MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 4c31167d6e80129a4f8ebeae1c6e3109b7d0a19dc33f126d6083cec4795448c7. 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: 12


Intelligence 12 IOCs YARA 2 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 4c31167d6e80129a4f8ebeae1c6e3109b7d0a19dc33f126d6083cec4795448c7
SHA3-384 hash: b918b2c5e91358cb0ff2a6397e73d1d919a1f1f55afc4f7ace84b3d089ab165d9a4ddd71ebea1531bad3bc148fe79c58
SHA1 hash: 4ef894c198e26dd1211a1bccd585cf570e1b0a06
MD5 hash: 03398a60158c06500c3b628f7c6e61a9
humanhash: kentucky-nine-table-football
File name:Nationalbankdirektrernes.exe
Download: download sample
Signature GuLoader
Create hunting rule
File size:1'248'336 bytes
First seen:2025-05-15 18:50:46 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash 7ed0d71376e55d58ab36dc7d3ffda898 (133 x GuLoader, 28 x RemcosRAT, 23 x AgentTesla)
ssdeep 24576:0hl1s7PPMbGwKOErmz/ka5/t0moAp3nadNxkrDKWyD71yClkZ:OltSwS6Lka56mnnadNae1/lkZ
TLSH T1364523522FC8E1A7DE4ECCB59BBAD2AAF6ABFC500910400F39543F056E36951CE36746
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 f3f8b9f4f4ea7a2e (2 x GuLoader, 2 x AgentTesla)
Reporter burger
Tags:exe GuLoader signed

Code Signing Certificate

Organisation:skrofuls
Issuer:skrofuls
Algorithm:sha256WithRSAEncryption
Valid from:2025-04-25T01:58:45Z
Valid to:2026-04-25T01:58:45Z
Serial number: 5f202da5c4be9fd796e2a3df49bac53005d3b54f
Thumbprint Algorithm:SHA256
Thumbprint: 605d3189a6a9d2316110fa013c4af87e85b88ed013958977b12ab580eab6c897
Source:This information was brought to you by ReversingLabs A1000 Malware Analysis Platform

Intelligence

File Origin
# of uploads :
1
# of downloads :
484
Origin country :
NL NL
Vendor Threat Intelligence
Malware family:
guloader
Create hunting rule
ID:
1
File name:
Nationalbankdirektrernes.exe
Verdict:
Malicious activity
Analysis date:
2025-05-15 18:54:42 UTC
Tags:
guloader evasion stealer ftp exfiltration agenttesla
Link:
https://app.any.run/tasks/9f092248-7df0-4137-81b0-4cd4601f9be6

Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Detection(s):
SecuriteInfo.com.Win32.Evo-gen.11471.7870.UNOFFICIAL
Create hunting rule

Verdict:
Clean
Score:
99.9%
Link:
https://cyber-fortress.com/docs/result/index.php?id=6826385e4a59e5a2ce04f00f
Tags:
n/a
Result
Verdict:
Clean
Maliciousness:

Behaviour
Creating a window
Creating a file
Searching for the window
Creating a file in the %temp% subdirectories
Verdict:
Suspicious
Threat level:
  5/10
Confidence:
100%
Tags:
adaptive-context blackhole installer microsoft_visual_cc overlay overlay signed
Link:
https://www.filescan.io/uploads/682637a3c609634bd7c42e23/reports/9accf050-af7b-4d50-9071-49de89023777/overview
Verdict:
Malicious
Labled as:
Win/malicious_confidence_90%
Link:
https://www.hybrid-analysis.com/sample/4c31167d6e80129a4f8ebeae1c6e3109b7d0a19dc33f126d6083cec4795448c7
Verdict:
Suspicious
Link:
https://analyze.intezer.com/analyses/84412397-029a-4a27-a1b2-c021ab560701
Result
Threat name:
GuLoader
Create hunting rule
Detection:
malicious
Classification:
troj.spyw.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1691127
Signature
AI detected suspicious PE digital signature
Check if machine is in data center or colocation facility
Joe Sandbox ML detected suspicious sample
Multi AV Scanner detection for submitted file
Queries sensitive network adapter information (via WMI, Win32_NetworkAdapter, often done to detect virtual machines)
Queries sensitive video device information (via WMI, Win32_VideoController, often done to detect virtual machines)
Switches to a custom stack to bypass stack traces
Tries to detect sandboxes and other dynamic analysis tools (process name or module or function)
Tries to detect virtualization through RDTSC time measurements
Tries to harvest and steal browser information (history, passwords, etc)
Tries to steal Mail credentials (via file / registry access)
Yara detected GuLoader
Behaviour
Behavior Graph:
Download SVG
Score:
94%
Verdict:
Malware
File Type:
PE
Link:
https://malprob.io/report/4c31167d6e80129a4f8ebeae1c6e3109b7d0a19dc33f126d6083cec4795448c7
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/4c31167d6e80129a4f8ebeae1c6e3109b7d0a19dc33f126d6083cec4795448c7/
Threat name:
Win32.Trojan.Kepavll
Create hunting rule
Status:
Malicious
First seen:
2025-05-15 14:18:21 UTC
File Type:
PE (Exe)
Extracted files:
17
AV detection:
17 of 24 (70.83%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=jqyrm7loqajjut4ox2xby3rrbg35bim5ym7re3laqphmi6kujddq._file
Result
Malware family:
guloader
Create hunting rule
Score:
  10/10
Tags:
family:agenttesla family:guloader discovery downloader keylogger spyware stealer trojan
Link:
https://tria.ge/reports/250515-xhldvacp8w/
Behaviour
Enumerates physical storage devices
System Location Discovery: System Language Discovery
Drops file in Program Files directory
Looks up external IP address via web service
Loads dropped DLL
AgentTesla
Agenttesla family
Guloader family
Guloader,Cloudeye
Verdict:
Malicious
Tags:
n/a
YARA:
n/a
Link:
https://app.threat.zone/submission/e5df4d28-f142-47b8-8e38-3c0ae0e51a88
Unpacked files
SH256 hash:
4c31167d6e80129a4f8ebeae1c6e3109b7d0a19dc33f126d6083cec4795448c7
MD5 hash:
03398a60158c06500c3b628f7c6e61a9
SHA1 hash:
4ef894c198e26dd1211a1bccd585cf570e1b0a06
Link:
https://www.unpac.me/results/ee679492-f355-4a0c-8de2-c274791cf75c/
SH256 hash:
df5ae79fa558dc7af244ec6e53939563b966e7dbd8867e114e928678dbd56e5d
MD5 hash:
ca332bb753b0775d5e806e236ddcec55
SHA1 hash:
f35ef76592f20850baef2ebbd3c9a2cfb5ad8d8f
Link:
https://www.unpac.me/results/ee679492-f355-4a0c-8de2-c274791cf75c/
Malware family:
GuLoader
Create hunting rule
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/4c31167d6e80/report/overview.html
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: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.

Web download

GuLoader

Executable exe 4c31167d6e80129a4f8ebeae1c6e3109b7d0a19dc33f126d6083cec4795448c7

(this sample)

  
URLhaus
https://urlhaus.abuse.ch/url/3544190/
  
Delivery method
Distributed via web download

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
SHELL_APIManipulates System ShellSHELL32.dll::ShellExecuteW
SHELL32.dll::SHFileOperationW
SHELL32.dll::SHGetFileInfoW
WIN32_PROCESS_APICan Create Process and ThreadsKERNEL32.dll::CreateProcessW
KERNEL32.dll::CloseHandle
KERNEL32.dll::CreateThread
WIN_BASE_APIUses Win Base APIKERNEL32.dll::LoadLibraryW
KERNEL32.dll::LoadLibraryA
KERNEL32.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::GetWindowsDirectoryW
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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