MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 4bf681d9d33768255dd82ebebae98d1a95f93c2c522bf58e8feff495537b6884. 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: 12


Intelligence 12 IOCs YARA 15 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 4bf681d9d33768255dd82ebebae98d1a95f93c2c522bf58e8feff495537b6884
SHA3-384 hash: 1905b023f58f5310eca0cdf35157ba68255ba8117bd1076c6a7ae300bba36e37a7bdccd4480db7b13908db7de0cadd88
SHA1 hash: 5cfa26542f975800a06cb6b430c91575156e6790
MD5 hash: 4a8a3ce41654eca4fb51b360e4c34006
humanhash: four-speaker-low-sierra
File name:Booking copy.xls
Download: download sample
Signature AgentTesla
Create hunting rule
File size:325'120 bytes
First seen:2024-04-12 09:01:47 UTC
Last seen:2024-04-12 09:46:01 UTC
File type:Excel file xls
MIME type:application/vnd.ms-excel
ssdeep 6144:cWunJGbEvY35qAOJl/YrLYz+WrNhZF+E+fgL+0dD8ivSbVhiMIatq/cluBxZK+Pd:cHJGbEy3bVhiMI2qEmI+wC2px
TLSH T15164E051FE41870AD856473149F74AAB6221FC419F924B0F325CF72E3DF43A82E27A62
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 lowmal3
Tags:AgentTesla xls

Intelligence

File Origin
# of uploads :
2
# of downloads :
338
Origin country :
DE DE
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
4bf681d9d33768255dd82ebebae98d1a95f93c2c522bf58e8feff495537b6884.xls
Verdict:
Malicious activity
Analysis date:
2024-04-12 09:06:32 UTC
Tags:
phishing phishing-xls
Link:
https://app.any.run/tasks/f27d00ed-da0b-4631-8dcd-440a0bcc70d6

Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Verdict:
Legit
File type:
application/vnd.ms-excel
Has a screenshot:
False
Contains macros:
False
Result
Verdict:
Malware
Maliciousness:

