MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 55d4016c8f623f7b769eed0a0299f664c48e58816e963636e47dce86fe0a16eb. 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
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 55d4016c8f623f7b769eed0a0299f664c48e58816e963636e47dce86fe0a16eb
SHA3-384 hash: cb0289b6f72268be049c9ad8e437197cd24c10a374c860039ef6d781cd754adfe10004ac44b864719615541a1437a544
SHA1 hash: 49e932dc8785f1b284fa9ce1f6a03b8b1c14666a
MD5 hash: 503fd9234580b87f709f7e1c370839d1
humanhash: finch-apart-johnny-table
File name:Purchase Inquiry Product Order 09292025.js
Download: download sample
Signature RemcosRAT
Create hunting rule
File size:5'774'194 bytes
First seen:2025-10-01 13:31:29 UTC
Last seen:Never
File type:Java Script (JS) js
MIME type:text/plain
ssdeep 24576:lIrHaoGQSnOg8sCwO+cdIGQYuCa5Pfdp04lhNik/bRN4lfWFKODemaxUfDW3AqyD:x
Threatray 1'564 similar samples on MalwareBazaar
TLSH T17A461D21DD189B99E02EF1AD521A39196DC29FEFC4EF51C5FA732EEBE889700C51C241
Magika javascript
Reporter abuse_ch
Tags:js RAT RemcosRAT

