MalwareBazaar Database
You are currently viewing the MalwareBazaar entry for SHA256 4a6b8d26d298279a62f2a27aa6a8a9b67db22a2195f9e4de3c19dccb0a0f8126. 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: | 4a6b8d26d298279a62f2a27aa6a8a9b67db22a2195f9e4de3c19dccb0a0f8126 |
|---|---|
| SHA3-384 hash: | 8d5d80be5377f01d0acc94be0427c1982c2400068d6199a01f0be92526f8326506d42e9d3e2787d9b3163ef514f426f5 |
| SHA1 hash: | 007386fadca47afbe5632420c46f658a978eb688 |
| MD5 hash: | f46329e59f449cdcd96a1d78b4e96f59 |
| humanhash: | louisiana-happy-montana-mockingbird |
| File name: | 4a6b8d26d298279a62f2a27aa6a8a9b67db22a2195f9e4de3c19dccb0a0f8126 |
| Download: | download sample |
| Signature | GuLoader |
| File size: | 985'832 bytes |
| First seen: | 2026-03-06 15:38:27 UTC |
| Last seen: | 2026-04-07 18:39:00 UTC |
| File type: |  exe |
| MIME type: | application/x-dosexec |
| imphash | f4639a0b3116c2cfc71144b88a929cfd (136 x GuLoader, 55 x Formbook, 40 x VIPKeylogger) |
| ssdeep | 24576:RXaVXbFfDTwbaCoMoZ2j7IRUCAm504gmfZoeYCQ:FobVDsmn4j8t04gmmL |
| Threatray | 2'486 similar samples on MalwareBazaar |
| TLSH | T14225230AE0B99463E9F11170043766B6FEBB5F1155A0838BA7343F3F3DB58B1852A693 |
| TrID | 50.3% (.EXE) Win32 Executable MS Visual C++ (generic) (31206/45/13) 10.6% (.DLL) Win32 Dynamic Link Library (generic) (6578/25/2) 10.5% (.EXE) Win64 Executable (generic) (6522/11/2) 8.1% (.EXE) Win16 NE executable (generic) (5038/12/1) 7.2% (.EXE) Win32 Executable (generic) (4504/4/1) |
| Magika | pebin |
| dhash icon | d022d8c8f28f80c0 (44 x GuLoader, 12 x VIPKeylogger, 7 x Formbook) |
| Reporter |  adrian__luca |
| Tags: | exe GuLoader signed |
Code Signing Certificate
| Organisation: | Mannerly |
|---|---|
| Issuer: | Mannerly |
| Algorithm: | sha256WithRSAEncryption |
| Valid from: | 2026-02-26T06:22:42Z |
| Valid to: | 2027-02-26T06:22:42Z |
| Serial number: | 2fb21c332607d3ae9c202c0fa6d1fa6528e1af4e |
| Thumbprint Algorithm: | SHA256 |
| Thumbprint: | d5dba32536ba750a032bf462a3e795d9ffba6bb80948468dcb3578016e0adc01 |
| Source: | This information was brought to you by ReversingLabs A1000 Malware Analysis Platform |
Intelligence
File Origin
# of uploads :
2
# of downloads :
153
Origin country :
HUVendor 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:
formbook
ID:
1
File name:
Justi pago.tar
Verdict:
Malicious activity
Analysis date:
2026-02-27 12:52:45 UTC
Tags:
arch-exec formbook xloader
Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Detection:
n/a
Detection(s):
Verdict:
Clean
Score:
89.1%
Tags:
n/a
Verdict:
Malicious
Labled as:
Trojan.Generic
Verdict:
Malicious
File Type:
exe x32
Detections:
Trojan-Downloader.Win32.Minix.sb Trojan.Win32.Guloader.sb Trojan.NSIS.Makoob.sba HEUR:Trojan-Downloader.Win32.Minix.gen
Verdict:
Unknown
Score:
98%
Verdict:
Malware
File Type:
PE
Gathering data
Verdict:
Malicious
Threat:
Family.FORMBOOK
Threat name:
Win32.Trojan.Kepavll
Status:
Malicious
First seen:
2026-02-26 15:55:10 UTC
File Type:
PE (Exe)
Extracted files:
36
AV detection:
21 of 36 (58.33%)
Threat level:
5/5
Detection(s):
Suspicious file
Verdict:
malicious
Label(s):
cloudeye
Similar samples:
+ 2'476 additional samples on MalwareBazaar
Result
Malware family:
guloader
Score:
10/10
Tags:
family:formbook family:guloader discovery downloader rat spyware stealer trojan
Behaviour
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: MapViewOfSection
Suspicious use of WriteProcessMemory
Enumerates physical storage devices
Program crash
System Location Discovery: System Language Discovery
Suspicious use of NtCreateThreadExHideFromDebugger
Suspicious use of NtSetInformationThreadHideFromDebugger
Contacts third-party web service commonly abused for C2
Loads dropped DLL
Formbook payload
Formbook
Formbook family
Guloader family
Guloader,Cloudeye
Unpacked files
SH256 hash:
4a6b8d26d298279a62f2a27aa6a8a9b67db22a2195f9e4de3c19dccb0a0f8126
MD5 hash:
f46329e59f449cdcd96a1d78b4e96f59
SHA1 hash:
007386fadca47afbe5632420c46f658a978eb688
SH256 hash:
23d618a0293c78ce00f7c6e6dd8b8923621da7dd1f63a070163ef4c0ec3033d6
MD5 hash:
192639861e3dc2dc5c08bb8f8c7260d5
SHA1 hash:
58d30e460609e22fa0098bc27d928b689ef9af78
SH256 hash:
89a82c4849c21dfe765052681e1fad02d2d7b13c8b5075880c52423dca72a912
MD5 hash:
b7d61f3f56abf7b7ff0d4e7da3ad783d
SHA1 hash:
15ab5219c0e77fd9652bc62ff390b8e6846c8e3e
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: | DebuggerCheck__API |
|---|---|
| Reference: | https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara |
| Rule name: | DetectEncryptedVariants |
|---|---|
| Author: | Zinyth |
| Description: | Detects 'encrypted' in ASCII, Unicode, base64, or hex-encoded |
| Rule name: | Detect_NSIS_Nullsoft_Installer |
|---|---|
| Author: | Obscurity Labs LLC |
| Description: | Detects NSIS installers by .ndata section + NSIS header string |
| Rule name: | golang_bin_JCorn_CSC846 |
|---|---|
| Author: | Justin Cornwell |
| Description: | CSC-846 Golang detection ruleset |
| Rule name: | pe_detect_tls_callbacks |
|---|
| Rule name: | PE_Digital_Certificate |
|---|---|
| Author: | albertzsigovits |
| Rule name: | pe_no_import_table |
|---|---|
| Description: | Detect pe file that no import table |
| Rule name: | Sus_CMD_Powershell_Usage |
|---|---|
| Author: | XiAnzheng |
| Description: | May Contain(Obfuscated or no) Powershell or CMD Command that can be abused by threat actor(can create FP) |
| Rule name: | telebot_framework |
|---|---|
| Author: | vietdx.mb |
File information
The table below shows additional information about this malware sample such as delivery method and external references.
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