MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 13ac73f4d4f28b8ed030ed83ac64a9d3fb59a7b54588c3f91d1a61806e88caaa. 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 1 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 13ac73f4d4f28b8ed030ed83ac64a9d3fb59a7b54588c3f91d1a61806e88caaa
SHA3-384 hash: 6a051ab696502b1287564fb17a3deb6685fe4fc764a03156c4d8c1b8a54aec2c0c7712564c7b4a676249853c5c531a41
SHA1 hash: 9d477de3e7064cc72a0cfe7e5faa810fd17dda79
MD5 hash: d06d6121c2eb0430ccd331f68dd1194c
humanhash: bulldog-eighteen-five-hydrogen
File name:SW_2752369.js
Download: download sample
Signature Formbook
Create hunting rule
File size:980'086 bytes
First seen:2026-08-12 08:20:14 UTC
Last seen:Never
File type:Java Script (JS) js
MIME type:text/plain
ssdeep 24576:QkKfhbopIO2wlOFaQu8fl9euaT/Gj6eNmjXn1JH5mNP:SK21uwHohkM1JyP
TLSH T14C258DBC5362BB450CA8A7EA12039DD814F1A9D51580B77CDF09B9ADB522844CBF48FF
Magika javascript
Reporter abuse_ch
Tags:FormBook js

