MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 fcb005ac3f9585d11dd8b7d8ad91f1b67f8dafdd9f8bb977b4e9e3dbd42205a5. 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: 8


Intelligence 8 IOCs YARA 15 File information Comments
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SHA256 hash: fcb005ac3f9585d11dd8b7d8ad91f1b67f8dafdd9f8bb977b4e9e3dbd42205a5
SHA3-384 hash: a02e32e0e1d2838e4b6f847c97d2e504224b724816a76190d1fedcbbc430a66e50dd8ab4f3154e6fce068eb6b5c204be
SHA1 hash: 485ac05113b0e1268d5ca5765f54283e838b2605
MD5 hash: fd641474a7e7d35bdfc580aab70b06a9
humanhash: bulldog-speaker-harry-diet
File name:rcius mop110136722-0810.js
Download: download sample
Signature Formbook
Create hunting rule
File size:3'133'015 bytes
First seen:2026-08-11 08:58:43 UTC
Last seen:Never
File type:Java Script (JS) js
MIME type:text/plain
ssdeep 12288:JlXOIB0fN9iANrcingwhS17CkkpJVaktBBmFNx5p/1e7RsYbkkqgiUmq5KzAvpgO:L+IUNdNrWROCJG
TLSH T1FFE5B7613AEF2709E51D771D80890E4FAF9FC510A143A5ED70DF07C50A0B89B7AA61AF
Magika javascript
Reporter abuse_ch
Tags:FormBook js

Intelligence

File Origin
# of uploads :
1
# of downloads :
141
Origin country :
SE SE
Vendor Threat Intelligence
No detections
Verdict:
Suspicious
Threat level:
  5/10
Confidence:
100%
Tags:
obfuscated repaired
Link:
https://www.filescan.io/uploads/6a7ae4cb051c0f401a8ad457/reports/d7bd66f3-91fd-4d21-931c-754dd43e3475/overview
Verdict:
Malicious
Labled as:
Trojan/JS.Obfuscated
Link:
https://www.hybrid-analysis.com/sample/fcb005ac3f9585d11dd8b7d8ad91f1b67f8dafdd9f8bb977b4e9e3dbd42205a5
Verdict:
Malicious
File Type:
js
First seen:
2026-08-11T04:06:00Z UTC
Last seen:
2026-08-12T07:06:00Z UTC
Hits:
~10000
Link:
https://opentip.kaspersky.com/fcb005ac3f9585d11dd8b7d8ad91f1b67f8dafdd9f8bb977b4e9e3dbd42205a5/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/1955794
Signature
Binary is likely a compiled AutoIt script file
Bypasses PowerShell execution policy
Creates autostart registry keys with suspicious values (likely registry only malware)
Found direct / indirect Syscall (likely to bypass EDR)
Found suspicious powershell code related to unpacking or dynamic code loading
Injects a PE file into a foreign processes
JavaScript file contains suspicious strings
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: New RUN Key Pointing to Suspicious Folder
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
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 1955794 Sample: rcius mop110136722-0810.js Startdate: 11/08/2026 Architecture: WINDOWS Score: 100 60 www.thereedlegacygroup.com 2->60 62 www.stanbicfinanceug.com 2->62 64 5 other IPs or domains 2->64 78 Suricata IDS alerts for network traffic 2->78 80 Malicious sample detected (through community Yara rule) 2->80 82 Multi AV Scanner detection for submitted file 2->82 84 8 other signatures 2->84 11 wscript.exe 2 4 2->11         started        14 powershell.exe 19 2->14         started        16 powershell.exe 2->16         started        18 powershell.exe 17 2->18         started        signatures3 process4 signatures5 114 Suspicious powershell command line found 11->114 116 Wscript starts Powershell (via cmd or directly) 11->116 118 Creates autostart registry keys with suspicious values (likely registry only malware) 11->118 124 3 other signatures 11->124 20 powershell.exe 16 11->20         started        120 Writes to foreign memory regions 14->120 122 Injects a PE file into a foreign processes 14->122 23 conhost.exe 14->23         started        25 aspnet_compiler.exe 14->25         started        27 aspnet_compiler.exe 14->27         started        35 4 other processes 14->35 29 conhost.exe 16->29         started        31 aspnet_compiler.exe 16->31         started        37 4 other processes 16->37 33 conhost.exe 1 18->33         started        process6 signatures7 94 Writes to foreign memory regions 20->94 96 Found suspicious powershell code related to unpacking or dynamic code loading 20->96 98 Injects a PE file into a foreign processes 20->98 39 aspnet_compiler.exe 20->39         started        42 aspnet_compiler.exe 20->42         started        44 conhost.exe 20->44         started        46 5 other processes 20->46 process8 signatures9 100 Modifies the context of a thread in another process (thread injection) 39->100 102 Maps a DLL or memory area into another process 39->102 104 Queues an APC in another process (thread injection) 39->104 106 Found direct / indirect Syscall (likely to bypass EDR) 39->106 48 3XfFUmPkvxJWSh.exe 39->48 injected 108 Unusual module load detection (module proxying) 42->108 110 Switches to a custom stack to bypass stack traces 42->110 process10 signatures11 72 Binary is likely a compiled AutoIt script file 48->72 74 Maps a DLL or memory area into another process 48->74 76 Found direct / indirect Syscall (likely to bypass EDR) 48->76 51 rekeywiz.exe 13 48->51         started        process12 signatures13 86 Tries to steal Mail credentials (via file / registry access) 51->86 88 Tries to harvest and steal browser information (history, passwords, etc) 51->88 90 Modifies the context of a thread in another process (thread injection) 51->90 92 3 other signatures 51->92 54 vPqg3IXNztc.exe 51->54 injected 58 firefox.exe 51->58         started        process14 dnsIp15 66 stanbicfinanceug.com 91.234.194.113, 49710, 49711, 49712 LWSFR France 54->66 68 www.hlushkova.top 2.58.67.83, 49709, 80 FORNEX-ASES Germany 54->68 70 2 other IPs or domains 54->70 112 Binary is likely a compiled AutoIt script file 54->112 signatures16
Score:
99%
Verdict:
Malware
File Type:
SCRIPT
Link:
https://malprob.io/report/fcb005ac3f9585d11dd8b7d8ad91f1b67f8dafdd9f8bb977b4e9e3dbd42205a5
Gathering data
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/fcb005ac3f9585d11dd8b7d8ad91f1b67f8dafdd9f8bb977b4e9e3dbd42205a5/
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=7syallb7swc5choyw7mk3eprwz7y3l65t6f3s55u5hr5xvbcawsq._file
Result
Malware family:
formbook
Create hunting rule
Score:
  10/10
Tags:
family:formbook adware collection discovery execution persistence privilege_escalation rat spyware stealer trojan
Link:
https://tria.ge/reports/260811-kx75yabk9s/
Behaviour
Modifies Internet Explorer settings
Modifies registry class
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: MapViewOfSection
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
outlook_office_path
Command and Scripting Interpreter: JavaScript
Enumerates physical storage devices
System Location Discovery: System Language Discovery
ConfuserEx .NET packer
Suspicious use of SetThreadContext
Accesses Microsoft Outlook profiles
Adds Run key to start application
Creates a file in the Startup directory
Badlisted process makes network request
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.

