MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 a3ee2f845200a4782510c67342e6f440ce804b9d724b33e0ddf9d3956d22f851. 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


RemcosRAT


Vendor detections: 12


Intelligence 12 IOCs YARA 22 File information Comments
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SHA256 hash: a3ee2f845200a4782510c67342e6f440ce804b9d724b33e0ddf9d3956d22f851
SHA3-384 hash: 6c4418f8051136970f5e06803bc65a450ffd6c48e9f2b3992ba186fe0c1325b4fa3439e23c71240dece70b700cf992bd
SHA1 hash: f4a99296bdb9162dcf8b751f11bda9afe7d276fb
MD5 hash: 0c7725a6c3b6b1c66bfff127323e9d2a
humanhash: item-mockingbird-king-mars
File name:output_1759123708.js
Download: download sample
Signature RemcosRAT
Create hunting rule
File size:5'240'654 bytes
First seen:2025-09-29 13:46:56 UTC
Last seen:Never
File type:Java Script (JS) js
MIME type:text/plain
ssdeep 12288:X1OM88KQImueTHXqEn5ei6V/FxSXCd2Ed6U7TnL7CgezqeHXJgPFGsqRWFN65beU:J
Threatray 1'545 similar samples on MalwareBazaar
TLSH T18436757CF6148968DDBDAF3944F0B8C7608C2B79841656F0AF46DCEFAD8940A507D2B2
Magika javascript
Reporter abuse_ch
Tags:js RAT RemcosRAT

