MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 990f4fd84ce32890f866a99e5bea2a2d7f0aa64c40aacc28a4c359bff3dff636. 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 18 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 990f4fd84ce32890f866a99e5bea2a2d7f0aa64c40aacc28a4c359bff3dff636
SHA3-384 hash: a0321a2bf3a82bb11628731cf7975150d30f9addeffde8c39d6c9e0596b50e5d26b7268904764a8c03a55999fb637f20
SHA1 hash: 8a9d4a708845e4ae79fe1656b848ea784ddc38ee
MD5 hash: 1e370ec4a8e47f075d7cce83cfe24449
humanhash: black-carbon-monkey-july
File name:357u7r.ps1
Download: download sample
Signature Formbook
Create hunting rule
File size:1'418'867 bytes
First seen:2026-01-15 09:04:57 UTC
Last seen:Never
File type:PowerShell (PS) ps1
MIME type:text/plain
ssdeep 24576:H5G6rTJxSSLDFAOMZcX6/MOiEPlf34KVIJ/gLIJdSMszSpgTijGGZe3Pq:HjJwSLW/DezIgfuS
Threatray 2'545 similar samples on MalwareBazaar
TLSH T10F653320BF6F38B805641374702BEAA99DC65EA3D88CAD5B7BEC01D13B1ABD54807D5C
Magika powershell
Reporter abuse_ch
Tags:FormBook ps1

Intelligence

File Origin
# of uploads :
1
# of downloads :
49
Origin country :
SE SE
Vendor Threat Intelligence
No detections
Verdict:
Malicious
Score:
70%
Link:
https://cyber-fortress.com/docs/result/index.php?id=6968adf2ef906a21abcd7115
Tags:
ransomware
Verdict:
Likely Malicious
Threat level:
  7.5/10
Confidence:
100%
Tags:
aspnet_compiler base64 evasive lolbin obfuscated obfuscated reconnaissance
Link:
https://www.filescan.io/uploads/6968ade014b4fa2f67d43372/reports/0c30d490-5221-49db-b63e-a5dbbdb1b7f2/overview
Verdict:
Unknown
Link:
https://www.hybrid-analysis.com/sample/990f4fd84ce32890f866a99e5bea2a2d7f0aa64c40aacc28a4c359bff3dff636
Result
Gathering data
Verdict:
Unknown
File Type:
Link:
https://opentip.kaspersky.com/990f4fd84ce32890f866a99e5bea2a2d7f0aa64c40aacc28a4c359bff3dff636/results?tab=lookup
Result
Threat name:
FormBook
Create hunting rule
Detection:
malicious
Classification:
troj.spyw.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1851203
Signature
AI detected malicious Powershell script
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)
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: 1851203 Sample: 357u7r.ps1 Startdate: 15/01/2026 Architecture: WINDOWS Score: 100 37 www.viptaka.cloud 2->37 39 www.unitedsharesbank.com 2->39 41 7 other IPs or domains 2->41 49 Suricata IDS alerts for network traffic 2->49 51 Malicious sample detected (through community Yara rule) 2->51 53 Yara detected FormBook 2->53 55 4 other signatures 2->55 11 powershell.exe 22 2->11         started        signatures3 process4 signatures5 65 Writes to foreign memory regions 11->65 67 Injects a PE file into a foreign processes 11->67 14 aspnet_compiler.exe 11->14         started        17 conhost.exe 11->17         started        19 aspnet_compiler.exe 11->19         started        21 23 other processes 11->21 process6 signatures7 69 Maps a DLL or memory area into another process 14->69 71 Unusual module load detection (module proxying) 14->71 23 Jiw4nhGqtlPakz.exe 14->23 injected process8 process9 25 unlodctr.exe 13 23->25         started        signatures10 57 Tries to steal Mail credentials (via file / registry access) 25->57 59 Tries to harvest and steal browser information (history, passwords, etc) 25->59 61 Modifies the context of a thread in another process (thread injection) 25->61 63 4 other signatures 25->63 28 cs3ORltS.exe 25->28 injected 31 chrome.exe 25->31         started        33 firefox.exe 25->33         started        process11 dnsIp12 43 www.spdoman.site 162.210.101.174, 49739, 49740, 49741 STEADFASTUS United States 28->43 45 www.unitedsharesbank.com 198.251.89.229, 49721, 80 PONYNETUS United States 28->45 47 4 other IPs or domains 28->47 35 WerFault.exe 4 31->35         started        process13
Score:
98%
Verdict:
Malware
File Type:
SCRIPT
Link:
https://malprob.io/report/990f4fd84ce32890f866a99e5bea2a2d7f0aa64c40aacc28a4c359bff3dff636
Gathering data
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/990f4fd84ce32890f866a99e5bea2a2d7f0aa64c40aacc28a4c359bff3dff636/
Verdict:
Malicious
Threat:
Family.FORMBOOK
Link:
https://tip.neiki.dev/file/990f4fd84ce32890f866a99e5bea2a2d7f0aa64c40aacc28a4c359bff3dff636
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=tehu7wcm4mujb6dgvgpfx2rkfv7qvjsmicvmykfeynm374676y3a._file
Verdict:
malicious
Label(s):
formbook
Create hunting rule
Similar samples:
3671a3f885f39f3793f4c88e8a54005b466e1e9b20f2a91d069cea42e25703b3
Formbook
3a279099e6b83675a0f1b4ad779734a1c718d6b19a9ab225c54be70c78108ab5
Formbook
3cfece15de5fb0b83d7474185dc8860f39cdd123c05f2546ada90a2f94f355ef
Formbook
4f6f49d76b427ecd1df55d94a028a143e1f3795c938c0612ec546775395fb130
Formbook
5756e25b85cd80cc50822ff08493723729b4f99d37d2a0e26a4a0fa244c7db15
Formbook
77be2ee5c55a9c5f20b6522fb6fbd174465481ad60b5143c95ee31e16fccaf8e
Formbook
8c07a168b11c30dffb306605a02039ca58803c7fb511127f673d29f84d57bd37
Formbook
95d02b5db5c6ada40a762a79710a042e3fdcef9d8ea2c47e5e81e575a55d57a6
Formbook
b06f763db65124fc25523c16d8850580af3769771440e6fc9cec856718740f15
Formbook
dc868203fe63fc8e75865fcfe43849fc1a4fd6a845416dee9497834b158669eb
Formbook
error
Formbook
+ 2'535 additional samples on MalwareBazaar
Result
Malware family:
formbook
Create hunting rule
Score:
  10/10
Tags:
family:formbook adware discovery execution rat spyware stealer trojan
Link:
https://tria.ge/reports/260115-k2hqvahy4g/
Behaviour
Modifies Internet Explorer settings
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: MapViewOfSection
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
Command and Scripting Interpreter: PowerShell
System Location Discovery: System Language Discovery
Suspicious use of SetThreadContext
Badlisted process makes network request
Formbook payload
Formbook
Formbook family
Malware family:
FormBook
Create hunting rule
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/990f4fd84ce3/report/overview.html
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/990f4fd84ce32890f866a99e5bea2a2d7f0aa64c40aacc28a4c359bff3dff636

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:detect_powershell
Create hunting rule
Author:daniyyell
Description:Detects suspicious PowerShell activity related to malware execution
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:RANSOMWARE
Create hunting rule
Author:ToroGuitar
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: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 990f4fd84ce32890f866a99e5bea2a2d7f0aa64c40aacc28a4c359bff3dff636

(this sample)

  
URLhaus
https://urlhaus.abuse.ch/url/3758309/
  
Delivery method
Distributed via web download

Comments