MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 8c3bbac37c8e67896b64efacff85f249aff70a534c4de8fe0b224e7f4b61cc7a. 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: 17

Intelligence 17 IOCs YARA 19 File information Comments

SHA256 hash:	8c3bbac37c8e67896b64efacff85f249aff70a534c4de8fe0b224e7f4b61cc7a
SHA3-384 hash:	6006f7e3f5aa9ba035d0a5c7cdc80cc0856780c2cbf9e8d1c830b9d4544e6a522bdcfa645494a70a9c66ea0f7ccfb8ab
SHA1 hash:	842e9ada8ef24702cc634832d49d36935c562ceb
MD5 hash:	728705310f86c7631569658cd576c431
humanhash:	spring-mississippi-black-mars
File name:	SHIPPING DOCUMENTS.exe
Download:	download sample
Signature	Formbook Create hunting rule
File size:	688'640 bytes
First seen:	2024-05-14 10:40:48 UTC
Last seen:	Never
File type:	exe
MIME type:	application/x-dosexec
imphash	f34d5f2d4577ed6d9ceec516c1f5a744 (48'740 x AgentTesla, 19'604 x Formbook, 12'241 x SnakeKeylogger)
ssdeep	12288:GQaIaQJxAIWD+3HQyf+zMIr4MGaX3HloPmAGbW4D99WN:GwaWxAI9XQY+zFriahvD2
TLSH	T16DE423A092FBC597F6085FF1293BD5616B3AC6E7270EC24E1CD10B7426C171981E32AE
TrID	71.1% (.EXE) Generic CIL Executable (.NET, Mono, etc.) (73123/4/13) 10.2% (.EXE) Win64 Executable (generic) (10523/12/4) 6.3% (.DLL) Win32 Dynamic Link Library (generic) (6578/25/2) 4.3% (.EXE) Win32 Executable (generic) (4504/4/1) 2.0% (.ICL) Windows Icons Library (generic) (2059/9)
File icon (PE):
dhash icon	30f0ccc0d0d0ccc4 (7 x AgentTesla, 2 x Formbook)
Reporter	adrian__luca
Tags:	exe FormBook

Intelligence

File Origin

# of uploads :

# of downloads :

321

Origin country :

Vendor Threat Intelligence

Malware family:

agenttesla

ID:

File name:

8c3bbac37c8e67896b64efacff85f249aff70a534c4de8fe0b224e7f4b61cc7a.exe

Verdict:

Malicious activity

Analysis date:

2024-05-14 11:06:15 UTC

Tags:

evasion stealer agenttesla exfiltration

Link:

https://app.any.run/tasks/f22ec9c4-c54d-4b38-b4df-3f21b965fd5a

Note:

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

Detection(s):

Win.Packed.Remcos-10029827-0

Gathering data

Result

Verdict:

Malware

Maliciousness:

Behaviour

Creating a window

Creating a file in the %AppData% directory

Enabling the 'hidden' option for recently created files

Adding an access-denied ACE

Сreating synchronization primitives

Creating a process with a hidden window

Creating a file in the %temp% directory

Launching a process

Unauthorized injection to a recently created process

Restart of the analyzed sample

Creating a file

Using the Windows Management Instrumentation requests

DNS request

Connection attempt

Sending a custom TCP request

Sending an HTTP GET request

Adding an exclusion to Microsoft Defender

Enabling autorun by creating a file

Verdict:

Likely Malicious

Threat level:

7.5/10

Confidence:

100%

Tags:

masquerade packed remcos

Link:

https://www.filescan.io/uploads/66433fe1a82a5106c5fea9ff/reports/4db9e3ee-87e4-43b8-9aad-7aed5304db83/overview

Verdict:

Malicious

Labled as:

Trojan.Generic

Link:

https://www.hybrid-analysis.com/sample/8c3bbac37c8e67896b64efacff85f249aff70a534c4de8fe0b224e7f4b61cc7a

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/b5892e73-2918-43ca-9a83-5b2ef9b7c5bc

Result

Threat name:

AgentTesla, PureLog Stealer

Detection:

malicious

Classification:

troj.spyw.evad

Score:

