MalwareBazaar Database
You are currently viewing the MalwareBazaar entry for SHA256 4a6389fb42a4918ca6b7aec6c86a4e945f85dfb6490f873f9be24fa5c7f9df06. 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: 15
| SHA256 hash: | 4a6389fb42a4918ca6b7aec6c86a4e945f85dfb6490f873f9be24fa5c7f9df06 |
|---|---|
| SHA3-384 hash: | 027350947a369d4dec42540fbd158f377f7bf141853b7f4b309e933759fde0ec492026ad16b986fe949b4dfd99c34aff |
| SHA1 hash: | de5d591e4013f4fa6115a30e3c71d83b74c10bf9 |
| MD5 hash: | af8da7f9142ae9bdee1fa3be93f0c8c1 |
| humanhash: | nuts-alabama-fourteen-lactose |
| File name: | af8da7f9142ae9bdee1fa3be93f0c8c1.exe |
| Download: | download sample |
| Signature | QuasarRAT |
| File size: | 5'141'504 bytes |
| First seen: | 2025-04-15 09:14:34 UTC |
| Last seen: | Never |
| File type: |  exe |
| MIME type: | application/x-dosexec |
| imphash | f34d5f2d4577ed6d9ceec516c1f5a744 (48'748 x AgentTesla, 19'642 x Formbook, 12'245 x SnakeKeylogger) |
| ssdeep | 98304:YZsZCI+d6uKuHAoNn+yv97pBC7d0xjkZZdxp0/LiELlIX4onQOsQKXZri5bfLYzR:YZhIF9loNnV97a7dykZalIXWOvUcbfY |
| Threatray | 5 similar samples on MalwareBazaar |
| TLSH | T13F36123A1FFB540BEB44C478CEEDD27E2C6680955C7EEDA139198985BD3BAC844902C7 |
| TrID | 67.7% (.EXE) Generic CIL Executable (.NET, Mono, etc.) (73123/4/13) 9.7% (.EXE) Win64 Executable (generic) (10522/11/4) 6.0% (.DLL) Win32 Dynamic Link Library (generic) (6578/25/2) 4.6% (.EXE) Win16 NE executable (generic) (5038/12/1) 4.1% (.EXE) Win32 Executable (generic) (4504/4/1) |
| Magika | pebin |
| dhash icon | 337979617193699f (1 x QuasarRAT) |
| Reporter |  abuse_ch |
| Tags: | exe QuasarRAT |
Intelligence
File Origin
# of uploads :
1
# of downloads :
495
Origin country :
NLVendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
FrustrateHookLoader.exe
Verdict:
Malicious activity
Analysis date:
2025-04-11 10:23:43 UTC
Tags:
n/a
Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Detection:
n/a
Detection(s):
Verdict:
Malicious
Score:
90.2%
Tags:
shell sage remo
Result
Verdict:
Malware
Maliciousness:
Behaviour
Creating a file in the %temp% directory
Creating a process from a recently created file
Creating a file
Launching a process
Creating a process with a hidden window
Searching for the window
Creating a window
Searching for synchronization primitives
Сreating synchronization primitives
DNS request
Connection attempt
Sending a custom TCP request
Using the Windows Management Instrumentation requests
Connection attempt to an infection source
Sending a TCP request to an infection source
Unauthorized injection to a system process
Verdict:
Likely Malicious
Threat level:
7.5/10
Confidence:
100%
Tags:
net_reactor obfuscated obfuscated packed packed packer_detected
Verdict:
Malicious
Labled as:
Trojan.Generic
Verdict:
Malicious
Result
Threat name:
PureLog Stealer, Quasar
Detection:
malicious
Classification:
troj.expl.evad
Score:
100 / 100
Signature
.NET source code contains method to dynamically call methods (often used by packers)
.NET source code contains potential unpacker
.NET source code references suspicious native API functions
Bypasses PowerShell execution policy
Creates a thread in another existing process (thread injection)
Hides that the sample has been downloaded from the Internet (zone.identifier)
Injects code into the Windows Explorer (explorer.exe)
