MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 83a4040f51f86dd5a5da772636d1a2271962a87b42994fdaa53438c24b142376. 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: 9

Intelligence 9 IOCs YARA 3 File information Comments

SHA256 hash:	83a4040f51f86dd5a5da772636d1a2271962a87b42994fdaa53438c24b142376
SHA3-384 hash:	a005373f7693985edd092841309a3af03a84844970ab897d1f5cc3ee0219d6e0113a8a6aa6ecfebd51c8700acae3fc25
SHA1 hash:	8b2822c8a8a38a3a580a4220c7e4d156242ced3b
MD5 hash:	6cf75fa9b14b0a2dc51a225baa80d48d
humanhash:	eleven-four-undress-idaho
File name:	INV_11082020025628.exe
Download:	download sample
Signature	AgentTesla Create hunting rule
File size:	608'768 bytes
First seen:	2020-08-11 11:48:28 UTC
Last seen:	2020-08-11 13:19:17 UTC
File type:	exe
MIME type:	application/x-dosexec
imphash	f34d5f2d4577ed6d9ceec516c1f5a744 (48'652 x AgentTesla, 19'462 x Formbook, 12'204 x SnakeKeylogger)
ssdeep	12288:oufclTM2RLxLfgzGRSp4YsV2d9XQfkiEirjEhBlXU3XWYqPvaA:2MQLxjUGRL2TQ8ErGsXWVPvaA
Threatray	109 similar samples on MalwareBazaar
TLSH	E8D4F141A6C44B45C03E97BDC721145613F3DD2AD739EF0ABF873AE94AA27728742A07
Reporter	abuse_ch
Tags:	AgentTesla exe

abuse_ch

Malspam distributing AgentTesla:

HELO: cloudhost-139902.us-midwest-1.nxcli.net
Sending IP: 209.126.30.34
From: Caroline Reynolds <caroline.reynolds@stoneagetool.com>
Subject: RE: RE: JULY INVOICES
Attachment: INV_11082020025628.r00 (contains "INV_11082020025628.exe")

Intelligence

File Origin

# of uploads :

# of downloads :

Origin country :

n/a

Vendor Threat Intelligence

Detection:

AgentTeslaV2

Link:

https://www.capesandbox.com/analysis/43310/

Detection(s):

SecuriteInfo.com.Fareit-FYE6CF75FA9B14B.3466.UNOFFICIAL

Result

Verdict:

Malware

Maliciousness:

Behaviour

Creating a window

Sending a UDP request

Unauthorized injection to a recently created process

Creating a file

Result

Threat name:

AgentTesla

Detection:

malicious

Classification:

troj.spyw.evad

Score:

92 / 100

Link:

https://www.joesandbox.com/analysis/418668

Signature

.NET source code contains potential unpacker

Injects a PE file into a foreign processes

Machine Learning detection for sample

Queries sensitive BIOS Information (via WMI, Win32_Bios & Win32_BaseBoard, often done to detect virtual machines)

Queries sensitive network adapter information (via WMI, Win32_NetworkAdapter, often done to detect virtual machines)

Tries to detect sandboxes and other dynamic analysis tools (process name or module or function)

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

Tries to harvest and steal ftp login credentials

Tries to steal Mail credentials (via file access)

Yara detected AgentTesla

Yara detected AntiVM_3

Behaviour

Behavior Graph:

Download SVG

Detection:

agenttesla

Link:

https://mwdb.cert.pl/sample/83a4040f51f86dd5a5da772636d1a2271962a87b42994fdaa53438c24b142376/

Threat name:

ByteCode-MSIL.Backdoor.NanoCore

Status:

Malicious

First seen:

2020-08-11 11:50:08 UTC

AV detection:

21 of 29 (72.41%)

Threat level:

5/5

Detection(s):

Malicious file

Link:

https://check.spamhaus.org/check/?searchterm=qosaid2r7bw5ljo2o4tdnunce4mwfkd3ikmu7wvfgq4mesyuen3a._file

Verdict:

unknown

AgentTesla

0b3026ef214d1740de18fa48e13d8c5bddf67737a33fc07eabe0281f88f2ff5d

AgentTesla

2351032596ba226e2ae00a4967cd8f85b158b5b2cfc1869d919bf5a2eea3c129

AgentTesla

7fb9c91eb54a2b4edf3f3ffd386ba95bcae68a086ea82b791a7e59d97107e3e8

AgentTesla

a25ee2ac59e84a1bb440b54b4fde5646c8229ca2b896c99657c995b6fc06fddf

AgentTesla

a733deff759ea8ed7bcb941789e3458cd51b4bb355b66c34a08e3c790ea5f688

AgentTesla

cc6a2ab54544d8044166111bda55ec6273fddbb3132c09fbaaafb5f40b669ebe

AgentTesla

ccc7d187ff725af5867b1358f3324be6155de93ce81079564d1fa22bac501702

AgentTesla

e46cd74bde2954d29d54e90b0103b27c140153f08a9e4a721250112c1fe39a66

AgentTesla

ecb26efe8b9a41b26bd920e537c83517dcc62072ba9675f35511c5fbb7bed6b7

AgentTesla

+ 99 additional samples on MalwareBazaar

Result

Malware family:

agenttesla

Score:

10/10

Tags:

keylogger stealer spyware trojan family:agenttesla

Link:

https://tria.ge/reports/200811-h7zmm9t16e/

Behaviour

Suspicious behavior: EnumeratesProcesses

Suspicious use of AdjustPrivilegeToken

Suspicious use of WriteProcessMemory

Suspicious use of SetThreadContext

Reads data files stored by FTP clients

Reads user/profile data of local email clients

Reads user/profile data of web browsers

AgentTesla Payload

AgentTesla

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

Threat name:

Malicious File

Score:

0.75

Link:

https://yomi.yoroi.company/submissions/83a4040f51f86dd5a5da772636d1a2271962a87b42994fdaa53438c24b142376

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_type2 Create hunting rule
Author:	JPCERT/CC Incident Response Group
Description:	detect Agenttesla in memory
Reference:	internal research

Rule name:	CAP_HookExKeylogger Create hunting rule
Author:	Brian C. Bell -- @biebsmalwareguy
Reference:	https://github.com/DFIRnotes/rules/blob/master/CAP_HookExKeylogger.yar