MalwareBazaar Database
You are currently viewing the MalwareBazaar entry for SHA256 b1b6afd20d36558fea98979e2a6705291719875ab92bbd9764bec3addb1c2dee. 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: 11
| SHA256 hash: | b1b6afd20d36558fea98979e2a6705291719875ab92bbd9764bec3addb1c2dee |
|---|---|
| SHA3-384 hash: | c69359c7212b6bb760a45528567d210454825a200157970d2af482a71ca4d90148433395a470df75d56a0f64103f7427 |
| SHA1 hash: | 1ce1ca7a77ff10fc49d50bac628de2347bff3b05 |
| MD5 hash: | aceef3b51da511be17da27905a5ff20e |
| humanhash: | nine-bravo-johnny-pizza |
| File name: | b1b6afd20d36558fea98979e2a6705291719875ab92bbd9764bec3addb1c2dee |
| Download: | download sample |
| Signature | GuLoader |
| File size: | 755'752 bytes |
| First seen: | 2025-12-08 15:21:42 UTC |
| Last seen: | Never |
| File type: |  exe |
| MIME type: | application/x-dosexec |
| imphash | 61259b55b8912888e90f516ca08dc514 (1'059 x Formbook, 744 x AgentTesla, 441 x GuLoader) |
| ssdeep | 6144:+jhKyY1U+BLpGM99vlCiY73lRPvBeY5Q0VPpzTVtk1gPhBmMiXElqUYdeiHsykvq:+jBwjti3lRHBe725nk1gJdi0lqxUykbe |
| Threatray | 605 similar samples on MalwareBazaar |
| TLSH | T17BF4D00AF6D0C61DD1A51A3E5CBA963837775C11194ACB96B3883EC7CD72688EF42723 |
| 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 | 8000fea8646e8c90 (1 x XWorm, 1 x GuLoader) |
| Reporter |  adrian__luca |
| Tags: | exe GuLoader signed |
Code Signing Certificate
| Organisation: | Toldklarerers |
|---|---|
| Issuer: | Toldklarerers |
| Algorithm: | sha256WithRSAEncryption |
| Valid from: | 2025-10-02T10:32:39Z |
| Valid to: | 2026-10-02T10:32:39Z |
| Serial number: | 10d597f9c3b0f991f6d76f6c131071622daa0e7f |
| Thumbprint Algorithm: | SHA256 |
| Thumbprint: | 749cbe12dae5249db3d735111ec700104b9a100925631f484d3a683b088f2983 |
| Source: | This information was brought to you by ReversingLabs A1000 Malware Analysis Platform |
Intelligence
File Origin
# of uploads :
1
# of downloads :
111
Origin country :
HUVendor Threat Intelligence
Malware configuration found for:
NSIS
Details
Malware family:
n/a
ID:
1
File name:
b1b6afd20d36558fea98979e2a6705291719875ab92bbd9764bec3addb1c2dee
Verdict:
No threats detected
Analysis date:
2025-12-08 14:07:23 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:
93.3%
Tags:
injection obfusc virus nsis
Result
Verdict:
Malware
Maliciousness:
Behaviour
Creating a file in the %temp% directory
Creating a window
Searching for the window
Creating a file
DNS request
Verdict:
Malicious
File Type:
exe x32
First seen:
2025-11-20T01:51:00Z UTC
Last seen:
2025-12-09T19:07:00Z UTC
Hits:
~100
Verdict:
Unknown
Score:
93%
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.Generic
Status:
Suspicious
First seen:
2025-11-20 04:47:43 UTC
File Type:
PE (Exe)
Extracted files:
5
AV detection:
16 of 36 (44.44%)
Threat level:
5/5
Detection(s):
Suspicious file
Verdict:
malicious
Label(s):
cloudeye
Similar samples:
+ 595 additional samples on MalwareBazaar
Result
Malware family:
n/a
Score:
7/10
Tags:
discovery
Behaviour
Suspicious behavior: MapViewOfSection
Suspicious use of WriteProcessMemory
Enumerates physical storage devices
Program crash
System Location Discovery: System Language Discovery
Suspicious use of NtSetInformationThreadHideFromDebugger
Loads dropped DLL
Verdict:
Suspicious
Tags:
n/a
YARA:
n/a
Unpacked files
SH256 hash:
b1b6afd20d36558fea98979e2a6705291719875ab92bbd9764bec3addb1c2dee
MD5 hash:
aceef3b51da511be17da27905a5ff20e
SHA1 hash:
1ce1ca7a77ff10fc49d50bac628de2347bff3b05
SH256 hash:
a4ec98011ef99e595912718c1a1bf1aa67bfc2192575729d42f559d01f67b95c
MD5 hash:
d968cb2b98b83c03a9f02dd9b8df97dc
SHA1 hash:
d784c9b7a92dce58a5038beb62a48ff509e166a0
Malware family:
GuLoader
Verdict:
Malicious
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Suspicious File
Score:
0.34
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: | 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 |
| 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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