MalwareBazaar Database
You are currently viewing the MalwareBazaar entry for SHA256 fbe7554867d49dbfa125b8d9355f345319536cbc4016948d4fff8ff0c4fa0b9f. 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: 13
| SHA256 hash: | fbe7554867d49dbfa125b8d9355f345319536cbc4016948d4fff8ff0c4fa0b9f |
|---|---|
| SHA3-384 hash: | 1021719a0f8377df9d901209e21ce383e53895e571dc7d75ab5faa89aa4c3285845e6aaf0ec7351d3b5cb456a8bef54f |
| SHA1 hash: | d5ccbb5c2130a0fd88bc109ad11db9897017343f |
| MD5 hash: | c33e33d2373ea77fff877873f3036713 |
| humanhash: | mockingbird-uranus-stream-ink |
| File name: | Proforma Invoice.exe |
| Download: | download sample |
| Signature | GuLoader |
| File size: | 437'208 bytes |
| First seen: | 2025-12-02 08:47:54 UTC |
| Last seen: | Never |
| File type: |  exe |
| MIME type: | application/x-dosexec |
| imphash | 573bb7b41bc641bd95c0f5eec13c233b (66 x GuLoader, 32 x AgentTesla, 31 x RemcosRAT) |
| ssdeep | 12288:/+Uef4GF4qvYpb9MgJnE+dW/g/6sJsghiyl/+Gfe28:/+pJF4gYpqgJnE+I/g/6sJs0/MGfep |
| TLSH | T1389402C5F6A1A1E7F031487F152ACFB20AA77F751111D3222664F72F2972292EA33653 |
| 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 |
| dhash icon | 71dccccccccee878 (4 x RemcosRAT, 1 x GuLoader) |
| Reporter |  adrian__luca |
| Tags: | exe GuLoader signed |
Code Signing Certificate
| Organisation: | Neurasthenic |
|---|---|
| Issuer: | Neurasthenic |
| Algorithm: | sha256WithRSAEncryption |
| Valid from: | 2025-11-18T02:18:50Z |
| Valid to: | 2026-11-18T02:18:50Z |
| Serial number: | 42c3622cbabd6bd8c9f1c18941d4f47db6143d3a |
| Thumbprint Algorithm: | SHA256 |
| Thumbprint: | d1153a122aa8014837e1a1927907e684911f9c6b1fe41170843051701cbad81b |
| Source: | This information was brought to you by ReversingLabs A1000 Malware Analysis Platform |
Intelligence
File Origin
# of uploads :
1
# of downloads :
135
Origin country :
HUVendor Threat Intelligence
Malware configuration found for:
GuLoader
NSIS
Details
GuLoader
an XOR decryption key and an extracted component
GuLoader
a c2 URL, a useragent string, and a string XOR key
NSIS
extracted archive contents
Malware family:
remcos
ID:
1
File name:
Proforma Invoice.exe
Verdict:
Malicious activity
Analysis date:
2025-12-02 08:48:52 UTC
Tags:
remcos rat auto-reg
Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Detection:
n/a
Verdict:
Malicious
Score:
93.3%
Tags:
injection virus blic
Verdict:
Likely Malicious
Threat level:
7.5/10
Confidence:
100%
Tags:
adaptive-context anti-debug blackhole installer installer installer-heuristic masquerade microsoft_visual_cc nsis overlay signed
Verdict:
Malicious
File Type:
exe x32
First seen:
2025-11-27T18:36:00Z UTC
Last seen:
2025-12-04T07:08:00Z UTC
Hits:
~1000
Detections:
Trojan.NSIS.Makoob.sbb Trojan.NSIS.Makoob.sba Trojan.NSIS.GuLoader.o VHO:Trojan.NSIS.GuLoader.gen Trojan-Downloader.Win32.Minix.sb Trojan.Win32.Guloader.sb
Verdict:
Suspicious
Score:
99%
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
Threat name:
Win32.Trojan.Guloader
Status:
Malicious
First seen:
2025-11-27 21:48:38 UTC
File Type:
PE (Exe)
Extracted files:
19
AV detection:
25 of 38 (65.79%)
Threat level:
5/5
Detection(s):
Suspicious file
Result
Malware family:
remcos
Score:
10/10
Tags:
family:guloader family:remcos botnet:remotehost discovery downloader macos persistence rat
Behaviour
Suspicious behavior: MapViewOfSection
Suspicious use of WriteProcessMemory
Enumerates physical storage devices
System Location Discovery: System Language Discovery
Drops file in Program Files directory
Drops file in Windows directory
Drops file in System32 directory
Suspicious use of NtCreateThreadExHideFromDebugger
Suspicious use of NtSetInformationThreadHideFromDebugger
Adds Run key to start application
Legitimate hosting services abused for malware hosting/C2
Checks computer location settings
Executes dropped EXE
Loads dropped DLL
Guloader family
Guloader,Cloudeye
Remcos
Remcos family
Malware Config
C2 Extraction:
107.173.227.99:2404
Verdict:
Suspicious
Tags:
n/a
YARA:
n/a
Unpacked files
SH256 hash:
fbe7554867d49dbfa125b8d9355f345319536cbc4016948d4fff8ff0c4fa0b9f
MD5 hash:
c33e33d2373ea77fff877873f3036713
SHA1 hash:
d5ccbb5c2130a0fd88bc109ad11db9897017343f
SH256 hash:
8b4c47c4cf5e76ec57dd5a050d5acd832a0d532ee875d7b44f6cdaf68f90d37c
MD5 hash:
9b38a1b07a0ebc5c7e59e63346ecc2db
SHA1 hash:
97332a2ffcf12a3e3f27e7c05213b5d7faa13735
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Malicious File
Score:
1.00
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.
Malspam
Delivery method
Distributed via e-mail attachment
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