MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 1a5d841876ef1e6ad5a9ff4ff4f8d23687e2e80d62f1386fde805a8653110d98. 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:	1a5d841876ef1e6ad5a9ff4ff4f8d23687e2e80d62f1386fde805a8653110d98
SHA3-384 hash:	e7380c0448b54a8a0b70e9e0e3d3f326572e3a33e216c2f342b67bda1169254cfc31b1e254f2fbae2b62790706a54f6a
SHA1 hash:	8ca8357c6df4db37dacbd3fd3a856df8c4a5d75e
MD5 hash:	a8ae8c4c3d4289178fc6b671222fd9ed
humanhash:	early-ceiling-fillet-golf
File name:	factura de reembolso_274982_copia.pdf.exe
Download:	download sample
Signature	AgentTesla Create hunting rule
File size:	526'336 bytes
First seen:	2020-07-29 10:58:11 UTC
Last seen:	Never
File type:	exe
MIME type:	application/x-dosexec
imphash	f34d5f2d4577ed6d9ceec516c1f5a744 (48'652 x AgentTesla, 19'462 x Formbook, 12'203 x SnakeKeylogger)
ssdeep	12288:DrFRPW7AMS3iFY9Ld1j96loWDcwI+nHRy5:DhResV38wb9IoWDcaHQ
Threatray	10'840 similar samples on MalwareBazaar
TLSH	90B4CF1425A45B1FD31B80B87427E0F02663E4A9EBA1EEB35D8FE0A748D26FD74C3156
Reporter	abuse_ch
Tags:	AgentTesla exe

abuse_ch

Malspam distributing AgentTesla:

HELO: box.deliveriies.com
Sending IP: 146.71.78.63
From: Impuestum Contadores S.A. <impuestumcontadores_s.a@prodi.gob.com>
Subject: Estimado Ciudadano / No Inmigrante
Attachment: factura de reembolso_274982_copia.pdf.z (contains "factura de reembolso_274982_copia.pdf.exe")

AgentTesla SMTP exfil server:
mail.centinelaperu.com.pe:587

Intelligence

File Origin

# of uploads :

# of downloads :

Origin country :

n/a

Vendor Threat Intelligence

Detection:

n/a

Link:

https://www.capesandbox.com/analysis/34774/

Detection(s):

SecuriteInfo.com.MSIL.Kryptik.VFR-1.UNOFFICIAL

Result

Verdict:

Malware

Maliciousness:

Behaviour

Creating a window

Searching for the window

Launching a process

Creating a file

Using the Windows Management Instrumentation requests

Unauthorized injection to a system process

Result

Threat name:

AgentTesla

Detection:

malicious

Classification:

troj.spyw.evad

Score:

100 / 100

Link:

https://www.joesandbox.com/analysis/402313

Signature

Found malware configuration

Initial sample is a PE file and has a suspicious name

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

Tries to steal Mail credentials (via file access)

Uses an obfuscated file name to hide its real file extension (double extension)

Yara detected AgentTesla

Yara detected AntiVM_3

Behaviour

Behavior Graph:

Download SVG

Detection:

agenttesla

Link:

https://mwdb.cert.pl/sample/1a5d841876ef1e6ad5a9ff4ff4f8d23687e2e80d62f1386fde805a8653110d98/

Threat name:

ByteCode-MSIL.Trojan.Kryptik

Status:

Malicious

First seen:

2020-07-29 06:40:51 UTC

AV detection:

24 of 29 (82.76%)

Threat level:

5/5

Detection(s):

Malicious file

Link:

https://check.spamhaus.org/check/?searchterm=djoyigdw54pgvvnj75h7j6gsg2d6f2anmlytq366qbnimuyrbwma._file

Verdict:

malicious

Label(s):

agenttesla

AgentTesla

123e454af642e26f82ecd6fec5b7f3e5a04c015dad7c5880b1101d00ba1c804d

AgentTesla

1d5c4bc37dad083e9b4f2361e6143c4c35ec666913488af8a75ceee52d48f805

AgentTesla

28ea5f3c757973759e967f2a489b85cfad60f620156887145759443b4d673ddf

AgentTesla

3e25dcfcf631e75669420debcbb1f61c2e81fdd195945a69d09e022e2783e401

AgentTesla

6770ffec040c10ed6a13f0e654e9ac96763d3dd9c0c214ce658aa0648367216a

AgentTesla

a4cd48b821c140a3a02f3da126f78d7e465d25e441743c129b925af0065efb52

AgentTesla

bcd7372fd84fe78e97a72a842df6cab2a5d7a47909a3fd05b13f6f4990de8a7f

AgentTesla

c7eaea6b1bb5d064d8db564ca8bb56b940a1f6fd932b75a1934704da667a29c2

AgentTesla

d64ac90e87e3bb79fcf3c6285e9c0060b709ac891efb053c78dad54477135adb

AgentTesla

+ 10'830 additional samples on MalwareBazaar

Result

Malware family:

agenttesla

Score:

10/10

Tags:

spyware keylogger trojan stealer family:agenttesla

Link:

https://tria.ge/reports/200729-hwlvvecy6x/

Behaviour

Suspicious use of WriteProcessMemory

Suspicious use of AdjustPrivilegeToken

Suspicious behavior: EnumeratesProcesses

Suspicious use of SetThreadContext

Reads user/profile data of web browsers

Reads data files stored by FTP clients

Reads user/profile data of local email clients

AgentTesla

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

Threat name:

Kryptik

Score:

1.00

Link:

https://yomi.yoroi.company/submissions/1a5d841876ef1e6ad5a9ff4ff4f8d23687e2e80d62f1386fde805a8653110d98

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