MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 c13fba2aea6bcca90506a37d2145cabd8433f882cf9c2fd71971f91c6e0dcd95. 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: c13fba2aea6bcca90506a37d2145cabd8433f882cf9c2fd71971f91c6e0dcd95
SHA3-384 hash: 47fcedf7cfeeedc34b9999839bdd1cc5af76cbd51b5c74f63e76765fe903f7b4e79e81db0d82ab89ee5da4fa8b552a39
SHA1 hash: f5dfadc9d0c3e59323bcb06bb31343fcfa4773bc
MD5 hash: 639f0466925f1d3f2f09d684e10ced5c
humanhash: mike-solar-iowa-queen
File name:fattura n. AR00881673·pdf.js
Download: download sample
Signature Formbook
Create hunting rule
File size:389'296 bytes
First seen:2025-10-06 11:17:03 UTC
Last seen:Never
File type:Java Script (JS) js
MIME type:text/plain
ssdeep 6144:AB0BjBkBkFB7BzBdBOB6BKBmBnBsB2BYBwBrBTByBbBAB/BSBfBGB9:Wqta4l9/UAQMBicOGVd4FW5YZs9
Threatray 1'756 similar samples on MalwareBazaar
TLSH T14C846B61EC25166B8F8B2389ACA51795CAFD85450A2350F2F7DE4B4D720A8ECC37E374
Magika javascript
Reporter abuse_ch
Tags:FormBook js