Intelligence

File Origin
# of uploads :
1
# of downloads :
84
Origin country :
SE SE
Vendor Threat Intelligence
Verdict:
Malicious
Score:
92.5%
Link:
https://cyber-fortress.com/docs/result/index.php?id=68da8df740b7da0b4eb8b7c5
Tags:
obfuscate autorun xtreme shell
Verdict:
Unknown
Link:
https://www.hybrid-analysis.com/sample/a3ee2f845200a4782510c67342e6f440ce804b9d724b33e0ddf9d3956d22f851
Verdict:
Malicious
File Type:
js
First seen:
2025-09-29T03:52:00Z UTC
Last seen:
2025-09-29T03:52:00Z UTC
Hits:
~1000
Detections:
Trojan.PowerShell.AmsiBypass.sb Trojan.BAT.Agent.sb PDM:Trojan.Win32.Generic HEUR:Trojan.PowerShell.Tesre.sb HEUR:Trojan.BAT.Tesre.gen Trojan-Downloader.JS.Cryptoload.sb
Link:
https://opentip.kaspersky.com/a3ee2f845200a4782510c67342e6f440ce804b9d724b33e0ddf9d3956d22f851/results?tab=lookup
Result
Threat name:
Remcos
Create hunting rule
Detection:
malicious
Classification:
troj.spyw.expl.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1785893
Signature
.NET source code contains a sample name check
.NET source code references suspicious native API functions
C2 URLs / IPs found in malware configuration
Creates processes via WMI
Detected Remcos RAT
Drops script or batch files to the startup folder
Found malware configuration
Found suspicious powershell code related to unpacking or dynamic code loading
Installs a global keyboard hook
Joe Sandbox ML detected suspicious sample
Loading BitLocker PowerShell Module
Malicious sample detected (through community Yara rule)
Sigma detected: Base64 Encoded PowerShell Command Detected
Sigma detected: Drops script at startup location
Sigma detected: PowerShell Base64 Encoded FromBase64String Cmdlet
Sigma detected: PowerShell Base64 Encoded IEX Cmdlet
Sigma detected: Remcos
Sigma detected: WScript or CScript Dropper
Suricata IDS alerts for network traffic
Suspicious execution chain found
Suspicious powershell command line found
Uses dynamic DNS services
Windows Scripting host queries suspicious COM object (likely to drop second stage)
Wscript starts Powershell (via cmd or directly)
Yara detected Remcos RAT
Yara detected UAC Bypass using CMSTP
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 1785893 Sample: output_1759123708.js Startdate: 29/09/2025 Architecture: WINDOWS Score: 100 109 smashguy10.duckdns.org 2->109 121 Suricata IDS alerts for network traffic 2->121 123 Found malware configuration 2->123 125 Malicious sample detected (through community Yara rule) 2->125 129 12 other signatures 2->129 10 wscript.exe 1 1 2->10         started        13 cmd.exe 1 2->13         started        15 cmd.exe 1 2->15         started        17 8 other processes 2->17 signatures3 127 Uses dynamic DNS services 109->127 process4 dnsIp5 135 Wscript starts Powershell (via cmd or directly) 10->135 137 Windows Scripting host queries suspicious COM object (likely to drop second stage) 10->137 139 Suspicious execution chain found 10->139 141 Creates processes via WMI 10->141 20 cmd.exe 1 10->20         started        23 cmd.exe 1 13->23         started        25 conhost.exe 13->25         started        27 cmd.exe 1 15->27         started        29 conhost.exe 15->29         started        107 127.0.0.1 unknown unknown 17->107 31 cmd.exe 1 17->31         started        33 cmd.exe 1 17->33         started        35 cmd.exe 17->35         started        37 11 other processes 17->37 signatures6 process7 signatures8 131 Suspicious powershell command line found 20->131 133 Wscript starts Powershell (via cmd or directly) 20->133 39 cmd.exe 1 20->39         started        41 conhost.exe 20->41         started        43 cmd.exe 1 23->43         started        46 cmd.exe 1 27->46         started        48 cmd.exe 1 31->48         started        50 cmd.exe 1 33->50         started        52 cmd.exe 35->52         started        54 cmd.exe 37->54         started        56 3 other processes 37->56 process9 signatures10 58 cmd.exe 2 39->58         started        151 Suspicious powershell command line found 43->151 153 Wscript starts Powershell (via cmd or directly) 43->153 61 powershell.exe 43->61         started        64 conhost.exe 43->64         started        66 2 other processes 46->66 68 2 other processes 48->68 70 2 other processes 50->70 72 2 other processes 52->72 74 2 other processes 54->74 76 6 other processes 56->76 process11 file12 143 Suspicious powershell command line found 58->143 145 Wscript starts Powershell (via cmd or directly) 58->145 78 powershell.exe 5 32 58->78         started        83 conhost.exe 58->83         started        85 C:\Users\user\AppData\Roaming\...\5c25.bat, ASCII 61->85 dropped 147 Detected Remcos RAT 61->147 149 Loading BitLocker PowerShell Module 61->149 87 C:\Users\user\AppData\Roaming\...\e0d5.bat, ASCII 66->87 dropped 89 C:\Users\user\AppData\Roaming\...\7bcc.bat, ASCII 68->89 dropped 91 C:\Users\user\AppData\Roaming\...\f493.bat, ASCII 70->91 dropped 93 C:\Users\user\AppData\Roaming\...\26db.bat, ASCII 72->93 dropped 95 C:\Users\user\AppData\Roaming\...\05f5.bat, ASCII 74->95 dropped 97 C:\Users\user\AppData\Roaming\...\d2a6.bat, ASCII 76->97 dropped 99 C:\Users\user\AppData\Roaming\...\473b.bat, ASCII 76->99 dropped 101 C:\Users\user\AppData\Roaming\...\3272.bat, ASCII 76->101 dropped signatures13 process14 dnsIp15 111 smashguy10.duckdns.org 192.145.124.6, 49684, 49691, 53924 M247GB Romania 78->111 103 C:\Users\user\AppData\Roaming\...\bd37.bat, ASCII 78->103 dropped 105 C:\ProgramData\remcos\logs.dat, data 78->105 dropped 113 Detected Remcos RAT 78->113 115 Drops script or batch files to the startup folder 78->115 117 Found suspicious powershell code related to unpacking or dynamic code loading 78->117 119 2 other signatures 78->119 file16 signatures17
Score:
73%
Verdict:
Malware
File Type:
SCRIPT
Link:
https://malprob.io/report/a3ee2f845200a4782510c67342e6f440ce804b9d724b33e0ddf9d3956d22f851
Gathering data
Detection:
remcos
Create hunting rule
Link:
https://mwdb.cert.pl/sample/a3ee2f845200a4782510c67342e6f440ce804b9d724b33e0ddf9d3956d22f851/
Verdict:
Malicious
Threat:
Family.REMCOS
Link:
https://tip.neiki.dev/file/a3ee2f845200a4782510c67342e6f440ce804b9d724b33e0ddf9d3956d22f851
Threat name:
Script-JS.Backdoor.Remcos
Create hunting rule
Status:
Suspicious
First seen:
2025-09-29 07:16:26 UTC
File Type:
Text
AV detection:
11 of 38 (28.95%)
Threat level:
  5/5
Detection(s):
Malicious file
Link:
https://check.spamhaus.org/check/?searchterm=upxc7bcsacshqjiqyzzufzxuidhias45ojfthyg57hjzk3jc7biq._file
Verdict:
malicious
Label(s):
donut_injector
Create hunting rule
remcos
Create hunting rule
Similar samples:
15ddcaed4f9a9e7ef07e4f64b3850a76b0d8ac74971d770b936c6bce3e415e6b
RemcosRAT
1eeefad3b4af3c0592006bbf93b5ef9c958d72470aa26bb2c042f5e3966eb059
RemcosRAT
4245e415209b1f13c215b623c3ccf1020d1e01e7ac9084a2f20d7a1abf79834a
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b22d450f1a3799f1c1d1ab6a655a8f9987b32d7d15b254fd586fb4aab34a9d65
RemcosRAT
b9ddd7911daf8a8d71a31e87bdf7cc96ae29c53b28ba508f7a4b48e6fe081a96
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c21c7cc14b61c0426a6c6fe79bb99c72cebfee16c9f6fd08195ad8800a26c6b7
RemcosRAT
ccf51177e35672532087c0035850fa3c3842a99d39f0d93275f9cf383534fe78
RemcosRAT
d96e82d980a8872cb39e5ab834e00ea41f4572321f2e5c5a5aab71d3d03f3458
RemcosRAT
error
RemcosRAT
+ 1'535 additional samples on MalwareBazaar
Result
Malware family:
donutloader
Create hunting rule
Score:
  10/10
Tags:
family:donutloader discovery execution loader
Link:
https://tria.ge/reports/250929-q3r9kagn7z/
Behaviour
Suspicious behavior: EnumeratesProcesses
Suspicious use of AdjustPrivilegeToken
Suspicious use of SetWindowsHookEx
Suspicious use of WriteProcessMemory
Command and Scripting Interpreter: JavaScript
System Location Discovery: System Language Discovery
Command and Scripting Interpreter: PowerShell
Drops startup file
Badlisted process makes network request
Detects DonutLoader
DonutLoader
Donutloader family
Process spawned unexpected child process
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/a3ee2f845200a4782510c67342e6f440ce804b9d724b33e0ddf9d3956d22f851

