MalwareBazaar Database
You are currently viewing the MalwareBazaar entry for SHA256 1c021645e4b0340f968f6909823b642e01b577fdb878b76368d55e7895c3e96e. 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: 19
| SHA256 hash: | 1c021645e4b0340f968f6909823b642e01b577fdb878b76368d55e7895c3e96e |
|---|---|
| SHA3-384 hash: | ba3b72548f809e9b9c654851f7fc923dbb024aa163fdb1a6ede646f0af51ec774084c74763f8e2cb8ef2ebcdd2416b7b |
| SHA1 hash: | 3f2cb7db69441f95097d9e422ddf217f9e975666 |
| MD5 hash: | 827089f7d928c6dcb73bb33d0ff0affb |
| humanhash: | carpet-mike-colorado-florida |
| File name: | WindowsUpdate.exe |
| Download: | download sample |
| Signature | QuasarRAT |
| File size: | 2'711'552 bytes |
| First seen: | 2026-03-16 14:23:25 UTC |
| Last seen: | Never |
| File type: |  exe |
| MIME type: | application/x-dosexec |
| imphash | f34d5f2d4577ed6d9ceec516c1f5a744 (48'842 x AgentTesla, 19'774 x Formbook, 12'296 x SnakeKeylogger) |
| ssdeep | 49152:6oDVWiNgLmnc/N+ZZXZQOLHM7wRPirm2NnPTKKm77LrwCB6uan:xDVlNgScVIxpL7oZNn2Km77LrwkFW |
| Threatray | 603 similar samples on MalwareBazaar |
| TLSH | T112C5011177F9810AE3BF2BB9ABB2145D0BB7B503DA3AD38E1848509D0EA3750DE51763 |
| TrID | 59.5% (.RLL) Microsoft Resource Library (x86) (177572/6/26) 24.5% (.EXE) Generic CIL Executable (.NET, Mono, etc.) (73123/4/13) 5.5% (.EXE) Microsoft Visual C++ compiled executable (generic) (16529/12/5) 2.2% (.DLL) Win32 Dynamic Link Library (generic) (6578/25/2) 2.1% (.EXE) Win64 Executable (generic) (6522/11/2) |
| Magika | pebin |
| Reporter |  burger |
| Tags: | exe QuasarRAT |
Intelligence
File Origin
# of uploads :
1
# of downloads :
195
Origin country :
NLVendor Threat Intelligence
Malware configuration found for:
QuasarRAT
Details
Malware family:
n/a
ID:
1
File name:
WindowsUpdate.exe
Verdict:
Malicious activity
Analysis date:
2026-03-16 14:22:59 UTC
Tags:
auto-reg api-base64 crypto-regex pulsar rat
Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Detection:
n/a
Verdict:
Malicious
Score:
99.9%
Tags:
vmdetect quasar emotet
Result
Verdict:
Malware
Maliciousness:
Behaviour
Creating a window
Сreating synchronization primitives
Creating a file in the %AppData% subdirectories
Launching a process
DNS request
Connection attempt
Enabling autorun by creating a file
Verdict:
Malicious
Threat level:
10/10
Confidence:
100%
Tags:
anti-debug anti-vm anti-vm base64 cmd cmstp cscript evasive explorer fingerprint hacktool lolbin mshta netsh obfuscated overlay packed packed privilege reconnaissance runonce schtasks update
Verdict:
Malicious
Labled as:
Backdoor_Win32_PulsarRat_AR_AMTB
Verdict:
Malicious
File Type:
exe x32
Detections:
PDM:Trojan.Win32.Generic HEUR:Trojan-Dropper.MSIL.Agent.gen HEUR:Trojan-Banker.MSIL.ClipBanker.gen HEUR:Trojan.MSIL.R77.gen HEUR:Exploit.MSIL.BypassUAC.gen Backdoor.MSIL.PulsarRAT.sb PDM:Trojan.Win32.Tasker.cust Trojan-PSW.MSIL.Agent.sb HEUR:HackTool.Win64.Disabler.pefng HEUR:HackTool.Win64.Disabler.gen HEUR:Exploit.MSIL.BypassUAC.c NetTool.TunnelLocaltonet.UDP.C&C
Verdict:
Malicious
Result
Threat name:
Quasar
Detection:
malicious
Classification:
troj.spyw.expl.evad
Score:
100 / 100
Signature
.NET source code contains potential unpacker
.NET source code contains process injector
.NET source code contains very large strings
.NET source code references suspicious native API functions
Antivirus / Scanner detection for submitted sample
Antivirus detection for dropped file
Contains functionality to disable the Task Manager (.Net Source)
Found malware configuration
