MalwareBazaar Database
You are currently viewing the MalwareBazaar entry for SHA256 dd39d251c8d31fdcd410940c7e3a6b1ec76c62b341c60810215da5434d2cb52a. 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
| SHA256 hash: | dd39d251c8d31fdcd410940c7e3a6b1ec76c62b341c60810215da5434d2cb52a |
|---|---|
| SHA3-384 hash: | 675bdfebc3a6e8ffa1dce81c18ae8225b6c120a4f6e669473a90260760f470d9e6c3497fb3d27ca576914d55662485a2 |
| SHA1 hash: | 5bc32d174f3dc493312b330d01ceb55e58127f4c |
| MD5 hash: | 818e095a728bb7fde8d34c3276c01e15 |
| humanhash: | salami-july-uncle-indigo |
| File name: | rPurchaseOrderPO05232024.exe |
| Download: | download sample |
| Signature | GuLoader |
| File size: | 718'408 bytes |
| First seen: | 2024-05-23 12:27:53 UTC |
| Last seen: | 2024-05-23 13:32:48 UTC |
| File type: |  exe |
| MIME type: | application/x-dosexec |
| imphash | e2a592076b17ef8bfb48b7e03965a3fc (398 x GuLoader, 59 x RemcosRAT, 45 x AgentTesla) |
| ssdeep | 12288:bvp1DrAkngRmfxs7u//fARGujCxyIG1TxHhsS14P6bu4:TnDrA/mfWu/gnjNdNhd14CV |
| Threatray | 550 similar samples on MalwareBazaar |
| TLSH | T1C0E4D0417790E697D46D0F318DE7C2A12F77FD82AE022B973284B72F3C312516A26799 |
| 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 | bcb6b66ccc9c2c4c (1 x GuLoader, 1 x LummaStealer) |
| Reporter |  FXOLabs |
| Tags: | exe GuLoader signed |
Code Signing Certificate
| Organisation: | Nonrectangular |
|---|---|
| Issuer: | Nonrectangular |
| Algorithm: | sha256WithRSAEncryption |
| Valid from: | 2024-03-25T04:25:54Z |
| Valid to: | 2027-03-25T04:25:54Z |
| Serial number: | 5b5655d46aba5ac8380e003dd4fe63aef8af8a32 |
| Thumbprint Algorithm: | SHA256 |
| Thumbprint: | 267d6601e246622d8c78b98a1c7818ac9725b29003c8c5078ba3a72006657c5c |
| Source: | This information was brought to you by ReversingLabs A1000 Malware Analysis Platform |
Intelligence
File Origin
# of uploads :
2
# of downloads :
377
Origin country :
BRVendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
ab49c5ba806d4b3aef68b4a70c2ebb261f4b7cd6e74f3ec838c9d59aacf969c5.z
Verdict:
No threats detected
Analysis date:
2024-05-23 12:29:38 UTC
Tags:
n/a
Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Verdict:
Malicious
Score:
92.5%
Link:
Tags:
Encryption Static
Result
Verdict:
Clean
Maliciousness:
Behaviour
Creating a window
Creating a file in the %AppData% subdirectories
Delayed reading of the file
Creating a file in the %temp% subdirectories
Verdict:
Likely Malicious
Threat level:
7.5/10
Confidence:
100%
Tags:
installer lolbin masquerade overlay packed shell32
Verdict:
Malicious
Labled as:
Win/malicious_confidence_90%
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
Result
Threat name:
GuLoader, AgentTesla
Detection:
malicious
Classification:
troj.evad.spyw
Score:
100 / 100
Signature
Antivirus / Scanner detection for submitted sample
Check if machine is in data center or colocation facility
Found malware configuration
Initial sample is a PE file and has a suspicious name
Installs a global keyboard hook
Multi AV Scanner detection for submitted file
Queries sensitive network adapter information (via WMI, Win32_NetworkAdapter, often done to detect virtual machines)
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)