100 / 100

Link:

https://www.joesandbox.com/analysis/1441272

Signature

.NET source code contains method to dynamically call methods (often used by packers)

.NET source code contains potential unpacker

Adds a directory exclusion to Windows Defender

Check if machine is in data center or colocation facility

Contains functionality to check if a debugger is running (CheckRemoteDebuggerPresent)

Contains functionality to log keystrokes (.Net Source)

Found malware configuration

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

Initial sample is a PE file and has a suspicious name

Injects a PE file into a foreign processes

Loading BitLocker PowerShell Module

Machine Learning detection for dropped file

Machine Learning detection for sample

Malicious sample detected (through community Yara rule)

Multi AV Scanner detection for dropped file

Multi AV Scanner detection for submitted file

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

Sigma detected: Powershell Base64 Encoded MpPreference Cmdlet

Sigma detected: Scheduled temp file as task from temp location

Snort IDS alert for network traffic

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 / registry access)

Uses schtasks.exe or at.exe to add and modify task schedules

Yara detected AgentTesla

Yara detected AntiVM3

Yara detected Generic Downloader

Yara detected PureLog Stealer

Behaviour

Behavior Graph:

Download SVG

Score:

100%

Verdict:

Malware

File Type:

Link:

https://malprob.io/report/8c3bbac37c8e67896b64efacff85f249aff70a534c4de8fe0b224e7f4b61cc7a

Detection:

agenttesla

Link:

https://mwdb.cert.pl/sample/8c3bbac37c8e67896b64efacff85f249aff70a534c4de8fe0b224e7f4b61cc7a/

Threat name:

ByteCode-MSIL.Spyware.Negasteal

Status:

Malicious

First seen:

2024-05-10 05:18:54 UTC

File Type:

PE (.Net Exe)

Extracted files:

AV detection:

23 of 24 (95.83%)

Threat level:

2/5

Detection(s):

Malicious file

Link:

https://check.spamhaus.org/check/?searchterm=rq53vq34rztys23e56wp7bpsjgx7ocstjrg6r7qlejhh6s3bzr5a._file

Result

Malware family:

agenttesla

Score:

10/10

Tags:

family:agenttesla execution keylogger persistence spyware stealer trojan

Link:

https://tria.ge/reports/240514-mq6dwacc5x/

Behaviour

Creates scheduled task(s)

Suspicious behavior: EnumeratesProcesses

Suspicious use of AdjustPrivilegeToken

Suspicious use of WriteProcessMemory

Enumerates physical storage devices

Suspicious use of SetThreadContext

Adds Run key to start application

Looks up external IP address via web service

Checks computer location settings

Reads WinSCP keys stored on the system

Reads data files stored by FTP clients

Reads user/profile data of local email clients

Reads user/profile data of web browsers

Command and Scripting Interpreter: PowerShell

AgentTesla

Unpacked files

SH256 hash:

86e27e59147c8cddae6976a6a611f1f5f55a0ee292c582ca96e9a28c2ac6021f

MD5 hash:

0cbd7ce92a099aa3ca70315d629ba675

SHA1 hash:

f121824e3e3aa8f719407331973e4f3679d005d9

Link:

https://www.unpac.me/results/acb3b81a-1268-4d38-bfde-12e5c63e0ed0/

SH256 hash:

5ebf819cb925c692af0dd37da8c7bce03924989a9bcd51de3f61f1fd6abaae64

MD5 hash:

04d82fa78537ee0689a7a7a89833a60a

SHA1 hash:

bb24c180e323066ba3d72dcb2c315b204b009733

Detections:

AgentTesla

win_agent_tesla_g2

INDICATOR_SUSPICIOUS_EXE_Referenfces_File_Transfer_Clients

Agenttesla_type2

INDICATOR_SUSPICIOUS_Binary_References_Browsers

INDICATOR_SUSPICIOUS_EXE_VaultSchemaGUID

INDICATOR_SUSPICIOUS_EXE_References_Messaging_Clients

INDICATOR_SUSPICIOUS_EXE_SandboxHookingDLL

INDICATOR_EXE_Packed_GEN01

INDICATOR_SUSPICIOUS_EXE_References_Confidential_Data_Store

Link:

https://www.unpac.me/results/acb3b81a-1268-4d38-bfde-12e5c63e0ed0/

Parent samples :

