMolnarJohnReiser Create hunting rule
Author:	malware-lu

Rule name:	upx_largefile Create hunting rule
Author:	k3nr9

File information

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

Formbook

exe ca0b238666d773cbe4ba33a83a233f385fa5de90f7b9aa0a75cc6283833fe169

(this sample)

Formbook

exe f1eb49df840dc35628c04e0de9e85385b2e05440ca66c38f72135418db279b7d

Dropping

SHA256 f1eb49df840dc35628c04e0de9e85385b2e05440ca66c38f72135418db279b7d

Dropping

MD5 8ec449db938269a4e7642f31781eff5c

Cape

https://www.capesandbox.com/analysis/43798/

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