MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 a1f60afcf5d8ef739f2d547be2c8ce526c2aaccfaf1983f2e6a955ec6379affd. 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: 16

Intelligence 16 IOCs YARA 2 File information Comments

SHA256 hash:	a1f60afcf5d8ef739f2d547be2c8ce526c2aaccfaf1983f2e6a955ec6379affd
SHA3-384 hash:	1f398282658bb52d79643901098610bef0fbc60a2d4c8977716daa6cd68024d4b1b0dccd982b357e34374ef91992c1ad
SHA1 hash:	091517c4f25749ec11cbc04a1436455231b3bedf
MD5 hash:	45bf52f78adb38d4a8aab2b184c34eda
humanhash:	bacon-comet-twelve-sad
File name:	Quotation No.VFLOIPS31052024-1_PDF.exe
Download:	download sample
Signature	GuLoader Create hunting rule
File size:	1'211'611 bytes
First seen:	2024-08-13 13:16:17 UTC
Last seen:	Never
File type:	exe
MIME type:	application/x-dosexec
imphash	b78ecf47c0a3e24a6f4af114e2d1f5de (304 x GuLoader, 23 x Formbook, 21 x RemcosRAT)
ssdeep	24576:1mASOcxHPL8Dm8Ax6KO+ZPwHs6mxSFrJ7nEZoina+q+D:1mJrLQQxzPWZtr5EfnaX+D
TLSH	T18245334E79CD44DDE9DB7F702DB382B697929738AAA5314307508EDF8CB1890F8546C2
TrID	47.3% (.EXE) Win32 Executable MS Visual C++ (generic) (31206/45/13) 15.9% (.EXE) Win64 Executable (generic) (10523/12/4) 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)
File icon (PE):
dhash icon	80c1d0d890a4b819 (2 x GuLoader)
Reporter	James_inthe_box
Tags:	exe GuLoader

Intelligence

File Origin

# of uploads :

# of downloads :

404

Origin country :

Vendor Threat Intelligence

Malware family:

guloader

ID:

File name:

Quotation No.VFLOIPS31052024-1_PDF.exe

Verdict:

Malicious activity

Analysis date:

2024-08-13 13:19:56 UTC

Tags:

guloader

Link:

https://app.any.run/tasks/53ab3b62-2d69-4c88-a2da-299fe403bc1a

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:

90.2%

Link:

https://cyber-fortress.com/docs/result/index.php?id=66bb5cd0aa5b40be0aa026e7

Tags:

Encryption Nekark

Result

Verdict:

Clean

Maliciousness:

Behaviour

Creating a window

Creating a file in the %AppData% subdirectories

Creating a file in the %temp% directory

Creating a file

Delayed reading of the file

Verdict:

Likely Malicious

Threat level:

7.5/10

Confidence:

100%

Tags:

installer masquerade microsoft_visual_cc overlay packed

Link:

https://www.filescan.io/uploads/66bb5cd032f6d05ff3cc319c/reports/6fc19879-f286-413a-98c5-4c5742cec93f/overview

Verdict:

Malicious

Labled as:

Malware

Link:

https://www.hybrid-analysis.com/sample/a1f60afcf5d8ef739f2d547be2c8ce526c2aaccfaf1983f2e6a955ec6379affd

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/0ce1c986-02b2-4edf-93ff-371f9dbeb24a

Result

Threat name:

GuLoader, Snake Keylogger, VIP Keylogger

Detection:

malicious

Classification:

troj.evad.spyw

Score:

100 / 100

Link:

https://www.joesandbox.com/analysis/1492184

Signature

Antivirus detection for URL or domain

Initial sample is a PE file and has a suspicious name

Multi AV Scanner detection for submitted file

Switches to a custom stack to bypass stack traces

Tries to detect the country of the analysis system (by using the IP)

Tries to harvest and steal browser information (history, passwords, etc)

Tries to steal Mail credentials (via file / registry access)

Uses the Telegram API (likely for C&C communication)

Yara detected GuLoader

Yara detected Snake Keylogger

Yara detected Telegram RAT

Yara detected VIP Keylogger

Behaviour

Behavior Graph:

Download SVG

Score:

84%

Verdict:

Malware

File Type:

Link:

https://malprob.io/report/a1f60afcf5d8ef739f2d547be2c8ce526c2aaccfaf1983f2e6a955ec6379affd

Detection:

n/a

Link:

https://mwdb.cert.pl/sample/a1f60afcf5d8ef739f2d547be2c8ce526c2aaccfaf1983f2e6a955ec6379affd/

Threat name:

Win32.Trojan.Guloader

Status:

Malicious

First seen:

2024-08-12 23:30:38 UTC

File Type:

PE (Exe)

Extracted files:

134

AV detection:

18 of 24 (75.00%)

Threat level:

5/5

Detection(s):

Suspicious file

Link:

https://check.spamhaus.org/check/?searchterm=uh3av7hv3dxxhhznkr56fsgokjwcvlgpv4myh4xgvfk6yy3zv76q._file

Verdict:

malicious

Label(s):

cloudeye

Result

Malware family:

guloader

Score:

10/10

Tags:

family:guloader discovery downloader

Link:

https://tria.ge/reports/240813-qjcprszfmr/

Behaviour

Suspicious behavior: EnumeratesProcesses

Suspicious behavior: MapViewOfSection

Suspicious use of AdjustPrivilegeToken

Suspicious use of WriteProcessMemory

Enumerates physical storage devices

Program crash

System Location Discovery: System Language Discovery

Suspicious use of NtCreateThreadExHideFromDebugger

Suspicious use of NtSetInformationThreadHideFromDebugger

Suspicious use of SetThreadContext

Legitimate hosting services abused for malware hosting/C2

Looks up external IP address via web service

Loads dropped DLL

Guloader,Cloudeye

Verdict:

Malicious

Tags:

n/a

YARA:

n/a

Link:

https://app.threat.zone/submission/f1f3daf5-3752-4c89-90bd-7d7e12ec32fc

Unpacked files

SH256 hash:

fa4ab1d6f79fd677433a31ada7806373a789d34328da46ccb0449bbf347bd73e

MD5 hash:

3f176d1ee13b0d7d6bd92e1c7a0b9bae

SHA1 hash:

fe582246792774c2c9dd15639ffa0aca90d6fd0b

Link:

https://www.unpac.me/results/062863c6-1323-4a17-8664-9a57794fdf54/

SH256 hash:

a1f60afcf5d8ef739f2d547be2c8ce526c2aaccfaf1983f2e6a955ec6379affd

MD5 hash:

45bf52f78adb38d4a8aab2b184c34eda

SHA1 hash:

091517c4f25749ec11cbc04a1436455231b3bedf

Link:

https://www.unpac.me/results/062863c6-1323-4a17-8664-9a57794fdf54/

Malware family:

GuLoader

Verdict:

Malicious

Link:

https://www.vmray.com/analyses/_mb/a1f60afcf5d8/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/a1f60afcf5d8ef739f2d547be2c8ce526c2aaccfaf1983f2e6a955ec6379affd

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

File information

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

Malspam

GuLoader

exe a1f60afcf5d8ef739f2d547be2c8ce526c2aaccfaf1983f2e6a955ec6379affd

(this sample)

Delivery method

Distributed via e-mail attachment

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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