MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 b5f06b3e1a8856ea36f9a85336395234bafbe5a909a395c54d06eb54a36f17a3. 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: 5

Intelligence 5 IOCs YARA 28 File information Comments

SHA256 hash:	b5f06b3e1a8856ea36f9a85336395234bafbe5a909a395c54d06eb54a36f17a3
SHA3-384 hash:	1607ff8391cb80626d9bad69d3424279d4e6f094a7f8635c1fd0379f072a98ebad75806c1dc1acc5a5748badc0e50b61
SHA1 hash:	d7009e7ccb4787a13259918cf47f454da5b1eac0
MD5 hash:	0b5320569b694837adca0b9ffb73f5a6
humanhash:	emma-high-winter-mirror
File name:	DOC 331-100920-00.gz
Download:	download sample
Signature	Formbook Create hunting rule
File size:	690'040 bytes
First seen:	2024-04-18 11:22:12 UTC
Last seen:	Never
File type:	gz
MIME type:	application/x-rar
ssdeep	12288:kn4JPajzbf5k6+r6vGlDJzSYiTYNCSpVxUljhTFpMXZkE89:JJiHbRk6+r6cVzXiK/IFFvX9
TLSH	T10AE42316284FC5871EFD730C7A6D85B92AB1BAB0D2232D8E990E21549BF7732D584C1F
TrID	61.5% (.RAR) RAR compressed archive (v5.0) (8000/1) 38.4% (.RAR) RAR compressed archive (gen) (5000/1)
Reporter	cocaman
Tags:	FormBook gz

cocaman

Malicious email (T1566.001)
From: "ARC Service <bookings@kestonvillagehall.org.uk>" (likely spoofed)
Received: "from relay-bulk1.stackmail.com (relay-bulk1.stackmail.com [185.151.28.78]) "
Date: "18 Apr 2024 11:21:29 +0000"
Subject: "Request for ARC 331-1000920-00 "
Attachment: "DOC 331-100920-00.gz"

Intelligence

File Origin

# of uploads :

# of downloads :

120

Origin country :

File Archive Information

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

File name:	DOC 331-100920-00.exe
File size:	1'191'936 bytes
SHA256 hash:	54c9ab39f879d1c9f3fc61e3cb1ffb06ac237bb20647c1f521d09b2dbb4964d2
MD5 hash:	81556c04b78490685e602d47202617e3
MIME type:	application/x-dosexec
Signature	Formbook

Vendor Threat Intelligence

Verdict:

Likely Malicious

Threat level:

7.5/10

Confidence:

100%

Tags:

autoit fingerprint keylogger lolbin packed shell32

Link:

https://www.filescan.io/uploads/662102a3c5dabc22b20211c5/reports/80c427ee-8a3b-4b3d-85ed-24aeecaa2cbd/overview

Verdict:

Unknown

Link:

https://www.hybrid-analysis.com/sample/b5f06b3e1a8856ea36f9a85336395234bafbe5a909a395c54d06eb54a36f17a3

Result

Verdict:

MALICIOUS

Details

Windows PE Executable

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

Detection:

n/a

Link:

https://mwdb.cert.pl/sample/b5f06b3e1a8856ea36f9a85336395234bafbe5a909a395c54d06eb54a36f17a3/

Threat name:

Win32.Trojan.Strab

Status:

Malicious

First seen:

2024-04-18 11:22:14 UTC

File Type:

Binary (Archive)

Extracted files:

AV detection:

6 of 38 (15.79%)

Threat level:

5/5

Detection(s):

Suspicious file

Link:

https://check.spamhaus.org/check/?searchterm=wxygwpq2rblounxzvbjtmoksgs5pxznjbgrzlrkna3vvji3pc6rq._file

Result

Malware family:

n/a

Score:

5/10

Tags:

n/a

Link:

https://tria.ge/reports/240418-pea5psch69/

Behaviour

Modifies Internet Explorer settings

Suspicious behavior: EnumeratesProcesses

Suspicious behavior: MapViewOfSection

Suspicious use of FindShellTrayWindow

Suspicious use of SendNotifyMessage

Suspicious use of UnmapMainImage

Suspicious use of WriteProcessMemory

Program crash

Suspicious use of SetThreadContext

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

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:	AutoIT_Compiled Create hunting rule
Author:	@bartblaze
Description:	Identifies compiled AutoIT script (as EXE). This rule by itself does NOT necessarily mean the detected file is malicious.

Rule name:	DebuggerCheck__API Create hunting rule
Reference:	https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara

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:	Formbook Create hunting rule
Author:	kevoreilly
Description:	Formbook Payload

Rule name:	maldoc_find_kernel32_base_method_1 Create hunting rule
Author:	Didier Stevens (https://DidierStevens.com)

Rule name:	maldoc_getEIP_method_1 Create hunting rule
Author:	Didier Stevens (https://DidierStevens.com)

Rule name:	MD5_Constants Create hunting rule
Author:	phoul (@phoul)
Description:	Look for MD5 constants

Rule name:	meth_get_eip Create hunting rule
Author:	Willi Ballenthin

Rule name:	meth_stackstrings Create hunting rule
Author:	Willi Ballenthin

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:	SUSP_Imphash_Mar23_3 Create hunting rule
Author:	Arnim Rupp (https://github.com/ruppde)
Description:	Detects imphash often found in malware samples (Maximum 0,25% hits with search for 'imphash:x p:0' on Virustotal) = 99,75% hits
Reference:	Internal Research

Rule name:	Windows_Trojan_Formbook Create hunting rule
Author:	@malgamy12

Rule name:	Windows_Trojan_Formbook_1112e116 Create hunting rule
Author:	Elastic Security
Reference:	https://www.elastic.co/security-labs/formbook-adopts-cab-less-approach