MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 0901494ca99f6080fd12276cf98de5689cd4e0da9c797954d6d832492ac21e81. 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
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 0901494ca99f6080fd12276cf98de5689cd4e0da9c797954d6d832492ac21e81
SHA3-384 hash: 39e1eaac63710360f9347c942f4400828de2af264426ca8234679c9e6f35bd518708ba7d396531f48738c814760c8ad8
SHA1 hash: ca6ce16a85d71e0ac5cdb3f0ea3a919e24148455
MD5 hash: 3fdcf1d40c4de6112ff039fbb2f1ba02
humanhash: tennessee-high-robert-alanine
File name:default.exe
Download: download sample
Signature QuasarRAT
Create hunting rule
File size:1'623'552 bytes
First seen:2025-04-27 20:45:00 UTC
Last seen:2025-04-27 20:52:08 UTC
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'661 x AgentTesla, 19'474 x Formbook, 12'208 x SnakeKeylogger)
ssdeep 24576:H1HzMFIgS2eWBRwRR16zhHIPbcNK0KKm77yviUSQaZaOwI55l2S62r9lsJtn19:HdMj7wR2EgKKm77LrwCB6A
Threatray 13 similar samples on MalwareBazaar
TLSH T12775F010B3F98207F5BF5FBCA9B755491B33B5069A3AC74E498C44AC2EA33409E51B63
TrID 58.7% (.EXE) Generic CIL Executable (.NET, Mono, etc.) (73123/4/13)
13.2% (.EXE) Microsoft Visual C++ compiled executable (generic) (16529/12/5)
8.4% (.EXE) Win64 Executable (generic) (10522/11/4)
5.2% (.DLL) Win32 Dynamic Link Library (generic) (6578/25/2)
4.0% (.EXE) Win16 NE executable (generic) (5038/12/1)
Magika pebin
Reporter LuRisa323
Tags:exe QuasarRAT

Intelligence

File Origin
# of uploads :
2
# of downloads :
426
Origin country :
CA CA
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
default.exe
Verdict:
Malicious activity
Analysis date:
2025-04-27 19:11:41 UTC
Tags:
evasion crypto-regex
Link:
https://app.any.run/tasks/c1735314-fe5b-4469-bb9a-02a80645c1cf

Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Detection:
n/a
Link:
https://www.capesandbox.com/analysis/4424/
Detection(s):
Win.Malware.Generic-9883083-0
Create hunting rule

