MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 2838ec99d9fbbfbf09041c422f94fbc5b6a3dea2ffa77b5529966cd7b60df845. 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 17 File information Comments
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SHA256 hash: 2838ec99d9fbbfbf09041c422f94fbc5b6a3dea2ffa77b5529966cd7b60df845
SHA3-384 hash: f812bac497eee865d93e885e42ffbdaa9fea530ddaf3ec11f10ca75e5c23f6f9704ac7181a7439c6a5ce602deb474f5c
SHA1 hash: 06b92bf3eee5dbe68d6a10419b4cf3644d632e98
MD5 hash: cd9e704065b0f2fb0413e22aa2d8f611
humanhash: five-summer-carbon-alanine
File name:21crypted.ps1
Download: download sample
Signature Formbook
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File size:2'273'304 bytes
First seen:2026-08-19 18:28:07 UTC
Last seen:Never
File type:PowerShell (PS) ps1
MIME type:text/plain
ssdeep 24576:4/BsYvapxt4P3zmBOIavwlcr2UKJiqRahWKDlNPDJAlpVoj4eqvg9lBGmp:g
TLSH T132B595FF044C61B2936BE203C58712AD5E652669CC83E6411024AFDD09237BABFD6FD6
Magika powershell
Reporter abuse_ch
Tags:FormBook ps1

Intelligence

File Origin
# of uploads :
1
# of downloads :
67
Origin country :
SE SE
Vendor Threat Intelligence
No detections
Detection(s):
SecuriteInfo.com.Other.Malware-gen.32284315.UNOFFICIAL
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Verdict:
Malicious
Threat level:
  10/10
Confidence:
100%
Tags:
aspnet_compiler base64 base64 encrypted evasive lolbin obfuscated reconnaissance
Link:
https://www.filescan.io/uploads/6a85f5c9092a5028173249dc/reports/01b752d1-a31e-4234-b3a5-bb0aa1f69fe4/overview
Verdict:
Malicious
Labled as:
PowerShell/Agent.EZS trojan
Link:
https://www.hybrid-analysis.com/sample/2838ec99d9fbbfbf09041c422f94fbc5b6a3dea2ffa77b5529966cd7b60df845
Result
Threat name:
FormBook
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Detection:
malicious
Classification:
troj.spyw.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1960690
Signature
.NET source code contains method to dynamically call methods (often used by packers)
Found direct / indirect Syscall (likely to bypass EDR)
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
Queues an APC in another process (thread injection)
Suricata IDS alerts for network traffic
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)
Writes to foreign memory regions
Yara detected FormBook
Yara detected Powershell decode and execute
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 1960690 Sample: 21crypted.ps1 Startdate: 19/08/2026 Architecture: WINDOWS Score: 100 36 www.kolkatacircle.in 2->36 38 www.cydevv.com 2->38 40 17 other IPs or domains 2->40 48 Suricata IDS alerts for network traffic 2->48 50 Malicious sample detected (through community Yara rule) 2->50 52 Multi AV Scanner detection for submitted file 2->52 54 5 other signatures 2->54 10 powershell.exe 19 2->10         started        signatures3 process4 signatures5 56 Writes to foreign memory regions 10->56 58 Injects a PE file into a foreign processes 10->58 13 aspnet_compiler.exe 10->13         started        16 aspnet_compiler.exe 10->16         started        18 aspnet_compiler.exe 10->18         started        20 26 other processes 10->20 process6 signatures7 60 Modifies the context of a thread in another process (thread injection) 13->60 62 Maps a DLL or memory area into another process 13->62 64 Queues an APC in another process (thread injection) 13->64 22 KaR47B2Ku.exe 13->22 injected 66 Found direct / indirect Syscall (likely to bypass EDR) 16->66 24 xAfVJ9bs1X.exe 16->24 injected 68 Unusual module load detection (module proxying) 18->68 70 Switches to a custom stack to bypass stack traces 18->70 27 conhost.exe 20->27         started        process8 dnsIp9 29 proquota.exe 13 22->29         started        42 www.cydevv.com 95.216.88.152, 49749, 49750, 49751 HETZNER-ASDE Finland 24->42 44 www.kolkatacircle.in 172.67.218.168, 49770, 49771, 49772 CLOUDFLARENET-CloudflareIncUS Canada 24->44 46 10 other IPs or domains 24->46 32 proquota.exe 24->32         started        process10 signatures11 72 Tries to steal Mail credentials (via file / registry access) 29->72 74 Tries to harvest and steal browser information (history, passwords, etc) 29->74 76 Modifies the context of a thread in another process (thread injection) 29->76 78 3 other signatures 29->78 34 firefox.exe 29->34         started        process12
Score:
79%
Verdict:
Malware
File Type:
SCRIPT
Link:
https://malprob.io/report/2838ec99d9fbbfbf09041c422f94fbc5b6a3dea2ffa77b5529966cd7b60df845
Gathering data
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/2838ec99d9fbbfbf09041c422f94fbc5b6a3dea2ffa77b5529966cd7b60df845/
Threat name:
Script-PowerShell.Trojan.InjectorNetT
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Status:
Malicious
First seen:
2026-08-19 12:08:14 UTC
File Type:
Text (PowerShell)
AV detection:
13 of 38 (34.21%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=fa4ozgoz7o736ciedrbc7fh3yw3khxvc76txwvjjszwnpnqn7bcq._file
Verdict:
malicious
Label(s):
Formbook
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Link:
https://reports.threatray.com/79bbeb51-2779-4ba1-8154-10d3b96009eb
Result
Malware family:
formbook
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Score:
  10/10
Tags:
family:formbook adware collection discovery execution rat spyware stealer trojan
Link:
https://tria.ge/reports/260819-w4jlpsfq3v/
Behaviour
Modifies Internet Explorer settings
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: MapViewOfSection
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
outlook_office_path
Command and Scripting Interpreter: PowerShell
System Location Discovery: System Language Discovery
Suspicious use of SetThreadContext
Accesses Microsoft Outlook profiles
Badlisted process makes network request
Family: Formbook
Formbook payload
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/2838ec99d9fbbfbf09041c422f94fbc5b6a3dea2ffa77b5529966cd7b60df845

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
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Author:DiegoAnalytics
Description:Detects attempts to inject code into another process across PE, ELF, Mach-O binaries
Rule name:DebuggerCheck__GlobalFlags
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Reference:https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara
Rule name:DebuggerCheck__QueryInfo
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Reference:https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara
Rule name:DebuggerHiding__Active
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Reference:https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara
Rule name:DebuggerHiding__Thread
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Reference:https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara
Rule name:DetectEncryptedVariants
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Author:Zinyth
Description:Detects 'encrypted' in ASCII, Unicode, base64, or hex-encoded
Rule name:dgaagas
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Author:Harshit
Description:Uses certutil.exe to download a file named test.txt
Rule name:golang_bin_JCorn_CSC846
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Author:Justin Cornwell
Description:CSC-846 Golang detection ruleset
Rule name:MD5_Constants
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Author:phoul (@phoul)
Description:Look for MD5 constants
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:RIPEMD160_Constants
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Author:phoul (@phoul)
Description:Look for RIPEMD-160 constants
Rule name:SEH__vectored
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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: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)
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.

Web download

Formbook

PowerShell (PS) ps1 2838ec99d9fbbfbf09041c422f94fbc5b6a3dea2ffa77b5529966cd7b60df845

(this sample)

  
URLhaus
https://urlhaus.abuse.ch/url/3905602/
  
Delivery method
Distributed via web download

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