MalwareBazaar Database
You are currently viewing the MalwareBazaar entry for SHA256 54d1b412c756fa7c8ea26801ec08823a94603078a46b701b7ef5e4484d472fe0. 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: 14
| SHA256 hash: | 54d1b412c756fa7c8ea26801ec08823a94603078a46b701b7ef5e4484d472fe0 |
|---|---|
| SHA3-384 hash: | 938388192cb6d390cab5b4c2b534b90fba7ff72d6faf26936aba921115f7fbfc77bc24d0840f54207723d9032803feb7 |
| SHA1 hash: | 82d197dcf365647a8b67f6bfb7aa0f298960e1ad |
| MD5 hash: | a90838a59c74be0f3f13fc4d1578b01d |
| humanhash: | don-bluebird-blue-twelve |
| File name: | scan_0827.exe |
| Download: | download sample |
| Signature | GuLoader |
| File size: | 513'240 bytes |
| First seen: | 2025-08-27 06:09:38 UTC |
| Last seen: | Never |
| File type: |  exe |
| MIME type: | application/x-dosexec |
| imphash | 9a16e282eba7cc710070c0586c947693 (26 x GuLoader, 11 x VIPKeylogger, 7 x RemcosRAT) |
| ssdeep | 12288:Pq7rPyoZdm85CBwWvyR5l2z1eVKGaFsPRYW19:Pq7rPyWVKyQpe8H0x |
| Threatray | 42 similar samples on MalwareBazaar |
| TLSH | T124B4233233F9D453EAE00570093F01A7A7A3DE9358A46B5B678DBC2E7C223959B1E50D |
| 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 |  threatcat_ch |
| Tags: | exe GuLoader |
Intelligence
File Origin
# of uploads :
1
# of downloads :
109
Origin country :
CHVendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
SMTP[1].eml.tgz
Verdict:
Malicious activity
Analysis date:
2025-08-27 02:32:08 UTC
Tags:
arch-doc arch-email attachments attc-unc arch-exec
Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Detection:
n/a
Verdict:
Malicious
Score:
90.2%
Tags:
uloader virus blic
Result
Verdict:
Clean
Maliciousness:
Behaviour
Creating a window
Searching for the window
Creating a file in the %AppData% subdirectories
Creating a file
Creating a file in the %temp% directory
Delayed reading of the file
Verdict:
Unknown
Threat level:
2.5/10
Confidence:
100%
Tags:
adaptive-context installer microsoft_visual_cc obfuscated overlay signed
Verdict:
Malicious
Labled as:
Malware_44.5
Verdict:
Malicious
File Type:
exe x32
First seen:
2025-08-26T23:08:00Z UTC
Last seen:
2025-08-26T23:08:00Z UTC
Hits:
~1000
Verdict:
Unknown
Result
Threat name:
n/a
Detection:
malicious
Classification:
evad
Score:
68 / 100
Signature
AI detected suspicious PE digital signature
Antivirus / Scanner detection for submitted sample
Multi AV Scanner detection for submitted file
Switches to a custom stack to bypass stack traces
Tries to detect virtualization through RDTSC time measurements
Behaviour
Behavior Graph:
Score:
99%
Verdict:
Malware
File Type:
PE
Gathering data
Verdict:
Malicious
Threat:
Family.REMCOS
Detection(s):
Suspicious file
Verdict:
malicious
Label(s):
cloudeye
Similar samples:
+ 32 additional samples on MalwareBazaar
Result
Malware family:
remcos
Score:
10/10
Tags:
family:remcos discovery installer rat
Behaviour
Suspicious behavior: MapViewOfSection
Suspicious use of WriteProcessMemory
Enumerates physical storage devices
Program crash
System Location Discovery: System Language Discovery
Drops file in Windows directory
Drops file in System32 directory
Suspicious use of NtCreateThreadExHideFromDebugger
Suspicious use of NtSetInformationThreadHideFromDebugger
Legitimate hosting services abused for malware hosting/C2
Loads dropped DLL
Remcos
Remcos family
Verdict:
Suspicious
Tags:
loader guloader
YARA:
NSIS_GuLoader_July_2024
Unpacked files
SH256 hash:
54d1b412c756fa7c8ea26801ec08823a94603078a46b701b7ef5e4484d472fe0
MD5 hash:
a90838a59c74be0f3f13fc4d1578b01d
SHA1 hash:
82d197dcf365647a8b67f6bfb7aa0f298960e1ad
SH256 hash:
a44ca08afb3f6bafd76aa35c259f3d599fe34f6f49ea5118626c1c1a540b0f03
MD5 hash:
81e268e27dbbcadbf116b5a9402195ab
SHA1 hash:
bd2b701b2e5e279786e179bceee2dc132a2afc37
Malware family:
Remcos
Verdict:
Malicious
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Suspicious File
Score:
0.52
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: | CP_AllMal_Detector |
|---|---|
| Author: | DiegoAnalytics |
| Description: | CrossPlatform All Malwares Detector: Detect PE, ELF, Mach-O, scripts, archives; overlay, obfuscation, encryption, spoofing, hiding, high entropy, network communication |
| 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 |
| Rule name: | Sus_Obf_Enc_Spoof_Hide_PE |
|---|---|
| Author: | XiAnzheng |
| Description: | Check for Overlay, Obfuscating, Encrypting, Spoofing, Hiding, or Entropy Technique(can create FP) |
File information
The table below shows additional information about this malware sample such as delivery method and external references.
Malspam
Delivery method
Distributed via e-mail attachment
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