MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 395af6b7f6bc4e92938f11552d83d444b18e27708796de86396b91c3898adec4. 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: 8

Intelligence 8 IOCs YARA 3 File information Comments

SHA256 hash:	395af6b7f6bc4e92938f11552d83d444b18e27708796de86396b91c3898adec4
SHA3-384 hash:	8794ba871d5cd66af166fcf39b34a74cfabdcd68dd1fc8b80aa43cc2a624452d82ccaad17f33dd965b447afbaa62f1da
SHA1 hash:	38d84b90598959ea1fdaa1ffa003ab766550474e
MD5 hash:	f066aab0356d73c85654cbcf5c763a78
humanhash:	purple-iowa-carolina-bluebird
File name:	Quotation-pdf-file.exe
Download:	download sample
Signature	Formbook Create hunting rule
File size:	470'016 bytes
First seen:	2020-10-27 12:28:15 UTC
Last seen:	Never
File type:	exe
MIME type:	application/x-dosexec
imphash	f34d5f2d4577ed6d9ceec516c1f5a744 (48'748 x AgentTesla, 19'643 x Formbook, 12'245 x SnakeKeylogger)
ssdeep	6144:zlzdTZ4rjNxG/i/OfFGr6rLqt0MPYHBlvaXQuW8MOPMfiqH:zV/4rjvGiO9C6r2t0jHBl+QuWLVi
Threatray	372 similar samples on MalwareBazaar
TLSH	78A4C0B13D92587ECA6B077515B985C0FAB626C73FA08B0D716F430C0E15A6BEB5324B
Reporter	abuse_ch
Tags:	exe FormBook

abuse_ch

Malspam distributing unidentified malware:

From: "高静" <gj@mascube.com>
Subject: RE: Quote and price list request
Attachment: QUOTATION.rar (contains "Quotation-pdf-file.exe")

Intelligence

File Origin

# of uploads :

# of downloads :

107

Origin country :

n/a

Vendor Threat Intelligence

Detection:

Formbook

Link:

https://www.capesandbox.com/analysis/79867/

Result

Verdict:

Malware

Maliciousness:

Behaviour

Sending a UDP request

Creating a file in the %temp% subdirectories

Creating a window

Creating a file

Creating a process from a recently created file

Launching a process

Launching cmd.exe command interpreter

Unauthorized injection to a recently created process

Unauthorized injection to a recently created process by context flags manipulation

Unauthorized injection to a system process

Result

Threat name:

FormBook

Detection:

malicious

Classification:

troj.evad

Score:

92 / 100

Link:

https://www.joesandbox.com/analysis/513478

Signature

.NET source code contains very large array initializations

Allocates memory in foreign processes

Initial sample is a PE file and has a suspicious name

Injects a PE file into a foreign processes

Machine Learning detection for sample

Malicious sample detected (through community Yara rule)

Multi AV Scanner detection for submitted file

Tries to detect virtualization through RDTSC time measurements

Writes to foreign memory regions

Yara detected FormBook

Behaviour

Behavior Graph:

Download SVG

Detection:

n/a

Link:

https://mwdb.cert.pl/sample/395af6b7f6bc4e92938f11552d83d444b18e27708796de86396b91c3898adec4/

Threat name:

ByteCode-MSIL.Trojan.FormBook

Status:

Malicious

First seen:

2020-10-27 02:15:48 UTC

AV detection:

24 of 29 (82.76%)

Threat level:

5/5

Detection(s):

Suspicious file

Link:

https://check.spamhaus.org/check/?searchterm=hfnpnn7wxrhjfe4pcfks3a6uisyy4j3qq6ln5brznoi4hcmk33ca._file

Verdict:

unknown

Result

Malware family:

formbook

Score:

10/10

Tags:

family:formbook rat spyware stealer trojan

Link:

https://tria.ge/reports/201027-e6wz1x2mze/

Behaviour

Enumerates system info in registry

Suspicious behavior: EnumeratesProcesses

Suspicious behavior: MapViewOfSection

Suspicious use of AdjustPrivilegeToken

Suspicious use of FindShellTrayWindow

Suspicious use of SendNotifyMessage

Suspicious use of WriteProcessMemory

Program crash

Suspicious use of SetThreadContext

Loads dropped DLL

Executes dropped EXE

Formbook Payload

Formbook

Malware Config

C2 Extraction:

http://www.elchef.club/ee5/

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

Threat name:

Remcos

Score:

1.00

Link:

https://yomi.yoroi.company/submissions/395af6b7f6bc4e92938f11552d83d444b18e27708796de86396b91c3898adec4

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:	Formbook Create hunting rule
Author:	JPCERT/CC Incident Response Group
Description:	detect Formbook in memory
Reference:	internal research

Rule name:	win_formbook_auto Create hunting rule
Author:	Felix Bilstein - yara-signator at cocacoding dot com
Description:	autogenerated rule brought to you by yara-signator