MalwareBazaar Database
You are currently viewing the MalwareBazaar entry for SHA256 19d05f729486668dfacd7f7b7b493137dcefd18aae7047aff7c9e770484dc921. 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: | 19d05f729486668dfacd7f7b7b493137dcefd18aae7047aff7c9e770484dc921 |
|---|---|
| SHA3-384 hash: | d75382f88113748c0482c28f8adb4720c3f60ea7c519ecb18f37a46b3d3fcf079c6788f7611f419b57acd0cde01d91ed |
| SHA1 hash: | 00e5bf3c69c4a43c4464a3c07039e1ba7455e54f |
| MD5 hash: | deee693834c78b33084cf1ffc9d802f6 |
| humanhash: | butter-april-hot-fillet |
| File name: | 19d05f729486668dfacd7f7b7b493137dcefd18aae7047aff7c9e770484dc921 |
| Download: | download sample |
| Signature | GuLoader |
| File size: | 508'848 bytes |
| First seen: | 2025-11-06 10:36:35 UTC |
| Last seen: | Never |
| File type: |  exe |
| MIME type: | application/x-dosexec |
| imphash | 56a78d55f3f7af51443e58e0ce2fb5f6 (739 x GuLoader, 453 x Formbook, 295 x Loki) |
| ssdeep | 6144:j3yztn5lWLs3o+18s07doAVEytm8tusYndSMj0FKUXw3rgEF2Pvp7Xzrw03wQ:j3iCLs3DToyAbtfNYnAPQ2PvpJ |
| Threatray | 2'234 similar samples on MalwareBazaar |
| TLSH | T198B401C1BD44D05ADE600BF01D2AA728467AFD6DA0F4A6933BC4378E7830793952F766 |
| 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 | 40c0d0dc8c8dcc01 (2 x GuLoader) |
| Reporter |  adrian__luca |
| Tags: | exe GuLoader signed |
Code Signing Certificate
| Organisation: | Flyveledernes |
|---|---|
| Issuer: | Flyveledernes |
| Algorithm: | sha256WithRSAEncryption |
| Valid from: | 2025-09-03T04:21:04Z |
| Valid to: | 2026-09-03T04:21:04Z |
| Serial number: | 4aa3f0c25be6cb992369859f483c6ae9eee43558 |
| Thumbprint Algorithm: | SHA256 |
| Thumbprint: | 8c2324260ff92dd7ddd4f2ed7f6e21ad4168ef675bb93ac93f477c215ed586c2 |
| Source: | This information was brought to you by ReversingLabs A1000 Malware Analysis Platform |
Intelligence
File Origin
# of uploads :
1
# of downloads :
78
Origin country :
HUVendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
19d05f729486668dfacd7f7b7b493137dcefd18aae7047aff7c9e770484dc921
Verdict:
Malicious activity
Analysis date:
2025-11-06 13:56:45 UTC
Tags:
n/a
Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Detection:
n/a
Detection(s):
Verdict:
Malicious
Score:
92.5%
Tags:
injection uloader virus
Result
Verdict:
Clean
Maliciousness:
Behaviour
Creating a window
Creating a file in the %temp% subdirectories
Searching for the window
Creating a file in the Program Files subdirectories
Unauthorized injection to a recently created process
Restart of the analyzed sample
Gathering data
Verdict:
Malicious
File Type:
exe x32
First seen:
2025-10-15T02:21:00Z UTC
Last seen:
2025-11-08T00:11:00Z UTC
Hits:
~100
Verdict:
Unknown
Score:
100%
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:
2025-10-15 05:08:53 UTC
File Type:
PE (Exe)
Extracted files:
12
AV detection:
25 of 37 (67.57%)
Threat level:
5/5
Detection(s):
Suspicious file
Verdict:
malicious
Label(s):
cloudeye
Similar samples:
+ 2'224 additional samples on MalwareBazaar
Result
Malware family:
formbook
Score:
10/10
Tags:
family:formbook discovery 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
Drops file in Program Files directory
Suspicious use of NtCreateThreadExHideFromDebugger
Suspicious use of NtSetInformationThreadHideFromDebugger
Loads dropped DLL
Formbook payload
Formbook
Formbook family
Verdict:
Malicious
Tags:
n/a
YARA:
n/a
Unpacked files
SH256 hash:
19d05f729486668dfacd7f7b7b493137dcefd18aae7047aff7c9e770484dc921
MD5 hash:
deee693834c78b33084cf1ffc9d802f6
SHA1 hash:
00e5bf3c69c4a43c4464a3c07039e1ba7455e54f
SH256 hash:
56b96add1978b1abba286f7f8982b0efbe007d4a48b3ded6a4d408e01d753fe2
MD5 hash:
6c3f8c94d0727894d706940a8a980543
SHA1 hash:
0d1bcad901be377f38d579aafc0c41c0ef8dcefd
SH256 hash:
8dc562cda7217a3a52db898243de3e2ed68b80e62ddcb8619545ed0b4e7f65a8
MD5 hash:
cff85c549d536f651d4fb8387f1976f2
SHA1 hash:
d41ce3a5ff609df9cf5c7e207d3b59bf8a48530e
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: | 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: | shellcode |
|---|---|
| Author: | nex |
| Description: | Matched shellcode byte patterns |
| 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) |
File information
The table below shows additional information about this malware sample such as delivery method and external references.
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