MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 b948266ac5c47a7a89f90b7d0bb5a7f6cf0578993bdbbbfeec8d85437b4cbf2a. 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: 11


Intelligence 11 IOCs YARA 29 File information Comments
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SHA256 hash: b948266ac5c47a7a89f90b7d0bb5a7f6cf0578993bdbbbfeec8d85437b4cbf2a
SHA3-384 hash: d0bfeceb58bfe2881558e42d8f4a25ad6a46c497e377d0f81b34533edfd8970147b20d62a85b5cacfb7915ad66aba8a4
SHA1 hash: 3f73f3fd05cb9e95ce4e390bf423038abc2fe035
MD5 hash: 8787c72312b474853b57d300e97d2ad6
humanhash: romeo-utah-missouri-angel
File name:HM-741-250820A.js
Download: download sample
Signature RemcosRAT
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File size:2'097'504 bytes
First seen:2025-09-01 09:33:59 UTC
Last seen:Never
File type:Java Script (JS) js
MIME type:text/plain
ssdeep 24576:JPMYqg803Q4JEsEXA0rgf1lZEeg2QxCblTy8L3u9xWrAStJI0dcqNvNnM88koQcd:9zxJEsh1ZEeDB2VI2qvlD2UsRek
TLSH T18CA5E0338D57BC492BDC258580CE3CD14D6E1F9781789ED4999EF1B2228AE125EEC4BC
Magika vba
Reporter abuse_ch
Tags:js RAT RemcosRAT

