MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 1a338cc60ab238a3fd84671c4ad1523c0c8ee3c6bdd6889859d997c101fecc24. 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 37 File information Comments

SHA256 hash:	1a338cc60ab238a3fd84671c4ad1523c0c8ee3c6bdd6889859d997c101fecc24
SHA3-384 hash:	6869fc36d9d3234cd9bd5859536bcf9eac9255acdb5b37fda0ac3f750f58ac4aea8b0fdd2c72387f1a71a85c3792ad77
SHA1 hash:	9448962646439f6d3b1efdbc82cef12ba53f97da
MD5 hash:	31ff013a6cb5eb2144596437b5279028
humanhash:	equal-winter-tennis-september
File name:	RFQ Items Details Specification.JS
Download:	download sample
Signature	RemcosRAT Create hunting rule
File size:	5'546'450 bytes
First seen:	2026-10-29 09:15:43 UTC
Last seen:	Never
File type:	js
MIME type:	application/javascript
ssdeep	98304:ZlS1KtxyX+hPH2jT6JT/gHdGGg8K726TOGNoFfmR52CJyUyE+xUW2sJlbIFqEgG1:7uTY0HAVy1soFfmR52AyUynQF2JRCrZL
TLSH	T11B461782234699F2762EBB1CD636D960A95A200317C5DF3D30BC9317BB99D07A35CED2
Magika	javascript
Reporter	abuse_ch
Tags:	js RAT RemcosRAT

Intelligence

File Origin

# of uploads :

# of downloads :

180

Origin country :

Vendor Threat Intelligence

No detections

Detection(s):

SecuriteInfo.com.Other.Malware-gen.74582741.UNOFFICIAL

Verdict:

Malicious

Score:

91.7%

Link:

https://cyber-fortress.com/docs/result/index.php?id=6ae30ee7b175ade21dce7ed0

Tags:

cobalt shell sage blic

Verdict:

Malicious

Threat level:

10/10

Confidence:

100%

Tags:

anti-debug dropper evasive obfuscated obfuscated packed reconnaissance repaired

Link:

https://www.filescan.io/uploads/6ae30ee1c35eb29bc0aad8ad/reports/91d0bdf6-01fd-42c1-8393-0cd71b3b24be/overview

Verdict:

Malicious

Labled as:

JS/TrojanDropper.ModiLoader

Link:

https://www.hybrid-analysis.com/sample/1a338cc60ab238a3fd84671c4ad1523c0c8ee3c6bdd6889859d997c101fecc24

Verdict:

Malicious

File Type:

First seen:

2026-10-28T20:02:00Z UTC

Last seen:

2026-10-28T21:33:00Z UTC

Hits:

~10

Link:

https://opentip.kaspersky.com/1a338cc60ab238a3fd84671c4ad1523c0c8ee3c6bdd6889859d997c101fecc24/results?tab=lookup

Result

Threat name:

Remcos, DonutLoader

Detection:

malicious

Classification:

troj.spyw.expl.evad

Score:

100 / 100

Link:

https://www.joesandbox.com/analysis/1994524

Signature

Attempt to bypass Chrome Application-Bound Encryption

C2 URLs / IPs found in malware configuration

Contains functionality to steal Internet Explorer form passwords

Detected Remcos RAT

Executes Lua script

Found API chain indicative of debugger detection

Found direct / indirect Syscall (likely to bypass EDR)

Found evasive API chain checking for user administrative privileges

Found hidden mapped module (file has been removed from disk)

Found malware configuration

Installs a global keyboard hook

JavaScript source code contains functionality to generate code involving a shell, file or stream

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)

Multi AV Scanner detection for submitted file

Sigma detected: Potential Data Stealing Via Chromium Headless Debugging

Sigma detected: Remcos

Sigma detected: WScript or CScript Dropper

Switches to a custom stack to bypass stack traces

Tries to detect sandboxes / dynamic malware analysis system (Installed program check)

Tries to harvest and steal browser information (history, passwords, etc)

Tries to steal Mail credentials (via file registry)

Unusual module load detection (module proxying)

Uses the Windows Restart Manager Abuse for Browser Credential File unlocking

Windows Scripting host queries suspicious COM object (likely to drop second stage)

Writes to foreign memory regions

WScript reads language and country specific registry keys (likely country aware script)

Yara detected DonutLoader

Yara detected Remcos RAT

Yara detected UAC Bypass using CMSTP

Behaviour

Behavior Graph:

Download SVG

Score:

98%

Verdict:

Malware

File Type:

SCRIPT

Link:

https://malprob.io/report/1a338cc60ab238a3fd84671c4ad1523c0c8ee3c6bdd6889859d997c101fecc24

Verdict:

inconclusive

YARA:

1 match(es)

Link:

https://app.malva.re/file/31ff013a6cb5eb2144596437b5279028

Detection:

remcos

Link:

https://mwdb.cert.pl/sample/1a338cc60ab238a3fd84671c4ad1523c0c8ee3c6bdd6889859d997c101fecc24/

Threat name:

Script-JS.Trojan.Heuristic

Status:

Malicious

First seen:

2026-10-29 01:00:30 UTC

File Type:

Text (JavaScript)

AV detection:

6 of 36 (16.67%)

Threat level:

2/5

Detection(s):

Malicious file

Link:

https://check.spamhaus.org/check/?searchterm=dizyzrqkwi4kh7mem4oevukshqgi5y6gxxlirgcz3gl4cap6zqsa._file

