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MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 873f978003b2aafd389abe461197a730223a5b3bf48e86145f8f76216550a507. 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 22 File information Comments
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SHA256 hash: 873f978003b2aafd389abe461197a730223a5b3bf48e86145f8f76216550a507
SHA3-384 hash: 570c772cc2dcf15ab139b2bf0558cc46042c44beb96c8088aff0968a40299b290632ff8f51b5fdd98ba5086e0b251d92
SHA1 hash: 13b350c4262646037244f2ce65746acdc2fe0794
MD5 hash: 708d61be734a6af77bdbdff7aceffb66
humanhash: floor-football-mockingbird-bacon
File name:873f978003b2aafd389abe461197a730223a5b3bf48e86145f8f76216550a507.bin
Download: download sample
Signature Formbook
Create hunting rule
File size:2'263'471 bytes
First seen:2026-10-02 00:54:06 UTC
Last seen:Never
File type:PowerShell (PS) ps1
MIME type:text/plain
ssdeep 24576:MGjcVyASSFO1saQTQp5Z0X40PyesEsRfSgmha78y8GuD9:k
TLSH T1B6A5848CF5B6EB462CA855BBB8534D598306BD15F1433CBC082FBEE1895339B164293E
Magika powershell
Reporter whack_sh
Tags:FormBook ps1

Intelligence

File Origin
# of uploads :
1
# of downloads :
25
Origin country :
US US
Vendor Threat Intelligence
No detections
Detection(s):
SecuriteInfo.com.Other.Malware-gen.73539199.UNOFFICIAL
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Verdict:
Likely Malicious
Threat level:
  7.5/10
Confidence:
100%
Tags:
aspnet_compiler base64 encrypted evasive lolbin masquerade obfuscated obfuscated reconnaissance
Link:
https://www.filescan.io/uploads/6abf62ee6b88be101a57d18b/reports/691f0b7d-ce5a-40c5-b5de-6fbb9ec5ed62/overview
Verdict:
Malicious
File Type:
ps1
First seen:
2026-09-15T02:43:00Z UTC
Last seen:
2026-10-02T09:43:00Z UTC
Hits:
~10
Link:
https://opentip.kaspersky.com/873f978003b2aafd389abe461197a730223a5b3bf48e86145f8f76216550a507/results?tab=lookup
Result
Threat name:
FormBook
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Detection:
malicious
Classification:
troj.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1981129
Signature
.NET source code contains potential unpacker
AI detected malicious Powershell script
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)
Multi AV Scanner detection for submitted file
Queues an APC in another process (thread injection)
Switches to a custom stack to bypass stack traces
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: 1981129 Sample: B5gXUa6sYc.ps1 Startdate: 02/10/2026 Architecture: WINDOWS Score: 100 30 www.papocabr.com 2->30 32 www.miralink.online 2->32 34 6 other IPs or domains 2->34 56 Multi AV Scanner detection for submitted file 2->56 58 Yara detected FormBook 2->58 60 Yara detected Powershell decode and execute 2->60 62 4 other signatures 2->62 7 powershell.exe 20 2->7         started        10 0cQEWvN1.exe 2->10 injected 12 om8Dzyehx.exe 2->12 injected 15 2 other processes 2->15 signatures3 process4 dnsIp5 64 Writes to foreign memory regions 7->64 66 Injects a PE file into a foreign processes 7->66 17 aspnet_compiler.exe 7->17         started        20 aspnet_compiler.exe 7->20         started        22 aspnet_compiler.exe 7->22         started        28 24 other processes 7->28 24 convert.exe 10->24         started        36 www.miralink.online 178.210.92.188, 49712, 49713, 49714 RU-CENTERRU Russia 12->36 38 www.celebratebeltane.co.uk 104.21.50.79, 49716, 49717, 49723 CLOUDFLARENET-CloudflareIncUS Canada 12->38 40 www.papocabr.com 172.67.165.46, 49711, 80 CLOUDFLARENET-CloudflareIncUS Canada 12->40 26 convert.exe 12->26         started        42 127.0.0.1 unknown unknown 15->42 signatures6 process7 signatures8 44 Modifies the context of a thread in another process (thread injection) 17->44 46 Maps a DLL or memory area into another process 17->46 48 Queues an APC in another process (thread injection) 17->48 50 Found direct / indirect Syscall (likely to bypass EDR) 20->50 52 Unusual module load detection (module proxying) 24->52 54 Switches to a custom stack to bypass stack traces 24->54
Score:
69%
Verdict:
Susipicious
File Type:
SCRIPT
Link:
https://malprob.io/report/873f978003b2aafd389abe461197a730223a5b3bf48e86145f8f76216550a507
Verdict:
inconclusive
YARA:
1 match(es)
Tags:
PowerShell T1059.001
Link:
https://app.malva.re/file/708d61be734a6af77bdbdff7aceffb66
Gathering data
Threat name:
Script-PowerShell.Backdoor.Remcos
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Status:
Malicious
First seen:
2026-09-15 05:31:31 UTC
File Type:
Text (PowerShell)
AV detection:
15 of 36 (41.67%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=q47zpaadwkvp2oe2xzdbdf5hgarduwz36shimfc7r53cczkquudq._file
Result
Malware family:
formbook
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Score:
  10/10
Tags:
family:formbook adware collection defense_evasion discovery execution privilege_escalation rat spyware stealer trojan
Link:
https://tria.ge/reports/261002-jq5kssxeqb/
Behaviour
Enumerates system info in registry
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
ConfuserEx .NET packer
Suspicious use of SetThreadContext
Accesses Microsoft Outlook profiles
Enumerates connected drives
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:
Legit
Score:
0.00
Link:
https://yomi.yoroi.company/submissions/873f978003b2aafd389abe461197a730223a5b3bf48e86145f8f76216550a507

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
Create hunting rule
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
Create hunting rule
Description:Detect pe file that no import table
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
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Author:phoul (@phoul)
Description:Look for SHA1 constants
Rule name:shellcode
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Author:nex
Description:Matched shellcode byte patterns
Rule name:Sus_CMD_Powershell_Usage
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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 873f978003b2aafd389abe461197a730223a5b3bf48e86145f8f76216550a507

(this sample)

  
Delivery method
Distributed via web download

Comments