MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 dc8a316ddc4d56791f78f417e0fa86f36a545f58a64ba165ae6ff41c91068983. 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: 13


Intelligence 13 IOCs YARA 1 File information Comments
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SHA256 hash: dc8a316ddc4d56791f78f417e0fa86f36a545f58a64ba165ae6ff41c91068983
SHA3-384 hash: a28a06711daa11b05117c974bf4f78d81315b7846a2ae820be2ae3283180c78822cdafb69c3f9e2e7abcb2bcc2ddb0e7
SHA1 hash: da17882f9c26c2acd2bea43a5fefc9ae48f618ba
MD5 hash: 64f6121c95125b9d3f81fea9ac5a99f9
humanhash: purple-venus-bacon-purple
File name:Proforma1.js
Download: download sample
Signature Formbook
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File size:7'935 bytes
First seen:2026-02-24 13:49:08 UTC
Last seen:Never
File type:Java Script (JS) js
MIME type:text/plain
ssdeep 96:vx+Al2+TbKT+KpT/yZjJdKT+mKwal2+ywK+wKbwWz5TbKo+2iPqOl2+vV6KgEiKJ:vluBjqVLK8iP1dvr5BEhokiRRfD
TLSH T16CF1E5C962B46734D64325A62880F7556FF70C471D621C86BB0FFAC7D4623180AEABE7
Magika javascript
Reporter JAMESWT_WT
Tags:FormBook js

Intelligence

File Origin
# of uploads :
1
# of downloads :
183
Origin country :
IT IT
Vendor Threat Intelligence
No detections
Detection(s):
SecuriteInfo.com.Other.Malware-gen.71393842.UNOFFICIAL
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Verdict:
Malicious
Score:
94.9%
Link:
https://cyber-fortress.com/docs/result/index.php?id=699da7f3c950ab5d9ab12e3c
Tags:
vmdetect stration malcrypt spawn
Verdict:
Malicious
Threat level:
  10/10
Confidence:
100%
Tags:
anti-vm dropper obfuscated packed repaired
Link:
https://www.filescan.io/uploads/699dac5e97feb4afd656dcab/reports/84069baa-23cc-4f11-a1fb-099ba2bff34f/overview
Verdict:
Malicious
Labled as:
Trojan.Cryxos.JS
Link:
https://www.hybrid-analysis.com/sample/dc8a316ddc4d56791f78f417e0fa86f36a545f58a64ba165ae6ff41c91068983
Verdict:
Malicious
File Type:
js
Detections:
Trojan-Downloader.Agent.HTTP.C&C Trojan-Downloader.JS.SLoad.sb HEUR:Trojan.Script.Generic
Link:
https://opentip.kaspersky.com/dc8a316ddc4d56791f78f417e0fa86f36a545f58a64ba165ae6ff41c91068983/results?tab=lookup
Score:
99%
Verdict:
Malware
File Type:
SCRIPT
Link:
https://malprob.io/report/dc8a316ddc4d56791f78f417e0fa86f36a545f58a64ba165ae6ff41c91068983
Gathering data
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/dc8a316ddc4d56791f78f417e0fa86f36a545f58a64ba165ae6ff41c91068983/
Verdict:
Malicious
Threat:
Trojan-Downloader.JS.SLoad
Link:
https://tip.neiki.dev/file/dc8a316ddc4d56791f78f417e0fa86f36a545f58a64ba165ae6ff41c91068983
Threat name:
Script-JS.Trojan.Cryxos
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Status:
Malicious
First seen:
2026-02-24 13:48:01 UTC
File Type:
Text (JavaScript)
AV detection:
12 of 38 (31.58%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=3sfdc3o4jvlhsh3y6ql6b6ug6nvfix2yuzf2cznon72bzeigrgbq._file
Verdict:
malicious
Label(s):
formbook
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Similar samples:
error
Formbook
Result
Malware family:
strrat
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Score:
  10/10
Tags:
family:strrat discovery execution persistence stealer trojan
Link:
https://tria.ge/reports/260224-q4th1sgz6g/
Behaviour
Modifies registry class
Scheduled Task/Job: Scheduled Task
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: MapViewOfSection
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
Uses Task Scheduler COM API
Command and Scripting Interpreter: JavaScript
Enumerates physical storage devices
System Location Discovery: System Language Discovery
Suspicious use of SetThreadContext
Adds Run key to start application
Looks up external IP address via web service
Checks computer location settings
Drops startup file
Executes dropped EXE
Loads dropped DLL
Badlisted process makes network request
STRRAT
Strrat family
Malware Config
C2 Extraction:
jareyo.duckdns.org:5610
Malware family:
FormBook
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Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/dc8a316ddc4d/report/overview.html
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Formbook
Score:
1.00
Link:
https://yomi.yoroi.company/submissions/dc8a316ddc4d56791f78f417e0fa86f36a545f58a64ba165ae6ff41c91068983

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: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