MalwareBazaar Database
You are currently viewing the MalwareBazaar entry for SHA256 fbcbfa3bae2c721a8923ef296e7f7140d3035a2cf711ab3df4d948eba6226446. 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: 10
| SHA256 hash: | fbcbfa3bae2c721a8923ef296e7f7140d3035a2cf711ab3df4d948eba6226446 |
|---|---|
| SHA3-384 hash: | 3b54ada8d9c76fdc52ad9432be61b3a983f47a714ca0fe1601155430854f1fd55989484c7e661043bc863492d59f7f03 |
| SHA1 hash: | 8cf6d4a96fdd20c4fa220b626f2762020e840192 |
| MD5 hash: | 7c00ca581a2791d24954f3fbd347a3fe |
| humanhash: | bulldog-four-summer-cola |
| File name: | fbcbfa3bae2c721a8923ef296e7f7140d3035a2cf711ab3df4d948eba6226446 |
| Download: | download sample |
| Signature | GuLoader |
| File size: | 1'193'616 bytes |
| First seen: | 2025-10-09 15:09:07 UTC |
| Last seen: | 2025-11-06 10:02:23 UTC |
| File type: |  exe |
| MIME type: | application/x-dosexec |
| imphash | 6e7f9a29f2c85394521a08b9f31f6275 (326 x GuLoader, 65 x AgentTesla, 63 x RemcosRAT) |
| ssdeep | 24576:BMwl93McUMv/sc8gOnYp+2gGpyHl5p4Uo3ry0npvsIC:BMwlpagEcFD4GpyHlEPugp9C |
| TLSH | T1B74513C6E20A84E2EE1B0A305013693612BF3DBDCC68466A415E327D7877ED3517FA5E |
| 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 | 88097195c7c36b6b (1 x GuLoader, 1 x AgentTesla) |
| Reporter |  adrian__luca |
| Tags: | exe GuLoader signed |
Code Signing Certificate
| Organisation: | Mispatched |
|---|---|
| Issuer: | Mispatched |
| Algorithm: | sha256WithRSAEncryption |
| Valid from: | 2025-09-04T03:13:18Z |
| Valid to: | 2026-09-04T03:13:18Z |
| Serial number: | 1e75b3c02c97ee3297bfabf6ef46a9d4a2254a54 |
| Thumbprint Algorithm: | SHA256 |
| Thumbprint: | 55ae53f1f515265f5c3c9da7fc8d312c450c540373c8d36228759b9add0742a1 |
| Source: | This information was brought to you by ReversingLabs A1000 Malware Analysis Platform |
Intelligence
File Origin
# of uploads :
2
# of downloads :
99
Origin country :
HUVendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
fbcbfa3bae2c721a8923ef296e7f7140d3035a2cf711ab3df4d948eba6226446
Verdict:
No threats detected
Analysis date:
2025-10-10 00:17:11 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:
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:
Likely Malicious
Threat level:
7.5/10
Confidence:
100%
Tags:
adaptive-context guloader installer microsoft_visual_cc obfuscated overlay signed
Verdict:
Malicious
File Type:
exe x32
First seen:
2025-09-29T10:51:00Z UTC
Last seen:
2025-10-09T11:02:00Z UTC
Hits:
~1000
Verdict:
Suspicious
Score:
97%
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
Gathering data
Threat name:
Win32.Trojan.GuLoader
Status:
Malicious
First seen:
2025-09-29 14:13:39 UTC
File Type:
PE (Exe)
Extracted files:
25
AV detection:
21 of 36 (58.33%)
Threat level:
5/5
Detection(s):
Suspicious file
Result
Malware family:
masslogger
Score:
10/10
Tags:
family:guloader family:masslogger collection discovery downloader spyware stealer
Behaviour
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: MapViewOfSection
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
outlook_office_path
outlook_win_path
Enumerates physical storage devices
System Location Discovery: System Language Discovery
Drops file in Program Files directory
Suspicious use of NtCreateThreadExHideFromDebugger
Suspicious use of NtSetInformationThreadHideFromDebugger
Accesses Microsoft Outlook profiles
Badlisted process makes network request
Looks up external IP address via web service
Checks computer location settings
Guloader family
Guloader,Cloudeye
MassLogger
Masslogger family
Verdict:
Malicious
Tags:
n/a
YARA:
n/a
Unpacked files
SH256 hash:
fbcbfa3bae2c721a8923ef296e7f7140d3035a2cf711ab3df4d948eba6226446
MD5 hash:
7c00ca581a2791d24954f3fbd347a3fe
SHA1 hash:
8cf6d4a96fdd20c4fa220b626f2762020e840192
SH256 hash:
48c290cf400a8e3a5e6cded2f4817d344c4d20745c8659cccbc09edad5866dc0
MD5 hash:
9cbefc918a4560f3e780bc927e0e4008
SHA1 hash:
4c23e9947f5d2338b4cfeb870cc9f9dcb7ee37e3
SH256 hash:
b7823a15e7b1866ba3d77248f750b66505859d264cfc39d8c8c5e812f8ae4a81
MD5 hash:
a1da6788aeaf78ca4ae1dece8019e49d
SHA1 hash:
d770155e6e9aa69223be198c44a8da26a1756d89
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: | 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.
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