MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 aa928f80e184381e6cb9e2a8e159334e3494999165cf97bcd71bdfbb61dce2bf. 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 3 File information Comments

SHA256 hash:	aa928f80e184381e6cb9e2a8e159334e3494999165cf97bcd71bdfbb61dce2bf
SHA3-384 hash:	356c78bcb432c3ce8b9d4151410bb88501c3736e63a5b56218fc07235e47e64efa72ede27ba95f91e168226825dd148b
SHA1 hash:	fa817c784d46fdcfc065a264713c82f5f53b7288
MD5 hash:	6124034fe55707e3ec7a9940b36a2640
humanhash:	lactose-harry-cold-fix
File name:	factura solicitada..exe
Download:	download sample
Signature	GuLoader Create hunting rule
File size:	505'618 bytes
First seen:	2025-02-19 19:34:24 UTC
Last seen:	2025-03-07 14:11:27 UTC
File type:	exe
MIME type:	application/x-dosexec
imphash	b78ecf47c0a3e24a6f4af114e2d1f5de (304 x GuLoader, 23 x Formbook, 21 x RemcosRAT)
ssdeep	12288:sUatc/gP29iwihJafg1LUBCLousN3fjAmBmwG:sUatj2MhAB73fjAAmwG
TLSH	T148B4234168F05C73ECE686769FF6BF58C1B23D4302A04887E7A05B6A3A532C1991A5F7
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
File icon (PE):
dhash icon	f4f4d4dcccdcdcd4 (5 x GuLoader, 1 x SnakeKeylogger)
Reporter	malwarelabnet
Tags:	exe GuLoader VIPKeylogger

Intelligence

File Origin

# of uploads :

# of downloads :

537

Origin country :

Vendor Threat Intelligence

Malware family:

guloader

ID:

File name:

facturasolicitada..exe

Verdict:

Malicious activity

Analysis date:

2025-02-17 12:07:19 UTC

Tags:

guloader loader

Link:

https://app.any.run/tasks/92b94d01-69bf-4636-b6cc-2e78ac337641

Note:

ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample

Detection(s):

SecuriteInfo.com.Mal.Generic-S.31020.16397.20236.UNOFFICIAL

Verdict:

Malicious

Score:

99.1%

Link:

https://cyber-fortress.com/docs/result/index.php?id=67b32676a0fd713c335b6f76

Tags:

obfuscate virus shell

Result

Verdict:

Clean

Maliciousness:

Behaviour

Delayed reading of the file

Creating a window

Creating a file

Launching a process

Using the Windows Management Instrumentation requests

Verdict:

Suspicious

Threat level:

5/10

Confidence:

100%

Tags:

adaptive-context blackhole installer masquerade microsoft_visual_cc obfuscated overlay packed packer_detected

Link:

https://www.filescan.io/uploads/67b63278cfbd4e72e8185c8a/reports/a50f3dbd-d669-4fcd-a033-bab754e729cd/overview

Verdict:

Malicious

Labled as:

Trojan.Generic

Link:

https://www.hybrid-analysis.com/sample/aa928f80e184381e6cb9e2a8e159334e3494999165cf97bcd71bdfbb61dce2bf

Result

Verdict:

MALICIOUS

Details

Windows PE Executable

Found a Windows Portable Executable (PE) binary. Depending on context, the presence of a binary is suspicious or malicious.

