MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 21c2931a57611bb4c8633ec1f75424c271a98629703eee05dfa8f46ef4715536. 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


DCRat


Vendor detections: 15


Intelligence 15 IOCs 1 YARA 10 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 21c2931a57611bb4c8633ec1f75424c271a98629703eee05dfa8f46ef4715536
SHA3-384 hash: 1e8b80324a8594a506b088b7835a0f66223377d8d7282667a7381b94ba9b471994b8aa475f04316d58263cb73e02ec75
SHA1 hash: d89029dc67ea032099e21f25cc33b7fd37e57536
MD5 hash: ba3308fdd43d350a003f06feb193672d
humanhash: whiskey-bakerloo-spring-asparagus
File name:Blockport.exe
Download: download sample
Signature DCRat
Create hunting rule
File size:3'830'272 bytes
First seen:2025-08-16 17:35:12 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'744 x AgentTesla, 19'608 x Formbook, 12'242 x SnakeKeylogger)
ssdeep 98304:GThaFWfRNRWC7Q+mKzV5PMqiWnmRJGBXew8DqVaBXAjn5dz:GThaFijQ+ldimm4OrqV8XA95
TLSH T12206F11A65D24E73C2A45B3145A7023E5390E7623512FB0BB91F60D2A81BBF18B779F3
TrID 67.7% (.EXE) Generic CIL Executable (.NET, Mono, etc.) (73123/4/13)
9.7% (.EXE) Win64 Executable (generic) (10522/11/4)
6.0% (.DLL) Win32 Dynamic Link Library (generic) (6578/25/2)
4.6% (.EXE) Win16 NE executable (generic) (5038/12/1)
4.1% (.EXE) Win32 Executable (generic) (4504/4/1)
Magika pebin
Reporter abuse_ch
Tags:DCRat exe RAT


Avatar
abuse_ch
DCRat C2:
http://542733cm.nyash.es/gameserverdefaultbaseWpPublictempCdncentralUploads.php

Indicators Of Compromise (IOCs)

Below is a list of indicators of compromise (IOCs) associated with this malware samples.

IOCThreatFox Reference
http://542733cm.nyash.es/gameserverdefaultbaseWpPublictempCdncentralUploads.php https://threatfox.abuse.ch/ioc/1570049/

Intelligence

File Origin
# of uploads :
1
# of downloads :
76
Origin country :
NL NL
Vendor Threat Intelligence
Malware family:
dcrat
Create hunting rule
ID:
1
File name:
e5f75369a0948522c1793988085bd758.exe
Verdict:
Malicious activity
Analysis date:
2025-08-16 17:16:52 UTC
Tags:
dcrat rat auto-sch auto-reg remote darkcrystal netreactor stealer susp-powershell wmi-base64 api-base64
Link:
https://app.any.run/tasks/cad70dea-6beb-4bd1-b58b-ca930e24fe35

Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Detection:
n/a
Link:
https://www.capesandbox.com/analysis/21677/
Detection(s):
Sanesecurity.Malware.30425.UnRegNetReactor.UNOFFICIAL
Create hunting rule

Win.Packed.Uztuby-10009381-0
Create hunting rule

Win.Packed.Uztuby-10015486-0
Create hunting rule

Win.Packed.Uztuby-10015902-0
Create hunting rule

Win.Packed.Uztuby-10017372-0
Create hunting rule

Win.Packed.Uztuby-10017373-0
Create hunting rule

Win.Packed.Zusy-10023527-0
Create hunting rule

Win.Dropper.HawkEye-10027238-0
Create hunting rule

Verdict:
Malicious
Score:
92.5%
Link:
https://cyber-fortress.com/docs/result/index.php?id=68a0c1668fd55a79c527f6b6
Tags:
injection spawn sage
Result
Verdict:
Malware
Maliciousness:

Behaviour
Сreating synchronization primitives
DNS request
Creating a file
Creating a file in the Program Files subdirectories
Verdict:
Malicious
Labled as:
Trojan.MSIL.Basic.8
Link:
https://www.hybrid-analysis.com/sample/21c2931a57611bb4c8633ec1f75424c271a98629703eee05dfa8f46ef4715536
Verdict:
Unknown
Link:
https://analyze.intezer.com/analyses/5ec4e4f9-e183-43b7-9a48-add767b3c6ec
Result
Threat name:
DCRat, PureLog Stealer, zgRAT
Create hunting rule
Detection:
malicious
Classification:
spre.troj.spyw.expl.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1758408
Signature
.NET source code contains method to dynamically call methods (often used by packers)
Antivirus / Scanner detection for submitted sample
Antivirus detection for dropped file
Creates an autostart registry key pointing to binary in C:\Windows
Creates an undocumented autostart registry key
Creates multiple autostart registry keys
Creates processes via WMI
Drops executables to the windows directory (C:\Windows) and starts them
Drops PE files with benign system names
Found malware configuration
Infects executable files (exe, dll, sys, html)
Joe Sandbox ML detected suspicious sample
Multi AV Scanner detection for dropped file
Multi AV Scanner detection for submitted file
Queries sensitive Plug and Play Device Information (via WMI, Win32_PnPEntity, often done to detect virtual machines)
Queries sensitive video device information (via WMI, Win32_VideoController, often done to detect virtual machines)
Sample uses string decryption to hide its real strings
Sigma detected: Dot net compiler compiles file from suspicious location
Sigma detected: Files With System Process Name In Unsuspected Locations
Sigma detected: System File Execution Location Anomaly
Suricata IDS alerts for network traffic
Tries to harvest and steal browser information (history, passwords, etc)
Uses ping.exe to check the status of other devices and networks
Uses ping.exe to sleep
Uses schtasks.exe or at.exe to add and modify task schedules
Yara detected DCRat
Yara detected PureLog Stealer
Yara detected zgRAT
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 1758408 Sample: Blockport.exe Startdate: 16/08/2025 Architecture: WINDOWS Score: 100 59 542733cm.nyash.es 2->59 65 Suricata IDS alerts for network traffic 2->65 67 Found malware configuration 2->67 69 Antivirus detection for dropped file 2->69 71 13 other signatures 2->71 8 Blockport.exe 12 54 2->8         started        12 MBWXINzLf46t.exe 14 63 2->12         started        15 explorer.exe 3 2->15         started        17 12 other processes 2->17 signatures3 process4 dnsIp5 43 C:\Windows\assembly\...\MBWXINzLf46t.exe, PE32 8->43 dropped 45 C:\Windows\...\IBKRWdnkZInlXBqAv7F.exe, PE32 8->45 dropped 47 C:\Windows\...\ipXef3IVopCtwd.exe, PE32 8->47 dropped 55 34 other malicious files 8->55 dropped 81 Creates an undocumented autostart registry key 8->81 83 Creates multiple autostart registry keys 8->83 85 Creates an autostart registry key pointing to binary in C:\Windows 8->85 97 3 other signatures 8->97 19 cmd.exe 8->19         started        22 csc.exe 4 8->22         started        25 schtasks.exe 8->25         started        27 17 other processes 8->27 61 542733cm.nyash.es 104.21.30.213, 49694, 49695, 49696 CLOUDFLARENETUS United States 12->61 63 172.67.173.239, 49830, 80 CLOUDFLARENETUS United States 12->63 49 C:\Users\user\Desktop\ymRCegCN.log, PE32 12->49 dropped 51 C:\Users\user\Desktop\wlHukdRi.log, PE32 12->51 dropped 53 C:\Users\user\Desktop\wkfTJxyS.log, PE32 12->53 dropped 57 23 other malicious files 12->57 dropped 87 Multi AV Scanner detection for dropped file 12->87 89 Queries sensitive video device information (via WMI, Win32_VideoController, often done to detect virtual machines) 12->89 91 Queries sensitive Plug and Play Device Information (via WMI, Win32_PnPEntity, often done to detect virtual machines) 12->91 93 Tries to harvest and steal browser information (history, passwords, etc) 12->93 95 Antivirus detection for dropped file 15->95 file6 signatures7 process8 file9 73 Uses ping.exe to sleep 19->73 75 Drops executables to the windows directory (C:\Windows) and starts them 19->75 77 Uses ping.exe to check the status of other devices and networks 19->77 29 conhost.exe 19->29         started        31 chcp.com 19->31         started        33 PING.EXE 19->33         started        35 IBKRWdnkZInlXBqAv7F.exe 19->35         started        41 C:\Windows\...\SecurityHealthSystray.exe, PE32 22->41 dropped 79 Infects executable files (exe, dll, sys, html) 22->79 37 conhost.exe 22->37         started        39 cvtres.exe 1 22->39         started        signatures10 process11
Score:
100%
Verdict:
Malware
File Type:
PE
Link:
https://malprob.io/report/21c2931a57611bb4c8633ec1f75424c271a98629703eee05dfa8f46ef4715536
Verdict:
Malware
YARA:
13 match(es)
Tags:
.Net .Net Obfuscator .Net Reactor Executable Managed .NET PE (Portable Executable) PE File Layout SOS: 0.85 Win 32 Exe x86
Link:
https://app.malva.re/file/ba3308fdd43d350a003f06feb193672d
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/21c2931a57611bb4c8633ec1f75424c271a98629703eee05dfa8f46ef4715536/
Threat name:
ByteCode-MSIL.Trojan.DCRat
Create hunting rule
Status:
Malicious
First seen:
2025-08-12 18:19:23 UTC
File Type:
PE (.Net Exe)
AV detection:
21 of 23 (91.30%)
Threat level:
  5/5
Detection(s):
Malicious file
Link:
https://check.spamhaus.org/check/?searchterm=ehbjggsxmen3jsddh3a7ovbeyjy2tbrjoa7o4bo7vd2g55drku3a._file
Result
Malware family:
dcrat
Create hunting rule
Score:
  10/10
Tags:
family:dcrat execution infostealer persistence rat
Link:
https://tria.ge/reports/250816-v6tn1syqy7/
Behaviour
Modifies registry class
Scheduled Task/Job: Scheduled Task
Suspicious behavior: EnumeratesProcesses
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
Uses Task Scheduler COM API
Enumerates physical storage devices
Drops file in Program Files directory
Drops file in Windows directory
Drops file in System32 directory
Adds Run key to start application
.NET Reactor proctector
Checks computer location settings
Executes dropped EXE
DcRat
Dcrat family
Modifies WinLogon for persistence
Process spawned unexpected child process
Verdict:
Malicious
Tags:
rat dcrat Win.Packed.Uztuby-10009381-0
YARA:
MAL_EXE_DCRat_Jul_08_2
Link:
https://app.threat.zone/submission/04786bc7-5004-42e9-81a8-a3b621bb8fd0
Unpacked files
SH256 hash:
21c2931a57611bb4c8633ec1f75424c271a98629703eee05dfa8f46ef4715536
MD5 hash:
ba3308fdd43d350a003f06feb193672d
SHA1 hash:
d89029dc67ea032099e21f25cc33b7fd37e57536
Detections:
SUSP_OBF_NET_Reactor_Indicators_Jan24
Create hunting rule
INDICATOR_EXE_Packed_DotNetReactor
Create hunting rule
Link:
https://www.unpac.me/results/9f7b6c47-d17b-430e-a61e-cdd2bd64e6f5/
Parent samples :
cf3490aa43bed478680fcaf4cb718d98929b4c6c1f1f235d7187179094eeab7d
21c2931a57611bb4c8633ec1f75424c271a98629703eee05dfa8f46ef4715536
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
iSpy Keylogger
Score:
1.00
Link:
https://yomi.yoroi.company/submissions/21c2931a57611bb4c8633ec1f75424c271a98629703eee05dfa8f46ef4715536

