MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 5ff2becf2c56500cb71898f661c863e647a96af33db38d84d7921dc7dbf4f642. 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: 18

Intelligence 18 IOCs YARA 25 File information Comments

SHA256 hash:	5ff2becf2c56500cb71898f661c863e647a96af33db38d84d7921dc7dbf4f642
SHA3-384 hash:	ba64a36bac779e1ba042fde1c635b937665d62b0c213445c29ca5eb01b281cc21dcea226d7b5c9e41528ce349f9ecfc2
SHA1 hash:	0efa03e7412e7e15868c93604372d2b2e6b80662
MD5 hash:	ff8c68c60f122eb7f8473106d4bcf26c
humanhash:	wyoming-victor-virginia-alpha
File name:	Servers.exe
Download:	download sample
Signature	QuasarRAT Create hunting rule
File size:	3'266'048 bytes
First seen:	2025-01-15 06:54:56 UTC
Last seen:	2025-01-17 06:08:32 UTC
File type:	exe
MIME type:	application/x-dosexec
imphash	f34d5f2d4577ed6d9ceec516c1f5a744 (49'076 x AgentTesla, 20'036 x Formbook, 12'353 x SnakeKeylogger)
ssdeep	49152:XvPD/2oga6ctePEl3s3jn7HZkgoZbnmz9QnGdBTHHB72eh2NT:XvL/2oga6ctePEl3s3L7HZkgoZbb
TLSH	T13EE55A1577F85E22E1ABD3B2D5F0541363F0F82AF3A3EB0B5191677A1C93B4098426A7
TrID	40.1% (.EXE) Generic CIL Executable (.NET, Mono, etc.) (73123/4/13) 31.6% (.CPL) Windows Control Panel Item (generic) (57583/11/19) 9.0% (.EXE) Microsoft Visual C++ compiled executable (generic) (16529/12/5) 5.7% (.EXE) Win64 Executable (generic) (10522/11/4) 3.6% (.DLL) Win32 Dynamic Link Library (generic) (6578/25/2)
Magika	pebin
Reporter	lontze7
Tags:	exe QuasarRAT

Intelligence

File Origin

# of uploads :

# of downloads :

436

Origin country :

Vendor Threat Intelligence

Malware family:

quasar

ID:

File name:

Servers.exe

Verdict:

Malicious activity

Analysis date:

2025-01-15 06:58:56 UTC

Tags:

quasar

Link:

https://app.any.run/tasks/b2839f1c-9624-4f12-a556-9a6c7f68c6f5

Note:

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

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=67875bcdaa9c8e7858ded6fd

Tags:

infosteal autorun quasar

Result

Verdict:

Malware

Maliciousness:

Behaviour

Creating a window

Сreating synchronization primitives

Creating a file in the %AppData% subdirectories

Launching a process

Enabling autorun by creating a file

Verdict:

Malicious

Labled as:

MSIL.PasswordStealerA.Generic

Link:

https://www.hybrid-analysis.com/sample/5ff2becf2c56500cb71898f661c863e647a96af33db38d84d7921dc7dbf4f642

Malware family:

Quasar RAT

Verdict:

Malicious

Link:

https://analyze.intezer.com/analyses/7b8b1560-296e-48ad-ade8-a75c7b585786

Result

Threat name:

Quasar

Detection:

malicious

Classification:

troj.spyw.evad

Score:

100 / 100

Link:

https://www.joesandbox.com/analysis/1591614

Signature

AI detected suspicious sample

Antivirus / Scanner detection for submitted sample

Antivirus detection for dropped file

C2 URLs / IPs found in malware configuration

Found malware configuration

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

Installs a global keyboard hook

Machine Learning detection for dropped file

Machine Learning detection for sample

Malicious sample detected (through community Yara rule)

Multi AV Scanner detection for dropped file

Multi AV Scanner detection for submitted file

Sigma detected: Schedule system process

Uses schtasks.exe or at.exe to add and modify task schedules

Yara detected Generic Downloader

Yara detected Quasar RAT

Behaviour

Behavior Graph:

Download SVG

Score:

100%

Verdict:

Malware

File Type:

Link:

https://malprob.io/report/5ff2becf2c56500cb71898f661c863e647a96af33db38d84d7921dc7dbf4f642

Detection:

quasar

Link:

https://mwdb.cert.pl/sample/5ff2becf2c56500cb71898f661c863e647a96af33db38d84d7921dc7dbf4f642/

Threat name:

ByteCode-MSIL.Backdoor.Quasar

Status:

Malicious

First seen:

2025-01-15 06:55:08 UTC

File Type:

PE (.Net Exe)

Extracted files:

AV detection:

22 of 24 (91.67%)

Threat level:

5/5

Detection(s):

Suspicious file

Link:

https://check.spamhaus.org/check/?searchterm=l7zl5tzmkziaznyytd3gdsdd4zd2s2xthwzy3bgxsio4pw7u6zba._file

Verdict:

malicious

Label(s):

quasarrat

Similar samples:

error

QuasarRAT

Result

Malware family:

quasar

Score:

10/10

Tags:

family:quasar botnet:office04 spyware trojan

Link:

https://tria.ge/reports/250115-hpsdeawngk/

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:

193.161.193.99:20466

Verdict:

Malicious

Tags:

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

YARA:

malware_windows_quasarrat win_quasar_rat_client MAL_QuasarRAT_May19_1 MALWARE_Win_Quasarstealer

Link:

https://app.threat.zone/submission/9b95c3a1-d23e-4ab4-9297-97f6b1abb82d

Unpacked files

SH256 hash:

5ff2becf2c56500cb71898f661c863e647a96af33db38d84d7921dc7dbf4f642

MD5 hash:

ff8c68c60f122eb7f8473106d4bcf26c

SHA1 hash:

0efa03e7412e7e15868c93604372d2b2e6b80662

Detections:

QuasarRAT

Link:

https://www.unpac.me/results/70473c82-4020-4f30-a89b-0d430ed4567a/

Malware family:

QuasarRAT

Verdict:

Malicious

Link:

https://www.vmray.com/analyses/_mb/5ff2becf2c56/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/5ff2becf2c56500cb71898f661c863e647a96af33db38d84d7921dc7dbf4f642

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

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
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 Create hunting rule
Description:	Detects QuasarRAT malware

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:	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 5ff2becf2c56500cb71898f661c863e647a96af33db38d84d7921dc7dbf4f642

(this sample)

Delivery method

Distributed via web download

URLhaus

https://urlhaus.abuse.ch/url/3401366/

URLhaus

https://urlhaus.abuse.ch/url/3401392/

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 (HIGH_ENTROPY_VA)	high

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