MalwareBazaar Database
You are currently viewing the MalwareBazaar entry for SHA256 b303d73e3c93e65c66ce7d1dc9c97fd39fb71d490b91588e59b2a677e17c3cdd. 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
GuLoader
Vendor detections: 16
| SHA256 hash: | b303d73e3c93e65c66ce7d1dc9c97fd39fb71d490b91588e59b2a677e17c3cdd |
|---|---|
| SHA3-384 hash: | 7eadf0217b537e01f4a3d36524a46a69eed6b2e6752039eefb6dd277e667e304911c8a7c2b0b0014f84a0c15de839b4a |
| SHA1 hash: | ac519a1fe1d2b1fb8f7c8bd85b43505f569055d9 |
| MD5 hash: | 1aa04f395aaa12484b509fa3f1731bcb |
| humanhash: | four-indigo-december-fish |
| File name: | b303d73e3c93e65c66ce7d1dc9c97fd39fb71d490b91588e59b2a677e17c3cdd |
| Download: | download sample |
| Signature | GuLoader |
| File size: | 373'456 bytes |
| First seen: | 2026-02-04 15:41:44 UTC |
| Last seen: | 2026-02-04 16:41:28 UTC |
| File type: |  exe |
| MIME type: | application/x-dosexec |
| imphash | 4ea4df5d94204fc550be1874e1b77ea7 (242 x GuLoader, 29 x RemcosRAT, 17 x VIPKeylogger) |
| ssdeep | 6144:uB+pgU1Kl8Ga/j4jO3mvABRp0mP+YCgv/UihJrdsgbKdYgu/oTU0h8d9:ugn7hCuUiRs3E/oT/h4 |
| Threatray | 2'662 similar samples on MalwareBazaar |
| TLSH | T134848C512266DC63E39492B4415AE77E8A71FA8A2D31C33726F1ED9FB618F323C18351 |
| TrID | 47.3% (.EXE) Win32 Executable MS Visual C++ (generic) (31206/45/13) 15.9% (.EXE) Win64 Executable (generic) (10522/11/4) 9.9% (.DLL) Win32 Dynamic Link Library (generic) (6578/25/2) 7.6% (.EXE) Win16 NE executable (generic) (5038/12/1) 6.8% (.EXE) Win32 Executable (generic) (4504/4/1) |
| Magika | pebin |
| Reporter |  Neiki |
| Tags: | exe GuLoader remcos signed |
Code Signing Certificate
| Organisation: | Disozonise |
|---|---|
| Issuer: | Disozonise |
| Algorithm: | sha256WithRSAEncryption |
| Valid from: | 2026-02-02T07:33:12Z |
| Valid to: | 2027-02-02T07:33:12Z |
| Serial number: | 6bc98ca1ba160e723183ccdbd599e77219c67ce9 |
| Thumbprint Algorithm: | SHA256 |
| Thumbprint: | 474da6326f182e7cc7ad08347c96f46b3773fa4c1aa564d480a7e3e81b96b976 |
| Source: | This information was brought to you by ReversingLabs A1000 Malware Analysis Platform |
Intelligence
File Origin
# of uploads :
2
# of downloads :
176
Origin country :
DEVendor Threat Intelligence
Malware configuration found for:
GuLoader
NSIS
Details
GuLoader
a c2 URL, a useragent string, and a string XOR key
GuLoader
an XOR decryption key and an extracted component
NSIS
extracted archive contents
Malware family:
remcos
ID:
1
File name:
SNE-20260202.exe
Verdict:
Malicious activity
Analysis date:
2026-02-04 06:10:15 UTC
Tags:
remcos rat remote
Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Detection:
n/a
Verdict:
Malicious
Score:
70%
Tags:
injection obfusc overt
Verdict:
Unknown
Threat level:
2.5/10
Confidence:
100%
Tags:
adaptive-context anti-debug blackhole installer installer installer-heuristic microsoft_visual_cc nsis signed soft-404
Verdict:
Malicious
Labled as:
TR/AD.Nekark
Result
Gathering data
Verdict:
Malicious
File Type:
exe x32
Detections:
HEUR:Trojan.Win32.Guloader.gen Trojan-Downloader.Win32.Minix.sb Trojan.Win32.Guloader.sb Trojan.NSIS.Makoob.sbc Trojan.NSIS.Makoob.sba HEUR:Trojan.NSIS.GuLoader.gen Backdoor.Win32.Remcos.sb
Malware family:
NSIS
Verdict:
Unknown
Score:
75%
Verdict:
Malware
File Type:
PE
Verdict:
inconclusive
YARA:
5 match(es)
Tags:
Executable NSIS Installer PE (Portable Executable) PE File Layout Win 32 Exe x86
Verdict:
Malicious
Threat:
Family.REMCOS
Threat name:
Win32.Trojan.Guloader
Status:
Malicious
First seen:
2026-02-04 06:37:12 UTC
File Type:
PE (Exe)
Extracted files:
7
AV detection:
12 of 36 (33.33%)
Threat level:
5/5
Detection(s):
Malicious file
Verdict:
malicious
Label(s):
cloudeye
Similar samples:
+ 2'652 additional samples on MalwareBazaar
Result
Malware family:
remcos
Score:
10/10
Tags:
family:remcos botnet:remotehost collection discovery rat
Behaviour
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: MapViewOfSection
Suspicious use of AdjustPrivilegeToken
Suspicious use of SetWindowsHookEx
Suspicious use of WriteProcessMemory
Enumerates physical storage devices
System Location Discovery: System Language Discovery
Drops file in Windows directory
Suspicious use of NtCreateThreadExHideFromDebugger
Suspicious use of NtSetInformationThreadHideFromDebugger
Suspicious use of SetThreadContext
Accesses Microsoft Outlook accounts
Contacts third-party web service commonly abused for C2
Loads dropped DLL
Detected Nirsoft tools
NirSoft MailPassView
Remcos
Remcos family
Malware Config
C2 Extraction:
158.94.210.31:2404
Unpacked files
SH256 hash:
b303d73e3c93e65c66ce7d1dc9c97fd39fb71d490b91588e59b2a677e17c3cdd
MD5 hash:
1aa04f395aaa12484b509fa3f1731bcb
SHA1 hash:
ac519a1fe1d2b1fb8f7c8bd85b43505f569055d9
SH256 hash:
2e226715419a5882e2e14278940ee8ef0aa648a3ef7af5b3dc252674111962bc
MD5 hash:
a4dd044bcd94e9b3370ccf095b31f896
SHA1 hash:
17c78201323ab2095bc53184aa8267c9187d5173
Malware family:
Remcos
Verdict:
Malicious
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Suspicious File
Score:
0.52
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: | Detect_NSIS_Nullsoft_Installer |
|---|---|
| Author: | Obscurity Labs LLC |
| Description: | Detects NSIS installers by .ndata section + NSIS header string |
| Rule name: | PE_Digital_Certificate |
|---|---|
| Author: | albertzsigovits |
File information
The table below shows additional information about this malware sample such as delivery method and external references.
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