Intelligence

File Origin
# of uploads :
1
# of downloads :
125
Origin country :
SE SE
Vendor Threat Intelligence
No detections
Verdict:
Unknown
Threat level:
  2.5/10
Confidence:
100%
Tags:
encrypted obfuscated repaired
Link:
https://www.filescan.io/uploads/6a7c2cdf62e620dae1d9ec58/reports/26302fe3-3a8d-43a5-8b87-bef4d459a797/overview
Verdict:
Unknown
Link:
https://www.hybrid-analysis.com/sample/13ac73f4d4f28b8ed030ed83ac64a9d3fb59a7b54588c3f91d1a61806e88caaa
Verdict:
Malicious
File Type:
js
First seen:
2026-08-11T14:26:00Z UTC
Last seen:
2026-08-12T12:49:00Z UTC
Hits:
~100
Link:
https://opentip.kaspersky.com/13ac73f4d4f28b8ed030ed83ac64a9d3fb59a7b54588c3f91d1a61806e88caaa/results?tab=lookup
Result
Threat name:
FormBook
Create hunting rule
Detection:
malicious
Classification:
evad.troj.spyw.expl
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1956651
Signature
Antivirus detection for URL or domain
Binary is likely a compiled AutoIt script file
Bypasses PowerShell execution policy
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
Maps a DLL or memory area into another process
Modifies the context of a thread in another process (thread injection)
Performs DNS queries to domains with low reputation
Queues an APC in another process (thread injection)
Sigma detected: Dot net compiler compiles file from suspicious location
Sigma detected: Script Interpreter Execution From Suspicious Folder
Sigma detected: Suspicious PowerShell Parameter Substring
Sigma detected: Suspicious Script Execution From Temp Folder
Sigma detected: WScript or CScript Dropper
Sigma detected: WScript or CScript Dropper - File
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)
Unusual module load detection (module proxying)
Windows Scripting host queries suspicious COM object (likely to drop second stage)
Windows Shell Script Host drops VBS files
Writes to foreign memory regions
WScript reads language and country specific registry keys (likely country aware script)
Wscript starts Powershell (via cmd or directly)
Yara detected AntiVM3
Yara detected FormBook
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 1956651 Sample: SW_2752369.js Startdate: 12/08/2026 Architecture: WINDOWS Score: 100 59 www.squad4game.xyz 2->59 61 www.yishengbee.com 2->61 63 27 other IPs or domains 2->63 77 Suricata IDS alerts for network traffic 2->77 79 Antivirus detection for URL or domain 2->79 81 Yara detected FormBook 2->81 85 8 other signatures 2->85 12 wscript.exe 1 6 2->12         started        signatures3 83 Performs DNS queries to domains with low reputation 59->83 process4 file5 51 C:\Users\user\AppData\...\svc_104200_d6f4, ASCII 12->51 dropped 53 C:\Users\user\AppData\...\log_42563_d7df.vbs, ASCII 12->53 dropped 55 C:\Users\user\AppData\...\log_18596_d6e5, ASCII 12->55 dropped 57 C:\Users\user\AppData\...\clr_35064_d704.ps1, C 12->57 dropped 109 JScript performs obfuscated calls to suspicious functions 12->109 111 Suspicious powershell command line found 12->111 113 Wscript starts Powershell (via cmd or directly) 12->113 115 5 other signatures 12->115 16 wscript.exe 1 12->16         started        signatures6 process7 signatures8 71 Suspicious powershell command line found 16->71 73 Wscript starts Powershell (via cmd or directly) 16->73 75 WScript reads language and country specific registry keys (likely country aware script) 16->75 19 powershell.exe 23 16->19         started        process9 file10 47 C:\Users\user\AppData\...\dabftncx.cmdline, Unicode 19->47 dropped 87 Writes to foreign memory regions 19->87 89 Injects a PE file into a foreign processes 19->89 23 MSBuild.exe 19->23         started        26 csc.exe 3 19->26         started        29 conhost.exe 19->29         started        signatures11 process12 file13 99 Modifies the context of a thread in another process (thread injection) 23->99 101 Maps a DLL or memory area into another process 23->101 103 Queues an APC in another process (thread injection) 23->103 105 3 other signatures 23->105 31 pBj3JKQQ.exe 23->31 injected 49 C:\Users\user\AppData\Local\...\dabftncx.dll, PE32 26->49 dropped 34 cvtres.exe 1 26->34         started        signatures14 process15 signatures16 117 Binary is likely a compiled AutoIt script file 31->117 119 Maps a DLL or memory area into another process 31->119 121 Found direct / indirect Syscall (likely to bypass EDR) 31->121 36 sc.exe 13 31->36         started        process17 signatures18 91 Tries to steal Mail credentials (via file / registry access) 36->91 93 Tries to harvest and steal browser information (history, passwords, etc) 36->93 95 Modifies the context of a thread in another process (thread injection) 36->95 97 3 other signatures 36->97 39 i4xbnIYl.exe 36->39 injected 43 msedge.exe 36->43         started        45 firefox.exe 36->45         started        process19 dnsIp20 65 ngx-out.op.ganji.com 43.144.202.136, 50064, 50065, 50066 TENCENT-NET-APShenzhenTencentComputerSystemsCompanyLimitedCN China 39->65 67 www.kuntec-alloy.com 43.157.242.193, 50023, 50024, 50025 TENCENT-NET-AP-CNTencentBuildingKejizhongyiAvenueCN Indonesia 39->67 69 13 other IPs or domains 39->69 107 Binary is likely a compiled AutoIt script file 39->107 signatures21
Score:
87%
Verdict:
Malware
File Type:
SCRIPT
Link:
https://malprob.io/report/13ac73f4d4f28b8ed030ed83ac64a9d3fb59a7b54588c3f91d1a61806e88caaa
Gathering data
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/13ac73f4d4f28b8ed030ed83ac64a9d3fb59a7b54588c3f91d1a61806e88caaa/
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=cowhh5gu6kfy5ubq5wb2yzfj2p5vtj5viwemh6i5djqya3uizkva._file
Verdict:
malicious
Label(s):
Formbook
Create hunting rule
Link:
https://reports.threatray.com/384a5914-8f78-4d27-9e8e-15f009351a71
Result
Malware family:
formbook
Create hunting rule
Score:
  10/10
Tags:
family:formbook adware collection discovery execution rat spyware stealer trojan
Link:
https://tria.ge/reports/260812-j8x9facr61/
Behaviour
Suspicious use of FindShellTrayWindow
Suspicious use of WriteProcessMemory
outlook_office_path
Modifies Internet Explorer settings
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: GetForegroundWindowSpam
Suspicious behavior: MapViewOfSection
Suspicious use of AdjustPrivilegeToken
Command and Scripting Interpreter: JavaScript
Enumerates physical storage devices
System Location Discovery: System Language Discovery
Launches sc.exe
Executes a VBScript file via the Windows Script Host.
Suspicious use of SetThreadContext
Accesses Microsoft Outlook profiles
Checks computer location settings
Command and Scripting Interpreter: PowerShell
Family: Formbook
Formbook payload
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/13ac73f4d4f28b8ed030ed83ac64a9d3fb59a7b54588c3f91d1a61806e88caaa

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:SUSP_obfuscated_JS_obfuscatorio
Create hunting rule
Author:@imp0rtp3
Description:Detect JS obfuscation done by the js obfuscator (often malicious)
Reference:https://obfuscator.io

File information

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

Comments