MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 ca4a2cb8318f38fc80d893a39cf9484eb1d9080ce43277e85ea6d1e69f7674d5. 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: 9


Intelligence 9 IOCs YARA 5 File information Comments
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SHA256 hash: ca4a2cb8318f38fc80d893a39cf9484eb1d9080ce43277e85ea6d1e69f7674d5
SHA3-384 hash: ba6174aeb9bce20844edadf12d7a8b59a8ddf6226beca5f9af9b22ca5ae09da9031c07bef0dbf7dfd93a7e932c15b476
SHA1 hash: c04ccbf085e5c39060d90a419fee1f9f798be18d
MD5 hash: 483c733f5d2987ae6e8cd641386cb804
humanhash: jupiter-asparagus-charlie-may
File name:rGuardianPO4-39422-0525ENCOMPASS.vbs
Download: download sample
Signature Formbook
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File size:41'249 bytes
First seen:2025-06-13 04:01:15 UTC
Last seen:Never
File type:Visual Basic Script (vbs) vbs
MIME type:text/plain
ssdeep 768:JRMKsVqGPuCZCYJ1ncW3CDAsqKXDNKJRaY++PrWWe5/k:JWl1n/y+TWWe5/k
Threatray 1 similar samples on MalwareBazaar
TLSH T1C9031AB735B8679328D529E0D9805021CEF8961C37F84AE1DB256C96482D9C33AE73DF
Magika vba
Reporter FXOLabs
Tags:FormBook vbs

