MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 20728d460c5c42cbd40ad4c4bcffa85013f4763501b561acccf23d76c871894d. 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: 14


Maldoc score: 2


Intelligence 14 IOCs YARA 4 File information Comments

SHA256 hash: 20728d460c5c42cbd40ad4c4bcffa85013f4763501b561acccf23d76c871894d
SHA3-384 hash: 6264f636b34862d38fb82bb723d8a6a8de3a4287f05df6b18c3523fb2bb147c3ef29bfec6490719dd3b25b95e53cac11
SHA1 hash: 8f274288e21c4907690c0925e9a4fd44293cf3af
MD5 hash: b6e5689997ab86f037c75abe3478ed5d
humanhash: equal-lake-texas-arizona
File name:Fattura N.25 del 30092023.xls
Download: download sample
Signature AgentTesla
File size:961'024 bytes
First seen:2023-11-13 16:42:57 UTC
Last seen:Never
File type:Excel file xls
MIME type:application/vnd.ms-excel
ssdeep 24576:g/BHw6/BZy83bVmEgTIZ3v5bJvuwAYyv4OL5udmwNx:D6/rt3bVm7TGRVvuwcQO1ni
TLSH T16215E103FD40CB43D40C83B4AEE38DE90B16AE54EE9659CB204BBB4F3E716625D6751A
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-2017-11882 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: 2
OLE dump

MalwareBazaar was able to identify 31 sections in this file using oledump:

Section IDSection sizeSection name
1114 bytesCompObj
2244 bytesDocumentSummaryInformation
3120200 bytesSummaryInformation
494 bytesMBD002AA4DA/CompObj
564 bytesMBD002AA4DA/Ole
620409 bytesMBD002AA4DA/CONTENTS
794 bytesMBD002AA4DB/CompObj
864 bytesMBD002AA4DB/Ole
912169 bytesMBD002AA4DB/CONTENTS
1094 bytesMBD002AA4DC/CompObj
1164 bytesMBD002AA4DC/Ole
127284 bytesMBD002AA4DC/CONTENTS
1394 bytesMBD002AA4DD/CompObj
1462 bytesMBD002AA4DD/Ole
1564830 bytesMBD002AA4DD/CONTENTS
1693 bytesMBD002AA4DE/CompObj
1764 bytesMBD002AA4DE/Ole
18124841 bytesMBD002AA4DE/CONTENTS
19114 bytesMBD002AA4DF/CompObj
20708 bytesMBD002AA4DF/DocumentSummaryInformation
2123248 bytesMBD002AA4DF/SummaryInformation
2297872 bytesMBD002AA4DF/Workbook
23424 bytesMBD002AA4DF/_VBA_PROJECT_CUR/PROJECT
2462 bytesMBD002AA4DF/_VBA_PROJECT_CUR/PROJECTwm
25977 bytesMBD002AA4DF/_VBA_PROJECT_CUR/VBA/Sheet1
26985 bytesMBD002AA4DF/_VBA_PROJECT_CUR/VBA/ThisWorkbook
272329 bytesMBD002AA4DF/_VBA_PROJECT_CUR/VBA/_VBA_PROJECT
28517 bytesMBD002AA4DF/_VBA_PROJECT_CUR/VBA/dir
291692 bytesMBD002AA4E0/OlE10nAtIVE
3020 bytesMBD002AA4E0/Ole
31463812 bytesWorkbook
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 :
372
Origin country :
NL NL
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
Fattura N.25 del 30092023.xls
Verdict:
Malicious activity
Analysis date:
2023-11-13 10:42:48 UTC
Tags:
phishing phishing-pdf phishing-xls opendir loader

Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Result
Verdict:
Malware
Maliciousness:

