MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 bffc9c0c74952c439ca980be37a1f1e21c182b13c992f1a345a541413bfea91a. 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: 10


Intelligence 10 IOCs YARA 2 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: bffc9c0c74952c439ca980be37a1f1e21c182b13c992f1a345a541413bfea91a
SHA3-384 hash: 44c8d0eae31216129842a0f91d40d0f8ca09bea541d7f7e836cf9c4c148cf8573e188878f4002830234fe5b3071ff2ed
SHA1 hash: e905675d92d1ee0d278796af59827b1231cc9d34
MD5 hash: 74bd3fc0782c84d45e5659a378f9dc01
humanhash: high-missouri-double-music
File name:25877920.jpg
Download: download sample
Signature Formbook
Create hunting rule
File size:417'792 bytes
First seen:2020-08-05 08:17:28 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'652 x AgentTesla, 19'463 x Formbook, 12'204 x SnakeKeylogger)
ssdeep 6144:LHAgbCa8sGQTpS1KzolRLNYXkw7W1ZA4s9m8HTVZ:LHX8kT8KznXkBskUTVZ
Threatray 4'963 similar samples on MalwareBazaar
TLSH 9D946C35AD93C038C5394974E4385BDAA6293A393BA0861EB3DA134C5F4329B7B1725F
Reporter abuse_ch
Tags:exe FormBook


Avatar
abuse_ch
Malspam distributing Formbook:

HELO: server.sagraagricola.com.br
Sending IP: 98.142.110.18
From: Danh Bopha <info@daunpenh.com>
Reply-To: sallykroff@gmail.com
Subject: URGENT RFQ-PO #50763
Attachment: RFQ-PO 50763.xls

FormBook payload URL:
http://www.daalu-tech.com/cgii/25877920.jpg

Intelligence

File Origin
# of uploads :
1
# of downloads :
68
Origin country :
n/a
Vendor Threat Intelligence
Detection:
Formbook
Create hunting rule
Link:
https://www.capesandbox.com/analysis/39177/
Detection(s):
SecuriteInfo.com.Heur.MSIL.Pretoria.1.31674.12551.UNOFFICIAL
Create hunting rule

Result
Verdict:
Malware
Maliciousness:

Behaviour
Creating a window
Sending a UDP request
Creating a file in the %temp% directory
Running batch commands
Launching a process
Creating a file
Creating a process from a recently created file
Enabling autorun with the standard Software\Microsoft\Windows\CurrentVersion\Run registry branch
Unauthorized injection to a recently created process
Result
Threat name:
FormBook
Create hunting rule
Detection:
malicious
Classification:
troj.evad
Score:
66 / 100
Link:
https://www.joesandbox.com/analysis/410525
Signature
.NET source code contains very large array initializations
Allocates memory in foreign processes
Creates an autostart registry key pointing to binary in C:\Windows
Drops PE files to the user root directory
Injects a PE file into a foreign processes
Malicious sample detected (through community Yara rule)
Maps a DLL or memory area into another process
Tries to detect virtualization through RDTSC time measurements
Writes to foreign memory regions
Yara detected FormBook
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 signatures2 2 Behavior Graph ID: 257526 Sample: 25877920.jpg Startdate: 05/08/2020 Architecture: WINDOWS Score: 66 42 Malicious sample detected (through community Yara rule) 2->42 44 Yara detected FormBook 2->44 46 .NET source code contains very large array initializations 2->46 8 25877920.exe 7 2->8         started        12 pcalua.exe 1 1 2->12         started        14 pcalua.exe 1 2->14         started        process3 file4 30 C:\Users\user\sogm.exe, PE32 8->30 dropped 32 C:\Users\user\AppData\...\AddInProcess32.exe, PE32 8->32 dropped 34 C:\Users\user\sogm.exe:Zone.Identifier, ASCII 8->34 dropped 54 Drops PE files to the user root directory 8->54 16 sogm.exe 3 8->16         started        19 cmd.exe 1 8->19         started        signatures5 process6 signatures7 36 Writes to foreign memory regions 16->36 38 Allocates memory in foreign processes 16->38 40 Injects a PE file into a foreign processes 16->40 21 AddInProcess32.exe 16->21         started        24 reg.exe 1 1 19->24         started        26 conhost.exe 19->26         started        process8 signatures9 48 Maps a DLL or memory area into another process 21->48 50 Tries to detect virtualization through RDTSC time measurements 21->50 28 explorer.exe 21->28 injected 52 Creates an autostart registry key pointing to binary in C:\Windows 24->52 process10
Detection:
formbook
Create hunting rule
Link:
https://mwdb.cert.pl/sample/bffc9c0c74952c439ca980be37a1f1e21c182b13c992f1a345a541413bfea91a/
Threat name:
ByteCode-MSIL.Trojan.Kryptik
Create hunting rule
Status:
Malicious
First seen:
2020-08-05 07:59:27 UTC
AV detection:
21 of 29 (72.41%)
Threat level:
  5/5
Detection(s):
Malicious file
Link:
https://check.spamhaus.org/check/?searchterm=x76jyddusuwehhfjqc7dpipr4iobqkytzgjpdi2fuvauco76vena._file
Verdict:
malicious
Label(s):
trickbot
Create hunting rule
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Formbook
353bbb86f2947091a4cd8c6e556570654b68b344cd73a3f22409c4b60106ab9c
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62afb1cbcacb77aa2ca99cc55c0e3536738415289f53c4a3a57d9b9cc08ee5ab
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b32579e01c28fc0a157f14ce8c679d02fcd1f5c03f8eef56ba6a77a627786d84
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c940837494435b53d54b6b4349031a14bf5db905a22b7601e34deb851b109715
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d4224f6f5b734de53a5a7e5f5675b05f9a808deb058e64d00859146f8255594c
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e86665f5f4cb843757815bce9f8311678c1bc32cdc6537ccc3aedc4502dca4a8
Formbook
f72897f4747769b169b5969fcde3b1b7ec92b79e0fb2e67a9d72650ac14c8d56
Formbook
+ 4'953 additional samples on MalwareBazaar
Result
Malware family:
formbook
Create hunting rule
Score:
  10/10
Tags:
rat spyware persistence trojan stealer family:formbook
Link:
https://tria.ge/reports/200805-6jztcj6rce/
Behaviour
Suspicious use of FindShellTrayWindow
Suspicious use of WriteProcessMemory
Suspicious use of SendNotifyMessage
Suspicious use of AdjustPrivilegeToken
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: MapViewOfSection
Modifies Internet Explorer settings
Drops file in Program Files directory
Suspicious use of SetThreadContext
Adds Run key to start application
Loads dropped DLL
Reads user/profile data of web browsers
Executes dropped EXE
Formbook Payload
Formbook
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Kryptik
Score:
0.70
Link:
https://yomi.yoroi.company/submissions/bffc9c0c74952c439ca980be37a1f1e21c182b13c992f1a345a541413bfea91a

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: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 68a15fc671dda2b81df8d07fbfaef5f019a4887b4dfda9171672cbdd3c8c449a

Formbook

Executable exe bffc9c0c74952c439ca980be37a1f1e21c182b13c992f1a345a541413bfea91a

(this sample)

  
URLhaus
https://urlhaus.abuse.ch/url/424618/
  
Dropped by
MD5 afdffec2acf4e6756e260ecc77f8521f
  
Dropped by
SHA256 68a15fc671dda2b81df8d07fbfaef5f019a4887b4dfda9171672cbdd3c8c449a
  
Delivery method
Distributed via web download
Cape
Cape
https://www.capesandbox.com/analysis/39177/

Comments