Intelligence

File Origin
# of uploads :
1
# of downloads :
89
Origin country :
SE SE
Vendor Threat Intelligence
Detection(s):
SecuriteInfo.com.PUA.Base64EXE-1.UNOFFICIAL
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Verdict:
Malicious
Score:
94.9%
Link:
https://cyber-fortress.com/docs/result/index.php?id=68b568c2eb163e0ec183f8f7
Tags:
delphi emotet
Verdict:
Malicious
Threat level:
  10/10
Confidence:
100%
Tags:
dropper obfuscated obfuscated
Link:
https://www.filescan.io/uploads/68b5696b39a6221faa7878ad/reports/61231c97-4b73-4710-abb5-34b6ab667d5d/overview
Verdict:
Unknown
Link:
https://www.hybrid-analysis.com/sample/b948266ac5c47a7a89f90b7d0bb5a7f6cf0578993bdbbbfeec8d85437b4cbf2a
Verdict:
Malicious
File Type:
js
First seen:
2025-09-01T01:57:00Z UTC
Last seen:
2025-09-01T01:57:00Z UTC
Hits:
~1000
Link:
https://opentip.kaspersky.com/b948266ac5c47a7a89f90b7d0bb5a7f6cf0578993bdbbbfeec8d85437b4cbf2a/results?tab=lookup
Result
Threat name:
Remcos, DBatLoader
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Detection:
malicious
Classification:
rans.phis.troj.spyw.expl.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1768846
Signature
Allocates many large memory junks
Allocates memory in foreign processes
Antivirus / Scanner detection for submitted sample
Antivirus detection for dropped file
Attempt to bypass Chrome Application-Bound Encryption
Benign windows process drops PE files
C2 URLs / IPs found in malware configuration
Contains functionality to bypass UAC (CMSTPLUA)
Contains functionality to check if a debugger is running (CheckRemoteDebuggerPresent)
Contains functionality to register a low level keyboard hook
Contains functionality to steal Chrome passwords or cookies
Contains functionality to steal Firefox passwords or cookies
Contains functionalty to change the wallpaper
Detected Remcos RAT
Early bird code injection technique detected
Found hidden mapped module (file has been removed from disk)
Found malware configuration
Found stalling execution ending in API Sleep call
Installs a global keyboard hook
JavaScript file contains suspicious strings
Joe Sandbox ML detected suspicious sample
JScript performs obfuscated calls to suspicious functions
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
Queues an APC in another process (thread injection)
Sigma detected: DLL Search Order Hijackig Via Additional Space in Path
Sigma detected: Execution from Suspicious Folder
Sigma detected: Files With System Process Name In Unsuspected Locations
Sigma detected: Potential Data Stealing Via Chromium Headless Debugging
Sigma detected: Remcos
Sigma detected: WScript or CScript Dropper
Suricata IDS alerts for network traffic
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)
Uses schtasks.exe or at.exe to add and modify task schedules
Windows Scripting host queries suspicious COM object (likely to drop second stage)
Writes to foreign memory regions
Yara detected DBatLoader
Yara detected Remcos RAT
Yara detected UAC Bypass using CMSTP
Yara detected WebBrowserPassView password recovery tool
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 1768846 Sample: HM-741-250820A.js Startdate: 01/09/2025 Architecture: WINDOWS Score: 100 64 1313global.cc 2->64 66 geoplugin.net 2->66 84 Suricata IDS alerts for network traffic 2->84 86 Found malware configuration 2->86 88 Malicious sample detected (through community Yara rule) 2->88 90 17 other signatures 2->90 10 wscript.exe 1 2 2->10         started        14 rundll32.exe 3 2->14         started        signatures3 process4 file5 62 C:\Users\user\AppData\Local\Temp\x.exe, PE32 10->62 dropped 106 Benign windows process drops PE files 10->106 108 JScript performs obfuscated calls to suspicious functions 10->108 110 Windows Scripting host queries suspicious COM object (likely to drop second stage) 10->110 16 x.exe 6 10->16         started        20 Spariuou.exe 14->20         started        signatures6 process7 file8 52 C:\Users\Public\...\Spariuou.exe (copy), PE32 16->52 dropped 74 Early bird code injection technique detected 16->74 76 Uses schtasks.exe or at.exe to add and modify task schedules 16->76 78 Allocates memory in foreign processes 16->78 82 2 other signatures 16->82 22 SndVol.exe 4 17 16->22         started        27 cmd.exe 1 16->27         started        29 cmd.exe 1 16->29         started        31 schtasks.exe 1 16->31         started        80 Allocates many large memory junks 20->80 33 SndVol.exe 20->33         started        signatures9 process10 dnsIp11 68 1313global.cc 178.16.52.249, 2000, 49691, 49692 DUSNET-ASDE Germany 22->68 70 geoplugin.net 178.237.33.50, 49694, 80 ATOM86-ASATOM86NL Netherlands 22->70 72 127.0.0.1 unknown unknown 22->72 54 C:\Users\user\AppData\Local\Temp\THC0F0.tmp, MS-DOS 22->54 dropped 56 C:\Users\user\AppData\Local\Temp\THBE5F.tmp, MS-DOS 22->56 dropped 58 C:\Users\user\AppData\Local\Temp\THBD54.tmp, PE32 22->58 dropped 60 2 other malicious files 22->60 dropped 98 Contains functionality to bypass UAC (CMSTPLUA) 22->98 100 Detected Remcos RAT 22->100 102 Attempt to bypass Chrome Application-Bound Encryption 22->102 104 10 other signatures 22->104 35 RmClient.exe 1 22->35         started        38 RmClient.exe 1 22->38         started        40 RmClient.exe 2 22->40         started        48 2 other processes 22->48 42 conhost.exe 27->42         started        44 conhost.exe 29->44         started        46 conhost.exe 31->46         started        file12 signatures13 process14 signatures15 92 Tries to steal Instant Messenger accounts or passwords 35->92 94 Tries to steal Mail credentials (via file / registry access) 35->94 96 Tries to harvest and steal browser information (history, passwords, etc) 38->96 50 msedge.exe 48->50         started        process16
Score:
97%
Verdict:
Malware
File Type:
SCRIPT
Link:
https://malprob.io/report/b948266ac5c47a7a89f90b7d0bb5a7f6cf0578993bdbbbfeec8d85437b4cbf2a
Gathering data
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/b948266ac5c47a7a89f90b7d0bb5a7f6cf0578993bdbbbfeec8d85437b4cbf2a/
Threat name:
Script-JS.Dropper.RemcosRAT
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Status:
Malicious
First seen:
2025-09-01 06:09:23 UTC
File Type:
Text
AV detection:
16 of 38 (42.11%)
Threat level:
  3/5
Detection(s):
Malicious file
Link:
https://check.spamhaus.org/check/?searchterm=xfecm2wfyr5hvcpzbn6qxnnh63hqk6ezhpn3x7xmrwcug62mx4va._file
Verdict:
malicious
Label(s):
dbatloader
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Similar samples:
error
RemcosRAT
Result
Malware family:
modiloader
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Score:
  10/10
Tags:
family:modiloader collection credential_access discovery execution persistence stealer trojan
Link:
https://tria.ge/reports/250901-llvadatmy5/
Behaviour
Enumerates system info in registry
Modifies registry class
Runs ping.exe
Scheduled Task/Job: Scheduled Task
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: NtCreateUserProcessBlockNonMicrosoftBinary
Suspicious use of AdjustPrivilegeToken
Suspicious use of FindShellTrayWindow
Suspicious use of SetWindowsHookEx
Suspicious use of WriteProcessMemory
Command and Scripting Interpreter: JavaScript
Enumerates physical storage devices
System Location Discovery: System Language Discovery
System Network Configuration Discovery: Internet Connection Discovery
Drops file in Program Files directory
Drops file in Windows directory
Suspicious use of SetThreadContext
Accesses Microsoft Outlook accounts
Checks computer location settings
Executes dropped EXE
Command and Scripting Interpreter: PowerShell
Uses browser remote debugging
Detected Nirsoft tools
ModiLoader Second Stage
NirSoft MailPassView
ModiLoader, DBatLoader
Modiloader family
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/b948266ac5c47a7a89f90b7d0bb5a7f6cf0578993bdbbbfeec8d85437b4cbf2a

