MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 c5cb97fbe4243df1a99a9c82f44ad555f283fad9f4b15b791faebe5048c8fc99. 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: 20


Intelligence 20 IOCs YARA 24 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: c5cb97fbe4243df1a99a9c82f44ad555f283fad9f4b15b791faebe5048c8fc99
SHA3-384 hash: c09d30816ad648058bd7e761b3e033ec85c83366e74772a8b51d6351ebc9d98142251d99b7f2a325ca40d8d972fda6b9
SHA1 hash: deb26a1b7f616c8d392ae55dd279140b034a4060
MD5 hash: 3e8b57c2be9df63483a368b71ccb938b
humanhash: jupiter-beer-double-robert
File name:Client.exe
Download: download sample
Signature QuasarRAT
Create hunting rule
File size:3'266'048 bytes
First seen:2024-09-06 12:53:40 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'663 x AgentTesla, 19'478 x Formbook, 12'208 x SnakeKeylogger)
ssdeep 49152:Dvwt62XlaSFNWPjljiFa2RoUYIMIW+sWvoGdBNZTHHB72eh2NT:Dv862XlaSFNWPjljiFXRoUYIjW+s6
Threatray 810 similar samples on MalwareBazaar
TLSH T1D1E56B0537F85E32E16BD7B3E5B0501263F1F82AF363EB0B5181A77A5C93B5488426A7
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) (10523/12/4)
3.6% (.DLL) Win32 Dynamic Link Library (generic) (6578/25/2)
Magika pebin
Reporter NDA0E
Tags:exe geo GRC PiraeusBank QuasarRAT unpacked

Intelligence

File Origin
# of uploads :
1
# of downloads :
419
Origin country :
NL NL
Vendor Threat Intelligence
Malware family:
asyncrat
Create hunting rule
ID:
1
File name:
Client.exe
Verdict:
Malicious activity
Analysis date:
2024-09-06 12:55:58 UTC
Tags:
rat asyncrat remote quasar evasion
Link:
https://app.any.run/tasks/5f701718-f370-4ca5-9da7-25ad6fe76476

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
Create hunting rule

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

Win.Packed.Downeks-6898097-0
Create hunting rule

Verdict:
Malicious
Score:
99.9%
Link:
https://cyber-fortress.com/docs/result/index.php?id=66dafb6e8e12b8124ac95de3
Tags:
Execution Generic Network Stealth
Result
Verdict:
Malware
Maliciousness:

