MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 a39273f1d1194875d532810da2f842c3927f5f853f5f749c0aa040519678057e. 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 20 File information Comments

SHA256 hash:	a39273f1d1194875d532810da2f842c3927f5f853f5f749c0aa040519678057e
SHA3-384 hash:	a8e1e9d55b18ee5f9176244ad950bfbf4b4a9a784bb48c67148b4f02cda9d98bcbda26ccb8dc112d0107b88fe1dc0f0d
SHA1 hash:	339cfc2ee60247bf8127b90bc5d285eb44cd51d4
MD5 hash:	cb83f8f89ba1ddb971f451d0f2d9c2ad
humanhash:	fish-pizza-salami-cup
File name:	CB83F8F89BA1DDB971F451D0F2D9C2AD.exe
Download:	download sample
Signature	QuasarRAT Create hunting rule
File size:	3'266'048 bytes
First seen:	2024-03-24 03:20:42 UTC
Last seen:	Never
File type:	exe
MIME type:	application/x-dosexec
imphash	f34d5f2d4577ed6d9ceec516c1f5a744 (48'661 x AgentTesla, 19'474 x Formbook, 12'208 x SnakeKeylogger)
ssdeep	49152:Lvjz92YpaQI6oPZlhP3ReybewowCO1J9LoGdkWwTHHB72eh2NT:LvX92YpaQI6oPZlhP3YybewowCsU
Threatray	576 similar samples on MalwareBazaar
TLSH	T1CEE54A1437F85E23E1BBE273D5B0041267F1EC2AB363FB5B6181677A1C93B505841AAB
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	abuse_ch
Tags:	exe QuasarRAT RAT

abuse_ch

QuasarRAT C2:
175.42.16.2:4784

Intelligence

File Origin

# of uploads :

# of downloads :

518

Origin country :

Vendor Threat Intelligence

Malware family:

quasar

ID:

File name:

a39273f1d1194875d532810da2f842c3927f5f853f5f749c0aa040519678057e.exe

Verdict:

Malicious activity

Analysis date:

2024-03-24 03:21:02 UTC

Tags:

quasar

Link:

https://app.any.run/tasks/fbeefdea-0dea-4a12-bde9-679a8440f352

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

Creating a file in the system32 subdirectories

Launching a process

Enabling autorun by creating a file

Verdict:

Malicious

Threat level:

10/10

Confidence:

100%

Tags:

anti-vm certreq crypto expand explorer hook infostealer keylogger lolbin quasarrat rat remote schtasks stealer stealer

Link:

https://www.filescan.io/uploads/65ff9c207e414bfaaebf30f2/reports/a23e799b-e120-4bf8-b132-9517710083db/overview

Verdict:

Malicious

Labled as:

Trojan.MSIL.Quasar

Link:

https://www.hybrid-analysis.com/sample/a39273f1d1194875d532810da2f842c3927f5f853f5f749c0aa040519678057e

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/ff4f6360-17aa-4728-b50a-9cbeba9c6d82

Result

Threat name:

Quasar

Detection:

malicious

Classification:

troj.spyw.evad

Score:

100 / 100

Link:

https://www.joesandbox.com/analysis/1414623

Signature

Antivirus / Scanner detection for submitted sample

Antivirus detection for dropped file

C2 URLs / IPs found in malware configuration

Drops executables to the windows directory (C:\Windows) and starts them

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: Quasar

Snort IDS alert for network traffic

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:

98%

Verdict:

Malware

File Type:

Link:

https://malprob.io/report/a39273f1d1194875d532810da2f842c3927f5f853f5f749c0aa040519678057e

Detection:

quasar

Link:

https://mwdb.cert.pl/sample/a39273f1d1194875d532810da2f842c3927f5f853f5f749c0aa040519678057e/

Threat name:

ByteCode-MSIL.Trojan.Quasar

Status:

Malicious

First seen:

2024-03-20 12:53:00 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=uojhh4ordfehlvjsqeg2f6ccyojh6x4fh5pxjhakubafdftyav7a._file

Verdict:

malicious

QuasarRAT

3ad07a1878c8b77f9fc0143d8f88c240d8d0b986d015d4c0cd881ad9c0d572e1

QuasarRAT

9eefa45ebc884b3b6fa4349d140963700c9f2c2543840d965b11c7f815346ab9

QuasarRAT

ced760664a7c5580e324d99d695b119c1f3ec94d1d9c56d1d3882347f0c6eb10

QuasarRAT

eddd85fd74df2ee82c700de8e49284a5043d3e69913c97e66385abcbab75bf49

QuasarRAT

+ 566 additional samples on MalwareBazaar

Result

Malware family:

quasar

Score:

10/10

Tags:

family:quasar botnet:#9e302 高二五班 spyware trojan

Link:

https://tria.ge/reports/240324-dwbl1sbf7x/

Behaviour

Creates scheduled task(s)

Suspicious use of AdjustPrivilegeToken

Suspicious use of SetWindowsHookEx

Suspicious use of WriteProcessMemory

Uses Task Scheduler COM API

Drops file in System32 directory

Executes dropped EXE

Quasar RAT

Quasar payload

Malware Config

C2 Extraction:

fallempire.tpddns.cn:4784
beaker.top:4784
1433223.duckdns.org:4784

Unpacked files

SH256 hash:

a39273f1d1194875d532810da2f842c3927f5f853f5f749c0aa040519678057e

MD5 hash:

cb83f8f89ba1ddb971f451d0f2d9c2ad

SHA1 hash:

339cfc2ee60247bf8127b90bc5d285eb44cd51d4

Detections:

QuasarRAT

malware_windows_xrat_quasarrat

win_quasarrat_j2

MALWARE_Win_QuasarStealer

cn_utf8_windows_terminal

INDICATOR_SUSPICIOUS_EXE_NoneWindowsUA

MAL_QuasarRAT_May19_1

INDICATOR_SUSPICIOUS_Binary_References_Browsers

INDICATOR_SUSPICIOUS_GENInfoStealer

Link:

https://www.unpac.me/results/c6431d8e-b8aa-436c-b0ab-9f875fbb6d44/

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/a39273f1d1194875d532810da2f842c3927f5f853f5f749c0aa040519678057e

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:	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.

No further information available

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

Login required

You need to login to in order to write a comment. Login with your abuse.ch account.

No comments found for this malware sample