MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 c0fdf9d2bccc736513e0a8b62dd671fc8563db87bd7cd9c7e063250a2a3da655. 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: 9

Intelligence 9 IOCs YARA 16 File information Comments

SHA256 hash:	c0fdf9d2bccc736513e0a8b62dd671fc8563db87bd7cd9c7e063250a2a3da655
SHA3-384 hash:	1c5d7a102bcdc018a6b7119ca6c20152266a6f3ce5427c42dadbf25c1f35d26b5bc9666be17191541269d16fc0e910af
SHA1 hash:	72780fa89c028e9ef100ae0249e9e0bc5c0fce7e
MD5 hash:	0b4362928ae4003afb3e9c7ed01e8f95
humanhash:	kentucky-nine-ink-fix
File name:	MV_GREEN_GEM_APPOINTMENT_LETTER.js
Download:	download sample
Signature	Formbook Create hunting rule
File size:	3'107'802 bytes
First seen:	2026-09-07 03:25:39 UTC
Last seen:	Never
File type:	js
MIME type:	text/plain
ssdeep	12288:BS68PhH1nM7HkldZDK0E7FW88UGwxS6phFXPfnb4cRCPLvrXZ0x6Dsrgvy0FWIgv:B/YhHe78zDKZv
TLSH	T1DCE5D6F377F9B1875E0463BE948DA4888F89C4581BCBB5C4A0DB48D9658F8C63AC4C5B
Magika	javascript
Reporter	threatcat_ch
Tags:	FormBook js

Intelligence

File Origin

# of uploads :

# of downloads :

156

Origin country :

Vendor Threat Intelligence

No detections

Verdict:

Malicious

Threat level:

10/10

Confidence:

100%

Tags:

anti-vm aspnet_compiler base64 base64 cscript downloader encrypted evasive evasive fingerprint lolbin obfuscated obfuscated powershell reconnaissance repaired taskkill wscript

Link:

https://www.filescan.io/uploads/6a9e2ed61e9fcee10649b03f/reports/536d7ebc-6947-4638-819d-54349c484618/overview

Verdict:

Malicious

Labled as:

Trojan/JS.Obfuscated

Link:

https://www.hybrid-analysis.com/sample/c0fdf9d2bccc736513e0a8b62dd671fc8563db87bd7cd9c7e063250a2a3da655

Verdict:

Malicious

File Type:

First seen:

2026-09-07T00:08:00Z UTC

Last seen:

2026-09-08T02:04:00Z UTC

Hits:

~10000

Link:

https://opentip.kaspersky.com/c0fdf9d2bccc736513e0a8b62dd671fc8563db87bd7cd9c7e063250a2a3da655/results?tab=lookup

Result

Threat name:

FormBook

Detection:

malicious

Classification:

troj.spyw.expl.evad

Score:

100 / 100

Link:

https://www.joesandbox.com/analysis/1969158

Signature

Bypasses PowerShell execution policy

Found direct / indirect Syscall (likely to bypass EDR)

Injects a PE file into a foreign processes

JavaScript file contains suspicious strings

JavaScript source code contains functionality to generate code involving a shell, file or stream

Malicious sample detected (through community Yara rule)

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

Queues an APC in another process (thread injection)

Sigma detected: WScript or CScript Dropper

Suspicious execution chain found

Suspicious powershell command line found

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)

Windows Scripting host queries suspicious COM object (likely to drop second stage)

Writes to foreign memory regions

WScript reads language and country specific registry keys (likely country aware script)

Wscript starts Powershell (via cmd or directly)

Yara detected FormBook

Yara detected Powershell decode and execute

Behaviour

Behavior Graph:

Download SVG

Score:

100%

Verdict:

Malware

File Type:

SCRIPT

Link:

https://malprob.io/report/c0fdf9d2bccc736513e0a8b62dd671fc8563db87bd7cd9c7e063250a2a3da655

Gathering data

Detection:

n/a

Link:

https://mwdb.cert.pl/sample/c0fdf9d2bccc736513e0a8b62dd671fc8563db87bd7cd9c7e063250a2a3da655/

Detection(s):

Suspicious file

Link:

https://check.spamhaus.org/check/?searchterm=yd67tuv4zrzwke7avc3c3vtr7scwhw4hxv6ntr7ammsqukr5uzkq._file

Result

Malware family:

formbook

Score:

10/10

Tags:

family:formbook adware collection defense_evasion discovery execution rat spyware stealer trojan

Link:

https://tria.ge/reports/260907-dzah5axgqb/

Behaviour

Kills process with taskkill

Modifies Internet Explorer settings

Suspicious behavior: EnumeratesProcesses

Suspicious behavior: MapViewOfSection

Suspicious use of AdjustPrivilegeToken

Suspicious use of WriteProcessMemory

outlook_office_path

Command and Scripting Interpreter: JavaScript

Enumerates physical storage devices

System Location Discovery: System Language Discovery

Suspicious use of SetThreadContext

Accesses Microsoft Outlook profiles

Checks computer location settings

Badlisted process makes network request

Command and Scripting Interpreter: PowerShell

Family: Formbook

Formbook payload

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/c0fdf9d2bccc736513e0a8b62dd671fc8563db87bd7cd9c7e063250a2a3da655

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:	Base64_Encoded_Powershell_Directives Create hunting rule

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:	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/

File information

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

Malspam

Formbook

js c0fdf9d2bccc736513e0a8b62dd671fc8563db87bd7cd9c7e063250a2a3da655

(this sample)

Delivery method

Distributed via e-mail attachment

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