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MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 13fffbb670b7700238cb3fd63a701a976b0cc4ae7f8b9cbf825d27f69f232f14. 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 26 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 13fffbb670b7700238cb3fd63a701a976b0cc4ae7f8b9cbf825d27f69f232f14
SHA3-384 hash: f7d224be159f32e11e1cd8decb0c415ca9016f3a441d7647bfff77ed6874fc9ff0302a27aa99b8b848c5c14d79e0ab7e
SHA1 hash: bbbbc72efca6a6fc336a2b609bc4c7cabb14505e
MD5 hash: 0f726db22ed75ab5715466faa80ee3a3
humanhash: berlin-texas-ten-michigan
File name:secured_sstub.ps1
Download: download sample
Signature Formbook
Create hunting rule
File size:1'549'528 bytes
First seen:2026-10-27 06:32:13 UTC
Last seen:Never
File type:PowerShell (PS) ps1
MIME type:text/plain
ssdeep 24576:ojADTS3yLro2/0sXc8ZbaGrKRZ6Q8hHXbAu4dUwilBucZmfv4wYypTeDAqsr317:ooPjHR5sWWcZmXOGe527
TLSH T1FD75236CE61D27DF0900B2FA7A31B4CDB8D956871D814352B3ACC05432B3DB95E6ACD6
Magika powershell
Reporter abuse_ch
Tags:FormBook ps1

Intelligence

File Origin
# of uploads :
1
# of downloads :
75
Origin country :
SE SE
Vendor Threat Intelligence
No detections
Verdict:
Malicious
Score:
90.2%
Link:
https://cyber-fortress.com/docs/result/index.php?id=6ae0457449621540087bdd25
Tags:
extens spawn lien hype
Verdict:
Likely Malicious
Threat level:
  7.5/10
Confidence:
100%
Tags:
aes aspnet_compiler base64 base64 crypto encrypted evasive lolbin obfuscated reconnaissance
Link:
https://www.filescan.io/uploads/6ae0456f6267b7d62c1f5bbc/reports/14dffd4a-b57e-484b-b547-a122566b0052/overview
Verdict:
Suspicious
Labled as:
ABRisk.UTQF
Link:
https://www.hybrid-analysis.com/sample/13fffbb670b7700238cb3fd63a701a976b0cc4ae7f8b9cbf825d27f69f232f14
Result
Threat name:
FormBook
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Detection:
malicious
Classification:
troj.spyw.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1992357
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)
Performs DNS queries to domains with low reputation
Queues an APC in another process (thread injection)
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: 1992357 Sample: secured_sstub.ps1 Startdate: 27/10/2026 Architecture: WINDOWS Score: 100 31 www.45029605.xyz 2->31 33 www.topvizitka.cz 2->33 35 19 other IPs or domains 2->35 59 Antivirus detection for URL or domain 2->59 61 Yara detected FormBook 2->61 63 Yara detected Powershell decode and execute 2->63 67 3 other signatures 2->67 8 powershell.exe 20 2->8         started        11 U8lOAC39a5.exe 2->11 injected 13 jjkwdl6x0X.exe 2->13 injected signatures3 65 Performs DNS queries to domains with low reputation 31->65 process4 dnsIp5 69 Writes to foreign memory regions 8->69 71 Injects a PE file into a foreign processes 8->71 16 aspnet_compiler.exe 8->16         started        19 MpCmdRun.exe 1 8->19         started        21 conhost.exe 8->21         started        25 32 other processes 8->25 23 convert.exe 13 11->23         started        37 www.45029605.xyz 107.167.29.215, 49743, 49744, 49745 SHARKTECH-SharktechUS United States 13->37 39 www.miralink.online 178.210.92.188, 49726, 49727, 49728 RU-CENTERRU Russia 13->39 41 15 other IPs or domains 13->41 signatures6 process7 signatures8 43 Maps a DLL or memory area into another process 16->43 45 Queues an APC in another process (thread injection) 16->45 47 Unusual module load detection (module proxying) 16->47 49 Found direct / indirect Syscall (likely to bypass EDR) 16->49 27 conhost.exe 19->27         started        51 Tries to steal Mail credentials (via file / registry access) 23->51 53 Tries to harvest and steal browser information (history, passwords, etc) 23->53 55 Modifies the context of a thread in another process (thread injection) 23->55 57 Switches to a custom stack to bypass stack traces 23->57 29 firefox.exe 23->29         started        process9
Score:
36%
Verdict:
Susipicious
File Type:
SCRIPT
Link:
https://malprob.io/report/13fffbb670b7700238cb3fd63a701a976b0cc4ae7f8b9cbf825d27f69f232f14
Gathering data
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/13fffbb670b7700238cb3fd63a701a976b0cc4ae7f8b9cbf825d27f69f232f14/
Threat name:
Script.Malware.Heuristic
Create hunting rule
Status:
Malicious
First seen:
2026-10-27 03:26:35 UTC
File Type:
Text (PowerShell)
AV detection:
2 of 36 (5.56%)
Threat level:
  2/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=cp77xntqw5yaeoglh7ldu4a2s5vqzrfop6fzzp4clut7nhzdf4ka._file
Verdict:
malicious
Label(s):
Formbook
Create hunting rule
Link:
https://reports.threatray.com/ade92539-4ce9-4358-82c6-62982c2d5187
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/261027-haqw2aaz91/
Behaviour
Enumerates system info in registry
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.

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:AgentTesla_PowerShell_AESManaged_InMemory_Loader
Create hunting rule
Author:Aldair Maihuiri
Description:Detects a PowerShell AES-CBC in-memory loader through its managed cryptography and execution chain
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: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
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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
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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.

Web download

Formbook

PowerShell (PS) ps1 13fffbb670b7700238cb3fd63a701a976b0cc4ae7f8b9cbf825d27f69f232f14

(this sample)

  
URLhaus
https://urlhaus.abuse.ch/url/4035567/
  
Delivery method
Distributed via web download

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