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MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 d78beea33ff995cf0269602c7b95e498c1eec4b9be5e70c5b367a4435842db31. 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: 17


Intelligence 17 IOCs YARA 4 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: d78beea33ff995cf0269602c7b95e498c1eec4b9be5e70c5b367a4435842db31
SHA3-384 hash: fa0a949271a6d6b14553d5e0385096803f59da0910245b512d430122ebcc38316a84654d15d4b8633085073dd3dd27e7
SHA1 hash: 5c46a56f3b2aa3b383b431b223d2f847adcedddb
MD5 hash: 6aabda25e2138d1197fa327c1096ea93
humanhash: mississippi-quebec-april-seventeen
File name:1109118734xlsx.exe
Download: download sample
Signature GuLoader
Create hunting rule
File size:1'424'776 bytes
First seen:2025-10-12 23:35:32 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash 9dda1a1d1f8a1d13ae0297b47046b26e (65 x Formbook, 48 x GuLoader, 28 x RemcosRAT)
ssdeep 24576:Kadmu5MNkum/mthprduS9gTC5F4h0zM1ObgZuXiuG9uQ1/Wg2Uw95jcscEb67xsb:pNmyz+/tiTC5Fo0QIG9uk/2/Xjct3s
Threatray 4'318 similar samples on MalwareBazaar
TLSH T14C65D0EA7A70C39DDFD84EF35EAB8120DB556C3DC8D0164E51F4322C8AB060A195BD6E
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 f0b67a6ecc7e3ebe (5 x GuLoader, 1 x RemcosRAT)
Reporter threatcat_ch
Tags:exe GuLoader signed

Code Signing Certificate

Organisation:Preexaminations
Issuer:Preexaminations
Algorithm:sha256WithRSAEncryption
Valid from:2025-09-01T10:32:52Z
Valid to:2026-09-01T10:32:52Z
Serial number: 767a6a538f157b3feda2e42592dda7b870551e3e
Thumbprint Algorithm:SHA256
Thumbprint: 2a2b304bed580143decd17913be39ccc33ca6ab19c56d41116052b55e8cefcb4
Source:This information was brought to you by ReversingLabs A1000 Malware Analysis Platform

Intelligence

File Origin
# of uploads :
1
# of downloads :
234
Origin country :
CH CH
Vendor Threat Intelligence
Malware family:
remcos
Create hunting rule
ID:
1
File name:
1109118734xlsx.exe
Verdict:
Malicious activity
Analysis date:
2025-10-12 23:37:10 UTC
Tags:
remcos rat evasion remote stealer mpress
Link:
https://app.any.run/tasks/2eb2b174-46f4-4913-aebd-738090bafbd8

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/32493/
Verdict:
Malicious
Score:
91.7%
Link:
https://cyber-fortress.com/docs/result/index.php?id=68ec3b50777ae46bec420b19
Tags:
injection blic sage
Result
Verdict:
Clean
Maliciousness:

Behaviour
Creating a file in the %temp% directory
Creating a window
Creating a file
Creating a file in the %AppData% subdirectories
Searching for the window
Delayed reading of the file
Verdict:
Unknown
Threat level:
  2.5/10
Confidence:
100%
Tags:
adaptive-context installer microsoft_visual_cc obfuscated overlay signed
Link:
https://www.filescan.io/uploads/68ec3b7c4f3013c55e4b4a17/reports/e90436b7-cc3b-4432-80e4-9f73962e877f/overview
Verdict:
Suspicious
Labled as:
Malware_54.2
Link:
https://www.hybrid-analysis.com/sample/d78beea33ff995cf0269602c7b95e498c1eec4b9be5e70c5b367a4435842db31
Verdict:
Malicious
File Type:
exe x32
First seen:
2025-10-12T19:50:00Z UTC
Last seen:
2025-10-14T21:22:00Z UTC
Hits:
~10000
Detections:
Trojan.NSIS.Makoob.sbb Trojan.NSIS.Makoob.sba Trojan.Win32.GuLoader.sb PDM:Trojan.Win32.Generic HEUR:Trojan.Win32.GuLoader.gen Trojan-Downloader.Win32.Minix.sb
Link:
https://opentip.kaspersky.com/d78beea33ff995cf0269602c7b95e498c1eec4b9be5e70c5b367a4435842db31/results?tab=lookup
Malware family:
WinEdt Team
Create hunting rule
Verdict:
Unknown
Link:
https://analyze.intezer.com/analyses/5ca13f22-8a26-43e4-82ce-7bb3067476d3
Result
Threat name:
Remcos, GuLoader
Create hunting rule
Detection:
malicious
Classification:
phis.troj.spyw.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1793684
Signature
AI detected suspicious PE digital signature
Antivirus detection for dropped file
Creates autostart registry keys with suspicious names
Detected Remcos RAT
Found hidden mapped module (file has been removed from disk)
Joe Sandbox ML detected suspicious sample
Maps a DLL or memory area into another process
Multi AV Scanner detection for dropped file
Multi AV Scanner detection for submitted file
Sigma detected: Remcos
Suricata IDS alerts for network traffic
Switches to a custom stack to bypass stack traces
Tries to detect virtualization through RDTSC time measurements
Tries to harvest and steal browser information (history, passwords, etc)
Tries to steal Instant Messenger accounts or passwords
Tries to steal Mail credentials (via file / registry access)
Writes to foreign memory regions
Yara detected GuLoader
Yara detected Remcos RAT
Yara detected WebBrowserPassView password recovery tool
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 1793684 Sample: 1109118734xlsx.exe Startdate: 13/10/2025 Architecture: WINDOWS Score: 100 59 drive.usercontent.google.com 2->59 61 drive.google.com 2->61 63 2 other IPs or domains 2->63 81 Suricata IDS alerts for network traffic 2->81 83 Antivirus detection for dropped file 2->83 85 Multi AV Scanner detection for dropped file 2->85 87 7 other signatures 2->87 10 1109118734xlsx.exe 2 47 2->10         started        14 remcos.exe 33 2->14         started        16 remcos.exe 20 2->16         started        18 remcos.exe 2->18         started        signatures3 process4 file5 53 C:\Users\user\AppData\Local\...\System.dll, PE32 10->53 dropped 99 Tries to detect virtualization through RDTSC time measurements 10->99 101 Switches to a custom stack to bypass stack traces 10->101 20 1109118734xlsx.exe 2 10 10->20         started        55 C:\Users\user\AppData\Local\...\System.dll, PE32 14->55 dropped 25 remcos.exe 14->25         started        signatures6 process7 dnsIp8 65 drive.google.com 142.250.64.174, 443, 49722 GOOGLEUS United States 20->65 67 drive.usercontent.google.com 142.250.64.193, 443, 49723, 49726 GOOGLEUS United States 20->67 49 C:\ProgramData\Remcos\remcos.exe, PE32 20->49 dropped 51 C:\ProgramData\...\remcos.exe:Zone.Identifier, ASCII 20->51 dropped 95 Detected Remcos RAT 20->95 97 Creates autostart registry keys with suspicious names 20->97 27 remcos.exe 33 20->27         started        file9 signatures10 process11 file12 57 C:\Users\user\AppData\Local\...\System.dll, PE32 27->57 dropped 103 Multi AV Scanner detection for dropped file 27->103 105 Found hidden mapped module (file has been removed from disk) 27->105 107 Tries to detect virtualization through RDTSC time measurements 27->107 109 Switches to a custom stack to bypass stack traces 27->109 31 remcos.exe 4 17 27->31         started        signatures13 process14 dnsIp15 69 196.251.72.34, 2404, 49730, 49732 Web4AfricaZA Seychelles 31->69 71 142.250.64.206, 443, 49725, 49728 GOOGLEUS United States 31->71 73 2 other IPs or domains 31->73 43 C:\Users\user\AppData\Local\Temp\TH508C.tmp, MS-DOS 31->43 dropped 45 C:\Users\user\AppData\Local\Temp\TH507B.tmp, MS-DOS 31->45 dropped 47 C:\Users\user\AppData\Local\Temp\TH505B.tmp, PE32 31->47 dropped 75 Detected Remcos RAT 31->75 77 Writes to foreign memory regions 31->77 79 Maps a DLL or memory area into another process 31->79 36 RmClient.exe 31->36         started        39 RmClient.exe 31->39         started        41 RmClient.exe 31->41         started        file16 signatures17 process18 signatures19 89 Tries to steal Instant Messenger accounts or passwords 36->89 91 Tries to steal Mail credentials (via file / registry access) 36->91 93 Tries to harvest and steal browser information (history, passwords, etc) 39->93