Behaviour
Searching for the window
Sending a custom TCP request
Creating a window
Searching for synchronization primitives
Launching a process
Creating a file in the %AppData% directory
Сreating synchronization primitives
Creating a file
Using the Windows Management Instrumentation requests
Sending an HTTP GET request
Creating a process from a recently created file
Unauthorized injection to a system process
Result
Verdict:
Malicious
File Type:
Legacy Excel File
Behaviour
BlacklistAPI detected
Document image
Document image
Verdict:
Malicious
Threat level:
  10/10
Confidence:
100%
Tags:
embedequation exploit exploit macros packed shellcode sload
Label:
Benign
Suspicious Score:
3.0/10
Score Malicious:
3%
Score Benign:
7%
Result
Verdict:
MALICIOUS
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
Detection:
malicious
Classification:
troj.spyw.expl.evad
Score:
100 / 100
Signature
Allocates memory in foreign processes
Antivirus / Scanner detection for submitted sample
Antivirus detection for URL or domain
Contains functionality to log keystrokes (.Net Source)
Found malware configuration
Injects a PE file into a foreign processes
Installs a global keyboard hook
Machine Learning detection for dropped file
Malicious sample detected (through community Yara rule)
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)
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)
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
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
Behaviour
Behavior Graph:
behaviorgraph top1 signatures2 2 Behavior Graph ID: 1341827 Sample: Fattura_N.25_del_30092023.xls Startdate: 13/11/2023 Architecture: WINDOWS Score: 100 50 Found malware configuration 2->50 52 Malicious sample detected (through community Yara rule) 2->52 54 Antivirus detection for URL or domain 2->54 56 12 other signatures 2->56 7 EQNEDT32.EXE 12 2->7         started        12 EQNEDT32.EXE 10 2->12         started        14 AcroRd32.exe 34 2->14         started        16 EXCEL.EXE 58 54 2->16         started        process3 dnsIp4 38 91.92.241.20, 49163, 80 THEZONEBG Bulgaria 7->38 34 C:\Users\user\AppData\Roaming\unsecapp.exe, PE32+ 7->34 dropped 36 C:\Users\user\AppData\...\unsecapp[1].exe, PE32+ 7->36 dropped 68 Office equation editor establishes network connection 7->68 70 Office equation editor starts processes (likely CVE 2017-11882 or CVE-2018-0802) 7->70 18 unsecapp.exe 7->18         started        21 unsecapp.exe 12->21         started        23 RdrCEF.exe 2 14->23         started        26 RdrCEF.exe 2 14->26         started        file5 signatures6 process7 dnsIp8 58 Multi AV Scanner detection for dropped file 18->58 60 Machine Learning detection for dropped file 18->60 62 Writes to foreign memory regions 18->62 28 CasPol.exe 4 18->28         started        64 Allocates memory in foreign processes 21->64 66 Injects a PE file into a foreign processes 21->66 32 CasPol.exe 21->32         started        40 192.168.2.255, 137, 138 unknown unknown 23->40 signatures9 process10 dnsIp11 42 mail.bretoffice.com 28->42 44 bretoffice.com 28->44 72 Tries to harvest and steal Putty / WinSCP information (sessions, passwords, etc) 28->72 74 Queries sensitive network adapter information (via WMI, Win32_NetworkAdapter, often done to detect virtual machines) 28->74 76 Tries to steal Mail credentials (via file / registry access) 28->76 46 mail.bretoffice.com 32->46 48 bretoffice.com 32->48 78 Tries to harvest and steal browser information (history, passwords, etc) 32->78 80 Installs a global keyboard hook 32->80 signatures12
Threat name:
Win32.Exploit.CVE-2018-0802
Status:
Malicious
First seen:
2023-11-13 13:43:01 UTC
File Type:
Document
Extracted files:
66
AV detection:
12 of 37 (32.43%)
Threat level:
  5/5
Result
Malware family:
agenttesla
Score:
  10/10
Tags:
family:agenttesla keylogger spyware stealer trojan
Behaviour
Checks processor information in registry
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 FindShellTrayWindow
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
Suspicious use of SetThreadContext
Executes dropped EXE
Loads dropped DLL
Blocklisted process makes network request
Downloads MZ/PE file
AgentTesla
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:INDICATOR_OLE_EXPLOIT_CVE_2017_11882_1
Author:ditekSHen
Description:detects OLE documents potentially exploiting CVE-2017-11882
Rule name:informational_win_ole_protected
Author:Jeff White (karttoon@gmail.com) @noottrak
Description:Identify OLE Project protection within documents.
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 20728d460c5c42cbd40ad4c4bcffa85013f4763501b561acccf23d76c871894d

(this sample)

  
Delivery method
Distributed via e-mail attachment

Comments