Intelligence

File Origin
# of uploads :
1
# of downloads :
73
Origin country :
SE SE
Vendor Threat Intelligence
Verdict:
Malicious
Score:
70%
Link:
https://cyber-fortress.com/docs/result/index.php?id=68e3a5636bc7e25d18cc4e76
Tags:
stration spawn
Verdict:
Suspicious
Threat level:
  5/10
Confidence:
100%
Tags:
fingerprint
Link:
https://www.filescan.io/uploads/68e3a591c74bd2958b15edbd/reports/82f5ede0-eb4a-49e5-ae06-ca96864df8b2/overview
Verdict:
Unknown
Link:
https://www.hybrid-analysis.com/sample/c13fba2aea6bcca90506a37d2145cabd8433f882cf9c2fd71971f91c6e0dcd95
Verdict:
Malicious
File Type:
js
First seen:
2025-10-06T04:32:00Z UTC
Last seen:
2025-10-07T08:22:00Z UTC
Hits:
~100
Link:
https://opentip.kaspersky.com/c13fba2aea6bcca90506a37d2145cabd8433f882cf9c2fd71971f91c6e0dcd95/results?tab=lookup
Result
Threat name:
FormBook, GuLoader
Create hunting rule
Detection:
malicious
Classification:
troj.expl.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1789697
Signature
Creates processes via WMI
Early bird code injection technique detected
Found suspicious powershell code related to unpacking or dynamic code loading
Hides threads from debuggers
JavaScript source code contains functionality to generate code involving a shell, file or stream
Loading BitLocker PowerShell Module
Malicious sample detected (through community Yara rule)
Maps a DLL or memory area into another process
Queries sensitive service information (via WMI, Win32_LogicalDisk, often done to detect sandboxes)
Queues an APC in another process (thread injection)
Sigma detected: WScript or CScript Dropper
Suspicious execution chain found
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 GuLoader
Yara detected Powershell decode and execute
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 1789697 Sample: fattura n. AR00881673#U00b7pdf.js Startdate: 06/10/2025 Architecture: WINDOWS Score: 100 34 drive.usercontent.google.com 2->34 36 drive.google.com 2->36 54 Malicious sample detected (through community Yara rule) 2->54 56 Yara detected FormBook 2->56 58 Yara detected GuLoader 2->58 60 3 other signatures 2->60 8 powershell.exe 34 2->8         started        11 wscript.exe 1 1 2->11         started        13 svchost.exe 1 1 2->13         started        signatures3 process4 dnsIp5 62 Early bird code injection technique detected 8->62 64 Writes to foreign memory regions 8->64 66 Found suspicious powershell code related to unpacking or dynamic code loading 8->66 76 4 other signatures 8->76 16 msiexec.exe 6 8->16         started        19 conhost.exe 8->19         started        68 Wscript starts Powershell (via cmd or directly) 11->68 70 Windows Scripting host queries suspicious COM object (likely to drop second stage) 11->70 72 Suspicious execution chain found 11->72 74 Creates processes via WMI 11->74 21 powershell.exe 14 28 11->21         started        42 127.0.0.1 unknown unknown 13->42 signatures6 process7 dnsIp8 44 Maps a DLL or memory area into another process 16->44 46 Hides threads from debuggers 16->46 24 NdLvEfXrej4.exe 16->24 injected 26 GPL2jxKGKdVL.exe 16->26 injected 28 YPuVn1hDH2YliA.exe 16->28 injected 30 WDOOc7LYYfwE6.exe 16->30 injected 38 drive.google.com 142.250.217.238, 443, 49683, 49693 GOOGLEUS United States 21->38 40 drive.usercontent.google.com 142.250.64.193, 443, 49684, 49694 GOOGLEUS United States 21->40 48 Found suspicious powershell code related to unpacking or dynamic code loading 21->48 50 Queries sensitive service information (via WMI, Win32_LogicalDisk, often done to detect sandboxes) 21->50 52 Loading BitLocker PowerShell Module 21->52 32 conhost.exe 21->32         started        signatures9 process10
Score:
93%
Verdict:
Malware
File Type:
SCRIPT
Link:
https://malprob.io/report/c13fba2aea6bcca90506a37d2145cabd8433f882cf9c2fd71971f91c6e0dcd95
Gathering data
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/c13fba2aea6bcca90506a37d2145cabd8433f882cf9c2fd71971f91c6e0dcd95/
Verdict:
Malicious
Threat:
Family.FORMBOOK
Link:
https://tip.neiki.dev/file/c13fba2aea6bcca90506a37d2145cabd8433f882cf9c2fd71971f91c6e0dcd95
Threat name:
Script-JS.Trojan.GuLoader
Create hunting rule
Status:
Malicious
First seen:
2025-10-06 10:41:44 UTC
File Type:
Text
AV detection:
6 of 24 (25.00%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=ye73ukxknpgksbigun6scrokxwcdh6ecz6oc7vyzoh4ry3qnzwkq._file
Verdict:
malicious
Label(s):
formbook
Create hunting rule
Similar samples:
13bcb497842eb18f0aa69fb89e7b90f30b2d424819fd93e526f647dc82ed46a3
Formbook
6c395098c834dc56befed790a3f47f542376b19d4bc10e34b23e315afe8108e9
Formbook
6c4c09f6f9ed8e1d1d2d14c4680d57dee044886c77d7bb0c7426e80fa3fd47ec
Formbook
abc25960c92c881ef69a94a3d8a96faacfdf0619327332509227c3cadc5f13b0
Formbook
ad014d604ccb527054c3e00fbc8f963b916bd22f3b571275c8a149881f4d1daa
Formbook
b1458b43d78afd118a7853e1985e9e2ad6b147af13d5100b786d20497ebd9a60
Formbook
d510513ccbb33c26a814ac58e781688d20780ee08a85f5962a94866cf988a0a4
Formbook
e715ca77bca80baec611ba2f5982ce26a52211523f2db2115165e593b65ff6ef
Formbook
e837ce85c10c216e724d02358e910fa27e6b1c93dff8e51ed71e54e1970c58ce
Formbook
error
Formbook
f6469663f0a38647f54764309023eefa956a37e381b7b6fabe2882b75464bd8b
Formbook
+ 1'746 additional samples on MalwareBazaar
Result
Malware family:
formbook
Create hunting rule
Score:
  10/10
Tags:
family:formbook discovery execution rat spyware stealer trojan
Link:
https://tria.ge/reports/251006-nel2jaak9s/
Behaviour
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: MapViewOfSection
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
Command and Scripting Interpreter: JavaScript
System Location Discovery: System Language Discovery
Suspicious use of NtCreateThreadExHideFromDebugger
Suspicious use of NtSetInformationThreadHideFromDebugger
Legitimate hosting services abused for malware hosting/C2
Badlisted process makes network request
Formbook payload
Formbook
Formbook family
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/c13fba2aea6bcca90506a37d2145cabd8433f882cf9c2fd71971f91c6e0dcd95

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_AllMal_Detector
Create hunting rule
Author:DiegoAnalytics
Description:CrossPlatform All Malwares Detector: Detect PE, ELF, Mach-O, scripts, archives; overlay, obfuscation, encryption, spoofing, hiding, high entropy, network communication
Rule name:Sus_CMD_Powershell_Usage
Create hunting rule
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