MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 f27bb91b7989b0de1e3ebe9f1378e27f9cccf0a71590db04f12db9d5151fe6e3. 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

Intelligence 13 IOCs YARA 30 File information Comments

SHA256 hash:	f27bb91b7989b0de1e3ebe9f1378e27f9cccf0a71590db04f12db9d5151fe6e3
SHA3-384 hash:	0a1e85601a8fa5ab4b0b714be39b9db767429f7151c7cb477cd6692935e19c33aad88bdcde22fe676b00c150e70e2b1a
SHA1 hash:	63bf39d01d0fdf29fb17f0fccef6d341c94e7b6a
MD5 hash:	423246b097e0b9abc5e3499de2b4fc01
humanhash:	quebec-winter-high-salami
File name:	Python.exe
Download:	download sample
Signature	QuasarRAT Create hunting rule
File size:	3'266'560 bytes
First seen:	2025-12-23 17:23:25 UTC
Last seen:	2025-12-23 17:32:21 UTC
File type:	exe
MIME type:	application/x-dosexec
imphash	f34d5f2d4577ed6d9ceec516c1f5a744 (48'744 x AgentTesla, 19'609 x Formbook, 12'242 x SnakeKeylogger)
ssdeep	49152:Zv9zn3r24paQe+GPhlz1Tt6U7PkDDQRJ6MbR3LoGdT3THHB72eh2NT:ZvFr24paQe+GPhlz1TwU7PkDDQRJ6W
Threatray	1'878 similar samples on MalwareBazaar
TLSH	T17EE56B143BF85E27E1BBE677E5B0041267F0FC1AB363EB0B6581677A1C53B5098026A7
TrID	58.7% (.EXE) Generic CIL Executable (.NET, Mono, etc.) (73123/4/13) 13.2% (.EXE) Microsoft Visual C++ compiled executable (generic) (16529/12/5) 8.4% (.EXE) Win64 Executable (generic) (10522/11/4) 5.2% (.DLL) Win32 Dynamic Link Library (generic) (6578/25/2) 4.0% (.EXE) Win16 NE executable (generic) (5038/12/1)
Magika	pebin
Reporter	Anonymous
Tags:	botnet c2 exe QuasarRAT RAT

Intelligence

File Origin

# of uploads :

# of downloads :

Origin country :

Vendor Threat Intelligence

Details

Link:

https://research.acce.ciphertechsolutions.com/results/d93708d9-ae6d-4f3d-b12f-c1d92031205a/

Detection:

QuasarRAT

Link:

https://www.capesandbox.com/analysis/45910/

Detection(s):

Win.Malware.Generic-9883083-0

Win.Malware.Msilheracles-9900242-0

ditekSHen.MALWARE.Win.Trojan.QuasarStealer.UNOFFICIAL

Win.Packed.Downeks-6898097-0

Verdict:

Malicious

Score:

99.9%

Link:

https://cyber-fortress.com/docs/result/index.php?id=694b93f6038f10550b5540c5

Tags:

infosteal autorun quasar

Verdict:

Malicious

File Type:

exe x32

First seen:

2025-12-23T15:18:00Z UTC

Last seen:

2025-12-23T18:26:00Z UTC

Hits:

~10

Detections:

Trojan.Win32.Quasar.sb Trojan.MSIL.Quasar.a HEUR:Trojan-Spy.MSIL.Agent.sb HEUR:Trojan.MSIL.Quasar.gen PDM:Trojan.Win32.Tasker.cust PDM:Trojan.Win32.Generic Trojan-PSW.Win32.Stealer.sb Trojan-PSW.MSIL.Agent.sb

Link:

https://opentip.kaspersky.com/f27bb91b7989b0de1e3ebe9f1378e27f9cccf0a71590db04f12db9d5151fe6e3/results?tab=lookup

Score:

99%

Verdict:

Malware

File Type:

Link:

https://malprob.io/report/f27bb91b7989b0de1e3ebe9f1378e27f9cccf0a71590db04f12db9d5151fe6e3

Verdict:

inconclusive

YARA:

14 match(es)

Tags:

.Net Executable Managed .NET PE (Portable Executable) PE File Layout SOS: 0.31 Win 32 Exe x86

Link:

https://app.malva.re/file/423246b097e0b9abc5e3499de2b4fc01

Gathering data

Verdict:

Malicious

Threat:

Family.QUASARRAT

Link:

https://tip.neiki.dev/file/f27bb91b7989b0de1e3ebe9f1378e27f9cccf0a71590db04f12db9d5151fe6e3

Threat name:

ByteCode-MSIL.Backdoor.Quasar

Status:

Malicious

First seen:

2025-12-23 19:36:40 UTC

File Type:

PE (.Net Exe)

Extracted files:

AV detection:

30 of 36 (83.33%)

Threat level:

5/5

Detection(s):

Suspicious file

Link:

https://check.spamhaus.org/check/?searchterm=6j53sg3zrgyn4hr6x2prg6hcp6omz4fhcwinwbhrfw45kfi743rq._file