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:DotNet_Reactor
Create hunting rule
Author:@bartblaze
Description:Identifies .NET Reactor, which offers .NET code protection such as obfuscation, encryption and so on.
Rule name:INDICATOR_EXE_Packed_DotNetReactor
Create hunting rule
Author:ditekSHen
Description:Detects executables packed with unregistered version of .NET Reactor
Rule name:MD5_Constants
Create hunting rule
Author:phoul (@phoul)
Description:Look for MD5 constants
Rule name:NET
Create hunting rule
Author:malware-lu
Rule name:pe_imphash
Create hunting rule
Rule name:PureCrypter
Create hunting rule
Author:@bartblaze
Description:Identifies PureCrypter, .NET loader and obfuscator.
Reference:https://malpedia.caad.fkie.fraunhofer.de/details/win.purecrypter
Rule name:Skystars_Malware_Imphash
Create hunting rule
Author:Skystars LightDefender
Description:imphash
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:Sus_Obf_Enc_Spoof_Hide_PE
Create hunting rule
Author:XiAnzheng
Description:Check for Overlay, Obfuscating, Encrypting, Spoofing, Hiding, or Entropy Technique(can create FP)

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/21677/

BLint

The following table provides more information about this file using BLint. BLint is a Binary Linter to check the security properties, and capabilities in executables.

Findings
IDTitleSeverity
CHECK_AUTHENTICODEMissing Authenticodehigh
CHECK_DLL_CHARACTERISTICSMissing dll Security Characteristics (HIGH_ENTROPY_VA)high

Comments