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MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 1f718cbbd49a4acdb460945eb74a04fe48173802dd4ad1b05873dc63a0839b0a. 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: 19


Intelligence 19 IOCs YARA 2 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 1f718cbbd49a4acdb460945eb74a04fe48173802dd4ad1b05873dc63a0839b0a
SHA3-384 hash: 37967983808114d6ba445c2bcd494e5d67cc9cdfb70b9105c926072140839b30f7c18bb5471ae097993b2526f2d2f106
SHA1 hash: e913d3ea7d8289c02d2c111043d93d9a539711fc
MD5 hash: 1e00cdfab8f0c96ff7c511d3dbaf2c75
humanhash: mockingbird-bluebird-moon-chicken
File name:scan.exe
Download: download sample
Signature GuLoader
Create hunting rule
File size:507'594 bytes
First seen:2026-04-21 22:35:16 UTC
Last seen:2026-05-04 12:10:46 UTC
File type:Executable exe
MIME type:application/x-dosexec
imphash 573bb7b41bc641bd95c0f5eec13c233b (66 x GuLoader, 32 x AgentTesla, 31 x RemcosRAT)
ssdeep 12288:5TA+Q4ew5hJduOwhDvTdU1EpDaY+6Vt0SGZNu49ezMgIa:5TAP4ea8N7haY+kuu8eAgIa
TLSH T159B422111391D079CD52227952367BFDAEF53C606435970F6BE03E2A3AB0B42ED1EB12
TrID 50.3% (.EXE) Win32 Executable MS Visual C++ (generic) (31206/45/13)
10.6% (.DLL) Win32 Dynamic Link Library (generic) (6578/25/2)
10.5% (.EXE) Win64 Executable (generic) (6522/11/2)
8.1% (.EXE) Win16 NE executable (generic) (5038/12/1)
7.2% (.EXE) Win32 Executable (generic) (4504/4/1)
Magika pebin
dhash icon 72e0d4dcc061e060 (3 x GuLoader, 2 x RemcosRAT)
Reporter threatcat_ch
Tags:exe GuLoader

Intelligence

File Origin
# of uploads :
3
# of downloads :
185
Origin country :
CH CH
Vendor Threat Intelligence
Malware configuration found for:
GuLoader NSIS
Details
GuLoader
an XOR decryption key and an extracted component
GuLoader
a c2 URL, a useragent string, and a string XOR key
NSIS
extracted archive contents
Link:
https://research.acce.ciphertechsolutions.com/results/85a44dc1-ae74-44b9-91a2-cd45ca112f3a/
Malware family:
remcos
Create hunting rule
ID:
1
File name:
_1f718cbbd49a4acdb460945eb74a04fe48173802dd4ad1b05873dc63a0839b0a.exe
Verdict:
Malicious activity
Analysis date:
2026-04-21 22:37:00 UTC
Tags:
auto-reg rat remcos
Link:
https://app.any.run/tasks/24bbe0ae-f293-4d03-b8cd-34822fd40e00

Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Detection:
Guloader
Create hunting rule
Link:
https://www.capesandbox.com/analysis/63025/
Verdict:
Malicious
Score:
81.4%
Link:
https://cyber-fortress.com/docs/result/index.php?id=69e7fbc34aed15d0792ef6f7
Tags:
injection obfusc
Result
Verdict:
Malware
Maliciousness:

Behaviour
Creating a window
Searching for the window
Creating a file
Creating a file in the %temp% directory
Delayed reading of the file
DNS request
Unauthorized injection to a recently created process
Restart of the analyzed sample
Connection attempt
Sending a custom TCP request
Sending an HTTP GET request
Verdict:
Likely Malicious
Threat level:
  7.5/10
Confidence:
100%
Tags:
adaptive-context anti-debug fingerprint installer installer installer-heuristic microsoft_visual_cc nsis soft-404
Link:
https://www.filescan.io/uploads/69e7fbbb8a82359247abb07c/reports/4dbe0bbd-98c8-4f57-b965-11ca3b159953/overview
Verdict:
Suspicious
Labled as:
Malware_
Link:
https://www.hybrid-analysis.com/sample/1f718cbbd49a4acdb460945eb74a04fe48173802dd4ad1b05873dc63a0839b0a
Verdict:
Malicious
File Type:
exe x32
First seen:
2026-04-21T19:20:00Z UTC
Last seen:
2026-04-23T20:39:00Z UTC
Hits:
~10000
Detections:
Trojan.NSIS.Makoob.sbb Trojan-Dropper.Win32.Injector.sb VHO:Trojan.Win32.GuLoader.gen Trojan.Win32.GuLoader.sb HEUR:Trojan.NSIS.GuLoader.gen Trojan.NSIS.Makoob.sba Trojan-Downloader.Win32.Minix.sb Backdoor.Win32.Remcos.sb Trojan.Win32.GuLoader.duw PDM:Trojan.Win32.Generic Trojan.NSIS.Makoob.sbd
Link:
https://opentip.kaspersky.com/1f718cbbd49a4acdb460945eb74a04fe48173802dd4ad1b05873dc63a0839b0a/results?tab=lookup
Verdict:
Unknown
Link:
https://analyze.intezer.com/analyses/10fe33f6-88cc-4cff-b635-227c509fe706
Result
Threat name:
Remcos, GuLoader
Create hunting rule
Detection:
malicious
Classification:
troj.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1902380
Signature
C2 URLs / IPs found in malware configuration
Creates autostart registry keys with suspicious names
Detected Remcos RAT
Found malware configuration
Multi AV Scanner detection for dropped file
Multi AV Scanner detection for submitted file
Switches to a custom stack to bypass stack traces
Tries to detect virtualization through RDTSC time measurements
Unusual module load detection (module proxying)
Yara detected GuLoader
Yara detected Remcos RAT
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 1902380 Sample: scan.exe Startdate: 22/04/2026 Architecture: WINDOWS Score: 100 44 31.57.216.128 RASANAIR Iran (ISLAMIC Republic Of) 2->44 46 drive.usercontent.google.com 2->46 48 drive.google.com 2->48 58 Found malware configuration 2->58 60 Multi AV Scanner detection for submitted file 2->60 62 Yara detected GuLoader 2->62 64 2 other signatures 2->64 9 scan.exe 10 49 2->9         started        13 remcos.exe 33 2->13         started        signatures3 process4 file5 38 C:\Users\user\AppData\Local\...\System.dll, PE32 9->38 dropped 66 Tries to detect virtualization through RDTSC time measurements 9->66 68 Unusual module load detection (module proxying) 9->68 70 Switches to a custom stack to bypass stack traces 9->70 15 scan.exe 2 10 9->15         started        20 scan.exe 9->20         started        40 C:\Users\user\AppData\Local\...\System.dll, PE32 13->40 dropped 22 remcos.exe 13->22         started        24 remcos.exe 13->24         started        signatures6 process7 dnsIp8 50 drive.google.com 142.251.211.110, 443, 49693 GOOGLEUS United States 15->50 52 drive.usercontent.google.com 142.251.211.97, 443, 49694 GOOGLEUS United States 15->52 36 C:\ProgramData\Remcos\remcos.exe, PE32 15->36 dropped 54 Detected Remcos RAT 15->54 56 Creates autostart registry keys with suspicious names 15->56 26 remcos.exe 33 15->26         started        30 scan.exe 15->30         started        file9 signatures10 process11 file12 42 C:\Users\user\AppData\Local\...\System.dll, PE32 26->42 dropped 72 Multi AV Scanner detection for dropped file 26->72 74 Tries to detect virtualization through RDTSC time measurements 26->74 76 Switches to a custom stack to bypass stack traces 26->76 32 remcos.exe 13 26->32         started        34 remcos.exe 26->34         started        signatures13 process14
Score:
97%
Verdict:
Malware
File Type:
PE
Link:
https://malprob.io/report/1f718cbbd49a4acdb460945eb74a04fe48173802dd4ad1b05873dc63a0839b0a
Verdict:
inconclusive
YARA:
5 match(es)
Tags:
Executable NSIS Installer PE (Portable Executable) PE File Layout Win 32 Exe x86
Link:
https://app.malva.re/file/1e00cdfab8f0c96ff7c511d3dbaf2c75
Detection:
remcos
Create hunting rule
Link:
https://mwdb.cert.pl/sample/1f718cbbd49a4acdb460945eb74a04fe48173802dd4ad1b05873dc63a0839b0a/
Verdict:
Malicious
Threat:
Family.REMCOS
Link:
https://tip.neiki.dev/file/1f718cbbd49a4acdb460945eb74a04fe48173802dd4ad1b05873dc63a0839b0a
Threat name:
Win32.Trojan.Guloader
Create hunting rule
Status:
Malicious
First seen:
2026-04-21 22:35:46 UTC
File Type:
PE (Exe)
Extracted files:
12
AV detection:
21 of 38 (55.26%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=d5yyzo6utjfm3ndasrplosqe7zebooac3vfndmcyopoghiedtmfa._file
Result
Malware family:
remcos
Create hunting rule
Score:
  10/10
Tags:
family:guloader family:remcos botnet:remotehost discovery downloader persistence rat spyware stealer
Link:
https://tria.ge/reports/260421-2hz98agv7w/
Behaviour
Suspicious behavior: MapViewOfSection
Suspicious use of WriteProcessMemory
Enumerates physical storage devices
System Location Discovery: System Language Discovery
Drops file in Windows directory
Suspicious use of NtCreateThreadExHideFromDebugger
Suspicious use of NtSetInformationThreadHideFromDebugger
Adds Run key to start application
Checks installed software on the system
Contacts third-party web service commonly abused for C2
Checks computer location settings
Executes dropped EXE
Loads dropped DLL
Reads user/profile data of web browsers
Family: Guloader,Cloudeye
Family: Remcos
Malware Config
C2 Extraction:
31.57.216.128:2404
Unpacked files
SH256 hash:
1f718cbbd49a4acdb460945eb74a04fe48173802dd4ad1b05873dc63a0839b0a
MD5 hash:
1e00cdfab8f0c96ff7c511d3dbaf2c75
SHA1 hash:
e913d3ea7d8289c02d2c111043d93d9a539711fc
Link:
https://www.unpac.me/results/5341c687-633c-4668-b025-4e7973f5dc81/
SH256 hash:
8b4c47c4cf5e76ec57dd5a050d5acd832a0d532ee875d7b44f6cdaf68f90d37c
MD5 hash:
9b38a1b07a0ebc5c7e59e63346ecc2db
SHA1 hash:
97332a2ffcf12a3e3f27e7c05213b5d7faa13735
Link:
https://www.unpac.me/results/5341c687-633c-4668-b025-4e7973f5dc81/
Malware family:
GuLoader
Create hunting rule
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/1f718cbbd49a/report/overview.html
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Malicious File
Score:
1.00
Link:
https://yomi.yoroi.company/submissions/1f718cbbd49a4acdb460945eb74a04fe48173802dd4ad1b05873dc63a0839b0a

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
Create hunting rule
Author:Obscurity Labs LLC
Description:Detects NSIS installers by .ndata section + NSIS header string
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 1f718cbbd49a4acdb460945eb74a04fe48173802dd4ad1b05873dc63a0839b0a

(this sample)

  
Delivery method
Distributed via e-mail attachment
Cape
Cape
https://www.capesandbox.com/analysis/63025/

Comments