Win.Malware.Bulz-9933026-0
Create hunting rule

ditekSHen.MALWARE.Win.Trojan.QuasarStealer.UNOFFICIAL
Create hunting rule

Win.Malware.Generic-6623004-0
Create hunting rule

Verdict:
Malicious
Score:
99.9%
Link:
https://cyber-fortress.com/docs/result/index.php?id=680e9d4bc8b2e86d0ac3618c
Tags:
vmdetect 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
Threat level:
  10/10
Confidence:
100%
Tags:
anti-vm anti-vm backnet cmd cscript entropy explorer fingerprint hacktool lolbin mshta netsh obfuscated packed packed packer_detected quasarrat rat reconnaissance remote runonce schtasks update
Link:
https://www.filescan.io/uploads/680e976e46fe05453ca82c88/reports/fa189b3a-63cb-4609-9150-67547bb41fd1/overview
Verdict:
Malicious
Labled as:
IL:Trojan.MSILZilla
Link:
https://www.hybrid-analysis.com/sample/0901494ca99f6080fd12276cf98de5689cd4e0da9c797954d6d832492ac21e81
Verdict:
Malicious
Link:
https://analyze.intezer.com/analyses/eb1faafd-be5f-454d-b1b5-2350147d06a8
Result
Threat name:
AsyncRAT, Njrat, Quasar
Create hunting rule
Detection:
malicious
Classification:
troj.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1675637
Signature
.NET source code contains potential unpacker
Antivirus detection for dropped file
Antivirus detection for URL or domain
Found malware configuration
Hides that the sample has been downloaded from the Internet (zone.identifier)
Joe Sandbox ML detected suspicious sample
Malicious sample detected (through community Yara rule)
Multi AV Scanner detection for dropped file
Multi AV Scanner detection for submitted file
Sample uses string decryption to hide its real strings
Sigma detected: Potentially Suspicious Malware Callback Communication
Tries to detect sandboxes and other dynamic analysis tools (process name or module or function)
Uses schtasks.exe or at.exe to add and modify task schedules
Yara detected AsyncRAT
Yara detected Njrat
Yara detected Quasar RAT
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 1675637 Sample: default.exe Startdate: 27/04/2025 Architecture: WINDOWS Score: 100 40 ipwho.is 2->40 50 Found malware configuration 2->50 52 Malicious sample detected (through community Yara rule) 2->52 54 Antivirus detection for URL or domain 2->54 56 11 other signatures 2->56 9 default.exe 4 2->9         started        13 default.exe 2 2->13         started        signatures3 process4 file5 36 C:\Users\user\AppData\Roaming\...\default.exe, PE32 9->36 dropped 38 C:\Users\user\AppData\...\default.exe.log, CSV 9->38 dropped 58 Uses schtasks.exe or at.exe to add and modify task schedules 9->58 60 Hides that the sample has been downloaded from the Internet (zone.identifier) 9->60 15 default.exe 14 9 9->15         started        20 schtasks.exe 1 9->20         started        signatures6 process7 dnsIp8 42 193.151.108.40, 4444, 49682 SILVERCOMRU-ASRU Russian Federation 15->42 44 ipwho.is 108.181.47.111, 443, 49684 ASN852CA Canada 15->44 28 C:\Users\user\AppData\...\ShIFoFD8TP3k.exe, PE32 15->28 dropped 30 C:\Users\user\AppData\...\QclIxkAxZZ94.exe, PE32 15->30 dropped 32 C:\Users\user\AppData\...\Iz1O6P9JRJWo.exe, PE32 15->32 dropped 34 4 other malicious files 15->34 dropped 46 Multi AV Scanner detection for dropped file 15->46 48 Hides that the sample has been downloaded from the Internet (zone.identifier) 15->48 22 schtasks.exe 1 15->22         started        24 conhost.exe 20->24         started        file9 signatures10 process11 process12 26 conhost.exe 22->26         started       
Score:
96%
Verdict:
Malware
File Type:
PE
Link:
https://malprob.io/report/0901494ca99f6080fd12276cf98de5689cd4e0da9c797954d6d832492ac21e81
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/0901494ca99f6080fd12276cf98de5689cd4e0da9c797954d6d832492ac21e81/
Threat name:
ByteCode-MSIL.Hacktool.Aikaantivm
Create hunting rule
Status:
Malicious
First seen:
2025-04-27 01:12:39 UTC
File Type:
PE (.Net Exe)
Extracted files:
3
AV detection:
22 of 24 (91.67%)
Threat level:
  1/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=beaustfjt5qib7ise5wptdpfnconjyg2tr4xsvgw3azeskwcd2aq._file
Verdict:
malicious
Label(s):
quasarrat
Create hunting rule
Similar samples:
0901494ca99f6080fd12276cf98de5689cd4e0da9c797954d6d832492ac21e81
QuasarRAT
0d83301aae4af98108f42ccbc7d9b4e3abcd65c91162fc0bfa8d4e3c86733560
QuasarRAT
101786e62aeb6f62129bb39ea1b58cc587de9483a2409a1c95a61a32aa202627
QuasarRAT
197ebb16ffd123604a2f960d4bd32d7e2756253ac728a218b18ef42857fe9d95
QuasarRAT
4a6389fb42a4918ca6b7aec6c86a4e945f85dfb6490f873f9be24fa5c7f9df06
QuasarRAT
9299eddf62904e0b0c32dca0aa811bd686b3d2a0f3c942617b2c5f9c725e110c
QuasarRAT
error
QuasarRAT
+ 3 additional samples on MalwareBazaar
Result
Malware family:
quasar
Create hunting rule
Score:
  10/10
Tags:
family:quasar botnet:scaner_new spyware trojan
Link:
https://tria.ge/reports/250427-zj1ahasny7/
Behaviour
Modifies system certificate store
Scheduled Task/Job: Scheduled Task
Suspicious behavior: AddClipboardFormatListener
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
Uses Task Scheduler COM API
Executes dropped EXE
Quasar RAT
Quasar family
Quasar payload
Malware Config
C2 Extraction:
193.151.108.40:4444
Verdict:
Malicious
Tags:
red_team_tool backdoor backnet rat quasar_rat Win.Malware.Generic-9883083-0
YARA:
HKTL_EXE_AlKhaser_Jul_01 MAL_BackNet_Nov18_1 malware_windows_quasarrat MAL_QuasarRAT_May19_1
Link:
https://app.threat.zone/submission/8406c84e-593a-4400-80cd-96ca4fe99c01
Unpacked files
SH256 hash:
0901494ca99f6080fd12276cf98de5689cd4e0da9c797954d6d832492ac21e81
MD5 hash:
3fdcf1d40c4de6112ff039fbb2f1ba02
SHA1 hash:
ca6ce16a85d71e0ac5cdb3f0ea3a919e24148455
Detections:
QuasarRAT
Create hunting rule
Link:
https://www.unpac.me/results/cc720a57-ad42-41de-9890-bed74c2f7ec3/
Malware family:
QuasarRAT
Create hunting rule
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/0901494ca99f/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/0901494ca99f6080fd12276cf98de5689cd4e0da9c797954d6d832492ac21e81

