MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 77244092e7dd606f04a3f38af9050f91e6cd78989526e56440a8fa3f5ece758f. 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 25 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 77244092e7dd606f04a3f38af9050f91e6cd78989526e56440a8fa3f5ece758f
SHA3-384 hash: c11379f7d9dccd734eeb74340b6e7a020a326e695c3c31063c5d6f1c3151da7be6a83589afb5f15dc52a70adcb49f4d5
SHA1 hash: ac5b97def6b237c077c7cbb26a44b813cd40dfbd
MD5 hash: 8f5bd87ff24f2310b9c803b764fdae24
humanhash: purple-romeo-wolfram-five
File name:Client-built.exe
Download: download sample
Signature QuasarRAT
Create hunting rule
File size:3'265'536 bytes
First seen:2024-12-16 06:29:21 UTC
Last seen:2025-01-03 11:38:12 UTC
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (49'116 x AgentTesla, 20'118 x Formbook, 12'358 x SnakeKeylogger)
ssdeep 49152:Cvkt62XlaSFNWPjljiFa2RoUYIr4mWmzuLoGdNVaTHHB72eh2NT:Cv462XlaSFNWPjljiFXRoUYIr4msd
Threatray 964 similar samples on MalwareBazaar
TLSH T12FE55A0577F85E62E16BD3B2D5F0542363F0F82AF3A3EB0B5191677A1C93B4098426A7
TrID 40.1% (.EXE) Generic CIL Executable (.NET, Mono, etc.) (73123/4/13)
31.6% (.CPL) Windows Control Panel Item (generic) (57583/11/19)
9.0% (.EXE) Microsoft Visual C++ compiled executable (generic) (16529/12/5)
5.7% (.EXE) Win64 Executable (generic) (10522/11/4)
3.6% (.DLL) Win32 Dynamic Link Library (generic) (6578/25/2)
Magika pebin
Reporter lontze7
Tags:exe QuasarRAT

Intelligence

File Origin
# of uploads :
4
# of downloads :
372
Origin country :
FR FR
Vendor Threat Intelligence
Malware family:
quasar
Create hunting rule
ID:
1
File name:
LB2FI_Client-built.exe
Verdict:
Malicious activity
Analysis date:
2024-12-16 06:36:51 UTC
Tags:
quasar
Link:
https://app.any.run/tasks/15346157-d34a-457f-9761-3bdb73c2a899

Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Detection(s):
Win.Malware.Generic-9883083-0
Create hunting rule

Win.Malware.Msilheracles-9900242-0
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ditekSHen.MALWARE.Win.Trojan.QuasarStealer.UNOFFICIAL
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Win.Packed.Downeks-6898097-0
Create hunting rule

Verdict:
Malicious
Score:
99.9%
Link:
https://cyber-fortress.com/docs/result/index.php?id=675fca828fb73f13afcc6c32
Tags:
infosteal autorun quasar
Result
Verdict:
Malware
Maliciousness:

Behaviour
Creating a window
Сreating synchronization primitives
Creating a file in the %AppData% subdirectories
Launching a process
Enabling the 'hidden' option for recently created files
Creating a process from a recently created file
Creating a file
Connection attempt
Setting a keyboard event handler
Unauthorized injection to a recently created process
Enabling autorun by creating a file
Verdict:
Malicious
Labled as:
Trojan.Agent
Link:
https://www.hybrid-analysis.com/sample/77244092e7dd606f04a3f38af9050f91e6cd78989526e56440a8fa3f5ece758f
Malware family:
Quasar RAT
Create hunting rule
Verdict:
Malicious
Link:
https://analyze.intezer.com/analyses/c30cf264-b19c-45fa-91ce-1e35fca994bc
Result
Threat name:
Quasar
Create hunting rule
Detection:
malicious
Classification:
troj.spyw.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1575652
Signature
AI detected suspicious sample
Antivirus / Scanner detection for submitted sample
Antivirus detection for dropped file
C2 URLs / IPs found in malware configuration
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
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
behaviorgraph top1 signatures2 2 Behavior Graph ID: 1575652 Sample: Client-built.exe Startdate: 16/12/2024 Architecture: WINDOWS Score: 100 32 Found malware configuration 2->32 34 Malicious sample detected (through community Yara rule) 2->34 36 Antivirus / Scanner detection for submitted sample 2->36 38 6 other signatures 2->38 8 Client-built.exe 5 2->8         started        12 Client.exe 3 2->12         started        process3 file4 26 C:\Users\user\AppData\Roaming\...\Client.exe, PE32 8->26 dropped 28 C:\Users\user\...\Client-built.exe.log, CSV 8->28 dropped 40 Uses schtasks.exe or at.exe to add and modify task schedules 8->40 42 Hides that the sample has been downloaded from the Internet (zone.identifier) 8->42 14 Client.exe 2 8->14         started        18 schtasks.exe 1 8->18         started        signatures5 process6 dnsIp7 30 192.168.43.241, 4782, 49701, 49761 unknown unknown 14->30 44 Antivirus detection for dropped file 14->44 46 Multi AV Scanner detection for dropped file 14->46 48 Machine Learning detection for dropped file 14->48 50 2 other signatures 14->50 20 schtasks.exe 1 14->20         started        22 conhost.exe 18->22         started        signatures8 process9 process10 24 conhost.exe 20->24         started       
Score:
100%
Verdict:
Malware
File Type:
PE
Link:
https://malprob.io/report/77244092e7dd606f04a3f38af9050f91e6cd78989526e56440a8fa3f5ece758f
Detection:
quasar
Create hunting rule
Link:
https://mwdb.cert.pl/sample/77244092e7dd606f04a3f38af9050f91e6cd78989526e56440a8fa3f5ece758f/
Threat name:
ByteCode-MSIL.Backdoor.Quasar
Create hunting rule
Status:
Malicious
First seen:
2024-10-25 15:05:38 UTC
File Type:
PE (.Net Exe)
Extracted files:
2
AV detection:
21 of 24 (87.50%)
Threat level:
  5/5
Detection(s):
Malicious file
Link:
https://check.spamhaus.org/check/?searchterm=o4sebexh3vqg6bfd6ofpsbipshtm26eysutokzcavd5d6xwoowhq._file
Verdict:
malicious
Label(s):
quasarrat
Create hunting rule
Similar samples:
3ad07a1878c8b77f9fc0143d8f88c240d8d0b986d015d4c0cd881ad9c0d572e1
QuasarRAT
4e6e48275b1f3412edc045e1a81d509ddcfe360c06bdd4483fcd5b4fc77b7ef3
QuasarRAT
8b745645c7ad72c79c48e6e17679426ef02350fb7ba021b1b031b36b65be2573
QuasarRAT
a451e748bc1e4c05bdaa722b35a5f6dd1a78765ac8967187a61b846f819c8bf6
QuasarRAT
ced760664a7c5580e324d99d695b119c1f3ec94d1d9c56d1d3882347f0c6eb10
QuasarRAT
f99ecbd9f26048dbb962f1711199e5f5d00ac8bbd87f539dd5a99631a15fadba
QuasarRAT
+ 954 additional samples on MalwareBazaar
Result
Malware family:
quasar
Create hunting rule
Score:
  10/10
Tags:
family:quasar botnet:office04 spyware trojan
Link:
https://tria.ge/reports/241216-g9gxqsykfv/
Behaviour
Scheduled Task/Job: Scheduled Task
Suspicious use of AdjustPrivilegeToken
Suspicious use of SetWindowsHookEx
Suspicious use of WriteProcessMemory
Uses Task Scheduler COM API
Executes dropped EXE
Quasar RAT
Quasar family
Quasar payload
Malware Config
C2 Extraction:
192.168.43.241:4782
Verdict:
Malicious
Tags:
rat quasar_rat stealer Win.Malware.Generic-9883083-0
YARA:
malware_windows_quasarrat win_quasar_rat_client MAL_QuasarRAT_May19_1 MALWARE_Win_Quasarstealer
Link:
https://app.threat.zone/submission/5f6c71a3-ca5d-4030-8944-70948c9fbf36
Unpacked files
SH256 hash:
77244092e7dd606f04a3f38af9050f91e6cd78989526e56440a8fa3f5ece758f
MD5 hash:
8f5bd87ff24f2310b9c803b764fdae24
SHA1 hash:
ac5b97def6b237c077c7cbb26a44b813cd40dfbd
Detections:
QuasarRAT
Create hunting rule
Link:
https://www.unpac.me/results/978b3177-98ad-4f1f-bbaf-bfd8f6362e57/
Please note that we are no longer able to provide a coverage score for Virus Total.

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:Detect_PowerShell_Obfuscation
Create hunting rule
Author:daniyyell
Description:Detects obfuscated PowerShell commands commonly used in malicious scripts.
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:pe_imphash
Create hunting rule
Rule name:quasarrat_kingrat
Create hunting rule
Author:jeFF0Falltrades
Rule name:RansomPyShield_Antiransomware
Create hunting rule
Author:XiAnzheng
Description:Check for Suspicious String and Import combination that Ransomware mostly abuse(can create FP)
Rule name:RANSOMWARE
Create hunting rule
Author:ToroGuitar
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

Executable exe 77244092e7dd606f04a3f38af9050f91e6cd78989526e56440a8fa3f5ece758f

(this sample)

  
Delivery method
Distributed via web download
  
URLhaus
https://urlhaus.abuse.ch/url/3351451/

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 (HIGH_ENTROPY_VA)high

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