Hides that the sample has been downloaded from the Internet (zone.identifier)
Installs a global keyboard hook
Joe Sandbox ML detected suspicious sample
Malicious sample detected (through community Yara rule)
Multi AV Scanner detection for dropped file
Multi AV Scanner detection for submitted file
Potential Privilege Escalation using Task Scheduler highest RunLevel
Sample uses string decryption to hide its real strings
Tries to detect sandboxes and other dynamic analysis tools (process name or module or function)
Uses schtasks.exe or at.exe to add and modify task schedules
Yara detected AntiVM3
Yara detected EXE embedded in BAT file
Yara detected Quasar RAT
Yara detected UAC Bypass using CMSTP
Behaviour
Behavior Graph:
Score:
99%
Verdict:
Malware
File Type:
PE
Verdict:
QuasarRat
YARA:
16 match(es)
Tags:
.Net Base64 Block Base64 Payload Contains Base64 Block Executable Fody/Costura Packer Html Malicious Managed .NET PDB Path PE (Portable Executable) PE File Layout QuasarRat RAT SOS: 0.14 SOS: 0.15 SOS: 0.18 SOS: 0.19 SOS: 0.20 SOS: 0.22 SOS: 0.23 SOS: 0.24 SOS: 0.25 SOS: 0.26 SOS: 0.27 SOS: 0.29 SOS: 0.32 SOS: 0.34 SOS: 0.35 SOS: 0.63 Win 32 Exe x86
Malware Config
C2 Extraction:
PORT: ChainingModeGCM
CNC: ChainingModeGCM
CNC: ChainingModeGCM
Verdict:
Malicious
Threat:
Family.PULSARRAT
Threat name:
Win32.Backdoor.PulsarRat
Status:
Malicious
First seen:
2026-03-15 22:22:14 UTC
File Type:
PE (.Net Exe)
Extracted files:
17
AV detection:
28 of 36 (77.78%)
Threat level:
5/5
Detection(s):
Suspicious file
Verdict:
malicious
Label(s):
quasarrat
Similar samples:
+ 593 additional samples on MalwareBazaar
Result
Malware family:
quasar
Score:
10/10
Tags:
family:customerloader family:quasar botnet:$$$ downloader execution loader persistence spyware trojan
Behaviour
Scheduled Task/Job: Scheduled Task
Suspicious behavior: AddClipboardFormatListener
Suspicious use of AdjustPrivilegeToken
Suspicious use of SetWindowsHookEx
Suspicious use of WriteProcessMemory
Uses Task Scheduler COM API
Executes dropped EXE
Customer Loader
Customerloader family
Quasar RAT
Quasar family
Quasar payload
Malware Config
C2 Extraction:
xjt4wnlhmi.localto.net:3950
Unpacked files
SH256 hash:
1c021645e4b0340f968f6909823b642e01b577fdb878b76368d55e7895c3e96e
MD5 hash:
827089f7d928c6dcb73bb33d0ff0affb
SHA1 hash:
3f2cb7db69441f95097d9e422ddf217f9e975666
Detections:
QuasarRAT
SH256 hash:
32ddcc8ec426baf56816514447c6cef2ef81b20b145946e7533401d3eb0ca929
MD5 hash:
ff508c605092d6aaf88651c4406162fb
SHA1 hash:
6986dd0dc239754ae457da779f065d70335190a5
Malware family:
QuasarRAT
Verdict:
Malicious
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
iSpy Keylogger
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: | Check_Dlls |
|---|
| Rule name: | Costura_Protobuf |
|---|---|
| Author: | @bartblaze |
| Description: | Identifies Costura and Protobuf in .NET assemblies, respectively for storing resources and (de)serialization. Seen together might indicate a suspect binary. |
| Rule name: | CP_Script_Inject_Detector |
|---|---|
| Author: | DiegoAnalytics |
| Description: | Detects attempts to inject code into another process across PE, ELF, Mach-O binaries |
| Rule name: | DebuggerCheck__API |
|---|---|
| Reference: | https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara |
| Rule name: | DebuggerCheck__QueryInfo |
|---|---|
| Reference: | https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara |
| Rule name: | DebuggerHiding__Thread |
|---|---|
| Reference: | https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara |
| Rule name: | DetectEncryptedVariants |
|---|---|
| Author: | Zinyth |
| Description: | Detects 'encrypted' in ASCII, Unicode, base64, or hex-encoded |
| Rule name: | Detect_PowerShell_Obfuscation |
|---|---|
| Author: | daniyyell |
| Description: | Detects obfuscated PowerShell commands commonly used in malicious scripts. |
| Rule name: | Disable_Defender |
|---|---|
| Author: | iam-py-test |
| Description: | Detect files disabling or modifying Windows Defender, Windows Firewall, or Microsoft Smartscreen |
| Rule name: | FreddyBearDropper |
|---|---|
| Author: | Dwarozh Hoshiar |
| Description: | Freddy Bear Dropper is dropping a malware through base63 encoded powershell scrip. |
| Rule name: | golang_bin_JCorn_CSC846 |
|---|---|
| Author: | Justin Cornwell |
| Description: | CSC-846 Golang detection ruleset |
| Rule name: | INDICATOR_EXE_Packed_Fody |
|---|---|
| Author: | ditekSHen |
| Description: | Detects executables manipulated with Fody |
| Rule name: | Indicator_MiniDumpWriteDump |
|---|---|
| Author: | Obscurity Labs LLC |
| Description: | Detects PE files and PowerShell scripts that use MiniDumpWriteDump either through direct imports or string references |
| Rule name: | INDICATOR_SUSPICIOUS_EXE_NoneWindowsUA |
|---|---|
| Author: | ditekSHen |
| Description: | Detects Windows executables referencing non-Windows User-Agents |
| Rule name: | INDICATOR_SUSPICIOUS_EXE_SandboxHookingDLL |
|---|---|
| Author: | ditekSHen |
| Description: | Detects binaries and memory artifacts referencing sandbox DLLs typically observed in sandbox evasion |
| Rule name: | INDICATOR_SUSPICIOUS_EXE_UACBypass_CMSTPCMD |
|---|---|
| Author: | ditekSHen |
| Description: | Detects Windows exceutables bypassing UAC using CMSTP utility, command line and INF |
| Rule name: | MAL_QuasarRAT_May19_1 |
|---|---|
| Author: | Florian Roth (Nextron Systems) |
| Description: | Detects QuasarRAT malware |
| Reference: | https://blog.ensilo.com/uncovering-new-activity-by-apt10 |
| Rule name: | MAL_QuasarRAT_May19_1 |
|---|---|
| Description: | Detects QuasarRAT malware |
| Rule name: | MAL_QuasarRAT_May19_1_RID2E1E |
|---|---|
| Author: | Florian Roth |
| Description: | Detects QuasarRAT malware |
| Reference: | https://blog.ensilo.com/uncovering-new-activity-by-apt10 |
| Rule name: | Multifamily_RAT_Detection |
|---|---|
| Author: | Lucas Acha (http://www.lukeacha.com) |
| Description: | Generic Detection for multiple RAT families, PUPs, Packers and suspicious executables |
| Rule name: | NET |
|---|---|
| Author: | malware-lu |
| Rule name: | NETexecutableMicrosoft |
|---|---|
| Author: | malware-lu |
| Rule name: | pe_imphash |
|---|
| Rule name: | Pulsar_RAT |
|---|---|
| Author: | @bartblaze |
| Description: | Identifies Pulsar RAT, based on Quasar RAT. |
| Reference: | https://malpedia.caad.fkie.fraunhofer.de/details/win.pulsar_rat |
| Rule name: | RANSOMWARE |
|---|---|
| Author: | ToroGuitar |
| Rule name: | Skystars_Malware_Imphash |
|---|---|
| Author: | Skystars LightDefender |
| Description: | imphash |
| Rule name: | Sus_CMD_Powershell_Usage |
|---|---|
| Author: | XiAnzheng |
| Description: | May Contain(Obfuscated or no) Powershell or CMD Command that can be abused by threat actor(can create FP) |
| Rule name: | telebot_framework |
|---|---|
| Author: | vietdx.mb |
File information
The table below shows additional information about this malware sample such as delivery method and external references.
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