MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 5a741ef4cb97d9e31e89328404474eed99f685cf60bb63dcf86e7be4e4e9e269. 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: 17

Intelligence 17 IOCs YARA 18 File information Comments

SHA256 hash:	5a741ef4cb97d9e31e89328404474eed99f685cf60bb63dcf86e7be4e4e9e269
SHA3-384 hash:	28ac4dfe1741a32ada128431317081f7f23804302461e54caac28b4a94aab091f1b0f4837e34c49e9cd3300f08e47515
SHA1 hash:	a84e1ce678534dee8f48c3fe1433420b17d3ac64
MD5 hash:	d001867ff938f296f1b03d98401833e4
humanhash:	ohio-september-failed-mobile
File name:	bJ11.exe
Download:	download sample
Signature	QuasarRAT Create hunting rule
File size:	356'352 bytes
First seen:	2023-02-06 14:07:23 UTC
Last seen:	Never
File type:	exe
MIME type:	application/x-dosexec
imphash	f34d5f2d4577ed6d9ceec516c1f5a744 (48'854 x AgentTesla, 19'783 x Formbook, 12'304 x SnakeKeylogger)
ssdeep	6144:v46bPXhLApfpTCahJqLhQPcbWhhyBPVu0BXi2:AmhApvhJHnhiVu0BS2
Threatray	476 similar samples on MalwareBazaar
TLSH	T191747C2373A4D93BD6FE173AF43206154BB0D987B616E38B5A5C46B86C133868E513B3
TrID	53.1% (.EXE) Generic CIL Executable (.NET, Mono, etc.) (73123/4/13) 12.0% (.EXE) Microsoft Visual C++ compiled executable (generic) (16529/12/5) 9.5% (.SCR) Windows screen saver (13097/50/3) 7.6% (.EXE) Win64 Executable (generic) (10523/12/4) 4.7% (.DLL) Win32 Dynamic Link Library (generic) (6578/25/2)
Reporter	pmelson
Tags:	exe QuasarRAT VoidRAT

Intelligence

File Origin

# of uploads :

# of downloads :

217

Origin country :

n/a

Vendor Threat Intelligence

Malware family:

quasar

ID:

File name:

bJ11.exe

Verdict:

Malicious activity

Analysis date:

2023-02-06 14:10:31 UTC

Tags:

rat quasar evasion trojan

Link:

https://app.any.run/tasks/94a70b02-7c1c-42b2-9178-91114357f4b4

Note:

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

Detection:

QuasarRAT

Link:

https://www.capesandbox.com/analysis/360898/

Detection(s):

Win.Packed.Generic-9829635-0

Win.Packed.Generic-9830106-0

Win.Trojan.Generic-6295765-0

Win.Malware.Generic-6623004-0

Result

Verdict:

Malware

Maliciousness:

Behaviour

Using the Windows Management Instrumentation requests

Сreating synchronization primitives

DNS request

Sending an HTTP GET request

Launching a process

Sending a custom TCP request

Setting a keyboard event handler

Creating a file in the %AppData% subdirectories

Creating a window

Enabling autorun with the standard Software\Microsoft\Windows\CurrentVersion\Run registry branch

Enabling autorun by creating a file

Verdict:

Malicious

Threat level:

10/10

Confidence:

100%

Tags:

anti-vm fingerprint keylogger packed quasar quasarrat rat shell32.dll stealer stealer vermin xrat

Link:

https://www.filescan.io/uploads/63e109c5447edb203a02ebdd/reports/1ce1304e-6c59-4b6d-b881-3e63cf36d316/overview

Verdict:

Malicious

Labled as:

MSIL.PasswordStealerA.Generic

Link:

https://www.hybrid-analysis.com/sample/5a741ef4cb97d9e31e89328404474eed99f685cf60bb63dcf86e7be4e4e9e269

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/f5adbfc0-c0f4-481f-a670-1ffbb759e77c