Yara detected AgentTesla
Yara detected GuLoader
Behaviour
Behavior Graph:
Score:
97%
Verdict:
Malware
File Type:
PE
Threat name:
Win32.Trojan.GULoader
Status:
Malicious
First seen:
2024-05-23 10:44:18 UTC
File Type:
PE (Exe)
Extracted files:
7
AV detection:
16 of 24 (66.67%)
Threat level:
5/5
Detection(s):
Suspicious file
Verdict:
malicious
Label(s):
cloudeye
Similar samples:
+ 540 additional samples on MalwareBazaar
Result
Malware family:
guloader
Score:
10/10
Tags:
family:guloader downloader
Behaviour
Modifies system certificate store
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
Guloader,Cloudeye
Verdict:
Suspicious
Tags:
n/a
YARA:
n/a
Unpacked files
SH256 hash:
982c5fb7ada7d8c9bc3e419d1c35da6f05bc5dd845940c179af3a33d00a36a8b
MD5 hash:
0ff2d70cfdc8095ea99ca2dabbec3cd7
SHA1 hash:
10c51496d37cecd0e8a503a5a9bb2329d9b38116
SH256 hash:
ee052fd5141bf769b841846170aabf0d7c2bb922c74c623c3f109344534f7a70
MD5 hash:
01e76fe9d2033606a48d4816bd9c2d9d
SHA1 hash:
e46d8a9ed4d5da220c81baf5f1fdb94708e9aba2
SH256 hash:
dd39d251c8d31fdcd410940c7e3a6b1ec76c62b341c60810215da5434d2cb52a
MD5 hash:
818e095a728bb7fde8d34c3276c01e15
SHA1 hash:
5bc32d174f3dc493312b330d01ceb55e58127f4c
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
DriveBy Activity
Score:
0.90
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 |
|---|---|
| Author: | NDA0N |
| Description: | Detects NSIS installers |
| Rule name: | PE_Digital_Certificate |
|---|---|
| Author: | albertzsigovits |
File information
The table below shows additional information about this malware sample such as delivery method and external references.
Malspam
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_DLL_CHARACTERISTICS | Missing dll Security Characteristics (HIGH_ENTROPY_VA) | high |
Reviews
| ID | Capabilities | Evidence |
|---|---|---|
| COM_BASE_API | Can Download & Execute components | ole32.dll::CoCreateInstance |
| SECURITY_BASE_API | Uses Security Base API | ADVAPI32.dll::AdjustTokenPrivileges ADVAPI32.dll::SetFileSecurityW |
| SHELL_API | Manipulates System Shell | SHELL32.dll::ShellExecuteW SHELL32.dll::SHFileOperationW SHELL32.dll::SHGetFileInfoW |
| WIN32_PROCESS_API | Can Create Process and Threads | KERNEL32.dll::CreateProcessW ADVAPI32.dll::OpenProcessToken KERNEL32.dll::CloseHandle KERNEL32.dll::CreateThread |
| WIN_BASE_API | Uses Win Base API | KERNEL32.dll::LoadLibraryExW KERNEL32.dll::GetDiskFreeSpaceW KERNEL32.dll::GetCommandLineW |
| WIN_BASE_IO_API | Can Create Files | KERNEL32.dll::CopyFileW KERNEL32.dll::CreateDirectoryW KERNEL32.dll::CreateFileW KERNEL32.dll::DeleteFileW KERNEL32.dll::MoveFileW KERNEL32.dll::MoveFileExW |
| WIN_BASE_USER_API | Retrieves Account Information | ADVAPI32.dll::LookupPrivilegeValueW |
| WIN_REG_API | Can Manipulate Windows Registry | ADVAPI32.dll::RegCreateKeyExW ADVAPI32.dll::RegDeleteKeyW ADVAPI32.dll::RegOpenKeyExW ADVAPI32.dll::RegQueryValueExW ADVAPI32.dll::RegSetValueExW |
| WIN_USER_API | Performs GUI Actions | USER32.dll::AppendMenuW USER32.dll::EmptyClipboard USER32.dll::FindWindowExW USER32.dll::OpenClipboard USER32.dll::PeekMessageW USER32.dll::CreateWindowExW |
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