MalwareBazaar Database
You are currently viewing the MalwareBazaar entry for SHA256 bc3f66f7dbab0b0e60bb989d1e53f8afd00a9b88b370c12c364cf450eb61856e. 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
| SHA256 hash: | bc3f66f7dbab0b0e60bb989d1e53f8afd00a9b88b370c12c364cf450eb61856e |
|---|---|
| SHA3-384 hash: | 5af774e80dcf1ac94fcc623ee19716535cdd1824744a42ec72b620f60f1544d7af95d45787e2b1262bfda3042d049f8b |
| SHA1 hash: | 67a7ba517b2061a750167d25489763eb9e1a6a5b |
| MD5 hash: | 51493da79f7be2add42abc448ce8ffd1 |
| humanhash: | island-shade-uniform-salami |
| File name: | Quote-SA70451153766809567875351061-24_pdf.exe |
| Download: | download sample |
| Signature | GuLoader |
| File size: | 829'406 bytes |
| First seen: | 2025-02-27 07:58:10 UTC |
| Last seen: | 2025-02-27 08:32:49 UTC |
| File type: |  exe |
| MIME type: | application/x-dosexec |
| imphash | e221f4f7d36469d53810a4b5f9fc8966 (118 x GuLoader, 28 x RemcosRAT, 21 x Formbook) |
| ssdeep | 24576:fXrqImBCUkwIzhricrHhn20apvnLKUoFx7tzD0:fWISmhh+vLKhx7tH0 |
| Threatray | 71 similar samples on MalwareBazaar |
| TLSH | T1D405E026E57A063BD4BB6779AADF800473761D3137F7013733B4FA29A531312A8ADA41 |
| 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 |
| dhash icon | 5d9c6ce4d4929005 (19 x GuLoader) |
| Reporter |  lowmal3 |
| Tags: | exe GuLoader |
Intelligence
File Origin
# of uploads :
2
# of downloads :
472
Origin country :
DEVendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
Quote-SA70451153766809567875351061-24_pdf.exe
Verdict:
Malicious activity
Analysis date:
2025-02-27 07:59:45 UTC
Tags:
evasion stealer
Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Detection(s):
Verdict:
Clean
Score:
89.3%
Tags:
n/a
Result
Verdict:
Clean
Maliciousness:
Behaviour
Creating a file in the %temp% directory
Creating a file in the %AppData% subdirectories
Creating a file
Delayed reading of the file
Verdict:
Suspicious
Threat level:
5/10
Confidence:
100%
Tags:
adaptive-context blackhole installer masquerade microsoft_visual_cc obfuscated overlay packed packer_detected
Verdict:
Malicious
Labled as:
Doina.Generic
Verdict:
Suspicious
Result
Threat name:
GuLoader
Detection:
malicious
Classification:
troj.spyw.evad
Score:
96 / 100
Signature
Initial sample is a PE file and has a suspicious name
Joe Sandbox ML detected suspicious sample
Multi AV Scanner detection for submitted file
Queries sensitive service information (via WMI, Win32_LogicalDisk, often done to detect sandboxes)
Suricata IDS alerts for network traffic
Switches to a custom stack to bypass stack traces
Tries to detect virtualization through RDTSC time measurements
Tries to harvest and steal browser information (history, passwords, etc)
Uses the Telegram API (likely for C&C communication)
Writes or reads registry keys via WMI
Yara detected GuLoader
Behaviour
Behavior Graph:
Score:
98%
Verdict:
Malware
File Type:
PE
Threat name:
Win32.Trojan.Guloader
Status:
Malicious
First seen:
2025-02-27 07:59:10 UTC
File Type:
PE (Exe)
Extracted files:
18
AV detection:
20 of 24 (83.33%)
Threat level:
5/5
Detection(s):
Suspicious file
Verdict:
malicious
Label(s):
cloudeye
Similar samples:
+ 61 additional samples on MalwareBazaar
Result
Malware family:
guloader
Score:
10/10
Tags:
family:darkcloud family:guloader discovery downloader spyware stealer
Behaviour
Suspicious behavior: MapViewOfSection
Suspicious use of SetWindowsHookEx
Suspicious use of WriteProcessMemory
Enumerates physical storage devices
Program crash
System Location Discovery: System Language Discovery
Drops file in Windows directory
Suspicious use of NtCreateThreadExHideFromDebugger
Suspicious use of NtSetInformationThreadHideFromDebugger
Legitimate hosting services abused for malware hosting/C2
Loads dropped DLL
Reads user/profile data of local email clients
Reads user/profile data of web browsers
DarkCloud
Darkcloud family
Guloader family
Guloader,Cloudeye
Verdict:
Malicious
Tags:
n/a
YARA:
n/a
Unpacked files
SH256 hash:
bc3f66f7dbab0b0e60bb989d1e53f8afd00a9b88b370c12c364cf450eb61856e
MD5 hash:
51493da79f7be2add42abc448ce8ffd1
SHA1 hash:
67a7ba517b2061a750167d25489763eb9e1a6a5b
SH256 hash:
4ff9b2678d698677c5d9732678f9cf53f17290e09d053691aac4cc6e6f595cbe
MD5 hash:
3e6bf00b3ac976122f982ae2aadb1c51
SHA1 hash:
caab188f7fdc84d3fdcb2922edeeb5ed576bd31d
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Malicious File
Score:
1.00
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 |
| 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 KERNEL32.dll::CloseHandle KERNEL32.dll::CreateThread |
| WIN_BASE_API | Uses Win Base API | KERNEL32.dll::LoadLibraryW KERNEL32.dll::LoadLibraryA 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::GetWindowsDirectoryW |
| 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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