MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 77f75d57217646debafefa81bb803dbabb9cbd67c8f99c4906ab91843e42a1b7. 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 1 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 77f75d57217646debafefa81bb803dbabb9cbd67c8f99c4906ab91843e42a1b7
SHA3-384 hash: 47b1c12cd8282aadbb7d0ff714d4359be032d2e1f4f38960500eed6a5fb30863ffa889280fd94d9eabb1ae97644ae7c2
SHA1 hash: da417e45e3136848914e0004b2f0ac4a50168d58
MD5 hash: 95456fdd4cec234b22658709cafdff50
humanhash: finch-march-bluebird-spring
File name:E-dekont_pdf.exe
Download: download sample
Signature GuLoader
Create hunting rule
File size:555'515 bytes
First seen:2024-06-13 10:11:10 UTC
Last seen:2024-06-13 10:29:05 UTC
File type:Executable exe
MIME type:application/x-dosexec
imphash f4639a0b3116c2cfc71144b88a929cfd (137 x GuLoader, 55 x Formbook, 40 x VIPKeylogger)
ssdeep 12288:eGLutMahZo88x1jWAIxqlD0hh3zPIrZLbDSf:eGLAXZ+xlWAqe4CZLbDc
TLSH T1F3C40153F79D985FD4900170446E999BD7B0DEB418F545133F8A7C3AF83A32A8E2DA88
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):PE icon
dhash icon d42d6d2b89c2d870 (2 x GuLoader, 1 x AgentTesla)
Reporter abuse_ch
Tags:exe geo GuLoader TUR

Intelligence

File Origin
# of uploads :
2
# of downloads :
366
Origin country :
NL NL
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
77f75d57217646debafefa81bb803dbabb9cbd67c8f99c4906ab91843e42a1b7.exe
Verdict:
Malicious activity
Analysis date:
2024-06-13 10:43:47 UTC
Tags:
n/a
Link:
https://app.any.run/tasks/a3d5b69c-14c4-4080-b293-650a0d2793d5

Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Detection(s):
SecuriteInfo.com.FileRepMalware.15891.18313.UNOFFICIAL
Create hunting rule

Verdict:
Malicious
Score:
92.5%
Link:
https://cyber-fortress.com/docs/result/index.php?id=666ac68ada262547655efc1ewin7simulatehigh_evasion
Tags:
Encryption Stealth Inject
Result
Verdict:
Clean
Maliciousness:

Behaviour
Creating a window
Searching for the window
Creating a file
Creating a file in the %temp% subdirectories
Verdict:
Likely Malicious
Threat level:
  7.5/10
Confidence:
100%
Tags:
installer lolbin masquerade microsoft_visual_cc overlay packed shell32
Link:
https://www.filescan.io/uploads/666ac5fa21581a92819cb2da/reports/4f1552a1-b605-418f-86bd-7f1447f8ec6a/overview
Verdict:
Malicious
Labled as:
Win/malicious_confidence_90%
Link:
https://www.hybrid-analysis.com/sample/77f75d57217646debafefa81bb803dbabb9cbd67c8f99c4906ab91843e42a1b7
Verdict:
Unknown
Link:
https://analyze.intezer.com/analyses/ec0dd271-83ba-48a6-8c31-78582291e94b
Result
Threat name:
GuLoader
Create hunting rule
Detection:
malicious
Classification:
troj.evad
Score:
72 / 100
Link:
https://www.joesandbox.com/analysis/1456509
Signature
AI detected suspicious sample
Initial sample is a PE file and has a suspicious name
Machine Learning detection for sample
Multi AV Scanner detection for submitted file
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/77f75d57217646debafefa81bb803dbabb9cbd67c8f99c4906ab91843e42a1b7
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/77f75d57217646debafefa81bb803dbabb9cbd67c8f99c4906ab91843e42a1b7/
Threat name:
Win32.Trojan.Guloader
Create hunting rule
Status:
Malicious
First seen:
2024-06-12 15:19:17 UTC
File Type:
PE (Exe)
Extracted files:
13
AV detection:
18 of 24 (75.00%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=o73v2vzbozdn5ox67ka3xab5xk5zzplhzd4zysigvoiyipscug3q._file
Verdict:
malicious
Result
Malware family:
n/a
Score:
  7/10
Tags:
n/a
Link:
https://tria.ge/reports/240613-l8jr6athpd/
Behaviour
Suspicious behavior: MapViewOfSection
Suspicious use of WriteProcessMemory
Enumerates physical storage devices
Drops file in Windows directory
Suspicious use of NtSetInformationThreadHideFromDebugger
Suspicious use of SetThreadContext
Loads dropped DLL
Verdict:
Suspicious
Tags:
n/a
YARA:
n/a
Link:
https://app.threat.zone/submission/7524d6df-1c13-4193-a8f8-80438002bcb2
Unpacked files
SH256 hash:
9111099efe9d5c9b391dc132b2faf0a3851a760d4106d5368e30ac744eb42706
MD5 hash:
4add245d4ba34b04f213409bfe504c07
SHA1 hash:
ef756d6581d70e87d58cc4982e3f4d18e0ea5b09
Link:
https://www.unpac.me/results/82469e51-1174-40a4-ab87-36b2676b8f0c/
SH256 hash:
77f75d57217646debafefa81bb803dbabb9cbd67c8f99c4906ab91843e42a1b7
MD5 hash:
95456fdd4cec234b22658709cafdff50
SHA1 hash:
da417e45e3136848914e0004b2f0ac4a50168d58
Link:
https://www.unpac.me/results/82469e51-1174-40a4-ab87-36b2676b8f0c/
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/77f75d57217646debafefa81bb803dbabb9cbd67c8f99c4906ab91843e42a1b7

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
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

Comments