MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 d539aa17bfa95bc25c81308a99a1c834cb28ad23f1ce8bc3715066471bd5d0f7. 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: 14


Intelligence 14 IOCs YARA 1 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: d539aa17bfa95bc25c81308a99a1c834cb28ad23f1ce8bc3715066471bd5d0f7
SHA3-384 hash: d478d255c3ac1a0f4c4573bd120e16a5ce55c9745a0fdd626d46452fe2e6af8918b92409a35682daec960b9c81833fea
SHA1 hash: 3c5c933bf8b68b04f621a5c70c9562d06e857bbd
MD5 hash: c56f440f15955f0cae85df17d5a52140
humanhash: thirteen-oklahoma-bravo-utah
File name:d539aa17bfa95bc25c81308a99a1c834cb28ad23f1ce8bc3715066471bd5d0f7
Download: download sample
Signature GuLoader
Create hunting rule
File size:823'552 bytes
First seen:2024-11-06 14:38:44 UTC
Last seen:2024-11-07 14:20:54 UTC
File type:Executable exe
MIME type:application/x-dosexec
imphash f4639a0b3116c2cfc71144b88a929cfd (137 x GuLoader, 55 x Formbook, 40 x VIPKeylogger)
ssdeep 24576:qG+yqROz6skIpE2NVPl7LE8oy9jRKta3uja581CL:NMRnsn1NVt7L7o/ap
Threatray 350 similar samples on MalwareBazaar
TLSH T1710523014630E13BFCD68730C9B4EAA67A33DE241436655B4361FE4FB9B2740BA2E716
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):PE icon
dhash icon b2717169e8f4acf0 (4 x GuLoader)
Reporter adrian__luca
Tags:exe GuLoader

Intelligence

File Origin
# of uploads :
3
# of downloads :
405
Origin country :
HU HU
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
d539aa17bfa95bc25c81308a99a1c834cb28ad23f1ce8bc3715066471bd5d0f7
Verdict:
Suspicious activity
Analysis date:
2024-11-06 15:19:23 UTC
Tags:
n/a
Link:
https://app.any.run/tasks/e4fa8f4e-99ad-42a7-b051-1337639ad253

Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Detection(s):
SecuriteInfo.com.FileRepMalware.28774.14513.UNOFFICIAL
Create hunting rule

Verdict:
Malicious
Score:
92.5%
Link:
https://cyber-fortress.com/docs/result/index.php?id=672b7f908d23d90491345480
Tags:
injection exploit obfusc
Result
Verdict:
Suspicious
Maliciousness:

Behaviour
Creating a window
Creating a file
Creating a file in the Windows subdirectories
Delayed writing of the file
Verdict:
Likely Malicious
Threat level:
  7.5/10
Confidence:
100%
Tags:
installer microsoft_visual_cc overlay packed
Link:
https://www.filescan.io/uploads/672b7f89702fa4abc8c40764/reports/955b98da-c776-4d37-bf90-bbd5fb53a0dd/overview
Verdict:
Malicious
Labled as:
Trojan.Generic
Link:
https://www.hybrid-analysis.com/sample/d539aa17bfa95bc25c81308a99a1c834cb28ad23f1ce8bc3715066471bd5d0f7
Verdict:
Suspicious
Link:
https://analyze.intezer.com/analyses/f8b8e4e4-6435-4ac6-afea-9eb89d5fdc65
Result
Threat name:
GuLoader
Create hunting rule
Detection:
malicious
Classification:
troj.evad
Score:
80 / 100
Link:
https://www.joesandbox.com/analysis/1550265
Signature
AI detected suspicious sample
Antivirus / Scanner detection for submitted sample
Multi AV Scanner detection for submitted file
Opens the same file many times (likely Sandbox evasion)
Switches to a custom stack to bypass stack traces
Tries to detect virtualization through RDTSC time measurements
Yara detected GuLoader
Behaviour
Behavior Graph:
Download SVG
Score:
100%
Verdict:
Malware
File Type:
PE
Link:
https://malprob.io/report/d539aa17bfa95bc25c81308a99a1c834cb28ad23f1ce8bc3715066471bd5d0f7
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/d539aa17bfa95bc25c81308a99a1c834cb28ad23f1ce8bc3715066471bd5d0f7/
Threat name:
Win32.Trojan.Guloader
Create hunting rule
Status:
Malicious
First seen:
2024-10-29 11:45:36 UTC
AV detection:
16 of 36 (44.44%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=2u42uf57vfn4exebgcfjtioigtfsrljd6hhixq3rkbteog6v2d3q._file
Verdict:
malicious
Label(s):
cloudeye
Create hunting rule
Similar samples:
0645a7ba3f25c2f398a13f9d0d6701e9d3602044f3045f1ca1d598e08e4cde82
GuLoader
19b8eabc143b4307a4496fec6012965f918e18d0e33a989292568f37a4c5f1ba
GuLoader
5c165586ed7a8f62f8d8fe850d874ede748092d4dbf54667ce8b02b4081c4cfe
GuLoader
77f75d57217646debafefa81bb803dbabb9cbd67c8f99c4906ab91843e42a1b7
GuLoader
bdd5b953bef085550bb5891e8d3c7248b5b16fcbba1bb26e2be18c4801d1a98e
GuLoader
d539aa17bfa95bc25c81308a99a1c834cb28ad23f1ce8bc3715066471bd5d0f7
GuLoader
error
GuLoader
+ 340 additional samples on MalwareBazaar
Result
Malware family:
guloader
Create hunting rule
Score:
  10/10
Tags:
family:guloader discovery downloader
Link:
https://tria.ge/reports/241106-rz96mssaqh/
Behaviour
Enumerates physical storage devices
System Location Discovery: System Language Discovery
Drops file in Program Files directory
Drops file in Windows directory
Loads dropped DLL
Guloader family
Guloader,Cloudeye
Verdict:
Suspicious
Tags:
n/a
YARA:
n/a
Link:
https://app.threat.zone/submission/01659a4e-bbd1-43e5-93e6-a1efa1e7e54c
Unpacked files
SH256 hash:
23d618a0293c78ce00f7c6e6dd8b8923621da7dd1f63a070163ef4c0ec3033d6
MD5 hash:
192639861e3dc2dc5c08bb8f8c7260d5
SHA1 hash:
58d30e460609e22fa0098bc27d928b689ef9af78
Link:
https://www.unpac.me/results/8e5b681c-2e24-4d74-a55d-af3aa342e433/
SH256 hash:
d539aa17bfa95bc25c81308a99a1c834cb28ad23f1ce8bc3715066471bd5d0f7
MD5 hash:
c56f440f15955f0cae85df17d5a52140
SHA1 hash:
3c5c933bf8b68b04f621a5c70c9562d06e857bbd
Link:
https://www.unpac.me/results/8e5b681c-2e24-4d74-a55d-af3aa342e433/
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/d539aa17bfa95bc25c81308a99a1c834cb28ad23f1ce8bc3715066471bd5d0f7

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

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_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
SHELL_APIManipulates System ShellSHELL32.dll::ShellExecuteExW
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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