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MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 cf0fca518efdb30e694787bfca05de89ec1942cd4e25433d1533a30a95adcf98. 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


Intelligence 13 IOCs YARA 4 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: cf0fca518efdb30e694787bfca05de89ec1942cd4e25433d1533a30a95adcf98
SHA3-384 hash: fe021fac1ef8ff97983a1dc20bd25ee00bd7c271f96c3e2dd128a0a234aa06adc3b5433749e43b4ad9f54fad3768002a
SHA1 hash: 395668433ea34b1786c1656f244cafc1f7b3491b
MD5 hash: 4c46e8a5830a06f53802e1ec3b350aae
humanhash: muppet-missouri-kansas-timing
File name:1007052025whatsappimage.exe
Download: download sample
Signature GuLoader
Create hunting rule
File size:779'344 bytes
First seen:2026-05-20 18:15:22 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash e160ef8e55bb9d162da4e266afd9eef3 (145 x GuLoader, 33 x RemcosRAT, 17 x AgentTesla)
ssdeep 12288:0WXhigNtYYYGrbM+GMRXUSosJloUXCJJkLjFC9wn5iSA81g/QXDfwvJ7p+HD:0AHN+Y54YX5vl3XCkLBnEi1fXTQy
Threatray 1'146 similar samples on MalwareBazaar
TLSH T182F4239426E3924AD5CA3C729993D678FF339D0184225A2F1F88FEDE28315E78C2414F
TrID 93.1% (.EXE) NSIS - Nullsoft Scriptable Install System (846567/2/133)
3.4% (.EXE) Win32 Executable MS Visual C++ (generic) (31206/45/13)
0.7% (.DLL) Win32 Dynamic Link Library (generic) (6578/25/2)
0.7% (.EXE) Win64 Executable (generic) (6522/11/2)
0.5% (.EXE) Win16 NE executable (generic) (5038/12/1)
Magika pebin
dhash icon e0f0e8ecf9ecf860 (1 x MassLogger, 1 x GuLoader)
Reporter TomU
Tags:exe GuLoader signed

Code Signing Certificate

Organisation:Hermelinskindenes
Issuer:Hermelinskindenes
Algorithm:sha256WithRSAEncryption
Valid from:2024-11-07T10:17:22Z
Valid to:2025-11-07T10:17:22Z
Serial number: 7fad4133e7648556b1ed63547c592fb86afb2d8e
Thumbprint Algorithm:SHA256
Thumbprint: 0d5b0b90118f811dee244be3e88541799dd9c6a05535bdf1b0301605eea2fad1
Source:This information was brought to you by ReversingLabs A1000 Malware Analysis Platform

Intelligence

File Origin
# of uploads :
1
# of downloads :
107
Origin country :
CH CH
Vendor Threat Intelligence
Malware configuration found for:
NSIS
Details
Link:
https://research.acce.ciphertechsolutions.com/results/8ddae750-ddee-4a33-af1c-f804a2abf5f7/
Malware family:
n/a
ID:
1
File name:
cd953d3884fb435ce3191cb0b712df0d4f4ca6604ca6ea2119298b421cc49595
Verdict:
Malicious activity
Analysis date:
2025-05-08 06:00:21 UTC
Tags:
arch-exec snake keylogger evasion stealer
Link:
https://app.any.run/tasks/b62730f1-bb86-4f9b-af9c-f729bf646ef4

Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Detection:
n/a
Link:
https://www.capesandbox.com/analysis/66973/
Verdict:
Malicious
Score:
94.1%
Link:
https://cyber-fortress.com/docs/result/index.php?id=6a0e1b7e4159ce11f601fe53
Tags:
injection obfusc virus
Result
Verdict:
Malware
Maliciousness:

