MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 bbff2bce7c553d1e11b48a38bfd351f9e715b683171f596751d78ace10782e79. 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: 13

Maldoc score: 11

Intelligence 13 IOCs YARA 14 File information Comments

SHA256 hash:	bbff2bce7c553d1e11b48a38bfd351f9e715b683171f596751d78ace10782e79
SHA3-384 hash:	5e3e8a29dab1d9559b52478893ab5a74330b00b7a377cb46bac989b45b797295b962c6145a752c50cbab07119f802348
SHA1 hash:	4ca6d35e97aa05ac5f00468afe82eafd53e87cad
MD5 hash:	a1a45847a65b6b39bce75c35174054f6
humanhash:	papa-stairway-washington-yellow
File name:	Doc-3737122.xlsm
Download:	download sample
Signature	AgentTesla Create hunting rule
File size:	167'061 bytes
First seen:	2023-09-15 07:23:42 UTC
Last seen:	Never
File type:	xlsm
MIME type:	application/vnd.openxmlformats-officedocument.spreadsheetml.sheet
ssdeep	3072:VlgkqZrBX6HxU1GoLa7r5rligZBYnJbTS7xNn9JxtLOfa27jwg4q:VlR2rgaGo+/i63ntLwaCjwHq
TLSH	T18DF3127DD29E68D8C1CE60BA960850C7CAA17756FB007C7662CAD3C11FBA1D304967AF
TrID	50.4% (.XLSM) Excel Microsoft Office Open XML Format document (with Macro) (57500/1/12) 29.8% (.XLSX) Excel Microsoft Office Open XML Format document (34000/1/7) 15.3% (.ZIP) Open Packaging Conventions container (17500/1/4) 3.5% (.ZIP) ZIP compressed archive (4000/1) 0.8% (.PG/BIN) PrintFox/Pagefox bitmap (640x800) (1000/1)
Reporter	abuse_ch
Tags:	AgentTesla xlsm

Office OLE Information

This malware samples appears to be an Office document. The following table provides more information about this document using oletools and oledump.

OLE id

Maldoc score: 11

OLE dump

MalwareBazaar was able to identify 7 sections in this file using oledump:

Section ID	Section size	Section name
A1	468 bytes	PROJECT
A2	62 bytes	PROJECTwm
A3	169 bytes	VBA/Sheet1
A4	688 bytes	VBA/ThisWorkbook
A5	7 bytes	VBA/_VBA_PROJECT
A6	209 bytes	VBA/dir

OLE vba

MalwareBazaar was able to extract and deobfuscate VBA script(s) the following information from OLE objects embedded in this file using olevba:

Type	Keyword	Description
AutoExec	Workbook_Open	Runs when the Excel Workbook is opened
IOC	193.203.203.67	IPv4 address
IOC	3737122pdf.exe	Executable file name
Suspicious	Shell	May run an executable file or a system command
Suspicious	WScript.Shell	May run an executable file or a system command
Suspicious	CreateObject	May create an OLE object
Suspicious	Exec	May run an executable file or a system
Suspicious	Hex Strings	Hex-encoded strings were detected, may be used to obfuscate strings (option --decode to see all)

Intelligence

File Origin

# of uploads :

# of downloads :

345

Origin country :

Vendor Threat Intelligence

Malware family:

agenttesla

ID:

File name:

Doc-3737122.xlsm

Verdict:

Malicious activity

Analysis date:

2023-09-15 07:31:28 UTC

Tags:

loader stealer agenttesla

Link:

https://app.any.run/tasks/391a683b-ca14-4007-8f29-6b81c32e1e05

Note:

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

Detection:

n/a

Link:

https://www.capesandbox.com/analysis/448785/

Detection(s):

TwinWave.EvilDoc.PublicDottedQuadDLrRunLikeHell.20210223.UNOFFICIAL

TwinWave.EvilDoc.DOCXRSTRGOOD.POWERSHELL.211012.UNOFFICIAL

TwinWave.EvilDoc.DOCXRSTRGOOD.START-PROC.211028.UNOFFICIAL

Result

Verdict:

Malicious

File Type:

Excel File with Macro

Link:

https://app.docguard.net/bbff2bce7c553d1e11b48a38bfd351f9e715b683171f596751d78ace10782e79/results/dashboard

Payload URLs

URL

File name

193.203.203.67

ThisWorkbook

Behaviour

BlacklistAPI detected

Document image

Image:

Download PNG

Verdict:

Malicious

Threat level:

10/10

Confidence:

100%

Tags:

macros macros-on-open

Link:

https://www.filescan.io/uploads/650406927aa68bd3a1facf9e/reports/6dafa757-9a8a-4084-8451-d96efb606b27/overview

Verdict:

Malicious

Labled as:

Msoffice/malicious_confidence_100%

Link:

https://www.hybrid-analysis.com/sample/bbff2bce7c553d1e11b48a38bfd351f9e715b683171f596751d78ace10782e79

Label:

Malicious

Suspicious Score:

9.8/10

Score Malicious:

99%

Score Benign:

Link:

https://www.malware.ai/gui/files/?id=550a0de1-c983-48bb-b3a1-23df8c169540

Result

Verdict:

MALICIOUS

Link:

https://labs.inquest.net/dfi/sha256/bbff2bce7c553d1e11b48a38bfd351f9e715b683171f596751d78ace10782e79

Details

Chunked Suspicious Strings

Detected seemingly chunked sensitive strings. High likely hood of obfuscated malintent.

