MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 f2caa2b831daf0bd709c35971d82b1f61be6f8fbf36eac0daf0cf5edd7345852. 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 17 File information Comments

SHA256 hash:	f2caa2b831daf0bd709c35971d82b1f61be6f8fbf36eac0daf0cf5edd7345852
SHA3-384 hash:	58eab5a7606c48d8fb5ccbde0370f4def8d32ea908d1b02c4f3a4d1c71a78e6d73355e78864b18a43b0dd803961b9439
SHA1 hash:	ddbbca2f93ec0cdaea257228a904ea33cd8f6bcb
MD5 hash:	90a7b0b1bc8a8f70351048fc914f1375
humanhash:	mars-music-seven-gee
File name:	BID DOCUMENTS.exe
Download:	download sample
Signature	AgentTesla Create hunting rule
File size:	1'768'440 bytes
First seen:	2024-06-19 16:00:57 UTC
Last seen:	2024-06-19 16:18:52 UTC
File type:	exe
MIME type:	application/x-dosexec
ssdeep	12288:O4pIrYlQ2aPCip8PFBhooDlpgSO4KGO1B5ogezurnc5WdFE2iy:7p4IY2lokvg3GO1cHsnV1
TLSH	T1D485225074874EABFE965634E2D2B4F001FC7E8370F0A62FDF989E052505A3C5789AB9
TrID	44.4% (.EXE) Win64 Executable (generic) (10523/12/4) 21.3% (.EXE) Win16 NE executable (generic) (5038/12/1) 8.7% (.ICL) Windows Icons Library (generic) (2059/9) 8.5% (.EXE) OS/2 Executable (generic) (2029/13) 8.4% (.EXE) Generic Win/DOS Executable (2002/3)
Reporter	lowmal3
Tags:	AgentTesla exe

Intelligence

File Origin

# of uploads :

# of downloads :

393

Origin country :

Vendor Threat Intelligence

Malware family:

agenttesla

ID:

File name:

f2caa2b831daf0bd709c35971d82b1f61be6f8fbf36eac0daf0cf5edd7345852.exe

Verdict:

Malicious activity

Analysis date:

2024-06-19 16:03:05 UTC

Tags:

smtp agenttesla stealer

Link:

https://app.any.run/tasks/2a283974-1c6c-4bf3-ae3a-caa48fbb984b

Note:

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

Detection(s):

SecuriteInfo.com.Win64.PWSX-gen.16106.11470.UNOFFICIAL

Verdict:

Malicious

Score:

81.4%

Link:

https://cyber-fortress.com/docs/result/index.php?id=6673020789a0563951ff9579win7simulatehigh_evasion

Tags:

Encryption Generic Gensteal

Result

Verdict:

Malware

Maliciousness:

Behaviour

Searching for the window

Launching a process

Searching for synchronization primitives

Launching the default Windows debugger (dwwin.exe)

Using the Windows Management Instrumentation requests

Reading critical registry keys

DNS request

Connection attempt

Sending a custom TCP request

Sending an HTTP GET request

Creating a window

Forced shutdown of a system process

Stealing user critical data

Unauthorized injection to a system process

Verdict:

Suspicious

Threat level:

5/10

Confidence:

100%

Tags:

overlay

Link:

https://www.filescan.io/uploads/667300c40bf5978c0b109eaa/reports/25c89890-4d4b-43ca-8805-a081468fbc2c/overview

Verdict:

Malicious

Labled as:

Win/malicious_confidence_100%

Link:

https://www.hybrid-analysis.com/sample/f2caa2b831daf0bd709c35971d82b1f61be6f8fbf36eac0daf0cf5edd7345852

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/9d491ae0-8f0c-4c87-877f-e7f0b1d155fc

Result

Threat name:

AgentTesla

Detection:

malicious

Classification:

spre.troj.spyw.expl.evad

Score:

100 / 100

Link:

https://www.joesandbox.com/analysis/1459635

Signature

.NET source code references suspicious native API functions

AI detected suspicious sample

Allocates memory in foreign processes

Contains functionality to log keystrokes (.Net Source)

Found malware configuration

Initial sample is a PE file and has a suspicious name

Injects a PE file into a foreign processes

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)

Sigma detected: MSBuild connects to smtp port

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)

Writes to foreign memory regions

Yara detected AgentTesla

Yara detected AntiVM3

Yara detected UAC Bypass using CMSTP

Behaviour

Behavior Graph:

Download SVG

Score:

99%

Verdict:

Malware

File Type:

Link:

https://malprob.io/report/f2caa2b831daf0bd709c35971d82b1f61be6f8fbf36eac0daf0cf5edd7345852

Detection:

agenttesla

Link:

https://mwdb.cert.pl/sample/f2caa2b831daf0bd709c35971d82b1f61be6f8fbf36eac0daf0cf5edd7345852/

Threat name:

ByteCode-MSIL.Trojan.AgentTesla

Status:

Malicious

First seen:

2024-06-19 13:06:32 UTC

File Type:

PE+ (.Net Exe)

Extracted files:

AV detection:

22 of 24 (91.67%)

Threat level:

5/5

Detection(s):

Malicious file

Link:

https://check.spamhaus.org/check/?searchterm=6lfkfobr3lyl24e4gwlr3avr6yn6n6h36nxkydnpbt263vzulbja._file

Verdict:

malicious

Result

Malware family:

agenttesla

Score:

10/10

Tags:

family:agenttesla keylogger spyware stealer trojan

Link:

https://tria.ge/reports/240619-tf7mhsxgkp/

Behaviour

Suspicious behavior: EnumeratesProcesses

Suspicious use of AdjustPrivilegeToken

Suspicious use of WriteProcessMemory

Suspicious use of SetThreadContext

AgentTesla

Verdict:

Suspicious

Tags:

n/a

YARA:

n/a

Link:

https://app.threat.zone/submission/96440f5d-801f-4b68-8174-e004b0e87b69

Unpacked files

SH256 hash:

f2caa2b831daf0bd709c35971d82b1f61be6f8fbf36eac0daf0cf5edd7345852

MD5 hash:

90a7b0b1bc8a8f70351048fc914f1375

SHA1 hash:

ddbbca2f93ec0cdaea257228a904ea33cd8f6bcb

Link:

https://www.unpac.me/results/6e53ac1a-be74-4786-960b-420845daaf2c/

Malware family:

AgentTesla

Verdict:

Malicious

Link:

https://www.vmray.com/analyses/_mb/f2caa2b831da/report/overview.html

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

Threat name:

AgentTesla

Score:

0.90

Link:

https://yomi.yoroi.company/submissions/f2caa2b831daf0bd709c35971d82b1f61be6f8fbf36eac0daf0cf5edd7345852

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:	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_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:	pe_no_import_table Create hunting rule
Description:	Detect pe file that no import table

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

Rule name:	Windows_Generic_Threat_9f4a80b2 Create hunting rule
Author:	Elastic Security

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

AgentTesla

exe f2caa2b831daf0bd709c35971d82b1f61be6f8fbf36eac0daf0cf5edd7345852

(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 (GUARD_CF)	high

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