MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 93129fbf583ce2e637e0a21c490a549e1597902179636ebc13a7c937b5707782. 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 1 File information Comments
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SHA256 hash: 93129fbf583ce2e637e0a21c490a549e1597902179636ebc13a7c937b5707782
SHA3-384 hash: 8357f4362c5f2c14daf9a2965b0e1ae8f814828ee1c91979e16b4aa2cb4e150e75f26869766b995caa7691260393f105
SHA1 hash: 71ff6cff03c018baf816bd4d696ce348a5e35277
MD5 hash: 5b51fd5c0bf460270094853a7bcdb803
humanhash: september-timing-xray-lion
File name:DNLXA2009012.xls
Download: download sample
Signature Formbook
Create hunting rule
File size:312'832 bytes
First seen:2020-10-05 14:24:27 UTC
Last seen:Never
File type:Excel file xls
MIME type:application/vnd.ms-excel
ssdeep 6144:Hk3hOdsylKlgryzc4bNhZF+E+W2knwPJVbTc0i+VLvuD+ktw5ljqv2til0dJdpa5:H9Q+mSxbtiaPdpC8ccnXw
TLSH 5D641293B6D9D546DE2727311CEB48804712FC669EB7939AB212FB081FB37D4521223B
Reporter abuse_ch
Tags:FormBook xls


Avatar
abuse_ch
Malspam distributing Formbook:

HELO: dfl0.503.mulxi.ml
Sending IP: 159.89.4.172
From: Aaron Zhang <sales@graepels.com>
Subject: Proforma Invoice
Attachment: DNLXA2009012.xls

Formbook payload URL:
http://192.236.178.80/7z/bin-cyber.jpg

Intelligence

File Origin
# of uploads :
1
# of downloads :
140
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/481639
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 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: 293249 Sample: DNLXA2009012.xls Startdate: 05/10/2020 Architecture: WINDOWS Score: 100 46 Malicious sample detected (through community Yara rule) 2->46 48 Antivirus detection for URL or domain 2->48 50 Multi AV Scanner detection for submitted file 2->50 52 12 other signatures 2->52 8 powershell.exe 14 21 2->8         started        13 pcalua.exe 1 2->13         started        15 EXCEL.EXE 31 23 2->15         started        17 pcalua.exe 1 1 2->17         started        process3 dnsIp4 44 192.236.178.80, 49731, 80 HOSTWINDSUS United States 8->44 42 C:\Users\Public\fxuckjqee.exe, PE32 8->42 dropped 60 Drops PE files to the user root directory 8->60 62 Powershell drops PE file 8->62 19 fxuckjqee.exe 8 8->19         started        23 conhost.exe 8->23         started        25 chrmo.exe 3 13->25         started        file5 signatures6 process7 file8 36 C:\Users\user\chrmo.exe, PE32 19->36 dropped 38 C:\Users\user\AppData\...\AddInProcess32.exe, PE32 19->38 dropped 40 C:\Users\user\AppData\Local\Temp\...\f.dll, PE32 19->40 dropped 54 Multi AV Scanner detection for dropped file 19->54 56 Drops PE files to the user root directory 19->56 58 Tries to detect virtualization through RDTSC time measurements 19->58 27 cmd.exe 1 19->27         started        29 chrmo.exe 19->29         started        signatures9 process10 process11 31 reg.exe 1 1 27->31         started        34 conhost.exe 27->34         started        signatures12 64 Creates an autostart registry key pointing to binary in C:\Windows 31->64
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/93129fbf583ce2e637e0a21c490a549e1597902179636ebc13a7c937b5707782/
Threat name:
Script-Macro.Trojan.Heuristic
Create hunting rule
Status:
Malicious
First seen:
2020-10-05 13:14:13 UTC
AV detection:
6 of 48 (12.50%)
Threat level:
  2/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=smjj7p2yhtromn7auioescsutykzpebbpfrw5patu7etpnlqo6ba._file
Result
Malware family:
formbook
Create hunting rule
Score:
  10/10
Tags:
rat persistence trojan spyware stealer family:formbook
Link:
https://tria.ge/reports/201005-8xahmhq64a/
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
Suspicious use of FindShellTrayWindow
Office loads VBA resources, possible macro or embedded object present
Program crash
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://d�wR��}��QvWV4�����%k!XtqU��1\ �
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Dropper
Score:
0.80
Link:
https://yomi.yoroi.company/submissions/93129fbf583ce2e637e0a21c490a549e1597902179636ebc13a7c937b5707782

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:SharedStrings
Create hunting rule
Author:Katie Kleemola
Description:Internal names found in LURK0/CCTV0 samples

File information

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

Malspam

Formbook

Excel file xls 93129fbf583ce2e637e0a21c490a549e1597902179636ebc13a7c937b5707782

(this sample)

  
URLhaus
https://urlhaus.abuse.ch/url/655360/
  
Delivery method
Distributed via e-mail attachment

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