MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 5683bdb2fc2b2f0bfd524ea328ead3cb7d405f888c54a96fe05dff6ee4d91bd7. 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: 13


Intelligence 13 IOCs YARA 4 File information Comments
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SHA256 hash: 5683bdb2fc2b2f0bfd524ea328ead3cb7d405f888c54a96fe05dff6ee4d91bd7
SHA3-384 hash: 76a8bd37edd6b262a5ebb014202821eb3119be1f70ff31641e54c5ed5745089b10053a1441defd1221d1552d4ea7fdcc
SHA1 hash: bc8d6ab10897163ca494c29a752ea4d9b1bfe778
MD5 hash: 6d656f77b56cafe4c1684261b99f2aaf
humanhash: cold-neptune-white-texas
File name:vbc.exe
Download: download sample
Signature Formbook
Create hunting rule
File size:975'872 bytes
First seen:2022-01-20 15:00:08 UTC
Last seen:2022-01-20 16:58:43 UTC
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'663 x AgentTesla, 19'478 x Formbook, 12'208 x SnakeKeylogger)
ssdeep 24576:bHSDrYGPpZ0FZR/SyDhJbQl4BbOCa5am:byPNZ0nR6yfFUL5am
Threatray 12'857 similar samples on MalwareBazaar
TLSH T1A22512053778C224D92152364CA7C0FE54793C29BC93962B79E5BF4F7AB37B10E0162A
Reporter James_inthe_box
Tags:exe FormBook

Intelligence

File Origin
# of uploads :
2
# of downloads :
213
Origin country :
n/a
Vendor Threat Intelligence
Detection:
Formbook
Create hunting rule
Link:
https://www.capesandbox.com/analysis/221134/
Detection(s):
SecuriteInfo.com.Trojan.Siggen16.37064.10260.22942.UNOFFICIAL
Create hunting rule

Result
Verdict:
Malware
Maliciousness:

