MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 4b1997dea1f366e3cb3a64867f0e478e85613827128da935efe1062e44b6e9cb. 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: 10

Intelligence 10 IOCs YARA 22 File information Comments

SHA256 hash:	4b1997dea1f366e3cb3a64867f0e478e85613827128da935efe1062e44b6e9cb
SHA3-384 hash:	0485f70b2f19a41d456ea3afd3e5aa05cd234c3bd972bf54e6040aae8cbc45909a2692f722912aaff6ff0092c84de952
SHA1 hash:	3e9c1ec8b63643d9e88c61c7a2eb1ef7a74298e7
MD5 hash:	f42e374c24c186a20ac06dad1123daea
humanhash:	social-papa-wisconsin-winner
File name:	PROFORMA.zip
Download:	download sample
Signature	Formbook Create hunting rule
File size:	645'613 bytes
First seen:	2025-02-24 13:03:46 UTC
Last seen:	Never
File type:	zip
MIME type:	application/zip
ssdeep	12288:+QPglXNkg0OOCgr/KpRqlTP3fNSXJgQLb9jlir0kJeZhlVxuR:IVNB0RCgKpRwFS5ZPnir0vZhrC
TLSH	T1F5D4238210F180D7DD9BAF432139012A5EB964B688B89FDAE1F5429DDBD107780BCD2E
Magika	zip
Reporter	cocaman
Tags:	FormBook zip

cocaman

Malicious email (T1566.001)
From: "commercial-sha@gotoubi.com" (likely spoofed)
Received: "from [195.211.191.129] (unknown [195.211.191.129]) "
Date: "24 Feb 2025 05:02:55 -0800"
Subject: "PROFORMA"
Attachment: "PROFORMA.zip"

Intelligence

File Origin

# of uploads :

# of downloads :

Origin country :

File Archive Information

This file archive contains 1 file(s), sorted by their relevance:

File name:	yj0y2yTkeKCSdVk.exe
File size:	824'320 bytes
SHA256 hash:	d853825ca0a839c07cb0b00a5d2a418058fa2ba649cce517ed569a566f205ca2
MD5 hash:	df363cebacd23ac839ef11a3689e0a5e
MIME type:	application/x-dosexec
Signature	Formbook

Vendor Threat Intelligence

Verdict:

Malicious

Score:

99.9%

Link:

https://cyber-fortress.com/docs/result/index.php?id=67bc6e4d28ab76d43a5cdff7

Tags:

smarts shell micro

Result

Verdict:

Unknown

File Type:

PE File

Link:

https://app.docguard.net/4b1997dea1f366e3cb3a64867f0e478e85613827128da935efe1062e44b6e9cb/results/dashboard

Verdict:

Suspicious

Threat level:

5/10

Confidence:

100%

Tags:

obfuscated obfuscated packed packed packer_detected vbnet

Link:

https://www.filescan.io/uploads/67bc6e5360f4b4f0724b8ea5/reports/a6180f3b-1688-403d-a939-0290c40ec793/overview

Verdict:

Suspicious

Labled as:

Troj/Krypt

Link:

https://www.hybrid-analysis.com/sample/4b1997dea1f366e3cb3a64867f0e478e85613827128da935efe1062e44b6e9cb

Result

Verdict:

MALICIOUS

Link:

https://labs.inquest.net/dfi/sha256/4b1997dea1f366e3cb3a64867f0e478e85613827128da935efe1062e44b6e9cb

Details

Windows PE Executable

Found a Windows Portable Executable (PE) binary. Depending on context, the presence of a binary is suspicious or malicious.

Score:

100%

Verdict:

Malware

File Type:

Result

Malware family:

formbook

Score:

10/10

Tags:

family:formbook campaign:my18 discovery execution rat spyware stealer trojan

Link:

https://tria.ge/reports/250224-rsl58sxkv9/

Behaviour

Gathers network information

Scheduled Task/Job: Scheduled Task

Suspicious behavior: EnumeratesProcesses

Suspicious behavior: MapViewOfSection

Suspicious use of AdjustPrivilegeToken

Suspicious use of UnmapMainImage

Suspicious use of WriteProcessMemory

Enumerates physical storage devices

System Location Discovery: System Language Discovery

Suspicious use of SetThreadContext

Checks computer location settings

Command and Scripting Interpreter: PowerShell

Formbook payload

Formbook

Formbook family

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/4b1997dea1f366e3cb3a64867f0e478e85613827128da935efe1062e44b6e9cb

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:	AgentTesla_DIFF_Common_Strings_01 Create hunting rule
Author:	schmidtsz
Description:	Identify partial Agent Tesla strings

Rule name:	azov_Dropped Create hunting rule
Author:	Potatech
Description:	Azov Detection

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:	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_imphash 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:	Skystars_Malware_Imphash Create hunting rule
Author:	Skystars LightDefender
Description:	imphash

Rule name:	Suspicious_Latam_MSI_and_ZIP_Files Create hunting rule
Author:	eremit4, P4nd3m1cb0y
Description:	Detects suspicious .msi and .zip files used in Latam banking trojan campaigns.

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)