MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 49cbd743a040465d6757e0e5d408d674624053368967940cd8c51ac97925bfc8. 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: 4


Intelligence 13 IOCs YARA 4 File information Comments

SHA256 hash: 49cbd743a040465d6757e0e5d408d674624053368967940cd8c51ac97925bfc8
SHA3-384 hash: 86fe4ec9c62134583ae823532569e3f41533e4efc6d3f58447f7af8403e60add7ef19f25f6bda2e0574cab4de1f719e7
SHA1 hash: bf41a1fb5658b33d886ddc20b7d424c6dbd91d15
MD5 hash: 2ac8a298c47d91f127ff8951e5e00fd4
humanhash: victor-football-delaware-uncle
File name:gunzipped.xls
Download: download sample
Signature AgentTesla
File size:400'896 bytes
First seen:2023-11-28 07:03:26 UTC
Last seen:Never
File type:Excel file xls
MIME type:application/vnd.ms-excel
ssdeep 6144:Zn1m9kdbk71u+FZetJs0hdMJUXWDYWBXVH11IyqyLuJvsEKEY6Uvo:ZOee1CtqSdLWDYMZ1SFPsETYPvo
TLSH T193841206FA66CA1FCC179430DCC5B4DFC328ACA89F55A74F73CAB71E82315E64122695
TrID 46.5% (.XLS) Microsoft Excel sheet (alternate) (56500/1/4)
26.7% (.XLS) Microsoft Excel sheet (32500/1/3)
20.1% (.XLS) Microsoft Excel sheet (alternate) (24500/1/2)
6.5% (.) Generic OLE2 / Multistream Compound (8000/1)
Reporter abuse_ch
Tags:AgentTesla CVE-2018-0802 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: 4
OLE dump

MalwareBazaar was able to identify 15 sections in this file using oledump:

Section IDSection sizeSection name
1114 bytesCompObj
2244 bytesDocumentSummaryInformation
3200 bytesSummaryInformation
499 bytesMBD0022BC05/CompObj
5200809 bytesMBD0022BC05/Package
6878 bytesMBD0022BC06/Ole
7182099 bytesWorkbook
8527 bytes_VBA_PROJECT_CUR/PROJECT
9104 bytes_VBA_PROJECT_CUR/PROJECTwm
10977 bytes_VBA_PROJECT_CUR/VBA/Sheet1
11977 bytes_VBA_PROJECT_CUR/VBA/Sheet2
12977 bytes_VBA_PROJECT_CUR/VBA/Sheet3
13985 bytes_VBA_PROJECT_CUR/VBA/ThisWorkbook
142644 bytes_VBA_PROJECT_CUR/VBA/_VBA_PROJECT
15553 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:

TypeKeywordDescription
SuspiciousHex StringsHex-encoded strings were detected, may be used to obfuscate strings (option --decode to see all)

Intelligence


File Origin
# of uploads :
1
# of downloads :
353
Origin country :
NL NL
Vendor Threat Intelligence
Verdict:
Legit
File type:
application/vnd.ms-excel
Has a screenshot:
False
Contains macros:
False
Result
Verdict:
Malware
Maliciousness:

Behaviour
Searching for the window
Sending a custom TCP request
Creating a window
Searching for synchronization primitives
Launching a process
Сreating synchronization primitives
Creating a file
DNS request
Creating a file in the %AppData% directory
Creating a process with a hidden window
Sending an HTTP GET request
Launching a process by exploiting the app vulnerability
Creating a process from a recently created file
Result
Verdict:
Malicious
File Type:
Legacy Excel File with Macro
Payload URLs
URL
File name
http://107.173.229.146/www/microsoftEdgedeletedentirehistorycachefromthepctoclean.Doc
Embedded Ole
Behaviour
SuspiciousRTF detected
Document image
Document image
Verdict:
Malicious
Threat level:
  10/10
Confidence:
100%
Tags:
embedequation exploit macros shellcode sload sload
Label:
Benign
Suspicious Score:
3.1/10
Score Malicious:
31%
Score Benign:
69%
Result
Threat name:
AgentTesla
Detection:
malicious
Classification:
troj.spyw.expl.evad
Score:
100 / 100
Signature
.NET source code contains potential unpacker
.NET source code contains very large array initializations
Adds a directory exclusion to Windows Defender
Antivirus detection for dropped file
Antivirus detection for URL or domain
Contains functionality to log keystrokes (.Net Source)
Document embeds suspicious OLE2 link
Excel sheet contains many unusual embedded objects
Found malware configuration
Hides that the sample has been downloaded from the Internet (zone.identifier)
Injects a PE file into a foreign processes
Injects files into Windows application
Malicious sample detected (through community Yara rule)
Microsoft Office drops suspicious files
Microsoft Office launches external ms-search protocol handler (WebDAV)
Multi AV Scanner detection for domain / URL
Multi AV Scanner detection for dropped file
Multi AV Scanner detection for submitted file
Office equation editor drops PE file
Office equation editor establishes network connection
Office equation editor starts processes (likely CVE 2017-11882 or CVE-2018-0802)
Office viewer loads remote template
Powershell uses Background Intelligent Transfer Service (BITS)
Queries sensitive network adapter information (via WMI, Win32_NetworkAdapter, often done to detect virtual machines)
Shellcode detected
Sigma detected: EQNEDT32.EXE connecting to internet
Sigma detected: File Dropped By EQNEDT32EXE
Sigma detected: Scheduled temp file as task from temp location
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)
Uses schtasks.exe or at.exe to add and modify task schedules
Yara detected AgentTesla
Yara detected Generic Downloader
Behaviour
Behavior Graph:
behaviorgraph top1 signatures2 2 Behavior Graph ID: 1349081 Sample: gunzipped.xls Startdate: 28/11/2023 Architecture: WINDOWS Score: 100 84 Multi AV Scanner detection for domain / URL 2->84 86 Found malware configuration 2->86 88 Malicious sample detected (through community Yara rule) 2->88 90 17 other signatures 2->90 7 EQNEDT32.EXE 12 2->7         started        11 taskeng.exe 2->11         started        13 winrar.exe 2->13         started        15 4 other processes 2->15 process3 dnsIp4 58 C:\Users\user\AppData\Roaming\wlanext.exe, PE32 7->58 dropped 60 C:\Users\user\AppData\...\wlanext[1].exe, PE32 7->60 dropped 110 Office equation editor establishes network connection 7->110 112 Office equation editor starts processes (likely CVE 2017-11882 or CVE-2018-0802) 7->112 18 wlanext.exe 1 10 7->18         started        22 PyBQOQK.exe 11->22         started        114 Multi AV Scanner detection for dropped file 13->114 116 Queries sensitive network adapter information (via WMI, Win32_NetworkAdapter, often done to detect virtual machines) 13->116 118 Adds a directory exclusion to Windows Defender 13->118 120 Injects a PE file into a foreign processes 13->120 24 winrar.exe 13->24         started        26 powershell.exe 13->26         started        28 schtasks.exe 13->28         started        76 107.173.229.146, 49162, 49163, 49164 AS-COLOCROSSINGUS United States 15->76 62 C:\Users\user\...