MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 b807c38ee39c19386a5483070bdaf554dc3904658d25b6fdea79b49f3849e95d. 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: 20

Intelligence 20 IOCs YARA 28 File information Comments 1

SHA256 hash:	b807c38ee39c19386a5483070bdaf554dc3904658d25b6fdea79b49f3849e95d
SHA3-384 hash:	a39bf31618100e96ae6a93668e584764e427eda4bba00f0327f9a7756d16ddad1d167631180f2de0ab13cdb2908f7e9e
SHA1 hash:	006cc9c9b946521a889650e16381859fef5d3f57
MD5 hash:	dd68d711b341a01fadc92f45ecd6eb1f
humanhash:	paris-skylark-island-louisiana
File name:	SecuriteInfo.com.MSIL.Quasar-A.18125156
Download:	download sample
Signature	QuasarRAT Create hunting rule
File size:	3'265'536 bytes
First seen:	2026-02-27 02:17:46 UTC
Last seen:	2026-02-27 03:37:00 UTC
File type:	exe
MIME type:	application/x-dosexec
imphash	f34d5f2d4577ed6d9ceec516c1f5a744 (48'855 x AgentTesla, 19'783 x Formbook, 12'304 x SnakeKeylogger)
ssdeep	49152:Ovkt62XlaSFNWPjljiFa2RoUYIWZuqbjmZvYoVdbQsTHHB72eh2NT:Ov462XlaSFNWPjljiFXRoUYIKuqbNx
Threatray	2'127 similar samples on MalwareBazaar
TLSH	T1E8E54A1477F85E22E1AAD373D5F1541763F0FC2AF3A3EB0B6191667A1C93B4088426A7
TrID	60.7% (.EXE) Generic CIL Executable (.NET, Mono, etc.) (73123/4/13) 13.7% (.EXE) Microsoft Visual C++ compiled executable (generic) (16529/12/5) 5.4% (.DLL) Win32 Dynamic Link Library (generic) (6578/25/2) 5.4% (.EXE) Win64 Executable (generic) (6522/11/2) 4.1% (.EXE) Win16 NE executable (generic) (5038/12/1)
Magika	pebin
Reporter	SecuriteInfoCom
Tags:	exe QuasarRAT

Intelligence

File Origin

# of uploads :

# of downloads :

146

Origin country :

Vendor Threat Intelligence

Details

Link:

https://research.acce.ciphertechsolutions.com/results/93048777-a9ba-4063-9624-d90c03a1354f/

Malware family:

quasar

ID:

File name:

quasar.exe

Verdict:

Malicious activity

Analysis date:

2026-02-26 13:17:15 UTC

Tags:

quasar

Link:

https://app.any.run/tasks/15e1af41-3e4a-4303-a681-c549b3e28707

Note:

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

Detection:

QuasarStealer

Link:

https://www.capesandbox.com/analysis/54799/

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:

97.4%

Link:

https://cyber-fortress.com/docs/result/index.php?id=69a06c2f8fffa866e3b26e5f

Tags:

infosteal autorun quasar

Verdict:

Malicious

Threat level:

10/10

Confidence:

100%

Tags:

anti-vm base64 certreq expand explorer fingerprint infostealer lolbin obfuscated quasar quasarrat reconnaissance runonce schtasks soft-404 stealer tiger unsafe windows

Link:

https://www.filescan.io/uploads/69a0fee7d967dbda74ef2ff3/reports/0666be40-18ea-48f5-8a9e-91d5feabb3ca/overview

Verdict:

Malicious

Labled as:

Win/malicious_confidence_100%

Link:

https://www.hybrid-analysis.com/sample/b807c38ee39c19386a5483070bdaf554dc3904658d25b6fdea79b49f3849e95d

Verdict:

Malicious

File Type:

exe x32

Detections:

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

Link:

https://opentip.kaspersky.com/b807c38ee39c19386a5483070bdaf554dc3904658d25b6fdea79b49f3849e95d/results?tab=lookup

Malware family:

Quasar RAT

Verdict:

Malicious

Link:

https://analyze.intezer.com/analyses/4a0cfd4c-dcae-4c57-9d88-88ea5b599ebf

Score:

99%

Verdict:

Malware

File Type:

Link:

https://malprob.io/report/b807c38ee39c19386a5483070bdaf554dc3904658d25b6fdea79b49f3849e95d

Gathering data

Detection:

quasar

Link:

https://mwdb.cert.pl/sample/b807c38ee39c19386a5483070bdaf554dc3904658d25b6fdea79b49f3849e95d/

