MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 831f79faeff5bd6704c5aca840f3067b4762e5b6e6228b04221ccf351b146da7. 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: 15


Intelligence 15 IOCs YARA 4 File information Comments
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SHA256 hash: 831f79faeff5bd6704c5aca840f3067b4762e5b6e6228b04221ccf351b146da7
SHA3-384 hash: f7ab8b96bb939cba3d9111d2d08be88ea7acdcbf830c451939852fbe9f16fd1d577d4d08c5e61df86593b77422cee54f
SHA1 hash: 4e308193cbfbd8fcb9db9bc4f54344d5e211aab0
MD5 hash: ebe9f0088ca1b2466ff96453affd3792
humanhash: three-asparagus-eleven-alabama
File name:vbc.exe
Download: download sample
Signature Formbook
Create hunting rule
File size:748'544 bytes
First seen:2022-02-23 14:54:30 UTC
Last seen:2022-02-23 17:15:01 UTC
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'749 x AgentTesla, 19'653 x Formbook, 12'246 x SnakeKeylogger)
ssdeep 12288:JFiMwITspGFz4B9ECZMG8jOJbsqSblneISTmU9PQWPJuRBkui2obOS/21ly5VeOr:JFcITUQz43pkjO9sqSt2dP3hunwa1NPE
Threatray 13'534 similar samples on MalwareBazaar
TLSH T1D1F423F15BAC137ED5630B72C1163B6263ADA61BEC4EBF1805B264BD1C026854E13DBB
Reporter James_inthe_box
Tags:exe FormBook

Intelligence

File Origin
# of uploads :
2
# of downloads :
217
Origin country :
n/a
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
20220223_STALMA_SA.xlsx
Verdict:
Malicious activity
Analysis date:
2022-02-23 23:09:50 UTC
Tags:
encrypted opendir exploit CVE-2017-11882 loader
Link:
https://app.any.run/tasks/4226d6c6-9659-4b15-b324-c6b6af05d132

Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Detection:
Formbook
Create hunting rule
Link:
https://www.capesandbox.com/analysis/243832/
Detection(s):
SecuriteInfo.com.W32.MSIL_Agent.CPA.genEldorado.32708.10280.UNOFFICIAL
Create hunting rule

Result
Verdict:
Malware
Maliciousness:

Behaviour
Searching for the window
Adding an access-denied ACE
Using the Windows Management Instrumentation requests
Launching a process
Сreating synchronization primitives
Searching for synchronization primitives
Creating a file
Launching cmd.exe command interpreter
Sending a custom TCP request
DNS request
Sending an HTTP GET request
Unauthorized injection to a system process
Verdict:
Likely Malicious
Threat level:
  7.5/10
Confidence:
100%
Tags:
obfuscated packed remote.exe replace.exe
Link:
https://www.filescan.io/uploads/62164acf875593a3cc0b22d9/reports/d1f0c72a-12ba-4788-95af-ec5c20c3c42f/overview
Result
Verdict:
UNKNOWN
Details
Windows PE Executable
Found a Windows Portable Executable (PE) binary. Depending on context, the presence of a binary is suspicious or malicious.
Malware family:
Formbook
Create hunting rule
Verdict:
Malicious
Link:
https://analyze.intezer.com/analyses/9cbeda3c-bc16-4cfa-a073-e79b56cdfb44
Result
Threat name:
FormBook
Create hunting rule
Detection:
malicious
Classification:
troj.expl.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/945047
Signature
.NET source code references suspicious native API functions
Antivirus detection for URL or domain
C2 URLs / IPs found in malware configuration
Contains functionality to hide user accounts
Found malware configuration
Machine Learning detection for sample
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)
Multi AV Scanner detection for submitted file
Queries sensitive video device information (via WMI, Win32_VideoController, often done to detect virtual machines)
Queues an APC in another process (thread injection)
Sample uses process hollowing technique
Snort IDS alert for network traffic (e.g. based on Emerging Threat rules)
System process connects to network (likely due to code injection or exploit)
Tries to detect sandboxes and other dynamic analysis tools (process name or module or function)
Tries to detect virtualization through RDTSC time measurements
Yara detected AntiVM3
Yara detected FormBook
Yara detected UAC Bypass using CMSTP
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 577528 Sample: vbc.exe Startdate: 23/02/2022 Architecture: WINDOWS Score: 100 31 www.northgrowcookeat.com 2->31 33 northgrowcookeat.com 2->33 35 www.xn--9ckxaq4nx19lv6zc.com 2->35 41 Snort IDS alert for network traffic (e.g. based on Emerging Threat rules) 2->41 43 Found malware configuration 2->43 45 Malicious sample detected (through community Yara rule) 2->45 47 10 other signatures 2->47 11 vbc.exe 1 2->11         started        signatures3 process4 file5 29 C:\Users\user\AppData\Local\...\vbc.exe.log, ASCII 11->29 dropped 57 Queries sensitive video device information (via WMI, Win32_VideoController, often done to detect virtual machines) 11->57 15 newdev.exe 11->15         started        signatures6 process7 signatures8 59 Modifies the context of a thread in another process (thread injection) 15->59 61 Maps a DLL or memory area into another process 15->61 63 Sample uses process hollowing technique 15->63 65 2 other signatures 15->65 18 explorer.exe 15->18 injected process9 dnsIp10 37 www.johan-veenstra.com 141.138.169.237, 49810, 80 ANTAGONIST-ASNL Netherlands 18->37 39 www.5456456655ere.com 18->39 49 System process connects to network (likely due to code injection or exploit) 18->49 22 wscript.exe 18->22         started        signatures11 process12 signatures13 51 Modifies the context of a thread in another process (thread injection) 22->51 53 Maps a DLL or memory area into another process 22->53 55 Tries to detect virtualization through RDTSC time measurements 22->55 25 cmd.exe 1 22->25         started        process14 process15 27 conhost.exe 25->27         started       
Detection:
xloader
Create hunting rule
Link:
https://mwdb.cert.pl/sample/831f79faeff5bd6704c5aca840f3067b4762e5b6e6228b04221ccf351b146da7/
Threat name:
Win32.Trojan.FormBook
Create hunting rule
Status:
Malicious
First seen:
2022-02-23 14:53:31 UTC
File Type:
PE (.Net Exe)
Extracted files:
4
AV detection:
23 of 28 (82.14%)
Threat level:
  5/5
Detection(s):
Malicious file
Link:
https://check.spamhaus.org/check/?searchterm=qmpxt6xp6w6wobgfvsueb4ygpndwfznw4yriwbbcdthtkgyunwtq._file