Macro with Startup Hook

Detected macro logic that will automatically execute on document open. Most malware contains some execution hook.

IPv4 Dotted Quad URL

A URL was detected referencing a direct IP address, as opposed to a domain name.

Macro Contains Suspicious String

Detected a macro with a suspicious string. Suspicious strings include privileged function calls, obfuscations, odd registry keys, etc...

Document With No Content

Document contains little or no semantic information.

Result

Threat name:

AgentTesla

Detection:

malicious

Classification:

troj.spyw.expl.evad

Score:

100 / 100

Link:

https://www.joesandbox.com/analysis/1308776

Signature

.NET source code contains potential unpacker

Allocates memory in foreign processes

Antivirus / Scanner detection for submitted sample

Antivirus detection for dropped file

Bypasses PowerShell execution policy

Contains functionality to log keystrokes (.Net Source)

Document contains an embedded VBA macro with suspicious strings

Document exploit detected (process start blacklist hit)

Found malware configuration

Injects a PE file into a foreign processes

Machine Learning detection for dropped file

Machine Learning detection for sample

May check the online IP address of the machine

Multi AV Scanner detection for dropped file

Multi AV Scanner detection for submitted file

Office document tries to convince victim to disable security protection (e.g. to enable ActiveX or Macros)

Powershell drops PE file

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

Sample uses string decryption to hide its real strings

Suspicious powershell command line found

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 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 Costura Assembly Loader

Behaviour

Behavior Graph:

Download SVG

Detection:

n/a

Link:

https://mwdb.cert.pl/sample/bbff2bce7c553d1e11b48a38bfd351f9e715b683171f596751d78ace10782e79/

Threat name:

Document-Office.Trojan.Heuristic

Status:

Malicious

First seen:

2023-09-14 11:54:56 UTC

File Type:

Document

Extracted files:

AV detection:

9 of 36 (25.00%)

Threat level:

2/5

Detection(s):

Suspicious file

Link:

https://check.spamhaus.org/check/?searchterm=xp7sxtt4ku6r4enuri4l7u2r7htrlnudc4pvsz2r26fm4edyfz4q._file

Result

Malware family:

n/a

Score:

10/10

Tags:

macro

Link:

https://tria.ge/reports/230915-h8c3tscb89/

Behaviour

Checks processor information in registry

Enumerates system info in registry

Modifies Internet Explorer settings

Modifies registry class

Suspicious behavior: AddClipboardFormatListener

Suspicious behavior: EnumeratesProcesses

Suspicious use of AdjustPrivilegeToken

Suspicious use of FindShellTrayWindow

Suspicious use of SetWindowsHookEx

Suspicious use of WriteProcessMemory

Office loads VBA resources, possible macro or embedded object present

Downloads MZ/PE file

Process spawned unexpected child process

Malware family:

AgentTesla.v4

Verdict:

Malicious

Link:

https://www.vmray.com/analyses/_mb/bbff2bce7c55/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/bbff2bce7c553d1e11b48a38bfd351f9e715b683171f596751d78ace10782e79

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:	BitcoinAddress Create hunting rule
Author:	Didier Stevens (@DidierStevens)
Description:	Contains a valid Bitcoin address

Rule name:	Check_OutputDebugStringA_iat Create hunting rule

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

Rule name:	DebuggerException__SetConsoleCtrl 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:	maldoc_getEIP_method_1 Create hunting rule
Author:	Didier Stevens (https://DidierStevens.com)

Rule name:	malware_shellcode_hash Create hunting rule
Author:	JPCERT/CC Incident Response Group
Description:	detect shellcode api hash value

Rule name:	meth_get_eip Create hunting rule
Author:	Willi Ballenthin

Rule name:	office_document_vba Create hunting rule
Author:	Jean-Philippe Teissier / @Jipe_
Description:	Office document with embedded VBA
Reference:	https://github.com/jipegit/

Rule name:	PE_Digital_Certificate Create hunting rule
Author:	albertzsigovits

Rule name:	pe_imphash Create hunting rule

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

Rule name:	vbaproject_bin Create hunting rule
Author:	CD_R0M_
Description:	{76 62 61 50 72 6f 6a 65 63 74 2e 62 69 6e} is hex for vbaproject.bin. Macros are often used by threat actors. Work in progress - Ran out of time

File information

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

Malspam

AgentTesla

xlsm bbff2bce7c553d1e11b48a38bfd351f9e715b683171f596751d78ace10782e79

(this sample)

Delivery method

Distributed via e-mail attachment

Cape

https://www.capesandbox.com/analysis/448785/

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