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MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 c821494f28bc861beb559a44fe0cf8ff2f571e7fae03099c81559f4113115b68. 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: 11


Intelligence 11 IOCs YARA 2 File information Comments
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SHA256 hash: c821494f28bc861beb559a44fe0cf8ff2f571e7fae03099c81559f4113115b68
SHA3-384 hash: fbbee34056692fd4f458b21a3cdf583b597741231244f1e0ccad755b4944ee6c7aeb343570f4bbe4314e9b8aaf1d7582
SHA1 hash: d7315a99cc26adea17e777dd383c550c4d823cd9
MD5 hash: 7abc69506e26eb4af7806f7c1cbce419
humanhash: undress-muppet-carolina-eight
File name:PO958483485430394.js
Download: download sample
Signature Formbook
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File size:1'221'697 bytes
First seen:2026-10-07 09:33:01 UTC
Last seen:Never
File type:Java Script (JS) js
MIME type:application/javascript
ssdeep 1536:KaHBtC5ohVG4nMzGbn2vjvWx727enmoxJTrUYiOHYh6/yi+adscYV+IxTbOiGhKp:dV3Mzc2vaxi7v7lykDU2VQc
TLSH T12D454A5303851BBDF68D0EC9C95B245B20F2E9677D241258EBB36EE7BC3B9849430636
Magika javascript
Reporter lowmal3
Tags:FormBook js

