MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 4252f52d1291b071cac6435be0f1ab88ecc64d7797def81f495d3af759ecdc22. 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 23 File information Comments
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SHA256 hash: 4252f52d1291b071cac6435be0f1ab88ecc64d7797def81f495d3af759ecdc22
SHA3-384 hash: fde929e64bed1bf5b4755ce37a1c55420936f1d2fab9e50537f98a8ed182bf5a905cdc1504eba99a02e2db96d5b07669
SHA1 hash: 5f7ef544b36713f4ff3dc73a647373522f5e27a2
MD5 hash: 737006cfc1afd38c5a7e903bd7b29122
humanhash: mike-chicken-sad-montana
File name:FedEx documents.vbs
Download: download sample
Signature RemcosRAT
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File size:1'076'692 bytes
First seen:2025-09-27 12:31:07 UTC
Last seen:Never
File type:Visual Basic Script (vbs) vbs
MIME type:text/plain
ssdeep 12288:0Av1Yek1dYfYdUdEHDbCValRZoeUNggDAzaoRcRWDTTeDOUtrIKiin/9z/4tU:71foYSUaDVHZrHsAzaJRs26Ut8Kp16U
Threatray 81 similar samples on MalwareBazaar
TLSH T19935ADEA6DD61FA60A501FFB22F11CDF1D918292F604E198B9917CE0631223D5F7C6AC
Magika vba
Reporter abuse_ch
Tags:FedEx RAT RemcosRAT vbs

Intelligence

File Origin
# of uploads :
1
# of downloads :
71
Origin country :
SE SE
Vendor Threat Intelligence
Detection:
n/a
Link:
https://www.capesandbox.com/analysis/29246/
Detection(s):
SecuriteInfo.com.BAT.Shell-1.UNOFFICIAL
Create hunting rule

