MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 ef30b686955d11c92ab89e6c5c5e4e61fc3d9797aca3d16d3011a1a6474847a6. 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


Formbook


Vendor detections: 15


Intelligence 15 IOCs YARA 17 File information Comments
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SHA256 hash: ef30b686955d11c92ab89e6c5c5e4e61fc3d9797aca3d16d3011a1a6474847a6
SHA3-384 hash: 0af5f08e175336819e91e35fd9d497246d48438b367a5df2a3afbac21e83bf877043559a80717cb98065350ea21fc743
SHA1 hash: 9eb6be3e283f4e456c877c9625881794a4eb4139
MD5 hash: 871a1bb5da74f0a5b7facc79ba2abfe3
humanhash: zulu-fourteen-king-six
File name:PO# 102471.xls
Download: download sample
Signature Formbook
Create hunting rule
File size:188'416 bytes
First seen:2023-10-10 12:49:21 UTC
Last seen:2023-10-12 15:21:39 UTC
File type:Excel file xls
MIME type:application/vnd.ms-excel
ssdeep 3072:jMuv+7Y35qAOJl/YrLYz+WrNhZFGzE+cugL+0dD4wE/zDiamh3mJUELr/c3V8Vqf:oY35qAOJl/YrLYz+WrNhZF+E+fgL+0d+
TLSH T1AF04E0A2F5C69C40EE1E873656B70AA66732FC4256B38B4B330C770A6BF06C05917767
TrID 58.2% (.XLS) Microsoft Excel sheet (alternate) (56500/1/4)
33.5% (.XLS) Microsoft Excel sheet (32500/1/3)
8.2% (.) Generic OLE2 / Multistream Compound (8000/1)
Reporter malwarelabnet
Tags:cve-2017-0199 FormBook 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 dump

MalwareBazaar was able to identify 9 sections in this file using oledump:

Section IDSection sizeSection name
1114 bytesCompObj
2244 bytesDocumentSummaryInformation
3200 bytesSummaryInformation
4114 bytesMBD00023248/CompObj
5708 bytesMBD00023248/DocumentSummaryInformation
6372 bytesMBD00023248/SummaryInformation
797808 bytesMBD00023248/Workbook
8738 bytesMBD00023249/Ole
982675 bytesWorkbook

Intelligence

File Origin
# of uploads :
3
# of downloads :
313
Origin country :
CA CA
Vendor Threat Intelligence
Malware family:
formbook
Create hunting rule
ID:
1
File name:
malicious.eml.msg
Verdict:
Malicious activity
Analysis date:
2023-10-10 09:21:03 UTC
Tags:
opendir exploit cve-2017-11882 loader formbook xloader stealer spyware
Link:
https://app.any.run/tasks/2932dbcb-c6c0-42fb-b43d-38e9b1618101

Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Detection(s):
SecuriteInfo.com.Trojan.Office.Doc.27656.18415.UNOFFICIAL
Create hunting rule