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:Check_Dlls
Create hunting rule
Rule name:Costura_Protobuf
Create hunting rule
Author:@bartblaze
Description:Identifies Costura and Protobuf in .NET assemblies, respectively for storing resources and (de)serialization. Seen together might indicate a suspect binary.
Rule name:DebuggerCheck__API
Create hunting rule
Reference:https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara
Rule name:DebuggerCheck__QueryInfo
Create hunting rule
Reference:https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara
Rule name:DebuggerHiding__Thread
Create hunting rule
Reference:https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara
Rule name:Detect_PowerShell_Obfuscation
Create hunting rule
Author:daniyyell
Description:Detects obfuscated PowerShell commands commonly used in malicious scripts.
Rule name:INDICATOR_EXE_Packed_Fody
Create hunting rule
Author:ditekSHen
Description:Detects executables manipulated with Fody
Rule name:INDICATOR_SUSPICIOUS_EXE_NoneWindowsUA
Create hunting rule
Author:ditekSHen
Description:Detects Windows executables referencing non-Windows User-Agents
Rule name:INDICATOR_SUSPICIOUS_EXE_SandboxHookingDLL
Create hunting rule
Author:ditekSHen
Description:Detects binaries and memory artifacts referencing sandbox DLLs typically observed in sandbox evasion
Rule name:MAL_BackNet_Nov18_1
Create hunting rule
Author:Florian Roth (Nextron Systems)
Description:Detects BackNet samples
Reference:https://github.com/valsov/BackNet
Rule name:MAL_BackNet_Nov18_1_RID2D6D
Create hunting rule
Author:Florian Roth
Description:Detects BackNet samples
Reference:https://github.com/valsov/BackNet
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:NETexecutableMicrosoft
Create hunting rule
Author:malware-lu
Rule name:pe_imphash
Create hunting rule
Rule name:RANSOMWARE
Create hunting rule
Author:ToroGuitar
Rule name:Skystars_Malware_Imphash
Create hunting rule
Author:Skystars LightDefender
Description:imphash
Rule name:Sus_Obf_Enc_Spoof_Hide_PE
Create hunting rule
Author:XiAnzheng
Description:Check for Overlay, Obfuscating, Encrypting, Spoofing, Hiding, or Entropy Technique(can create FP)

File information

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

Cape
Cape
https://www.capesandbox.com/analysis/4424/

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
IDTitleSeverity
CHECK_AUTHENTICODEMissing Authenticodehigh
CHECK_DLL_CHARACTERISTICSMissing dll Security Characteristics (GUARD_CF)high

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