Verdict:
Malicious
Score:
92.5%
Link:
https://cyber-fortress.com/docs/result/index.php?id=68d7d93591dd51f6514f253d
Tags:
obfuscate xtreme shell lien
Verdict:
Malicious
Threat level:
  10/10
Confidence:
100%
Tags:
base64 evasive masquerade obfuscated powershell
Link:
https://www.filescan.io/uploads/68d7d93674e5a2898995e946/reports/9e3652ab-3cff-40ce-872d-759811f7402f/overview
Verdict:
Unknown
Link:
https://www.hybrid-analysis.com/sample/4252f52d1291b071cac6435be0f1ab88ecc64d7797def81f495d3af759ecdc22
Verdict:
Malicious
File Type:
vbs
First seen:
2025-09-26T04:42:00Z UTC
Last seen:
2025-09-26T04:42:00Z UTC
Hits:
~1000
Detections:
Trojan.PowerShell.AmsiBypass.sb Trojan.JS.SAgent.sb HEUR:Trojan.VBS.SAgent.gen Trojan.BAT.Agent.sb PDM:Trojan.Win32.Generic HEUR:Trojan.BAT.Tesre.gen HEUR:Trojan.Script.Generic HEUR:Trojan.PowerShell.Tesre.sb Trojan-Downloader.JS.Cryptoload.sb
Link:
https://opentip.kaspersky.com/4252f52d1291b071cac6435be0f1ab88ecc64d7797def81f495d3af759ecdc22/results?tab=lookup
Result
Threat name:
Remcos
Create hunting rule
Detection:
malicious
Classification:
phis.troj.spyw.expl.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1785166
Signature
.NET source code contains a sample name check
.NET source code references suspicious native API functions
Antivirus detection for dropped file
Attempt to bypass Chrome Application-Bound Encryption
C2 URLs / IPs found in malware configuration
Contains functionality to bypass UAC (CMSTPLUA)
Contains functionality to steal Chrome passwords or cookies
Contains functionality to steal Firefox passwords or cookies
Creates processes via WMI
Detected Remcos RAT
Found hidden mapped module (file has been removed from disk)
Found malware configuration
Found suspicious powershell code related to unpacking or dynamic code loading
Joe Sandbox ML detected suspicious sample
Loading BitLocker PowerShell Module
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 dropped file
Multi AV Scanner detection for submitted file
Powershell drops PE file
Sigma detected: Base64 Encoded PowerShell Command Detected
Sigma detected: Potential Data Stealing Via Chromium Headless Debugging
Sigma detected: PowerShell Base64 Encoded FromBase64String Cmdlet
Sigma detected: PowerShell Base64 Encoded IEX Cmdlet
Sigma detected: Remcos
Sigma detected: Windows Shell/Scripting Application File Write to Suspicious Folder
Sigma detected: WScript or CScript Dropper
Suricata IDS alerts for network traffic
Suspicious execution chain found
Suspicious powershell command line found
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)
Windows Scripting host queries suspicious COM object (likely to drop second stage)
Writes to foreign memory regions
Wscript starts Powershell (via cmd or directly)
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: 1785166 Sample: FedEx documents.vbs Startdate: 27/09/2025 Architecture: WINDOWS Score: 100 63 api.ipify.org 2->63 65 api.findip.net 2->65 73 Suricata IDS alerts for network traffic 2->73 75 Found malware configuration 2->75 77 Malicious sample detected (through community Yara rule) 2->77 79 17 other signatures 2->79 12 wscript.exe 1 2->12         started        16 svchost.exe 1 1 2->16         started        signatures3 process4 dnsIp5 51 C:\Users\Public\SiloCenter8892.bat, ASCII 12->51 dropped 97 Wscript starts Powershell (via cmd or directly) 12->97 99 Windows Scripting host queries suspicious COM object (likely to drop second stage) 12->99 101 Suspicious execution chain found 12->101 103 Creates processes via WMI 12->103 19 cmd.exe 1 12->19         started        61 127.0.0.1 unknown unknown 16->61 file6 signatures7 process8 signatures9 81 Suspicious powershell command line found 19->81 83 Wscript starts Powershell (via cmd or directly) 19->83 22 cmd.exe 1 19->22         started        24 conhost.exe 19->24         started        process10 process11 26 cmd.exe 2 22->26         started        signatures12 93 Suspicious powershell command line found 26->93 95 Wscript starts Powershell (via cmd or directly) 26->95 29 powershell.exe 14 50 26->29         started        34 conhost.exe 26->34         started        process13 dnsIp14 67 198.23.177.209, 49716, 49717, 49718 AS-COLOCROSSINGUS United States 29->67 69 api.findip.net 104.21.93.189, 443, 49722 CLOUDFLARENETUS United States 29->69 71 api.ipify.org 172.67.74.152, 443, 49720 CLOUDFLARENETUS United States 29->71 53 C:\Users\user\AppData\Local\Temp\TH322E.tmp, MS-DOS 