MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 595e795d2c8aeafe3af742ef4f2a404546d55ae58d966d88c3d2880074aab591. 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: 7


Intelligence 7 IOCs YARA 3 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 595e795d2c8aeafe3af742ef4f2a404546d55ae58d966d88c3d2880074aab591
SHA3-384 hash: 45e189fe5834d2dc6b28b3911e94c0be768e96a652d16a616922bd73bd943fb16e64e79096fbc4a8ccd5649e2a31d16f
SHA1 hash: 17784bbb9a63e836ee2c1d05cc26b773ad51a72d
MD5 hash: c444d11c01517f1ec52b63a6484bd512
humanhash: monkey-ack-spring-india
File name:3041000.xls
Download: download sample
Signature Formbook
Create hunting rule
File size:462'848 bytes
First seen:2020-10-07 05:54:25 UTC
Last seen:2020-10-07 06:48:15 UTC
File type:Excel file xls
MIME type:application/vnd.ms-excel
ssdeep 12288:L2+NJ9iY+2yy/RJVSjlWRKTZ01lQhO8M0KiT:L2+NJ9iYgqjABgeZiQ7pKiT
TLSH DCA422D3F9C3EE0BD94A473540EB81918B26FC21BFB1931B8285F31A5B707508E4A95E
Reporter abuse_ch
Tags:FormBook xls


Avatar
abuse_ch
Malspam distributing Formbook:

HELO: palermo.hosting-ar.com
Sending IP: 181.119.55.132
From: administracion@agropark.com.ar
Subject: Order
Attachment: 3041000.xls

Formbook payload URL:
http://18.196.157.86/T/3041000.jpg

Formbook C2:
http://www.funpexw.com/dmr/

Intelligence

File Origin
# of uploads :
2
# of downloads :
125
Origin country :
n/a
Vendor Threat Intelligence
Result
Verdict:
Malware
Maliciousness:

Behaviour
Creating a window
Using the Windows Management Instrumentation requests
Bypassing of proactive protection methods using Windows Management Instrumentation (WMI)
Launching a process by exploiting the app vulnerability
Result
Threat name:
FormBook
Create hunting rule
Detection:
malicious
Classification:
evad.troj
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/483766
Signature
.NET source code contains very large array initializations
Antivirus detection for URL or domain
Bypasses PowerShell execution policy
Creates an autostart registry key pointing to binary in C:\Windows
Creates processes via WMI
Document contains an embedded VBA with functions possibly related to ADO stream file operations
Downloads files with wrong headers with respect to MIME Content-Type
Drops PE files to the user root directory
Machine Learning detection for dropped file
Machine Learning detection for sample
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)
Powershell drops PE file
Sigma detected: Executables Started in Suspicious Folder
Sigma detected: Execution in Non-Executable Folder
Sigma detected: Suspicious Program Location Process Starts
Suspicious powershell command line found
Tries to detect virtualization through RDTSC time measurements
Yara detected FormBook
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 signatures2 2 Behavior Graph ID: 294291 Sample: 3041000.xls Startdate: 07/10/2020 Architecture: WINDOWS Score: 100 45 Malicious sample detected (through community Yara rule) 2->45 47 Antivirus detection for URL or domain 2->47 49 Multi AV Scanner detection for submitted file 2->49 51 12 other signatures 2->51 8 powershell.exe 14 21 2->8         started        13 EXCEL.EXE 31 23 2->13         started        15 pcalua.exe 1 1 2->15         started        17 pcalua.exe 1 2->17         started        process3 dnsIp4 43 18.196.157.86, 49713, 80 AMAZON-02US United States 8->43 41 C:\Users\Public\Pictures\hhnznbbfa.exe, PE32 8->41 dropped 67 Powershell drops PE file 8->67 19 hhnznbbfa.exe 8 8->19         started        23 conhost.exe 8->23         started        file5 signatures6 process7 file8 35 C:\Users\user\dgjh.exe, PE32 19->35 dropped 37 C:\Users\user\AppData\...\AddInProcess32.exe, PE32 19->37 dropped 39 C:\Users\user\AppData\Local\Temp\...\D.dll, PE32 19->39 dropped 53 Multi AV Scanner detection for dropped file 19->53 55 Machine Learning detection for dropped file 19->55 57 Drops PE files to the user root directory 19->57 59 Tries to detect virtualization through RDTSC time measurements 19->59 25 dgjh.exe 2 19->25         started        28 cmd.exe 1 19->28         started        signatures9 process10 signatures11 61 Multi AV Scanner detection for dropped file 25->61 63 Machine Learning detection for dropped file 25->63 65 Tries to detect virtualization through RDTSC time measurements 25->65 30 reg.exe 1 1 28->30         started        33 conhost.exe 28->33         started        process12 signatures13 69 Creates an autostart registry key pointing to binary in C:\Windows 30->69
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/595e795d2c8aeafe3af742ef4f2a404546d55ae58d966d88c3d2880074aab591/
Threat name:
Document-Office.Trojan.GenScript
Create hunting rule
Status:
Malicious
First seen:
2020-10-07 05:08:52 UTC
AV detection:
17 of 29 (58.62%)
Threat level:
  5/5
Detection(s):
Malicious file
Link:
https://check.spamhaus.org/check/?searchterm=lfphsxjmrlvp4oxxilxu6ksaivdnkwxfrwlg3cgd2keaa5fkwwiq._file
Result
Malware family:
formbook
Create hunting rule
Score:
  10/10
Tags:
rat persistence trojan spyware stealer family:formbook
Link:
https://tria.ge/reports/201007-1fxrasqtpe/
Behaviour
Suspicious behavior: AddClipboardFormatListener
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: MapViewOfSection
Suspicious use of AdjustPrivilegeToken
Suspicious use of SetWindowsHookEx
Suspicious use of WriteProcessMemory
Checks processor information in registry
Enumerates system info in registry
Office loads VBA resources, possible macro or embedded object present
Drops file in System32 directory
Suspicious use of SetThreadContext
Adds Run key to start application
Loads dropped DLL
Blacklisted process makes network request
Executes dropped EXE
Formbook Payload
Formbook
Process spawned unexpected child process
Malware Config
C2 Extraction:
http://www.funpexw.com/dmr/
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
DriveBy Activity
Score:
0.90
Link:
https://yomi.yoroi.company/submissions/595e795d2c8aeafe3af742ef4f2a404546d55ae58d966d88c3d2880074aab591

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:Formbook
Create hunting rule
Author:JPCERT/CC Incident Response Group
Description:detect Formbook in memory
Reference:internal research
Rule name:SharedStrings
Create hunting rule
Author:Katie Kleemola
Description:Internal names found in LURK0/CCTV0 samples
Rule name:win_formbook_auto
Create hunting rule
Author:Felix Bilstein - yara-signator at cocacoding dot com
Description:autogenerated rule brought to you by yara-signator

File information

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

Malspam

Formbook

Excel file xls 595e795d2c8aeafe3af742ef4f2a404546d55ae58d966d88c3d2880074aab591

(this sample)

  
URLhaus
https://urlhaus.abuse.ch/url/663536/
  
Delivery method
Distributed via e-mail attachment

Comments