MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 af5bce0b855a401d84911a6e5f59de62aa695faf1102e8dc0658268e3635d5f7. 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 1 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: af5bce0b855a401d84911a6e5f59de62aa695faf1102e8dc0658268e3635d5f7
SHA3-384 hash: 3f1f47719c2b91426c344a0c273f8e74e79082602780f4c0bf67cca3ce30b4be4a87b92dd05d8fa299705df0e5752f5d
SHA1 hash: b8de5071a572ae1321950c34313ac28813a46216
MD5 hash: 3c3459ff50818a483c309a12e2078152
humanhash: princess-tennessee-berlin-sweet
File name:doc20240715-00014.bat
Download: download sample
Signature GuLoader
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File size:476'299 bytes
First seen:2024-07-15 09:32:59 UTC
Last seen:2024-07-24 20:19:04 UTC
File type:Executable exe
MIME type:application/x-dosexec
imphash e2a592076b17ef8bfb48b7e03965a3fc (385 x GuLoader, 58 x RemcosRAT, 40 x AgentTesla)
ssdeep 6144:GpkXGhIfigEMBI8Eh9xWgN90AZhRlvJ9PsvkkKOuzGY+uY1pEFMufdiBffv/+:/9KgEMUWgVVlvJ2vkgmGtFXEPdsW
TLSH T148A40261B7E0D071C2640BBB1CB2EC729265FC2BBE558F032391BFA9393E55D5426326
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)
Reporter JAMESWT_WT
Tags:exe GuLoader

Intelligence

File Origin
# of uploads :
3
# of downloads :
450
Origin country :
IT IT
Vendor Threat Intelligence
Malware family:
guloader
Create hunting rule
ID:
1
File name:
af5bce0b855a401d84911a6e5f59de62aa695faf1102e8dc0658268e3635d5f7.exe
Verdict:
Malicious activity
Analysis date:
2024-07-15 10:50:44 UTC
Tags:
guloader
Link:
https://app.any.run/tasks/d5278494-9c93-4d32-adc7-d2023c33af47

Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Detection(s):
SecuriteInfo.com.Trojan.NSIS.Guloader.19331.2636.UNOFFICIAL
Create hunting rule

Verdict:
Malicious
Score:
90.2%
Link:
https://cyber-fortress.com/docs/result/index.php?id=6694eccf84e955866872b367win7simulatehigh_evasion
Tags:
Encryption Stealth Heur
Result
Verdict:
Clean
Maliciousness:

Behaviour
Searching for the window
Creating a window
Creating a file in the %temp% subdirectories
Creating a file in the %AppData% subdirectories
Creating a file
Сreating synchronization primitives
Delayed reading of the file
Verdict:
Malicious
Threat level:
  10/10
Confidence:
100%
Tags:
installer lolbin masquerade microsoft_visual_cc overlay packed shell32
Link:
https://www.filescan.io/uploads/6694ece2f4acda707fe328e3/reports/280f87f0-e907-461b-85f1-23e201c653d6/overview
Verdict:
Malicious
Labled as:
Malware
Link:
https://www.hybrid-analysis.com/sample/af5bce0b855a401d84911a6e5f59de62aa695faf1102e8dc0658268e3635d5f7
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:
Unknown
Link:
https://analyze.intezer.com/analyses/720f846b-87d5-4a61-b0a5-384d2e3ecbfa
Result
Threat name:
GuLoader
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Detection:
malicious
Classification:
troj.evad.spyw
Score:
92 / 100
Link:
https://www.joesandbox.com/analysis/1473461
Signature
Check if machine is in data center or colocation facility
Machine Learning detection for sample
Multi AV Scanner detection for submitted file
Queries sensitive network adapter information (via WMI, Win32_NetworkAdapter, often done to detect virtual machines)
Switches to a custom stack to bypass stack traces
Tries to harvest and steal browser information (history, passwords, etc)
Tries to harvest and steal ftp login credentials
Tries to harvest and steal Putty / WinSCP information (sessions, passwords, etc)
Tries to steal Mail credentials (via file / registry access)
Writes to foreign memory regions
Yara detected GuLoader
Behaviour
Behavior Graph:
Download SVG
Score:
100%
Verdict:
Malware
File Type:
PE
Link:
https://malprob.io/report/af5bce0b855a401d84911a6e5f59de62aa695faf1102e8dc0658268e3635d5f7
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/af5bce0b855a401d84911a6e5f59de62aa695faf1102e8dc0658268e3635d5f7/
Threat name:
Win32.Trojan.GuLoader
Create hunting rule
Status:
Malicious
First seen:
2024-07-15 07:46:11 UTC
File Type:
PE (Exe)
Extracted files:
12
AV detection:
19 of 24 (79.17%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=v5n44c4fljab3berdjxf6wo6mkvgsx5pceborxaglati4nrv2x3q._file
Verdict:
malicious
Label(s):
cloudeye
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Result
Malware family:
guloader
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Score:
  10/10
Tags:
family:agenttesla family:guloader downloader keylogger spyware stealer trojan
Link:
https://tria.ge/reports/240715-lh7fjazbrl/
Behaviour
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: MapViewOfSection
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
Enumerates physical storage devices
Suspicious use of NtCreateThreadExHideFromDebugger
Suspicious use of NtSetInformationThreadHideFromDebugger
Suspicious use of SetThreadContext
Looks up external IP address via web service
Loads dropped DLL
AgentTesla
Guloader,Cloudeye
Verdict:
Suspicious
Tags:
n/a
YARA:
n/a
Link:
https://app.threat.zone/submission/96de9c0c-8c8d-4172-8b8c-2ef0802ba07f
Unpacked files
SH256 hash:
2e226715419a5882e2e14278940ee8ef0aa648a3ef7af5b3dc252674111962bc
MD5 hash:
a4dd044bcd94e9b3370ccf095b31f896
SHA1 hash:
17c78201323ab2095bc53184aa8267c9187d5173
Link:
https://www.unpac.me/results/58d9ac61-2250-4a24-b005-9b4375dd593b/
SH256 hash:
8eb85584031b2e1d74daf372e60a72f767e8861db9d4ca2dc1981511f620e51e
MD5 hash:
744f9c42403e9aabde8fc65d40bccd3e
SHA1 hash:
9ab49924ffa1560e5e3b70b097236a1451945829
Link:
https://www.unpac.me/results/58d9ac61-2250-4a24-b005-9b4375dd593b/
SH256 hash:
067c77d51df034b4a614f83803140fbf4cd2f8684b88ea8c8acdf163edad085a
MD5 hash:
0d45588070cf728359055f776af16ec4
SHA1 hash:
c4375ceb2883dee74632e81addbfa4e8b0c6d84a
Link:
https://www.unpac.me/results/58d9ac61-2250-4a24-b005-9b4375dd593b/
SH256 hash:
af5bce0b855a401d84911a6e5f59de62aa695faf1102e8dc0658268e3635d5f7
MD5 hash:
3c3459ff50818a483c309a12e2078152
SHA1 hash:
b8de5071a572ae1321950c34313ac28813a46216
Link:
https://www.unpac.me/results/58d9ac61-2250-4a24-b005-9b4375dd593b/
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Malicious File
Score:
0.94
Link:
https://yomi.yoroi.company/submissions/af5bce0b855a401d84911a6e5f59de62aa695faf1102e8dc0658268e3635d5f7

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:NSIS_April_2024
Create hunting rule
Author:NDA0N
Description:Detects NSIS installers

File information

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

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_AUTHENTICODEMissing Authenticodehigh
CHECK_DLL_CHARACTERISTICSMissing dll Security Characteristics (HIGH_ENTROPY_VA)high
Reviews
IDCapabilitiesEvidence
COM_BASE_APICan Download & Execute componentsole32.dll::CoCreateInstance
SECURITY_BASE_APIUses Security Base APIADVAPI32.dll::AdjustTokenPrivileges
ADVAPI32.dll::SetFileSecurityW
SHELL_APIManipulates System ShellSHELL32.dll::ShellExecuteW
SHELL32.dll::SHFileOperationW
SHELL32.dll::SHGetFileInfoW
WIN32_PROCESS_APICan Create Process and ThreadsKERNEL32.dll::CreateProcessW
ADVAPI32.dll::OpenProcessToken
KERNEL32.dll::CloseHandle
KERNEL32.dll::CreateThread
WIN_BASE_APIUses Win Base APIKERNEL32.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::MoveFileExW
WIN_BASE_USER_APIRetrieves Account InformationADVAPI32.dll::LookupPrivilegeValueW
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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