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MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 405c6ef30357c9ef5c53787a35f2c20c3311d835eb2d15f61038005efcd19c3c. 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


GuLoader


Vendor detections: 12


Maldoc score: 4


Intelligence 12 IOCs YARA 18 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 405c6ef30357c9ef5c53787a35f2c20c3311d835eb2d15f61038005efcd19c3c
SHA3-384 hash: 6a39cc24a489e96855ec14bd2b62b4aa97ff16b4bf279e3aac40c04b0f0e71e323248664964fc64a3f6339108facce1b
SHA1 hash: 0854fb6b39a577740f7932a70bc16dec9577a963
MD5 hash: 5471685d3dce7101f0aaa65864318158
humanhash: whiskey-alpha-vegan-xray
File name:Pepsico LLC RFQ Information.xls
Download: download sample
Signature GuLoader
Create hunting rule
File size:638'976 bytes
First seen:2023-12-13 12:18:35 UTC
Last seen:Never
File type:Excel file xls
MIME type:application/vnd.ms-excel
ssdeep 12288:EMe0yk/R5zXJz8Jn6pa0zxGHxarWsDplif0gPhwA30uIlM/Q5WqSTDeA:EMeo/R5zXJAJ6paCxGHBsDAphwA30uI1
TLSH T101D41209F591EE2BDC23A434C8CEF5C6D228BC552F50D70F71C6B75D88B2AB60266B94
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:GuLoader 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 17 sections in this file using oledump:

Section IDSection sizeSection name
1114 bytesCompObj
2244 bytesDocumentSummaryInformation
3200 bytesSummaryInformation
499 bytesMBD000243BD/CompObj
522199 bytesMBD000243BD/Package
699 bytesMBD000243BE/CompObj
7313419 bytesMBD000243BE/Package
8836 bytesMBD000243BF/Ole
9282538 bytesWorkbook
10535 bytes_VBA_PROJECT_CUR/PROJECT
11104 bytes_VBA_PROJECT_CUR/PROJECTwm
12977 bytes_VBA_PROJECT_CUR/VBA/Sheet1
13977 bytes_VBA_PROJECT_CUR/VBA/Sheet2
14977 bytes_VBA_PROJECT_CUR/VBA/Sheet3
15985 bytes_VBA_PROJECT_CUR/VBA/ThisWorkbook
162644 bytes_VBA_PROJECT_CUR/VBA/_VBA_PROJECT
17553 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 :
322
Origin country :
NL NL
Vendor Threat Intelligence
Verdict:
Legit
File type:
application/vnd.ms-excel
Has a screenshot:
False
Contains macros:
False
Detection:
n/a
Link:
https://www.capesandbox.com/analysis/467166/
Detection(s):
SecuriteInfo.com.Heur.13221.20016.UNOFFICIAL
Create hunting rule

TwinWave.EvilDoc.FormBookPicturesOfU.XL.221111.UNOFFICIAL
Create hunting rule

SecuriteInfo.com.Other.Malware-gen.19728.9505.UNOFFICIAL
Create hunting rule

TwinWave.EvilDoc.FormBookPicturesOfU.ZIP.221111.UNOFFICIAL
Create hunting rule

Sanesecurity.Badmacro.Xls.BadUsr1.UNOFFICIAL
Create hunting rule

SecuriteInfo.com.Trojan.VBA.Agent-16.UNOFFICIAL
Create hunting rule

Sanesecurity.Badmacro.Xls.badForm2.UNOFFICIAL
Create hunting rule

TwinWave.EvilDoc.FormBookPicturesOfU.MSOLE2.221111.UNOFFICIAL
Create hunting rule

Result
Verdict:
Malware
Maliciousness:

