MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 617fe3238bc5fa85c7621a6aa1ff24322f64a10a4bfd2118a9307bc2189fbad3. 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: 13

Intelligence 13 IOCs YARA 20 File information Comments

SHA256 hash:	617fe3238bc5fa85c7621a6aa1ff24322f64a10a4bfd2118a9307bc2189fbad3
SHA3-384 hash:	6bfca35152fd431f8036b852f797d7dc0e83edf594b894f98c361dfdb187bbb1c0cfde485f0ad37fa3ba307c9da6a686
SHA1 hash:	466a614ad40a81366d7b0ef2645500a78a7b9c01
MD5 hash:	7e9b2b4ac1fc90b3282373e9ef8c0409
humanhash:	violet-nitrogen-kansas-solar
File name:	south.ps1
Download:	download sample
Signature	Formbook Create hunting rule
File size:	1'079'182 bytes
First seen:	2025-09-29 14:16:28 UTC
Last seen:	2025-09-30 09:25:02 UTC
File type:	ps1
MIME type:	text/plain
ssdeep	1536:tGEMbjTwUTUz/1scufyGXWdLAI6++pVAj4IqVpt8yz9vVN9HTOUg0QLVnWFy1X0m:2EUTUz/1scuqaWdLAI6++6
Threatray	1'563 similar samples on MalwareBazaar
TLSH	T17235276203851BBDF68D0FC9C94B205B24F2D4677D251298EBB36EE7BC3B9859430636
Magika	powershell
Reporter	abuse_ch
Tags:	FormBook ps1

Intelligence

File Origin

# of uploads :

# of downloads :

Origin country :

Vendor Threat Intelligence

Detection(s):

SecuriteInfo.com.Generic-EXE.UNOFFICIAL

SecuriteInfo.com.PUA.Base64EXE-2.UNOFFICIAL

Verdict:

Malicious

Score:

99.9%

Link:

https://cyber-fortress.com/docs/result/index.php?id=68da94fa7d643f33eab8bd76

Tags:

ransomware virus spawn

Verdict:

Malicious

Threat level:

10/10

Confidence:

100%

Tags:

base64 evasive obfuscated obfuscated reconnaissance

Link:

https://www.filescan.io/uploads/68da95d774e5a289899852ec/reports/26144c37-357c-4cd3-8f67-31a223d15a6a/overview

Verdict:

Malicious

Labled as:

Trojan.Generic

Link:

https://www.hybrid-analysis.com/sample/617fe3238bc5fa85c7621a6aa1ff24322f64a10a4bfd2118a9307bc2189fbad3

Verdict:

Malicious

File Type:

ps1

First seen:

2025-09-21T21:25:00Z UTC

Last seen:

2025-09-21T21:25:00Z UTC

Hits:

~10

Detections:

Trojan-Spy.Win32.Noon.sb HEUR:Trojan-Dropper.PowerShell.Agent.gen

Link:

https://opentip.kaspersky.com/617fe3238bc5fa85c7621a6aa1ff24322f64a10a4bfd2118a9307bc2189fbad3/results?tab=lookup

Result

Threat name:

FormBook

Detection:

malicious

Classification:

troj.spyw.evad

Score:

100 / 100

Link:

https://www.joesandbox.com/analysis/1785986

Signature

AI detected malicious Powershell script

Injects a PE file into a foreign processes

Joe Sandbox ML detected suspicious sample

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

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

Yara detected MSILLoadEncryptedAssembly

Behaviour

Behavior Graph:

Download SVG

Score:

99%

Verdict:

Malware

File Type:

SCRIPT

Link:

https://malprob.io/report/617fe3238bc5fa85c7621a6aa1ff24322f64a10a4bfd2118a9307bc2189fbad3

Gathering data

Detection:

n/a

Link:

https://mwdb.cert.pl/sample/617fe3238bc5fa85c7621a6aa1ff24322f64a10a4bfd2118a9307bc2189fbad3/

Verdict:

Malicious

Threat:

Family.FORMBOOK

Link:

https://tip.neiki.dev/file/617fe3238bc5fa85c7621a6aa1ff24322f64a10a4bfd2118a9307bc2189fbad3

Threat name:

Script-PowerShell.Backdoor.FormBook

Status:

Malicious

First seen:

2025-09-22 06:44:00 UTC

File Type:

Text (PowerShell)

AV detection:

11 of 24 (45.83%)

Threat level:

5/5

Detection(s):

Suspicious file

Link:

https://check.spamhaus.org/check/?searchterm=mf76gi4lyx5ilr3cdjvkd7zegixwjiikjp6scgfjgb54ege7xljq._file

Verdict:

malicious

Label(s):

formbook

Result

Malware family:

formbook

Score:

10/10

Tags:

family:formbook adware discovery execution persistence privilege_escalation rat spyware stealer trojan

Link:

https://tria.ge/reports/250929-rntphsxzd1/

Behaviour

Modifies Internet Explorer settings

Suspicious behavior: EnumeratesProcesses

Suspicious behavior: MapViewOfSection

Suspicious use of AdjustPrivilegeToken

Suspicious use of WriteProcessMemory

Command and Scripting Interpreter: PowerShell

Event Triggered Execution: Accessibility Features

System Location Discovery: System Language Discovery

Suspicious use of SetThreadContext

Badlisted process makes network request

Formbook payload

Formbook

Formbook family

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

Threat name:

Formbook

Score:

1.00

Link:

https://yomi.yoroi.company/submissions/617fe3238bc5fa85c7621a6aa1ff24322f64a10a4bfd2118a9307bc2189fbad3

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:	ClamAV_Emotet_String_Aggregate Create hunting rule

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__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:	NET Create hunting rule
Author:	malware-lu

Rule name:	pe_no_import_table Create hunting rule
Description:	Detect pe file that no import table

Rule name:	rhadamanthys_ps1_v1 Create hunting rule
Author:	RandomMalware

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:	SUSP_PS1_FromBase64String_Content_Indicator_RID3714 Create hunting rule
Author:	Florian Roth
Description:	Detects suspicious base64 encoded PowerShell expressions
Reference:	https://gist.github.com/Neo23x0/6af876ee72b51676c82a2db8d2cd3639

Rule name:	Sus_CMD_Powershell_Usage Create hunting rule
Author:	XiAnzheng
Description:	May Contain(Obfuscated or no) Powershell or CMD Command that can be abused by threat actor(can create FP)

File information

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

Web download

Formbook

ps1 617fe3238bc5fa85c7621a6aa1ff24322f64a10a4bfd2118a9307bc2189fbad3

(this sample)

URLhaus

https://urlhaus.abuse.ch/url/3633735/

Delivery method

Distributed via web download

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