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:botnet_plaintext_c2
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Author:cip
Description:Attempts to match at least some of the strings used in some botnet variants which use plaintext communication protocols.
Rule name:cobalt_strike_tmp01925d3f
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Author:The DFIR Report
Description:files - file ~tmp01925d3f.exe
Reference:https://thedfirreport.com
Rule name:CP_AllMal_Detector
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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
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Author:DiegoAnalytics
Description:Detects attempts to inject code into another process across PE, ELF, Mach-O binaries
Rule name:DebuggerCheck__API
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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:Disable_Defender
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Author:iam-py-test
Description:Detect files disabling or modifying Windows Defender, Windows Firewall, or Microsoft Smartscreen
Rule name:FreddyBearDropper
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Author:Dwarozh Hoshiar
Description:Freddy Bear Dropper is dropping a malware through base63 encoded powershell scrip.
Rule name:golang_bin_JCorn_CSC846
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Author:Justin Cornwell
Description:CSC-846 Golang detection ruleset
Rule name:INDICATOR_SUSPICIOUS_EXE_UACBypass_CMSTPCOM
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Author:ditekSHen
Description:Detects Windows exceutables bypassing UAC using CMSTP COM interfaces. MITRE (T1218.003)
Rule name:pe_detect_tls_callbacks
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Rule name:pe_no_import_table
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Description:Detect pe file that no import table
Rule name:Remcos
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Author:kevoreilly
Description:Remcos Payload
Rule name:remcos_
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Author:Michelle Khalil
Description:This rule detects unpacked remcos malware samples.
Rule name:REMCOS_RAT_variants
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Rule name:Remcos_unpacked_PulseIntel
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Author:PulseIntel
Description:Remcos Payload
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:Sus_Obf_Enc_Spoof_Hide_PE
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Author:XiAnzheng
Description:Check for Overlay, Obfuscating, Encrypting, Spoofing, Hiding, or Entropy Technique(can create FP)
Rule name:ThreadControl__Context
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Reference:https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara
Rule name:Windows_Trojan_Remcos_b296e965
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Author:Elastic Security
Reference:https://www.elastic.co/security-labs/exploring-the-ref2731-intrusion-set
Rule name:win_remcos_auto
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Author:Felix Bilstein - yara-signator at cocacoding dot com
Description:Detects win.remcos.
Rule name:win_remcos_rat_unpacked
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Author:Matthew @ Embee_Research
Description:Detects strings present in remcos rat Samples.
Rule name:win_remcos_w0
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Author:Matthew @ Embee_Research
Description:Detects strings present in remcos rat Samples.
Rule name:yarahub_win_remcos_rat_unpacked_aug_2023
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Author:Matthew @ Embee_Research

File information

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

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