MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 a2b66f9f80d2add5e7b13f9e75b6c964e53d7aa2e52065b469b83f7e7c31fa7c. 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: 16

Intelligence 16 IOCs YARA 21 File information Comments 1

SHA256 hash:	a2b66f9f80d2add5e7b13f9e75b6c964e53d7aa2e52065b469b83f7e7c31fa7c
SHA3-384 hash:	64aa34927245e3fc85735b04b4017916f0343e6c912f4ffbec4439aa1010194e7493e8b06df9e300e57cabaa5ac83bc3
SHA1 hash:	6a9b6335b9f091e0480fc7167b4d7304677ce08b
MD5 hash:	e0537c132607a98cb4133bb066a74db2
humanhash:	solar-network-berlin-hawaii
File name:	e0537c132607a98cb4133bb066a74db2
Download:	download sample
Signature	QuasarRAT Create hunting rule
File size:	3'265'536 bytes
First seen:	2024-04-28 07:17:21 UTC
Last seen:	Never
File type:	exe
MIME type:	application/x-dosexec
imphash	f34d5f2d4577ed6d9ceec516c1f5a744 (48'657 x AgentTesla, 19'468 x Formbook, 12'207 x SnakeKeylogger)
ssdeep	49152:6vxt62XlaSFNWPjljiFa2RoUYIaPRJ6LbR3LoGdATHHB72eh2NT:6v762XlaSFNWPjljiFXRoUYIaPRJ6d
Threatray	624 similar samples on MalwareBazaar
TLSH	T1B1E56B143BF85E27E1BBE277E5B0041267F0FC1AB363EB0B6581677A1C53B5098426A7
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	zbetcheckin
Tags:	32 exe QuasarRAT

Intelligence

File Origin

# of uploads :

# of downloads :

364

Origin country :

Vendor Threat Intelligence

Malware family:

quasar

ID:

File name:

a2b66f9f80d2add5e7b13f9e75b6c964e53d7aa2e52065b469b83f7e7c31fa7c.exe

Verdict:

Malicious activity

Analysis date:

2024-04-28 07:18:00 UTC

Tags:

quasar

Link:

https://app.any.run/tasks/03039f0c-8657-4ee2-8d01-d9fb630d1eb1

Note:

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

Result

Verdict:

Malware

Maliciousness:

Behaviour

Creating a window

Сreating synchronization primitives

Launching a process

Setting a keyboard event handler

Connection attempt

Enabling autorun by creating a file

Verdict:

Malicious

Labled as:

Malware

Link:

https://www.hybrid-analysis.com/sample/a2b66f9f80d2add5e7b13f9e75b6c964e53d7aa2e52065b469b83f7e7c31fa7c

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/1bbfde5a-cdb9-4a11-80a2-1166187946b6

Result

Threat name:

Quasar

Detection:

malicious

Classification:

troj.spyw.evad

Score:

100 / 100

Link:

https://www.joesandbox.com/analysis/1432788

Signature

Antivirus / Scanner detection for submitted sample

C2 URLs / IPs found in malware configuration

Found malware configuration

Found potential dummy code loops (likely to delay analysis)

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)

Multi AV Scanner detection for submitted file

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:

99%

Verdict:

Malware

File Type:

Link:

https://malprob.io/report/a2b66f9f80d2add5e7b13f9e75b6c964e53d7aa2e52065b469b83f7e7c31fa7c

Detection:

quasar

Link:

https://mwdb.cert.pl/sample/a2b66f9f80d2add5e7b13f9e75b6c964e53d7aa2e52065b469b83f7e7c31fa7c/

Threat name:

ByteCode-MSIL.Trojan.Quasar

Status:

Malicious

First seen:

2024-04-23 14:53:14 UTC

File Type:

PE (.Net Exe)

Extracted files:

AV detection:

21 of 24 (87.50%)

Threat level:

5/5

Detection(s):

Suspicious file

Link:

https://check.spamhaus.org/check/?searchterm=uk3g7h4a2kw5lz5rh6phlnwjmtst26vc4uqglndjxa7x47br7j6a._file

Verdict:

malicious

QuasarRAT

3ad07a1878c8b77f9fc0143d8f88c240d8d0b986d015d4c0cd881ad9c0d572e1

QuasarRAT

9eefa45ebc884b3b6fa4349d140963700c9f2c2543840d965b11c7f815346ab9

QuasarRAT

ced760664a7c5580e324d99d695b119c1f3ec94d1d9c56d1d3882347f0c6eb10

QuasarRAT

eddd85fd74df2ee82c700de8e49284a5043d3e69913c97e66385abcbab75bf49

QuasarRAT

+ 614 additional samples on MalwareBazaar

Result

Malware family:

quasar

Score:

10/10

Tags:

family:quasar botnet:office04 spyware trojan

Link:

https://tria.ge/reports/240428-h4x77sag24/

Behaviour

Creates scheduled task(s)

Suspicious use of AdjustPrivilegeToken

Suspicious use of SetWindowsHookEx

Suspicious use of WriteProcessMemory

Uses Task Scheduler COM API

Quasar RAT

Quasar payload

Malware Config

C2 Extraction:

192.168.10.193:4455

Unpacked files

SH256 hash:

a2b66f9f80d2add5e7b13f9e75b6c964e53d7aa2e52065b469b83f7e7c31fa7c

MD5 hash:

e0537c132607a98cb4133bb066a74db2

SHA1 hash:

6a9b6335b9f091e0480fc7167b4d7304677ce08b

Detections:

QuasarRAT

Link:

https://www.unpac.me/results/6ae3e791-b76a-4fcc-83aa-d6d38527a961/

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/a2b66f9f80d2add5e7b13f9e75b6c964e53d7aa2e52065b469b83f7e7c31fa7c

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

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:	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:	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 a2b66f9f80d2add5e7b13f9e75b6c964e53d7aa2e52065b469b83f7e7c31fa7c

(this sample)

Delivery method

Distributed via web download

URLhaus

https://urlhaus.abuse.ch/url/2829866/

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

Comments

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zbet commented on 2024-04-28 07:17:22 UTC

url : hxxp://fluggis.com/QuasarLanTest.exe