Score:
89%
Verdict:
Malware
File Type:
PE
Link:
https://malprob.io/report/d78beea33ff995cf0269602c7b95e498c1eec4b9be5e70c5b367a4435842db31
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/6aabda25e2138d1197fa327c1096ea93
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/d78beea33ff995cf0269602c7b95e498c1eec4b9be5e70c5b367a4435842db31/
Verdict:
Malicious
Threat:
Family.REMCOS
Link:
https://tip.neiki.dev/file/d78beea33ff995cf0269602c7b95e498c1eec4b9be5e70c5b367a4435842db31
Threat name:
Win32.Trojan.GuLoader
Create hunting rule
Status:
Malicious
First seen:
2025-10-12 23:36:29 UTC
File Type:
PE (Exe)
Extracted files:
13
AV detection:
14 of 24 (58.33%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=26f65iz77gk46atjmawhxfpetda65rfzxzphbrntm6segwcc3myq._file
Verdict:
malicious
Label(s):
cloudeye
Create hunting rule
Similar samples:
0c67ccd6b722d25bbe932693afe8d0895555d12442699122c8810d2d6610e2a8
GuLoader
0cb6636748ff6a60ebf1a4644a7b4c877f8a19edd8c7a2eac10b34d1bd7cbfbf
GuLoader
29032ae14e315863a55a0851c3e1c9cb246beb4513a279d8b1bf7fac97be6ff7
GuLoader
2bab4b4ef0cd5ce5f2dff0ddcbdfb7295c0d141fb4c88ec305268b24a3e23a5c
GuLoader
43753d7fe1487c758cfebd575c0818b13ef5c3c278a0fa9539e04fe1a86553eb
GuLoader
55118f31295208ddb2a3e7f18a340056c791d338d8375080cdf618c2bc01bd08
GuLoader
79866667d5cd578a1c6eda54a748ff9d316fff39064eecd282bc2a9ad8a5ac7d
GuLoader
da9c5f609ebbcf19aef3d6992d451ccbe4fa77858660f6861146d1a486e1d98e
GuLoader
ebb0272ecef9d8bf07a71b9ead8718760d27c4fdc334fe2de7a8b93237e61044
GuLoader
error
GuLoader
+ 4'308 additional samples on MalwareBazaar
Result
Malware family:
remcos
Create hunting rule
Score:
  10/10
Tags:
family:remcos collection discovery persistence rat
Link:
https://tria.ge/reports/251012-3lch1agn2x/
Behaviour
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: MapViewOfSection
Suspicious use of AdjustPrivilegeToken
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 NtCreateThreadExHideFromDebugger
Suspicious use of NtSetInformationThreadHideFromDebugger
Suspicious use of SetThreadContext
Accesses Microsoft Outlook accounts
Adds Run key to start application
Legitimate hosting services abused for malware hosting/C2
Looks up external IP address via web service
Checks computer location settings
Executes dropped EXE
Loads dropped DLL
Detected Nirsoft tools
NirSoft MailPassView
NirSoft WebBrowserPassView
Remcos
Remcos family
Malware Config
C2 Extraction:
196.251.72.34:2404
Verdict:
Suspicious
Tags:
n/a
YARA:
n/a
Link:
https://app.threat.zone/submission/0ed96fef-ab09-469a-ac53-f80814127b88
Unpacked files
SH256 hash:
d78beea33ff995cf0269602c7b95e498c1eec4b9be5e70c5b367a4435842db31
MD5 hash:
6aabda25e2138d1197fa327c1096ea93
SHA1 hash:
5c46a56f3b2aa3b383b431b223d2f847adcedddb
Link:
https://www.unpac.me/results/d90fbfe2-5c3d-459e-8fbb-41b3ae04b343/
SH256 hash:
23d618a0293c78ce00f7c6e6dd8b8923621da7dd1f63a070163ef4c0ec3033d6
MD5 hash:
192639861e3dc2dc5c08bb8f8c7260d5
SHA1 hash:
58d30e460609e22fa0098bc27d928b689ef9af78
Link:
https://www.unpac.me/results/d90fbfe2-5c3d-459e-8fbb-41b3ae04b343/
SH256 hash:
89a82c4849c21dfe765052681e1fad02d2d7b13c8b5075880c52423dca72a912
MD5 hash:
b7d61f3f56abf7b7ff0d4e7da3ad783d
SHA1 hash:
15ab5219c0e77fd9652bc62ff390b8e6846c8e3e
Link:
https://www.unpac.me/results/d90fbfe2-5c3d-459e-8fbb-41b3ae04b343/
Malware family:
Remcos
Create hunting rule
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/d78beea33ff9/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/d78beea33ff995cf0269602c7b95e498c1eec4b9be5e70c5b367a4435842db31

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:pe_detect_tls_callbacks
Create hunting rule
Rule name:PE_Digital_Certificate
Create hunting rule
Author:albertzsigovits
Rule name:pe_no_import_table
Create hunting rule
Description:Detect pe file that no import table

File information

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

Malspam

GuLoader

Executable exe d78beea33ff995cf0269602c7b95e498c1eec4b9be5e70c5b367a4435842db31

(this sample)

  
Delivery method
Distributed via e-mail attachment
Cape
Cape
https://www.capesandbox.com/analysis/32493/

Comments