MalwareBazaar Database
You are currently viewing the MalwareBazaar entry for SHA256 ab8f034b89a3f3f3c7a77d3e5824fd4e4deb9734aa650cc78b0c3001e93a2a48. 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
| SHA256 hash: | ab8f034b89a3f3f3c7a77d3e5824fd4e4deb9734aa650cc78b0c3001e93a2a48 |
|---|---|
| SHA3-384 hash: | 9351c27b77aa25183027ff52a6d03d9d6cbe31237dfbfc4c81fcff3ec1f042e4facba38cca66fecc770a5e0ededad7e9 |
| SHA1 hash: | 353a620b9333a460bfdf7ca91fe45b4ea9d8d21e |
| MD5 hash: | 8b74bdc4e8d9dc5ecf4ecf6feb239058 |
| humanhash: | fish-vermont-alabama-april |
| File name: | SOA-12232025.js |
| Download: | download sample |
| Signature | Formbook |
| File size: | 4'623'778 bytes |
| First seen: | 2025-12-25 14:29:51 UTC |
| Last seen: | 2026-01-02 14:49:42 UTC |
| File type: |  js |
| MIME type: | text/plain |
| ssdeep | 192:U+TcvmxpZTNnUoRALvNZu3vjFK0Ab8ErAuR:gW5zErAm |
| Threatray | 2'409 similar samples on MalwareBazaar |
| TLSH | T17D26DBA2678E498189E07F131EB1B82FFD54D09E70BAD3387632A2C447291E1CB67757 |
| Magika | javascript |
| Reporter |  abuse_ch |
| Tags: | FormBook js |
Intelligence
File Origin
# of uploads :
2
# of downloads :
101
Origin country :
SEVendor Threat Intelligence
No detections
Verdict:
Malicious
Score:
94.9%
Tags:
obfuscate xtreme shell
Verdict:
Malicious
Threat level:
10/10
Confidence:
100%
Tags:
anti-vm base64 base64 fingerprint obfuscated obfuscated overlay powershell repaired
Verdict:
Malicious
Labled as:
JS/TrojanDownloader.Agent
Verdict:
Malicious
File Type:
js
First seen:
2025-12-23T13:29:00Z UTC
Last seen:
2025-12-27T12:26:00Z UTC
Hits:
~1000
Detections:
Trojan-PSW.Win32.Stealer.sb Trojan.MSIL.Miner.sb Trojan.Agentb.TCP.C&C Trojan.JS.SAgent.sb Trojan-Spy.Win32.Noon.sb Trojan-Downloader.MSIL.Seraph.d Trojan-Downloader.MSIL.Agent.c Trojan.MSIL.Crypt.sb Backdoor.Agent.HTTP.C&C HEUR:Trojan.Script.SAgent.gen HEUR:Trojan.Script.Generic
Result
Threat name:
FormBook
Detection:
malicious
Classification:
troj.spyw.expl.evad
Score:
100 / 100
Signature
.NET source code contains potential unpacker
Antivirus detection for URL or domain
Contains functionality to check if a debugger is running (CheckRemoteDebuggerPresent)
Creates processes via WMI
Injects a PE file into a foreign processes
JavaScript source code contains functionality to generate code involving a shell, file or stream
Joe Sandbox ML detected suspicious sample
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: PowerShell Base64 Encoded Reflective Assembly Load
Sigma detected: Suspicious Process Parents
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)
Unusual module load detection (module proxying)
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
Behaviour
Behavior Graph:
Score:
3%
Verdict:
Benign
File Type:
SCRIPT
Verdict:
inconclusive
YARA:
1 match(es)
Verdict:
Malicious
Threat:
Family.FORMBOOK
Threat name:
Win32.Trojan.Generic
Status:
Suspicious
First seen:
2025-12-23 17:05:14 UTC
File Type:
Binary
AV detection:
9 of 24 (37.50%)
Threat level:
5/5
Detection(s):
Suspicious file
Verdict:
malicious
Label(s):
formbook
Similar samples:
+ 2'399 additional samples on MalwareBazaar
Result
Malware family:
formbook
Score:
10/10
Tags:
family:formbook execution rat spyware stealer trojan
Behaviour
Suspicious behavior: EnumeratesProcesses
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
Command and Scripting Interpreter: JavaScript
Suspicious use of SetThreadContext
Badlisted process makes network request
Command and Scripting Interpreter: PowerShell
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:
Suspicious File
Score:
0.55
File information
The table below shows additional information about this malware sample such as delivery method and external references.
No further information available
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