MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 f7ef64ec582497050725afe8562b18971ba4b828ec640075c15976c7a941ba42. 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: 10


Intelligence 10 IOCs YARA 3 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: f7ef64ec582497050725afe8562b18971ba4b828ec640075c15976c7a941ba42
SHA3-384 hash: 23c621b9efeb83aac77d9b478cb81dfead8491b5f1d778de438916081320201409625a574973b4fd6ba1b42ad4457c06
SHA1 hash: 2f4e5fba7842d12584fcbeca826f718b2749f3db
MD5 hash: 12d2ff2778e1f5365510bc270c2218ee
humanhash: low-nebraska-spring-echo
File name:Notes0615.bat
Download: download sample
Signature QuasarRAT
Create hunting rule
File size:845'824 bytes
First seen:2022-07-25 08:57:29 UTC
Last seen:2022-07-25 09:52:08 UTC
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'658 x AgentTesla, 19'469 x Formbook, 12'208 x SnakeKeylogger)
ssdeep 24576:GaCQGBk6EdguVZ+ivrcwy8PMHmJZudddagzUsiWh6XOfnbcaFg78MjobD9Y7coVQ:N9bdgS4twxPMHUudddagzUsiWh6XOfnf
TLSH T10F05CEF6B6EB041CD812BC398DB8AD27F866ED32148D507CEF3D665E51F42BA0184792
TrID 72.5% (.EXE) Generic CIL Executable (.NET, Mono, etc.) (73123/4/13)
10.4% (.EXE) Win64 Executable (generic) (10523/12/4)
6.5% (.DLL) Win32 Dynamic Link Library (generic) (6578/25/2)
4.4% (.EXE) Win32 Executable (generic) (4505/5/1)
2.0% (.EXE) OS/2 Executable (generic) (2029/13)
File icon (PE):PE icon
dhash icon 0800e2eeece2e468 (10 x AgentTesla, 4 x NanoCore, 2 x QuasarRAT)
Reporter GovCERT_CH
Tags:exe QuasarRAT

Intelligence

File Origin
# of uploads :
2
# of downloads :
267
Origin country :
n/a
Vendor Threat Intelligence
Detection:
n/a
Link:
https://www.capesandbox.com/analysis/293922/
Detection(s):
SecuriteInfo.com.W32.AIDetectNet.01.23348.24747.UNOFFICIAL
Create hunting rule

Result
Verdict:
Malware
Maliciousness:

Behaviour
Сreating synchronization primitives
Launching a process
Creating a process with a hidden window
Sending a custom TCP request
Creating a file in the %AppData% subdirectories
Unauthorized injection to a recently created process
Creating a file
Creating a window
Using the Windows Management Instrumentation requests
Enabling autorun with the standard Software\Microsoft\Windows\CurrentVersion\Run registry branch
Verdict:
Malicious
Threat level:
  10/10
Confidence:
100%
Tags:
packed
Link:
https://www.filescan.io/uploads/62de5b9ae18d450dc6883541/reports/72ded06c-08e3-4bfa-9a53-8895f91128ff/overview
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:
BluStealer
Create hunting rule
Verdict:
Malicious
Link:
https://analyze.intezer.com/analyses/afdd8cd8-8c30-4c65-84f5-4a70cb31cc56
Result
Threat name:
BluStealer
Create hunting rule
Detection:
malicious
Classification:
troj.spyw.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1040238
Signature
.NET source code contains potential unpacker
.NET source code contains very large array initializations
Encrypted powershell cmdline option found
Injects a PE file into a foreign processes
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
Queries sensitive BIOS Information (via WMI, Win32_Bios & Win32_BaseBoard, often done to detect virtual machines)
Tries to harvest and steal browser information (history, passwords, etc)
Tries to steal Crypto Currency Wallets
Writes or reads registry keys via WMI
Yara detected BluStealer
Yara detected Generic Downloader
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 signatures2 2 Behavior Graph ID: 672732 Sample: Notes0615.bat Startdate: 25/07/2022 Architecture: WINDOWS Score: 100 54 Malicious sample detected (through community Yara rule) 2->54 56 Multi AV Scanner detection for submitted file 2->56 58 Yara detected BluStealer 2->58 60 4 other signatures 2->60 7 Notes0615.exe 1 5 2->7         started        11 Wmszkdbui.exe 2 2->11         started        13 Wmszkdbui.exe 1 2->13         started        process3 dnsIp4 42 C:\Users\user\AppData\...\Wmszkdbui.exe, PE32 7->42 dropped 44 C:\Users\...\Wmszkdbui.exe:Zone.Identifier, ASCII 7->44 dropped 46 C:\Users\user\AppData\...46otes0615.exe.log, ASCII 7->46 dropped 62 Queries sensitive BIOS Information (via WMI, Win32_Bios & Win32_BaseBoard, often done to detect virtual machines) 7->62 64 Encrypted powershell cmdline option found 7->64 66 Writes or reads registry keys via WMI 7->66 16 Notes0615.exe 3 11 7->16         started        20 powershell.exe 13 7->20         started        68 Multi AV Scanner detection for dropped file 11->68 70 Machine Learning detection for dropped file 11->70 22 Wmszkdbui.exe 11->22         started        24 powershell.exe 11->24         started        26 Wmszkdbui.exe 11->26         started        48 192.168.2.1 unknown unknown 13->48 72 Injects a PE file into a foreign processes 13->72 28 powershell.exe 13->28         started        30 Wmszkdbui.exe 13->30         started        file5 signatures6 process7 file8 38 C:\Users\Public\...\sqlite3.dll, PE32 16->38 dropped 40 C:\Users\Public\...\SQLite3_StdCall.dll, PE32 16->40 dropped 32 conhost.exe 20->32         started        50 Tries to harvest and steal browser information (history, passwords, etc) 22->50 52 Tries to steal Crypto Currency Wallets 22->52 34 conhost.exe 24->34         started        36 conhost.exe 28->36         started        signatures9 process10
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/f7ef64ec582497050725afe8562b18971ba4b828ec640075c15976c7a941ba42/
Threat name:
Win32.Trojan.Seraph
Create hunting rule
Status:
Malicious
First seen:
2022-07-25 06:17:47 UTC
File Type:
PE (.Net Exe)
Extracted files:
4
AV detection:
23 of 26 (88.46%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=67xwj3cyeslqkbzfv7ufmkyys4n2jobi5rsaa5oblf3mpkkbxjba._file
Verdict:
malicious
Result
Malware family:
blustealer
Create hunting rule
Score:
  10/10
Tags:
family:blustealer persistence spyware stealer
Link:
https://tria.ge/reports/220725-kw6wgsahg9/
Behaviour
Suspicious behavior: EnumeratesProcesses
Suspicious use of AdjustPrivilegeToken
Suspicious use of SetWindowsHookEx
Suspicious use of WriteProcessMemory
Enumerates physical storage devices
Suspicious use of SetThreadContext
Accesses cryptocurrency files/wallets, possible credential harvesting
Adds Run key to start application
Checks computer location settings
Loads dropped DLL
Reads user/profile data of web browsers
BluStealer
Unpacked files
SH256 hash:
727b53d735fc8fd84ec4f9ec2f5e7c075eb51558d64ca984d834ba38a58f2cee
MD5 hash:
90b2242872aad48aad2ad8119b3f3eb0
SHA1 hash:
36957c835ad0d436537a7f5d5a38561a3461d225
Link:
https://www.unpac.me/results/f0d70f68-7042-4fca-8cd9-37fa009477aa/
SH256 hash:
a6acfe617040a5005be0d1675756dc9f09596d3bb2bb3ebc8a2c6881b8c4cfd7
MD5 hash:
db843358b89f4074346cab346720ab06
SHA1 hash:
94d77a5f2d66f20baf557ad30c3ab284665980d9
Link:
https://www.unpac.me/results/f0d70f68-7042-4fca-8cd9-37fa009477aa/
SH256 hash:
fc537ed5e7912f4edc5d3b3b41957a27194acbbb6293f37bbada5d8a050cf0f3
MD5 hash:
5e69504c88b5e6a4913ed5900c8e4bfd
SHA1 hash:
2a495b003352407329d4f1fb2630ff96e9811e5a
Link:
https://www.unpac.me/results/f0d70f68-7042-4fca-8cd9-37fa009477aa/
SH256 hash:
f767f71e8dcbbebf3144e1944ceda25f5c2af7a2911c70e8917ebbc75a934ba4
MD5 hash:
17bc3374f82654bca9aad8a3b138ba08
SHA1 hash:
00d6f3a67b00e9d58c42f12196b6e6fbbacb3ac4
Link:
https://www.unpac.me/results/f0d70f68-7042-4fca-8cd9-37fa009477aa/
SH256 hash:
f7ef64ec582497050725afe8562b18971ba4b828ec640075c15976c7a941ba42
MD5 hash:
12d2ff2778e1f5365510bc270c2218ee
SHA1 hash:
2f4e5fba7842d12584fcbeca826f718b2749f3db
Link:
https://www.unpac.me/results/f0d70f68-7042-4fca-8cd9-37fa009477aa/
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/f7ef64ec5824/report/overview.html
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/f7ef64ec582497050725afe8562b18971ba4b828ec640075c15976c7a941ba42

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_EXE_CC_Regex
Create hunting rule
Author:ditekSHen
Description:Detects executables referencing credit card regular expressions
Rule name:pe_imphash
Create hunting rule
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.

Malspam

QuasarRAT

Executable exe f7ef64ec582497050725afe8562b18971ba4b828ec640075c15976c7a941ba42

(this sample)

  
Delivery method
Distributed via e-mail attachment
Cape
Cape
https://www.capesandbox.com/analysis/293922/

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