Verdict:
malicious
Label(s):
formbook
Create hunting rule
Similar samples:
0b7b92e40a75e7c96676e65733f2babfdf0c37529c130619510b2b0b7879a697
Formbook
0da36b7f7e4b44b640ab5769532fdd7599032ca2b1d6b57807ba48ad1fa76780
Formbook
204831bda7d04f0905f7bf0c39e45b3772935726d8a436ee9703a19098b37e21
Formbook
2c13447326df9da1edb4700336d4cf841f7575b7505df68ef2ae7bdb6f2d9f5c
Formbook
705bf99df489a6945a540499bc8c6d7b7564d9a255629e326013d4a85bb77a78
Formbook
7eb60b42eb8755d31d411c32b45f7431eb9e084fb0749d92c83ffe2598b6564c
Formbook
9050768f69225078f05d535401510a5b361dd071430e40639e869c7247621908
Formbook
d8842d4c311c9e35f77ef0ee038f34061be70a55b38f949e0624d32e5a6a4212
Formbook
f16768c3348ef6a7bde4d734eb1f407fe577d709bca21b0526ded6065be7cc92
Formbook
+ 13'524 additional samples on MalwareBazaar
Result
Malware family:
xloader
Create hunting rule
Score:
  10/10
Tags:
family:xloader campaign:nazb evasion loader rat suricata
Link:
https://tria.ge/reports/220223-saf2yabhaq/
Behaviour
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: GetForegroundWindowSpam
Suspicious behavior: MapViewOfSection
Suspicious use of AdjustPrivilegeToken
Suspicious use of FindShellTrayWindow
Suspicious use of SendNotifyMessage
Suspicious use of WriteProcessMemory
Suspicious use of SetThreadContext
Maps connected drives based on registry
Checks BIOS information in registry
Uses the VBS compiler for execution
Looks for VMWare Tools registry key
Looks for VirtualBox Guest Additions in registry
Xloader Payload
Xloader
suricata: ET MALWARE FormBook CnC Checkin (GET)
Unpacked files
SH256 hash:
2480daf5c0c6437aa4c4632996ddeb9665c60906d28c3800aa5f713b3f419c25
MD5 hash:
75fa132d73b6551f40daeaf2d754660d
SHA1 hash:
b583d64c56f1991449421f7cd32f4b85db962b7a
Detections:
win_formbook_g0
Create hunting rule
win_formbook_auto
Create hunting rule
Link:
https://www.unpac.me/results/013029a1-c646-48df-b950-85e5bbec40f6/
SH256 hash:
445ac3612e878b21a7970456433ddc700d6f17831db597a348f8dde98317b32c
MD5 hash:
8f8d4e5659472d650539bce8016b275c
SHA1 hash:
35804f45ad859b06d8fde19adfe115098894e6c6
Link:
https://www.unpac.me/results/013029a1-c646-48df-b950-85e5bbec40f6/
SH256 hash:
099e769c199e048d8da0d7ba12deb4a65491d3d5ba629fa0f5f6d6cfac1d75ff
MD5 hash:
90df7ff9a911254aa9c7728bb27eb2c8
SHA1 hash:
dec3c1beaed557f57cc5a29a3a69426a55ad7f2c
Link:
https://www.unpac.me/results/013029a1-c646-48df-b950-85e5bbec40f6/
SH256 hash:
3179bf5f5d5c44ac7281ebc22a709ee36419e615a8c2a30e375dcc41e575c450
MD5 hash:
dd94326f4a9c49e714f066618015626e
SHA1 hash:
736a9466f17858e629e22c949112211a470c7266
Link:
https://www.unpac.me/results/013029a1-c646-48df-b950-85e5bbec40f6/
SH256 hash:
70b785e5cb5b2e61c0f5da4a71ab0bbd14d9a0849387f037e0d75cc1ffe0a082
MD5 hash:
5951b52c9b4d11ca7f4f33e5a3fb2c31
SHA1 hash:
0bc54fd699fff7b93e5c447a141c0d904924ab0d
Link:
https://www.unpac.me/results/013029a1-c646-48df-b950-85e5bbec40f6/
SH256 hash:
831f79faeff5bd6704c5aca840f3067b4762e5b6e6228b04221ccf351b146da7
MD5 hash:
ebe9f0088ca1b2466ff96453affd3792
SHA1 hash:
4e308193cbfbd8fcb9db9bc4f54344d5e211aab0
Link:
https://www.unpac.me/results/013029a1-c646-48df-b950-85e5bbec40f6/
Malware family:
XLoader
Create hunting rule
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/831f79faeff5/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/831f79faeff5bd6704c5aca840f3067b4762e5b6e6228b04221ccf351b146da7

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:malware_Formbook_strings
Create hunting rule
Author:JPCERT/CC Incident Response Group
Description:detect Formbook in memory
Reference:internal research
Rule name:pe_imphash
Create hunting rule
Rule name:Skystars_Malware_Imphash
Create hunting rule
Author:Skystars LightDefender
Description:imphash
Rule name:win_formbook_auto
Create hunting rule
Author:Felix Bilstein - yara-signator at cocacoding dot com
Description:Detects win.formbook.

File information

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

  
Delivery method
Other
Cape
Cape
https://www.capesandbox.com/analysis/243832/
  
URLhaus
https://urlhaus.abuse.ch/url/2055540/

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