MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 3045c4c630d44383a7153d9d13e4cdaa3284095cb580627a9adb0b9e4033d9e3. 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: 14

Intelligence 14 IOCs YARA 28 File information Comments

SHA256 hash:	3045c4c630d44383a7153d9d13e4cdaa3284095cb580627a9adb0b9e4033d9e3
SHA3-384 hash:	f13b365365ccead0bc014bcdf568a037bd9da2ff788c3a80e3b930a4592ef0d2218fb4d8cc6d0749a4b7ca0848dc3538
SHA1 hash:	48cc23bc7e9beb88f80073a07fe4948d9328df52
MD5 hash:	66306da795ed0e2ba7652f6749fe22cf
humanhash:	georgia-mango-solar-nitrogen
File name:	Natsu.exe
Download:	download sample
Signature	QuasarRAT Create hunting rule
File size:	3'701'248 bytes
First seen:	2025-03-31 07:05:32 UTC
Last seen:	Never
File type:	exe
MIME type:	application/x-dosexec
imphash	f34d5f2d4577ed6d9ceec516c1f5a744 (48'652 x AgentTesla, 19'463 x Formbook, 12'205 x SnakeKeylogger)
ssdeep	24576:nqCkq8mKTk3T8LEtk4B/2Hk/p9Ql+a0/PpbjtLGwZfGpq+kRZ5xN2lAL3/2d5n9M:EQGFIamGG
Threatray	7 similar samples on MalwareBazaar
TLSH	T1B806A6242DEF505D73B3AFA15FD8B8FF896EF673260A60BA205107468722D80DD91739
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
Reporter	skocherhan
Tags:	DestinyStealer exe QuasarRAT

skocherhan

https://destinystealer.com/Natsu.exe

Intelligence

File Origin

# of uploads :

# of downloads :

410

Origin country :

Vendor Threat Intelligence

Malware family:

n/a

ID:

File name:

svchost.exe

Verdict:

No threats detected

Analysis date:

2025-03-30 18:18:05 UTC

Tags:

n/a

Link:

https://app.any.run/tasks/59173d81-5b19-4527-8fc0-85e786c8ff6a

Note:

ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample

Verdict:

Malicious

Score:

96.5%

Link:

https://cyber-fortress.com/docs/result/index.php?id=67ea41c1855e5ec5240ab124

Tags:

bladabindi quasar

Result

Verdict:

Malware

Maliciousness:

Behaviour

Searching for the window

Launching a process

Creating a file

Creating a window

Сreating synchronization primitives

Using the Windows Management Instrumentation requests

Connection attempt

Sending a custom TCP request

DNS request

Creating a file in the %temp% directory

Creating a process with a hidden window

Unauthorized injection to a system process

Adding an exclusion to Microsoft Defender

Verdict:

Likely Malicious

Threat level:

7.5/10

Confidence:

100%

Tags:

cryptor_detected keylogger lolbin obfuscated packed packed reconnaissance regasm

Link:

https://www.filescan.io/uploads/67ea3ee1631830704a8bd813/reports/fd4eff2b-57f2-4754-ba1f-83a9e5b4d46c/overview

Verdict:

Malicious

Labled as:

Win/malicious_confidence_100%

Link:

https://www.hybrid-analysis.com/sample/3045c4c630d44383a7153d9d13e4cdaa3284095cb580627a9adb0b9e4033d9e3

Verdict:

Malicious

Link:

https://analyze.intezer.com/analyses/5e7cae0d-c9ec-4c03-91a9-262bce5e088f

Result

Threat name:

Quasar

Detection:

malicious

Classification:

troj.spyw.evad

Score:

100 / 100

Link:

https://www.joesandbox.com/analysis/1652556

Signature

.NET source code contains potential unpacker

.NET source code contains suspicious base64 encoded strings

.NET source code contains very large strings

.NET source code references suspicious native API functions

Adds a directory exclusion to Windows Defender

Allocates memory in foreign processes

Antivirus / Scanner detection for submitted sample

Antivirus detection for dropped file

Found malware configuration

Hides that the sample has been downloaded from the Internet (zone.identifier)

