MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 f9fc23fe47d3c918c7bc24cbe14e56d9b0024e31660f2a280f3991291b3e5882. 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 27 File information Comments
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SHA256 hash: f9fc23fe47d3c918c7bc24cbe14e56d9b0024e31660f2a280f3991291b3e5882
SHA3-384 hash: 576b09147d6df4c5853c5ec047426bb7610db5b1f4c678299cf86f1711f0253a6f7277a0ca8720a4161e51eaf9df7f3a
SHA1 hash: 8eeef2262c4288c035d7be99f27ce478dae008ce
MD5 hash: f31a91bff6bb5805f4f7b95c0a27cb2a
humanhash: nitrogen-purple-oranges-kilo
File name:win64_svchost.exe
Download: download sample
Signature QuasarRAT
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File size:3'360'053 bytes
First seen:2025-01-31 08:47:19 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash 483f0c4259a9148c34961abbda6146c1 (17 x ValleyRAT, 8 x AsyncRAT, 7 x QuasarRAT)
ssdeep 98304:p1AhvWM65Mf9cZR4FklYJr41ADevpgaSoJxqGT4q:WvWM6iGKkCJ0GevCaXsi4q
Threatray 7 similar samples on MalwareBazaar
TLSH T1C3F5230136A24534E4C64735C952B3787F423E9C28F1646A1DF8F9DE72BB189287A9FC
TrID 74.1% (.EXE) Inno Setup installer (107240/4/30)
9.8% (.EXE) Win32 Executable Delphi generic (14182/79/4)
7.2% (.EXE) Win64 Executable (generic) (10522/11/4)
3.1% (.EXE) Win32 Executable (generic) (4504/4/1)
1.4% (.EXE) Win16/32 Executable Delphi generic (2072/23)
Magika pebin
File icon (PE):PE icon
dhash icon f0a3bccce4c4e170 (5 x XWorm, 2 x QuasarRAT, 2 x AsyncRAT)
Reporter JAMESWT_WT
Tags:89-23-97-214 AB exe Quasar QuasarRAT

Intelligence

File Origin
# of uploads :
1
# of downloads :
485
Origin country :
IT IT
Vendor Threat Intelligence
Malware family:
quasar
Create hunting rule
ID:
1
File name:
win64_svchost.exe
Verdict:
Malicious activity
Analysis date:
2025-01-31 08:49:51 UTC
Tags:
evasion rat quasar remote
Link:
https://app.any.run/tasks/a4cec1db-bf9d-46af-ad1b-dce19f6169ba

Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Detection(s):
SecuriteInfo.com.PUA.Systweak.Gen4.14801.UNOFFICIAL
Create hunting rule

Verdict:
Malicious
Score:
99.9%
Link:
https://cyber-fortress.com/docs/result/index.php?id=679c8f186d96a8d7e4cdce63
Tags:
asyncrat dropper remo sage
Result
Verdict:
Malware
Maliciousness:

Behaviour
Creating a window
Creating a process from a recently created file
Сreating synchronization primitives
Restart of the analyzed sample
Creating a process with a hidden window
Searching for the window
Searching for synchronization primitives
Creating a file
Moving a recently created file
Creating a file in the %AppData% directory
Moving a file to the %AppData% directory
Launching a process
Using the Windows Management Instrumentation requests
Enabling the 'hidden' option for recently created files
Connection attempt
Sending a custom TCP request
DNS request
Creating a file in the %temp% subdirectories
Enabling autorun by creating a file
Verdict:
Likely Malicious
Threat level:
  7.5/10
Confidence:
100%
Tags:
embarcadero_delphi fingerprint installer overlay packed packer_detected
Link:
https://www.filescan.io/uploads/679c8e4fde5af00b3e26dd1f/reports/749aac2b-e7ba-47f9-a56c-d9aab830b5d9/overview
Verdict:
Malicious
Labled as:
Win/grayware_confidence_70%
Link:
https://www.hybrid-analysis.com/sample/f9fc23fe47d3c918c7bc24cbe14e56d9b0024e31660f2a280f3991291b3e5882
Result
Verdict:
UNKNOWN
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
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Verdict:
Malicious
Link:
https://analyze.intezer.com/analyses/eaf7d159-b561-431a-a7c0-6bfe196ccea9
Result
Threat name:
Quasar
Create hunting rule
Detection:
malicious
Classification:
troj.spyw.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1603692
Signature
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
Joe Sandbox ML detected suspicious sample
Loading BitLocker PowerShell Module
Malicious sample detected (through community Yara rule)
Multi AV Scanner detection for submitted file
Sigma detected: Potential WinAPI Calls Via CommandLine
Sigma detected: Potentially Suspicious Child Process Of Regsvr32
Sigma detected: Powershell launch regsvr32
Suricata IDS alerts for network traffic
Suspicious powershell command line found
System process connects to network (likely due to code injection or exploit)
Uses Register-ScheduledTask to add task schedules
Yara detected Generic Downloader
Yara detected Quasar RAT
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 1603692 Sample: win64_svchost.exe Startdate: 31/01/2025 Architecture: WINDOWS Score: 100 66 ipwho.is 2->66 74 Suricata IDS alerts for network traffic 2->74 76 Found malware configuration 2->76 78 Malicious sample detected (through community Yara rule) 2->78 80 8 other signatures 2->80 13 win64_svchost.exe 2 2->13         started        16 regsvr32.exe 2->16         started        signatures3 process4 file5 56 C:\Users\user\AppData\...\win64_svchost.tmp, PE32 13->56 dropped 19 win64_svchost.tmp 3 6 13->19         started        72 Suspicious powershell command line found 16->72 22 powershell.exe 16->22         started        signatures6 process7 file8 48 C:\Users\user\AppData\Local\...\_shfoldr.dll, PE32 19->48 dropped 50 C:\Users\user\AppData\Local\...\_setup64.tmp, PE32+ 19->50 dropped 52 C:\Users\user\AppData\Local\...\_isdecmp.dll, PE32 19->52 dropped 25 win64_svchost.exe 2 19->25         started        90 Loading BitLocker PowerShell Module 22->90 28 conhost.exe 22->28         started        signatures9 process10 file11 54 C:\Users\user\AppData\...\win64_svchost.tmp, PE32 25->54 dropped 30 win64_svchost.tmp 19 8 25->30         started        process12 file13 58 C:\Users\user\AppData\Roaming\is-CSMJ7.tmp, PE32+ 30->58 dropped 60 C:\Users\user\AppData\...\7ntdll.drv (copy), PE32+ 30->60 dropped 62 C:\Users\user\AppData\...\unins000.exe (copy), PE32 30->62 dropped 64 4 other files (none is malicious) 30->64 dropped 33 regsvr32.exe 30->33         started        process14 process15 35 regsvr32.exe 14 2 33->35         started        dnsIp16 68 185.147.125.77, 4782, 49957 E-STYLEISP-ASRU Russian Federation 35->68 70 ipwho.is 195.201.57.90, 443, 49971 HETZNER-ASDE Germany 35->70 82 System process connects to network (likely due to code injection or exploit) 35->82 84 Suspicious powershell command line found 35->84 86 Hides that the sample has been downloaded from the Internet (zone.identifier) 35->86 88 2 other signatures 35->88 39 powershell.exe 37 35->39         started        42 powershell.exe 35 35->42         started        signatures17 process18 signatures19 92 Loading BitLocker PowerShell Module 39->92 44 conhost.exe 39->44         started        46 conhost.exe 42->46         started        process20
Score:
66%
Verdict:
Susipicious
File Type:
PE
Link:
https://malprob.io/report/f9fc23fe47d3c918c7bc24cbe14e56d9b0024e31660f2a280f3991291b3e5882
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/f9fc23fe47d3c918c7bc24cbe14e56d9b0024e31660f2a280f3991291b3e5882/
Threat name:
Win32.Backdoor.Quasarrat
Create hunting rule
Status:
Malicious
First seen:
2025-01-30 16:21:29 UTC
File Type:
PE (Exe)
Extracted files:
5
AV detection:
17 of 24 (70.83%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=7h6ch7sh2perrr54etf6ctsw3gyaetrrmyhsukaphgissgz6lcba._file
Verdict:
malicious
Label(s):
quasarrat
Create hunting rule
Similar samples:
56cf6e56aea90ed7b61972ee1eb998f2cf36dfa4ae9b470747b3f378c763e16e
QuasarRAT
616bbced150df4c538374a032a176e88165f5e95f3fffaeae28ffa68cda552a1
QuasarRAT
ab45aef26f5e3abf89c5881c2bda82b8499038ee90b100d6733dffc11e779118
QuasarRAT
e8cc5f2db7d2722143678a6b2f2d9c9ab6fa984c7d9bbf1d2ec06e7c19c7e1b2
QuasarRAT
error
QuasarRAT
f9fc23fe47d3c918c7bc24cbe14e56d9b0024e31660f2a280f3991291b3e5882
QuasarRAT
Result
Malware family:
quasar
Create hunting rule
Score:
  10/10
Tags:
family:quasar botnet:svhost32 discovery execution spyware trojan
Link:
https://tria.ge/reports/250131-kqe6kstjem/
Behaviour
Suspicious behavior: EnumeratesProcesses
Suspicious use of AdjustPrivilegeToken
Suspicious use of FindShellTrayWindow
Suspicious use of SetWindowsHookEx
Suspicious use of WriteProcessMemory
Enumerates physical storage devices
System Location Discovery: System Language Discovery
Drops file in System32 directory
Checks installed software on the system
Command and Scripting Interpreter: PowerShell
Checks computer location settings
Executes dropped EXE
Loads dropped DLL
Quasar RAT
Quasar family
Quasar payload
Malware Config
C2 Extraction:
185.147.125.77:4782
Verdict:
Malicious
Tags:
n/a
YARA:
n/a
Link:
https://app.threat.zone/submission/9b725265-7780-4efb-92b4-6f73af82d8c5
Unpacked files
SH256 hash:
44b8e6a310564338968158a1ed88c8535dece20acb06c5e22d87953c261dfed0
MD5 hash:
9c8886759e736d3f27674e0fff63d40a
SHA1 hash:
ceff6a7b106c3262d9e8496d2ab319821b100541
Link:
https://www.unpac.me/results/a57121be-602e-477a-83f1-2f10dc88485f/
SH256 hash:
fcae74ccb09740303d86a88dd07db209721458e8eb48697f1c7d666a67dd5a07
MD5 hash:
70fcedd0d46d1c97af8e3eb4868c5bf1
SHA1 hash:
42ae1e3080be4720fc1bb97ef63d59f2f26e1558
Link:
https://www.unpac.me/results/a57121be-602e-477a-83f1-2f10dc88485f/
SH256 hash:
a4c86fc4836ac728d7bd96e7915090fd59521a9e74f1d06ef8e5a47c8695fd81
MD5 hash:
4ff75f505fddcc6a9ae62216446205d9
SHA1 hash:
efe32d504ce72f32e92dcf01aa2752b04d81a342
Link:
https://www.unpac.me/results/a57121be-602e-477a-83f1-2f10dc88485f/
SH256 hash:
f9fc23fe47d3c918c7bc24cbe14e56d9b0024e31660f2a280f3991291b3e5882
MD5 hash:
f31a91bff6bb5805f4f7b95c0a27cb2a
SHA1 hash:
8eeef2262c4288c035d7be99f27ce478dae008ce
Link:
https://www.unpac.me/results/a57121be-602e-477a-83f1-2f10dc88485f/
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Malicious File
Score:
1.00
Link:
https://yomi.yoroi.company/submissions/f9fc23fe47d3c918c7bc24cbe14e56d9b0024e31660f2a280f3991291b3e5882

