MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 27d2b399871c8d36ef2bb51a869cff8360c0bf692b480fbdea85724745475fb9. 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: 14


Maldoc score: 4


Intelligence 14 IOCs YARA 5 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 27d2b399871c8d36ef2bb51a869cff8360c0bf692b480fbdea85724745475fb9
SHA3-384 hash: 21b9296d057ef1e19790e9faeb958bcf1ba90cfdca971c880c2d0d58f2d4da7c28a18c968367cd39a193dc3f3f3ad9c5
SHA1 hash: ee9f6396934bca243adba63a593f54de69ab46b2
MD5 hash: 900ce487607c0ca180df6378d096be59
humanhash: zulu-august-oregon-sad
File name:Quotation.xls
Download: download sample
Signature Formbook
Create hunting rule
File size:1'213'440 bytes
First seen:2023-11-27 10:33:11 UTC
Last seen:Never
File type:Excel file xls
MIME type:application/vnd.ms-excel
ssdeep 24576:4w6/UZyaCfg8W6yQw6/DZygCfg8W79LbPJdnbbuzCr7kC:z6/Gv/x6/Fr/h3PJdnvwi
TLSH T12945F0079808CB87C02D83F97E534DE91F0A7F19E1817EEF04667F9B3A75A22499A11D
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:CVE-2017-11882 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 id
Maldoc score: 4
OLE dump

MalwareBazaar was able to identify 33 sections in this file using oledump:

Section IDSection sizeSection name
1114 bytesCompObj
2244 bytesDocumentSummaryInformation
3200 bytesSummaryInformation
494 bytesMBD0021A570/CompObj
562 bytesMBD0021A570/Ole
620409 bytesMBD0021A570/CONTENTS
794 bytesMBD0021A571/CompObj
862 bytesMBD0021A571/Ole
964830 bytesMBD0021A571/CONTENTS
1093 bytesMBD0021A572/CompObj
1164 bytesMBD0021A572/Ole
12124841 bytesMBD0021A572/CONTENTS
1399 bytesMBD0021A573/CompObj
14187496 bytesMBD0021A573/Package
1594 bytesMBD0021A574/CompObj
1662 bytesMBD0021A574/Ole
1764830 bytesMBD0021A574/CONTENTS
1893 bytesMBD0021A575/CompObj
1964 bytesMBD0021A575/Ole
20124841 bytesMBD0021A575/CONTENTS
2199 bytesMBD0021A576/CompObj
22187476 bytesMBD0021A576/Package
231681 bytesMBD0021A577/OlE10natIve
2420 bytesMBD0021A577/Ole
25408508 bytesWorkbook
26527 bytes_VBA_PROJECT_CUR/PROJECT
27104 bytes_VBA_PROJECT_CUR/PROJECTwm
28977 bytes_VBA_PROJECT_CUR/VBA/Sheet1
29977 bytes_VBA_PROJECT_CUR/VBA/Sheet2
30977 bytes_VBA_PROJECT_CUR/VBA/Sheet3
31985 bytes_VBA_PROJECT_CUR/VBA/ThisWorkbook
322644 bytes_VBA_PROJECT_CUR/VBA/_VBA_PROJECT
33553 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 :
351
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/460609/
Detection(s):
SecuriteInfo.com.Other.Malware-gen.19728.9505.UNOFFICIAL
Create hunting rule

SecuriteInfo.com.Heur.1282.16692.UNOFFICIAL
Create hunting rule

SecuriteInfo.com.Other.Malware-gen.25106.3990.UNOFFICIAL
Create hunting rule

Sanesecurity.Shelter.Malware.BadMacro.BadOleNatEquat.UNOFFICIAL
Create hunting rule

TwinWave.EvilDoc.EQAndMisCasedOleNativeWasTheCaseThatTheyGaveMe.20200215.UNOFFICIAL
Create hunting rule

Result
Verdict:
Malware
Maliciousness:

Behaviour
Searching for the window
Creating a window
Searching for synchronization primitives
Launching a process
Creating a file in the %AppData% directory
Сreating synchronization primitives
Sending an HTTP GET request
Creating a process from a recently created file
Result
Verdict:
Malicious
File Type:
Legacy Excel File with Macro
Link:
https://app.docguard.net/27d2b399871c8d36ef2bb51a869cff8360c0bf692b480fbdea85724745475fb9/results/dashboard
Behaviour
BlacklistAPI detected
Document image
Image:
Download PNG
Document image
Verdict:
Malicious
Threat level:
  10/10
Confidence:
100%
Tags:
embedequation exploit exploit macros packed shellcode
Link:
https://www.filescan.io/uploads/656470a16d3af1922672be78/reports/196ca471-a567-4fad-b9f5-70ecb8d756bf/overview
Verdict:
Malicious
Labled as:
CVE-2018-0802
Link:
https://www.hybrid-analysis.com/sample/27d2b399871c8d36ef2bb51a869cff8360c0bf692b480fbdea85724745475fb9
Label:
Benign
Suspicious Score:
2.4/10
Score Malicious:
25%
Score Benign:
75%
Link:
https://www.malware.ai/gui/files/?id=8a09dda4-9754-486e-98e3-f20e1a429078
Result
Verdict:
MALICIOUS
Link:
https://labs.inquest.net/dfi/sha256/27d2b399871c8d36ef2bb51a869cff8360c0bf692b480fbdea85724745475fb9
Result
Threat name:
FormBook
Create hunting rule
Detection:
malicious
Classification:
troj.expl.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1348437
Signature
.NET source code contains potential unpacker
.NET source code contains very large array initializations
Antivirus / Scanner detection for submitted sample
Antivirus detection for URL or domain
C2 URLs / IPs found in malware configuration
Excel sheet contains many unusual embedded objects
Found malware configuration
Injects a PE file into a foreign processes
Machine Learning detection for dropped file
Malicious sample detected (through community Yara rule)
Maps a DLL or memory area into another process
Modifies the context of a thread in another process (thread injection)
Modifies the prolog of user mode functions (user mode inline hooks)
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)
Queues an APC in another process (thread injection)
Sample uses process hollowing technique
Shellcode detected
Sigma detected: EQNEDT32.EXE connecting to internet
Sigma detected: File Dropped By EQNEDT32EXE
Snort IDS alert for network traffic
System process connects to network (likely due to code injection or exploit)
Tries to detect virtualization through RDTSC time measurements
Uses netstat to query active network connections and open ports
Yara detected FormBook
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 signatures2 2 Behavior Graph ID: 1348437 Sample: Quotation.xls Startdate: 27/11/2023 Architecture: WINDOWS Score: 100 61 Snort IDS alert for network traffic 2->61 63 Found malware configuration 2->63 65 Malicious sample detected (through community Yara rule) 2->65 67 17 other signatures 2->67 10 EQNEDT32.EXE 12 2->10         started        15 EQNEDT32.EXE 11 2->15         started        17 AcroRd32.exe 27 2->17         started        19 EXCEL.EXE 58 62 2->19         started        process3 dnsIp4 59 103.29.3.200, 49165, 80 NINENETWORKS-KHSATURNHOLDINGSLIMITEDKH unknown 10->59 45 C:\Users\user\AppData\Roaming\wlanext.exe, PE32 10->45 dropped 47 C:\Users\user\AppData\...\wininit[1].exe, PE32 10->47 dropped 87 Office equation editor establishes network connection 10->87 89 Office equation editor starts processes (likely CVE 2017-11882 or CVE-2018-0802) 10->89 21 wlanext.exe 2 10->21         started        24 wlanext.exe 15->24         started        26 RdrCEF.exe 17->26         started        file5 signatures6 process7 signatures8 73 Multi AV Scanner detection for dropped file 21->73 75 Machine Learning detection for dropped file 21->75 77 Tries to detect virtualization through RDTSC time measurements 21->77 28 wlanext.exe 21->28         started        79 Injects a PE file into a foreign processes 24->79 31 wlanext.exe 24->31         started        process9 signatures10 91 Modifies the context of a thread in another process (thread injection) 28->91 93 Maps a DLL or memory area into another process 28->93 95 Sample uses process hollowing technique 28->95 97 Queues an APC in another process (thread injection) 28->97 33 explorer.exe 4 6 28->33 injected process11 dnsIp12 49 www.shop-pravaonline.online 33->49 51 www.piabellacasino347.com 33->51 53 4 other IPs or domains 33->53 69 System process connects to network (likely due to code injection or exploit) 33->69 71 Uses netstat to query active network connections and open ports 33->71 37 NETSTAT.EXE 9 33->37         started        41 mstsc.exe 33->41         started        signatures13 process14 dnsIp15 55 www.fnb.gay 37->55 57 192.168.2.255, 137, 138 unknown unknown 37->57 81 Modifies the context of a thread in another process (thread injection) 37->81 83 Maps a DLL or memory area into another process 37->83 85 Tries to detect virtualization through RDTSC time measurements 37->85 43 cmd.exe 37->43         started        signatures16 process17
Detection:
formbook
Create hunting rule
Link:
https://mwdb.cert.pl/sample/27d2b399871c8d36ef2bb51a869cff8360c0bf692b480fbdea85724745475fb9/
Threat name:
Document-Office.Exploit.CVE-2017-11882
Create hunting rule
Status:
Malicious
First seen:
2023-11-27 06:55:04 UTC
File Type:
Document
Extracted files:
118
AV detection:
13 of 37 (35.14%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=e7jlhgmhdsgtn3zlwuninhh7qnqmbp3jfnea7ppkqvzeorkhl64q._file
Result
Malware family:
formbook
Create hunting rule
Score:
  10/10
Tags:
family:formbook campaign:bp31 rat spyware stealer trojan
Link:
https://tria.ge/reports/231127-ml5xjsfh8w/
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 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
Program crash
Suspicious use of SetThreadContext
Executes dropped EXE
Loads dropped DLL
Blocklisted process makes network request
Downloads MZ/PE file
Formbook payload
Formbook
Malware family:
FormBook
Create hunting rule
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/27d2b399871c/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/27d2b399871c8d36ef2bb51a869cff8360c0bf692b480fbdea85724745475fb9

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
Create hunting rule
Author:ditekSHen
Description:detects OLE documents potentially exploiting CVE-2017-11882
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:office_document_vba
Create hunting rule
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

Formbook

Excel file xls 27d2b399871c8d36ef2bb51a869cff8360c0bf692b480fbdea85724745475fb9

(this sample)

  
Delivery method
Distributed via e-mail attachment
Cape
Cape
https://www.capesandbox.com/analysis/460609/

Comments