MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 18bb8b44a363513d2359eaf430f2e0a1559b6405d66269f4a77c3d052cfe01a9. 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: 19

Intelligence 19 IOCs YARA 18 File information Comments

SHA256 hash:	18bb8b44a363513d2359eaf430f2e0a1559b6405d66269f4a77c3d052cfe01a9
SHA3-384 hash:	b25dcd98b964bef7c08739392066118254ac465187e7802edcab3b6299eccd2f7d05f32ea8555a51c4f56cfb9ca1c21a
SHA1 hash:	a543433469898da17bf5599c0e45cd8e559e344f
MD5 hash:	71813501b8b4a01c69cd70546704265a
humanhash:	saturn-uniform-massachusetts-network
File name:	18bb8b44a363513d2359eaf430f2e0a1559b6405d66269f4a77c3d052cfe01a9
Download:	download sample
Signature	Formbook Create hunting rule
File size:	499'200 bytes
First seen:	2024-06-03 12:27:54 UTC
Last seen:	2024-06-03 13:29:39 UTC
File type:	exe
MIME type:	application/x-dosexec
imphash	f34d5f2d4577ed6d9ceec516c1f5a744 (48'666 x AgentTesla, 19'479 x Formbook, 12'209 x SnakeKeylogger)
ssdeep	12288:YsCXU8IKYK5gJJQMu9lQpCaCWekMIEpabvfvZ4fa:8AQM6lQ0aCWXDqaDXZ4fa
Threatray	4'058 similar samples on MalwareBazaar
TLSH	T1FDB4E046D58904CDEC42263888291F38453E5EE50D72A2DAB3FFB857CDBDB138B185E9
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	06070733333b1b06 (3 x Formbook, 1 x AgentTesla)
Reporter	adrian__luca
Tags:	exe FormBook

Intelligence

File Origin

# of uploads :

# of downloads :

342

Origin country :

Vendor Threat Intelligence

Malware family:

agenttesla

ID:

File name:

18bb8b44a363513d2359eaf430f2e0a1559b6405d66269f4a77c3d052cfe01a9.exe

Verdict:

Malicious activity

Analysis date:

2024-06-03 12:43:05 UTC

Tags:

evasion agenttesla stealer smtp

Link:

https://app.any.run/tasks/87c9565f-a374-4b95-bdc5-43dd636f50e4

Note:

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

Detection(s):

SecuriteInfo.com.Win32.PWSX-gen.5957.28543.UNOFFICIAL

Verdict:

Malicious

Score:

96.5%

Link:

https://cyber-fortress.com/docs/result/index.php?id=665e2432ab69e84d6a2f4730win7simulatehigh_evasion

Tags:

Generic Network Msil

Result

Verdict:

Malware

Maliciousness:

Behaviour

Launching a process

Creating a window

Using the Windows Management Instrumentation requests

Creating a file

Сreating synchronization primitives

DNS request

Connection attempt

Sending a custom TCP request

Sending an HTTP GET request

Reading critical registry keys

Stealing user critical data

Unauthorized injection to a system process

Verdict:

Likely Malicious

Threat level:

7.5/10

Confidence:

100%

Tags:

packed zusy

Link:

https://www.filescan.io/uploads/665db6d621581a92819a1d7b/reports/9d718763-faf7-4b17-902c-d61da2411636/overview

Verdict:

Malicious

Labled as:

Trojan.GenKryptik

Link:

https://www.hybrid-analysis.com/sample/18bb8b44a363513d2359eaf430f2e0a1559b6405d66269f4a77c3d052cfe01a9

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/03459beb-f293-46dd-b20c-6458a975972c

Result

Threat name:

AgentTesla

Detection:

malicious

Classification:

troj.spyw.evad

Score:

100 / 100

Link:

https://www.joesandbox.com/analysis/1451028

Signature

.NET source code contains potential unpacker

.NET source code references suspicious native API functions

AI detected suspicious sample

Antivirus / Scanner detection for submitted sample

Antivirus detection for URL or domain

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

Installs a global keyboard hook

Loading BitLocker PowerShell Module

Machine Learning detection for sample

Malicious sample detected (through community Yara rule)

Multi AV Scanner detection for submitted file

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 steal Mail credentials (via file / registry access)

Yara detected AgentTesla

Yara detected Generic Downloader

Behaviour

Behavior Graph:

Download SVG

Score:

100%

Verdict:

Malware

File Type:

Link:

https://malprob.io/report/18bb8b44a363513d2359eaf430f2e0a1559b6405d66269f4a77c3d052cfe01a9

Detection:

agenttesla

Link:

https://mwdb.cert.pl/sample/18bb8b44a363513d2359eaf430f2e0a1559b6405d66269f4a77c3d052cfe01a9/

