MalwareBazaar Database
You are currently viewing the MalwareBazaar entry for SHA256 a563955ca7d826b6c396cc89bb829f72d1ccd57e4696496f6ef7faae1c8b8353. 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: 13
| SHA256 hash: | a563955ca7d826b6c396cc89bb829f72d1ccd57e4696496f6ef7faae1c8b8353 |
|---|---|
| SHA3-384 hash: | f54cd080b7e8a5218ee6363438cbded71c2f2e2d977e916c0e5f8f962252121d00ee216e060a4fcfd6045f9449ab8f5b |
| SHA1 hash: | 0a8a3f7bda40e811228eff343fac3ce616d11339 |
| MD5 hash: | e874c4b3c19bae110d534965470ad685 |
| humanhash: | timing-shade-equal-mike |
| File name: | a563955ca7d826b6c396cc89bb829f72d1ccd57e4696496f6ef7faae1c8b8353 |
| Download: | download sample |
| Signature | GuLoader |
| File size: | 849'888 bytes |
| First seen: | 2025-10-09 14:25:10 UTC |
| Last seen: | Never |
| File type: |  exe |
| MIME type: | application/x-dosexec |
| imphash | 9a16e282eba7cc710070c0586c947693 (26 x GuLoader, 11 x VIPKeylogger, 7 x RemcosRAT) |
| ssdeep | 24576:G+7ZvFYRCHsydCz8UyS8W7pw6XRC3CXe+zmFdyuQsqTom7p0DvM:D7VmYdCz8dSlnXQaec7uQ+m764 |
| Threatray | 1'888 similar samples on MalwareBazaar |
| TLSH | T1360523133FB4C553FA630A780A7A9293EEE1D8119D51584F3FF0A28EE8A8FC1511E957 |
| 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 |
| Reporter |  adrian__luca |
| Tags: | exe GuLoader signed |
Code Signing Certificate
| Organisation: | Variantkoders |
|---|---|
| Issuer: | Variantkoders |
| Algorithm: | sha256WithRSAEncryption |
| Valid from: | 2025-07-29T00:32:43Z |
| Valid to: | 2026-07-29T00:32:43Z |
| Serial number: | 1eeee45e825d56e7d358f1cb5600ddbb660325ea |
| Thumbprint Algorithm: | SHA256 |
| Thumbprint: | 0e2789e79a64be8dc6bfadbd2a0b363c53634f61588442f31a2451b160e8e3a6 |
| Source: | This information was brought to you by ReversingLabs A1000 Malware Analysis Platform |
Intelligence
File Origin
# of uploads :
1
# of downloads :
53
Origin country :
HUVendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
a563955ca7d826b6c396cc89bb829f72d1ccd57e4696496f6ef7faae1c8b8353
Verdict:
Malicious activity
Analysis date:
2025-10-09 17:40:41 UTC
Tags:
evasion snake keylogger telegram stealer smtp
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:
injection uloader virus nsis
Result
Verdict:
Malware
Maliciousness:
Behaviour
Creating a window
Searching for the window
Creating a file in the %AppData% subdirectories
Delayed reading of the file
Creating a file in the %temp% subdirectories
Sending a custom TCP request
Verdict:
Likely Malicious
Threat level:
7.5/10
Confidence:
100%
Tags:
adaptive-context installer microsoft_visual_cc obfuscated overlay signed
Verdict:
Malicious
File Type:
exe x32
First seen:
2025-09-22T08:26:00Z UTC
Last seen:
2025-10-09T06:32:00Z UTC
Hits:
~10000
Verdict:
Malicious
Score:
92%
Verdict:
Malware
File Type:
PE
Gathering data
Threat name:
Win32.Trojan.Guloader
Status:
Malicious
First seen:
2025-09-22 11:36:01 UTC
File Type:
PE (Exe)
Extracted files:
17
AV detection:
19 of 36 (52.78%)
Threat level:
5/5
Detection(s):
Suspicious file
Verdict:
malicious
Label(s):
cloudeye
Similar samples:
+ 1'878 additional samples on MalwareBazaar
Result
Malware family:
vipkeylogger
Score:
10/10
Tags:
family:guloader family:vipkeylogger collection discovery downloader installer keylogger spyware stealer
Behaviour
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: MapViewOfSection
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
outlook_office_path
outlook_win_path
Browser Information Discovery
Enumerates physical storage devices
System Location Discovery: System Language Discovery
Drops file in Windows directory
Suspicious use of NtCreateThreadExHideFromDebugger
Suspicious use of NtSetInformationThreadHideFromDebugger
Accesses Microsoft Outlook profiles
Legitimate hosting services abused for malware hosting/C2
Looks up external IP address via web service
Loads dropped DLL
Reads user/profile data of local email clients
Reads user/profile data of web browsers
Guloader family
Guloader,Cloudeye
VIPKeylogger
Vipkeylogger family
Verdict:
Suspicious
Tags:
loader guloader
YARA:
NSIS_GuLoader_July_2024
Unpacked files
SH256 hash:
a563955ca7d826b6c396cc89bb829f72d1ccd57e4696496f6ef7faae1c8b8353
MD5 hash:
e874c4b3c19bae110d534965470ad685
SHA1 hash:
0a8a3f7bda40e811228eff343fac3ce616d11339
SH256 hash:
7853be9190489ba84dae8232e9a967cec02d941732cb4137bc9ae6a392e89fb8
MD5 hash:
3fbd78c889fa40a2e5567b980c57b7db
SHA1 hash:
303564bfa6fd5ab7a65d35ae1cd14a05643b6b5d
SH256 hash:
a44ca08afb3f6bafd76aa35c259f3d599fe34f6f49ea5118626c1c1a540b0f03
MD5 hash:
81e268e27dbbcadbf116b5a9402195ab
SHA1 hash:
bd2b701b2e5e279786e179bceee2dc132a2afc37
Malware family:
GuLoader
Verdict:
Malicious
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: | Ins_NSIS_Buer_Nov_2020_1 |
|---|---|
| Author: | Arkbird_SOLG |
| Description: | Detect NSIS installer used for Buer loader |
| 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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