MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 a1da3b0fc4386d3a5dab8dc264b2475e0218fdce04e5f28f90b834881211ceba. 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: 7


Intelligence 7 IOCs YARA 25 File information Comments
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SHA256 hash: a1da3b0fc4386d3a5dab8dc264b2475e0218fdce04e5f28f90b834881211ceba
SHA3-384 hash: 906e0ab0451fa1f995cce5cd90cbf73ff49bb37905de8f625939b6a0ea5e38e66e64a6ad9f4f03b178131b59e1f038eb
SHA1 hash: 7bd52731ef618e945f6fa128eada844d9aeeeb21
MD5 hash: d93c7c2a71bde53cbec6e7c6f2bc8ab0
humanhash: two-lamp-quebec-twenty
File name:01032026_1636_PO-TG048432026.js.gz
Download: download sample
Signature Formbook
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File size:627'724 bytes
First seen:2026-03-01 17:18:41 UTC
Last seen:Never
File type: gz
MIME type:application/gzip
ssdeep 12288:dDIW+c2FC/n1gsIWsqPbJC+kQJ7yQHjfXIihNv4E1S45:1IW+c+CTIrkC+pGmjfXIiPv4945
TLSH T1BFD43326C5B254434CEB1ABAC8C22DD4A702BD4B96204FE0B76576F4FBBE30C42935B5
Magika gzip
Reporter BastianHein
Tags:FormBook gz

Intelligence

File Origin
# of uploads :
1
# of downloads :
162
Origin country :
CL CL
File Archive Information

This file archive contains 1 file(s), sorted by their relevance:

File name:PO-TG048432026.js
File size:1'278'003 bytes
SHA256 hash: 9e1f9919498809e79281a8ec7db2e24bef7b5b631792bd28c0716eb1a1fed35c
MD5 hash: c7075e56b54dc4bb578726da127b4f0b
MIME type:text/plain
Signature Formbook
Vendor Threat Intelligence
No detections
Detection(s):
Sanesecurity.Foxhole.GZip_js.UNOFFICIAL
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Verdict:
Malicious
Score:
70%
Link:
https://cyber-fortress.com/docs/result/index.php?id=699ff1c7c950ab5d9ab1c55f
Tags:
downloader virus
Verdict:
Unknown
Link:
https://www.hybrid-analysis.com/sample/a1da3b0fc4386d3a5dab8dc264b2475e0218fdce04e5f28f90b834881211ceba
Verdict:
Malicious
File Type:
gz
Link:
https://opentip.kaspersky.com/a1da3b0fc4386d3a5dab8dc264b2475e0218fdce04e5f28f90b834881211ceba/results?tab=lookup
Score:
100%
Verdict:
Malware
File Type:
ARCHIVE
Link:
https://malprob.io/report/a1da3b0fc4386d3a5dab8dc264b2475e0218fdce04e5f28f90b834881211ceba
Verdict:
inconclusive
YARA:
1 match(es)
Tags:
GZip Archive
Link:
https://app.malva.re/file/d93c7c2a71bde53cbec6e7c6f2bc8ab0
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/a1da3b0fc4386d3a5dab8dc264b2475e0218fdce04e5f28f90b834881211ceba/
Verdict:
Malicious
Threat:
Family.FORMBOOK
Link:
https://tip.neiki.dev/file/a1da3b0fc4386d3a5dab8dc264b2475e0218fdce04e5f28f90b834881211ceba
Threat name:
Script-JS.Backdoor.FormBook
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Status:
Malicious
First seen:
2026-03-01 16:42:25 UTC
File Type:
Binary (Archive)
Extracted files:
1
AV detection:
13 of 24 (54.17%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=uhndwd6ehbwtuxnlrxbgjmshlybbr7ooats7fd4qxa2iqeqrz25a._file
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Legit
Score:
0.00
Link:
https://yomi.yoroi.company/submissions/a1da3b0fc4386d3a5dab8dc264b2475e0218fdce04e5f28f90b834881211ceba

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:Base64_Encoded_Powershell_Directives
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Rule name:cobalt_strike_tmp01925d3f
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Author:The DFIR Report
Description:files - file ~tmp01925d3f.exe
Reference:https://thedfirreport.com
Rule name:CP_Script_Inject_Detector
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Author:DiegoAnalytics
Description:Detects attempts to inject code into another process across PE, ELF, Mach-O binaries
Rule name:DebuggerCheck__API
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Reference:https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara
Rule name:DebuggerCheck__GlobalFlags
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Reference:https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara
Rule name:DebuggerCheck__QueryInfo
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Reference:https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara
Rule name:DebuggerHiding__Active
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Reference:https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara
Rule name:DebuggerHiding__Thread
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Reference:https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara
Rule name:DetectEncryptedVariants
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Author:Zinyth
Description:Detects 'encrypted' in ASCII, Unicode, base64, or hex-encoded
Rule name:dgaagas
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Author:Harshit
Description:Uses certutil.exe to download a file named test.txt
Rule name:Formbook
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Author:JPCERT/CC Incident Response Group
Description:detect Formbook in memory
Reference:internal research
Rule name:golang_bin_JCorn_CSC846
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Author:Justin Cornwell
Description:CSC-846 Golang detection ruleset
Rule name:MD5_Constants
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Author:phoul (@phoul)
Description:Look for MD5 constants
Rule name:meth_stackstrings
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Author:Willi Ballenthin
Rule name:pe_detect_tls_callbacks
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Rule name:pe_no_import_table
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Description:Detect pe file that no import table
Rule name:RIPEMD160_Constants
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Author:phoul (@phoul)
Description:Look for RIPEMD-160 constants
Rule name:SEH__vectored
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Reference:https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara
Rule name:SHA1_Constants
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Author:phoul (@phoul)
Description:Look for SHA1 constants
Rule name:TH_Win_ETW_Bypass_2025_CYFARE
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Author:CYFARE
Description:Windows ETW Bypass Detection Rule - 2025
Reference:https://cyfare.net/
Rule name:Windows_Trojan_Formbook
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Author:@malgamy12
Rule name:Windows_Trojan_Formbook_1112e116
Create hunting rule
Author:Elastic Security
Reference:https://www.elastic.co/security-labs/formbook-adopts-cab-less-approach
Rule name:win_formbook_auto
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Author:Felix Bilstein - yara-signator at cocacoding dot com
Description:Detects win.formbook.
Rule name:win_formbook_g0
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Author:Slavo Greminger, SWITCH-CERT
Rule name:win_formbook_w0
Create hunting rule
Author:@malgamy12

File information

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

Comments