MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 28540d83a30a6745996f1bce50f4b3b4921591b9933d3fa9ef449239247ed62b. 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: 11


Intelligence 11 IOCs YARA 2 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 28540d83a30a6745996f1bce50f4b3b4921591b9933d3fa9ef449239247ed62b
SHA3-384 hash: fa2e231f887d6a588ec75d9ab49fff791244e13048ba8edb14f591dfbfc5a556812dbb50df7e845bcef10764a9b9ac76
SHA1 hash: d61181160ab6c5c1b890174f76b4a47154ecd7d6
MD5 hash: 9316b4a99f71fda049074e962ff79b5a
humanhash: lima-magnesium-nebraska-oregon
File name:RFQ Documents.vbs
Download: download sample
Signature Formbook
Create hunting rule
File size:16'703 bytes
First seen:2026-02-23 10:31:05 UTC
Last seen:Never
File type:Visual Basic Script (vbs) vbs
MIME type:text/plain
ssdeep 384:KYa/kucop3vxc4TjsADOKJWr8fOatIvGYSjERXgeTP66LrNa:KYi9cKcG3CBLrNa
Threatray 11 similar samples on MalwareBazaar
TLSH T1D772971A8905DFF00A2E3651B65B781AA5100367BD38394EBD8FD4AD3F7A610DFE01E9
Magika vba
Reporter abuse_ch
Tags:FormBook vbs

Intelligence

File Origin
# of uploads :
1
# of downloads :
84
Origin country :
SE SE
Vendor Threat Intelligence
No detections
Detection:
n/a
Link:
https://www.capesandbox.com/analysis/54196/
Detection(s):
TwinWave.EvilVBA.LostAtSeaFuncInDirection.20240306.UNOFFICIAL
Create hunting rule