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:cobalt_strike_tmp01925d3f
Create hunting rule
Author:The DFIR Report
Description:files - file ~tmp01925d3f.exe
Reference:https://thedfirreport.com
Rule name:CP_AllMal_Detector
Create hunting rule
Author:DiegoAnalytics
Description:CrossPlatform All Malwares Detector: Detect PE, ELF, Mach-O, scripts, archives; overlay, obfuscation, encryption, spoofing, hiding, high entropy, network communication
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__API
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:Disable_Defender
Create hunting rule
Author:iam-py-test
Description:Detect files disabling or modifying Windows Defender, Windows Firewall, or Microsoft Smartscreen
Rule name:FreddyBearDropper
Create hunting rule
Author:Dwarozh Hoshiar
Description:Freddy Bear Dropper is dropping a malware through base63 encoded powershell scrip.
Rule name:golang_bin_JCorn_CSC846
Create hunting rule
Author:Justin Cornwell
Description:CSC-846 Golang detection ruleset
Rule name:INDICATOR_SUSPICIOUS_EXE_UACBypass_CMSTPCOM
Create hunting rule
Author:ditekSHen
Description:Detects Windows exceutables bypassing UAC using CMSTP COM interfaces. MITRE (T1218.003)
Rule name:pe_detect_tls_callbacks
Create hunting rule
Rule name:pe_no_import_table
Create hunting rule
Description:Detect pe file that no import table
Rule name:Remcos
Create hunting rule
Author:kevoreilly
Description:Remcos Payload
Rule name:remcos_
Create hunting rule
Author:Michelle Khalil
Description:This rule detects unpacked remcos malware samples.
Rule name:REMCOS_RAT_variants
Create hunting rule
Rule name:Remcos_unpacked_PulseIntel
Create hunting rule
Author:PulseIntel
Description:Remcos Payload
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:ThreadControl__Context
Create hunting rule
Reference:https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara
Rule name:Windows_Trojan_Remcos_b296e965
Create hunting rule
Author:Elastic Security
Reference:https://www.elastic.co/security-labs/exploring-the-ref2731-intrusion-set
Rule name:win_remcos_auto
Create hunting rule
Author:Felix Bilstein - yara-signator at cocacoding dot com
Description:Detects win.remcos.
Rule name:win_remcos_rat_unpacked
Create hunting rule
Author:Matthew @ Embee_Research
Description:Detects strings present in remcos rat Samples.
Rule name:win_remcos_w0
Create hunting rule
Author:Matthew @ Embee_Research
Description:Detects strings present in remcos rat Samples.
Rule name:yarahub_win_remcos_rat_unpacked_aug_2023
Create hunting rule
Author:Matthew @ Embee_Research

File information

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

Comments