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MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 f2231fd951b93861bb0e6ce50e4c5525b452ca9384caa36b3abbed7c5abbd101. 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: 15


Intelligence 15 IOCs YARA 3 File information Comments

SHA256 hash: f2231fd951b93861bb0e6ce50e4c5525b452ca9384caa36b3abbed7c5abbd101
SHA3-384 hash: 9cd66f3d28ccd47221898cd98342e4cf8ac1a7e942392d702f61b7855b10060d83a7a44629a126bf9278535bcd09c4ee
SHA1 hash: 03ecbdf039173815da68a8e8ae877e7f0cf75778
MD5 hash: 05aa8d5bbbf7f4c1df1fd23f2c2a7998
humanhash: oranges-autumn-echo-carolina
File name:po-30039949-484875785.exe
Download: download sample
Signature GuLoader
File size:672'944 bytes
First seen:2025-09-29 07:00:13 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash 6e7f9a29f2c85394521a08b9f31f6275 (326 x GuLoader, 65 x AgentTesla, 63 x RemcosRAT)
ssdeep 12288:QMwZ4Kt8BifVohVD1ImYZy+NFwJFK8V51ebDymMP/:QMw6ifWIxpNFwJFTBmMH
Threatray 1'796 similar samples on MalwareBazaar
TLSH T1B9E402142FAECE0AF1874D305F36E55BD1759C011D6A2B43AF223D8C5A7E7C8764E252
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 70e0ba9bdbdbc220 (2 x GuLoader, 1 x AgentTesla)
Reporter adrian__luca
Tags:exe GuLoader signed

Code Signing Certificate

Organisation:Thwack
Issuer:Thwack
Algorithm:sha256WithRSAEncryption
Valid from:2025-08-16T07:39:16Z
Valid to:2026-08-16T07:39:16Z
Serial number: 6a49010273e8a7ba8fa5917c8febe2be36bb05a8
Thumbprint Algorithm:SHA256
Thumbprint: 63fdc256f73526d46e4a94436eaa7375de3e4fb60f6d8fff6bd1be9efaa61011
Source:This information was brought to you by ReversingLabs A1000 Malware Analysis Platform

Intelligence


File Origin
# of uploads :
1
# of downloads :
157
Origin country :
HU HU
Vendor Threat Intelligence
Malware family:
agenttesla
ID:
1
File name:
po-30039949-484875785.exe
Verdict:
Malicious activity
Analysis date:
2025-09-29 07:25:11 UTC
Tags:
stealer evasion agenttesla ftp exfiltration

Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Verdict:
Malicious
Score:
99.1%
Tags:
obfuscate xtreme virus nsis
Result
Verdict:
Suspicious
Maliciousness:

Behaviour
Creating a window
Searching for the window
Creating a file
Launching a process
Creating a process with a hidden window
Sending a custom TCP request
Using the Windows Management Instrumentation requests
Verdict:
Suspicious
Threat level:
  5/10
Confidence:
100%
Tags:
adaptive-context installer microsoft_visual_cc obfuscated overlay phishing signed
Verdict:
Malicious
File Type:
exe x32
First seen:
2025-09-23T03:17:00Z UTC
Last seen:
2025-09-23T03:17:00Z UTC
Hits:
~1000
Detections:
VHO:Trojan.NSIS.Convagent.gen HEUR:Trojan.NSIS.Kryptik.gen Trojan.NSIS.Makoob.sba
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:
2025-09-29 07:14:17 UTC
File Type:
PE (Exe)
Extracted files:
6
AV detection:
20 of 38 (52.63%)
Threat level:
  5/5
Result
Malware family:
agenttesla
Score:
  10/10
Tags:
family:agenttesla discovery keylogger spyware stealer trojan
Behaviour
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: MapViewOfSection
Suspicious use of AdjustPrivilegeToken
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
Badlisted process makes network request
Looks up external IP address via web service
Checks computer location settings
AgentTesla
Agenttesla family
Unpacked files
SH256 hash:
f2231fd951b93861bb0e6ce50e4c5525b452ca9384caa36b3abbed7c5abbd101
MD5 hash:
05aa8d5bbbf7f4c1df1fd23f2c2a7998
SHA1 hash:
03ecbdf039173815da68a8e8ae877e7f0cf75778
Please note that we are no longer able to provide a coverage score for Virus Total.

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:CP_AllMal_Detector
Author:DiegoAnalytics
Description:CrossPlatform All Malwares Detector: Detect PE, ELF, Mach-O, scripts, archives; overlay, obfuscation, encryption, spoofing, hiding, high entropy, network communication
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

GuLoader

Executable exe f2231fd951b93861bb0e6ce50e4c5525b452ca9384caa36b3abbed7c5abbd101

(this sample)

  
Delivery method
Distributed via e-mail attachment

Comments