MalwareBazaar Database
You are currently viewing the MalwareBazaar entry for SHA256 66839e43d332c54e7fde61b85982da852777c597c0427e2a6e36e46e22b8a13b. 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
Threat unknown
Vendor detections: 12
| SHA256 hash: | 66839e43d332c54e7fde61b85982da852777c597c0427e2a6e36e46e22b8a13b |
|---|---|
| SHA3-384 hash: | b6c0258c6d59f3eeeea3f32a57b7fdb56806d21a72a1d7b9ba1cf116c6ca8a22f78cd9157c76290eba672749daaf1ccc |
| SHA1 hash: | 21399fd655295f76c16bddc86f14732196046093 |
| MD5 hash: | 948540e9ad77a298a843d832d9528914 |
| humanhash: | gee-yankee-steak-spring |
| File name: | svchost.exe |
| Download: | download sample |
| File size: | 1'132'954 bytes |
| First seen: | 2025-11-23 10:27:18 UTC |
| Last seen: | Never |
| File type: |  exe |
| MIME type: | application/x-dosexec |
| imphash | 9dffaeb4de0f0899dcc332737abce907 (1 x Simda) |
| ssdeep | 24576:q6Zv27hBVnFys7wuVWVT0PAW0duYW3YZzHdbCwuWTuNpLO:qE27hQs7tWVToP0Hekxbl5TuLO |
| TLSH | T10235236333C259E1DC49D172028763A9AE73BA7C17B1D42BF7ECCA0F1C70910B6695A6 |
| TrID | 30.2% (.EXE) Win64 Executable (generic) (10522/11/4) 18.9% (.DLL) Win32 Dynamic Link Library (generic) (6578/25/2) 14.4% (.EXE) Win16 NE executable (generic) (5038/12/1) 12.9% (.EXE) Win32 Executable (generic) (4504/4/1) 5.9% (.ICL) Windows Icons Library (generic) (2059/9) |
| Magika | pebin |
| Reporter |  abuse_ch |
| Tags: | exe upx-dec |
abuse_ch
UPX decompressed file, sourced from SHA256 e401075a5d51eee9a461f9b7f8e837c0d7d2c6d7d11381c5f0a53ddccc1022c3UPX unpacked
This file is the unpacked version of a file that has been packed with UPX. Below is furhter information about the parent (compressed) file.
| File size (compressed) : | 1'081'754 bytes |
|---|---|
| File size (de-compressed) : | 1'132'954 bytes |
| Format: | win32/pe |
| Packed file: | e401075a5d51eee9a461f9b7f8e837c0d7d2c6d7d11381c5f0a53ddccc1022c3 |
Intelligence
File Origin
# of uploads :
1
# of downloads :
82
Origin country :
NLVendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
_66839e43d332c54e7fde61b85982da852777c597c0427e2a6e36e46e22b8a13b.exe
Verdict:
Suspicious activity
Analysis date:
2025-11-23 11:12:39 UTC
Tags:
auto-reg
Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Detection:
n/a
Detection(s):
Gathering data
Result
Verdict:
Malware
Maliciousness:
Behaviour
Сreating synchronization primitives
Creating a file in the Windows subdirectories
Creating a file in the Windows directory
Creating a process from a recently created file
Creating a process with a hidden window
Creating a window
Launching a process
Enabling autorun with the standard Software\Microsoft\Windows\CurrentVersion\Run registry branch
Enabling autorun with the shell\open\command registry branches
Enabling autorun
Verdict:
Malicious
Threat level:
10/10
Confidence:
100%
Tags:
adaptive-context evasive fingerprint overlay overlay packed
Verdict:
Malicious
Labled as:
Trojan.Generic
Result
Gathering data
Result
Threat name:
n/a
Detection:
malicious
Classification:
evad
Score:
96 / 100
Signature
Antivirus / Scanner detection for submitted sample
Antivirus detection for dropped file
Creates an autostart registry key pointing to binary in C:\Windows
Creates an undocumented autostart registry key
Drops executables to the windows directory (C:\Windows) and starts them
Drops PE files with benign system names
Multi AV Scanner detection for submitted file
PE file has a writeable .text section
Sigma detected: Files With System Process Name In Unsuspected Locations
Sigma detected: Suspect Svchost Activity
Sigma detected: System File Execution Location Anomaly
Behaviour
Behavior Graph:
Score:
99%
Verdict:
Malware
File Type:
PE
Verdict:
inconclusive
YARA:
4 match(es)
Tags:
Executable PE (Portable Executable) PE File Layout Win 32 Exe x86
Verdict:
Malicious
Threat:
Backdoor.Win32.Udr
Threat name:
Win32.Trojan.Malex
Status:
Malicious
First seen:
2025-11-23 10:41:04 UTC
File Type:
PE (Exe)
AV detection:
33 of 36 (91.67%)
Threat level:
5/5
Detection(s):
Suspicious file
Result
Malware family:
n/a
Score:
8/10
Tags:
discovery persistence
Behaviour
Modifies registry class
Suspicious behavior: EnumeratesProcesses
Suspicious use of WriteProcessMemory
System Location Discovery: System Language Discovery
Drops file in Windows directory
Drops file in System32 directory
Adds Run key to start application
Executes dropped EXE
Modifies system executable filetype association
Boot or Logon Autostart Execution: Active Setup
Verdict:
Malicious
Tags:
Win.Trojan.Ulise-10005646-0
YARA:
n/a
Unpacked files
SH256 hash:
66839e43d332c54e7fde61b85982da852777c597c0427e2a6e36e46e22b8a13b
MD5 hash:
948540e9ad77a298a843d832d9528914
SHA1 hash:
21399fd655295f76c16bddc86f14732196046093
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Malicious File
Score:
1.00
File information
The table below shows additional information about this malware sample such as delivery method and external references.
exe 66839e43d332c54e7fde61b85982da852777c597c0427e2a6e36e46e22b8a13b
(this sample)
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