MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 cfba9dab9282455d194d30dad7eac6cfc5c8e5d6caf94d631ed2b01a86e3a97f. 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: 13


Intelligence 13 IOCs YARA 13 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: cfba9dab9282455d194d30dad7eac6cfc5c8e5d6caf94d631ed2b01a86e3a97f
SHA3-384 hash: 4a02689ebadc13fcf7fb5b20b6ce341cc1c5073b574d52d40dc25bae1127bf6c8a3d28cbdaae8e0f53eec548a2e95efe
SHA1 hash: a2ded46cf05a9b990b18e041a2ec38b1b99a8718
MD5 hash: ae2bc99fa3d39c5ce41fc2f5daf84492
humanhash: football-mike-cat-stream
File name:Client-built.exe
Download: download sample
Signature QuasarRAT
Create hunting rule
File size:2'898'944 bytes
First seen:2022-09-26 15:35:32 UTC
Last seen:2023-06-12 19:39:52 UTC
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'652 x AgentTesla, 19'463 x Formbook, 12'204 x SnakeKeylogger)
ssdeep 49152:V0quZIhnwj8O/1ERxfzWOe4ZS7jVNtYNXUfRza32ehyfTlm:V0fZIhnwj88+RxfzWOe4ZS7jVNtK
TLSH T197D54A1877F84E2BE07ED7B2E5B0105267F1F82AB3A3EB4B618166790D53B405D412BB
TrID 53.9% (.EXE) Generic CIL Executable (.NET, Mono, etc.) (73123/4/13)
12.2% (.EXE) Microsoft Visual C++ compiled executable (generic) (16529/12/5)
9.6% (.SCR) Windows screen saver (13101/52/3)
7.7% (.EXE) Win64 Executable (generic) (10523/12/4)
4.8% (.DLL) Win32 Dynamic Link Library (generic) (6578/25/2)
Reporter r3dbU7z
Tags:exe QuasarRAT

Intelligence

File Origin
# of uploads :
2
# of downloads :
285
Origin country :
n/a
Vendor Threat Intelligence
Detection:
n/a
Link:
https://www.capesandbox.com/analysis/313642/
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

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 autorun by creating a file
Verdict:
Malicious
Threat level:
  10/10
Confidence:
100%
Tags:
anti-vm keylogger quasar quasarrat rat stealer
Link:
https://www.filescan.io/uploads/6331c6e30569d591125fafd9/reports/7c78048c-bf3c-4160-87e0-949052a07564/overview
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.
Verdict:
Malicious
Link:
https://analyze.intezer.com/analyses/1ca8058e-1907-49d5-a769-ae33a2c34a12
Result
Threat name:
Quasar
Create hunting rule
Detection:
malicious
Classification:
troj.spyw.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1077470
Signature
Antivirus / Scanner detection for submitted sample
Antivirus detection for dropped file
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 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 dnsIp2 2 Behavior Graph ID: 710021 Sample: Client-built.exe Startdate: 26/09/2022 Architecture: WINDOWS Score: 100 31 fsociety-router.asuscomm.com 2->31 45 Malicious sample detected (through community Yara rule) 2->45 47 Antivirus / Scanner detection for submitted sample 2->47 49 Multi AV Scanner detection for submitted file 2->49 51 3 other signatures 2->51 9 Client-built.exe 5 2->9         started        13 Client-built.exe 2 2->13         started        signatures3 process4 file5 27 C:\Users\user\AppData\...behaviorgraphzrClient.exe, Unknown 9->27 dropped 29 C:\Users\user\...\Client-built.exe.log, Unknown 9->29 dropped 53 Uses schtasks.exe or at.exe to add and modify task schedules 9->53 55 Hides that the sample has been downloaded from the Internet (zone.identifier) 9->55 15 GzrClient.exe 2 9->15         started        19 schtasks.exe 1 9->19         started        signatures6 process7 dnsIp8 33 fsociety-router.asuscomm.com 80.213.5.74, 13370, 49720, 49721 TELENOR-NEXTELTelenorNorgeASNO Norway 15->33 35 192.168.2.1 unknown unknown 15->35 37 Antivirus detection for dropped file 15->37 39 Machine Learning detection for dropped file 15->39 41 Hides that the sample has been downloaded from the Internet (zone.identifier) 15->41 43 Installs a global keyboard hook 15->43 21 schtasks.exe 1 15->21         started        23 conhost.exe 19->23         started        signatures9 process10 process11 25 conhost.exe 21->25         started       
Detection:
quasar
Create hunting rule
Link:
https://mwdb.cert.pl/sample/cfba9dab9282455d194d30dad7eac6cfc5c8e5d6caf94d631ed2b01a86e3a97f/
Threat name:
ByteCode-MSIL.Trojan.Quasar
Create hunting rule
Status:
Malicious
First seen:
2022-09-16 16:03:51 UTC
File Type:
PE (.Net Exe)
Extracted files:
2
AV detection:
23 of 26 (88.46%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=z65j3k4sqjcv2gkngdnnp2wgz7c4rzowzl4u2yy62kybvbxdvf7q._file
Verdict:
malicious
Result
Malware family:
quasar
Create hunting rule
Score:
  10/10
Tags:
family:quasar botnet:fsociety spyware trojan
Link:
https://tria.ge/reports/220926-s1wv3scdcr/
Behaviour
Creates scheduled task(s)
Suspicious use of AdjustPrivilegeToken
Suspicious use of SetWindowsHookEx
Suspicious use of WriteProcessMemory
Executes dropped EXE
Quasar RAT
Quasar payload
Malware Config
C2 Extraction:
fsociety-router.asuscomm.com:13370
Verdict:
Malicious
Tags:
n/a
YARA:
n/a
Link:
https://app.threat.zone/submission/22a9c64c-f8c8-4260-b41a-2e9d427b995a
Unpacked files
SH256 hash:
cfba9dab9282455d194d30dad7eac6cfc5c8e5d6caf94d631ed2b01a86e3a97f
MD5 hash:
ae2bc99fa3d39c5ce41fc2f5daf84492
SHA1 hash:
a2ded46cf05a9b990b18e041a2ec38b1b99a8718
Link:
https://www.unpac.me/results/5f26d4b2-6a2f-421c-a413-6f9a187899b1/
Malware family:
QuasarRAT
Create hunting rule
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/cfba9dab9282/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/cfba9dab9282455d194d30dad7eac6cfc5c8e5d6caf94d631ed2b01a86e3a97f

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: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 artifcats 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
Author:Florian Roth
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:pe_imphash
Create hunting rule
Rule name:RansomwareTest2
Create hunting rule
Author:Daoyuan Wu
Description:Test Ransomware YARA rules
Rule name:RansomwareTest3
Create hunting rule
Author:Daoyuan Wu
Description:Test Ransomware YARA rules
Rule name:RansomwareTest4
Create hunting rule
Author:Daoyuan Wu
Description:Test Ransomware YARA rules
Rule name:RansomwareTest5
Create hunting rule
Author:Daoyuan Wu
Description:Test Ransomware YARA rules
Rule name:RansomwareTest6
Create hunting rule
Author:Daoyuan Wu
Description:Test Ransomware YARA rules
Rule name:Skystars_Malware_Imphash
Create hunting rule
Author:Skystars LightDefender
Description:imphash

File information

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

Web download

QuasarRAT

Executable exe cfba9dab9282455d194d30dad7eac6cfc5c8e5d6caf94d631ed2b01a86e3a97f

(this sample)

  
Delivery method
Distributed via web download
Cape
Cape
https://www.capesandbox.com/analysis/313642/

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