MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 fd55dac59db1d3b1537ed0668b0dabaaa1cc6b178ef5c8cb758b7290f7e34030. 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: 9


Intelligence 9 IOCs YARA 1 File information Comments
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SHA256 hash: fd55dac59db1d3b1537ed0668b0dabaaa1cc6b178ef5c8cb758b7290f7e34030
SHA3-384 hash: d38f237afbb84bebc1c77b8d7b63ac90c3bdd53ca785629e8550eefce47a46002d321bc839adc4e23a0ecbef731b1476
SHA1 hash: e90716fee8249877497f0415e3fd75cddf0ed24f
MD5 hash: 7c7325af3422beccabf4f29a87b2f22b
humanhash: wolfram-burger-jersey-leopard
File name:PO#201495.pdf.JS
Download: download sample
Signature Formbook
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File size:2'626'581 bytes
First seen:2025-05-23 08:29:47 UTC
Last seen:Never
File type:Java Script (JS) js
MIME type:text/plain
ssdeep 768:HnY1xARqxSPNxQl8x1kZkM13xdGsxLkDxOuJKxyHvWP8xOl5b4/x5lzxNwGxniDf:HVkZk4/USCrzVlscNcf9
Threatray 86 similar samples on MalwareBazaar
TLSH T12AC5E9D5EA028BC0D2130EDE2D21BF1A189BF866DBD7334D1359BCD64976495EBE0C22
Magika javascript
Reporter abuse_ch
Tags:FormBook js

