MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 51379f4acb028f106dff9e97d2fffe91ef2ed5eb377dfdafbe87b14d4f64044e. 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: 10


Intelligence 10 IOCs YARA 1 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 51379f4acb028f106dff9e97d2fffe91ef2ed5eb377dfdafbe87b14d4f64044e
SHA3-384 hash: 4e5810777259721ab3c0e9061b334e96b1a361407fa3f2662f108e4ad751bc8a8eb695743963660cf885fda8c95baaca
SHA1 hash: 85a9f1bcbfdc1a05c49550b447675044c5bbfc0e
MD5 hash: 37cd3b88d603cf06ac5d3f0bb60bc2aa
humanhash: uncle-tango-uniform-one
File name:mohafile.js
Download: download sample
Signature Formbook
Create hunting rule
File size:1'228'947 bytes
First seen:2026-07-16 06:59:49 UTC
Last seen:Never
File type:Java Script (JS) js
MIME type:text/plain
ssdeep 24576:+IOjh6Kz6O3FIMi6IPqbUTX1W/tjwvClgRBn9CF9C7DhBy60K1:+x9xi3qog/oC+tCWm6f
Threatray 1 similar samples on MalwareBazaar
TLSH T1E9459E6A0B6C401ADEC9A12B264D65C3F8B1AF01F170B450E7B849B5F6CDF8930796E7
Magika javascript
Reporter abuse_ch
Tags:FormBook js

