MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 291a081e38d4d12af7da73e4fafe9d2a9e001bc88e0f1a503037b7ffedcd4b68. 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: 6

Maldoc score: 6

Intelligence 6 IOCs YARA 6 File information Comments

SHA256 hash:	291a081e38d4d12af7da73e4fafe9d2a9e001bc88e0f1a503037b7ffedcd4b68
SHA3-384 hash:	cdef408ad0cf1fbae6b95eb6c67744d8ee1104978a465094c1a16859fcd41f110d243f9caf0bd6cbca61878d58e6b70c
SHA1 hash:	eeab923586eb77237c9a9e9ca110eb28f935c868
MD5 hash:	a44f4a190009c6693931456977dd15f8
humanhash:	delta-arkansas-massachusetts-four
File name:	4640578.xls
Download:	download sample
Signature	AgentTesla Create hunting rule
File size:	386'560 bytes
First seen:	2020-11-25 09:01:26 UTC
Last seen:	2020-11-25 10:47:58 UTC
File type:	xls
MIME type:	application/vnd.ms-excel
ssdeep	6144:jk3hOdsylKlgryzc4bNhZF+E+W2knMp6qI/O1SyjJ+ki74mpysnjbYIWmXFyCDKx:npPI21P+ksPysjbY1mXFzDdW/C9UJrsa
TLSH	55842273308C471BDD03573598AA66A433DAFD25BFAB824AE7A1F23657717C08803967
Reporter	cocaman
Tags:	AgentTesla xls

cocaman

Malicious email (T1566.001)
From: ""Toko Kaiun Kaisha, Ltd" <sungkwangmedtech@gmail.com>" (likely spoofed)
Received: "from gmail.com (unknown [185.222.57.137]) "
Date: "25 Nov 2020 08:55:49 +0100"
Subject: "Official Purchase Order P.O. Material Requirements"
Attachment: "4640578.xls"

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: 6

Application name is unknown

Office document is in OLE format

Office document contains VBA Macros

OLE dump

MalwareBazaar was able to identify 10 sections in this file using oledump:

Section ID	Section size	Section name
1	107 bytes	CompObj
2	228 bytes	DocumentSummaryInformation
3	176 bytes	SummaryInformation
4	377767 bytes	Workbook
5	484 bytes	_VBA_PROJECT_CUR/PROJECT
6	71 bytes	_VBA_PROJECT_CUR/PROJECTwm
7	741 bytes	_VBA_PROJECT_CUR/VBA/ThisWorkbook
8	7 bytes	_VBA_PROJECT_CUR/VBA/_VBA_PROJECT
9	172 bytes	_VBA_PROJECT_CUR/VBA/bcnsgoyxw
10	223 bytes	_VBA_PROJECT_CUR/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
Suspicious	Create	May execute file or a system command through WMI
Suspicious	CreateObject	May create an OLE object
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 :

134

Origin country :

n/a

Vendor Threat Intelligence

Result

Verdict:

Clean

Maliciousness:

Behaviour

Creating a window

Result

Verdict:

MALICIOUS

Details

Macro with Startup Hook

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

Macro Contains Suspicious String

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

Powershell

Possibly Powershell fragment found embedded.

Document With Minimal Content

Document contains less than 1 kilobyte of semantic information.

Result

Threat name:

AgentTesla

Detection:

malicious

Classification:

evad.troj

Score:

100 / 100

Link:

https://www.joesandbox.com/analysis/546786

Signature

.NET source code references suspicious native API functions

Bypasses PowerShell execution policy

Creates multiple autostart registry keys

Creates processes via WMI

Drops PE files to the user root directory

Machine Learning detection for dropped file

Multi AV Scanner detection for domain / URL

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 BIOS Information (via WMI, Win32_Bios & Win32_BaseBoard, often done to detect virtual machines)

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

Sigma detected: Executables Started in Suspicious Folder

Sigma detected: Execution in Non-Executable Folder

Sigma detected: Suspicious Program Location Process Starts

Suspicious powershell command line found

Tries to detect sandboxes and other dynamic analysis tools (process name or module or function)

Yara detected AgentTesla

Behaviour

Behavior Graph:

Download SVG

Detection:

n/a

Link:

https://mwdb.cert.pl/sample/291a081e38d4d12af7da73e4fafe9d2a9e001bc88e0f1a503037b7ffedcd4b68/

Threat name:

Script-Macro.Trojan.Heuristic

Status:

Malicious

First seen:

2020-11-25 06:53:09 UTC

File Type:

Document

Extracted files:

AV detection:

17 of 29 (58.62%)

Threat level:

2/5

Detection(s):

Malicious file

Link:

https://check.spamhaus.org/check/?searchterm=fenaqhry2tisv562opspv7u5fkpaag6iryhruubqg63773onjnua._file

Result

Malware family:

n/a

Score:

8/10

Tags:

macro

Link:

https://tria.ge/reports/201125-x7mmg4hk4x/

Behaviour

Enumerates system info in registry

Modifies Internet Explorer settings

Suspicious behavior: AddClipboardFormatListener

Suspicious use of SetWindowsHookEx

Checks processor information in registry

Office loads VBA resources, possible macro or embedded object present

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/291a081e38d4d12af7da73e4fafe9d2a9e001bc88e0f1a503037b7ffedcd4b68

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:	Email_stealer_bin_mem Create hunting rule
Author:	James_inthe_box
Description:	Email in files like avemaria

Rule name:	IPPort_combo_mem Create hunting rule
Author:	James_inthe_box
Description:	IP and port combo

Rule name:	PowerShell_in_Word_Doc Create hunting rule
Author:	Florian Roth
Description:	Detects a powershell and bypass keyword in a Word document
Reference:	Internal Research - ME

Rule name:	Select_from_enumeration Create hunting rule
Author:	James_inthe_box
Description:	IP and port combo

Rule name:	SharedStrings Create hunting rule
Author:	Katie Kleemola
Description:	Internal names found in LURK0/CCTV0 samples

Rule name:	UAC_bypass_bin_mem Create hunting rule
Author:	James_inthe_box
Description:	UAC bypass in files like avemaria

File information

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

Malspam

AgentTesla

xls 291a081e38d4d12af7da73e4fafe9d2a9e001bc88e0f1a503037b7ffedcd4b68

(this sample)

Delivery method

Distributed via e-mail attachment

Dropping

AgentTesla

Comments

Login required

You need to login to in order to write a comment. Login with your abuse.ch account.

No comments found for this malware sample