MalwareBazaar Database
You are currently viewing the MalwareBazaar entry for SHA256 5d591a75948b681ed5bfce020a53431b48aa5fe3ff761d28c8158759dc1c393e. 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: 12
| SHA256 hash: | 5d591a75948b681ed5bfce020a53431b48aa5fe3ff761d28c8158759dc1c393e |
|---|---|
| SHA3-384 hash: | 7cf2a0ca7db70d9a61891fe11e3b92838af3468fbc38fad6cd7802f423882cf039dbadf081aac44a55dcf5d68c241e2d |
| SHA1 hash: | 220653fbcaf48ccd39fd0506d3bef36615dda70b |
| MD5 hash: | a3d298cec1789cb9b3d3f22ff9b5b9ec |
| humanhash: | alanine-oregon-twelve-shade |
| File name: | 5d591a75948b681ed5bfce020a53431b48aa5fe3ff761d28c8158759dc1c393e |
| Download: | download sample |
| Signature | GuLoader |
| File size: | 806'400 bytes |
| First seen: | 2026-02-05 15:48:06 UTC |
| Last seen: | Never |
| File type: |  exe |
| MIME type: | application/x-dosexec |
| imphash | e2f3f8ec66b7e1900c37978aca89d3c5 (24 x GuLoader, 6 x RemcosRAT, 4 x AgentTesla) |
| ssdeep | 12288:3qNb6hgmWbp2Lxt8dJD0CvXime9zAlHCaaIk/Je5hgofKZECOJ:Gb6K5bpSxt+VvvSF9zc+cXg9Q |
| Threatray | 2'545 similar samples on MalwareBazaar |
| TLSH | T19F05020F3278C06CCAF81EB0F46AADF1055E6C04ACA9548D6BD5B3DEA6F62F1531A507 |
| 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 | 01b333b6cec6ce00 (9 x GuLoader, 2 x PhantomStealer) |
| Reporter |  adrian__luca |
| Tags: | exe GuLoader signed |
Code Signing Certificate
| Organisation: | lexological |
|---|---|
| Issuer: | lexological |
| Algorithm: | sha256WithRSAEncryption |
| Valid from: | 2025-12-10T09:45:03Z |
| Valid to: | 2026-12-10T09:45:03Z |
| Serial number: | 63e6ec282a6f461b4efe8b62e03c29d73b382c7a |
| Thumbprint Algorithm: | SHA256 |
| Thumbprint: | ff3d9daf0c590ccd56d8ebf8f590e9d500079c7c549c33098ed29a84c267fd5d |
| Source: | This information was brought to you by ReversingLabs A1000 Malware Analysis Platform |
Intelligence
File Origin
# of uploads :
1
# of downloads :
139
Origin country :
HUVendor Threat Intelligence
Malware configuration found for:
NSIS
Details
Malware family:
n/a
ID:
1
File name:
5d591a75948b681ed5bfce020a53431b48aa5fe3ff761d28c8158759dc1c393e
Verdict:
Malicious activity
Analysis date:
2026-02-05 21:59:02 UTC
Tags:
n/a
Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Detection:
n/a
Verdict:
Malicious
Score:
96.5%
Tags:
injection obfusc virus
Verdict:
Malicious
File Type:
exe x32
First seen:
2026-01-27T19:59:00Z UTC
Last seen:
2026-02-07T10:10:00Z UTC
Hits:
~1000
Verdict:
Malicious
Score:
99%
Verdict:
Malware
File Type:
PE
Gathering data
Detection:
agenttesla
Threat name:
Win32.Spyware.Negasteal
Status:
Suspicious
First seen:
2026-01-28 00:02:21 UTC
File Type:
PE (Exe)
Extracted files:
32
AV detection:
25 of 36 (69.44%)
Threat level:
2/5
Detection(s):
Suspicious file
Verdict:
malicious
Label(s):
cloudeye
Similar samples:
+ 2'535 additional samples on MalwareBazaar
Result
Malware family:
agenttesla
Score:
10/10
Tags:
family:agenttesla discovery installer keylogger spyware stealer trojan
Behaviour
Suspicious behavior: MapViewOfSection
Suspicious use of WriteProcessMemory
Enumerates physical storage devices
Program crash
System Location Discovery: System Language Discovery
Drops file in Program Files directory
Suspicious use of NtSetInformationThreadHideFromDebugger
Contacts third-party web service commonly abused for C2
Loads dropped DLL
AgentTesla
Agenttesla family
Unpacked files
SH256 hash:
5d591a75948b681ed5bfce020a53431b48aa5fe3ff761d28c8158759dc1c393e
MD5 hash:
a3d298cec1789cb9b3d3f22ff9b5b9ec
SHA1 hash:
220653fbcaf48ccd39fd0506d3bef36615dda70b
SH256 hash:
7853be9190489ba84dae8232e9a967cec02d941732cb4137bc9ae6a392e89fb8
MD5 hash:
3fbd78c889fa40a2e5567b980c57b7db
SHA1 hash:
303564bfa6fd5ab7a65d35ae1cd14a05643b6b5d
SH256 hash:
a44ca08afb3f6bafd76aa35c259f3d599fe34f6f49ea5118626c1c1a540b0f03
MD5 hash:
81e268e27dbbcadbf116b5a9402195ab
SHA1 hash:
bd2b701b2e5e279786e179bceee2dc132a2afc37
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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