MalwareBazaar Database
You are currently viewing the MalwareBazaar entry for SHA256 5fe761bc21851489d103c7e2d94b8643a67c9fe2b877c5ae3b376f658da495db. 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
XWorm
Vendor detections: 13
| SHA256 hash: | 5fe761bc21851489d103c7e2d94b8643a67c9fe2b877c5ae3b376f658da495db |
|---|---|
| SHA3-384 hash: | 3584756c3a225bc47f0a33b364c5bb46321ffab9e739e1c44b3f6695e56aa7da3c4d0e99e9d0e50ec2f1cda24440ba2e |
| SHA1 hash: | 1c48d0e04cabafd347aadc95440316872679433e |
| MD5 hash: | ec1c9d8eaf5bb9d958e9e781f2df3604 |
| humanhash: | helium-nuts-alaska-idaho |
| File name: | Thermo Fisher RFQTFS-1500808pdf.exe |
| Download: | download sample |
| Signature | XWorm |
| File size: | 1'177'424 bytes |
| First seen: | 2025-07-23 23:10:17 UTC |
| Last seen: | 2025-07-24 18:03:43 UTC |
| File type: |  exe |
| MIME type: | application/x-dosexec |
| imphash | 573bb7b41bc641bd95c0f5eec13c233b (66 x GuLoader, 32 x AgentTesla, 31 x RemcosRAT) |
| ssdeep | 24576:/TAz2XR/Iq/6btkHzIT2t8zM9XeLxw0E6fAVyCNQzaK:Ls2XR/IpRkHNKMkLKDwPj |
| Threatray | 171 similar samples on MalwareBazaar |
| TLSH | T1E245CFE278E8B111D08CCFFD201674B24E67DE2A45D768092349BE2E37BD42E570A5F6 |
| 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 | 827169797979b9b1 (9 x XWorm, 5 x GuLoader) |
| Reporter |  abuse_ch |
| Tags: | exe signed xworm |
Code Signing Certificate
| Organisation: | Ensidige |
|---|---|
| Issuer: | Ensidige |
| Algorithm: | sha256WithRSAEncryption |
| Valid from: | 2024-11-01T06:49:07Z |
| Valid to: | 2026-02-04T06:49:07Z |
| Serial number: | 1b8eb1a4e699c2319c7f99e7809a10427a5df84a |
| Thumbprint Algorithm: | SHA256 |
| Thumbprint: | 6c6b6f64da7cd49d355db28e3d76838c803f7ba74d531967af7cc6ae9ac42e37 |
| Source: | This information was brought to you by ReversingLabs A1000 Malware Analysis Platform |
Indicators Of Compromise (IOCs)
Below is a list of indicators of compromise (IOCs) associated with this malware samples.
| IOC | ThreatFox Reference |
|---|---|
| 37.120.208.40:57625 | https://threatfox.abuse.ch/ioc/1560162/ |
Intelligence
File Origin
# of uploads :
2
# of downloads :
76
Origin country :
NLVendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
Thermo Fisher RFQTFS-1500808pdf.exe
Verdict:
Malicious activity
Analysis date:
2025-07-23 23:12:45 UTC
Tags:
pastebin xworm remote stealer
Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Detection:
Guloader
Verdict:
Clean
Score:
89.1%
Tags:
n/a
Result
Verdict:
Clean
Maliciousness:
Behaviour
Creating a window
Searching for the window
Creating a file in the %AppData% subdirectories
Creating a file in the %temp% subdirectories
Verdict:
Unknown
Threat level:
2.5/10
Confidence:
100%
Tags:
adaptive-context anti-debug blackhole installer microsoft_visual_cc overlay signed
Verdict:
Malicious
Labled as:
Win/malicious_confidence_60%
Verdict:
Suspicious
Result
Threat name:
GuLoader, XWorm
Detection:
malicious
Classification:
troj.spyw.evad
Score:
100 / 100
Signature
AI detected suspicious PE digital signature
C2 URLs / IPs found in malware configuration
Connects to a pastebin service (likely for C&C)
Found malware configuration
Initial sample is a PE file and has a suspicious name
Joe Sandbox ML detected suspicious sample
Malicious sample detected (through community Yara rule)
Multi AV Scanner detection for submitted file
Queries sensitive video device information (via WMI, Win32_VideoController, often done to detect virtual machines)
Sample uses string decryption to hide its real strings
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)
Tries to steal Mail credentials (via file / registry access)
Yara detected GuLoader
Yara detected XWorm
Behaviour
Behavior Graph:
Score:
96%
Verdict:
Malware
File Type:
PE
Verdict:
inconclusive
YARA:
5 match(es)
Tags:
Executable PE (Portable Executable) Win 32 Exe x86
Verdict:
Malicious
Threat:
Trojan.Win32.Guloader
Threat name:
Win32.Trojan.Guloader
Status:
Malicious
First seen:
2025-07-23 23:10:33 UTC
File Type:
PE (Exe)
Extracted files:
14
AV detection:
16 of 24 (66.67%)
Threat level:
5/5
Detection(s):
Suspicious file
Verdict:
malicious
Label(s):
cloudeye
Similar samples:
+ 161 additional samples on MalwareBazaar
Result
Malware family:
xworm
Score:
10/10
Tags:
family:xworm collection discovery rat spyware stealer trojan
Behaviour
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: MapViewOfSection
Suspicious use of AdjustPrivilegeToken
Suspicious use of SetWindowsHookEx
Suspicious use of WriteProcessMemory
outlook_office_path
outlook_win_path
Enumerates physical storage devices
System Location Discovery: System Language Discovery
Drops file in Program Files directory
Drops file in Windows directory
Suspicious use of NtCreateThreadExHideFromDebugger
Suspicious use of NtSetInformationThreadHideFromDebugger
Accesses Microsoft Outlook profiles
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
Detect Xworm Payload
Xworm
Xworm family
Verdict:
Suspicious
Tags:
n/a
YARA:
n/a
Unpacked files
SH256 hash:
5fe761bc21851489d103c7e2d94b8643a67c9fe2b877c5ae3b376f658da495db
MD5 hash:
ec1c9d8eaf5bb9d958e9e781f2df3604
SHA1 hash:
1c48d0e04cabafd347aadc95440316872679433e
SH256 hash:
8b4c47c4cf5e76ec57dd5a050d5acd832a0d532ee875d7b44f6cdaf68f90d37c
MD5 hash:
9b38a1b07a0ebc5c7e59e63346ecc2db
SHA1 hash:
97332a2ffcf12a3e3f27e7c05213b5d7faa13735
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: | Detect_NSIS_Nullsoft_Installer |
|---|---|
| Author: | Obscurity Labs LLC |
| Description: | Detects NSIS installers by .ndata section + NSIS header string |
| Rule name: | PE_Digital_Certificate |
|---|---|
| Author: | albertzsigovits |
| 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.
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 |
| SHELL_API | Manipulates System Shell | SHELL32.dll::ShellExecuteExW 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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