Verdict:
Malicious
Score:
90.2%
Link:
https://cyber-fortress.com/docs/result/index.php?id=699c2c86c950ab5d9ab0becf
Tags:
xtreme shell sage
Verdict:
Malicious
Labled as:
PowerShell/TrojanDownloader.Agent
Link:
https://www.hybrid-analysis.com/sample/28540d83a30a6745996f1bce50f4b3b4921591b9933d3fa9ef449239247ed62b
Verdict:
Malicious
File Type:
vbs
Detections:
Trojan-Downloader.PowerShell.NanoShield.sb Trojan.JS.SAgent.sb HEUR:Trojan-Downloader.Script.Generic HEUR:Trojan.Script.Generic PDM:Trojan.Win32.Generic
Link:
https://opentip.kaspersky.com/28540d83a30a6745996f1bce50f4b3b4921591b9933d3fa9ef449239247ed62b/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/1873385
Signature
.NET source code contains potential unpacker
Antivirus detection for URL or domain
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 submitted file
Performs DNS queries to domains with low reputation
Queues an APC in another process (thread injection)
Sample has a suspicious name (potential lure to open the executable)
Sample uses process hollowing technique
Sigma detected: Base64 Encoded PowerShell Command Detected
Sigma detected: Dot net compiler compiles file from suspicious location
Sigma detected: Net WebClient Casing Anomalies
Sigma detected: PowerShell Base64 Encoded FromBase64String Cmdlet
Sigma detected: PowerShell Base64 Encoded IEX Cmdlet
Sigma detected: WScript or CScript Dropper
Suricata IDS alerts for network traffic
Suspicious execution chain found
Suspicious powershell command line found
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)
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 reads language and country specific registry keys (likely country aware script)
Wscript starts Powershell (via cmd or directly)
Yara detected FormBook
Yara detected MSIL Injector
Yara detected Powershell download and execute
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 1873385 Sample: RFQ Documents.vbs Startdate: 23/02/2026 Architecture: WINDOWS Score: 100 58 www.54825091.xyz 2->58 60 shahamanatme.com 2->60 62 9 other IPs or domains 2->62 78 Suricata IDS alerts for network traffic 2->78 80 Malicious sample detected (through community Yara rule) 2->80 82 Antivirus detection for URL or domain 2->82 86 14 other signatures 2->86 12 wscript.exe 1 2->12         started        15 svchost.exe 1 1 2->15         started        signatures3 84 Performs DNS queries to domains with low reputation 58->84 process4 dnsIp5 108 VBScript performs obfuscated calls to suspicious functions 12->108 110 Suspicious powershell command line found 12->110 112 Wscript starts Powershell (via cmd or directly) 12->112 114 3 other signatures 12->114 18 powershell.exe 14 23 12->18         started        74 127.0.0.1 unknown unknown 15->74 signatures6 process7 dnsIp8 64 shahamanatme.com 204.197.172.34, 443, 49688 WEBNETUS Reserved 18->64 66 au72nuxzv2.ufs.sh 172.67.184.177, 443, 49687 CLOUDFLARENETUS United States 18->66 54 C:\Users\user\AppData\...\gei4432a.cmdline, Unicode 18->54 dropped 88 Writes to foreign memory regions 18->88 90 Suspicious execution chain found 18->90 92 Sample uses process hollowing technique 18->92 94 Injects a PE file into a foreign processes 18->94 23 RegAsm.exe 18->23         started        26 RegAsm.exe 18->26         started        28 csc.exe 3 18->28         started        31 4 other processes 18->31 file9 signatures10 process11 file12 96 Maps a DLL or memory area into another process 23->96 33 fZrgTIrYAln.exe 23->33 injected 98 Unusual module load detection (module proxying) 26->98 56 C:\Users\user\AppData\Local\...\gei4432a.dll, PE32 28->56 dropped 36 cvtres.exe 1 28->36         started        38 conhost.exe 31->38         started        40 conhost.exe 31->40         started        signatures13 process14 signatures15 76 Maps a DLL or memory area into another process 33->76 42 msdt.exe 13 33->42         started        process16 signatures17 100 Tries to steal Mail credentials (via file / registry access) 42->100 102 Tries to harvest and steal browser information (history, passwords, etc) 42->102 104 Modifies the context of a thread in another process (thread injection) 42->104 106 2 other signatures 42->106 45 IiFqtxDc.exe 42->45 injected 48 chrome.exe 42->48         started        50 firefox.exe 42->50         started        process18 dnsIp19 68 efplusarchitekci.com 109.234.165.161, 49700, 49701, 49702 O2SWITCHFR France 45->68 70 ghs.google.com 142.250.72.19, 49708, 49709, 49710 GOOGLEUS United States 45->70 72 4 other IPs or domains 45->72 52 WerFault.exe 4 48->52         started        process20
Score:
92%
Verdict:
Malware
File Type:
SCRIPT
Link:
https://malprob.io/report/28540d83a30a6745996f1bce50f4b3b4921591b9933d3fa9ef449239247ed62b
Verdict:
Malware
YARA:
1 match(es)
Tags:
DeObfuscated Obfuscated T1059.005 VBScript
Link:
https://app.malva.re/file/9316b4a99f71fda049074e962ff79b5a
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/28540d83a30a6745996f1bce50f4b3b4921591b9933d3fa9ef449239247ed62b/
Verdict:
Malicious
Threat:
Trojan-Downloader.PowerShell.NanoShield
Link:
https://tip.neiki.dev/file/28540d83a30a6745996f1bce50f4b3b4921591b9933d3fa9ef449239247ed62b
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=fbka3a5dbjtulglpdphfb5ftwsjblenzsm6t7kppisjdsjd62yvq._file
Verdict:
malicious
Label(s):
formbook
Create hunting rule
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Formbook
error
Formbook
+ 1 additional samples on MalwareBazaar
Result
Malware family:
n/a
Score:
  8/10
Tags:
defense_evasion discovery execution
Link:
https://tria.ge/reports/260223-mkl32sdy9h/
Behaviour
Kills process with taskkill
Suspicious behavior: EnumeratesProcesses
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
Enumerates physical storage devices
Program crash
System Location Discovery: System Language Discovery
Suspicious use of SetThreadContext
Command and Scripting Interpreter: PowerShell
Checks computer location settings
Badlisted process makes network request
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/28540d83a30a6745996f1bce50f4b3b4921591b9933d3fa9ef449239247ed62b

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_PS1_JAB_Pattern_Jun22_1
Create hunting rule
Author:Florian Roth (Nextron Systems)
Description:Detects suspicious UTF16 and Base64 encoded PowerShell code that starts with a $ sign and a single char variable
Reference:Internal Research
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.

Cape
Cape
https://www.capesandbox.com/analysis/54196/

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