Verdict:

Malicious

Threat:

Family.QUASARRAT

Link:

https://tip.neiki.dev/file/b807c38ee39c19386a5483070bdaf554dc3904658d25b6fdea79b49f3849e95d

Threat name:

ByteCode-MSIL.Backdoor.Quasar

Status:

Malicious

First seen:

2026-02-22 13:36:44 UTC

File Type:

PE (.Net Exe)

Extracted files:

AV detection:

30 of 36 (83.33%)

Threat level:

5/5

Detection(s):

Malicious file

Link:

https://check.spamhaus.org/check/?searchterm=xad4hdxdtqmtq2suqmdqxwxvktodsbdfrus3n7pkpg2j6ocj5foq._file

Verdict:

malicious

Label(s):

quasarrat

QuasarRAT

7cf92236a23833476c9e91eabf6bf023de5572b65a62da1e6cb9be39247162a6

QuasarRAT

c1b011778271c50b58e7d1cc972434f98671118a3dd381dc4fd5f52b5f2c42a2

QuasarRAT

e78c16daddee864b284f81c9e66f2dacb340ae7670a3a1b1735bde8619246e29

QuasarRAT

error

QuasarRAT

+ 2'117 additional samples on MalwareBazaar

Result

Malware family:

quasar

Score:

10/10

Tags:

family:quasar botnet:office04 execution persistence spyware trojan

Link:

https://tria.ge/reports/260227-crdp5sfz6a/

Behaviour

Scheduled Task/Job: Scheduled Task

Suspicious use of AdjustPrivilegeToken

Suspicious use of SetWindowsHookEx

Suspicious use of WriteProcessMemory

Uses Task Scheduler COM API

Executes dropped EXE

Quasar RAT

Quasar family

Quasar payload

Malware Config

C2 Extraction:

91.232.103.250:3250

Unpacked files

SH256 hash:

b807c38ee39c19386a5483070bdaf554dc3904658d25b6fdea79b49f3849e95d

MD5 hash:

dd68d711b341a01fadc92f45ecd6eb1f

SHA1 hash:

006cc9c9b946521a889650e16381859fef5d3f57

Detections:

QuasarRAT

Link:

https://www.unpac.me/results/8ba3f0c2-42bd-4bee-92cb-6308237000dd/

Malware family:

QuasarRAT

Verdict:

Malicious

Link:

https://www.vmray.com/analyses/_mb/b807c38ee39c/report/overview.html

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/b807c38ee39c19386a5483070bdaf554dc3904658d25b6fdea79b49f3849e95d

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:	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:	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 b807c38ee39c19386a5483070bdaf554dc3904658d25b6fdea79b49f3849e95d

(this sample)

URLhaus

https://urlhaus.abuse.ch/url/3786328/

Delivery method

Distributed via web download

Cape

https://www.capesandbox.com/analysis/54799/

Comments

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commented on 2026-02-27 02:21:17 UTC

RAT King Parser (https://github.com/jeFF0Falltrades/rat_king_parser) Output:

{
"sha256": "b807c38ee39c19386a5483070bdaf554dc3904658d25b6fdea79b49f3849e95d",
"yara_possible_family": "quasarrat",
"key": "ce43edfc1f9d73462812fcdba72578eab8d2855f7bc83e6731a4314c17174f9d",
"salt": "bfeb1e56fbcd973bb219022430a57843003d5644d21e62b9d4f180e7e6c33941",
"config": {
"obfuscated_key_1": "1.4.1",
"obfuscated_key_2": "91.232.103.250:3250;",
"obfuscated_key_3": 3000,
"obfuscated_key_4": "APPLICATIONDATA",
"obfuscated_key_5": "SecurityHealth",
"obfuscated_key_6": "fontdrvhost.exe",
"obfuscated_key_7": true,
"obfuscated_key_8": true,
"obfuscated_key_9": "c58c0a86-0f48-494c-9747-c149992f46bb",
"obfuscated_key_10": "fontdrvhost",
"obfuscated_key_11": true,
"obfuscated_key_12": true,
"obfuscated_key_13": "1489745B5C5F066B8BEAEC7181567513CA9EAFD2",
"obfuscated_key_14": "Office04",
"obfuscated_key_15": "Logs",
"obfuscated_key_16": "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",
"obfuscated_key_17": "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",
"obfuscated_key_18": true,
"obfuscated_key_19": true,
"obfuscated_key_20": "",
"obfuscated_key_21": "",
"obfuscated_key_22": true
}
}