Joe Sandbox ML detected suspicious sample
Malicious sample detected (through community Yara rule)
Multi AV Scanner detection for submitted file
Queries sensitive service information (via WMI, MSSMBios_RawSMBiosTables, often done to detect sandboxes)
Queries temperature or sensor information (via WMI often done to detect virtual machines)
Sigma detected: Dot net compiler compiles file from suspicious location
Sigma detected: Script Interpreter Execution From Suspicious Folder
Sigma detected: Suspicious Script Execution From Temp Folder
Suspicious powershell command line found
System process connects to network (likely due to code injection or exploit)
Writes to foreign memory regions
Yara detected PureLog Stealer
Yara detected Quasar RAT
Behaviour
Behavior Graph:
Score:
88%
Verdict:
Malware
File Type:
PE
Threat name:
Win32.Trojan.Nekark
Status:
Malicious
First seen:
2025-04-11 10:23:44 UTC
File Type:
PE (.Net Exe)
Extracted files:
19
AV detection:
26 of 38 (68.42%)
Threat level:
5/5
Detection(s):
Suspicious file
Verdict:
malicious
Label(s):
donut_injector
quasarrat
Result
Malware family:
quasar
Score:
10/10
Tags:
family:quasar botnet:ۇ\�� discovery execution spyware trojan
Behaviour
Suspicious behavior: AddClipboardFormatListener
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: GetForegroundWindowSpam
Suspicious use of AdjustPrivilegeToken
Suspicious use of SetWindowsHookEx
Suspicious use of WriteProcessMemory
System Location Discovery: System Language Discovery
.NET Reactor proctector
Command and Scripting Interpreter: PowerShell
Quasar RAT
Quasar family
Quasar payload
Malware Config
C2 Extraction:
�� ��3�wa<�����۪�*)���Y�Ð�
Verdict:
Malicious
Tags:
n/a
YARA:
n/a
Unpacked files
SH256 hash:
4a6389fb42a4918ca6b7aec6c86a4e945f85dfb6490f873f9be24fa5c7f9df06
MD5 hash:
af8da7f9142ae9bdee1fa3be93f0c8c1
SHA1 hash:
de5d591e4013f4fa6115a30e3c71d83b74c10bf9
SH256 hash:
19e2157916b6b168355e9be45ab0e88f1e54fe1c8f8731a01559dc6f0fe1ced3
MD5 hash:
32230e9715449f4e16e08a9989085167
SHA1 hash:
dda33c6e0cbcdf13a33bdd41e122e866d24f177b
Detections:
SUSP_OBF_NET_Reactor_Indicators_Jan24
INDICATOR_EXE_Packed_DotNetReactor
SH256 hash:
2079f4bc640c9ab89fbec2eaaff4f7ed7a68f270417fcfca39603590d1e7530b
MD5 hash:
dd629aaba60d7bf5ce062c8dd59f3735
SHA1 hash:
3f6eaa4a328f43a49579fa123cdab7339143621d
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: | DotNet_Reactor |
|---|---|
| Author: | @bartblaze |
| Description: | Identifies .NET Reactor, which offers .NET code protection such as obfuscation, encryption and so on. |
| Rule name: | INDICATOR_EXE_Packed_DotNetReactor |
|---|---|
| Author: | ditekSHen |
| Description: | Detects executables packed with unregistered version of .NET Reactor |
| Rule name: | MD5_Constants |
|---|---|
| Author: | phoul (@phoul) |
| Description: | Look for MD5 constants |
| Rule name: | NET |
|---|---|
| Author: | malware-lu |
| Rule name: | pe_imphash |
|---|
| Rule name: | PureCrypter |
|---|---|
| Author: | @bartblaze |
| Description: | Identifies PureCrypter, .NET loader and obfuscator. |
| Reference: | https://malpedia.caad.fkie.fraunhofer.de/details/win.purecrypter |
| Rule name: | Skystars_Malware_Imphash |
|---|---|
| Author: | Skystars LightDefender |
| Description: | imphash |
| 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 |
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