Intelligence

File Origin
# of uploads :
1
# of downloads :
433
Origin country :
NL NL
Vendor Threat Intelligence
Detection(s):
SecuriteInfo.com.PUA.JS.Obfus-2525.UNOFFICIAL
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SecuriteInfo.com.PUA.JS.Obfus-2179.UNOFFICIAL
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Sanesecurity.Malware.31320.UNOFFICIAL
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Verdict:
Malicious
Score:
97.4%
Link:
https://cyber-fortress.com/docs/result/index.php?id=683034724912a6b9dd4c51de
Tags:
obfuscate xtreme shell
Verdict:
Malicious
Labled as:
SVM:TrojanDownloader/JS.Nemucod
Link:
https://www.hybrid-analysis.com/sample/fd55dac59db1d3b1537ed0668b0dabaaa1cc6b178ef5c8cb758b7290f7e34030
Result
Threat name:
FormBook
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Detection:
malicious
Classification:
troj.spyw.expl.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1697599
Signature
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
Queues an APC in another process (thread injection)
Sigma detected: Base64 Encoded PowerShell Command Detected
Sigma detected: PowerShell Base64 Encoded FromBase64String Cmdlet
Sigma detected: Suspicious Parent Double Extension File Execution
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)
Uses an obfuscated file name to hide its real file extension (double extension)
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
Yara detected Powershell decode and execute
Yara detected Powershell download and execute
Yara detected UAC Bypass using CMSTP
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 1697599 Sample: PO#201495.pdf.JS.js Startdate: 23/05/2025 Architecture: WINDOWS Score: 100 36 www.zilladrop.site 2->36 38 lo.seculogo.sa.com 2->38 40 6 other IPs or domains 2->40 54 Suricata IDS alerts for network traffic 2->54 56 Malicious sample detected (through community Yara rule) 2->56 58 Multi AV Scanner detection for submitted file 2->58 60 10 other signatures 2->60 11 wscript.exe 1 1 2->11         started        signatures3 process4 signatures5 64 JScript performs obfuscated calls to suspicious functions 11->64 66 Suspicious powershell command line found 11->66 68 Wscript starts Powershell (via cmd or directly) 11->68 70 2 other signatures 11->70 14 powershell.exe 14 15 11->14         started        process6 dnsIp7 42 lo.seculogo.sa.com 172.93.120.11, 443, 49709 HOST4GEEKS-LLCUS United States 14->42 44 webmail.aruba.it 62.149.158.90, 443, 49708 ARUBA-ASNIT Italy 14->44 80 Writes to foreign memory regions 14->80 82 Injects a PE file into a foreign processes 14->82 18 MSBuild.exe 14->18         started        21 conhost.exe 14->21         started        23 MSBuild.exe 14->23         started        signatures8 process9 signatures10 52 Maps a DLL or memory area into another process 18->52 25 3LjqI6sFwy.exe 18->25 injected process11 signatures12 62 Maps a DLL or memory area into another process 25->62 28 chkntfs.exe 13 25->28         started        process13 signatures14 72 Tries to steal Mail credentials (via file / registry access) 28->72 74 Tries to harvest and steal browser information (history, passwords, etc) 28->74 76 Modifies the context of a thread in another process (thread injection) 28->76 78 3 other signatures 28->78 31 9kNrk8zS.exe 28->31 injected 34 firefox.exe 28->34         started        process15 dnsIp16 46 www.zilladrop.site 203.161.42.71, 49712, 49713, 49714 VNPT-AS-VNVNPTCorpVN Malaysia 31->46 48 www.fbgiq.town 137.175.35.13, 49711, 80 PEGTECHINCUS United States 31->48 50 www.covoai.live 121.254.178.233, 49716, 49717, 49718 LGDACOMLGDACOMCorporationKR Korea Republic of 31->50
Score:
98%
Verdict:
Malware
File Type:
SCRIPT
Link:
https://malprob.io/report/fd55dac59db1d3b1537ed0668b0dabaaa1cc6b178ef5c8cb758b7290f7e34030
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/fd55dac59db1d3b1537ed0668b0dabaaa1cc6b178ef5c8cb758b7290f7e34030/
Threat name:
Script-JS.Trojan.Sonbokli
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Status:
Malicious
First seen:
2025-05-22 13:00:15 UTC
File Type:
Text (JavaScript)
AV detection:
8 of 24 (33.33%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=7vk5vrm5whj3cu362btiwdnlvkq4y2yxr324rs3vrnzjb57diaya._file
Verdict:
malicious
Label(s):
formbook
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Similar samples:
1954852d49e10ab60251b4d441456bde537c7f349297c2c9c972aaf6cd9f5065
Formbook
25d96cd43fe35d1ab7dd8be793a2b54595876ba8514ab273efe59a345afaae14
Formbook
55021119b7a7a05fea8b2141242d77bf417462a9a55c7ebcf8a01fda46072602
Formbook
5ad1335c5ee3383a9df8dc9cbb6ae96d79e81485c7c239675bc2bbb0b9499d39
Formbook
6d76eb3bddde98330c44eaad153adab619c41faa8fda8f32802b6d8046188618
Formbook
6e7b45cff195d3b5234ecb0d64022233bb382524960fee75316ffeb3c87ad102
Formbook
9568e856bd7e2469908c9ee8dfc816f94662dd9643e34c6ec6d3153656e82247
Formbook
9f28f82d21fe99d0efdcab403f73870d68fd94e6d0f762e658d923ccd1e7424c
Formbook
a99dcf9a006a8bba7ff7a934fdd7d1d4232ee5ead022dcdc36a2bb9f8e3242d6
Formbook
b202388fc74fa1cbbbd75f498fbd1a0f44a13494d021840fc897690792795d7a
Formbook
error
Formbook
+ 76 additional samples on MalwareBazaar
Result
Malware family:
n/a
Score:
  10/10
Tags:
execution
Link:
https://tria.ge/reports/250523-kel5rabn8t/
Behaviour
Suspicious behavior: EnumeratesProcesses
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
Command and Scripting Interpreter: JavaScript
Enumerates physical storage devices
Suspicious use of SetThreadContext
Checks computer location settings
Blocklisted process makes network request
Command and Scripting Interpreter: PowerShell
Malware Config
Dropper Extraction:
https://webmail.aruba.it/smart/cgi-bin/ajaxfile?ACT_FIL_DL=1&PUBLICUID=@1.VFMxM0RLUmlpak5VUCt4RkdEU3luR3VzRmxneHAzUStkTzBJZythWmhBYXR2Rng3R2dCNVl5V3djYTBnV0luVA==
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/fd55dac59db1d3b1537ed0668b0dabaaa1cc6b178ef5c8cb758b7290f7e34030

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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File information

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

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