Intelligence

File Origin
# of uploads :
1
# of downloads :
172
Origin country :
DE DE
Vendor Threat Intelligence
No detections
Detection(s):
SecuriteInfo.com.Other.Malware-gen.45334565.UNOFFICIAL
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Verdict:
Malicious
Score:
99.1%
Link:
https://cyber-fortress.com/docs/result/index.php?id=6ad030aa6f551121ba15a58f
Tags:
agenttesla virus shell sage
Verdict:
Malicious
Threat level:
  10/10
Confidence:
100%
Tags:
anti-vm base64 base64 corrupted encrypted evasive evasive fingerprint lolbin msbuild obfuscated reconnaissance repaired
Link:
https://www.filescan.io/uploads/6ac611e2aaf71f9bc0084a8a/reports/dd2d28f7-ccbc-4947-befd-2eb61139d767/overview
Verdict:
Malicious
Labled as:
SVM:TrojanDownloader/JS.MalBehav.gen
Link:
https://www.hybrid-analysis.com/sample/c821494f28bc861beb559a44fe0cf8ff2f571e7fae03099c81559f4113115b68
Verdict:
Malicious
File Type:
text
First seen:
2026-10-07T05:31:00Z UTC
Last seen:
2026-10-09T07:20:00Z UTC
Hits:
~1000
Link:
https://opentip.kaspersky.com/c821494f28bc861beb559a44fe0cf8ff2f571e7fae03099c81559f4113115b68/results?tab=lookup
Result
Threat name:
FormBook
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Detection:
malicious
Classification:
troj.spyw.expl.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1983449
Signature
Creates processes via WMI
Found direct / indirect Syscall (likely to bypass EDR)
Injects a PE file into a foreign processes
JavaScript source code contains functionality to generate code involving a shell, file or stream
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
Queues an APC in another process (thread injection)
Sigma detected: Suspicious PowerShell Parameter Substring
Sigma detected: Suspicious Script Execution From Temp Folder
Sigma detected: WScript or CScript Dropper
Suricata IDS alerts for network traffic
Suspicious execution chain found
Suspicious powershell command line found
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)
Windows Scripting host queries suspicious COM object (likely to drop second stage)
Wscript starts Powershell (via cmd or directly)
Yara detected AntiVM3
Yara detected FormBook
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 1983449 Sample: PO958483485430394.js Startdate: 07/10/2026 Architecture: WINDOWS Score: 100 35 www.evolife.cn 2->35 37 www.yingcan.wiki 2->37 39 bili12xin12jiqun.cdn.dun555.com 2->39 55 Suricata IDS alerts for network traffic 2->55 57 Multi AV Scanner detection for submitted file 2->57 59 Yara detected FormBook 2->59 61 6 other signatures 2->61 9 wscript.exe 1 1 2->9         started        13 7DJgdyNm9.exe 2->13 injected 15 CUKN6EghAibK.exe 2->15 injected signatures3 process4 dnsIp5 33 C:\Users\user\AppData\Local\Temp\42610.ps1, Unicode 9->33 dropped 69 Wscript starts Powershell (via cmd or directly) 9->69 71 Windows Scripting host queries suspicious COM object (likely to drop second stage) 9->71 73 Suspicious execution chain found 9->73 75 Creates processes via WMI 9->75 18 cmd.exe 1 9->18         started        77 Maps a DLL or memory area into another process 13->77 79 Found direct / indirect Syscall (likely to bypass EDR) 13->79 21 sc.exe 13 13->21         started        41 www.evolife.cn 121.43.176.43, 49724, 80 ALIBABA-CN-NETHangzhouAlibabaAdvertisingCoLtdCN China 15->41 file6 signatures7 process8 signatures9 43 Suspicious powershell command line found 18->43 45 Wscript starts Powershell (via cmd or directly) 18->45 23 powershell.exe 15 18->23         started        26 conhost.exe 18->26         started        47 Tries to steal Mail credentials (via file / registry access) 21->47 49 Tries to harvest and steal browser information (history, passwords, etc) 21->49 51 Modifies the context of a thread in another process (thread injection) 21->51 53 3 other signatures 21->53 28 firefox.exe 21->28         started        process10 signatures11 63 Injects a PE file into a foreign processes 23->63 65 Unusual module load detection (module proxying) 23->65 67 Switches to a custom stack to bypass stack traces 23->67 30 powershell.exe 23->30         started        process12 signatures13 81 Modifies the context of a thread in another process (thread injection) 30->81 83 Maps a DLL or memory area into another process 30->83 85 Queues an APC in another process (thread injection) 30->85
Score:
31%
Verdict:
Susipicious
File Type:
SCRIPT
Link:
https://malprob.io/report/c821494f28bc861beb559a44fe0cf8ff2f571e7fae03099c81559f4113115b68
Gathering data
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/c821494f28bc861beb559a44fe0cf8ff2f571e7fae03099c81559f4113115b68/
Threat name:
Win32.Trojan.Generic
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Status:
Suspicious
First seen:
2026-10-07 09:33:26 UTC
File Type:
Text (JavaScript)
AV detection:
10 of 38 (26.32%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=zaqustzixsdbx22vtjcp4dhy74xvoht7vybqthebkwpuceyrlnua._file
Result
Malware family:
formbook
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Score:
  10/10
Tags:
family:formbook discovery execution rat spyware stealer trojan
Link:
https://tria.ge/reports/261007-ljb11sez3w/
Behaviour
Suspicious behavior: EnumeratesProcesses
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
Command and Scripting Interpreter: JavaScript
Executes a command shell one-liner
Reads the TCP/IP host and domain name from the registry
System Location Discovery: System Language Discovery
Suspicious use of SetThreadContext
Enumerates connected drives
Command and Scripting Interpreter: PowerShell
Family: Formbook
Formbook payload
Process spawned unexpected child process
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/c821494f28bc861beb559a44fe0cf8ff2f571e7fae03099c81559f4113115b68

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:SCRIPT_Dropper_Unknown_ForgeAuto_0507f067_Script
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Author:Marjoriefort
Description:Detects Unknown (script_js, etat script)
Rule name:Sus_CMD_Powershell_Usage
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Author:XiAnzheng
Description:May Contain(Obfuscated or no) Powershell or CMD Command that can be abused by threat actor(can create FP)

File information

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

Comments