Behaviour
Searching for the window
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
Setting a keyboard event handler
DNS request
Connection attempt
Sending a custom TCP request
Using the Windows Management Instrumentation requests
Unauthorized injection to a recently created 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/66dafb7b5c8b8a8b65fe3145/reports/b100e55b-0d83-4ee7-955e-25655aabcbc9/overview
Verdict:
Malicious
Labled as:
Win/malicious_confidence_100%
Link:
https://www.hybrid-analysis.com/sample/c5cb97fbe4243df1a99a9c82f44ad555f283fad9f4b15b791faebe5048c8fc99
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
Create hunting rule
Verdict:
Malicious
Link:
https://analyze.intezer.com/analyses/7740b4a2-f4d9-4994-b7b8-9cb2dbddc5a0
Result
Threat name:
Quasar
Create hunting rule
Detection:
malicious
Classification:
troj.spyw.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1505598
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
Suricata IDS alerts 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
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 1505598 Sample: Client.exe Startdate: 06/09/2024 Architecture: WINDOWS Score: 100 31 twart.myfirewall.org 2->31 33 ipwho.is 2->33 35 bg.microsoft.map.fastly.net 2->35 49 Suricata IDS alerts for network traffic 2->49 51 Found malware configuration 2->51 53 Malicious sample detected (through community Yara rule) 2->53 55 7 other signatures 2->55 9 Client.exe 5 2->9         started        13 workbook.exe 3 2->13         started        signatures3 process4 file5 27 C:\Users\user\AppData\...\workbook.exe, PE32 9->27 dropped 29 C:\Users\user\AppData\...\Client.exe.log, CSV 9->29 dropped 57 Uses schtasks.exe or at.exe to add and modify task schedules 9->57 59 Hides that the sample has been downloaded from the Internet (zone.identifier) 9->59 15 workbook.exe 14 2 9->15         started        19 schtasks.exe 1 9->19         started        signatures6 process7 dnsIp8 37 twart.myfirewall.org 213.159.74.80, 49712, 9792 CTINET-ASCTINETAutonomousSystemRU Russian Federation 15->37 39 ipwho.is 195.201.57.90, 443, 49714 HETZNER-ASDE Germany 15->39 41 Antivirus detection for dropped file 15->41 43 Multi AV Scanner detection for dropped file 15->43 45 Machine Learning detection for dropped file 15->45 47 2 other signatures 15->47 21 schtasks.exe 1 15->21         started        23 conhost.exe 19->23         started        signatures9 process10 process11 25 conhost.exe 21->25         started       
Score:
99%
Verdict:
Malware
File Type:
PE
Link:
https://malprob.io/report/c5cb97fbe4243df1a99a9c82f44ad555f283fad9f4b15b791faebe5048c8fc99
Detection:
quasar
Create hunting rule
Link:
https://mwdb.cert.pl/sample/c5cb97fbe4243df1a99a9c82f44ad555f283fad9f4b15b791faebe5048c8fc99/
Threat name:
ByteCode-MSIL.Backdoor.Quasar
Create hunting rule
Status:
Malicious
First seen:
2024-09-06 12:54:06 UTC
File Type:
PE (.Net Exe)
Extracted files:
2
AV detection:
28 of 38 (73.68%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=yxfzp67eeq67dkm2tsbpiswvkxzih6wz6syvw6i7v27fasgi7smq._file
Verdict:
malicious
Similar samples:
17abf2eb5bfc5f1be41bbba2e0b1cb59787e3879d152bf6ff9b4d91702a402c4
QuasarRAT
30c381a042e571d4d749f7aff6e1b17d77100ad35368c9a67136c1b5436c79cb
QuasarRAT
64f51e7b139ab5cf5829321a7ea0e7cc8aad04f1ec1d872345ee029e679dd2af
QuasarRAT
deebb3404de726f330e122ea377c38a79970788de0205b3ccfca1b8b99cf0291
QuasarRAT
f72153dbb753423e630840ed3674c6a0ce27b4ff5d1790a5bbb6d5707f9ed41e
QuasarRAT
f99ecbd9f26048dbb962f1711199e5f5d00ac8bbd87f539dd5a99631a15fadba
QuasarRAT
+ 800 additional samples on MalwareBazaar
Result
Malware family:
quasar
Create hunting rule
Score:
  10/10
Tags:
family:quasar botnet:long leg spyware trojan
Link:
https://tria.ge/reports/240906-p47j7sxbrm/
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 payload
Malware Config
C2 Extraction:
twart.myfirewall.org:9792
Verdict:
Malicious
Tags:
n/a
YARA:
n/a
Link:
https://app.threat.zone/submission/ae108bf4-2bba-4d70-93dc-f7db842e6bee
Unpacked files
SH256 hash:
c5cb97fbe4243df1a99a9c82f44ad555f283fad9f4b15b791faebe5048c8fc99
MD5 hash:
3e8b57c2be9df63483a368b71ccb938b
SHA1 hash:
deb26a1b7f616c8d392ae55dd279140b034a4060
Detections:
QuasarRAT
Create hunting rule
malware_windows_xrat_quasarrat
Create hunting rule
win_quasarrat_j2
Create hunting rule
cn_utf8_windows_terminal
Create hunting rule
MAL_QuasarRAT_May19_1
Create hunting rule
Link:
https://www.unpac.me/results/49e9d7a6-5325-4acf-93a4-d94b37e015e5/
Parent samples :
5a3a32262eb6d6ca3126a6055e32cd1c0a680637b3f238d0fbb0e36bc9b8081d
3255bba29d1d4de38cb9d72636251ed19516ee5c090512f4332f38b837cf13f0
d80b06effbd34b981b32276034abe3c118ac51a53ace4a253bb52c90cb18f13d
a388e34ff2cb46b718c443618a4597468bfc2236195c06bccbfa71dbf5d47479
c40f2fe5758bf18b22131930c426b2551b191d4ec50ea072a232895d006eace1
c5cb97fbe4243df1a99a9c82f44ad555f283fad9f4b15b791faebe5048c8fc99
6230049aca6cf64db37be7c35946481041629c4f40311f5a39ba45303bd992e7
f9fe40ca4d842619322a11c4013a2210132d4c7afa0c4ae88be17f13ee6d1b16
fd3b039df3e9a565b6964276f98c61d4555f3f3dabf1a9d76604f9ff4d4b3fb7
b4a61a178dfda52928802e1189f3bf1bef1c03aecf6b6fc99d2a3713f3d5e202
Malware family:
QuasarRAT
Create hunting rule
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/c5cb97fbe424/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/c5cb97fbe4243df1a99a9c82f44ad555f283fad9f4b15b791faebe5048c8fc99

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:NETexecutableMicrosoft
Create hunting rule
Author:malware-lu
Rule name:pe_imphash
Create hunting rule
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.

QuasarRAT

Executable exe c40f2fe5758bf18b22131930c426b2551b191d4ec50ea072a232895d006eace1

QuasarRAT

Executable exe c5cb97fbe4243df1a99a9c82f44ad555f283fad9f4b15b791faebe5048c8fc99

(this sample)

  
Dropped by
SHA256 c40f2fe5758bf18b22131930c426b2551b191d4ec50ea072a232895d006eace1
  
Dropped by
MD5 1e66ed26d089fb5a4070d6ed4706ef0c

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

Comments