Injects a PE file into a foreign processes

Installs a global keyboard hook

Joe Sandbox ML detected suspicious sample

Malicious sample detected (through community Yara rule)

Multi AV Scanner detection for submitted file

Queries memory information (via WMI often done to detect virtual machines)

Queries sensitive disk information (via WMI, Win32_DiskDrive, often done to detect virtual machines)

Sample uses string decryption to hide its real strings

Sigma detected: Powershell Base64 Encoded MpPreference Cmdlet

Tries to detect sandboxes and other dynamic analysis tools (process name or module or function)

Writes to foreign memory regions

Yara detected AntiVM3

Yara detected Quasar RAT

Behaviour

Behavior Graph:

Download SVG

Score:

100%

Verdict:

Malware

File Type:

Link:

https://malprob.io/report/3045c4c630d44383a7153d9d13e4cdaa3284095cb580627a9adb0b9e4033d9e3

Detection:

n/a

Link:

https://mwdb.cert.pl/sample/3045c4c630d44383a7153d9d13e4cdaa3284095cb580627a9adb0b9e4033d9e3/

Threat name:

ByteCode-MSIL.Backdoor.Quasar

Status:

Malicious

First seen:

2025-03-30 18:18:07 UTC

File Type:

PE (.Net Exe)

Extracted files:

AV detection:

20 of 24 (83.33%)

Threat level:

5/5

Detection(s):

Suspicious file

Link:

https://check.spamhaus.org/check/?searchterm=gbc4jrrq2rbyhjyvhworhzgnviziick4wwage6u23mfz4qbt3hrq._file

Verdict:

malicious

Label(s):

quasarrat

QuasarRAT

79712e68d88a6d2d87555f24f9dc767868289ce0e70000c14e3e72df1b4a58f9

QuasarRAT

9365b6cee47eecc6eab2c6d138f0d5714c31ff1473143ce14ce874eb896f01b3

QuasarRAT

a67dcfbda4c679aab573e9bea364d8f1a41ea29ce0ae7b609bc16242e3cba434

QuasarRAT

error

QuasarRAT

Result

Malware family:

quasar

Score:

10/10

Tags:

family:quasar botnet:office04 discovery spyware trojan

Link:

https://tria.ge/reports/250331-hw41savvfs/

Behaviour

Suspicious behavior: EnumeratesProcesses

Suspicious use of AdjustPrivilegeToken

Suspicious use of WriteProcessMemory

System Location Discovery: System Language Discovery

Checks for VirtualBox DLLs, possible anti-VM trick

Suspicious use of SetThreadContext

Quasar RAT

Quasar family

Quasar payload

Malware Config

C2 Extraction:

51.89.204.80:4782

Verdict:

Malicious

Tags:

n/a

YARA:

n/a

Link:

https://app.threat.zone/submission/3437f0fa-9ec0-4b72-a273-e629bb9fb643

Unpacked files

SH256 hash:

3045c4c630d44383a7153d9d13e4cdaa3284095cb580627a9adb0b9e4033d9e3

MD5 hash:

66306da795ed0e2ba7652f6749fe22cf

SHA1 hash:

48cc23bc7e9beb88f80073a07fe4948d9328df52

Link:

https://www.unpac.me/results/d30d7b64-0e14-4b53-9105-7a7e89950a09/

SH256 hash:

83f6e0c42e6adbe7cd9f799b4c673dc40ada3f386be2e1ee829d8da1c2200f5c

MD5 hash:

19f02e8a06575b861138f20fe8fcdaf8

SHA1 hash:

f311bdb4a0b9a379e3216f6295b4b471f18f30db

Detections:

QuasarRAT

cn_utf8_windows_terminal

malware_windows_xrat_quasarrat

MAL_QuasarRAT_May19_1

MAL_BackNet_Nov18_1

INDICATOR_EXE_Packed_Fody

INDICATOR_SUSPICIOUS_EXE_SandboxHookingDLL

INDICATOR_SUSPICIOUS_EXE_NoneWindowsUA

MALWARE_Win_QuasarStealer

Link:

https://www.unpac.me/results/d30d7b64-0e14-4b53-9105-7a7e89950a09/

SH256 hash:

43cb1c57a5090d1612ffa8a52ece7e45f49adcbe9c95055d991f69d753b671e2

MD5 hash:

5667a5061e90bca271734c3b91751baa

SHA1 hash:

637717778435163d3282066c0e3c69b67f5f57ac

Detections:

SUSP_NET_Large_Static_Array_In_Small_File_Jan24

MAL_QuasarRAT_May19_1

HKTL_NET_GUID_Quasar

Link:

https://www.unpac.me/results/d30d7b64-0e14-4b53-9105-7a7e89950a09/

Please note that we are no longer able to provide a coverage score for Virus Total.

Threat name:

iSpy Keylogger

Score:

1.00

Link:

https://yomi.yoroi.company/submissions/3045c4c630d44383a7153d9d13e4cdaa3284095cb580627a9adb0b9e4033d9e3

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 Create hunting rule

Rule name:	Costura_Protobuf Create hunting rule
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:	DebuggerCheck__API Create hunting rule
Reference:	https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara

Rule name:	DebuggerCheck__QueryInfo Create hunting rule
Reference:	https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara

Rule name:	DebuggerHiding__Thread Create hunting rule
Reference:	https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara

Rule name:	Detect_PowerShell_Obfuscation Create hunting rule
Author:	daniyyell
Description:	Detects obfuscated PowerShell commands commonly used in malicious scripts.

Rule name:	INDICATOR_EXE_Packed_Fody Create hunting rule
Author:	ditekSHen
Description:	Detects executables manipulated with Fody

Rule name:	INDICATOR_SUSPICIOUS_EXE_NoneWindowsUA Create hunting rule
Author:	ditekSHen
Description:	Detects Windows executables referencing non-Windows User-Agents

Rule name:	INDICATOR_SUSPICIOUS_EXE_SandboxHookingDLL Create hunting rule
Author:	ditekSHen
Description:	Detects binaries and memory artifacts referencing sandbox DLLs typically observed in sandbox evasion

Rule name:	MALWARE_Win_QuasarStealer Create hunting rule
Author:	ditekshen
Description:	Detects Quasar infostealer

Rule name:	MAL_BackNet_Nov18_1 Create hunting rule
Author:	Florian Roth (Nextron Systems)
Description:	Detects BackNet samples
Reference:	https://github.com/valsov/BackNet

Rule name:	MAL_BackNet_Nov18_1_RID2D6D Create hunting rule
Author:	Florian Roth
Description:	Detects BackNet samples
Reference:	https://github.com/valsov/BackNet

Rule name:	MAL_QuasarRAT_May19_1 Create hunting rule
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_RID2E1E Create hunting rule
Author:	Florian Roth
Description:	Detects QuasarRAT malware
Reference:	https://blog.ensilo.com/uncovering-new-activity-by-apt10

Rule name:	Multifamily_RAT_Detection Create hunting rule
Author:	Lucas Acha (http://www.lukeacha.com)
Description:	Generic Detection for multiple RAT families, PUPs, Packers and suspicious executables

Rule name:	NET Create hunting rule
Author:	malware-lu

Rule name:	pe_imphash Create hunting rule

Rule name:	quasarrat Create hunting rule
Author:	jeFF0Falltrades

Rule name:	quasarrat_kingrat Create hunting rule
Author:	jeFF0Falltrades

Rule name:	RANSOMWARE Create hunting rule
Author:	ToroGuitar

Rule name:	Skystars_Malware_Imphash Create hunting rule
Author:	Skystars LightDefender
Description:	imphash

Rule name:	ThreadControl__Context Create hunting rule
Reference:	https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara

File information

The table below shows additional information about this malware sample such as delivery method and external references.

42c82de3d3ed0cc0fb8c97bd20557275d6f92b901651aa16043e1fa35bff488e

QuasarRAT

exe 3045c4c630d44383a7153d9d13e4cdaa3284095cb580627a9adb0b9e4033d9e3

(this sample)

Dropped by

SHA256 42c82de3d3ed0cc0fb8c97bd20557275d6f92b901651aa16043e1fa35bff488e

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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