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MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 fb84f716815f754bb0d14c94098da7d16ac3ff6caae85d110f0f96c8fb83fe24. 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: 11


Intelligence 11 IOCs YARA 3 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: fb84f716815f754bb0d14c94098da7d16ac3ff6caae85d110f0f96c8fb83fe24
SHA3-384 hash: 6a5115b91b1de0a817645af14d2fb090c1d2dd95f576167731ffe81096007dc51cbbbde1447430574dc9405c43146046
SHA1 hash: d769586f66753fc8507150e0acec662920d0d7b0
MD5 hash: a27844538feaff20e4fbe39992338bbe
humanhash: low-football-don-yankee
File name:doc1172432.exe
Download: download sample
Signature GuLoader
Create hunting rule
File size:739'608 bytes
First seen:2025-04-17 09:46:45 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash 61259b55b8912888e90f516ca08dc514 (1'059 x Formbook, 744 x AgentTesla, 441 x GuLoader)
ssdeep 12288:yY/5cwRCTU62skVx5eIqBfwYiGUxiWovro7XrXxqCzh+iKwvQNNux+/XH7P4A3D:yY/5XfgYx5wKGSiW+QrXMCHx+PT4Az
TLSH T14CF423520BD2C233E1520E345DBB7D563EBE9A170560152B1BD0379C2E36BB2692EF27
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 f4d4dcdcccdcdcd4 (6 x RemcosRAT, 6 x GuLoader)
Reporter cocaman
Tags:exe GuLoader signed

Code Signing Certificate

Organisation:Idreforladte
Issuer:Idreforladte
Algorithm:sha256WithRSAEncryption
Valid from:2025-02-22T07:01:38Z
Valid to:2026-02-22T07:01:38Z
Serial number: 4e3521cb6007e350ea435f2f188b9e621acc782f
Thumbprint Algorithm:SHA256
Thumbprint: e6968600c8021def21ef0fafbdca8eb785f111bb066982ada93ccbdaf746a4ca
Source:This information was brought to you by ReversingLabs A1000 Malware Analysis Platform

Intelligence

File Origin
# of uploads :
1
# of downloads :
478
Origin country :
CH CH
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
BANK DETAIL CONFIRMATION__REMITTANCE SCHEDULE 04_17_2025.eml
Verdict:
Malicious activity
Analysis date:
2025-04-17 09:20:35 UTC
Tags:
attachments attc-unc susp-attachments arch-exec
Link:
https://app.any.run/tasks/f8f8c35b-e745-41fc-af99-06063823ee6e

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/2683/
Detection(s):
SecuriteInfo.com.FileRepMalware.17550.10059.UNOFFICIAL
Create hunting rule

Verdict:
Malicious
Score:
93.3%
Link:
https://cyber-fortress.com/docs/result/index.php?id=6800d15b280f5f89a0d0559b
Tags:
injection virus nsis blic
Result
Verdict:
Clean
Maliciousness:

Behaviour
Creating a file in the %temp% directory
Creating a window
Creating a file
Searching for the window
Delayed reading of the file
Verdict:
Suspicious
Threat level:
  5/10
Confidence:
100%
Tags:
adaptive-context blackhole installer microsoft_visual_cc overlay signed
Link:
https://www.filescan.io/uploads/6800ce27931404048d7fe501/reports/72901a3e-0637-45bb-b918-ca42aa5ddd63/overview
Verdict:
Malicious
Labled as:
Win/malicious_confidence_100%
Link:
https://www.hybrid-analysis.com/sample/fb84f716815f754bb0d14c94098da7d16ac3ff6caae85d110f0f96c8fb83fe24
Verdict:
Suspicious
Link:
https://analyze.intezer.com/analyses/0a9a2d12-b6fe-4217-96f6-c0dffefb450c
Result
Threat name:
GuLoader
Create hunting rule
Detection:
malicious
Classification:
troj.evad
Score:
76 / 100
Link:
https://www.joesandbox.com/analysis/1667341
Signature
AI detected suspicious PE digital signature
Joe Sandbox ML detected suspicious sample
Multi AV Scanner detection for submitted file
Sample is not signed and drops a device driver
Switches to a custom stack to bypass stack traces
Tries to detect virtualization through RDTSC time measurements
Yara detected GuLoader
Behaviour
Behavior Graph:
Download SVG
Score:
97%
Verdict:
Malware
File Type:
PE
Link:
https://malprob.io/report/fb84f716815f754bb0d14c94098da7d16ac3ff6caae85d110f0f96c8fb83fe24
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/fb84f716815f754bb0d14c94098da7d16ac3ff6caae85d110f0f96c8fb83fe24/
Threat name:
Win32.Trojan.GuLoader
Create hunting rule
Status:
Malicious
First seen:
2025-04-17 05:18:25 UTC
File Type:
PE (Exe)
Extracted files:
11
AV detection:
24 of 38 (63.16%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=7ocpofubl52uxmgrjskatdnh2fvmh73mvluf2eipb6lmr64d7ysa._file
Result
Malware family:
guloader
Create hunting rule
Score:
  10/10
Tags:
family:guloader discovery downloader
Link:
https://tria.ge/reports/250417-lsdk7svqx5/
Behaviour
Suspicious behavior: MapViewOfSection
Suspicious use of WriteProcessMemory
Enumerates physical storage devices
System Location Discovery: System Language Discovery
Drops file in Windows directory
Drops file in System32 directory
Suspicious use of NtSetInformationThreadHideFromDebugger
Legitimate hosting services abused for malware hosting/C2
Loads dropped DLL
Guloader family
Guloader,Cloudeye
Verdict:
Suspicious
Tags:
n/a
YARA:
n/a
Link:
https://app.threat.zone/submission/4ea12c9f-6f11-43f7-935d-fef219a20f9b
Unpacked files
SH256 hash:
fb84f716815f754bb0d14c94098da7d16ac3ff6caae85d110f0f96c8fb83fe24
MD5 hash:
a27844538feaff20e4fbe39992338bbe
SHA1 hash:
d769586f66753fc8507150e0acec662920d0d7b0
Link:
https://www.unpac.me/results/10acb532-c3ab-4e69-b15d-e91453117336/
SH256 hash:
8dc562cda7217a3a52db898243de3e2ed68b80e62ddcb8619545ed0b4e7f65a8
MD5 hash:
cff85c549d536f651d4fb8387f1976f2
SHA1 hash:
d41ce3a5ff609df9cf5c7e207d3b59bf8a48530e
Link:
https://www.unpac.me/results/10acb532-c3ab-4e69-b15d-e91453117336/
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:PE_Digital_Certificate
Create hunting rule
Author:albertzsigovits
Rule name:shellcode
Create hunting rule
Author:nex
Description:Matched shellcode byte patterns
Rule name:Sus_Obf_Enc_Spoof_Hide_PE
Create hunting rule
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

GuLoader

zip 544ef5cb3ba43587fe78de903f7d56d27dbbd12d912617c57b57101e5998843b

GuLoader

Executable exe fb84f716815f754bb0d14c94098da7d16ac3ff6caae85d110f0f96c8fb83fe24

(this sample)

  
Delivery method
Other
  
Dropped by
SHA256 544ef5cb3ba43587fe78de903f7d56d27dbbd12d912617c57b57101e5998843b
Cape
Cape
https://www.capesandbox.com/analysis/2683/
  
Dropped by
MD5 19d9da7b20f1f281bb6ac39fd6255725

BLint

The following table provides more information about this file using BLint. BLint is a Binary Linter to check the security properties, and capabilities in executables.

Findings
IDTitleSeverity
CHECK_DLL_CHARACTERISTICSMissing dll Security Characteristics (HIGH_ENTROPY_VA)high
Reviews
IDCapabilitiesEvidence
COM_BASE_APICan Download & Execute componentsole32.dll::CoCreateInstance
SECURITY_BASE_APIUses Security Base APIADVAPI32.dll::AdjustTokenPrivileges
ADVAPI32.dll::SetFileSecurityW
SHELL_APIManipulates System ShellSHELL32.dll::ShellExecuteExW
SHELL32.dll::SHFileOperationW
SHELL32.dll::SHGetFileInfoW
WIN32_PROCESS_APICan Create Process and ThreadsKERNEL32.dll::CreateProcessW
ADVAPI32.dll::OpenProcessToken
KERNEL32.dll::CloseHandle
KERNEL32.dll::CreateThread
WIN_BASE_APIUses Win Base APIKERNEL32.dll::LoadLibraryExW
KERNEL32.dll::GetDiskFreeSpaceW
KERNEL32.dll::GetCommandLineW
WIN_BASE_IO_APICan Create FilesKERNEL32.dll::CopyFileW
KERNEL32.dll::CreateDirectoryW
KERNEL32.dll::CreateFileW
KERNEL32.dll::DeleteFileW
KERNEL32.dll::MoveFileW
KERNEL32.dll::MoveFileExW
WIN_BASE_USER_APIRetrieves Account InformationADVAPI32.dll::LookupPrivilegeValueW
WIN_REG_APICan Manipulate Windows RegistryADVAPI32.dll::RegCreateKeyExW
ADVAPI32.dll::RegDeleteKeyW
ADVAPI32.dll::RegOpenKeyExW
ADVAPI32.dll::RegQueryValueExW
ADVAPI32.dll::RegSetValueExW
WIN_USER_APIPerforms GUI ActionsUSER32.dll::AppendMenuW
USER32.dll::EmptyClipboard
USER32.dll::FindWindowExW
USER32.dll::OpenClipboard
USER32.dll::PeekMessageW
USER32.dll::CreateWindowExW

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