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MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 e39c8457e4eaaa1c0ca650dd2bb434d07118a34397180292ba6d05584f65d7c7. 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: 12


Intelligence 12 IOCs YARA 2 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: e39c8457e4eaaa1c0ca650dd2bb434d07118a34397180292ba6d05584f65d7c7
SHA3-384 hash: 3b06d9a81c0ef23695d5810ad2decbca619b4d67117bbc599f416186aaf72f210e21849e165250399c9853ee579f151f
SHA1 hash: a909e0e56fea3dcbbfa2a445792d7ed31e075a88
MD5 hash: 3c916f4f74ce5248cc7e23ee8fbf6078
humanhash: berlin-helium-music-pizza
File name:P.O_SILKOMO LLC.js
Download: download sample
Signature Formbook
Create hunting rule
File size:56'790 bytes
First seen:2026-10-29 11:44:57 UTC
Last seen:Never
File type:Java Script (JS) js
MIME type:text/plain
ssdeep 768:6vDwXO89EQm+pjH8Zmt/5ENwi1KoPUcl5CBNVh3ZtT46A1gAXNiM8ba:LlrVcZmLHOU1VHV4n
TLSH T1AC430E968B83026897C054C0D51AE93AECF6894F342968C9B7456BDFF72CD52F0B7722
Magika javascript
Reporter abuse_ch
Tags:FormBook js

