MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 fbc526c8f283b181391aa13ca98e82a99859aeef3f0fb7ef7a0ed155392663b4. 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 24 File information Comments

SHA256 hash:	fbc526c8f283b181391aa13ca98e82a99859aeef3f0fb7ef7a0ed155392663b4
SHA3-384 hash:	223c4ff488c5dd757a9f7ebb871aa177e0a1d662f944fe493844c4fd0052cba77a047c78c99f3ca329e4266ad786b2f4
SHA1 hash:	f461a01547e439e83ae02a4ca8da6a7c2efa753a
MD5 hash:	9d7f799067e3a1bf3596c7b693e912a3
humanhash:	monkey-potato-uranus-east
File name:	xUPyFH4lXPsU.exe
Download:	download sample
Signature	QuasarRAT Create hunting rule
File size:	356'352 bytes
First seen:	2024-04-05 22:34:25 UTC
Last seen:	Never
File type:	exe
MIME type:	application/x-dosexec
imphash	f34d5f2d4577ed6d9ceec516c1f5a744 (48'672 x AgentTesla, 19'489 x Formbook, 12'212 x SnakeKeylogger)
ssdeep	6144:77qQ4i1FFiEKLJ5aMEb2lEyg77CukNnEwTWhFF+:npliN5jC77Cu3wTM+
TLSH	T158749D5773A8D53BD1FE073AE43246144BB0D843B627F38B5A2C56B96D223868D523B3
TrID	37.4% (.EXE) Generic CIL Executable (.NET, Mono, etc.) (73123/4/13) 29.5% (.CPL) Windows Control Panel Item (generic) (57583/11/19) 8.4% (.EXE) Microsoft Visual C++ compiled executable (generic) (16529/12/5) 6.7% (.SCR) Windows screen saver (13097/50/3) 5.3% (.EXE) Win64 Executable (generic) (10523/12/4)
Reporter	pmelson
Tags:	exe QuasarRAT VoidRAT

Intelligence

File Origin

# of uploads :

# of downloads :

501

Origin country :

Vendor Threat Intelligence

Malware family:

quasar

ID:

File name:

fbc526c8f283b181391aa13ca98e82a99859aeef3f0fb7ef7a0ed155392663b4.exe

Verdict:

Malicious activity

Analysis date:

2024-04-05 22:34:49 UTC

Tags:

rat quasar evasion remote

Link:

https://app.any.run/tasks/54f7883a-a92b-461a-a86f-ea0a91be01f9

Note:

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

Result

Verdict:

Malware

Maliciousness:

Behaviour

Using the Windows Management Instrumentation requests

Сreating synchronization primitives

DNS request

Connection attempt

Sending an HTTP GET request

Creating a window

Verdict:

Malicious

Threat level:

10/10

Confidence:

100%

Tags:

anti-vm crypto fingerprint hook infostealer keylogger lolbin quasar quasarrat rat schtasks shell32 stealer stealer vermin xrat

Link:

https://www.filescan.io/uploads/66107c98aeca3665d3b67926/reports/54a2280b-1f6c-4199-b810-02a69b548938/overview

Verdict:

Malicious

Labled as:

MSIL.PasswordStealerA.Generic

Link:

https://www.hybrid-analysis.com/sample/fbc526c8f283b181391aa13ca98e82a99859aeef3f0fb7ef7a0ed155392663b4

Result

Verdict:

MALICIOUS

Details

Windows PE Executable

Found a Windows Portable Executable (PE) binary. Depending on context, the presence of a binary is suspicious or malicious.

Malware family:

Quasar RAT

Verdict:

Malicious

Link:

https://analyze.intezer.com/analyses/a1dab480-16ea-4518-8b8e-82decf152acf

Result

Threat name:

Quasar

Detection:

malicious

Classification:

troj.evad

Score:

100 / 100

Link:

https://www.joesandbox.com/analysis/1421195

Signature

Antivirus / Scanner detection for submitted sample

C2 URLs / IPs found in malware configuration

Detected Quasar RAT

Found malware configuration

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

Machine Learning detection for sample

Malicious sample detected (through community Yara rule)

Multi AV Scanner detection for submitted file

Snort IDS alert for network traffic

Uses dynamic DNS services

Yara detected Generic Downloader

Yara detected Quasar RAT

Behaviour

Behavior Graph:

Download SVG

Score:

100%

Verdict:

Malware

File Type:

Link:

https://malprob.io/report/fbc526c8f283b181391aa13ca98e82a99859aeef3f0fb7ef7a0ed155392663b4

Detection:

quasar

Link:

https://mwdb.cert.pl/sample/fbc526c8f283b181391aa13ca98e82a99859aeef3f0fb7ef7a0ed155392663b4/

Threat name:

ByteCode-MSIL.Trojan.Quasar

Status:

Malicious

First seen:

2024-04-05 22:35:08 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=7pcsnshsqoyycoi2ue6ktducvgmftlxph4h3p332b3ivkojgmo2a._file

