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MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 65f7b9d663b9adc3ad6d0dc4d72f4dafd9c04b837a3e255f9a435dcc3512598f. 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: 9


Intelligence 9 IOCs YARA 26 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 65f7b9d663b9adc3ad6d0dc4d72f4dafd9c04b837a3e255f9a435dcc3512598f
SHA3-384 hash: 0159d743da5c2ef5610864986ffe52927c940c544250b02293dfd9dcec2686fac0b94414d84865703bbcc815b2fcd768
SHA1 hash: f4fc1147414c1add7b6fbb6dcedf0b35fe6e1161
MD5 hash: bb4f623e76a412e2a10b1c83987df08a
humanhash: floor-beer-violet-river
File name:secured_stub.ps1
Download: download sample
Signature Formbook
Create hunting rule
File size:1'506'437 bytes
First seen:2026-10-29 12:10:43 UTC
Last seen:Never
File type:PowerShell (PS) ps1
MIME type:text/plain
ssdeep 24576:77EACERloZ9VjJ/wpipduxbRncTJZ1/GYw9GgHiOh/Cqzcxbsx:UKT0wlcMYw9H5Vgsx
TLSH T1E765237D5D8A52DF0811E2BEB145B858B2E82386094162A743FC457072F6630FEBFDE6
Magika powershell
Reporter James_inthe_box
Tags:exe FormBook ps1

Intelligence

File Origin
# of uploads :
1
# of downloads :
183
Origin country :
US US
Vendor Threat Intelligence
No detections
Verdict:
Clean
Score:
99.9%
Link:
https://cyber-fortress.com/docs/result/index.php?id=6ae337e8b121dd519dce9d5a
Tags:
n/a
Verdict:
Malicious
Threat level:
  10/10
Confidence:
100%
Tags:
aes aspnet_compiler base64 base64 crypto encrypted evasive lolbin obfuscated reconnaissance
Link:
https://www.filescan.io/uploads/6ae337e721f6a19390f6a14f/reports/299bdbae-a387-4419-8f86-8d5410c0f628/overview
Verdict:
Malicious
Labled as:
Trojan/PS.Loader
Link:
https://www.hybrid-analysis.com/sample/65f7b9d663b9adc3ad6d0dc4d72f4dafd9c04b837a3e255f9a435dcc3512598f
Result
Threat name:
FormBook
Create hunting rule
Detection:
malicious
Classification:
troj.spyw.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1994626
Signature
.NET source code contains method to dynamically call methods (often used by packers)
Antivirus detection for URL or domain
Found direct / indirect Syscall (likely to bypass EDR)
Injects a PE file into a foreign processes
Joe Sandbox ML detected suspicious sample
Maps a DLL or memory area into another process
Modifies the context of a thread in another process (thread injection)
Queues an APC in another process (thread injection)
Sigma detected: Uncommon Userinit Child Process
Suricata IDS alerts for network traffic
Switches to a custom stack to bypass stack traces
Tries to harvest and steal browser information (history, passwords, etc)
Tries to steal Mail credentials (via file / registry access)
Unusual module load detection (module proxying)
Writes to foreign memory regions
Yara detected FormBook
Yara detected Powershell decode and execute
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 1994626 Sample: secured_stub.ps1 Startdate: 29/10/2026 Architecture: WINDOWS Score: 100 31 www.tvervision.online 2->31 33 www.sibclimat38.ru 2->33 35 18 other IPs or domains 2->35 61 Suricata IDS alerts for network traffic 2->61 63 Antivirus detection for URL or domain 2->63 65 Yara detected FormBook 2->65 67 5 other signatures 2->67 8 powershell.exe 20 2->8         started        11 EVcs53EyxGE9B.exe 2->11 injected 13 TgmBQnwjmpCCHM.exe 2->13 injected 16 svchost.exe 1 1 2->16         started        signatures3 process4 dnsIp5 69 Writes to foreign memory regions 8->69 71 Injects a PE file into a foreign processes 8->71 18 aspnet_compiler.exe 8->18         started        21 conhost.exe 8->21         started        23 aspnet_compiler.exe 8->23         started        27 24 other processes 8->27 25 userinit.exe 13 11->25         started        37 104.219.250.36, 49743, 49744, 80 NAMECHEAP-NET-NamecheapIncUS United States 13->37 39 www.bopap.live 203.161.58.88, 49722, 49723, 49724 NAMECHEAP-NET-NamecheapIncUS United States 13->39 43 12 other IPs or domains 13->43 41 127.0.0.1 unknown unknown 16->41 signatures6 process7 signatures8 45 Maps a DLL or memory area into another process 18->45 47 Queues an APC in another process (thread injection) 18->47 49 Unusual module load detection (module proxying) 18->49 51 Found direct / indirect Syscall (likely to bypass EDR) 18->51 53 Tries to steal Mail credentials (via file / registry access) 25->53 55 Tries to harvest and steal browser information (history, passwords, etc) 25->55 57 Modifies the context of a thread in another process (thread injection) 25->57 59 Switches to a custom stack to bypass stack traces 25->59 29 firefox.exe 25->29         started        process9
Score:
60%
Verdict:
Susipicious
File Type:
SCRIPT
Link:
https://malprob.io/report/65f7b9d663b9adc3ad6d0dc4d72f4dafd9c04b837a3e255f9a435dcc3512598f
Verdict:
inconclusive
YARA:
1 match(es)
Tags:
PowerShell T1059.001
Link:
https://app.malva.re/file/bb4f623e76a412e2a10b1c83987df08a
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/65f7b9d663b9adc3ad6d0dc4d72f4dafd9c04b837a3e255f9a435dcc3512598f/
Gathering data
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=mx33tvtdxgw4hllnbxcnol2nv7m4as4dpi7ckx42ino4ynislghq._file
Verdict:
malicious
Label(s):
FantomCrypt
Create hunting rule
Formbook
Create hunting rule
Link:
https://reports.threatray.com/3a44a039-ad88-41cf-8233-1681cdb74d7f
Result
Malware family:
formbook
Create hunting rule
Score:
  10/10
Tags:
family:formbook adware collection defense_evasion discovery execution privilege_escalation rat spyware stealer trojan
Link:
https://tria.ge/reports/261029-pcp6vay16m/
Behaviour
Modifies Internet Explorer settings
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: MapViewOfSection
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
outlook_office_path
Command and Scripting Interpreter: PowerShell
System Location Discovery: System Language Discovery
Suspicious use of SetThreadContext
Accesses Microsoft Outlook profiles
Badlisted process makes network request
Family: Formbook
Formbook payload
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/65f7b9d663b9adc3ad6d0dc4d72f4dafd9c04b837a3e255f9a435dcc3512598f