Verdict:

Suspicious

Link:

https://analyze.intezer.com/analyses/05db3a8f-8a0d-453a-a285-9744d09ed1c8

Score:

99%

Verdict:

Malware

File Type:

Link:

https://malprob.io/report/aa928f80e184381e6cb9e2a8e159334e3494999165cf97bcd71bdfbb61dce2bf

Detection:

n/a

Link:

https://mwdb.cert.pl/sample/aa928f80e184381e6cb9e2a8e159334e3494999165cf97bcd71bdfbb61dce2bf/

Threat name:

Win32.Trojan.Guloader

Status:

Malicious

First seen:

2025-02-17 09:29:52 UTC

File Type:

PE (Exe)

Extracted files:

AV detection:

24 of 38 (63.16%)

Threat level:

5/5

Detection(s):

Suspicious file

Link:

https://check.spamhaus.org/check/?searchterm=vkji7ahbqq4b43fz4kuocwjtjy2jjgmrmxhzppgxdpp3wyo44k7q._file

Result

Malware family:

n/a

Score:

8/10

Tags:

discovery execution persistence

Link:

https://tria.ge/reports/250219-yaqt2axlb1/

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

Suspicious use of NtSetInformationThreadHideFromDebugger

Blocklisted process makes network request

Legitimate hosting services abused for malware hosting/C2

Command and Scripting Interpreter: PowerShell

Verdict:

Malicious

Tags:

loader guloader

YARA:

NSIS_GuLoader_July_2024

Link:

https://app.threat.zone/submission/270d1a96-047d-4d31-b194-02b429403c3e

Unpacked files

SH256 hash:

aa928f80e184381e6cb9e2a8e159334e3494999165cf97bcd71bdfbb61dce2bf

MD5 hash:

6124034fe55707e3ec7a9940b36a2640

SHA1 hash:

fa817c784d46fdcfc065a264713c82f5f53b7288

Link:

https://www.unpac.me/results/4cd8f52d-8dc6-4c04-8525-d4cfe26ad071/

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/aa928f80e184381e6cb9e2a8e159334e3494999165cf97bcd71bdfbb61dce2bf

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:	Ins_NSIS_Buer_Nov_2020_1 Create hunting rule
Author:	Arkbird_SOLG
Description:	Detect NSIS installer used for Buer loader

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.

No further information available

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_AUTHENTICODE	Missing Authenticode	high
CHECK_DLL_CHARACTERISTICS	Missing dll Security Characteristics (HIGH_ENTROPY_VA)	high

Reviews

ID	Capabilities	Evidence
AUTH_API	Manipulates User Authorization	ADVAPI32.dll::SetFileSecurityA
COM_BASE_API	Can Download & Execute components	ole32.dll::CoCreateInstance
SECURITY_BASE_API	Uses Security Base API	ADVAPI32.dll::AdjustTokenPrivileges
SHELL_API	Manipulates System Shell	SHELL32.dll::ShellExecuteA SHELL32.dll::SHFileOperationA SHELL32.dll::SHGetFileInfoA
WIN32_PROCESS_API	Can Create Process and Threads	KERNEL32.dll::CreateProcessA ADVAPI32.dll::OpenProcessToken KERNEL32.dll::CloseHandle KERNEL32.dll::CreateThread
WIN_BASE_API	Uses Win Base API	KERNEL32.dll::LoadLibraryExA KERNEL32.dll::GetDiskFreeSpaceA KERNEL32.dll::GetCommandLineA
WIN_BASE_IO_API	Can Create Files	KERNEL32.dll::CopyFileA KERNEL32.dll::CreateDirectoryA KERNEL32.dll::CreateFileA KERNEL32.dll::DeleteFileA KERNEL32.dll::MoveFileExA KERNEL32.dll::MoveFileA
WIN_BASE_USER_API	Retrieves Account Information	ADVAPI32.dll::LookupPrivilegeValueA
WIN_REG_API	Can Manipulate Windows Registry	ADVAPI32.dll::RegCreateKeyExA ADVAPI32.dll::RegDeleteKeyA ADVAPI32.dll::RegOpenKeyExA ADVAPI32.dll::RegQueryValueExA ADVAPI32.dll::RegSetValueExA
WIN_USER_API	Performs GUI Actions	USER32.dll::AppendMenuA USER32.dll::EmptyClipboard USER32.dll::FindWindowExA USER32.dll::OpenClipboard USER32.dll::PeekMessageA USER32.dll::CreateWindowExA

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