MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 b77e4af833185c72590d344fd8f555b95de97ae7ca5c6ff5109a2d204a0d2b8e. 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: 14

Intelligence 14 IOCs YARA 12 File information Comments

SHA256 hash:	b77e4af833185c72590d344fd8f555b95de97ae7ca5c6ff5109a2d204a0d2b8e
SHA3-384 hash:	e079397aeffeffb8c9e931cd7791972dec452ed7db99813962718d7290c767eb84f71706d0be2c47b1fbea0026dc6cb6
SHA1 hash:	89f104911e2a54d612a791940501f74687b39046
MD5 hash:	6a79e63153f793a8713a591c80167cb3
humanhash:	low-video-charlie-ink
File name:	ClientAny.exe
Download:	download sample
Signature	Formbook Create hunting rule
File size:	75'776 bytes
First seen:	2023-10-01 07:51:05 UTC
Last seen:	Never
File type:	exe
MIME type:	application/x-dosexec
imphash	f34d5f2d4577ed6d9ceec516c1f5a744 (48'658 x AgentTesla, 19'469 x Formbook, 12'208 x SnakeKeylogger)
ssdeep	1536:1ULkcxVKpC6yPMVKe9VdQuDI6H1bf/cLoBQzcGLVclN:1UocxVENyPMVKe9VdQsH1bfDQfBY
Threatray	355 similar samples on MalwareBazaar
TLSH	T1FB735B013BE8CD2AE2AD47B9ACF255074EF4D1576512CE5E3CC440CD5A67BC58A037EA
TrID	60.4% (.EXE) Generic CIL Executable (.NET, Mono, etc.) (73123/4/13) 10.8% (.SCR) Windows screen saver (13097/50/3) 8.7% (.EXE) Win64 Executable (generic) (10523/12/4) 5.4% (.DLL) Win32 Dynamic Link Library (generic) (6578/25/2) 4.1% (.EXE) Win16 NE executable (generic) (5038/12/1)
Reporter	JAMESWT_WT
Tags:	94-156-253-109 exe Fake-CVE-2023-40477 FormBook VenomRAT

Intelligence

File Origin

# of uploads :

# of downloads :

166

Origin country :

Vendor Threat Intelligence

Malware family:

n/a

ID:

File name:

http://checkblacklistwords.eu/words.txt

Verdict:

Malicious activity

Analysis date:

2023-08-23 08:42:36 UTC

Tags:

loader

Link:

https://app.any.run/tasks/12df6886-fe8f-46f6-9b1b-654c1da03c7b

Note:

ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample

Detection:

n/a

Link:

https://www.capesandbox.com/analysis/452442/

Detection(s):

Win.Packed.Razy-9807129-0

Win.Malware.Generickdz-9865912-0

Win.Trojan.AsyncRAT-9914220-0

Result

Verdict:

Malware

Maliciousness:

Behaviour

Creating a file in the %AppData% subdirectories

Сreating synchronization primitives

Creating a window

DNS request

Sending an HTTP GET request

Setting a global event handler for the keyboard

Verdict:

Malicious

Threat level:

10/10

Confidence:

100%

Tags:

anti-debug anti-vm configsecuritypolicy evasive hacktool keylogger lolbin mpcmdrun msconfig msiexec njrat packed rat razy regedit replace schtasks

Link:

https://www.filescan.io/uploads/6519252333582f234e0894fc/reports/85a9520a-3a23-4b21-9050-35698038442b/overview

Verdict:

Malicious

Labled as:

Trojan.Generic

Link:

https://www.hybrid-analysis.com/sample/b77e4af833185c72590d344fd8f555b95de97ae7ca5c6ff5109a2d204a0d2b8e

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.

Malware family:

ModernLoader

Verdict:

Malicious

Link:

https://analyze.intezer.com/analyses/c5d048a0-154f-4018-8174-6ef56e4edd5b

Result

Threat name:

AsyncRAT, VenomRAT

Detection:

malicious

Classification:

troj.spyw.evad

Score:

100 / 100

Link:

https://www.joesandbox.com/analysis/1317462

Signature

.NET source code contains potential unpacker

.NET source code references suspicious native API functions

Antivirus / Scanner detection for submitted sample

Antivirus detection for URL or domain

Contains functionality to log keystrokes (.Net Source)

Machine Learning detection for sample

Malicious sample detected (through community Yara rule)

Multi AV Scanner detection for domain / URL

Multi AV Scanner detection for submitted file

Yara detected AsyncRAT

Yara detected VenomRAT

Behaviour

Behavior Graph:

Download SVG

Detection:

n/a

Link:

https://mwdb.cert.pl/sample/b77e4af833185c72590d344fd8f555b95de97ae7ca5c6ff5109a2d204a0d2b8e/

Threat name:

ByteCode-MSIL.Backdoor.AsyncRAT

Status:

Malicious

First seen:

2023-08-11 04:23:49 UTC

File Type:

PE (.Net Exe)

Extracted files:

AV detection:

31 of 38 (81.58%)

Threat level:

5/5

Detection(s):

Malicious file

Link:

https://check.spamhaus.org/check/?searchterm=w57ev6btdbohewingrh5r5kvxfo6s6xhzjog75iqtiwsasqnfoha._file

Verdict:

malicious

Formbook

19554d3c701bb2d8c3d86adaabc4843b400278cb5d0a013c18ebeb5e20a2e8a0

Formbook

19ff6f8df881b811dc4719e6a8c2b91d94323f7f2b05cec93f5c11d0d8e61143

Formbook

2297e75fe8813c4d7c4b3514e0763d2cdc08b1b8a30962afac4dc6f00ce6fddf

Formbook

3967608368d8e5ff9ce5a8fed7baedfa7e4331a8bfd4a7c3337c825e4b22e972

Formbook

800d7d569bde7e5f450e1848e54aa47df0811d7dcb5c338c0cc311b8f55cb9c5

Formbook

acba581f0c34cd415335c86268ed38a453df315f8cf878992f846c20bc8a1877

Formbook

b62fc62a03e4d6c0eac25a8b104d8064288fdc5665ddc19ba55ed520ab9f2827

Formbook

f52211f91feb402172b2353d628d74922ec8233bffe21cb504634be39560adaf

Formbook

+ 345 additional samples on MalwareBazaar

Result

Malware family:

asyncrat

Score:

10/10

Tags:

family:asyncrat botnet:default rat

Link:

https://tria.ge/reports/231001-jqdr3sba58/

Behaviour

Suspicious behavior: EnumeratesProcesses

Suspicious use of AdjustPrivilegeToken

Suspicious use of SetWindowsHookEx

Async RAT payload

AsyncRat

Unpacked files

SH256 hash:

b77e4af833185c72590d344fd8f555b95de97ae7ca5c6ff5109a2d204a0d2b8e

MD5 hash:

6a79e63153f793a8713a591c80167cb3

SHA1 hash:

89f104911e2a54d612a791940501f74687b39046

Detections:

VenomRat

Link:

https://www.unpac.me/results/2d564c00-994e-48fc-8765-e631757a1128/

Verdict:

Malicious

Link:

https://www.vmray.com/analyses/_mb/b77e4af83318/report/overview.html

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

Threat name:

iSpy Keylogger

Score:

1.00

Link:

https://yomi.yoroi.company/submissions/b77e4af833185c72590d344fd8f555b95de97ae7ca5c6ff5109a2d204a0d2b8e

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:	AcRat Create hunting rule
Author:	Nikos 'n0t' Totosis
Description:	AcRat Payload (based on AsyncRat)

Rule name:	INDICATOR_SUSPICIOUS_EXE_WMI_EnumerateVideoDevice Create hunting rule
Author:	ditekSHen
Description:	Detects executables attemping to enumerate video devices using WMI

Rule name:	MAL_AsnycRAT Create hunting rule
Author:	SECUINFRA Falcon Team
Description:	Detects AsnycRAT based on it's config decryption routine

Rule name:	MAL_AsyncRAT_Config_Decryption Create hunting rule
Author:	SECUINFRA Falcon Team
Description:	Detects AsnycRAT based on it's config decryption routine

Rule name:	Multifamily_RAT_Detection Create hunting rule
Author:	Lucas Acha (http://www.lukeacha.com)
Description:	Generic Detection for multiple RAT families, PUPs, Packers and suspicious executables

Rule name:	NET Create hunting rule
Author:	malware-lu

Rule name:	NETexecutableMicrosoft Create hunting rule
Author:	malware-lu

Rule name:	Njrat Create hunting rule
Author:	botherder https://github.com/botherder
Description:	Njrat

Rule name:	pe_imphash Create hunting rule

Rule name:	Skystars_Malware_Imphash Create hunting rule
Author:	Skystars LightDefender
Description:	imphash

Rule name:	SUSP_DOTNET_PE_List_AV Create hunting rule
Author:	SECUINFRA Falcon Team
Description:	Detecs .NET Binary that lists installed AVs

Rule name:	win_asyncrat_unobfuscated Create hunting rule
Author:	Matthew @ Embee_Research
Description:	Detects strings present in unobfuscated AsyncRat Samples. Rule may also pick up on other Asyncrat-derived malware (Dcrat/venom etc)