MalwareBazaar Database
You are currently viewing the MalwareBazaar entry for SHA256 4dfa67cc4ff88b2df11c0054e4f15cb80109a69de57b1f3fa9c7dadaee8801e4. 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: 14
| SHA256 hash: | 4dfa67cc4ff88b2df11c0054e4f15cb80109a69de57b1f3fa9c7dadaee8801e4 |
|---|---|
| SHA3-384 hash: | a896d746e96533053d4799323a951ba94546ba7a9ae97cd1e206dd073d4a61a4389aab94c26d928468418d86ee70bdab |
| SHA1 hash: | 6ec2743754d3340c2089f0912b3c8b6e4af6db98 |
| MD5 hash: | c372ec9f63d25b8e7d0ce88a2dfe917b |
| humanhash: | august-fix-mississippi-victor |
| File name: | 4dfa67cc4ff88b2df11c0054e4f15cb80109a69de57b1f3fa9c7dadaee8801e4 |
| Download: | download sample |
| Signature | GuLoader |
| File size: | 934'840 bytes |
| First seen: | 2025-10-09 14:50:34 UTC |
| Last seen: | Never |
| File type: |  exe |
| MIME type: | application/x-dosexec |
| imphash | 9a16e282eba7cc710070c0586c947693 (37 x GuLoader, 15 x RemcosRAT, 11 x VIPKeylogger) |
| ssdeep | 24576:2KIrpKeAZp06GXqK9DIAWawBJ5Y5NHQ/UBcdTp:2zUeAo6vK9D9uBJ52NH+hp |
| TLSH | T103152376B222C4BBE9960BB0A83F96770DA3FD681819575E57827525BF32AF1000F44F |
| 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 | 25391b0b07032991 (2 x GuLoader) |
| Reporter |  adrian__luca |
| Tags: | exe GuLoader signed |
Code Signing Certificate
| Organisation: | Cowflop |
|---|---|
| Issuer: | Cowflop |
| Algorithm: | sha256WithRSAEncryption |
| Valid from: | 2025-08-27T08:23:49Z |
| Valid to: | 2026-08-27T08:23:49Z |
| Serial number: | 21a2c328a925afbebc0916ad729e4e7856c4c1d8 |
| Thumbprint Algorithm: | SHA256 |
| Thumbprint: | 248764db77fa62725072657b1db89bf2672af0ef741b11c0cb4c0372c1673e58 |
| Source: | This information was brought to you by ReversingLabs A1000 Malware Analysis Platform |
Intelligence
File Origin
# of uploads :
1
# of downloads :
75
Origin country :
HUVendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
SATORP AMIRAL Project 2 Saudi Arabia Support_BID_Request-Quotation BCD 20253009.BAT
Verdict:
Malicious activity
Analysis date:
2025-09-30 20:40:35 UTC
Tags:
qrcode
Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Detection:
n/a
Verdict:
Malicious
Score:
99.1%
Tags:
xtreme virus blic
Result
Verdict:
Suspicious
Maliciousness:
Behaviour
Creating a window
Searching for the window
Creating a file in the %temp% subdirectories
Searching for the Windows task manager window
Launching a process
Creating a process with a hidden window
Sending a custom TCP request
Using the Windows Management Instrumentation requests
Creating a file
Verdict:
Likely Malicious
Threat level:
7.5/10
Confidence:
100%
Tags:
adaptive-context installer microsoft_visual_cc obfuscated overlay signed
Verdict:
Malicious
File Type:
exe x32
First seen:
2025-09-23T20:37:00Z UTC
Last seen:
2025-10-08T06:47:00Z UTC
Hits:
~100
Verdict:
Unknown
Result
Threat name:
GuLoader
Detection:
malicious
Classification:
troj.evad
Score:
100 / 100
Signature
AI detected suspicious PE digital signature
Early bird code injection technique detected
Found suspicious powershell code related to unpacking or dynamic code loading
Initial sample is a PE file and has a suspicious name
Joe Sandbox ML detected suspicious sample
Loading BitLocker PowerShell Module
Multi AV Scanner detection for dropped file
Multi AV Scanner detection for submitted file
Powershell drops PE file
Queues an APC in another process (thread injection)
Sample uses process hollowing technique
Sigma detected: Suspicious Script Execution From Temp Folder
Switches to a custom stack to bypass stack traces
Writes to foreign memory regions
Yara detected GuLoader
Behaviour
Behavior Graph:
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
Verdict:
Malicious
Threat:
Trojan.NSIS.Makoob
Threat name:
Win32.Trojan.GuLoader
Status:
Malicious
First seen:
2025-09-23 23:35:06 UTC
File Type:
PE (Exe)
Extracted files:
20
AV detection:
18 of 36 (50.00%)
Threat level:
5/5
Detection(s):
Suspicious file
Result
Malware family:
n/a
Score:
8/10
Tags:
adware discovery execution installer persistence ransomware spyware
Behaviour
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: MapViewOfSection
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
NSIS installer
Command and Scripting Interpreter: PowerShell
Enumerates physical storage devices
System Location Discovery: System Language Discovery
Suspicious use of NtSetInformationThreadHideFromDebugger
Loads dropped DLL
Verdict:
Malicious
Tags:
loader guloader
YARA:
NSIS_GuLoader_July_2024
Unpacked files
SH256 hash:
4dfa67cc4ff88b2df11c0054e4f15cb80109a69de57b1f3fa9c7dadaee8801e4
MD5 hash:
c372ec9f63d25b8e7d0ce88a2dfe917b
SHA1 hash:
6ec2743754d3340c2089f0912b3c8b6e4af6db98
SH256 hash:
7229e483771d3b833e68ac582c99a57dfaef7e6aa7aacc5faedacaf2d9d203b0
MD5 hash:
6ba011498156f594d1345fa85831d120
SHA1 hash:
7dfc87657ea941d2b8bc2965d5861cdedac1ee7b
SH256 hash:
7853be9190489ba84dae8232e9a967cec02d941732cb4137bc9ae6a392e89fb8
MD5 hash:
3fbd78c889fa40a2e5567b980c57b7db
SHA1 hash:
303564bfa6fd5ab7a65d35ae1cd14a05643b6b5d
SH256 hash:
a44ca08afb3f6bafd76aa35c259f3d599fe34f6f49ea5118626c1c1a540b0f03
MD5 hash:
81e268e27dbbcadbf116b5a9402195ab
SHA1 hash:
bd2b701b2e5e279786e179bceee2dc132a2afc37
SH256 hash:
e20666c498941d36bfd0eae411ad73c475d043cee39b50c31734a70eecaae0bb
MD5 hash:
13bd8e89dc79004d85ab02626e08c3c5
SHA1 hash:
0ef0efb3237233de26f55c4420753ed0fed418ad
Malware family:
GuLoader
Verdict:
Malicious
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: | Ins_NSIS_Buer_Nov_2020_1 |
|---|---|
| Author: | Arkbird_SOLG |
| Description: | Detect NSIS installer used for Buer loader |
| Rule name: | PE_Digital_Certificate |
|---|---|
| Author: | albertzsigovits |
| Rule name: | shellcode |
|---|---|
| Author: | nex |
| Description: | Matched shellcode byte patterns |
File information
The table below shows additional information about this malware sample such as delivery method and external references.
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