Behaviour
Searching for the window
Creating a window
Searching for synchronization primitives
Launching a process
Сreating synchronization primitives
Sending an HTTP GET request
Launching a process by exploiting the app vulnerability
Result
Verdict:
Malicious
File Type:
Legacy Excel File with Macro
Link:
https://app.docguard.net/405c6ef30357c9ef5c53787a35f2c20c3311d835eb2d15f61038005efcd19c3c/results/dashboard
Payload URLs
URL
File name
http://172.245.208.4/wfe/microsoftdecidedtoupdateentirethingsfromthepcfordletehistorycachecookiefromthepc.Doc
Embedded Ole
Behaviour
SuspiciousRTF detected
Document image
Image:
Download PNG
Document image
Verdict:
Malicious
Threat level:
  10/10
Confidence:
100%
Tags:
macros
Link:
https://www.filescan.io/uploads/6579a1403f60a8103490b4fd/reports/603edb7d-e1a6-486e-99a4-233c3c40a852/overview
Verdict:
Malicious
Labled as:
CVE-2017-0199
Link:
https://www.hybrid-analysis.com/sample/405c6ef30357c9ef5c53787a35f2c20c3311d835eb2d15f61038005efcd19c3c
Label:
Benign
Suspicious Score:
/10
Score Malicious:
1%
Score Benign:
99%
Link:
https://www.malware.ai/gui/files/?id=d9c95b20-4b25-4cbd-b47f-ac962fa4a9d7
Result
Threat name:
FormBook, GuLoader
Create hunting rule
Detection:
malicious
Classification:
troj.spyw.expl.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1361352
Signature
Antivirus detection for dropped file
Antivirus detection for URL or domain
DLL side loading technique detected
Document embeds suspicious OLE2 link
Excel sheet contains many unusual embedded objects
Installs new ROOT certificates
Machine Learning detection for dropped file
Malicious sample detected (through community Yara rule)
Maps a DLL or memory area into another process
Microsoft Office drops suspicious files
Microsoft Office launches external ms-search protocol handler (WebDAV)
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
Performs DNS queries to domains with low reputation
Queues an APC in another process (thread injection)
Sample uses process hollowing technique
Searches for Windows Mail specific files
Shellcode detected
Sigma detected: EQNEDT32.EXE connecting to internet
Sigma detected: File Dropped By EQNEDT32EXE
Suspicious powershell command line found
Tries to harvest and steal browser information (history, passwords, etc)
Tries to steal Mail credentials (via file / registry access)
Very long command line found
Writes to foreign memory regions
Yara detected FormBook
Yara detected GuLoader
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 signatures2 2 Behavior Graph ID: 1361352 Sample: Pepsico_LLC_RFQ_Information.xls Startdate: 13/12/2023 Architecture: WINDOWS Score: 100 85 Malicious sample detected (through community Yara rule) 2->85 87 Antivirus detection for URL or domain 2->87 89 Antivirus detection for dropped file 2->89 91 11 other signatures 2->91 12 EQNEDT32.EXE 12 2->12         started        16 WINWORD.EXE 346 53 2->16         started        18 EXCEL.EXE 58 62 2->18         started        21 AcroRd32.exe 2->21         started        process3 dnsIp4 54 C:\Users\user\AppData\Roaming\wlanext.exe, PE32 12->54 dropped 56 C:\Users\user\AppData\...\wlanext[1].exe, PE32 12->56 dropped 113 Office equation editor establishes network connection 12->113 115 Office equation editor starts processes (likely CVE 2017-11882 or CVE-2018-0802) 12->115 23 wlanext.exe 9 43 12->23         started        58 C:\Users\user\...\wfe on 172.245.208.4.url, MS 16->58 dropped 60 microsoftdecidedto...iefromthepc.Doc.url, MS 16->60 dropped 62 ~WRF{216309E3-F8E3...2-EFC13A42B9E0}.tmp, Composite 16->62 dropped 64 C:\Users\user\AppData\Local\...