Verdict:

malicious

Result

Malware family:

quasar

Score:

10/10

Tags:

family:quasar botnet:office04 spyware trojan

Link:

https://tria.ge/reports/240405-2hnanaeg77/

Behaviour

Suspicious use of AdjustPrivilegeToken

Looks up external IP address via web service

Quasar RAT

Quasar payload

Malware Config

C2 Extraction:

promesasalvaro1.duckdns.org:4782

Unpacked files

SH256 hash:

fbc526c8f283b181391aa13ca98e82a99859aeef3f0fb7ef7a0ed155392663b4

MD5 hash:

9d7f799067e3a1bf3596c7b693e912a3

SHA1 hash:

f461a01547e439e83ae02a4ca8da6a7c2efa753a

Detections:

QuasarRAT

malware_windows_xrat_quasarrat

CN_disclosed_20180208_KeyLogger_1

cn_utf8_windows_terminal

INDICATOR_SUSPICIOUS_EXE_NoneWindowsUA

Quasar_RAT_2

Quasar

Vermin_Keylogger_Jan18_1

MAL_QuasarRAT_May19_1

MALWARE_Win_QuasarRAT

INDICATOR_SUSPICIOUS_GENInfoStealer

Quasar_RAT_1

xRAT_1

win_quasarrat_j1

Link:

https://www.unpac.me/results/410ba505-9e9d-4778-912a-446afbb9dc32/

Malware family:

QuasarRAT

Verdict:

Malicious

Link:

https://www.vmray.com/analyses/_mb/fbc526c8f283/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/fbc526c8f283b181391aa13ca98e82a99859aeef3f0fb7ef7a0ed155392663b4

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:	CN_disclosed_20180208_KeyLogger_1 Create hunting rule
Author:	Florian Roth (Nextron Systems)
Description:	Detects malware from disclosed CN malware set
Reference:	https://www.virustotal.com/graph/#/selected/n120z79z208z189/drawer/graph-details

Rule name:	CN_disclosed_20180208_KeyLogger_1_RID3227 Create hunting rule
Author:	Florian Roth
Description:	Detects malware from disclosed CN malware set
Reference:	https://www.virustotal.com/graph/#/selected/n120z79z208z189/drawer/graph-details

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:	malware_Quasar_strings Create hunting rule
Author:	JPCERT/CC Incident Response Group
Description:	detect QuasarRAT in memory

Rule name:	MALWARE_Win_QuasarRAT Create hunting rule
Author:	ditekSHen
Description:	QuasarRAT payload

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:	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:	Quasar_RAT_1 Create hunting rule
Author:	@SOCRadar
Description:	Detects Quasar RAT

Rule name:	Quasar_RAT_1 Create hunting rule
Author:	Florian Roth (Nextron Systems)
Description:	Detects Quasar RAT
Reference:	https://www.pwc.co.uk/cyber-security/pdf/cloud-hopper-annex-b-final.pdf

Rule name:	Quasar_RAT_1_RID2B54 Create hunting rule
Author:	Florian Roth
Description:	Detects Quasar RAT
Reference:	https://www.pwc.co.uk/cyber-security/pdf/cloud-hopper-annex-b-final.pdf

Rule name:	Quasar_RAT_2 Create hunting rule
Description:	Detects Quasar RAT

Rule name:	Quasar_RAT_2 Create hunting rule
Author:	Florian Roth (Nextron Systems)
Description:	Detects Quasar RAT
Reference:	https://www.pwc.co.uk/cyber-security/pdf/cloud-hopper-annex-b-final.pdf

Rule name:	Quasar_RAT_2_RID2B55 Create hunting rule
Author:	Florian Roth
Description:	Detects Quasar RAT
Reference:	https://www.pwc.co.uk/cyber-security/pdf/cloud-hopper-annex-b-final.pdf

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

Rule name:	Vermin_Keylogger_Jan18_1 Create hunting rule
Author:	Florian Roth (Nextron Systems)
Description:	Detects Vermin Keylogger
Reference:	https://researchcenter.paloaltonetworks.com/2018/01/unit42-vermin-quasar-rat-custom-malware-used-ukraine/

Rule name:	Windows_Trojan_Quasarrat_e52df647 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.

Rule name:	xRAT_1 Create hunting rule
Author:	Florian Roth (Nextron Systems)
Description:	Detects Patchwork malware
Reference:	https://goo.gl/Pg3P4W

Rule name:	xRAT_1_RID2900 Create hunting rule
Author:	Florian Roth
Description:	Detects Patchwork malware
Reference:	https://goo.gl/Pg3P4W

File information

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

Web download

QuasarRAT

exe fbc526c8f283b181391aa13ca98e82a99859aeef3f0fb7ef7a0ed155392663b4

(this sample)

Link

https://www.virustotal.com/gui/file/fbc526c8f283b181391aa13ca98e82a99859aeef3f0fb7ef7a0ed155392663b4/detection

Delivery method

Distributed via web download

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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