MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 89b397780f524d548d09d5a8b86a0506f45282dac4faecff735c4d4d8a8828ec. 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: 7

Intelligence 7 IOCs YARA 22 File information Comments

SHA256 hash:	89b397780f524d548d09d5a8b86a0506f45282dac4faecff735c4d4d8a8828ec
SHA3-384 hash:	32cd3467e0e6605bab45f8672900fbe5215c4e5aeb9a28cce063ff4359786732207c4d3f43a5d3fab7ba6dfb4118ebe6
SHA1 hash:	57b2aabe723ce30b2bcb2ee297277ca55393cefe
MD5 hash:	67365fdfbd1e4977b928edc6f5683ca4
humanhash:	monkey-cola-stairway-utah
File name:	ENQUIRY.rar
Download:	download sample
Signature	Formbook Create hunting rule
File size:	211'177 bytes
First seen:	2025-04-22 11:39:05 UTC
Last seen:	2025-04-22 15:55:27 UTC
File type:	rar
MIME type:	application/x-rar
ssdeep	3072:6wIhoLqjmIFe2NJ+jBlbZYjWmbDL4+oLzqr6zzp48VYgvySA+7YS8xYKeCWTcD2q:oA4thJ+dlbcDU+gGMW8m4y+KeC/D2+Se
TLSH	T1532422351B3B9E7AA18B3BC6403E84CBAFEC0436D9C73FDB405C5B72942A191569E438
TrID	61.5% (.RAR) RAR compressed archive (v5.0) (8000/1) 38.4% (.RAR) RAR compressed archive (gen) (5000/1)
Magika	rar
Reporter	cocaman
Tags:	FormBook rar RFQ

cocaman

Malicious email (T1566.001)
From: "fesseha@eri-rwanda.com" (likely spoofed)
Received: "from [45.144.212.173] (unknown [45.144.212.173]) "
Date: "22 Apr 2025 01:49:11 -0700"
Subject: "new purchase order RFQ-HL51L05"
Attachment: "RFQ-HL51.rar"

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:	VZXBSD.exe
File size:	229'376 bytes
SHA256 hash:	896dacfb811fcde80b97bb497aa5abc2dc3bcdedae8c0791512b208aea6b65bf
MD5 hash:	88bc69b054558e4f2dc95106a1c3e3a8
MIME type:	application/x-dosexec
Signature	Formbook

Vendor Threat Intelligence

Verdict:

Malicious

Score:

81.4%

Link:

https://cyber-fortress.com/docs/result/index.php?id=68078045209c4a5e907ab5c2

Tags:

packed virus msil

Verdict:

Malicious

Threat level:

10/10

Confidence:

100%

Tags:

confuser confuserex entropy obfuscated obfuscated packed packed packer_detected

Link:

https://www.filescan.io/uploads/68077fea90767142c3dfc0a7/reports/0598519a-6151-40f9-9ef7-809659be603f/overview

Verdict:

Unknown

Link:

https://www.hybrid-analysis.com/sample/89b397780f524d548d09d5a8b86a0506f45282dac4faecff735c4d4d8a8828ec

Detection:

n/a

Link:

https://mwdb.cert.pl/sample/89b397780f524d548d09d5a8b86a0506f45282dac4faecff735c4d4d8a8828ec/

Threat name:

Win32.Backdoor.FormBook

Status:

Malicious

First seen:

2025-04-22 10:13:35 UTC

File Type:

Binary (Archive)

Extracted files:

AV detection:

24 of 38 (63.16%)

Threat level:

5/5

Detection(s):

Suspicious file

Link:

https://check.spamhaus.org/check/?searchterm=rgzzo6apkjgvjdij2wulq2qfa32ffaw2yt5oz73tlrgu3cuifdwa._file

Result

Malware family:

formbook

Score:

10/10

Tags:

family:formbook campaign:hi13 discovery rat spyware stealer trojan

Link:

https://tria.ge/reports/250422-ryrb5sskv8/

Behaviour

Modifies registry class

Suspicious behavior: EnumeratesProcesses

Suspicious behavior: GetForegroundWindowSpam

Suspicious behavior: MapViewOfSection

Suspicious use of AdjustPrivilegeToken

Suspicious use of UnmapMainImage

Suspicious use of WriteProcessMemory

Uses Task Scheduler COM API

System Location Discovery: System Language Discovery

Suspicious use of SetThreadContext

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/89b397780f524d548d09d5a8b86a0506f45282dac4faecff735c4d4d8a8828ec

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:	INDICATOR_EXE_Packed_ConfuserEx Create hunting rule
Author:	ditekSHen
Description:	Detects executables packed with ConfuserEx Mod

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:	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)