MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 21c9667dcddcfb555bc6cc73b3727585fedb655aef388a99a509840a5f8036fb. 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: 19

Intelligence 19 IOCs YARA 19 File information Comments

SHA256 hash:	21c9667dcddcfb555bc6cc73b3727585fedb655aef388a99a509840a5f8036fb
SHA3-384 hash:	6bec797b702ff16b0a64be5c480b25da6da38050bac5c99bf01e06debdb7a728cf4f6cdef18ff734b5e772a18eb2d0bf
SHA1 hash:	8b76b5ae47786beedb0699d7a6719936559196d1
MD5 hash:	598a70d0d7e7c1a7478c5451ce4939cb
humanhash:	four-beer-thirteen-december
File name:	21c9667dcddcfb555bc6cc73b3727585fedb655aef388a99a509840a5f8036fb
Download:	download sample
Signature	AgentTesla Create hunting rule
File size:	738'816 bytes
First seen:	2025-03-10 12:09:57 UTC
Last seen:	2025-03-10 13:10:15 UTC
File type:	exe
MIME type:	application/x-dosexec
imphash	f34d5f2d4577ed6d9ceec516c1f5a744 (48'746 x AgentTesla, 19'628 x Formbook, 12'242 x SnakeKeylogger)
ssdeep	12288:Z383le9cidP64Qx3TZB9jtEDWXgbXev3YkQgWzO00CgmASIZ6RcXC5CZJm3Ar:h3PPkxjZrjtLXuevsRzO0JuZMMhmQr
TLSH	T197F401583618E803D99522F80AB1F1B507B95DEEA911D3D79FEA7DEFB8E1F101A40183
TrID	71.1% (.EXE) Generic CIL Executable (.NET, Mono, etc.) (73123/4/13) 10.2% (.EXE) Win64 Executable (generic) (10522/11/4) 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)
Magika	pebin
dhash icon	d4cc86d4f29ec4d4 (9 x Formbook, 4 x MassLogger, 3 x Loki)
Reporter	adrian__luca
Tags:	AgentTesla exe

Intelligence

File Origin

# of uploads :

# of downloads :

349

Origin country :

Vendor Threat Intelligence

Malware family:

agenttesla

ID:

File name:

21c9667dcddcfb555bc6cc73b3727585fedb655aef388a99a509840a5f8036fb

Verdict:

Malicious activity

Analysis date:

2025-03-10 18:23:06 UTC

Tags:

evasion stealer ultravnc rmm-tool agenttesla smtp

Link:

https://app.any.run/tasks/345f1dc7-bbd3-4a8e-bde0-4580465abc3a

Note:

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

Verdict:

Malicious

Score:

99.1%

Link:

https://cyber-fortress.com/docs/result/index.php?id=67cee5180d1b39e3a208bb16

Tags:

virus micro msil

Result

Verdict:

Malware

Maliciousness:

Behaviour

Searching for the window

Creating a window

Сreating synchronization primitives

Creating a file in the %AppData% directory

Enabling the 'hidden' option for recently created files

Adding an access-denied ACE

Creating a process with a hidden window

Creating a file in the %temp% directory

Launching a process

Creating a file

Using the Windows Management Instrumentation requests

Adding an exclusion to Microsoft Defender

Enabling autorun by creating a file

Unauthorized injection to a system process

Verdict:

Likely Malicious

Threat level:

7.5/10

Confidence:

100%

Tags:

obfuscated packed packed packer_detected vbnet

Link:

https://www.filescan.io/uploads/67ced6b3f8726576332ec7ca/reports/8a75e2ad-570c-4952-87a4-ac27be819b55/overview

Verdict:

Malicious

Labled as:

Trojan.Generic

Link:

https://www.hybrid-analysis.com/sample/21c9667dcddcfb555bc6cc73b3727585fedb655aef388a99a509840a5f8036fb

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/a702c9ce-42ec-44c3-9a76-f9583ddfc780

Result

Threat name:

AgentTesla

Detection:

malicious

Classification:

spre.troj.spyw.evad

Score:

100 / 100

Link:

https://www.joesandbox.com/analysis/1634573

Signature

.NET source code contains potential unpacker

Adds a directory exclusion to Windows Defender

Allocates memory in foreign processes

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

Injects a PE file into a foreign processes

Joe Sandbox ML detected suspicious sample

Loading BitLocker PowerShell Module

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)

Queries sensitive video device information (via WMI, Win32_VideoController, often done to detect virtual machines)

Sigma detected: MSBuild connects to smtp port

Sigma detected: Powershell Base64 Encoded MpPreference Cmdlet

Sigma detected: Scheduled temp file as task from temp location

Sigma detected: Silenttrinity Stager Msbuild Activity

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

Writes to foreign memory regions

Yara detected AgentTesla

Yara detected AntiVM3

Behaviour

Behavior Graph:

Download SVG

Score:

100%

Verdict:

Malware

File Type:

Link:

https://malprob.io/report/21c9667dcddcfb555bc6cc73b3727585fedb655aef388a99a509840a5f8036fb

Detection:

agenttesla

Link:

https://mwdb.cert.pl/sample/21c9667dcddcfb555bc6cc73b3727585fedb655aef388a99a509840a5f8036fb/

Threat name:

ByteCode-MSIL.Backdoor.FormBook

Status:

Malicious

First seen:

2025-02-26 02:54:55 UTC

File Type:

PE (.Net Exe)

Extracted files:

AV detection:

25 of 38 (65.79%)

Threat level:

5/5

Detection(s):

Malicious file

Link:

https://check.spamhaus.org/check/?searchterm=ehewm7on3t5vkw6gzrz3g4tvqx7nwzk2544ivgnfbgcaux4ag35q._file

Verdict:

malicious

Label(s):

unc_loader_037

agenttesla

Similar samples:

error

AgentTesla

Result

Malware family:

agenttesla

Score:

10/10

Tags:

family:agenttesla discovery execution keylogger spyware stealer trojan

Link:

https://tria.ge/reports/250310-pb6gfatyey/

Behaviour

Scheduled Task/Job: Scheduled Task

Suspicious behavior: EnumeratesProcesses

Suspicious use of AdjustPrivilegeToken

Suspicious use of WriteProcessMemory

Enumerates physical storage devices

System Location Discovery: System Language Discovery

Suspicious use of SetThreadContext

Looks up external IP address via web service

Checks computer location settings

Command and Scripting Interpreter: PowerShell

AgentTesla

Agenttesla family

Verdict:

Malicious

Tags:

external_ip_lookup

YARA:

n/a

Link:

https://app.threat.zone/submission/88da388b-696a-438e-abaa-a3e530721164

Unpacked files

SH256 hash:

21c9667dcddcfb555bc6cc73b3727585fedb655aef388a99a509840a5f8036fb

MD5 hash:

598a70d0d7e7c1a7478c5451ce4939cb

SHA1 hash:

8b76b5ae47786beedb0699d7a6719936559196d1

Link:

https://www.unpac.me/results/c4ee0040-42ef-408b-9d39-c4331346e3d8/

SH256 hash:

fced472f9b70065ee0b6c0df856956ff0e19ca30355161296d3aea4dbc83da74

MD5 hash:

107ca6b3b58b46f14fe70bb7c771f31a

SHA1 hash:

6e2d4d16aba65c11fac16b7d145a368bbec60ef9

Detections:

SUSP_OBF_NET_ConfuserEx_Name_Pattern_Jan24

SUSP_OBF_NET_Reactor_Indicators_Jan24

Link:

https://www.unpac.me/results/c4ee0040-42ef-408b-9d39-c4331346e3d8/

SH256 hash:

05a6d5f4726b3729f5958424a01d9a2033857c4381baee62a004a1241fb70cd1

MD5 hash:

eaf07392f2fad2e065b9e7f2399e5b72

SHA1 hash:

7a969669c8e2e0485d2840a3c89d98179ec4f9e5

Link:

https://www.unpac.me/results/c4ee0040-42ef-408b-9d39-c4331346e3d8/

SH256 hash:

191236e754292067c955beb22917d157b38067cecfb311841dedc9fa09045b8b

MD5 hash:

b4335bccdc3d83a0a7217c90ccc8f8ed

SHA1 hash:

e7ae282dda6784eb3517047cc475e73ff72b5cce

Detections:

win_agent_tesla_g2

AgentTesla

INDICATOR_EXE_Packed_GEN01

INDICATOR_SUSPICIOUS_EXE_SandboxHookingDLL

INDICATOR_SUSPICIOUS_Binary_References_Browsers

INDICATOR_SUSPICIOUS_EXE_References_Confidential_Data_Store

INDICATOR_SUSPICIOUS_EXE_References_Messaging_Clients

INDICATOR_SUSPICIOUS_EXE_Referenfces_File_Transfer_Clients

INDICATOR_SUSPICIOUS_EXE_VaultSchemaGUID

Agenttesla_type2

Link:

https://www.unpac.me/results/c4ee0040-42ef-408b-9d39-c4331346e3d8/

Parent samples :
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Malware family:

AgentTesla

Verdict:

Malicious

Link:

https://www.vmray.com/analyses/_mb/21c9667dcddc/report/overview.html

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

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:	Sus_Obf_Enc_Spoof_Hide_PE Create hunting rule
Author:	XiAnzheng
Description:	Check for Overlay, Obfuscating, Encrypting, Spoofing, Hiding, or Entropy Technique(can create FP)

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 (GUARD_CF)	high

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