Threat name:

ByteCode-MSIL.Spyware.Negasteal

Status:

Malicious

First seen:

2024-05-09 02:39:37 UTC

File Type:

PE (.Net Exe)

Extracted files:

AV detection:

19 of 38 (50.00%)

Threat level:

2/5

Detection(s):

Malicious file

Link:

https://check.spamhaus.org/check/?searchterm=dc5ywrfdmnit2i2z5l2db4xaufkzwzaf2zrgt5fhpq6qklh6aguq._file

Verdict:

malicious

Label(s):

agenttesla_v4

agenttesla

Formbook

5a9523bba8e40c9d642fd99e046c4c06ddb7174cb26da584ccc0db4aea139f87

Formbook

5c7c411ea48976a55a30558e1ce6147a7f28b6b99d84083e1f01de1db86bb588

Formbook

9590e1d446b60f2a62ed6e543d623a857061ca1e80a2a499a9ef7d6c97cc5cb5

Formbook

c177812f5ee5c7643659dba85dcdb7d86134d2a437a8c7934c9b63eb3a5b4530

Formbook

c907b5ee8b9aae5ad661042f2aed0338df90653b95dad072ef8d8c0b582bc46b

Formbook

+ 4'048 additional samples on MalwareBazaar

Result

Malware family:

agenttesla

Score:

10/10

Tags:

family:agenttesla keylogger spyware stealer trojan

Link:

https://tria.ge/reports/240603-pnbslaed5t/

Behaviour

Suspicious behavior: EnumeratesProcesses

Suspicious use of AdjustPrivilegeToken

Suspicious use of SetWindowsHookEx

Suspicious use of WriteProcessMemory

Suspicious use of SetThreadContext

Looks up external IP address via web service

AgentTesla

Verdict:

Suspicious

Tags:

n/a

YARA:

n/a

Link:

https://app.threat.zone/submission/b17cf5b3-f486-4fd4-8b9c-7dc30bd8cb51

Unpacked files

SH256 hash:

f8d90d67907fd4f6d0fd054e52f462b9751dfbcafc773ac10e7769216cceaf9d

MD5 hash:

ae84db497e0ed1453a32f4d5e56d3825

SHA1 hash:

e62d1e46b022abee7ab7e0d68cec08b260e373ec

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/bb827134-5b0c-4663-8fe6-5d3a7fb35a61/

Parent samples :

99677c9af723d0773f67fe035205dbbd9d857022b1619fc33fd83808072d2caa
16043cbb08a362ab425145ded9447bcc382c2b9c9eb3b570704edabbe4276fea
38e5e3e1fc431520dbf8944828ad847ea054ea8ffda2f579e2c29bc53a84f94a
d1b0b9a6b80f54be2a14ff19f3bd682185848d92443fa555a08cb07fa630a230
0f0b721073a35fe3e6b37d75582704acd5bdc1b3d71343e74d6fec59ac932deb
9b6fc00623210be4340042bb63c2e7d674cb62de15d8d296ac93a6ad57e78984
18bb8b44a363513d2359eaf430f2e0a1559b6405d66269f4a77c3d052cfe01a9

SH256 hash:

436d05543d9313bc385011cf373cc86855cea1c9a0c0c6fbadb08b2ece5ed0d0

MD5 hash:

c0bb8e7f195845de6a221278386b9209

SHA1 hash:

cb16e8b951ee2f32c3506ee6621c436c5cc1bb85

Link:

https://www.unpac.me/results/bb827134-5b0c-4663-8fe6-5d3a7fb35a61/

SH256 hash:

966e4849b562728bff4bbd69fadc2a566899a3d983a7ff5304e72ecf6cfcd772

MD5 hash:

55857f507f2e6dace00eafaac0391548

SHA1 hash:

1dbfdcd721d24918aae25344bc8b715405702aba

Link:

https://www.unpac.me/results/bb827134-5b0c-4663-8fe6-5d3a7fb35a61/

SH256 hash:

18bb8b44a363513d2359eaf430f2e0a1559b6405d66269f4a77c3d052cfe01a9

MD5 hash:

71813501b8b4a01c69cd70546704265a

SHA1 hash:

a543433469898da17bf5599c0e45cd8e559e344f

Link:

https://www.unpac.me/results/bb827134-5b0c-4663-8fe6-5d3a7fb35a61/

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

Threat name:

iSpy Keylogger

Score:

1.00

Link:

https://yomi.yoroi.company/submissions/18bb8b44a363513d2359eaf430f2e0a1559b6405d66269f4a77c3d052cfe01a9

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:	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.

No further information available

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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