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:CP_Script_Inject_Detector
Create hunting rule
Author:DiegoAnalytics
Description:Detects attempts to inject code into another process across PE, ELF, Mach-O binaries
Rule name:DebuggerCheck__GlobalFlags
Create hunting rule
Reference:https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara
Rule name:DebuggerCheck__QueryInfo
Create hunting rule
Reference:https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara
Rule name:DebuggerHiding__Active
Create hunting rule
Reference:https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara
Rule name:DebuggerHiding__Thread
Create hunting rule
Reference:https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara
Rule name:DetectEncryptedVariants
Create hunting rule
Author:Zinyth
Description:Detects 'encrypted' in ASCII, Unicode, base64, or hex-encoded
Rule name:detect_powershell
Create hunting rule
Author:daniyyell
Description:Detects suspicious PowerShell activity related to malware execution
Rule name:dgaagas
Create hunting rule
Author:Harshit
Description:Uses certutil.exe to download a file named test.txt
Rule name:exploit_any_poppopret
Create hunting rule
Author:Jeff White [karttoon@gmail.com] @noottrak
Description:Identify POP -> POP -> RET opcodes for quick ROP Gadget creation in target binaries.
Rule name:golang_bin_JCorn_CSC846
Create hunting rule
Author:Justin Cornwell
Description:CSC-846 Golang detection ruleset
Rule name:MD5_Constants
Create hunting rule
Author:phoul (@phoul)
Description:Look for MD5 constants
Rule name:pe_no_import_table
Create hunting rule
Description:Detect pe file that no import table
Rule name:RANSOMWARE
Create hunting rule
Author:ToroGuitar
Rule name:RIPEMD160_Constants
Create hunting rule
Author:phoul (@phoul)
Description:Look for RIPEMD-160 constants
Rule name:SEH__vectored
Create hunting rule
Reference:https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara
Rule name:SHA1_Constants
Create hunting rule
Author:phoul (@phoul)
Description:Look for SHA1 constants
Rule name:shellcode
Create hunting rule
Author:nex
Description:Matched shellcode byte patterns
Rule name:Sus_CMD_Powershell_Usage
Create hunting rule
Author:XiAnzheng
Description:May Contain(Obfuscated or no) Powershell or CMD Command that can be abused by threat actor(can create FP)
Rule name:telebot_framework
Create hunting rule
Author:vietdx.mb
Rule name:TH_Win_ETW_Bypass_2025_CYFARE
Create hunting rule
Author:CYFARE
Description:Windows ETW Bypass Detection Rule - 2025
Reference:https://cyfare.net/
Rule name:WIN_Malware_SalatStealer_ForgeAuto_542e717b
Create hunting rule
Author:Marjoriefort
Description:Detects SalatStealer (pe, etat binaire)
Rule name:WIN_Malware_Sliver_ForgeAuto_2ddb463c
Create hunting rule
Author:Marjoriefort
Description:Detects Sliver (pe, etat binaire)
Rule name:WIN_Malware_Unknown_ForgeAuto_2ffc3572
Create hunting rule
Author:Marjoriefort
Description:Detects Unknown (pe, etat binaire)
Rule name:WIN_Malware_Unknown_ForgeAuto_5001c94c
Create hunting rule
Author:Marjoriefort
Description:Detects Unknown (pe, etat binaire)
Rule name:WIN_Malware_Unknown_ForgeAuto_ce8c5b46
Create hunting rule
Author:Marjoriefort
Description:Detects Unknown (pe, etat binaire)
Rule name:WIN_Malware_ValleyRAT_ForgeAuto_401c5e16
Create hunting rule
Author:Marjoriefort
Description:Detects ValleyRAT (pe, etat binaire)

File information

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

Comments