Intelligence

File Origin
# of uploads :
1
# of downloads :
131
Origin country :
SE SE
Vendor Threat Intelligence
No detections
Verdict:
Malicious
Score:
70%
Link:
https://cyber-fortress.com/docs/result/index.php?id=6a58820756bd89099b556d51
Tags:
shell spawn sage
Verdict:
Suspicious
Threat level:
  5/10
Confidence:
100%
Tags:
encrypted obfuscated repaired
Link:
https://www.filescan.io/uploads/6a588208893a31f0256cf985/reports/1678eec8-234e-419a-a6c2-48b43d46b9aa/overview
Verdict:
Suspicious
Labled as:
SVM:TrojanDownloader/JS.MalBehav.gen
Link:
https://www.hybrid-analysis.com/sample/51379f4acb028f106dff9e97d2fffe91ef2ed5eb377dfdafbe87b14d4f64044e
Verdict:
Malicious
File Type:
js
First seen:
2026-07-16T03:43:00Z UTC
Last seen:
2026-07-16T03:52:00Z UTC
Hits:
~10
Link:
https://opentip.kaspersky.com/51379f4acb028f106dff9e97d2fffe91ef2ed5eb377dfdafbe87b14d4f64044e/results?tab=lookup
Result
Threat name:
FormBook
Create hunting rule
Detection:
malicious
Classification:
troj.spyw.expl.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1943358
Signature
Antivirus detection for URL or domain
Binary is likely a compiled AutoIt script file
Creates a thread in another existing process (thread injection)
Creates processes via WMI
Found direct / indirect Syscall (likely to bypass EDR)
Injects a PE file into a foreign processes
Joe Sandbox ML detected suspicious sample
Maps a DLL or memory area into another process
Modifies the context of a thread in another process (thread injection)
Queues an APC in another process (thread injection)
Sigma detected: Dot net compiler compiles file from suspicious location
Sigma detected: Suspicious Script Execution From Temp Folder
Sigma detected: WScript or CScript Dropper
Suricata IDS alerts for network traffic
Suspicious execution chain 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)
Uses netsh to modify the Windows network and firewall settings
Windows Scripting host queries suspicious COM object (likely to drop second stage)
Wscript starts Powershell (via cmd or directly)
Yara detected FormBook
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 1943358 Sample: mohafile.js Startdate: 16/07/2026 Architecture: WINDOWS Score: 100 57 w00f42c9.kasserver.com 2->57 59 tagstr.space 2->59 61 6 other IPs or domains 2->61 73 Suricata IDS alerts for network traffic 2->73 75 Antivirus detection for URL or domain 2->75 77 Yara detected FormBook 2->77 79 5 other signatures 2->79 13 wscript.exe 1 3 2->13         started        signatures3 process4 file5 55 C:\Users\user\AppData\...\dat_101780_adb.ps1, C 13->55 dropped 113 Wscript starts Powershell (via cmd or directly) 13->113 115 Windows Scripting host queries suspicious COM object (likely to drop second stage) 13->115 117 Suspicious execution chain found 13->117 119 Creates processes via WMI 13->119 17 powershell.exe 21 13->17         started        signatures6 process7 file8 51 C:\Users\user\AppData\...\e3xuijsz.cmdline, Unicode 17->51 dropped 69 Modifies the context of a thread in another process (thread injection) 17->69 71 Injects a PE file into a foreign processes 17->71 21 powershell.exe 17->21         started        24 csc.exe 3 17->24         started        27 conhost.exe 17->27         started        signatures9 process10 file11 89 Maps a DLL or memory area into another process 21->89 91 Creates a thread in another existing process (thread injection) 21->91 29 wX1NeG7iCK57H.exe 21->29 injected 32 WerFault.exe 3 21 21->32         started        53 C:\Users\user\AppData\Local\...\e3xuijsz.dll, PE32 24->53 dropped 34 cvtres.exe 1 24->34         started        signatures12 process13 signatures14 107 Binary is likely a compiled AutoIt script file 29->107 109 Maps a DLL or memory area into another process 29->109 111 Found direct / indirect Syscall (likely to bypass EDR) 29->111 36 findstr.exe 29->36         started        process15 signatures16 81 Modifies the context of a thread in another process (thread injection) 36->81 83 Maps a DLL or memory area into another process 36->83 85 Queues an APC in another process (thread injection) 36->85 87 2 other signatures 36->87 39 5fjBAM6xzfdg.exe 36->39 injected process17 signatures18 93 Binary is likely a compiled AutoIt script file 39->93 95 Maps a DLL or memory area into another process 39->95 97 Found direct / indirect Syscall (likely to bypass EDR) 39->97 42 netsh.exe 13 39->42         started        process19 signatures20 99 Tries to steal Mail credentials (via file / registry access) 42->99 101 Tries to harvest and steal browser information (history, passwords, etc) 42->101 103 Modifies the context of a thread in another process (thread injection) 42->103 105 3 other signatures 42->105 45 37JAs4qKQ.exe 42->45 injected 49 firefox.exe 42->49         started        process21 dnsIp22 63 an05-prod-x.cdn-ng.net 43.251.56.96, 49778, 49779, 49780 SKYCLOUD-NETSkycloudComputingcoLtdTW Taiwan 45->63 65 w00f42c9.kasserver.com 85.13.162.166, 49782, 49783, 49784 NMM-ASD-02742FriedersdorfHauptstrasse68DE Germany 45->65 67 2 other IPs or domains 45->67 121 Binary is likely a compiled AutoIt script file 45->121 signatures23
Score:
97%
Verdict:
Malware
File Type:
SCRIPT
Link:
https://malprob.io/report/51379f4acb028f106dff9e97d2fffe91ef2ed5eb377dfdafbe87b14d4f64044e
Gathering data
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/51379f4acb028f106dff9e97d2fffe91ef2ed5eb377dfdafbe87b14d4f64044e/
Gathering data
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=ke3z6swlakhra3p7t2l5f776shxs5vplg5673l56q6yu2t3earha._file
Verdict:
malicious
Label(s):
formbook
Create hunting rule
Similar samples:
error
Formbook
Result
Malware family:
n/a
Score:
  10/10
Tags:
execution
Link:
https://tria.ge/reports/260716-htm99aax3x/
Behaviour
Suspicious behavior: EnumeratesProcesses
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
Command and Scripting Interpreter: JavaScript
Suspicious use of SetThreadContext
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:
0.98
Link:
https://yomi.yoroi.company/submissions/51379f4acb028f106dff9e97d2fffe91ef2ed5eb377dfdafbe87b14d4f64044e

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: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