Behaviour
Sending a custom TCP request
Launching a service
Searching for the window
Using the Windows Management Instrumentation requests
Creating a window
DNS request
Sending an HTTP GET request
Searching for synchronization primitives
Launching a process
Сreating synchronization primitives
Creating a file
Connection attempt
Connection attempt by exploiting the app vulnerability
Sending a custom TCP request by exploiting the app vulnerability
Launching a process by exploiting the app vulnerability
Result
Verdict:
Malicious
File Type:
Legacy Excel File with Macro
Link:
https://app.docguard.net/4bf681d9d33768255dd82ebebae98d1a95f93c2c522bf58e8feff495537b6884/results/dashboard
Payload URLs
URL
File name
http://lnkz.at/FVOYj
Embedded Ole
Behaviour
SuspiciousRTF detected
Document image
Image:
Download PNG
Document image
Verdict:
Malicious
Threat level:
  10/10
Confidence:
100%
Tags:
embedequation exploit macros phishing shellcode
Link:
https://www.filescan.io/uploads/6618f88be824d2f0c7c2ee45/reports/746bbe13-70da-4f43-acaf-8a5adeaaa3ce/overview
Verdict:
Malicious
Labled as:
CVE-2017-0199
Link:
https://www.hybrid-analysis.com/sample/4bf681d9d33768255dd82ebebae98d1a95f93c2c522bf58e8feff495537b6884
Label:
Benign
Suspicious Score:
3.4/10
Score Malicious:
34%
Score Benign:
66%
Link:
https://www.malware.ai/gui/files/?id=22af9d4f-68e8-4cae-9198-f02391ae27e4
Result
Verdict:
MALICIOUS
Link:
https://labs.inquest.net/dfi/sha256/4bf681d9d33768255dd82ebebae98d1a95f93c2c522bf58e8feff495537b6884
Details
Document With Few Pages
Document contains between one and three pages of content. Most malicious documents are sparse in page count.
Result
Threat name:
AgentTesla
Create hunting rule
Detection:
malicious
Classification:
troj.spyw.expl.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1424996
Signature
.NET source code contains potential unpacker
.NET source code contains very large array initializations
Adds a directory exclusion to Windows Defender
Allocates memory in foreign processes
Antivirus detection for dropped file
Antivirus detection for URL or domain
Contains functionality to log keystrokes (.Net Source)
Document exploit detected (process start blacklist hit)
Excel sheet contains many unusual embedded objects
Found malware configuration
Injects a PE file into a foreign processes
Installs new ROOT certificates
Machine Learning detection for dropped file
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 submitted file
Office document tries to convince victim to disable security protection (e.g. to enable ActiveX or Macros)
Office drops RTF 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
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: Equation Editor Network Connection
Sigma detected: File Dropped By EQNEDT32EXE
Sigma detected: Powershell Base64 Encoded MpPreference Cmdlet
Sigma detected: Scheduled temp file as task from temp location
Sigma detected: Suspicious Binary In User Directory Spawned From Office Application
Sigma detected: Suspicious Microsoft Office Child Process
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
Writes to foreign memory regions
Yara detected AgentTesla
Yara detected Generic Downloader
Yara detected MalDoc
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 1424996 Sample: Booking copy.xls Startdate: 12/04/2024 Architecture: WINDOWS Score: 100 64 lnkz.at 2->64 76 Multi AV Scanner detection for domain / URL 2->76 78 Found malware configuration 2->78 80 Malicious sample detected (through community Yara rule) 2->80 82 23 other signatures 2->82 8 EXCEL.EXE 58 55 2->8         started        12 taskeng.exe 2->12         started        signatures3 process4 dnsIp5 68 lnkz.at 172.67.180.182, 443, 49163, 49164 CLOUDFLARENETUS United States 8->68 70 104.168.32.18, 49165, 49172, 49173 AS-COLOCROSSINGUS United States 8->70 50 wecankissinglovers...rboobstokiss[1].doc, Rich 8->50 dropped 14 CNN.exe 5 8->14         started        18 WINWORD.EXE 337 43 8->18         started        21 AcroRd32.exe 8->21         started        23 NyQntoOzyvcYfC.exe 12->23         started        file6 process7 dnsIp8 52 C:\Users\user\AppData\...52yQntoOzyvcYfC.exe, PE32 14->52 dropped 54 C:\Users\user\AppData\Local\...\tmpC302.tmp, XML 14->54 dropped 98 Antivirus detection for dropped file 14->98 100 Machine Learning detection for dropped file 14->100 102 Uses schtasks.exe or at.exe to add and modify task schedules 14->102 104 Injects a PE file into a foreign processes 14->104 25 RegSvcs.exe 14->25         started        29 powershell.exe 4 14->29         started        31 powershell.exe 4 14->31         started        33 schtasks.exe 14->33         started        66 lnkz.at 18->66 56 C:\Users\user\AppData\Roaming\...\lnkz.at.url, MS 18->56 dropped 58 C:\Users\user\AppData\Roaming\...\FVOYj.url, MS 18->58 dropped 60 ~WRF{1B418474-5690...9-06E0CE19F1C3}.tmp, Composite 18->60 dropped 62 C:\Users\user\AppData\Local\...\1603C7EB.doc, Rich 18->62 dropped 106 Microsoft Office launches external ms-search protocol handler (WebDAV) 18->106 108 Office viewer loads remote template 18->108 110 Microsoft Office drops suspicious files 18->110 35 EQNEDT32.EXE 12 18->35         started        38 RdrCEF.exe 21->38         started        112 Writes to foreign memory regions 23->112 114 Allocates memory in foreign processes 23->114 116 Adds a directory exclusion to Windows Defender 23->116 40 RegSvcs.exe 23->40         started        42 powershell.exe 23->42         started        44 2 other processes 23->44 file9 signatures10 process11 dnsIp12 72 api.ipify.org 104.26.13.205, 443, 49174 CLOUDFLARENETUS United States 25->72 84 Tries to harvest and steal Putty / WinSCP information (sessions, passwords, etc) 25->84 86 Queries sensitive network adapter information (via WMI, Win32_NetworkAdapter, often done to detect virtual machines) 25->86 88 Tries to steal Mail credentials (via file / registry access) 25->88 90 Installs new ROOT certificates 29->90 46 C:\Users\user\AppData\Roaming\CNN.exe, PE32 35->46 dropped 48 C:\Users\user\AppData\...\IFEANYI[1].exe, PE32 35->48 dropped 92 Office equation editor establishes network connection 35->92 94 Office equation editor starts processes (likely CVE 2017-11882 or CVE-2018-0802) 35->94 74 172.67.74.152, 443, 49175 CLOUDFLARENETUS United States 40->74 96 Tries to harvest and steal browser information (history, passwords, etc) 40->96 file13 signatures14
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/4bf681d9d33768255dd82ebebae98d1a95f93c2c522bf58e8feff495537b6884/
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=jp3idwotg5uckxoyf27lv2mndkk7spbmkiv7ldup572jku33ncca._file
Result
Malware family:
agenttesla
Create hunting rule
Score:
  10/10
Tags:
family:agenttesla keylogger spyware stealer trojan
Link:
https://tria.ge/reports/240412-kzfhpscb9s/
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
Suspicious use of SetThreadContext
Looks up external IP address via web service
Abuses OpenXML format to download file from external location
Executes dropped EXE
Loads dropped DLL
Blocklisted process makes network request
Downloads MZ/PE file
AgentTesla
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/4bf681d9d337/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/4bf681d9d33768255dd82ebebae98d1a95f93c2c522bf58e8feff495537b6884

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:Borland
Create hunting rule
Author:malware-lu
Rule name:Check_OutputDebugStringA_iat
Create hunting rule
Rule name:cobalt_strike_tmp01925d3f
Create hunting rule
Author:The DFIR Report
Description:files - file ~tmp01925d3f.exe
Reference:https://thedfirreport.com
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:informational_win_ole_protected
Create hunting rule
Author:Jeff White (karttoon@gmail.com) @noottrak
Description:Identify OLE Project protection within documents.
Rule name:maldoc_getEIP_method_1
Create hunting rule
Author:Didier Stevens (https://DidierStevens.com)
Rule name:maldoc_OLE_file_magic_number
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_no_import_table
Create hunting rule
Description:Detect pe file that no import table
Rule name:SEH__vba
Create hunting rule
Reference:https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara
Rule name:vmdetect
Create hunting rule
Author:nex
Description:Possibly employs anti-virtualization techniques

File information

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

Malspam

AgentTesla

Excel file xls 4bf681d9d33768255dd82ebebae98d1a95f93c2c522bf58e8feff495537b6884

(this sample)

  
Delivery method
Distributed via e-mail attachment

Comments