Intelligence

File Origin
# of uploads :
1
# of downloads :
179
Origin country :
SE SE
Vendor Threat Intelligence
No detections
Detection(s):
SecuriteInfo.com.JS.Trojan.Cryxos.17103.17858174.UNOFFICIAL
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Verdict:
Malicious
Score:
81.4%
Link:
https://cyber-fortress.com/docs/result/index.php?id=6ae331ddb175ade21dce80b9
Tags:
shell sage hype
Verdict:
Likely Malicious
Threat level:
  7.5/10
Confidence:
100%
Tags:
anti-vm encrypted fingerprint obfuscated repaired
Link:
https://www.filescan.io/uploads/6ae331dec761412237948f5b/reports/8147204e-aa4d-4987-91d9-f27ccadb891e/overview
Verdict:
Malicious
Labled as:
Trojan.Cryxos.JS
Link:
https://www.hybrid-analysis.com/sample/e39c8457e4eaaa1c0ca650dd2bb434d07118a34397180292ba6d05584f65d7c7
Verdict:
Malicious
File Type:
js
First seen:
2026-10-29T08:34:00Z UTC
Last seen:
2026-10-31T09:12:00Z UTC
Hits:
~1000
Link:
https://opentip.kaspersky.com/e39c8457e4eaaa1c0ca650dd2bb434d07118a34397180292ba6d05584f65d7c7/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/1994597
Signature
.NET source code contains potential unpacker
Antivirus detection for dropped file
Antivirus detection for URL or domain
Creates processes via WMI
Detected large data written to user environment variables, potentially indicating payload staging for fileless execution
Found direct / indirect Syscall (likely to bypass EDR)
Injects a PE file into a foreign processes
Joe Sandbox ML detected suspicious sample
JScript performs obfuscated calls to suspicious functions
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 submitted file
Powershell connects to network
Queues an APC in another process (thread injection)
Sigma detected: Dot net compiler compiles file from suspicious location
Sigma detected: WScript or CScript Dropper
Suricata IDS alerts for network traffic
Suspicious execution chain 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)
Writes to foreign memory regions
Wscript starts Powershell (via cmd or directly)
Yara detected FormBook
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 1994597 Sample: P.O_SILKOMO LLC.js Startdate: 29/10/2026 Architecture: WINDOWS Score: 100 46 www.yingcan.wiki 2->46 48 www.whphli.com 2->48 50 8 other IPs or domains 2->50 82 Suricata IDS alerts for network traffic 2->82 84 Malicious sample detected (through community Yara rule) 2->84 86 Antivirus detection for URL or domain 2->86 88 8 other signatures 2->88 10 wscript.exe 2 2->10         started        13 vsoJDcNTqNU1.exe 2->13 injected 15 kvfTW7C9O.exe 2->15 injected signatures3 process4 dnsIp5 90 JScript performs obfuscated calls to suspicious functions 10->90 92 Wscript starts Powershell (via cmd or directly) 10->92 94 Windows Scripting host queries suspicious COM object (likely to drop second stage) 10->94 100 3 other signatures 10->100 18 cmd.exe 1 10->18         started        21 conhost.exe 10->21         started        96 Maps a DLL or memory area into another process 13->96 98 Found direct / indirect Syscall (likely to bypass EDR) 13->98 23 msinfo32.exe 13 13->23         started        58 www.fuerilo.top 203.161.44.7, 49762, 49763, 49764 NAMECHEAP-NET-NamecheapIncUS United States 15->58 60 www.grandseosite91.shop 173.214.175.131, 49774, 49775, 49776 INTERSERVER-LAX-InterserverIncUS United States 15->60 62 7 other IPs or domains 15->62 signatures6 process7 signatures8 64 Wscript starts Powershell (via cmd or directly) 18->64 25 powershell.exe 14 24 18->25         started        30 conhost.exe 18->30         started        66 Tries to steal Mail credentials (via file / registry access) 23->66 68 Tries to harvest and steal browser information (history, passwords, etc) 23->68 70 Modifies the context of a thread in another process (thread injection) 23->70 72 3 other signatures 23->72 32 firefox.exe 23->32         started        process9 dnsIp10 52 64.224.17.115, 49744, 80 VIRTUO-12651980CANADAINCCA United States 25->52 54 129.121.148.240, 49738, 80 UNIFIEDLAYER-AS-1-UnifiedLayerUS Germany 25->54 56 2 other IPs or domains 25->56 44 C:\Users\user\AppData\...\arqblqf3.cmdline, Unicode 25->44 dropped 102 Writes to foreign memory regions 25->102 104 Injects a PE file into a foreign processes 25->104 106 Powershell connects to network 25->106 34 AppLaunch.exe 25->34         started        37 csc.exe 3 25->37         started        file11 signatures12 process13 file14 74 Modifies the context of a thread in another process (thread injection) 34->74 76 Maps a DLL or memory area into another process 34->76 78 Queues an APC in another process (thread injection) 34->78 80 2 other signatures 34->80 42 C:\Users\user\AppData\Local\...\arqblqf3.dll, PE32 37->42 dropped 40 cvtres.exe 1 37->40         started        signatures15 process16
Score:
63%
Verdict:
Susipicious
File Type:
SCRIPT
Link:
https://malprob.io/report/e39c8457e4eaaa1c0ca650dd2bb434d07118a34397180292ba6d05584f65d7c7
Verdict:
Malware
YARA:
1 match(es)
Tags:
Javascript JS Emulation Trace T1059.007 WScript.Shell
Link:
https://app.malva.re/file/3c916f4f74ce5248cc7e23ee8fbf6078
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/e39c8457e4eaaa1c0ca650dd2bb434d07118a34397180292ba6d05584f65d7c7/
Threat name:
Win32.Trojan.Vigorf
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Status:
Malicious
First seen:
2026-10-29 11:45:30 UTC
File Type:
Text (JavaScript)
AV detection:
9 of 23 (39.13%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=4ooiiv7e5kvbydfgkdosxnbu2byrri2ds4mafev2nucvqt3f27dq._file
Verdict:
malicious
Label(s):
Formbook
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Link:
https://reports.threatray.com/01a6c12f-1de8-4302-b22b-cb9f6de6440e
Result
Malware family:
n/a
Score:
  10/10
Tags:
discovery execution
Link:
https://tria.ge/reports/261029-nwxvcsyzd1/
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
Suspicious use of SetThreadContext
Badlisted process makes network request
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/e39c8457e4eaaa1c0ca650dd2bb434d07118a34397180292ba6d05584f65d7c7

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:OBFUS_PowerShell_Common_Replace
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Author:SECUINFRA Falcon Team
Description:Detects the common usage of replace for obfuscation
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