MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 9e6fa1f280864e2933528e17984bf2d448b003bda842145f34e63cc8a4b337ef. 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 20 File information Comments
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SHA256 hash: 9e6fa1f280864e2933528e17984bf2d448b003bda842145f34e63cc8a4b337ef
SHA3-384 hash: 29a9333e376193660bd9f2fa18a24e2361c4ea62c3c822df74d001f1c32aea9f582054cd0207e1b0f41c250c839f0b5e
SHA1 hash: 896a403897661d3834f540a10678463f4ef4c81d
MD5 hash: 8c1e7d74c62a687a236a3262f09269d4
humanhash: seventeen-august-uniform-utah
File name:api-ms-win-crt-environment-l1-1-0.exe
Download: download sample
Signature QuasarRAT
Create hunting rule
File size:3'266'048 bytes
First seen:2024-01-12 14:11:43 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'842 x AgentTesla, 19'774 x Formbook, 12'296 x SnakeKeylogger)
ssdeep 49152:Pv1A62jiaQDKwPFlJn3xFQsZQOdmRJ6abR3LoGdMoTHHB72eh2NT:Pve62jiaQDKwPFlJn3TQsZQOdmRJ60
Threatray 362 similar samples on MalwareBazaar
TLSH T12BE56B143BF85E27E1BBE677A5B0041267F0FC1AF363EB0B6581677A1C53B5098026A7
TrID 37.4% (.EXE) Generic CIL Executable (.NET, Mono, etc.) (73123/4/13)
29.5% (.CPL) Windows Control Panel Item (generic) (57583/11/19)
8.4% (.EXE) Microsoft Visual C++ compiled executable (generic) (16529/12/5)
6.7% (.SCR) Windows screen saver (13097/50/3)
5.3% (.EXE) Win64 Executable (generic) (10523/12/4)
Reporter smica83
Tags:exe QuasarRAT

Intelligence

File Origin
# of uploads :
1
# of downloads :
318
Origin country :
HU HU
Vendor Threat Intelligence
Detection:
QuasarStealer
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Link:
https://www.capesandbox.com/analysis/470548/
Detection(s):
Win.Malware.Generic-9883083-0
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Win.Malware.Msilheracles-9900242-0
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ditekSHen.MALWARE.Win.Trojan.QuasarStealer.UNOFFICIAL
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Win.Packed.Downeks-6898097-0
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Result
Verdict:
Malware
Maliciousness:

Behaviour
Searching for the window
Creating a window
Сreating synchronization primitives
Creating a file in the system32 subdirectories
Launching a process
Enabling the 'hidden' option for recently created files
Creating a process from a recently created file
Creating a file
Query of malicious DNS domain
Enabling autorun by creating a file
Unauthorized injection to a system process
Verdict:
Malicious
Threat level:
  10/10
Confidence:
100%
Tags:
anti-vm certreq control crypto expand explorer hook infostealer keylogger lolbin quasar quasarrat rat remote replace schtasks stealer stealer
Link:
https://www.filescan.io/uploads/65a148be784d3498d73d308c/reports/3cf0cf60-c39a-48bb-afb6-e3a81e204fdb/overview
Verdict:
Malicious
Labled as:
MSIL.PasswordStealerA.Generic
Link:
https://www.hybrid-analysis.com/sample/9e6fa1f280864e2933528e17984bf2d448b003bda842145f34e63cc8a4b337ef
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/e64c39e4-43cf-488f-aa63-86686a5248e5
Result
Threat name:
Quasar
Create hunting rule
Detection:
malicious
Classification:
troj.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1373796
Signature
Antivirus / Scanner detection for submitted sample
Antivirus detection for dropped file
C2 URLs / IPs found in malware configuration
Connects to many ports of the same IP (likely port scanning)
Drops executables to the windows directory (C:\Windows) and starts them
Found malware configuration
Hides that the sample has been downloaded from the Internet (zone.identifier)
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 dnsIp2 2 Behavior Graph ID: 1373796 Sample: api-ms-win-crt-environment-... Startdate: 12/01/2024 Architecture: WINDOWS Score: 100 29 szczurson1337.freemyip.com 2->29 41 Found malware configuration 2->41 43 Malicious sample detected (through community Yara rule) 2->43 45 Antivirus / Scanner detection for submitted sample 2->45 47 6 other signatures 2->47 9 api-ms-win-crt-environment-l1-1-0.exe 4 2->9         started        13 api-ms-win-crt-environment-l1-0-1.exe 3 2->13         started        signatures3 process4 file5 27 C:\...\api-ms-win-crt-environment-l1-0-1.exe, PE32 9->27 dropped 49 Drops executables to the windows directory (C:\Windows) and starts them 9->49 51 Uses schtasks.exe or at.exe to add and modify task schedules 9->51 53 Hides that the sample has been downloaded from the Internet (zone.identifier) 9->53 15 api-ms-win-crt-environment-l1-0-1.exe 2 9->15         started        19 schtasks.exe 1 9->19         started        signatures6 process7 dnsIp8 31 szczurson1337.freemyip.com 147.185.221.17, 63027 SALSGIVERUS United States 15->31 33 Antivirus detection for dropped file 15->33 35 Multi AV Scanner detection for dropped file 15->35 37 Machine Learning detection for dropped file 15->37 39 Hides that the sample has been downloaded from the Internet (zone.identifier) 15->39 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/9e6fa1f280864e2933528e17984bf2d448b003bda842145f34e63cc8a4b337ef
Detection:
quasar
Create hunting rule
Link:
https://mwdb.cert.pl/sample/9e6fa1f280864e2933528e17984bf2d448b003bda842145f34e63cc8a4b337ef/
Threat name:
ByteCode-MSIL.Trojan.Quasar
Create hunting rule
Status:
Malicious
First seen:
2024-01-12 14:12:05 UTC
File Type:
PE (.Net Exe)
Extracted files:
2
AV detection:
28 of 37 (75.68%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=tzx2d4uaqzhcsm2srylzqs7s2relaa55vbbbixzu4y6mrjftg7xq._file
Verdict:
malicious
Similar samples:
02f0a7f184fcdaaa4d9a46ca29712c8daae0a46d2038bd362dc818025df8d553
QuasarRAT
2f511d2b5082a059bbc56ddd78b3a2dbe221941f70b42d1e7740dbdcd4a5be12
QuasarRAT
5abb3690139201632ca77d335dc003268eaf58f2fa0736fb187d843e597a2c9b
QuasarRAT
88f244f1882d4be11fb49e7a367cd93d57f2bed658f573b4d51a277822d17840
QuasarRAT
c7550dc220b264239f7250607d6af8a0123107be4c377a3c94e5f8e63984b17d
QuasarRAT
e844192fb4c52758db729e18e8898fe0921bdbe1e2d3ac3da6a6b5d2cedecb71
QuasarRAT
+ 352 additional samples on MalwareBazaar
Result
Malware family:
quasar
Create hunting rule
Score:
  10/10
Tags:
family:quasar botnet:svchost spyware trojan
Link:
https://tria.ge/reports/240112-rht34ahdfp/
Behaviour
Creates scheduled task(s)
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
Uses Task Scheduler COM API
Drops file in System32 directory
Executes dropped EXE
Quasar RAT
Quasar payload
Malware Config
C2 Extraction:
szczurson1337.freemyip.com:63027
Unpacked files
SH256 hash:
9e6fa1f280864e2933528e17984bf2d448b003bda842145f34e63cc8a4b337ef
MD5 hash:
8c1e7d74c62a687a236a3262f09269d4
SHA1 hash:
896a403897661d3834f540a10678463f4ef4c81d
Detections:
QuasarRAT
Create hunting rule
malware_windows_xrat_quasarrat
Create hunting rule
win_quasarrat_j2
Create hunting rule
MALWARE_Win_QuasarStealer
Create hunting rule
cn_utf8_windows_terminal
Create hunting rule
INDICATOR_SUSPICIOUS_EXE_NoneWindowsUA
Create hunting rule
MAL_QuasarRAT_May19_1
Create hunting rule
INDICATOR_SUSPICIOUS_Binary_References_Browsers
Create hunting rule
INDICATOR_SUSPICIOUS_GENInfoStealer
Create hunting rule
Link:
https://www.unpac.me/results/2a70a2a4-71c8-4558-ba33-16bde48e6624/
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/9e6fa1f280864e2933528e17984bf2d448b003bda842145f34e63cc8a4b337ef

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:Diff_QuasarRAT_01
Create hunting rule
Author:schmidtsz
Description:Identify QuasarRAT samples
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
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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:NETexecutableMicrosoft
Create hunting rule
Author:malware-lu
Rule name:pe_imphash
Create hunting rule
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: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.

Cape
Cape
https://www.capesandbox.com/analysis/470548/

Comments