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MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 40c8318094909626d9f9b722f0ef170bca9cd8f7272e51ee7df7b4beceab8d1b. 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 17 File information Comments
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SHA256 hash: 40c8318094909626d9f9b722f0ef170bca9cd8f7272e51ee7df7b4beceab8d1b
SHA3-384 hash: 660c4391140cc36974b753d1d26de52a0346c11d9d658cfe97858789c97d42f5952494259afeb4480b03bdb21859d54a
SHA1 hash: 18176c8ebd6207824a17d6c79e1c711a392673e0
MD5 hash: 6b791abf0daf0f6b48f692b0ea68d192
humanhash: mississippi-queen-south-kitten
File name:SW_628811.JS
Download: download sample
Signature Formbook
Create hunting rule
File size:3'468'796 bytes
First seen:2026-10-01 14:51:13 UTC
Last seen:Never
File type:Java Script (JS) js
MIME type:text/plain
ssdeep 98304:zCTF3CUUeJ3pKjsL4czlW1QWGWXI+53dYLxSx0/gqUIMgdNqWTNlkvaQq+qBKzj:zCTF3CfeJ3Tjw1QqIcttFkkvAK
TLSH T1D3F5B2BC1794A432A22D671CC276A93166CA308374C9DB3D31F9B214736095B737FAE6
Magika javascript
Reporter abuse_ch
Tags:FormBook js