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_Script_Inject_Detector
Create hunting rule
Author:DiegoAnalytics
Description:Detects attempts to inject code into another process across PE, ELF, Mach-O binaries
Rule name:DebuggerCheck__GlobalFlags
Create hunting rule
Reference:https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara
Rule name:DebuggerCheck__QueryInfo
Create hunting rule
Reference:https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara
Rule name:DebuggerHiding__Active
Create hunting rule
Reference:https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara
Rule name:DebuggerHiding__Thread
Create hunting rule
Reference:https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara
Rule name:DetectEncryptedVariants
Create hunting rule
Author:Zinyth
Description:Detects 'encrypted' in ASCII, Unicode, base64, or hex-encoded
Rule name:dgaagas
Create hunting rule
Author:Harshit
Description:Uses certutil.exe to download a file named test.txt
Rule name:golang_bin_JCorn_CSC846
Create hunting rule
Author:Justin Cornwell
Description:CSC-846 Golang detection ruleset
Rule name:MD5_Constants
Create hunting rule
Author:phoul (@phoul)
Description:Look for MD5 constants
Rule name:pe_no_import_table
Create hunting rule
Description:Detect pe file that no import table
Rule name:RIPEMD160_Constants
Create hunting rule
Author:phoul (@phoul)
Description:Look for RIPEMD-160 constants
Rule name:SEH__vectored
Create hunting rule
Reference:https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara
Rule name:SHA1_Constants
Create hunting rule
Author:phoul (@phoul)
Description:Look for SHA1 constants
Rule name:shellcode
Create hunting rule
Author:nex
Description:Matched shellcode byte patterns
Rule name:TH_Win_ETW_Bypass_2025_CYFARE
Create hunting rule
Author:CYFARE
Description:Windows ETW Bypass Detection Rule - 2025
Reference:https://cyfare.net/

File information

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

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