MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 a72339bd5dacd0be878d313f00219bfd71244964f533fec908f00faa48072c39. 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: 15

Intelligence 15 IOCs YARA 3 File information Comments

SHA256 hash:	a72339bd5dacd0be878d313f00219bfd71244964f533fec908f00faa48072c39
SHA3-384 hash:	c731e73e6641fbfbb19f46eb7fa61b5852faa90c98955e266ab8404429b79f5d4f4f46a7ded271cec062b9919e4c2db2
SHA1 hash:	9a2e84f95adbfdeba5a9f105907b6586367e8025
MD5 hash:	30fc83cb7db5b058f16f58ed95c1dda0
humanhash:	november-fifteen-michigan-april
File name:	Payment-advice-00008998008888-PDF.exe
Download:	download sample
Signature	GuLoader Create hunting rule
File size:	947'136 bytes
First seen:	2025-07-31 04:01:48 UTC
Last seen:	Never
File type:	exe
MIME type:	application/x-dosexec
imphash	84062c623770f0d888e4ca58451aa7ad (10 x GuLoader, 1 x Formbook, 1 x RemcosRAT)
ssdeep	24576:QFZJQ/QR+NSmYT6pOEFbLan5CzvgqwL7uaO:Q3JQ/4mYT6pOwLsePk
TLSH	T17D1512087B92E16AD52D0BB41F36CAB163F07D0454A89EA6B7F0BF1B78725D06D3C285
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	b9b0f8ecbcbcda72 (2 x GuLoader)
Reporter	threatcat_ch
Tags:	exe GuLoader RemcosRAT signed

Code Signing Certificate

Organisation:	Vegie
Issuer:	Vegie
Algorithm:	sha256WithRSAEncryption
Valid from:	2025-06-11T05:27:37Z
Valid to:	2026-09-14T05:27:37Z
Serial number:	62d4fad691cce05912daed1044af48b81b395a95
Thumbprint Algorithm:	SHA256
Thumbprint:	ccb9c77eb38038243810a138563d20e2f0ebeb4da39a24cb9461ea5a784e7664
Source:	This information was brought to you by ReversingLabs A1000 Malware Analysis Platform

Intelligence

File Origin

# of uploads :

# of downloads :

Origin country :

Vendor Threat Intelligence

Malware family:

remcos

ID:

File name:

Payment-advice-00008998008888-PDF.exe

Verdict:

Malicious activity

Analysis date:

2025-07-31 04:02:40 UTC

Tags:

rat remcos

Link:

https://app.any.run/tasks/26b2298b-cd5f-46b4-a49d-e984ec884ebb

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/17879/

Verdict:

Malicious

Score:

91.7%

Link:

https://cyber-fortress.com/docs/result/index.php?id=688aeac70b4775fb2133cbec

Tags:

injection obfusc crypt

Result

Verdict:

Clean

Maliciousness:

Behaviour

Creating a file in the %temp% directory

Creating a window

Searching for the window

Creating a file

Launching a process

Sending a custom TCP request

Using the Windows Management Instrumentation requests

Verdict:

Suspicious

Threat level:

5/10

Confidence:

100%

Tags:

adaptive-context anti-debug blackhole installer masquerade microsoft_visual_cc overlay overlay signed

Link:

https://www.filescan.io/uploads/688aeac1c79df08ef09900f5/reports/95883f5a-6d89-43a0-a48b-bda02e98a17d/overview

Verdict:

Malicious

Labled as:

Win/malicious_confidence_60%

Link:

https://www.hybrid-analysis.com/sample/a72339bd5dacd0be878d313f00219bfd71244964f533fec908f00faa48072c39

Verdict:

Unknown

Link:

https://analyze.intezer.com/analyses/e5cba134-c21b-4f20-954b-ac0e9f10742f

Result

Threat name:

Remcos, GuLoader

Detection:

malicious

Classification:

troj.evad

Score:

100 / 100

Link:

https://www.joesandbox.com/analysis/1747493

Signature

AI detected suspicious PE digital signature

C2 URLs / IPs found in malware configuration

Detected Remcos RAT

Early bird code injection technique detected

Found malware configuration

Found suspicious powershell code related to unpacking or dynamic code loading

Hides threads from debuggers

Initial sample is a PE file and has a suspicious name

Joe Sandbox ML detected suspicious sample

Loading BitLocker PowerShell Module

Multi AV Scanner detection for dropped file

Multi AV Scanner detection for submitted file

Powershell drops PE file

Queues an APC in another process (thread injection)

Sigma detected: Remcos

Writes to foreign memory regions

Yara detected GuLoader

Yara detected Remcos RAT

Behaviour

Behavior Graph:

Download SVG

Score:

92%

Verdict:

Malware

File Type:

Link:

https://malprob.io/report/a72339bd5dacd0be878d313f00219bfd71244964f533fec908f00faa48072c39

Verdict:

inconclusive

YARA:

5 match(es)

Tags:

Executable PE (Portable Executable) Win 32 Exe x86

Link:

https://app.malva.re/file/30fc83cb7db5b058f16f58ed95c1dda0

Detection:

n/a

Link:

https://mwdb.cert.pl/sample/a72339bd5dacd0be878d313f00219bfd71244964f533fec908f00faa48072c39/

