MalwareBazaar Database
You are currently viewing the MalwareBazaar entry for SHA256 37d13708f889db7729c8fd162898aa6667f546de9396aaa604fb97998fbaf02a. 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: | 37d13708f889db7729c8fd162898aa6667f546de9396aaa604fb97998fbaf02a |
|---|---|
| SHA3-384 hash: | 35c3c59e4993ca7bcb1f8cc863a3ee4d6063adefaf497d5ba552c0b87e91fd29e180b5e048c14ad2fab14b58cc868d88 |
| SHA1 hash: | afebefe8ebbe569e7efef14ae1e617418fa5b0ec |
| MD5 hash: | 3d4fd2bc7b91d6724a1b46c27a2e35b7 |
| humanhash: | alpha-lamp-alaska-california |
| File name: | rRequestforQuotation_0_2025_pdf.exe |
| Download: | download sample |
| Signature | GuLoader |
| File size: | 900'684 bytes |
| First seen: | 2025-02-03 09:00:07 UTC |
| Last seen: | Never |
| File type: |  exe |
| MIME type: | application/x-dosexec |
| imphash | e2a592076b17ef8bfb48b7e03965a3fc (388 x GuLoader, 59 x RemcosRAT, 44 x VIPKeylogger) |
| ssdeep | 24576:QPyqE0GP4TilxAECVQntGvuCvmuReqr/sblNP9ExQ:IE0A2MGwWp/sblNVE2 |
| Threatray | 406 similar samples on MalwareBazaar |
| TLSH | T1E815E1132608553AC69A1633E0A7DF3783777E9958648E47B2FD7C873DA130B30A539A |
| 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): |  |
| dhash icon | f0c48c9e86c4e4e0 (4 x GuLoader) |
| Reporter |  FXOLabs |
| Tags: | exe GuLoader |
Intelligence
File Origin
# of uploads :
1
# of downloads :
586
Origin country :
BRVendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
rRequestforQuotation_0_2025_pdf.exe
Verdict:
Malicious activity
Analysis date:
2025-02-03 09:14:45 UTC
Tags:
evasion snake keylogger stealer
Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Verdict:
Malicious
Score:
95.7%
Tags:
underscore injection obfusc virus
Result
Verdict:
Clean
Maliciousness:
Behaviour
Searching for the window
Creating a window
Creating a file in the %temp% subdirectories
Creating a file
Delayed reading of the file
Restart of the analyzed sample
Verdict:
Likely Malicious
Threat level:
7.5/10
Confidence:
100%
Tags:
installer masquerade microsoft_visual_cc overlay packed packer_detected
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.
Malware family:
NSIS
Verdict:
Unknown
Result
Threat name:
GuLoader
Detection:
malicious
Classification:
troj.spyw.evad
Score:
96 / 100
Signature
Disable Task Manager(disabletaskmgr)
Disables CMD prompt
Disables the Windows task manager (taskmgr)
Initial sample is a PE file and has a suspicious name
Joe Sandbox ML detected suspicious sample
Multi AV Scanner detection for submitted file
Switches to a custom stack to bypass stack traces
Tries to detect the country of the analysis system (by using the IP)
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:
Score:
99%
Verdict:
Malware
File Type:
PE
Detection(s):
Suspicious file
Verdict:
malicious
Label(s):
cloudeye
Similar samples:
+ 396 additional samples on MalwareBazaar
Result
Malware family:
guloader
Score:
10/10
Tags:
family:guloader collection defense_evasion discovery downloader evasion spyware stealer trojan
Behaviour
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: MapViewOfSection
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
outlook_office_path
outlook_win_path
Enumerates physical storage devices
System Location Discovery: System Language Discovery
Suspicious use of NtCreateThreadExHideFromDebugger
Suspicious use of NtSetInformationThreadHideFromDebugger
Accesses Microsoft Outlook profiles
Legitimate hosting services abused for malware hosting/C2
Looks up external IP address via web service
Loads dropped DLL
Reads user/profile data of local email clients
Reads user/profile data of web browsers
Disables Task Manager via registry modification
Guloader family
Guloader,Cloudeye
Modifies Windows Defender DisableAntiSpyware settings
Verdict:
Informative
Tags:
n/a
YARA:
n/a
Unpacked files
SH256 hash:
37d13708f889db7729c8fd162898aa6667f546de9396aaa604fb97998fbaf02a
MD5 hash:
3d4fd2bc7b91d6724a1b46c27a2e35b7
SHA1 hash:
afebefe8ebbe569e7efef14ae1e617418fa5b0ec
SH256 hash:
2e226715419a5882e2e14278940ee8ef0aa648a3ef7af5b3dc252674111962bc
MD5 hash:
a4dd044bcd94e9b3370ccf095b31f896
SHA1 hash:
17c78201323ab2095bc53184aa8267c9187d5173
Malware family:
GuLoader
Verdict:
Malicious
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Malicious File
Score:
0.99
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: | Sus_Obf_Enc_Spoof_Hide_PE |
|---|---|
| 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.
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_AUTHENTICODE | Missing Authenticode | high |
| 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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