MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 8bf39c82088d376f612259550f253fe8c6a5a747de4c4b7b22077f47dd321ffe. 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


NanoCore


Vendor detections: 13


Intelligence 13 IOCs YARA 7 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 8bf39c82088d376f612259550f253fe8c6a5a747de4c4b7b22077f47dd321ffe
SHA3-384 hash: 9b299fbc0e423c167d1b34f7a00902def8b8465ccb62c1337df471d468fbfee94c3b9ac39a51e65401205de28229b789
SHA1 hash: c075e5ed70ae9b54aabbd63520beeb2da03a6fd1
MD5 hash: dab2b15e2a666145f861832443fba057
humanhash: robin-potato-carolina-beer
File name:receipt confimration.exe
Download: download sample
Signature NanoCore
Create hunting rule
File size:1'248'256 bytes
First seen:2023-05-11 00:00:54 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'740 x AgentTesla, 19'603 x Formbook, 12'241 x SnakeKeylogger)
ssdeep 24576:GasfVIB2GcLfbk7IqwMIvtOHXHuufQMcnmHOVB6xO:bs9TNjbCvBHuuFHO
Threatray 90 similar samples on MalwareBazaar
TLSH T1CE45D0B3B6A6FEE5ABF41D94E8B612090C44FFB76228D0ACF88851CF51B4554ED19CB0
TrID 63.0% (.EXE) Generic CIL Executable (.NET, Mono, etc.) (73123/4/13)
11.2% (.SCR) Windows screen saver (13097/50/3)
9.0% (.EXE) Win64 Executable (generic) (10523/12/4)
5.6% (.DLL) Win32 Dynamic Link Library (generic) (6578/25/2)
3.8% (.EXE) Win32 Executable (generic) (4505/5/1)
Reporter abuse_ch
Tags:exe NanoCore RAT


Avatar
abuse_ch
NanoCore C2:
3.145.201.105:3436

Intelligence

File Origin
# of uploads :
1
# of downloads :
399
Origin country :
NL NL
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
receipt confimration.exe
Verdict:
Malicious activity
Analysis date:
2023-05-11 00:02:33 UTC
Tags:
n/a
Link:
https://app.any.run/tasks/6a2aef16-aa9e-44ca-b485-742cb6f0e451

Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Detection:
n/a
Link:
https://www.capesandbox.com/analysis/388299/
Detection(s):
SecuriteInfo.com.Heur.MSIL.Krypt.11.11086.27012.UNOFFICIAL
Create hunting rule

Result
Verdict:
Malware
Maliciousness:

Behaviour
Searching for the window
Creating a file in the %AppData% subdirectories
Сreating synchronization primitives
DNS request
Sending a custom TCP request
Unauthorized injection to a recently created process
Creating a file
Creating a window
Using the Windows Management Instrumentation requests
Sending an HTTP GET request
Creating a file in the %temp% directory
Enabling autorun with the standard Software\Microsoft\Windows\CurrentVersion\Run registry branch
Setting a global event handler for the keyboard
Verdict:
Suspicious
Threat level:
  5/10
Confidence:
100%
Tags:
packed
Link:
https://www.filescan.io/uploads/645c303f4698ab2675291270/reports/f938c48f-683a-45bc-9481-d478c734864c/overview
Verdict:
Malicious
Labled as:
MSIL.Krypt.Generic
Link:
https://www.hybrid-analysis.com/sample/8bf39c82088d376f612259550f253fe8c6a5a747de4c4b7b22077f47dd321ffe
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:
XWorm
Create hunting rule
Verdict:
Malicious
Link:
https://analyze.intezer.com/analyses/1bd1d959-79a9-4871-a9ba-203c2b581753
Result
Threat name:
XWorm
Create hunting rule
Detection:
malicious
Classification:
troj.spyw.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1230464
Signature
.NET source code contains method to dynamically call methods (often used by packers)
.NET source code contains potential unpacker
Antivirus / Scanner detection for submitted sample
Antivirus detection for dropped file
Antivirus detection for URL or domain
C2 URLs / IPs found in malware configuration
Contains functionality to capture screen (.Net source)
Contains functionality to log keystrokes (.Net Source)
Found malware configuration
Initial sample is a PE file and has a suspicious name
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
Yara detected XWorm
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 signatures2 2 Behavior Graph ID: 863446 Sample: receipt_confimration.exe Startdate: 11/05/2023 Architecture: WINDOWS Score: 100 43 Found malware configuration 2->43 45 Malicious sample detected (through community Yara rule) 2->45 47 Antivirus detection for URL or domain 2->47 49 12 other signatures 2->49 6 receipt_confimration.exe 16 6 2->6         started        11 Vpvysmb.exe 3 2->11         started        13 Vpvysmb.exe 2 2->13         started        process3 dnsIp4 35 149.154.167.220 TELEGRAMRU United Kingdom 6->35 37 8.8.8.8 GOOGLEUS United States 6->37 29 C:\Users\user\AppData\Roaming\...\Vpvysmb.exe, PE32 6->29 dropped 31 C:\Users\user\...\Vpvysmb.exe:Zone.Identifier, ASCII 6->31 dropped 33 C:\Users\...\receipt_confimration.exe.log, ASCII 6->33 dropped 51 Injects a PE file into a foreign processes 6->51 15 receipt_confimration.exe 5 6->15         started        19 receipt_confimration.exe 6->19         started        53 Antivirus detection for dropped file 11->53 55 Multi AV Scanner detection for dropped file 11->55 57 Machine Learning detection for dropped file 11->57 21 Vpvysmb.exe 11->21         started        23 Vpvysmb.exe 13->23         started        file5 signatures6 process7 dnsIp8 39 194.55.224.8 LVLT-10753US Germany 15->39 41 3.144.0.157 AMAZON-02US United States 15->41 25 C:\Users\user\AppData\Local\Temp\yyoovi.exe, PE32 15->25 dropped 27 C:\Users\user\AppData\Local\Temp\jfcuka.exe, PE32 15->27 dropped file9
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/8bf39c82088d376f612259550f253fe8c6a5a747de4c4b7b22077f47dd321ffe/
Threat name:
Win32.Backdoor.Xworm
Create hunting rule
Status:
Suspicious
First seen:
2023-05-10 19:57:51 UTC
File Type:
PE (.Net Exe)
Extracted files:
3
AV detection:
21 of 36 (58.33%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=rpzzzaqiru3w6yjclfkq6jj75ddklj2h3zgew6zca57upxjsd77a._file
Verdict:
malicious
Similar samples:
3736badc4fddcf105a89c5cc006d2d4e248bb89ffcf74401e0b2e14cad585ccc
NanoCore
3a60b811771921ba75cd82dedb4c98b15419e2487ac00ba78ca7d19b04a3747c
NanoCore
43a5329fe9f6d43a4de5875d0fe039a056f10a1887a52ad0acd11863587b9204
NanoCore
6a57e513b61e8a308a00109c55555b710dcaa64629a25982ddcf3c4433fed248
NanoCore
6f87506ad54bd39f08b8f3da216f4f31713377aa512b32628c2ef53162b222ff
NanoCore
72608223bb6b1ef8d577f7302a5c63ada4976971ba0400fb0d01b296a0b2fba6
NanoCore
7640591719da5ed087f6006a0dff2ca19b6f76533e95554222f04b4fe3f93ded
NanoCore
82262b52863a6474fb05fa3c28f90e435d4319f7da43b865a58eb24d1b78f37e
NanoCore
84c18f78f11b9bc3fd3e96925d2a7b76ab5ecfb927c377ad27456e191815b24a
NanoCore
91dff7bab30d0d6713ba56c522859ce8f773611c10ec7a7e7a0d9889612d0641
NanoCore
+ 80 additional samples on MalwareBazaar
Result
Malware family:
xworm
Create hunting rule
Score:
  10/10
Tags:
family:xworm persistence rat trojan
Link:
https://tria.ge/reports/230511-aawhhscf4y/
Behaviour
Suspicious behavior: EnumeratesProcesses
Suspicious use of AdjustPrivilegeToken
Suspicious use of SetWindowsHookEx
Suspicious use of WriteProcessMemory
Suspicious use of SetThreadContext
Adds Run key to start application
Downloads MZ/PE file
Xworm
Malware Config
C2 Extraction:
xwormpeople.duckdns.org:7000
Unpacked files
SH256 hash:
ff8c24bce1eb009f0d5c47a09b96caf02726c285cea0d635082ad4da27e63d1b
MD5 hash:
9d6ec6072ee1814a4a01d1eb3fb67ba1
SHA1 hash:
d0b416de1c900b6bcb35dc182b2e8744f16c3289
Link:
https://www.unpac.me/results/7bff997e-96d0-4a8b-8ec4-78f4c602b694/
SH256 hash:
d3e3e467528d65c6f7ddccd0a6b6e680af87b3f6e96af00f0dd959392f615575
MD5 hash:
40e4f06fa4e1ea54fc8a8840ecfd51ee
SHA1 hash:
96ce98d738151dc41ad9436d0ddd63284fe0d197
Link:
https://www.unpac.me/results/7bff997e-96d0-4a8b-8ec4-78f4c602b694/
SH256 hash:
8bf39c82088d376f612259550f253fe8c6a5a747de4c4b7b22077f47dd321ffe
MD5 hash:
dab2b15e2a666145f861832443fba057
SHA1 hash:
c075e5ed70ae9b54aabbd63520beeb2da03a6fd1
Link:
https://www.unpac.me/results/7bff997e-96d0-4a8b-8ec4-78f4c602b694/
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/8bf39c82088d/report/overview.html
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Suspicious File
Score:
0.65
Link:
https://yomi.yoroi.company/submissions/8bf39c82088d376f612259550f253fe8c6a5a747de4c4b7b22077f47dd321ffe

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:BitcoinAddress
Create hunting rule
Author:Didier Stevens (@DidierStevens)
Description:Contains a valid Bitcoin address
Rule name:INDICATOR_SUSPICIOUS_EXE_NoneWindowsUA
Create hunting rule
Author:ditekSHen
Description:Detects Windows executables referencing non-Windows User-Agents
Rule name:MALWARE_Win_AsyncRAT
Create hunting rule
Author:ditekSHen
Description:Detects AsyncRAT
Rule name:pe_imphash
Create hunting rule
Rule name:Skystars_Malware_Imphash
Create hunting rule
Author:Skystars LightDefender
Description:imphash
Rule name:SUSP_DOTNET_PE_List_AV
Create hunting rule
Author:SECUINFRA Falcon Team
Description:Detecs .NET Binary that lists installed AVs

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/388299/

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