MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 5b597b034a4555b857365514af3ae299b0b20b66acb8ad6d674c467ec49e48cd. 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: 6

Intelligence 6 IOCs YARA 1 File information Comments

SHA256 hash:	5b597b034a4555b857365514af3ae299b0b20b66acb8ad6d674c467ec49e48cd
SHA3-384 hash:	bb0b2f6a068fab38953abe8910d5e0d4b5d6d8a5e1ac3521d646b0e22443885222cf32a4de7832acdaa253c6b5e3be04
SHA1 hash:	0fb41eca3bacdf9875818c6dde4a720b751f2f6b
MD5 hash:	13334d1d1f4bf9495ef9decd14269f11
humanhash:	neptune-solar-robin-social
File name:	purchaseorder.doc
Download:	download sample
Signature	Formbook Create hunting rule
File size:	18'924 bytes
First seen:	2020-08-04 11:00:53 UTC
Last seen:	Never
File type:	doc
MIME type:	application/vnd.openxmlformats-officedocument.wordprocessingml.document
ssdeep	384:/imtng1Ay2XX2C78OJK3utcT1pLbgHhW8:/LgSy2XXx8a7U1FgI8
TLSH	B682B03288053123E29352BA70A94571F74C0656678AEAFB2C46FFCCD3D16C72346D9A
Reporter	abuse_ch
Tags:	doc FormBook

abuse_ch

Malspam distributing Formbook:

HELO: server0.ihswt.com
Sending IP: 142.11.236.209
From: "Decorum Vin Ltd" <sales@ihswt.com>
Subject: Purchase Order
Attachment: purchaseorder.doc

FormBook paylod URL:
https://ryetgvteg.gb.net/po.exe

Intelligence

File Origin

# of uploads :

# of downloads :

Origin country :

n/a

Vendor Threat Intelligence

Detection(s):

TwinWave.EvilDoc.DOCXRSTRGOOD.WIN32_PROCESS.200408.UNOFFICIAL

TwinWave.EvilDoc.DOCXRSTRGOOD.WINMGMTS

TwinWave.EvilDoc.DOCXRSTRGOOD.WIN32_PROCESS.200402.UNOFFICIAL

Result

Verdict:

Malware

Maliciousness:

Behaviour

Creating a window

Using the Windows Management Instrumentation requests

Creating a file in the %temp% directory

Launching a process

Creating a process with a hidden window

Deleting a recently created file

DNS request

Sending a custom TCP request

Bypassing of proactive protection methods using Windows Management Instrumentation (WMI)

Launching a process by exploiting the app vulnerability

Result

Threat name:

Unknown

Detection:

malicious

Classification:

expl

Score:

68 / 100

Link:

https://www.joesandbox.com/analysis/409131

Signature

Compiles downloader code with a AMSI bypass

Creates processes via WMI

Sigma detected: Dot net compiler compiles file from suspicious location

Sigma detected: Suspicious Csc.exe Source File Folder

Suspicious powershell command line found

Very long command line found

Behaviour

Behavior Graph:

Download SVG

Detection:

n/a

Link:

https://mwdb.cert.pl/sample/5b597b034a4555b857365514af3ae299b0b20b66acb8ad6d674c467ec49e48cd/

Threat name:

Script-Macro.Trojan.FormBook

Status:

Malicious

First seen:

2020-08-04 11:02:06 UTC

AV detection:

27 of 48 (56.25%)

Threat level:

5/5

Detection(s):

Suspicious file

Link:

https://check.spamhaus.org/check/?searchterm=lnmxwa2kivk3qvzwkukk6oxctgylec3gvs4k23lhjrdh5re6jdgq._file

Result

Malware family:

n/a

Score:

10/10

Tags:

n/a

Link:

https://tria.ge/reports/200804-jv16zqdp7j/

Behaviour

Suspicious use of WriteProcessMemory

Suspicious behavior: AddClipboardFormatListener

Suspicious use of SetWindowsHookEx

Suspicious use of AdjustPrivilegeToken

Suspicious behavior: EnumeratesProcesses

Enumerates system info in registry

Suspicious use of AdjustPrivilegeToken

Suspicious behavior: EnumeratesProcesses

Checks processor information in registry

Suspicious use of SetWindowsHookEx

Suspicious behavior: AddClipboardFormatListener

Suspicious use of WriteProcessMemory

Office loads VBA resources, possible macro or embedded object present

Drops file in System32 directory

Blacklisted process makes network request

Executes dropped EXE

Process spawned unexpected child process

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

Threat name:

NJRat

Score:

1.00

Link:

https://yomi.yoroi.company/submissions/5b597b034a4555b857365514af3ae299b0b20b66acb8ad6d674c467ec49e48cd

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.