MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 c5f37af39ee61ae5ae38a6f6a9a8855017a2dc7eea87343299fffce64e5d5d70. 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 19 File information Comments

SHA256 hash:	c5f37af39ee61ae5ae38a6f6a9a8855017a2dc7eea87343299fffce64e5d5d70
SHA3-384 hash:	90c8a1db94e8ed8f689f495ba5678f15657e11f3747766095105ee97a9825b84c257d1e870fc8e5312f4d9cac72d429e
SHA1 hash:	4390818ad36fbfef7415b640158dc95ff08f2628
MD5 hash:	0f0fb76cf9d2003db7dde13685bf66bf
humanhash:	east-batman-london-fanta
File name:	INVOICE.zip
Download:	download sample
Signature	Formbook Create hunting rule
File size:	600'838 bytes
First seen:	2025-03-12 08:51:32 UTC
Last seen:	Never
File type:	zip
MIME type:	application/zip
ssdeep	12288:k+kCO6GD3gxQbpzJTMHalOPVIN8TDx7p1vKjDMWr7U5HPfj7z3:klCO6GzgK1zJTMHa4PVIN8TDx7DyYWra
TLSH	T185D423841EC92D50ECA6EFBACF75910DFDF42E3E286163450E5C29C0484EB6DE70A366
Magika	zip
Reporter	cocaman
Tags:	FormBook INVOICE zip

cocaman

Malicious email (T1566.001)
From: "gdansk@muehlhan.com" (likely spoofed)
Received: "from [195.211.191.129] (unknown [195.211.191.129]) "
Date: "11 Mar 2025 22:46:09 -0700"
Subject: "RE: REV.INVOICE"
Attachment: "INVOICE.zip"

Intelligence

File Origin

# of uploads :

# of downloads :

384

Origin country :

File Archive Information

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

File name:	ilOz40pQOqSYVmp.exe
File size:	657'920 bytes
SHA256 hash:	d0387872c43a63fc0a157c84edc3a99abde2af204ba4f25969209ce38d7ed15f
MD5 hash:	8227f20e3c6651f4a7c428facaee1005
MIME type:	application/x-dosexec
Signature	Formbook

Vendor Threat Intelligence

Verdict:

Malicious

Score:

96.5%

Link:

https://cyber-fortress.com/docs/result/index.php?id=67d15254dff6bd9219087201

Tags:

virus shell msil

Result

Verdict:

Unknown

File Type:

PE File

Link:

https://app.docguard.net/c5f37af39ee61ae5ae38a6f6a9a8855017a2dc7eea87343299fffce64e5d5d70/results/dashboard

Verdict:

Suspicious

Labled as:

Trojan.U.FormBook

Link:

https://www.hybrid-analysis.com/sample/c5f37af39ee61ae5ae38a6f6a9a8855017a2dc7eea87343299fffce64e5d5d70

Result

Verdict:

MALICIOUS

Link:

https://labs.inquest.net/dfi/sha256/c5f37af39ee61ae5ae38a6f6a9a8855017a2dc7eea87343299fffce64e5d5d70

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/250312-let12awtg1/

Behaviour

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/c5f37af39ee61ae5ae38a6f6a9a8855017a2dc7eea87343299fffce64e5d5d70

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:	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)