Result

Malware family:

remcos

Score:

10/10

Tags:

family:donutloader family:remcos botnet:remotehost credential_access discovery execution loader rat spyware stealer

Link:

https://tria.ge/reports/261029-k8nknsbx6r/

Behaviour

Checks processor information in registry

Enumerates system info in registry

Modifies registry class

NTFS ADS

Suspicious behavior: EnumeratesProcesses

Suspicious behavior: NtCreateUserProcessBlockNonMicrosoftBinary

Suspicious use of FindShellTrayWindow

Suspicious use of SetWindowsHookEx

Suspicious use of WriteProcessMemory

Command and Scripting Interpreter: JavaScript

Enumerates physical storage devices

Executes a command shell one-liner

Reads the TCP/IP host and domain name from the registry

System Time Discovery

Drops file in Program Files directory

Suspicious use of SetThreadContext

Checks computer location settings

Executes dropped EXE

Loads dropped DLL

Reads user/profile data of web browsers

Uses browser remote debugging

Detects DonutLoader

Family: DonutLoader

Family: Remcos

Malware Config

C2 Extraction:

worktoday.3utilities.com:1692

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/1a338cc60ab238a3fd84671c4ad1523c0c8ee3c6bdd6889859d997c101fecc24

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:	Check_OutputDebugStringA_iat Create hunting rule

Rule name:	cobalt_strike_tmp01925d3f Create hunting rule
Author:	The DFIR Report
Description:	files - file ~tmp01925d3f.exe
Reference:	https://thedfirreport.com

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:	DebuggerCheck__QueryInfo 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:	exploit_any_poppopret Create hunting rule
Author:	Jeff White [karttoon@gmail.com] @noottrak
Description:	Identify POP -> POP -> RET opcodes for quick ROP Gadget creation in target binaries.

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_Binary_References_Browsers Create hunting rule
Author:	ditekSHen
Description:	Detects binaries (Windows and macOS) referencing many web browsers. Observed in information stealers.

Rule name:	INDICATOR_SUSPICIOUS_EXE_SQLQuery_ConfidentialDataStore Create hunting rule
Author:	ditekSHen
Description:	Detects executables containing SQL queries to confidential data stores. Observed in infostealers

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:	MULTI_Malware_AgentTesla_ForgeAuto_ed343f78_Extrait Create hunting rule
Author:	Marjoriefort
Description:	Detects AgentTesla (inconnu, etat extrait)

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:	RANSOMWARE Create hunting rule
Author:	ToroGuitar

Rule name:	REMCOS_RAT_variants Create hunting rule

Rule name:	Remcos_unpacked_PulseIntel Create hunting rule
Author:	PulseIntel
Description:	Remcos Payload

Rule name:	SUSP_Script_PowerShell_Hidden_Launcher Create hunting rule
Author:	Marjoriefort
Description:	Script (JS/VBS) lancant PowerShell en mode furtif - dropper frais MalwareBazaar
Reference:	Veille fraicheur 2026-09-14 / cluster misses web

Rule name:	SUSP_VBS_Randomized_ActiveX_Downloader Create hunting rule
Author:	Marjoriefort
Description:	Dropper VBS obfusque : ActiveXObject a identifiant randomise (20 MAJ), SaveToFile, .Run
Reference:	Veille fraicheur 2026-09-14 / grappe VBS randomisee

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:	TigerRAT_pe_yaraify Create hunting rule
Author:	hunts-yara-code
Description:	YARAify-tightened byte rule from 9 sample(s) -- VERIFY hits

Rule name:	VECT_Ransomware Create hunting rule
Author:	Mustafa Bakhit
Description:	Detects activity associated with VECT ransomware. This includes registry modifications and deletions, execution of system and defense-evasion commands, suspicious API usage, mutex creation, file and memory manipulation, ransomware note generation, anti-debugging and anti-analysis techniques, and embedded cryptographic constants (SHA256) characteristic of this malware family. Designed for threat intelligence and malware detection environments.

Rule name:	Windows_Trojan_Remcos_921ef449 Create hunting rule
Author:	Elastic Security

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_Clipboard_Clipper_Thengavar Create hunting rule
Author:	Thengavar
Description:	Detects malware manipulating the Windows clipboard for clipping or crypto stealing attacks

Rule name:	WIN_Malware_Unknown_ForgeAuto_2ffc3572 Create hunting rule
Author:	Marjoriefort
Description:	Detects Unknown (pe, etat binaire)

Rule name:	WIN_Malware_Unknown_ForgeAuto_43faefd2 Create hunting rule
Author:	Marjoriefort
Description:	Detects Unknown (pe, etat binaire)

Rule name:	WIN_Malware_Unknown_ForgeAuto_5001c94c Create hunting rule
Author:	Marjoriefort
Description:	Detects Unknown (pe, etat binaire)

Rule name:	WIN_Malware_Unknown_ForgeAuto_74566f98 Create hunting rule
Author:	Marjoriefort
Description:	Detects Unknown (pe, etat binaire)

Rule name:	WIN_Malware_Unknown_ForgeAuto_79234c04 Create hunting rule
Author:	Marjoriefort
Description:	Detects Unknown (pe, etat binaire)

Rule name:	WIN_Malware_Unknown_ForgeAuto_f1079127 Create hunting rule
Author:	Marjoriefort
Description:	Detects Unknown (pe, etat binaire)

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.

No further information available

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