Intelligence

File Origin
# of uploads :
1
# of downloads :
151
Origin country :
SE SE
Vendor Threat Intelligence
No detections
Verdict:
Malicious
Score:
93.3%
Link:
https://cyber-fortress.com/docs/result/index.php?id=6aceb6e82e5d8a93d81530a9
Tags:
autorun virus sage blic
Verdict:
Malicious
Threat level:
  10/10
Confidence:
100%
Tags:
anti-debug dropper evasive obfuscated obfuscated packed repaired
Link:
https://www.filescan.io/uploads/6abe73805e306c669d4d32e4/reports/77a7eb7c-2bc5-42dc-af49-e32e85271368/overview
Verdict:
Malicious
Labled as:
JS/TrojanDropper.ModiLoader
Link:
https://www.hybrid-analysis.com/sample/40c8318094909626d9f9b722f0ef170bca9cd8f7272e51ee7df7b4beceab8d1b
Verdict:
Malicious
File Type:
js
First seen:
2026-10-01T04:49:00Z UTC
Last seen:
2026-10-03T07:36:00Z UTC
Hits:
~100
Link:
https://opentip.kaspersky.com/40c8318094909626d9f9b722f0ef170bca9cd8f7272e51ee7df7b4beceab8d1b/results?tab=lookup
Result
Threat name:
FormBook
Create hunting rule
Detection:
malicious
Classification:
troj.spyw.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1980775
Signature
Found API chain indicative of debugger detection
Found direct / indirect Syscall (likely to bypass EDR)
JavaScript source code contains call to eval() to check own source code (likely for evading instrumentation)
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: Invoke-Obfuscation CLIP+ Launcher
Sigma detected: Invoke-Obfuscation VAR+ Launcher
Sigma detected: Suspicious Command Patterns In Scheduled Task Creation
Sigma detected: WScript or CScript Dropper
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)
Uses schtasks.exe or at.exe to add and modify task schedules
Uses whoami command line tool to query computer and username
Windows Scripting host queries suspicious COM object (likely to drop second stage)
WScript reads language and country specific registry keys (likely country aware script)
Yara detected FormBook
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 1980775 Sample: SW_628811.JS.js Startdate: 01/10/2026 Architecture: WINDOWS Score: 100 71 www.realgroup.pw 2->71 73 www.9pttu.asia 2->73 75 7 other IPs or domains 2->75 87 Suricata IDS alerts for network traffic 2->87 89 Multi AV Scanner detection for submitted file 2->89 91 Yara detected FormBook 2->91 93 7 other signatures 2->93 10 wscript.exe 1 4 2->10         started        14 K01w7Vaoa.exe 2->14 injected 16 cmd.exe 1 4 2->16         started        18 6T1CWEBI4Lq.exe 2->18 injected signatures3 process4 dnsIp5 69 C:\Users\user\Documents\FPXYVRIBWWPEMWID, ASCII 10->69 dropped 111 Windows Scripting host queries suspicious COM object (likely to drop second stage) 10->111 113 WScript reads language and country specific registry keys (likely country aware script) 10->113 21 DIWMEPWWBIRVYXPF.exe 3 10->21         started        115 Maps a DLL or memory area into another process 14->115 117 Found direct / indirect Syscall (likely to bypass EDR) 14->117 25 dfrgui.exe 13 14->25         started        27 srdelayed.exe 14->27         started        29 cmd.exe 1 16->29         started        31 conhost.exe 16->31         started        77 ibratin.online 162.241.2.203, 49720, 49722, 49723 ORACLE-BMC-31898-OracleCorporationUS Brazil 18->77 79 www.9pttu.asia 186.244.225.40, 49736, 49738, 49739 CLOUDVALLEY-AS-APCloudvalleySdnBhdMY United States 18->79 81 3 other IPs or domains 18->81 file6 signatures7 process8 file9 67 C:\Users\user\...\FPXYVRIBWWPEMWID.url, MS 21->67 dropped 95 Found API chain indicative of debugger detection 21->95 97 Modifies the context of a thread in another process (thread injection) 21->97 99 Maps a DLL or memory area into another process 21->99 107 3 other signatures 21->107 33 cmd.exe 1 21->33         started        36 cmd.exe 1 21->36         started        38 cmd.exe 1 21->38         started        40 conhost.exe 21->40         started        101 Tries to steal Mail credentials (via file / registry access) 25->101 103 Tries to harvest and steal browser information (history, passwords, etc) 25->103 105 Unusual module load detection (module proxying) 25->105 42 firefox.exe 25->42         started        44 chrome.exe 25->44         started        46 DIWMEPWWBIRVYXPF.exe 1 29->46         started        48 conhost.exe 29->48         started        signatures10 process11 signatures12 83 Uses schtasks.exe or at.exe to add and modify task schedules 33->83 85 Uses whoami command line tool to query computer and username 33->85 50 whoami.exe 1 33->50         started        52 schtasks.exe 1 36->52         started        54 schtasks.exe 1 38->54         started        56 cmd.exe 1 46->56         started        59 cmd.exe 1 46->59         started        61 conhost.exe 46->61         started        process13 signatures14 109 Uses whoami command line tool to query computer and username 56->109 63 whoami.exe 1 56->63         started        65 schtasks.exe 1 59->65         started        process15
Gathering data
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/40c8318094909626d9f9b722f0ef170bca9cd8f7272e51ee7df7b4beceab8d1b/
Threat name:
Script-JS.Downloader.ModiLdr
Create hunting rule
Status:
Malicious
First seen:
2026-10-01 12:48:20 UTC
File Type:
Binary
AV detection:
10 of 38 (26.32%)
Threat level:
  3/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=ideddaeusclcnwpzw4rpb3yxbpfjzwhxe4xfd3t5662l5tvlrunq._file
Verdict:
malicious
Label(s):
Formbook
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Link:
https://reports.threatray.com/64eb4a93-9af8-4736-95f8-8af4de0eac95
Result
Malware family:
formbook
Create hunting rule
Score:
  10/10
Tags:
family:formbook defense_evasion discovery execution persistence privilege_escalation rat spyware stealer trojan
Link:
https://tria.ge/reports/261001-r8kbkswwfs/
Behaviour
Modifies registry class
Scheduled Task/Job: Scheduled Task
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: MapViewOfSection
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
Command and Scripting Interpreter: JavaScript
Enumerates physical storage devices
Executes a command shell one-liner
System Location Discovery: System Language Discovery
Suspicious use of SetThreadContext
Checks computer location settings
Executes dropped EXE
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/40c8318094909626d9f9b722f0ef170bca9cd8f7272e51ee7df7b4beceab8d1b

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: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:MULTI_Malware_AgentTesla_ForgeAuto_ed343f78_Extrait
Create hunting rule
Author:Marjoriefort
Description:Detects AgentTesla (inconnu, etat extrait)
Rule name:pe_no_import_table
Create hunting rule
Description:Detect pe file that no import table
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:SUSP_VBS_Randomized_ActiveX_Downloader
Create hunting rule
Author:Marjoriefort
Description:Dropper VBS obfusque : ActiveXObject a identifiant randomise (20 MAJ), SaveToFile, .Run
Reference:Veille fraicheur 2026-09-14 / grappe VBS randomisee
Rule name:TH_Win_ETW_Bypass_2025_CYFARE
Create hunting rule
Author:CYFARE
Description:Windows ETW Bypass Detection Rule - 2025
Reference:https://cyfare.net/

File information

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

Comments