MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 a81a437f2064bde51350b7a2ead1f87a58fa25bb3f3c4ad676b44ba65d0d33ac. 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

AgentTesla

Vendor detections: 15

Intelligence 15 IOCs YARA 18 File information Comments

SHA256 hash:	a81a437f2064bde51350b7a2ead1f87a58fa25bb3f3c4ad676b44ba65d0d33ac
SHA3-384 hash:	eb30d5d583fbac3619454acdce29a2be2fc842401a26b939896dcc39e4bc29839fc55678a02de63445c82777c29283d4
SHA1 hash:	64839ae3b6d4b8b711e5a45447a46fdb2eba920f
MD5 hash:	d64c4dd442e7e80825afaf0b7f1051d3
humanhash:	montana-violet-oklahoma-timing
File name:	MullvadVpnSetup.exe
Download:	download sample
Signature	AgentTesla Create hunting rule
File size:	209'408 bytes
First seen:	2023-10-02 19:50:09 UTC
Last seen:	Never
File type:	exe
MIME type:	application/x-dosexec
imphash	f34d5f2d4577ed6d9ceec516c1f5a744 (48'663 x AgentTesla, 19'478 x Formbook, 12'208 x SnakeKeylogger)
ssdeep	3072:KworL6kap0yUqBskH+LGP34oSKerVUzeeDXbwa21DH9ua/aHyvZRSd2iss:Kwo/6kap0yUnibwv
Threatray	23 similar samples on MalwareBazaar
TLSH	T14E24A40C67A04625E4FE7B315460FB6B6371A4425B13EE0B4BF158A5DBE33408EDAE63
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)
File icon (PE):
dhash icon	e0e0e26c68e9f0f0 (2 x AgentTesla)
Reporter	stealerkiller
Tags:	AgentTesla exe RAT

Intelligence

File Origin

# of uploads :

# of downloads :

335

Origin country :

Vendor Threat Intelligence

Malware family:

agenttesla

ID:

File name:

MullvadVpnSetup.exe

Verdict:

Malicious activity

Analysis date:

2023-10-02 19:57:11 UTC

Tags:

evasion agenttesla stealer

Link:

https://app.any.run/tasks/52ed5232-05ac-4f8f-b2c3-33440dc1eb1e

Note:

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

Detection(s):

Win.Malware.AgentTesla-6952874-1

Win.Dropper.Razy-6519812-0

Win.Malware.Barys-6820546-0

Win.Packed.Barys-6841771-0

Result

Verdict:

Malware

Maliciousness:

Behaviour

Searching for the window

Сreating synchronization primitives

Using the Windows Management Instrumentation requests

Searching for synchronization primitives

DNS request

Sending an HTTP GET request

Creating a window

Sending an HTTP POST request

Creating a file in the %AppData% subdirectories

Enabling the 'hidden' option for recently created files

Enabling autorun with the standard Software\Microsoft\Windows\CurrentVersion\Run registry branch

Moving of the original file

Verdict:

Malicious

Threat level:

10/10

Confidence:

100%

Tags:

control evasive fingerprint fingerprint infostealer lolbin packed packed replace shell32 stealer stealer

Link:

https://www.filescan.io/uploads/651b1f27426c8727d6e88e34/reports/b9b313b4-72e4-45b3-9b5f-296841712efb/overview

Verdict:

Malicious

Labled as:

MSIL.PasswordStealerA.Generic

Link:

https://www.hybrid-analysis.com/sample/a81a437f2064bde51350b7a2ead1f87a58fa25bb3f3c4ad676b44ba65d0d33ac

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:

Agent Tesla

Verdict:

Malicious

Link:

https://analyze.intezer.com/analyses/2c0205bd-2442-4fba-bc62-a2f256304038

Result

Threat name:

Agent Tesla, AgentTesla

Detection:

malicious

Classification:

phis.troj.spyw.evad

Score:

100 / 100

Link:

https://www.joesandbox.com/analysis/1318260

Signature

.NET source code contains potential unpacker

Antivirus / Scanner detection for submitted sample

Antivirus detection for dropped file

Contains functionality to capture screen (.Net source)

Detected Agent Tesla keylogger

Hides that the sample has been downloaded from the Internet (zone.identifier)

Installs a global keyboard hook

Machine Learning detection for dropped file

Machine Learning detection for sample

Malicious sample detected (through community Yara rule)

May check the online IP address of the machine

Moves itself to temp directory

Multi AV Scanner detection for dropped file

Multi AV Scanner detection for submitted file

Snort IDS alert for network traffic

Tries to harvest and steal browser information (history, passwords, etc)

Tries to harvest and steal ftp login credentials

Tries to harvest and steal Putty / WinSCP information (sessions, passwords, etc)

Tries to steal Instant Messenger accounts or passwords

Tries to steal Mail credentials (via file / registry access)

Yara detected AgentTesla

Yara detected Generic Downloader

Behaviour

Behavior Graph:

Download SVG

Detection:

n/a

Link:

https://mwdb.cert.pl/sample/a81a437f2064bde51350b7a2ead1f87a58fa25bb3f3c4ad676b44ba65d0d33ac/

Threat name:

ByteCode-MSIL.Spyware.Negasteal

Status:

Malicious

First seen:

2023-10-02 19:51:05 UTC

File Type:

PE (.Net Exe)

Extracted files:

AV detection:

21 of 23 (91.30%)

Threat level:

2/5

Detection(s):

Suspicious file

Link:

https://check.spamhaus.org/check/?searchterm=vaneg7zams66ke2qw6rovupypjmpujn3h46evvtwwrf2mxingowa._file

Verdict:

malicious

Label(s):

agenttesla

AgentTesla

0756a29169a580e220b87a4ce60cb7eac6e48ca708be937344127d2dad53f442

AgentTesla

1c86ea69172d009a3cdd1743213353ecfde93cbeeba216b81b2bfcf60934db41

AgentTesla

21fca45c0c0580eb074d8600808520723148c0c0dbd4e3d04c4edd21ff876863

AgentTesla

4121b53175e74dddb4cdce06b699ce06dcf6c62b610060ef2dd9796751a067b8

AgentTesla

4fe2efffd5d2755a2f33aecf92d5291b3e433e9cd2d01b4d507a62ce8225374a

AgentTesla

5a00f31f111a4949a2c5825dc99c807a25679453b61f851019b834ce1e21b390

AgentTesla

680142a2cafcc943b14a2b6984f7186e37bcb0bee2a19ef3d878d1213b93f756

AgentTesla

cc141b7289cd7f46f00dec52019353138badf3df643c6d056b296257221016cc

AgentTesla

+ 13 additional samples on MalwareBazaar

Result

Malware family:

n/a

Score:

7/10

Tags:

collection persistence spyware stealer

Link:

https://tria.ge/reports/231002-yktcxaed3v/

Behaviour

Suspicious behavior: EnumeratesProcesses

Suspicious behavior: RenamesItself

Suspicious use of AdjustPrivilegeToken

Suspicious use of SetWindowsHookEx

outlook_office_path

outlook_win_path

Accesses Microsoft Outlook profiles

Adds Run key to start application

Looks up external IP address via web service

Reads data files stored by FTP clients

Reads user/profile data of local email clients

Reads user/profile data of web browsers

Unpacked files

SH256 hash:

a81a437f2064bde51350b7a2ead1f87a58fa25bb3f3c4ad676b44ba65d0d33ac

MD5 hash:

d64c4dd442e7e80825afaf0b7f1051d3

SHA1 hash:

64839ae3b6d4b8b711e5a45447a46fdb2eba920f

Detections:

win_agent_tesla_g1

Link:

https://www.unpac.me/results/cb12ac4f-f291-4bdc-aec7-fa12e43638c2/

Malware family:

AgentTesla

Verdict:

Malicious

Link:

https://www.vmray.com/analyses/_mb/a81a437f2064/report/overview.html

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

Threat name:

AgentTesla

Score:

0.90

Link:

https://yomi.yoroi.company/submissions/a81a437f2064bde51350b7a2ead1f87a58fa25bb3f3c4ad676b44ba65d0d33ac

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

Rule name:	AgentTeslaV2 Create hunting rule
Author:	ditekshen
Description:	AgenetTesla Type 2 Keylogger payload

Rule name:	AgentTesla_mod_tough_mem Create hunting rule
Author:	James_inthe_box
Reference:	https://app.any.run/tasks/3b5d409c-978b-4a95-a5f1-399f0216873d/

Rule name:	agent_tesla Create hunting rule
Author:	Stormshield
Description:	Detecting HTML strings used by Agent Tesla malware

Rule name:	Disable_Defender Create hunting rule
Author:	iam-py-test
Description:	Detect files disabling or modifying Windows Defender, Windows Firewall, or Microsoft Smartscreen

Rule name:	INDICATOR_SUSPICIOUS_Binary_References_Browsers Create hunting rule
Author:	ditekSHen
Description:	Detects binaries (Windows and macOS) referencing many web browsers. Observed in information stealers.

Rule name:	INDICATOR_SUSPICIOUS_EXE_References_Confidential_Data_Store Create hunting rule
Author:	ditekSHen
Description:	Detects executables referencing many confidential data stores found in browsers, mail clients, cryptocurreny wallets, etc. Observed in information stealers

Rule name:	INDICATOR_SUSPICIOUS_EXE_References_Messaging_Clients Create hunting rule
Author:	ditekSHen
Description:	Detects executables referencing many email and collaboration clients. Observed in information stealers

Rule name:	INDICATOR_SUSPICIOUS_EXE_Referenfces_File_Transfer_Clients Create hunting rule
Author:	ditekSHen
Description:	Detects executables referencing many file transfer clients. Observed in information stealers

Rule name:	INDICATOR_SUSPICIOUS_GENInfoStealer Create hunting rule
Author:	ditekSHen
Description:	Detects executables containing common artifcats observed in infostealers

Rule name:	MALWARE_Win_AgentTeslaV2 Create hunting rule
Author:	ditekSHen
Description:	AgenetTesla Type 2 Keylogger payload

Rule name:	MALWARE_Win_AgentTeslaV3 Create hunting rule
Author:	ditekSHen
Description:	AgentTeslaV3 infostealer payload

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:	NETDLLMicrosoft Create hunting rule
Author:	malware-lu

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

Rule name:	pe_imphash Create hunting rule

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

File information

The table below shows additional information about this malware sample such as delivery method and external references.

Web download

AgentTesla

exe a81a437f2064bde51350b7a2ead1f87a58fa25bb3f3c4ad676b44ba65d0d33ac

(this sample)

Link

http://rakishev.org/wp-load.php

Dropped by

AgentTesla

Delivery method

Distributed via web download

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