MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 27f53d2b44682a7c59cdb0a74f4f38cf9e32b2510cf44b6cc4c8bf144c4cd4d9. 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 2 File information Comments

SHA256 hash:	27f53d2b44682a7c59cdb0a74f4f38cf9e32b2510cf44b6cc4c8bf144c4cd4d9
SHA3-384 hash:	a76443d5d7041f39ec8957e6bad0b35bf35d0131ca9a5eed8238e492c2f6ab96222c0b7ec54277d02847ab5cfab5f60d
SHA1 hash:	135a2a73df2c5749a9314704fe3bfe20af6897ed
MD5 hash:	5bd638fa4b06963a5b1468857b2ba124
humanhash:	sad-lactose-mockingbird-oxygen
File name:	Arrival_Notice.bat.exe
Download:	download sample
Signature	GuLoader Create hunting rule
File size:	532'737 bytes
First seen:	2025-07-21 17:30:48 UTC
Last seen:	2025-08-12 13:58:08 UTC
File type:	exe
MIME type:	application/x-dosexec
imphash	1f23f452093b5c1ff091a2f9fb4fa3e9 (303 x GuLoader, 47 x AgentTesla, 47 x RemcosRAT)
ssdeep	12288:7/ICLblzCiSU729p8j3uPcGJ+BVeM9194IL+sKkc6fJh:7/ICBCiSyg8j3ocee94IL+sbBh
Threatray	4'318 similar samples on MalwareBazaar
TLSH	T179B423047BA8C635EB6109300E36677A53F9D4B62A62D38F27909B4C7EB31819E1D3F5
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	c4dadadad2f492c2 (149 x GuLoader, 51 x RemcosRAT, 23 x VIPKeylogger)
Reporter	James_inthe_box
Tags:	exe GuLoader

Intelligence

File Origin

# of uploads :

# of downloads :

Origin country :

Vendor Threat Intelligence

Malware family:

remcos

ID:

File name:

Arrival_Notice.bat.exe

Verdict:

Malicious activity

Analysis date:

2025-07-21 17:34:25 UTC

Tags:

rat remcos

Link:

https://app.any.run/tasks/3d1572db-91ed-4a29-b6ec-4082fa0da2e3

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/16142/

Verdict:

Clean

Score:

89.3%

Link:

https://cyber-fortress.com/docs/result/index.php?id=687e79eb2f623871a5f1569a

Tags:

n/a

Result

Verdict:

Clean

Maliciousness:

Behaviour

Creating a file in the %temp% directory

Creating a window

Searching for the window

Creating a file

Delayed reading of the file

Sending a custom TCP request

Verdict:

Likely Malicious

Threat level:

7.5/10

Confidence:

100%

Tags:

installer microsoft_visual_cc obfuscated overlay packed packer_detected

Link:

https://www.filescan.io/uploads/687e79768a7d628a81ba88db/reports/772e14ee-e8f7-425f-80de-5d56260ebb3f/overview

Verdict:

Malicious

Labled as:

Win/malicious_confidence_60%

Link:

https://www.hybrid-analysis.com/sample/27f53d2b44682a7c59cdb0a74f4f38cf9e32b2510cf44b6cc4c8bf144c4cd4d9

Verdict:

Suspicious

Link:

https://analyze.intezer.com/analyses/701c26b1-b744-4c56-9c64-b6719aa886ef

Score:

96%

Verdict:

Malware

File Type:

Link:

https://malprob.io/report/27f53d2b44682a7c59cdb0a74f4f38cf9e32b2510cf44b6cc4c8bf144c4cd4d9

Verdict:

inconclusive

YARA:

5 match(es)

Tags:

Executable PE (Portable Executable) Win 32 Exe x86

Link:

https://app.malva.re/file/5bd638fa4b06963a5b1468857b2ba124

Detection:

n/a

Link:

https://mwdb.cert.pl/sample/27f53d2b44682a7c59cdb0a74f4f38cf9e32b2510cf44b6cc4c8bf144c4cd4d9/

Verdict:

Malicious

Threat:

Trojan.NSIS.Makoob

Link:

https://tip.neiki.dev/file/27f53d2b44682a7c59cdb0a74f4f38cf9e32b2510cf44b6cc4c8bf144c4cd4d9

Threat name:

Win32.Trojan.Generic

Status:

Suspicious

First seen:

2025-07-21 17:30:36 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=e72t2k2enavhywonwctu6tzyz6pdfmsrbt2ew3gezc7ritcm2tmq._file

Verdict:

malicious

Label(s):

cloudeye

Result

Malware family:

remcos

Score:

10/10

Tags:

family:remcos collection discovery rat

Link:

https://tria.ge/reports/250721-v3x72ahp4s/

Behaviour

Suspicious behavior: EnumeratesProcesses

Suspicious behavior: MapViewOfSection

Suspicious use of AdjustPrivilegeToken

Suspicious use of SetWindowsHookEx

Suspicious use of WriteProcessMemory

Enumerates physical storage devices

System Location Discovery: System Language Discovery

Suspicious use of NtCreateThreadExHideFromDebugger

Suspicious use of NtSetInformationThreadHideFromDebugger

Suspicious use of SetThreadContext

Accesses Microsoft Outlook accounts

Legitimate hosting services abused for malware hosting/C2

Loads dropped DLL

Detected Nirsoft tools

NirSoft MailPassView

NirSoft WebBrowserPassView

Remcos

Remcos family

Verdict:

Suspicious

Tags:

n/a

YARA:

n/a

Link:

https://app.threat.zone/submission/6089fb21-9f68-481e-b2d0-2fdae37073d5

Unpacked files

SH256 hash:

27f53d2b44682a7c59cdb0a74f4f38cf9e32b2510cf44b6cc4c8bf144c4cd4d9

MD5 hash:

5bd638fa4b06963a5b1468857b2ba124

SHA1 hash:

135a2a73df2c5749a9314704fe3bfe20af6897ed

Link:

https://www.unpac.me/results/d1ac47c9-6fe2-45d8-909c-f1cf1150be69/

SH256 hash:

a632d74332b3f08f834c732a103dafeb09a540823a2217ca7f49159755e8f1d7

MD5 hash:

75ed96254fbf894e42058062b4b4f0d1

SHA1 hash:

996503f1383b49021eb3427bc28d13b5bbd11977

Link:

https://www.unpac.me/results/d1ac47c9-6fe2-45d8-909c-f1cf1150be69/

Please note that we are no longer able to provide a coverage score for Virus Total.

Threat name:

Malicious File

Score:

0.79

Link:

https://yomi.yoroi.company/submissions/27f53d2b44682a7c59cdb0a74f4f38cf9e32b2510cf44b6cc4c8bf144c4cd4d9

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:	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.

Cape

https://www.capesandbox.com/analysis/16142/

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
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::MoveFileExW KERNEL32.dll::MoveFileW
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

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