\802DBB33.doc, ISO-8859 16->64 dropped 117 Microsoft Office launches external ms-search protocol handler (WebDAV) 16->117 119 Office viewer loads remote template 16->119 121 Microsoft Office drops suspicious files 16->121 74 172.245.208.4, 49164, 49165, 49166 AS-COLOCROSSINGUS United States 18->74 66 C:\Users\user\...\~DF4022384D0D93286A.TMP, Composite 18->66 dropped 68 microsoftdecidedto...kiefromthepc[1].doc, ISO-8859 18->68 dropped file5 signatures6 process7 file8 50 C:\Users\user\AppData\...\ornithorhynchus.sen, COM 23->50 dropped 99 Machine Learning detection for dropped file 23->99 27 powershell.exe 5 23->27         started        signatures9 process10 signatures11 109 Suspicious powershell command line found 27->109 111 Very long command line found 27->111 30 powershell.exe 2 27->30         started        process12 signatures13 123 Searches for Windows Mail specific files 30->123 125 Writes to foreign memory regions 30->125 33 wab.exe 9 30->33         started        process14 dnsIp15 70 www.synergyinnovationgroup.com 33->70 72 synergyinnovationgroup.com 65.60.36.22, 443, 49172 SINGLEHOP-LLCUS United States 33->72 93 Installs new ROOT certificates 33->93 95 Maps a DLL or memory area into another process 33->95 37 yxiYOLDmcMDjfXENmmsjolwLVoF.exe 33->37 injected signatures16 process17 signatures18 97 Maps a DLL or memory area into another process 37->97 40 auditpol.exe 37->40         started        process19 dnsIp20 76 www.sqlite.org 45.33.6.223, 49174, 80 LINODE-APLinodeLLCUS United States 40->76 52 C:\Users\user\AppData\Local\...\sqlite3.dll, PE32 40->52 dropped 101 Tries to steal Mail credentials (via file / registry access) 40->101 103 Tries to harvest and steal browser information (history, passwords, etc) 40->103 105 Maps a DLL or memory area into another process 40->105 107 3 other signatures 40->107 45 yxiYOLDmcMDjfXENmmsjolwLVoF.exe 40->45 injected 48 firefox.exe 40->48         started        file21 signatures22 process23 dnsIp24 78 www.zenithdash.xyz 45->78 81 www.zenithdash.xyz 162.0.225.191, 49183, 49184, 80 NAMECHEAP-NETUS Canada 45->81 83 4 other IPs or domains 45->83 signatures25 127 Performs DNS queries to domains with low reputation 78->127
Detection:
cve-2017-11882-shellcode
Create hunting rule
Link:
https://mwdb.cert.pl/sample/405c6ef30357c9ef5c53787a35f2c20c3311d835eb2d15f61038005efcd19c3c/
Threat name:
Document-Excel.Exploit.CVE-2017-0199
Create hunting rule
Status:
Malicious
First seen:
2023-12-12 08:18:30 UTC
File Type:
Document
Extracted files:
91
AV detection:
15 of 37 (40.54%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=ibog54ydk7e66xctpb5dl4wcbqzrdwbv5mwrl5qqhaaf57grtq6a._file
Result
Malware family:
guloader
Create hunting rule
Score:
  10/10
Tags:
family:guloader downloader
Link:
https://tria.ge/reports/231213-pg7axscedr/
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
Enumerates physical storage devices
Drops file in Program Files directory
Drops file in Windows directory
Suspicious use of NtSetInformationThreadHideFromDebugger
Suspicious use of SetThreadContext
Abuses OpenXML format to download file from external location
Executes dropped EXE
Loads dropped DLL
Blocklisted process makes network request
Downloads MZ/PE file
Guloader,Cloudeye
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/405c6ef30357/report/overview.html
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Malicious File
Score:
0.70
Link:
https://yomi.yoroi.company/submissions/405c6ef30357c9ef5c53787a35f2c20c3311d835eb2d15f61038005efcd19c3c

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: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

GuLoader

Excel file xls 405c6ef30357c9ef5c53787a35f2c20c3311d835eb2d15f61038005efcd19c3c

(this sample)

  
Delivery method
Distributed via e-mail attachment
Cape
Cape
https://www.capesandbox.com/analysis/467166/

Comments