\www on 107.173.229.146.url, MS 15->62 dropped 64 microsoftEdgedelet...hepctoclean.Doc.url, MS 15->64 dropped 66 ~WRF{7D97F515-5826...2-D473AA3FA73D}.tmp, Composite 15->66 dropped 68 2 other malicious files 15->68 dropped 122 Microsoft Office launches external ms-search protocol handler (WebDAV) 15->122 124 Office viewer loads remote template 15->124 126 Microsoft Office drops suspicious files 15->126 128 Injects files into Windows application 15->128 30 winrar.exe 15->30         started        33 powershell.exe 15->33         started        35 schtasks.exe 15->35         started        37 winrar.exe 15->37         started        file5 signatures6 process7 dnsIp8 54 C:\Users\user\AppData\Roaming\PyBQOQK.exe, PE32 18->54 dropped 56 C:\Users\user\AppData\Local\...\tmp9D88.tmp, XML 18->56 dropped 92 Multi AV Scanner detection for dropped file 18->92 94 Queries sensitive network adapter information (via WMI, Win32_NetworkAdapter, often done to detect virtual machines) 18->94 96 Uses schtasks.exe or at.exe to add and modify task schedules 18->96 39 wlanext.exe 18->39         started        43 powershell.exe 4 18->43         started        45 schtasks.exe 18->45         started        98 Adds a directory exclusion to Windows Defender 22->98 100 Injects a PE file into a foreign processes 22->100 47 PyBQOQK.exe 22->47         started        50 powershell.exe 22->50         started        52 schtasks.exe 22->52         started        102 Powershell uses Background Intelligent Transfer Service (BITS) 26->102 72 api4.ipify.org 30->72 74 api.ipify.org 30->74 104 Tries to harvest and steal Putty / WinSCP information (sessions, passwords, etc) 30->104 106 Tries to steal Mail credentials (via file / registry access) 30->106 108 Tries to harvest and steal browser information (history, passwords, etc) 30->108 file9 signatures10 process11 dnsIp12 70 C:\Users\user\AppData\Roaming\...\winrar.exe, PE32 39->70 dropped 130 Tries to harvest and steal Putty / WinSCP information (sessions, passwords, etc) 39->130 132 Tries to steal Mail credentials (via file / registry access) 39->132 134 Hides that the sample has been downloaded from the Internet (zone.identifier) 39->134 136 Powershell uses Background Intelligent Transfer Service (BITS) 43->136 78 173.231.16.77, 443, 49170, 49171 WEBNXUS United States 47->78 80 api4.ipify.org 47->80 82 api.ipify.org 47->82 file13 signatures14
Threat name:
Document-Office.Exploit.CVE-2018-0802
Status:
Malicious
First seen:
2023-11-28 07:04:07 UTC
File Type:
Document
Extracted files:
91
AV detection:
5 of 37 (13.51%)
Threat level:
  5/5
Result
Malware family:
n/a
Score:
  8/10
Tags:
n/a
Behaviour
Checks processor information in registry
Creates scheduled task(s)
Enumerates system info in registry
Launches Equation Editor
Modifies Internet Explorer settings
Modifies registry class
Suspicious behavior: AddClipboardFormatListener
Suspicious behavior: EnumeratesProcesses
Suspicious use of AdjustPrivilegeToken
Suspicious use of SetWindowsHookEx
Suspicious use of WriteProcessMemory
Uses Task Scheduler COM API
Uses Volume Shadow Copy WMI provider
Uses Volume Shadow Copy service COM API
Office loads VBA resources, possible macro or embedded object present
Enumerates physical storage devices
Drops file in System32 directory
Abuses OpenXML format to download file from external location
Executes dropped EXE
Loads dropped DLL
Blocklisted process makes network request
Downloads MZ/PE file
Malware family:
AgentTesla
Verdict:
Malicious
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:informational_win_ole_protected
Author:Jeff White (karttoon@gmail.com) @noottrak
Description:Identify OLE Project protection within documents.
Rule name:maldoc_find_kernel32_base_method_1
Author:Didier Stevens (https://DidierStevens.com)
Rule name:maldoc_OLE_file_magic_number
Author:Didier Stevens (https://DidierStevens.com)
Rule name:office_document_vba
Author:Jean-Philippe Teissier / @Jipe_
Description:Office document with embedded VBA
Reference:https://github.com/jipegit/

File information


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

Malspam

AgentTesla

Excel file xls 49cbd743a040465d6757e0e5d408d674624053368967940cd8c51ac97925bfc8

(this sample)

  
Delivery method
Distributed via e-mail attachment

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