Behaviour
Creating a window
Creating a file in the %AppData% subdirectories
Creating a file
Searching for the window
Creating a file in the %temp% subdirectories
Verdict:
Likely Malicious
Threat level:
  7.5/10
Confidence:
100%
Tags:
adaptive-context anti-debug expired-cert guloader installer installer installer-heuristic microsoft_visual_cc nsis reconnaissance signed
Link:
https://www.filescan.io/uploads/6a0e0145056ea44c453626cd/reports/8c00946b-4ffc-47c9-a19f-d911d801a820/overview
Verdict:
Unknown
Link:
https://www.hybrid-analysis.com/sample/cf0fca518efdb30e694787bfca05de89ec1942cd4e25433d1533a30a95adcf98
Verdict:
Malicious
File Type:
exe x32
First seen:
2025-05-08T01:25:00Z UTC
Last seen:
2026-05-22T15:26:00Z UTC
Hits:
~1000
Link:
https://opentip.kaspersky.com/cf0fca518efdb30e694787bfca05de89ec1942cd4e25433d1533a30a95adcf98/results?tab=lookup
Verdict:
Suspicious
Link:
https://analyze.intezer.com/analyses/56ebab26-426b-489e-afe6-b55d595fe00b
Score:
88%
Verdict:
Malware
File Type:
PE
Link:
https://malprob.io/report/cf0fca518efdb30e694787bfca05de89ec1942cd4e25433d1533a30a95adcf98
Gathering data
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/cf0fca518efdb30e694787bfca05de89ec1942cd4e25433d1533a30a95adcf98/
Threat name:
Win32.Trojan.Guloader
Create hunting rule
Status:
Suspicious
First seen:
2025-05-08 05:00:27 UTC
File Type:
PE (Exe)
Extracted files:
14
AV detection:
22 of 38 (57.89%)
Threat level:
  5/5
Verdict:
malicious
Label(s):
cloudeye
Create hunting rule
Similar samples:
1eda1b310543e616e8b7b97e8e5f13597fb3a67ed9658b3daba2f49361563689
GuLoader
26e297f8f4bf5837af4c8b5132598c2eed45245c4f6baf0e8c960ff2a555989e
GuLoader
30c4d81a0075e27984f768fa73c43240f5b14724a84a5057c15c99114b4aac15
GuLoader
53495ecf8b97a44f42431f7a069d6d993728788af54c20ce7ece289640c3e1c9
GuLoader
778463dc4bc09f828ebcadef7aa7d828f5d1240b6adbf4dff33d7938a62e485e
GuLoader
c30ce79d7b5b0708dc03f1532fa89afd4efd732531cb557dc31fe63acd5bc1ce
GuLoader
c7a4fff1122cdbc4427cb51deb67fb1e4cfdf7013af9d7fb31c60d7ede7eb979
GuLoader
e4b98a029783ce068a262f3393caa28754470082b6b7066f34a27595e5ff2ea2
GuLoader
ef0ceab01e813f995915d6c596bd663a469928024e9295b093388a4a7215bb1d
GuLoader
error
GuLoader
facf2fbbac21edd7550d00e6f6916f9ee598f9c3bdc2ca0feb288c139d687672
GuLoader
+ 1'136 additional samples on MalwareBazaar
Result
Malware family:
guloader
Create hunting rule
Score:
  10/10
Tags:
family:guloader discovery downloader installer
Link:
https://tria.ge/reports/260520-wwdeqafw4j/
Behaviour
Suspicious behavior: MapViewOfSection
Suspicious use of WriteProcessMemory
Enumerates physical storage devices
System Location Discovery: System Language Discovery
Drops file in Program Files directory
Drops file in Windows directory
Suspicious use of NtSetInformationThreadHideFromDebugger
Loads dropped DLL
Family: Guloader,Cloudeye
Unpacked files
SH256 hash:
cf0fca518efdb30e694787bfca05de89ec1942cd4e25433d1533a30a95adcf98
MD5 hash:
4c46e8a5830a06f53802e1ec3b350aae
SHA1 hash:
395668433ea34b1786c1656f244cafc1f7b3491b
Link:
https://www.unpac.me/results/b916b016-10aa-408d-99c5-937520412199/
SH256 hash:
44e5dfd551b38e886214bd6b9c8ee913c4c4d1f085a6575d97c3e892b925da82
MD5 hash:
883eff06ac96966270731e4e22817e11
SHA1 hash:
523c87c98236cbc04430e87ec19b977595092ac8
Link:
https://www.unpac.me/results/b916b016-10aa-408d-99c5-937520412199/
Malware family:
GuLoader
Create hunting rule
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/cf0fca518efd/report/overview.html
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Suspicious File
Score:
0.52
Link:
https://yomi.yoroi.company/submissions/cf0fca518efdb30e694787bfca05de89ec1942cd4e25433d1533a30a95adcf98

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_SliverFox_String
Create hunting rule
Author:huoji
Description:Detect files is `SliverFox` malware
Rule name:FreddyBearDropper
Create hunting rule
Author:Dwarozh Hoshiar
Description:Freddy Bear Dropper is dropping a malware through base63 encoded powershell scrip.
Rule name:PE_Digital_Certificate
Create hunting rule
Author:albertzsigovits
Rule name:VECT_Ransomware
Create hunting rule
Author:Mustafa Bakhit
Description:Detects activity associated with VECT ransomware. This includes registry modifications and deletions, execution of system and defense-evasion commands, suspicious API usage, mutex creation, file and memory manipulation, ransomware note generation, anti-debugging and anti-analysis techniques, and embedded cryptographic constants (SHA256) characteristic of this malware family. Designed for threat intelligence and malware detection environments.

File information

The table below shows additional information about this malware sample such as delivery method and external references.

Malspam

GuLoader

Executable exe cf0fca518efdb30e694787bfca05de89ec1942cd4e25433d1533a30a95adcf98

(this sample)

  
Delivery method
Distributed via e-mail attachment
Cape
Cape
https://www.capesandbox.com/analysis/66973/

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