MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 3c81bde8d413cadc04efa32c2754918d4a1a9c43a60181e7907cca8d31107826. 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: 7

Intelligence 7 IOCs YARA 3 File information Comments

SHA256 hash:	3c81bde8d413cadc04efa32c2754918d4a1a9c43a60181e7907cca8d31107826
SHA3-384 hash:	ee8fe893a75ae4d2c9dd838c9b22166561c2b22459ca02e6da821df085c1b00e5e4f2d88dc36e48a36a34343ccd20a8e
SHA1 hash:	5f9a114d187fc29a625ede422af6662104b5e074
MD5 hash:	7311fd887dc753edf0ebf7d9d9f70fc0
humanhash:	echo-asparagus-foxtrot-steak
File name:	BANK LETTER.exe
Download:	download sample
Signature	AgentTesla Create hunting rule
File size:	433'700 bytes
First seen:	2020-08-04 13:32:14 UTC
Last seen:	Never
File type:	exe
MIME type:	application/x-dosexec
imphash	7c2c71dfce9a27650634dc8b1ca03bf0 (160 x Loki, 58 x Formbook, 55 x Adware.Generic)
ssdeep	12288:Nan0Z2Yi+7d53Do5gFBfUZ3/k59qKUF4z:RZ2YJTgAsZ3qkdq
Threatray	641 similar samples on MalwareBazaar
TLSH	0094236737B0A195EA1201B005FCF6A689D61DAB13D0EF0F97C07FC97471692930E99E
Reporter	abuse_ch
Tags:	AgentTesla exe Hostwinds

abuse_ch

Malspam distributing unidentified malware:

HELO: hwsrv-752042.hostwindsdns.com
Sending IP: 104.168.159.72
From: info@emeanark.com
Subject: Confirm bank letter
Attachment: BANK LETTER.IMG (contains "BANK LETTER.exe")

Intelligence

File Origin

# of uploads :

# of downloads :

Origin country :

n/a

Vendor Threat Intelligence

Detection:

n/a

Link:

https://www.capesandbox.com/analysis/38729/

Detection(s):

PUA.Win.Downloader.Soft32downloader-6691270-0

PUA.Win.Adware.Browserio-6725861-0

SecuriteInfo.com.Artemis162931E90DCF.4593.UNOFFICIAL

Result

Verdict:

Malware

Maliciousness:

Behaviour

Creating a file in the %temp% directory

Creating a file in the %AppData% subdirectories

Launching a process

Sending a UDP request

Creating a window

Transferring files using the Background Intelligent Transfer Service (BITS)

Enabling the 'hidden' option for recently created files

Using the Windows Management Instrumentation requests

Moving a file to the %AppData% subdirectory

Reading critical registry keys

Forced shutdown of a system process

Stealing user critical data

Unauthorized injection to a system process

Enabling autorun by creating a file

Result

Threat name:

AgentTesla

Detection:

malicious

Classification:

troj.spyw.evad

Score:

80 / 100

Link:

https://www.joesandbox.com/analysis/409497

Signature

Found evasive API chain (trying to detect sleep duration tampering with parallel thread)

Installs a global keyboard hook

Maps a DLL or memory area into another process

Overwrites code with unconditional jumps - possibly settings hooks in foreign process

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

Tries to steal Mail credentials (via file access)

Yara detected AgentTesla

Behaviour

Behavior Graph:

Download SVG

Detection:

n/a

Link:

https://mwdb.cert.pl/sample/3c81bde8d413cadc04efa32c2754918d4a1a9c43a60181e7907cca8d31107826/

Threat name:

Win32.Trojan.CryptInject

Status:

Malicious

First seen:

2020-08-04 13:34:06 UTC

AV detection:

20 of 28 (71.43%)

Threat level:

5/5

Detection(s):

Suspicious file

Link:

https://check.spamhaus.org/check/?searchterm=hsa332gucpfnybhpumwcoverrvfbvhcduyaydz4qptfi2miqpata._file

Verdict:

malicious

AgentTesla

0f24e222f76b19a0f1995c70e3711ab2b1c7e3f41c5e915796e767fce361e2e3

AgentTesla

581ccb74a37077703bcc314447ce7dfeec42832bad81225f1be6c214ca9bf51d

AgentTesla

5c63c2887891a56e0465251c8112ce7a07fc70e782dbc2e80f45f670294d4285

AgentTesla

5e23eed104a5bd67c8ae3abe1f3554abac8500bf9f916992df36246b06f14419

AgentTesla

7ef7ff0660d406b237fd3253738d60a294c0273ca1436cf9ba87d5b2ea8d62d8

AgentTesla

9f06ce1718cfa4e73366f82c9488b7a4aad4ddede7d7b3b51d44667607a3961c

AgentTesla

b9d1b551c4bf7bca9c2b2006acaa9b7f4571fa16b469c1bab4d4e260d2a908ad

AgentTesla

c2f42cfcfafad77546d57cbfde6a6f4c1c75d684a81304d1ec901285b1873bd3

AgentTesla

cfd29866a9e618985b15c779e0ac0ad8e09a9e997774c0d2fe18f00f8110a24a

AgentTesla

+ 631 additional samples on MalwareBazaar

Result

Malware family:

n/a

Score:

1/10

Tags:

n/a

Link:

https://tria.ge/reports/200804-awwhf5ktma/

Behaviour

NSIS installer

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

Threat name:

Malicious File

Score:

1.00

Link:

https://yomi.yoroi.company/submissions/3c81bde8d413cadc04efa32c2754918d4a1a9c43a60181e7907cca8d31107826

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