29->53 dropped 55 C:\Users\user\AppData\Local\Temp\TH3143.tmp, PE32+ 29->55 dropped 57 C:\Users\user\AppData\Local\Temp\TH2FBB.tmp, MS-DOS 29->57 dropped 59 2 other malicious files 29->59 dropped 105 Contains functionality to bypass UAC (CMSTPLUA) 29->105 107 Detected Remcos RAT 29->107 109 Attempt to bypass Chrome Application-Bound Encryption 29->109 111 10 other signatures 29->111 36 RmClient.exe 1 29->36         started        39 RmClient.exe 2 29->39         started        41 RmClient.exe 1 29->41         started        43 2 other processes 29->43 file15 signatures16 process17 signatures18 85 Tries to steal Instant Messenger accounts or passwords 36->85 87 Tries to steal Mail credentials (via file / registry access) 36->87 89 Tries to steal Mail credentials (via file registry) 39->89 91 Tries to harvest and steal browser information (history, passwords, etc) 39->91 45 WerFault.exe 21 43->45         started        47 conhost.exe 43->47         started        49 msedge.exe 43->49         started        process19
Score:
99%
Verdict:
Malware
File Type:
SCRIPT
Link:
https://malprob.io/report/4252f52d1291b071cac6435be0f1ab88ecc64d7797def81f495d3af759ecdc22
Gathering data
Detection:
remcos
Create hunting rule
Link:
https://mwdb.cert.pl/sample/4252f52d1291b071cac6435be0f1ab88ecc64d7797def81f495d3af759ecdc22/
Verdict:
Malicious
Threat:
Trojan.JS.Cryptoload
Link:
https://tip.neiki.dev/file/4252f52d1291b071cac6435be0f1ab88ecc64d7797def81f495d3af759ecdc22
Threat name:
Win32.Backdoor.Remcos
Create hunting rule
Status:
Malicious
First seen:
2025-09-26 12:47:25 UTC
File Type:
Text
AV detection:
11 of 38 (28.95%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=ijjpklissgyhdswginn6b4nlrdwmmtlxs7ppqh2jlu5powpm3qra._file
Verdict:
malicious
Label(s):
admintool_mailpassview
Create hunting rule
remcos
Create hunting rule
donut_injector
Create hunting rule
nirsoft
Create hunting rule
Similar samples:
0660741f7d4b1e5d29d281abbbcdda47eed2cd899227f2b787dc89e5b628cb82
RemcosRAT
879ebda15ee112aeb9ab2af26cf2cd59967cd64ced4fdafc3e571caf100ea5f9
RemcosRAT
8f4cb5ddc22fbf3f8118eaa14c1cbb7aae10ba6b65ff44cb2345b10f2eb48304
RemcosRAT
cae151fa658bb748d0df462d04cf0aa1b6f06c25de363fa0c6080369c0c2aa97
RemcosRAT
e1a0ab5cadb0af718230bb8f907c649a313f1ff7bcbed6745c678811ce8a4465
RemcosRAT
e2a70b214b0d1f0a2f22955d257fa2189e1c9108987248ec44a30b2fe717a386
RemcosRAT
e80861f2196fcab3985e686094a14beb8bfbf6ebda37b466d9f514f4dec86b12
RemcosRAT
error
RemcosRAT
+ 71 additional samples on MalwareBazaar
Result
Malware family:
n/a
Score:
  10/10
Tags:
collection credential_access discovery execution stealer
Link:
https://tria.ge/reports/250927-pqdpzack3y/
Behaviour
Checks processor information in registry
Enumerates system info in registry
Modifies registry class
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: NtCreateUserProcessBlockNonMicrosoftBinary
Suspicious use of AdjustPrivilegeToken
Suspicious use of FindShellTrayWindow
Suspicious use of SendNotifyMessage
Suspicious use of WriteProcessMemory
System Location Discovery: System Language Discovery
Drops file in Windows directory
Suspicious use of SetThreadContext
Accesses Microsoft Outlook accounts
Command and Scripting Interpreter: PowerShell
Looks up external IP address via web service
Badlisted process makes network request
Uses browser remote debugging
Detected Nirsoft tools
NirSoft MailPassView
NirSoft WebBrowserPassView
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/4252f52d1291b071cac6435be0f1ab88ecc64d7797def81f495d3af759ecdc22

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
Create hunting rule
Author:cip
Description:Attempts to match at least some of the strings used in some botnet variants which use plaintext communication protocols.
Rule name:ClamAV_Emotet_String_Aggregate
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_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: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:SUSP_PS1_JAB_Pattern_Jun22_1
Create hunting rule
Author:Florian Roth (Nextron Systems)
Description:Detects suspicious UTF16 and Base64 encoded PowerShell code that starts with a $ sign and a single char variable
Reference:Internal Research
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_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.

Cape
Cape
https://www.capesandbox.com/analysis/29246/

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