MalwareBazaar Database
You are currently viewing the MalwareBazaar entry for SHA256 8f88a31d389b61548519017e9368119657beafbbc357dcc090d9a8bc8f95bc32. 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: 18
| SHA256 hash: | 8f88a31d389b61548519017e9368119657beafbbc357dcc090d9a8bc8f95bc32 |
|---|---|
| SHA3-384 hash: | 0ce0f99e7e2390c86c0886be25a82b3c96df37b829035fa0dc955ae1440214780d13cf0a2847cacec84023f719da0bd2 |
| SHA1 hash: | 5cc8d9da8965e1e958e3cb618e85628c756e192d |
| MD5 hash: | 45f9654de3f416edabefad32d9c5d0d2 |
| humanhash: | dakota-november-lake-sixteen |
| File name: | TT Copy.exe |
| Download: | download sample |
| Signature | GuLoader |
| File size: | 1'574'832 bytes |
| First seen: | 2026-03-15 22:05:01 UTC |
| Last seen: | Never |
| File type: |  exe |
| MIME type: | application/x-dosexec |
| imphash | 1f23f452093b5c1ff091a2f9fb4fa3e9 (305 x GuLoader, 47 x AgentTesla, 47 x RemcosRAT) |
| ssdeep | 24576:+OG2C8FE6F08kntuBAVY2mc4hD5ZsNmVzXazR9SExecT40zcJi4XCz/:5JrvktuBG7GZsUVzolx/49J7XCT |
| Threatray | 2'601 similar samples on MalwareBazaar |
| TLSH | T1B87523C53AB0D867D1760E701417D7B91B6EBE132D33F646E6E06E8B386E2C0E5B8241 |
| TrID | 50.3% (.EXE) Win32 Executable MS Visual C++ (generic) (31206/45/13) 10.6% (.DLL) Win32 Dynamic Link Library (generic) (6578/25/2) 10.5% (.EXE) Win64 Executable (generic) (6522/11/2) 8.1% (.EXE) Win16 NE executable (generic) (5038/12/1) 7.2% (.EXE) Win32 Executable (generic) (4504/4/1) |
| Magika | pebin |
| dhash icon | 7cdcce5ed9e1f5dd (3 x GuLoader, 1 x RemcosRAT) |
| Reporter |  threatcat_ch |
| Tags: | exe GuLoader |
Intelligence
File Origin
# of uploads :
1
# of downloads :
229
Origin country :
CHVendor Threat Intelligence
Malware configuration found for:
GuLoader
NSIS
Details
GuLoader
a c2 URL, a useragent string, and a string XOR key
GuLoader
an XOR decryption key and an extracted component
NSIS
extracted archive contents
Malware family:
remcos
ID:
1
File name:
_8f88a31d389b61548519017e9368119657beafbbc357dcc090d9a8bc8f95bc32.exe
Verdict:
Malicious activity
Analysis date:
2026-03-15 22:05:46 UTC
Tags:
remcos rat auto-reg
Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Detection:
Guloader
Verdict:
Malicious
Score:
90.2%
Tags:
injection virus blic
Result
Verdict:
Malware
Maliciousness:
Behaviour
Creating a file in the %temp% directory
Creating a window
Creating a file
Searching for the window
Creating a file in the %AppData% subdirectories
Creating a file in the Program Files subdirectories
Delayed reading of the file
Unauthorized injection to a recently created process
Restart of the analyzed sample
Verdict:
Suspicious
Threat level:
5/10
Confidence:
100%
Tags:
adaptive-context anti-debug fingerprint installer installer installer-heuristic microsoft_visual_cc nsis soft-404
Verdict:
Malicious
Labled as:
Malware_54.6
Verdict:
Malicious
File Type:
exe x32
Detections:
Trojan.NSIS.Makoob.sbe Trojan.NSIS.Makoob.sba Trojan-Downloader.Win32.Minix.sb Trojan.Win32.Guloader.sb Trojan.Win32.Agent.sb HEUR:Trojan.Win32.Guloader.gen Backdoor.Win32.Remcos.sb
Verdict:
Suspicious
Result
Threat name:
Remcos, GuLoader
Detection:
malicious
Classification:
phis.troj.spyw.evad
Score:
100 / 100
Signature
Antivirus detection for dropped file
C2 URLs / IPs found in malware configuration
Creates autostart registry keys with suspicious names
Detected Remcos RAT
Found hidden mapped module (file has been removed from disk)
Found malware configuration
Maps a DLL or memory area into another process
Multi AV Scanner detection for dropped file
Multi AV Scanner detection for submitted file
Sigma detected: Remcos
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 Instant Messenger accounts or passwords
Tries to steal Mail credentials (via file / registry access)
Unusual module load detection (module proxying)
Writes to foreign memory regions
Yara detected GuLoader
Yara detected Remcos RAT
Behaviour
Behavior Graph:
Score:
73%
Verdict:
Malware
File Type:
PE
Verdict:
inconclusive
YARA:
5 match(es)
Tags:
Executable NSIS Installer PE (Portable Executable) PE File Layout Win 32 Exe x86
Verdict:
Malicious
Threat:
Family.REMCOS
Detection(s):
Suspicious file
Verdict:
malicious
Label(s):
cloudeye
Similar samples:
+ 2'591 additional samples on MalwareBazaar
Result
Malware family:
remcos
Score:
10/10
Tags:
family:remcos botnet:remotehost collection discovery persistence rat
Behaviour
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: MapViewOfSection
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
Enumerates physical storage devices
Program crash
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
Suspicious use of SetThreadContext
Accesses Microsoft Outlook accounts
Adds Run key to start application
Contacts third-party web service commonly abused for C2
Checks computer location settings
Executes dropped EXE
Loads dropped DLL
Detected Nirsoft tools
Remcos
Remcos family
Malware Config
C2 Extraction:
130.12.181.39:2404
Unpacked files
SH256 hash:
8f88a31d389b61548519017e9368119657beafbbc357dcc090d9a8bc8f95bc32
MD5 hash:
45f9654de3f416edabefad32d9c5d0d2
SHA1 hash:
5cc8d9da8965e1e958e3cb618e85628c756e192d
SH256 hash:
86c8ee210e6611383a634dcb8c60455063ddae3d7adccbeacf3adf7bf2a46676
MD5 hash:
d2e45dd852a659e11897df573832f381
SHA1 hash:
19990ee627c95b6c18d3b5c5f0ec5c24791d0af5
SH256 hash:
c2f405d7402f815d0c3fadd9a50f0bbbb1bab9aa38fe347823478a2587299448
MD5 hash:
9625d5b1754bc4ff29281d415d27a0fd
SHA1 hash:
80e85afc5cccd4c0a3775edbb90595a1a59f5ce0
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:
0.79
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: | VECT_Ransomware |
|---|---|
| Author: | Mustafa Bakhit |
| Description: | Detects activity associated with VECT ransomware. This includes registry modifications and deletions, execution of system and defense-evasion commands, suspicious API usage, mutex creation, file and memory manipulation, ransomware note generation, anti-debugging and anti-analysis techniques, and embedded cryptographic constants (SHA256) characteristic of this malware family. Designed for threat intelligence and malware detection environments. |
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
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