Verdict:

Malicious

Threat:

Trojan.NSIS.Makoob

Link:

https://tip.neiki.dev/file/a72339bd5dacd0be878d313f00219bfd71244964f533fec908f00faa48072c39

Threat name:

Win32.Trojan.Guloader

Status:

Malicious

First seen:

2025-07-31 04:02:24 UTC

File Type:

PE (Exe)

Extracted files:

AV detection:

16 of 24 (66.67%)

Threat level:

5/5

Detection(s):

Suspicious file

Link:

https://check.spamhaus.org/check/?searchterm=u4rttpk5vtil5b4nge7qaim37vysisle6uz75sii6ah2usahfq4q._file

Result

Malware family:

remcos

Score:

10/10

Tags:

family:guloader family:remcos botnet:remotehost discovery downloader execution rat

Link:

https://tria.ge/reports/250731-eltwaayyct/

Behaviour

Suspicious behavior: EnumeratesProcesses

Suspicious behavior: MapViewOfSection

Suspicious use of AdjustPrivilegeToken

Suspicious use of FindShellTrayWindow

Suspicious use of SendNotifyMessage

Suspicious use of WriteProcessMemory

Command and Scripting Interpreter: PowerShell

Enumerates physical storage devices

System Location Discovery: System Language Discovery

Drops file in Windows directory

Drops file in System32 directory

Suspicious use of NtCreateThreadExHideFromDebugger

Suspicious use of NtSetInformationThreadHideFromDebugger

Blocklisted process makes network request

Legitimate hosting services abused for malware hosting/C2

Guloader family

Guloader,Cloudeye

Remcos

Remcos family

Malware Config

C2 Extraction:

196.251.81.212:2404

Verdict:

Malicious

Tags:

n/a

YARA:

n/a

Link:

https://app.threat.zone/submission/ea86f769-b2f0-49c9-8472-b3ece2dabeb4

Unpacked files

SH256 hash:

a72339bd5dacd0be878d313f00219bfd71244964f533fec908f00faa48072c39

MD5 hash:

30fc83cb7db5b058f16f58ed95c1dda0

SHA1 hash:

9a2e84f95adbfdeba5a9f105907b6586367e8025

Link:

https://www.unpac.me/results/ddc17758-5454-41a0-9a1b-82279565e0cf/

Malware family:

Remcos

Verdict:

Malicious

Link:

https://www.vmray.com/analyses/_mb/a72339bd5dac/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/a72339bd5dacd0be878d313f00219bfd71244964f533fec908f00faa48072c39

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_Digital_Certificate Create hunting rule
Author:	albertzsigovits

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

exe a72339bd5dacd0be878d313f00219bfd71244964f533fec908f00faa48072c39

(this sample)

Delivery method

Distributed via e-mail attachment

Cape

https://www.capesandbox.com/analysis/17879/

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

ID	Title	Severity
CHECK_DLL_CHARACTERISTICS	Missing dll Security Characteristics (HIGH_ENTROPY_VA)	high

Reviews

ID	Capabilities	Evidence
COM_BASE_API	Can Download & Execute components	ole32.dll::CoCreateInstance
SECURITY_BASE_API	Uses Security Base API	ADVAPI32.dll::AdjustTokenPrivileges ADVAPI32.dll::SetFileSecurityW
SHELL_API	Manipulates System Shell	SHELL32.dll::ShellExecuteExW SHELL32.dll::SHFileOperationW SHELL32.dll::SHGetFileInfoW
WIN32_PROCESS_API	Can Create Process and Threads	KERNEL32.dll::CreateProcessW ADVAPI32.dll::OpenProcessToken KERNEL32.dll::CloseHandle KERNEL32.dll::CreateThread
WIN_BASE_API	Uses Win Base API	KERNEL32.dll::LoadLibraryExW KERNEL32.dll::GetDiskFreeSpaceW KERNEL32.dll::GetCommandLineW
WIN_BASE_IO_API	Can Create Files	KERNEL32.dll::CopyFileW KERNEL32.dll::CreateDirectoryW KERNEL32.dll::CreateFileW KERNEL32.dll::DeleteFileW KERNEL32.dll::MoveFileW KERNEL32.dll::MoveFileExW
WIN_BASE_USER_API	Retrieves Account Information	ADVAPI32.dll::LookupPrivilegeValueW
WIN_REG_API	Can Manipulate Windows Registry	ADVAPI32.dll::RegCreateKeyExW ADVAPI32.dll::RegDeleteKeyW ADVAPI32.dll::RegOpenKeyExW ADVAPI32.dll::RegQueryValueExW ADVAPI32.dll::RegSetValueExW
WIN_USER_API	Performs GUI Actions	USER32.dll::AppendMenuW USER32.dll::EmptyClipboard USER32.dll::FindWindowExW USER32.dll::OpenClipboard USER32.dll::PeekMessageW USER32.dll::CreateWindowExW

Comments

Login required

You need to login to in order to write a comment. Login with your abuse.ch account.

No comments found for this malware sample