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
Sending an HTTP GET request to an infection source by exploiting the app vulnerability
Launching a process by exploiting the app vulnerability
Unauthorized injection to a system process
Result
Verdict:
Malicious
File Type:
Legacy Office File
Link:
https://app.docguard.net/ef30b686955d11c92ab89e6c5c5e4e61fc3d9797aca3d16d3011a1a6474847a6/results/dashboard
Document image
Image:
Download PNG
Document image
Verdict:
Malicious
Threat level:
  10/10
Confidence:
100%
Tags:
macros sload
Link:
https://www.filescan.io/uploads/6525487cbe42b2ac8e61a8fa/reports/590c311b-8012-4dce-b89a-37e4ae70d861/overview
Verdict:
Malicious
Labled as:
CVE-2017-0199
Link:
https://www.hybrid-analysis.com/sample/ef30b686955d11c92ab89e6c5c5e4e61fc3d9797aca3d16d3011a1a6474847a6
Label:
Benign
Suspicious Score:
1.8/10
Score Malicious:
18%
Score Benign:
82%
Link:
https://www.malware.ai/gui/files/?id=2bb6339e-c380-45c0-a659-004a15a66185
Result
Verdict:
MALICIOUS
Link:
https://labs.inquest.net/dfi/sha256/ef30b686955d11c92ab89e6c5c5e4e61fc3d9797aca3d16d3011a1a6474847a6
Result
Threat name:
n/a
Detection:
malicious
Classification:
expl.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1322912
Signature
Antivirus detection for dropped file
Antivirus detection for URL or domain
Document embeds suspicious OLE2 link
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 dropped 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
Sigma detected: File Dropped By EQNEDT32EXE
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 signatures2 2 Behavior Graph ID: 1322912 Sample: PO#_102471.xls Startdate: 10/10/2023 Architecture: WINDOWS Score: 100 34 Malicious sample detected (through community Yara rule) 2->34 36 Antivirus detection for URL or domain 2->36 38 Antivirus detection for dropped file 2->38 40 6 other signatures 2->40 6 EQNEDT32.EXE 12 2->6         started        10 WINWORD.EXE 346 49 2->10         started        12 EXCEL.EXE 33 30 2->12         started        process3 dnsIp4 18 C:\Users\user\AppData\Roaming\audiodgse.exe, PE32 6->18 dropped 20 C:\Users\user\AppData\Local\...\Ooseha[1].exe, PE32 6->20 dropped 42 Office equation editor establishes network connection 6->42 44 Office equation editor starts processes (likely CVE 2017-11882 or CVE-2018-0802) 6->44 15 audiodgse.exe 12 2 6->15         started        22 C:\Users\user\...\qw on 23.95.106.3.url, MS 10->22 dropped 24 0iuoioooUIOIOiiiu0...########000.dOC.url, MS 10->24 dropped 26 ~WRF{305837D9-40C0...D-64572C2060A0}.tmp, Composite 10->26 dropped 28 C:\Users\user\AppData\Local\...\7DBB8157.doc, ISO-8859 10->28 dropped 46 Microsoft Office launches external ms-search protocol handler (WebDAV) 10->46 48 Office viewer loads remote template 10->48 50 Microsoft Office drops suspicious files 10->50 32 23.95.106.3, 49164, 49165, 49166 AS-COLOCROSSINGUS United States 12->32 30 0iuoioooUIOIOiiiu0...#########000[1].doc, ISO-8859 12->30 dropped file5 signatures6 process7 signatures8 52 Antivirus detection for dropped file 15->52 54 Multi AV Scanner detection for dropped file 15->54 56 Machine Learning detection for dropped file 15->56
Detection:
cve-2017-11882-shellcode
Create hunting rule
Link:
https://mwdb.cert.pl/sample/ef30b686955d11c92ab89e6c5c5e4e61fc3d9797aca3d16d3011a1a6474847a6/
Threat name:
Document-Office.Exploit.CVE-2017-0199
Create hunting rule
Status:
Malicious
First seen:
2023-10-10 06:40:20 UTC
File Type:
Document
Extracted files:
13
AV detection:
9 of 38 (23.68%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=54ylnbuvlui4skvytzwfyxsomh6d3f4xvsr5c3jqcgq2mr2ii6ta._file
Result
Malware family:
n/a
Score:
  10/10
Tags:
n/a
Link:
https://tria.ge/reports/231010-p2xbfsde6y/
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 behavior: MapViewOfSection
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
Suspicious use of SetThreadContext
Checks computer location settings
Executes dropped EXE
Loads dropped DLL
Blocklisted process makes network request
Downloads MZ/PE file
Process spawned unexpected child process
Malware family:
XLoader
Create hunting rule
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/ef30b686955d/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/ef30b686955d11c92ab89e6c5c5e4e61fc3d9797aca3d16d3011a1a6474847a6

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: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:PE_Digital_Certificate
Create hunting rule
Author:albertzsigovits
Rule name:pe_no_import_table
Create hunting rule
Author:qux
Description:Detects exe does not have 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.

Comments