Result

Threat name:

Quasar

Detection:

malicious

Classification:

troj.spyw.evad

Score:

100 / 100

Link:

https://www.joesandbox.com/analysis/1166690

Signature

.NET source code references suspicious native API functions

Antivirus / Scanner detection for submitted sample

C2 URLs / IPs found in malware configuration

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

Installs a global keyboard hook

Machine Learning detection for sample

Malicious sample detected (through community Yara rule)

May check the online IP address of the machine

Multi AV Scanner detection for submitted file

Queries sensitive BIOS Information (via WMI, Win32_Bios & Win32_BaseBoard, often done to detect virtual machines)

Snort IDS alert for network traffic

Uses dynamic DNS services

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

Detection:

quasar

Link:

https://mwdb.cert.pl/sample/5a741ef4cb97d9e31e89328404474eed99f685cf60bb63dcf86e7be4e4e9e269/

Threat name:

ByteCode-MSIL.Trojan.Quasar

Status:

Malicious

First seen:

2023-02-06 14:08:08 UTC

File Type:

PE (.Net Exe)

Extracted files:

AV detection:

25 of 26 (96.15%)

Threat level:

5/5

Detection(s):

Suspicious file

Link:

https://check.spamhaus.org/check/?searchterm=lj2b55gls7m6ghujgkcair2o5wm7nbopmc5whxhynz56jzhj4juq._file

Verdict:

malicious

QuasarRAT

6b1563cac0c603f4b9e1b1cd00ef8e01d16252d88689fba30c31b26121ac6772

QuasarRAT

9766f8a3e27f1e7373beedc2a418dc37931479af03eb239aff3ba563f41ddaf6

QuasarRAT

9e2504ae76b162ef7eee19d01cb5892510d8f27732e93ac4a7e91b1b16ba18c9

QuasarRAT

aacfd54183f4afdf0982230069833b23e78a64d0e7748a4a07afa039d8741290

QuasarRAT

b85d366a889518edf0a9899e2120de042965a72fc60c8795a2f9bd6eee96d58c

QuasarRAT

c0393c1c87a785bc946286f6053de656560728aec5e9f97a8eddf12ee0f4b8a4

QuasarRAT

+ 466 additional samples on MalwareBazaar

Result

Malware family:

quasar

Score:

10/10

Tags:

family:quasar botnet:xxxxxxxrc spyware trojan

Link:

https://tria.ge/reports/230206-rfk3eaec28/

Behaviour

Creates scheduled task(s)

Suspicious use of AdjustPrivilegeToken

Suspicious use of SetWindowsHookEx

Suspicious use of WriteProcessMemory

Looks up external IP address via web service

Quasar RAT

Quasar payload

Malware Config

C2 Extraction:

qsar1928.duckdns.org:2158

Unpacked files

SH256 hash:

5a741ef4cb97d9e31e89328404474eed99f685cf60bb63dcf86e7be4e4e9e269

MD5 hash:

d001867ff938f296f1b03d98401833e4

SHA1 hash:

a84e1ce678534dee8f48c3fe1433420b17d3ac64

Link:

https://www.unpac.me/results/efb044a4-0f10-4d6b-925a-d2e54ab0bd8e/

Malware family:

xRAT

Verdict:

Malicious

Link:

https://www.vmray.com/analyses/_mb/5a741ef4cb97/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/5a741ef4cb97d9e31e89328404474eed99f685cf60bb63dcf86e7be4e4e9e269

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

Rule name:	pe_imphash Create hunting rule

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
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:	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 5a741ef4cb97d9e31e89328404474eed99f685cf60bb63dcf86e7be4e4e9e269

(this sample)

Link

https://www.virustotal.com/gui/file/5a741ef4cb97d9e31e89328404474eed99f685cf60bb63dcf86e7be4e4e9e269/detection

Delivery method

Distributed via web download

Cape

https://www.capesandbox.com/analysis/360898/

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