Behaviour
Searching for the window
Adding an access-denied ACE
Launching a process
Сreating synchronization primitives
Searching for synchronization primitives
Creating a file
DNS request
Launching cmd.exe command interpreter
Sending a custom TCP request
Sending an HTTP GET request
Forced shutdown of a system process
Unauthorized injection to a system process
Verdict:
Malicious
Threat level:
  10/10
Confidence:
100%
Tags:
expand.exe formbook packed
Link:
https://www.filescan.io/uploads/61e978fbd32385db630f6120/reports/4cd922c1-c84f-4b07-864a-6c6d1030c2c2/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.
Gathering data
Result
Threat name:
FormBook
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Detection:
malicious
Classification:
troj.expl.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/924460
Signature
.NET source code contains very large array initializations
.NET source code references suspicious native API functions
Allocates memory in foreign processes
Antivirus detection for URL or domain
C2 URLs / IPs found in malware configuration
Contains functionality to hide user accounts
Found malware configuration
Injects a PE file into a foreign processes
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 domain / URL
Multi AV Scanner detection for submitted file
Queues an APC in another process (thread injection)
Sample uses process hollowing technique
Tries to detect sandboxes and other dynamic analysis tools (process name or module or function)
Tries to detect virtualization through RDTSC time measurements
Writes to foreign memory regions
Yara detected AntiVM3
Yara detected FormBook
Yara detected UAC Bypass using CMSTP
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 556947 Sample: vbc.exe Startdate: 20/01/2022 Architecture: WINDOWS Score: 100 34 www.785686.com 2->34 36 www.daligtemno.quest 2->36 40 Multi AV Scanner detection for domain / URL 2->40 42 Found malware configuration 2->42 44 Malicious sample detected (through community Yara rule) 2->44 46 11 other signatures 2->46 11 vbc.exe 1 2->11         started        signatures3 process4 file5 32 C:\Users\user\AppData\Local\...\vbc.exe.log, ASCII 11->32 dropped 54 Writes to foreign memory regions 11->54 56 Allocates memory in foreign processes 11->56 58 Injects a PE file into a foreign processes 11->58 15 mstsc.exe 11->15         started        18 hh.exe 11->18         started        signatures6 process7 signatures8 60 Modifies the context of a thread in another process (thread injection) 15->60 62 Maps a DLL or memory area into another process 15->62 64 Sample uses process hollowing technique 15->64 66 2 other signatures 15->66 20 explorer.exe 15->20 injected process9 dnsIp10 38 192.168.2.1 unknown unknown 20->38 23 colorcpl.exe 20->23         started        process11 signatures12 48 Modifies the context of a thread in another process (thread injection) 23->48 50 Maps a DLL or memory area into another process 23->50 52 Tries to detect virtualization through RDTSC time measurements 23->52 26 cmd.exe 1 23->26         started        28 explorer.exe 2 160 23->28         started        process13 process14 30 conhost.exe 26->30         started       
Detection:
xloader
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Link:
https://mwdb.cert.pl/sample/5683bdb2fc2b2f0bfd524ea328ead3cb7d405f888c54a96fe05dff6ee4d91bd7/
Threat name:
ByteCode-MSIL.Trojan.XLoader
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Status:
Malicious
First seen:
2022-01-20 10:59:55 UTC
File Type:
PE (.Net Exe)
Extracted files:
5
AV detection:
19 of 28 (67.86%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=k2b33mx4fmxqx7ksj2rsr2wtzn6uax4irrkks37alx7w5zgzdplq._file
Verdict:
malicious
Label(s):
formbook
Create hunting rule
Similar samples:
10ff5c8bac827b012bc5b6f789e7c23913b662453cd0bcc7f3f5192260d7a950
Formbook
204831bda7d04f0905f7bf0c39e45b3772935726d8a436ee9703a19098b37e21
Formbook
64c7583a94ab474b9cd3509e8ca73eb7a19e70ffc2c4fa4582ccd7fd3f10c5ec
Formbook
73f458d7e38ab748b7b7d3b3e680db9eb08d845c1b1b7c935a6ee453d8f03358
Formbook
75e51d5e7662ad2c7ee23822ebf5246ce2d3257734ef87883f57bbcffe13c5d2
Formbook
786698eab83f77c1fdc3d37daf49966befe788b0e85167083726354225176d1f
Formbook
9050768f69225078f05d535401510a5b361dd071430e40639e869c7247621908
Formbook
a7aeae9d2c1e1914881ef9c39ae9801c9bc757c58f1bfaeed11957cdc7920a7e
Formbook
d277fc7f7001598fc7730b3bfec96ce2749f616d64fe20bcd403a599b1bc7c2c
Formbook
+ 12'847 additional samples on MalwareBazaar
Result
Malware family:
xloader
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Score:
  10/10
Tags:
family:xloader campaign:cxbz loader persistence rat suricata
Link:
https://tria.ge/reports/220120-sdd2raaddr/
Behaviour
Modifies data under HKEY_USERS
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
Uses the VBS compiler for execution
Sets service image path in registry
Xloader Payload
Xloader
suricata: ET MALWARE FormBook CnC Checkin (GET)
Unpacked files
SH256 hash:
e32440682697cc332e91e3eb990c5eaef2c66f6bcbdb710db15a79809290a246
MD5 hash:
f73a0e6f7d6c50df9ab8de16d61a9b92
SHA1 hash:
4e0b874a36f06b911c925a346c21603af7c17939
Detections:
win_formbook_g0
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win_formbook_auto
Create hunting rule
Link:
https://www.unpac.me/results/3c8aa9af-8143-4e72-b0b5-9c6801120436/
SH256 hash:
a3079291e0045981e5c363964e4e306058c3133e67f62d96bd2999f3b1352906
MD5 hash:
06302083a36f235da1f4221390419e5e
SHA1 hash:
de72d627a9b970ab02b06cf0a7bb637ac38655b5
Link:
https://www.unpac.me/results/3c8aa9af-8143-4e72-b0b5-9c6801120436/
SH256 hash:
d56fc37b5070153a588f39b7d4081275924618215c47451b6c2ba996a942f775
MD5 hash:
e265916d38d9a99282cca783a9baefeb
SHA1 hash:
d53a7d5a14f2a7b29543657b22f90ba9d608d07b
Link:
https://www.unpac.me/results/3c8aa9af-8143-4e72-b0b5-9c6801120436/
SH256 hash:
70b785e5cb5b2e61c0f5da4a71ab0bbd14d9a0849387f037e0d75cc1ffe0a082
MD5 hash:
5951b52c9b4d11ca7f4f33e5a3fb2c31
SHA1 hash:
0bc54fd699fff7b93e5c447a141c0d904924ab0d
Link:
https://www.unpac.me/results/3c8aa9af-8143-4e72-b0b5-9c6801120436/
SH256 hash:
5683bdb2fc2b2f0bfd524ea328ead3cb7d405f888c54a96fe05dff6ee4d91bd7
MD5 hash:
6d656f77b56cafe4c1684261b99f2aaf
SHA1 hash:
bc8d6ab10897163ca494c29a752ea4d9b1bfe778
Link:
https://www.unpac.me/results/3c8aa9af-8143-4e72-b0b5-9c6801120436/
Malware family:
XLoader
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Verdict:
Malicious
Link:
https://www.vmray.com/analyses/5683bdb2fc2b/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/5683bdb2fc2b2f0bfd524ea328ead3cb7d405f888c54a96fe05dff6ee4d91bd7

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: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/221134/
  
URLhaus
https://urlhaus.abuse.ch/url/1993638/

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