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:Borland
Create hunting rule
Author:malware-lu
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:Lumma_Stealer_Detection
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Author:ashizZz
Description:Detects a specific Lumma Stealer malware sample using unique strings and behaviors
Reference:https://seanthegeek.net/posts/compromized-store-spread-lumma-stealer-using-fake-captcha/
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_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
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Author:phoul (@phoul)
Description:Look for MD5 constants
Rule name:Multifamily_RAT_Detection
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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_detect_tls_callbacks
Create hunting rule
Rule name:pe_imphash
Create hunting rule
Rule name:quasarrat
Create hunting rule
Author:jeFF0Falltrades
Rule name:quasarrat_kingrat
Create hunting rule
Author:jeFF0Falltrades
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:shellcode
Create hunting rule
Author:nex
Description:Matched shellcode byte patterns
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)
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 f9fc23fe47d3c918c7bc24cbe14e56d9b0024e31660f2a280f3991291b3e5882

(this sample)

  
URLhaus
https://urlhaus.abuse.ch/url/3421194/
  
Delivery method
Distributed via web download

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
CHECK_NXMissing Non-Executable Memory Protectioncritical
CHECK_PIEMissing Position-Independent Executable (PIE) Protectionhigh
Reviews
IDCapabilitiesEvidence
SECURITY_BASE_APIUses Security Base APIadvapi32.dll::AdjustTokenPrivileges
WIN32_PROCESS_APICan Create Process and Threadskernel32.dll::CreateProcessW
advapi32.dll::OpenProcessToken
kernel32.dll::CloseHandle
WIN_BASE_APIUses Win Base APIkernel32.dll::LoadLibraryExW
kernel32.dll::LoadLibraryW
kernel32.dll::GetSystemInfo
kernel32.dll::GetStartupInfoA
kernel32.dll::GetDiskFreeSpaceW
kernel32.dll::GetCommandLineW
WIN_BASE_IO_APICan Create Fileskernel32.dll::CreateDirectoryW
kernel32.dll::CreateFileW
kernel32.dll::DeleteFileW
kernel32.dll::GetWindowsDirectoryW
kernel32.dll::GetFileAttributesW
kernel32.dll::FindFirstFileW
WIN_BASE_USER_APIRetrieves Account Informationadvapi32.dll::LookupPrivilegeValueW
WIN_REG_APICan Manipulate Windows Registryadvapi32.dll::RegOpenKeyExW
advapi32.dll::RegQueryValueExW
WIN_USER_APIPerforms GUI Actionsuser32.dll::PeekMessageW
user32.dll::CreateWindowExW

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