65b79e68d650ab1f2d6fc5d048b27bc44d54e5cb8f310932b3e18d034ecd234a
fd6a3ae35b309594eff6b53d3172a1d648a66fbca71fd8438d61d1c5c352a1f6
27ac3f8a2082fcd8246bff0281e760d36edcaef16ef2831d14138b8df82ab86f
8c3bbac37c8e67896b64efacff85f249aff70a534c4de8fe0b224e7f4b61cc7a

SH256 hash:

4909093c1045073940daf73778f88ce3e5d4dcbc0d69e3498ad4672c2e699013

MD5 hash:

28b43a10958caef0465f7b93be0a0d77

SHA1 hash:

9c85c1cb7f6face0a6c8d0a2d2314a99092d6554

Link:

https://www.unpac.me/results/acb3b81a-1268-4d38-bfde-12e5c63e0ed0/

SH256 hash:

b61b329b3b25811b2848bf1bdce8a1ade665d37f651fbd5ba81db24645e40ffa

MD5 hash:

8b623647bfa41d6abdb48b28ef4d2a26

SHA1 hash:

1f0a34efe7de31997e5b624684fa895fb8bea41d

Link:

https://www.unpac.me/results/acb3b81a-1268-4d38-bfde-12e5c63e0ed0/

SH256 hash:

8c3bbac37c8e67896b64efacff85f249aff70a534c4de8fe0b224e7f4b61cc7a

MD5 hash:

728705310f86c7631569658cd576c431

SHA1 hash:

842e9ada8ef24702cc634832d49d36935c562ceb

Link:

https://www.unpac.me/results/acb3b81a-1268-4d38-bfde-12e5c63e0ed0/

Malware family:

AgentTesla

Verdict:

Malicious

Link:

https://www.vmray.com/analyses/_mb/8c3bbac37c8e/report/overview.html

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/8c3bbac37c8e67896b64efacff85f249aff70a534c4de8fe0b224e7f4b61cc7a

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:	AgentTeslaV3 Create hunting rule
Author:	ditekshen
Description:	AgentTeslaV3 infostealer payload

Rule name:	AgentTeslaV5 Create hunting rule
Author:	ClaudioWayne
Description:	AgentTeslaV5 infostealer payload

Rule name:	Agenttesla_type2 Create hunting rule
Author:	JPCERT/CC Incident Response Group
Description:	detect Agenttesla in memory
Reference:	internal research

Rule name:	DebuggerCheck__RemoteAPI Create hunting rule
Reference:	https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara

Rule name:	INDICATOR_EXE_Packed_GEN01 Create hunting rule
Author:	ditekSHen
Description:	Detect packed .NET executables. Mostly AgentTeslaV4.

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_EXE_SandboxHookingDLL Create hunting rule
Author:	ditekSHen
Description:	Detects binaries and memory artifacts referencing sandbox DLLs typically observed in sandbox evasion

Rule name:	INDICATOR_SUSPICIOUS_EXE_VaultSchemaGUID Create hunting rule
Author:	ditekSHen
Description:	Detects executables referencing Windows vault credential objects. Observed in infostealers

Rule name:	malware_Agenttesla_type2 Create hunting rule
Author:	JPCERT/CC Incident Response Group
Description:	detect Agenttesla in memory
Reference:	internal research

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:	pe_imphash Create hunting rule

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

Rule name:	Windows_Trojan_AgentTesla_ebf431a8 Create hunting rule
Author:	Elastic Security
Reference:	https://www.elastic.co/security-labs/attack-chain-leads-to-xworm-and-agenttesla

File information

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

Malspam

Formbook

exe 8c3bbac37c8e67896b64efacff85f249aff70a534c4de8fe0b224e7f4b61cc7a

(this sample)

Delivery method

Distributed via e-mail attachment

BLint

The following table provides more information about this file using BLint. BLint is a Binary Linter to check the security properties, and capabilities in executables.

Findings

ID	Title	Severity
CHECK_AUTHENTICODE	Missing Authenticode	high
CHECK_DLL_CHARACTERISTICS	Missing dll Security Characteristics (HIGH_ENTROPY_VA)	high

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