MalwareBazaar Database
You are currently viewing the MalwareBazaar entry for SHA256 c66c439cecc85c1c339f113fdd01c628bbb5342fc6e8e094c4f67144926b9695. 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
QuasarRAT
Vendor detections: 13
| SHA256 hash: | c66c439cecc85c1c339f113fdd01c628bbb5342fc6e8e094c4f67144926b9695 |
|---|---|
| SHA3-384 hash: | 7b5fd8e0fcb7028504564b22d457767c75c335b16f2455b9e691a8b1da9632b35066dec6212899e2521f3decfd50c182 |
| SHA1 hash: | ea438b87a65db738c419a4712afbcc79b9f2c02e |
| MD5 hash: | 21141b0e4f1a9a8dc4d21fa7e51d24d2 |
| humanhash: | bakerloo-pizza-freddie-yellow |
| File name: | c66c439cecc85c1c339f113fdd01c628bbb5342fc6e8e094c4f67144926b9695 |
| Download: | download sample |
| Signature | QuasarRAT |
| File size: | 1'709'056 bytes |
| First seen: | 2025-07-15 10:21:15 UTC |
| Last seen: | Never |
| File type: |  exe |
| MIME type: | application/x-dosexec |
| imphash | 195344e91058dfd7b562048904e11ebf (2 x QuasarRAT) |
| ssdeep | 49152:Ho8yS+UUXD2Md2UKn+iWowG/7miLhOKyg/:IO+USLKn+iWiFOK7/ |
| Threatray | 328 similar samples on MalwareBazaar |
| TLSH | T15385335CC19399EAF7C052776093E9F45A819D33C0246969E238B7E52B09CDC7E2F289 |
| TrID | 41.1% (.EXE) Microsoft Visual C++ compiled executable (generic) (16529/12/5) 26.1% (.EXE) Win64 Executable (generic) (10522/11/4) 12.5% (.EXE) Win16 NE executable (generic) (5038/12/1) 5.1% (.ICL) Windows Icons Library (generic) (2059/9) 5.0% (.EXE) OS/2 Executable (generic) (2029/13) |
| Magika | pebin |
| Reporter |  JAMESWT_WT |
| Tags: | 104-207-148-168 exe QuasarRAT |
Intelligence
File Origin
# of uploads :
1
# of downloads :
31
Origin country :
ITVendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
c66c439cecc85c1c339f113fdd01c628bbb5342fc6e8e094c4f67144926b9695
Verdict:
Malicious activity
Analysis date:
2025-07-15 10:23:50 UTC
Tags:
auto-reg
Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Detection:
n/a
Verdict:
Malicious
Score:
96.5%
Tags:
virus
Result
Verdict:
Suspicious
Maliciousness:
Behaviour
Enabling autorun with the standard Software\Microsoft\Windows\CurrentVersion\Run registry branch
Verdict:
Malicious
Threat level:
10/10
Confidence:
100%
Tags:
anti-debug explorer lolbin mingw packed
Verdict:
Malicious
Labled as:
Trojan.Generic
Verdict:
Suspicious
Score:
96%
Verdict:
Malware
File Type:
PE
Verdict:
inconclusive
YARA:
4 match(es)
Tags:
Executable PE (Portable Executable) Win 64 Exe x64
Threat name:
Win64.Backdoor.Quasar
Status:
Malicious
First seen:
2025-06-03 04:41:00 UTC
AV detection:
27 of 38 (71.05%)
Threat level:
5/5
Detection(s):
Suspicious file
Verdict:
malicious
Label(s):
donut_injector
quasarrat
Similar samples:
+ 318 additional samples on MalwareBazaar
Result
Malware family:
quasar
Score:
10/10
Tags:
family:donutloader family:quasar botnet:office04 adware loader persistence ransomware spyware trojan
Behaviour
Checks SCSI registry key(s)
Enumerates system info in registry
Modifies Internet Explorer settings
Modifies registry class
Suspicious behavior: AddClipboardFormatListener
Suspicious behavior: EnumeratesProcesses
Suspicious use of AdjustPrivilegeToken
Suspicious use of FindShellTrayWindow
Suspicious use of SendNotifyMessage
Suspicious use of SetWindowsHookEx
Suspicious use of WriteProcessMemory
Uses Task Scheduler COM API
Uses Volume Shadow Copy WMI provider
Uses Volume Shadow Copy service COM API
Adds Run key to start application
Enumerates connected drives
Boot or Logon Autostart Execution: Active Setup
Detects DonutLoader
DonutLoader
Donutloader family
Quasar RAT
Quasar family
Quasar payload
Malware Config
C2 Extraction:
104.207.148.168:4646
Verdict:
Malicious
Tags:
n/a
YARA:
n/a
Unpacked files
SH256 hash:
c66c439cecc85c1c339f113fdd01c628bbb5342fc6e8e094c4f67144926b9695
MD5 hash:
21141b0e4f1a9a8dc4d21fa7e51d24d2
SHA1 hash:
ea438b87a65db738c419a4712afbcc79b9f2c02e
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: | golang_bin_JCorn_CSC846 |
|---|---|
| Author: | Justin Cornwell |
| Description: | CSC-846 Golang detection ruleset |
| Rule name: | pe_detect_tls_callbacks |
|---|
| 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_AUTHENTICODE | Missing Authenticode | high |
| CHECK_DLL_CHARACTERISTICS | Missing dll Security Characteristics (GUARD_CF) | high |
Reviews
| ID | Capabilities | Evidence |
|---|---|---|
| WIN32_PROCESS_API | Can Create Process and Threads | KERNEL32.dll::OpenProcess KERNEL32.dll::WriteProcessMemory KERNEL32.dll::CloseHandle |
| WIN_BASE_API | Uses Win Base API | KERNEL32.dll::LoadLibraryA KERNEL32.dll::GetStartupInfoA |
| WIN_REG_API | Can Manipulate Windows Registry | ADVAPI32.dll::RegOpenKeyExA ADVAPI32.dll::RegSetValueExA |
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