Intelligence

File Origin
# of uploads :
1
# of downloads :
99
Origin country :
BR BR
Vendor Threat Intelligence
Detection:
n/a
Link:
https://www.capesandbox.com/analysis/9234/
Detection(s):
SecuriteInfo.com.Script.SNH-gen.31705.11172.UNOFFICIAL
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Verdict:
Malicious
Score:
92.5%
Link:
https://cyber-fortress.com/docs/result/index.php?id=684ba2a407b5e8c1cfe6a025
Tags:
trojan shell spawn
Verdict:
Malicious
Threat level:
  10/10
Confidence:
100%
Tags:
base64 dropper evasive obfuscated obfuscated opendir opendir powershell
Link:
https://www.filescan.io/uploads/684ba29afd02ed5e05a7e506/reports/fa8bf3d8-f3bb-4a1b-800d-5ed9d95255b9/overview
Verdict:
Malicious
Labled as:
VBS/TrojanDownloader.Agent
Link:
https://www.hybrid-analysis.com/sample/ca4a2cb8318f38fc80d893a39cf9484eb1d9080ce43277e85ea6d1e69f7674d5
Result
Threat name:
FormBook
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Detection:
malicious
Classification:
troj.spyw.expl.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1713774
Signature
.NET source code contains method to dynamically call methods (often used by packers)
.NET source code references suspicious native API functions
AI detected malicious Powershell script
Allocates memory in foreign processes
Bypasses PowerShell execution policy
Found suspicious powershell code related to unpacking or dynamic code loading
Injects a PE file into a foreign processes
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 dropped file
Multi AV Scanner detection for submitted file
Performs DNS queries to domains with low reputation
Powershell drops PE file
Queues an APC in another process (thread injection)
Sigma detected: Suspicious PowerShell Parameter Substring
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
System process connects to network (likely due to code injection or exploit)
Tries to harvest and steal browser information (history, passwords, etc)
Tries to steal Mail credentials (via file / registry access)
VBScript performs obfuscated calls to suspicious functions
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: 1713774 Sample: rGuardianPO4-39422-0525ENCO... Startdate: 13/06/2025 Architecture: WINDOWS Score: 100 51 www.mj222.xyz 2->51 53 www.1candi88.xyz 2->53 55 5 other IPs or domains 2->55 73 Suricata IDS alerts for network traffic 2->73 75 Malicious sample detected (through community Yara rule) 2->75 77 Multi AV Scanner detection for submitted file 2->77 81 8 other signatures 2->81 13 wscript.exe 16 2->13         started        signatures3 79 Performs DNS queries to domains with low reputation 53->79 process4 dnsIp5 63 172.245.123.11, 49692, 49693, 80 AS-COLOCROSSINGUS United States 13->63 47 C:\Users\user\AppData\Local\...\la[1].ps1, ASCII 13->47 dropped 49 C:\Temp\HMOAIFGJ.ps1, ASCII 13->49 dropped 101 System process connects to network (likely due to code injection or exploit) 13->101 103 VBScript performs obfuscated calls to suspicious functions 13->103 105 Wscript starts Powershell (via cmd or directly) 13->105 107 3 other signatures 13->107 18 powershell.exe 17 13->18         started        file6 signatures7 process8 file9 45 C:\Users\user\AppData\Local\...\zlccKFUg.exe, PE32 18->45 dropped 83 Suspicious execution chain found 18->83 85 Found suspicious powershell code related to unpacking or dynamic code loading 18->85 87 Powershell drops PE file 18->87 22 zlccKFUg.exe 15 3 18->22         started        25 conhost.exe 18->25         started        signatures10 process11 signatures12 89 Multi AV Scanner detection for dropped file 22->89 91 Writes to foreign memory regions 22->91 93 Allocates memory in foreign processes 22->93 95 Injects a PE file into a foreign processes 22->95 27 RegAsm.exe 22->27         started        process13 signatures14 97 Maps a DLL or memory area into another process 27->97 30 t1ch4jEA2NRX1.exe 27->30 injected process15 signatures16 99 Maps a DLL or memory area into another process 30->99 33 SecEdit.exe 13 30->33         started        process17 signatures18 65 Tries to steal Mail credentials (via file / registry access) 33->65 67 Tries to harvest and steal browser information (history, passwords, etc) 33->67 69 Modifies the context of a thread in another process (thread injection) 33->69 71 3 other signatures 33->71 36 nzV8sqpbGZ.exe 33->36 injected 39 chrome.exe 33->39         started        41 firefox.exe 33->41         started        process19 dnsIp20 57 www.mj222.xyz 103.21.220.227, 49702, 49703, 49704 LINKNET-ID-APLinknetASNID unknown 36->57 59 www.reims.delivery 199.59.243.228, 49698, 49699, 49700 BODIS-NJUS United States 36->59 61 2 other IPs or domains 36->61 43 WerFault.exe 4 39->43         started        process21
Score:
16%
Verdict:
Benign
File Type:
SCRIPT
Link:
https://malprob.io/report/ca4a2cb8318f38fc80d893a39cf9484eb1d9080ce43277e85ea6d1e69f7674d5
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/ca4a2cb8318f38fc80d893a39cf9484eb1d9080ce43277e85ea6d1e69f7674d5/
Threat name:
Script-WScript.Downloader.Nemucod
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Status:
Malicious
First seen:
2025-06-13 03:56:34 UTC
File Type:
Text (VBS)
AV detection:
11 of 24 (45.83%)
Threat level:
  3/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=zjfczobrr44pzagysorzz6kij2y5scam4qzhp2c6u3i6nh3wotkq._file
Verdict:
malicious
Label(s):
formbook
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fantomcrypt
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Similar samples:
2e64ed10f0c61a872dbc4cc8ac023e947db0c9642044dbe33af671cff97135a0
Formbook
error
Formbook
Result
Malware family:
n/a
Score:
  8/10
Tags:
discovery execution
Link:
https://tria.ge/reports/250613-elfzesfn5z/
Behaviour
Suspicious behavior: EnumeratesProcesses
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
Command and Scripting Interpreter: PowerShell
Enumerates physical storage devices
System Location Discovery: System Language Discovery
Suspicious use of SetThreadContext
Checks computer location settings
Executes dropped EXE
Blocklisted process makes network request
Downloads MZ/PE file
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/ca4a2cb8318f38fc80d893a39cf9484eb1d9080ce43277e85ea6d1e69f7674d5

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:OBFUS_PowerShell_Common_Replace
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Author:SECUINFRA Falcon Team
Description:Detects the common usage of replace for obfuscation
Rule name:pe_no_import_table
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Description:Detect pe file that no import table
Rule name:RANSOMWARE
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Author:ToroGuitar
Rule name:shellcode
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Author:nex
Description:Matched shellcode byte patterns
Rule name:Sus_Obf_Enc_Spoof_Hide_PE
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Author:XiAnzheng
Description:Check for Overlay, Obfuscating, Encrypting, Spoofing, Hiding, or Entropy Technique(can create FP)

File information

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

Malspam

Formbook

Visual Basic Script (vbs) vbs ca4a2cb8318f38fc80d893a39cf9484eb1d9080ce43277e85ea6d1e69f7674d5

(this sample)

  
Delivery method
Distributed via e-mail attachment
Cape
Cape
https://www.capesandbox.com/analysis/9234/

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