MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 3f61a4b0743e17c8cdba55b9fa18612c0682f16e53650cbce76eaba3a367402b. 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 1 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 3f61a4b0743e17c8cdba55b9fa18612c0682f16e53650cbce76eaba3a367402b
SHA3-384 hash: 7ca5cf40ce623f3cf024bfd0d37069d17283d63809e3183625e99797633c4a290b098da238b65a1ff6f23aa617170f9c
SHA1 hash: 11987b974324850a242f6cf9b0f7b1c1d1e6a796
MD5 hash: 35ae922495c21037fd6fc8dfc29c5e0d
humanhash: three-don-nitrogen-cup
File name:Bestellung Nr. 4500087992.js
Download: download sample
Signature RemcosRAT
Create hunting rule
File size:387'673 bytes
First seen:2025-12-09 12:59:35 UTC
Last seen:Never
File type:Java Script (JS) js
MIME type:text/plain
ssdeep 6144:82A6xrpmnDgpHJ5gmBcmWI2mfWq8iDMP4yL96LY9GDYtqMP6I0okE5iUXyFO1Og2:r6DIJ9BEIf1A4lco9qXygd4b
Threatray 2'558 similar samples on MalwareBazaar
TLSH T1D1844B20EE34067A0F471BADFD990B62C9FD8609462650F1F6DE070E61065ECE3FE669
Magika javascript
Reporter abuse_ch
Tags:js RAT RemcosRAT