Intelligence

File Origin
# of uploads :
1
# of downloads :
101
Origin country :
SE SE
Vendor Threat Intelligence
Verdict:
Malicious
Score:
92.5%
Link:
https://cyber-fortress.com/docs/result/index.php?id=68dd2d4940b7da0b4eb94371
Tags:
obfuscate autorun xtreme shell
Verdict:
Likely Malicious
Threat level:
  7.5/10
Confidence:
100%
Tags:
masquerade obfuscated
Link:
https://www.filescan.io/uploads/68dd2d9e74e5a289899c4ba0/reports/271d454b-5dc0-470d-ab76-1b9d4226cab2/overview
Verdict:
Unknown
Link:
https://www.hybrid-analysis.com/sample/55d4016c8f623f7b769eed0a0299f664c48e58816e963636e47dce86fe0a16eb
Verdict:
Malicious
File Type:
js
First seen:
2025-10-01T04:57:00Z UTC
Last seen:
2025-10-03T07:46:00Z UTC
Hits:
~100
Detections:
Trojan.JS.SAgent.sb HEUR:Trojan.PowerShell.Tesre.sb Trojan-Downloader.JS.Cryptoload.sb HEUR:Trojan.Script.Generic Trojan.PowerShell.AmsiBypass.sb Trojan.BAT.Agent.sb HEUR:Trojan.BAT.Tesre.gen HEUR:Trojan.BAT.Obfus.gen PDM:Trojan.Win32.Generic Trojan.VBS.SAgent.sb
Link:
https://opentip.kaspersky.com/55d4016c8f623f7b769eed0a0299f664c48e58816e963636e47dce86fe0a16eb/results?tab=lookup
Result
Threat name:
Remcos
Create hunting rule
Detection:
malicious
Classification:
rans.troj.spyw.expl.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1787338
Signature
.NET source code contains a sample name check
.NET source code references suspicious native API functions
C2 URLs / IPs found in malware configuration
Contains functionality to determine the online IP of the system
Contains functionality to register a low level keyboard hook
Contains functionality to steal Firefox passwords or cookies
Contains functionalty to change the wallpaper
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
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: 1787338 Sample: Purchase Inquiry Product Or... Startdate: 01/10/2025 Architecture: WINDOWS Score: 100 109 jimbo090.duckdns.org 2->109 121 Found malware configuration 2->121 123 Malicious sample detected (through community Yara rule) 2->123 125 Yara detected UAC Bypass using CMSTP 2->125 129 11 other signatures 2->129 10 wscript.exe 1 1 2->10         started        14 cmd.exe 1 2->14         started        16 cmd.exe 1 2->16         started        18 7 other processes 2->18 signatures3 127 Uses dynamic DNS services 109->127 process4 file5 85 C:\Users\user\...\InterstellarCore.bat, ASCII 10->85 dropped 141 Wscript starts Powershell (via cmd or directly) 10->141 143 Windows Scripting host queries suspicious COM object (likely to drop second stage) 10->143 145 Suspicious execution chain found 10->145 147 Creates processes via WMI 10->147 20 cmd.exe 1 10->20         started        23 cmd.exe 1 14->23         started        25 conhost.exe 14->25         started        27 cmd.exe 1 16->27         started        29 conhost.exe 16->29         started        31 cmd.exe 1 18->31         started        33 cmd.exe 18->33         started        35 cmd.exe 18->35         started        37 11 other processes 18->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 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        66 2 other processes 43->66 68 2 other processes 46->68 149 Suspicious powershell command line found 48->149 151 Wscript starts Powershell (via cmd or directly) 48->151 61 powershell.exe 48->61         started        64 conhost.exe 48->64         started        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 135 Suspicious powershell command line found 58->135 137 Wscript starts Powershell (via cmd or directly) 58->137 78 powershell.exe 5 32 58->78         started        83 conhost.exe 58->83         started        87 C:\Users\user\AppData\Roaming\...\7d5f.bat, ASCII 61->87 dropped 139 Detected Remcos RAT 61->139 89 C:\Users\user\AppData\Roaming\...\3983.bat, ASCII 66->89 dropped 91 C:\Users\user\AppData\Roaming\...\f7a0.bat, ASCII 68->91 dropped 93 C:\Users\user\AppData\Roaming\...\bdf4.bat, ASCII 70->93 dropped 95 C:\Users\user\AppData\Roaming\...\2b1c.bat, ASCII 72->95 dropped 97 C:\Users\user\AppData\Roaming\...\060d.bat, ASCII 74->97 dropped 99 C:\Users\user\AppData\Roaming\...\ee00.bat, ASCII 76->99 dropped 101 C:\Users\user\AppData\Roaming\...\9b3f.bat, ASCII 76->101 dropped 103 C:\Users\user\AppData\Roaming\...\6d15.bat, ASCII 76->103 dropped signatures13 process14 dnsIp15 111 jimbo090.duckdns.org 138.199.59.6, 49689, 49692, 49693 ORANGE-BUSINESS-SERVICES-IPSN-ASNFR European Union 78->111 105 C:\Users\user\AppData\Roaming\...\8a1f.bat, ASCII 78->105 dropped 107 C:\ProgramData\remcos\logs.dat, data 78->107 dropped 113 Detected Remcos RAT 78->113 115 Contains functionality to determine the online IP of the system 78->115 117 Contains functionalty to change the wallpaper 78->117 119 6 other signatures 78->119 file16 signatures17
Score:
93%
Verdict:
Malware
File Type:
SCRIPT
Link:
https://malprob.io/report/55d4016c8f623f7b769eed0a0299f664c48e58816e963636e47dce86fe0a16eb
Gathering data
Detection:
remcos
Create hunting rule
Link:
https://mwdb.cert.pl/sample/55d4016c8f623f7b769eed0a0299f664c48e58816e963636e47dce86fe0a16eb/
Verdict:
Malicious
Threat:
Family.REMCOS
Link:
https://tip.neiki.dev/file/55d4016c8f623f7b769eed0a0299f664c48e58816e963636e47dce86fe0a16eb
Threat name:
Script-JS.Backdoor.Remcos
Create hunting rule
Status:
Suspicious
First seen:
2025-10-01 11:04:19 UTC
File Type:
Text (HTML)
AV detection:
12 of 38 (31.58%)
Threat level:
  5/5
Detection(s):
Malicious file
Link:
https://check.spamhaus.org/check/?searchterm=kxkac3epmi7xw5u65ufafgpwmtci4webn2ldmnxepxhin7qkc3vq._file
Verdict:
malicious
Label(s):
remcos
Create hunting rule
donut_injector
Create hunting rule
Similar samples:
15ddcaed4f9a9e7ef07e4f64b3850a76b0d8ac74971d770b936c6bce3e415e6b
RemcosRAT
1eeefad3b4af3c0592006bbf93b5ef9c958d72470aa26bb2c042f5e3966eb059
RemcosRAT
4245e415209b1f13c215b623c3ccf1020d1e01e7ac9084a2f20d7a1abf79834a
RemcosRAT
a3ee2f845200a4782510c67342e6f440ce804b9d724b33e0ddf9d3956d22f851
RemcosRAT
b22d450f1a3799f1c1d1ab6a655a8f9987b32d7d15b254fd586fb4aab34a9d65
RemcosRAT
c21c7cc14b61c0426a6c6fe79bb99c72cebfee16c9f6fd08195ad8800a26c6b7
RemcosRAT
d96e82d980a8872cb39e5ab834e00ea41f4572321f2e5c5a5aab71d3d03f3458
RemcosRAT
error
RemcosRAT
+ 1'554 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/251001-qtcshsvxd1/
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.

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