Verdict:

malicious

Label(s):

quasarrat

QuasarRAT

436575800b95744469c08b2b05fcd3bda915278c57d1d890ce3288e82a88c32a

QuasarRAT

7a5be1773b8383037113747990bf1798b072e8563773f3de3c23e3e99f2da25c

QuasarRAT

8056a37cd65f2a24c5ddb99843cc744d8f78f7befd95dcd77f9c4c5bfc6f45d3

QuasarRAT

error

QuasarRAT

f5e49e7ec748a0b4cfdecdddc5fdfaf9f5b7f38f73e962a4017b402ba8143d02

QuasarRAT

+ 1'868 additional samples on MalwareBazaar

Result

Malware family:

quasar

Score:

10/10

Tags:

family:quasar botnet:user1 discovery execution persistence spyware trojan

Link:

https://tria.ge/reports/251225-nybd5saq51/

Behaviour

Runs ping.exe

Scheduled Task/Job: Scheduled Task

Suspicious use of AdjustPrivilegeToken

Suspicious use of SetWindowsHookEx

Suspicious use of WriteProcessMemory

Uses Task Scheduler COM API

Enumerates physical storage devices

System Network Configuration Discovery: Internet Connection Discovery

Checks computer location settings

Executes dropped EXE

Quasar RAT

Quasar family

Quasar payload

Malware Config

C2 Extraction:

78win88.co.com:80
www.78win88.co.com:80
download.78win88.co.com:80
api.78win88.co.com:80
78win88.co.com:4782
www.78win88.co.com:4782
download.78win88.co.com:4782
api.78win88.co.com:4782
78win88.co.com:443
www.78win88.co.com:443
download.78win88.co.com:443
api.78win88.co.com:443

Verdict:

Malicious

Tags:

stealer rat quasar_rat Win.Malware.Generic-9883083-0

YARA:

MALWARE_Win_Quasarstealer MAL_QuasarRAT_May19_1 malware_windows_quasarrat win_quasar_rat_client

Link:

https://app.threat.zone/submission/c12f60e9-9332-45ea-b2f6-7bff8f4c8550

Malware family:

QuasarRAT

Verdict:

Malicious

Link:

https://www.vmray.com/analyses/_mb/f27bb91b7989/report/overview.html

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

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:	BLOWFISH_Constants Create hunting rule
Author:	phoul (@phoul)
Description:	Look for Blowfish constants

Rule name:	CP_Script_Inject_Detector Create hunting rule
Author:	DiegoAnalytics
Description:	Detects attempts to inject code into another process across PE, ELF, Mach-O binaries

Rule name:	DetectEncryptedVariants Create hunting rule
Author:	Zinyth
Description:	Detects 'encrypted' in ASCII, Unicode, base64, or hex-encoded

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

Rule name:	Diff_QuasarRAT_01 Create hunting rule
Author:	schmidtsz
Description:	Identify QuasarRAT samples

Rule name:	FreddyBearDropper Create hunting rule
Author:	Dwarozh Hoshiar
Description:	Freddy Bear Dropper is dropping a malware through base63 encoded powershell scrip.

Rule name:	INDICATOR_SUSPICIOUS_Binary_References_Browsers Create hunting rule
Author:	ditekSHen
Description:	Detects binaries (Windows and macOS) referencing many web browsers. Observed in information stealers.

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

Rule name:	INDICATOR_SUSPICIOUS_GENInfoStealer Create hunting rule
Author:	ditekSHen
Description:	Detects executables containing common artifacts observed in infostealers

Rule name:	Lumma_Stealer_Detection Create hunting rule
Author:	ashizZz
Description:	Detects a specific Lumma Stealer malware sample using unique strings and behaviors
Reference:	https://seanthegeek.net/posts/compromized-store-spread-lumma-stealer-using-fake-captcha/

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

Rule name:	MAL_QuasarRAT_May19_1 Create hunting rule
Description:	Detects QuasarRAT malware

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:	MD5_Constants Create hunting rule
Author:	phoul (@phoul)
Description:	Look for MD5 constants

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:	NETexecutableMicrosoft 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:	RC6_Constants Create hunting rule
Author:	chort (@chort0)
Description:	Look for RC6 magic constants in binary
Reference:	https://twitter.com/mikko/status/417620511397400576

Rule name:	RIPEMD160_Constants Create hunting rule
Author:	phoul (@phoul)
Description:	Look for RIPEMD-160 constants

Rule name:	SHA1_Constants Create hunting rule
Author:	phoul (@phoul)
Description:	Look for SHA1 constants

Rule name:	SHA512_Constants Create hunting rule
Author:	phoul (@phoul)
Description:	Look for SHA384/SHA512 constants

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

Rule name:	Sus_CMD_Powershell_Usage Create hunting rule
Author:	XiAnzheng
Description:	May Contain(Obfuscated or no) Powershell or CMD Command that can be abused by threat actor(can create FP)

Rule name:	Windows_Generic_Threat_803feff4 Create hunting rule
Author:	Elastic Security

Rule name:	win_quasar_rat_client Create hunting rule
Author:	Matthew @ Embee_Research
Description:	Detects strings present in Quasar Rat Samples.

File information

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

Web download

QuasarRAT

exe f27bb91b7989b0de1e3ebe9f1378e27f9cccf0a71590db04f12db9d5151fe6e3

(this sample)

Link

https://www.filescan.io/uploads/694acd6de126b9ff438eab7e/reports/e111123e-575e-44f7-a9d9-3788a7ca826b/overview

Delivery method

Distributed via web download

Cape

https://www.capesandbox.com/analysis/45910/

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