Intelligence

File Origin
# of uploads :
1
# of downloads :
130
Origin country :
SE SE
Vendor Threat Intelligence
No detections
Gathering data
Verdict:
Malicious
Threat level:
  10/10
Confidence:
100%
Tags:
base64 cmd evasive explorer lolbin obfuscated persistence powershell repaired
Link:
https://www.filescan.io/uploads/69381d70bba50eaf0429a1cb/reports/ba1588bd-e3d0-45b8-be18-259dc1e9fa4b/overview
Verdict:
Suspicious
Labled as:
Trojan.Script.Heuristic
Link:
https://www.hybrid-analysis.com/sample/3f61a4b0743e17c8cdba55b9fa18612c0682f16e53650cbce76eaba3a367402b
Verdict:
Malicious
File Type:
js
First seen:
2025-12-09T04:33:00Z UTC
Last seen:
2025-12-10T22:11:00Z UTC
Hits:
~100
Detections:
HEUR:Trojan.Script.SAgent.gen HEUR:Trojan.Script.Generic HEUR:Trojan.Script.Agent.gen Trojan.Makoob.HTTP.C&C Backdoor.Win32.Androm.a Backdoor.Androm.HTTP.Download Trojan.JS.SAgent.sb
Link:
https://opentip.kaspersky.com/3f61a4b0743e17c8cdba55b9fa18612c0682f16e53650cbce76eaba3a367402b/results?tab=lookup
Result
Threat name:
Remcos, GuLoader
Create hunting rule
Detection:
malicious
Classification:
phis.troj.spyw.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1829449
Signature
Antivirus detection for dropped file
C2 URLs / IPs found in malware configuration
Detected Remcos RAT
Early bird code injection technique detected
Found hidden mapped module (file has been removed from disk)
Found malware configuration
Found suspicious powershell code related to unpacking or dynamic code loading
Injects code into the Windows Explorer (explorer.exe)
JavaScript file contains suspicious strings
JavaScript source code contains functionality to generate code involving a shell, file or stream
Joe Sandbox ML detected suspicious sample
JScript performs obfuscated calls to suspicious functions
Loading BitLocker PowerShell Module
Malicious sample detected (through community Yara rule)
Maps a DLL or memory area into another process
Multi AV Scanner detection for dropped file
Multi AV Scanner detection for submitted file
Queries sensitive service information (via WMI, Win32_LogicalDisk, often done to detect sandboxes)
Queues an APC in another process (thread injection)
Sigma detected: Remcos
Sigma detected: WScript or CScript Dropper
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 Instant Messenger accounts or passwords
Tries to steal Mail credentials (via file / registry access)
Tries to steal Mail credentials (via file registry)
Unusual module load detection (module proxying)
Windows Scripting host queries suspicious COM object (likely to drop second stage)
Writes to foreign memory regions
Yara detected GuLoader
Yara detected Powershell decode and execute
Yara detected Remcos RAT
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 signatures2 2 Behavior Graph ID: 1829449 Sample: Bestellung Nr. 4500087992.js Startdate: 09/12/2025 Architecture: WINDOWS Score: 100 59 Suricata IDS alerts for network traffic 2->59 61 Found malware configuration 2->61 63 Malicious sample detected (through community Yara rule) 2->63 65 12 other signatures 2->65 8 powershell.exe 34 2->8         started        11 explorer.exe 2->11         started        13 wscript.exe 1 3 2->13         started        15 svchost.exe 1 1 2->15         started        process3 dnsIp4 79 Early bird code injection technique detected 8->79 81 Writes to foreign memory regions 8->81 83 Found suspicious powershell code related to unpacking or dynamic code loading 8->83 91 5 other signatures 8->91 18 msiexec.exe 4 9 8->18         started        23 msiexec.exe 8->23         started        25 conhost.exe 8->25         started        27 cmd.exe 1 11->27         started        85 JScript performs obfuscated calls to suspicious functions 13->85 87 Injects code into the Windows Explorer (explorer.exe) 13->87 89 Windows Scripting host queries suspicious COM object (likely to drop second stage) 13->89 29 explorer.exe 1 13->29         started        57 127.0.0.1 unknown unknown 15->57 signatures5 process6 dnsIp7 53 151.241.100.150, 21000, 49706, 49707 RASANAIR Iran (ISLAMIC Republic Of) 18->53 47 C:\Users\user\AppData\Local\Temp\THD1E3.tmp, MS-DOS 18->47 dropped 49 C:\Users\user\AppData\Local\Temp\THD1B3.tmp, MS-DOS 18->49 dropped 51 C:\Users\user\AppData\Local\Temp\THD1A2.tmp, MS-DOS 18->51 dropped 67 Detected Remcos RAT 18->67 69 Writes to foreign memory regions 18->69 71 Maps a DLL or memory area into another process 18->71 31 RmClient.exe 2 18->31         started        34 RmClient.exe 1 18->34         started        36 RmClient.exe 1 18->36         started        43 2 other processes 18->43 73 Found hidden mapped module (file has been removed from disk) 23->73 75 Unusual module load detection (module proxying) 23->75 77 Switches to a custom stack to bypass stack traces 23->77 38 powershell.exe 14 32 27->38         started        41 conhost.exe 1 27->41         started        file8 signatures9 process10 dnsIp11 93 Tries to steal Mail credentials (via file registry) 31->93 95 Tries to harvest and steal browser information (history, passwords, etc) 31->95 97 Unusual module load detection (module proxying) 31->97 99 Tries to steal Instant Messenger accounts or passwords 34->99 101 Tries to steal Mail credentials (via file / registry access) 34->101 55 82.22.174.231, 49692, 49705, 80 NTLGB United Kingdom 38->55 103 Found suspicious powershell code related to unpacking or dynamic code loading 38->103 105 Queries sensitive service information (via WMI, Win32_LogicalDisk, often done to detect sandboxes) 38->105 107 Loading BitLocker PowerShell Module 38->107 45 conhost.exe 38->45         started        signatures12 process13
Score:
86%
Verdict:
Malware
File Type:
SCRIPT
Link:
https://malprob.io/report/3f61a4b0743e17c8cdba55b9fa18612c0682f16e53650cbce76eaba3a367402b
Verdict:
inconclusive
YARA:
3 match(es)
Link:
https://app.malva.re/file/35ae922495c21037fd6fc8dfc29c5e0d
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/3f61a4b0743e17c8cdba55b9fa18612c0682f16e53650cbce76eaba3a367402b/
Verdict:
Malicious
Threat:
Family.REMCOS
Link:
https://tip.neiki.dev/file/3f61a4b0743e17c8cdba55b9fa18612c0682f16e53650cbce76eaba3a367402b
Threat name:
Script-JS.Backdoor.Remcos
Create hunting rule
Status:
Malicious
First seen:
2025-12-09 13:10:15 UTC
AV detection:
9 of 24 (37.50%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=h5q2jmduhyl4rtn2kw47ugdbfqdif4loknsqzphhn2v2hi3hiavq._file
Verdict:
malicious
Label(s):
cloudeye
Create hunting rule
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error
RemcosRAT
f21896c306f3ea69ebe12428dd3489ed5784b08a049de8c6d3363e4d2770ecac
RemcosRAT
+ 2'548 additional samples on MalwareBazaar
Result
Malware family:
remcos
Create hunting rule
Score:
  10/10
Tags:
family:remcos botnet:remotehost collection discovery execution rat
Link:
https://tria.ge/reports/251209-p8xkssez9d/
Behaviour
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: MapViewOfSection
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
Command and Scripting Interpreter: JavaScript
Command and Scripting Interpreter: PowerShell
Enumerates physical storage devices
System Location Discovery: System Language Discovery
Drops file in System32 directory
Suspicious use of NtCreateThreadExHideFromDebugger
Suspicious use of NtSetInformationThreadHideFromDebugger
Suspicious use of SetThreadContext
Accesses Microsoft Outlook accounts
Checks computer location settings
Badlisted process makes network request
Detected Nirsoft tools
NirSoft MailPassView
Remcos
Remcos family
Malware Config
C2 Extraction:
151.241.100.150:21000
151.241.100.150:2100
151.241.100.150:2700
151.241.100.150:27000
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/3f61a4b0743e17c8cdba55b9fa18612c0682f16e53650cbce76eaba3a367402b

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: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)

File information

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

Comments