MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 6aa3c5b34da4f5beab6341a6a3a289089a305c24f90c6504f6816467bed39143. 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


AgentTesla


Vendor detections: 7


Intelligence 7 IOCs YARA 6 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 6aa3c5b34da4f5beab6341a6a3a289089a305c24f90c6504f6816467bed39143
SHA3-384 hash: 6610b9c4c6068ffe8c98a19c4e454d1b2bf85fb615c0ca479dbb016e997ebac5e6374af7d6cefea16b8aff23e886befb
SHA1 hash: fd2d41436d529f07ac7346df8f70a962c9ee3d9a
MD5 hash: 06b0dd6666542b8542fff55e24163c0a
humanhash: butter-pip-fish-snake
File name:98880.xls
Download: download sample
Signature AgentTesla
Create hunting rule
File size:335'360 bytes
First seen:2020-10-19 11:01:18 UTC
Last seen:Never
File type:Excel file xls
MIME type:application/vnd.ms-excel
ssdeep 6144:5k3hOdsylKlgryzc4bNhZF+E+W2knG4BCV0zvoHabGXxRkaRpZmqJQvwgmUBO0q+:t4k00HabGhWapLQPm2dqtqzVLKrcpGk2
TLSH CC6412E372C00E0AD83D97BD5A2B57415231FCD1AEB3821EAB66F70567727C0895329B
Reporter abuse_ch
Tags:AgentTesla xls


Avatar
abuse_ch
Malspam distributing AgentTesla:

From: "Paul Gbush " <ops2@olivetravellounge.com>
Reply-To: chukisa22@gmail.com
Subject: Re: SHIPPING REQUEST
Attachment: 98880.xls

AgentTesla payload URL:
http://weeshoppi.com/wp-includes/ID3/g1/98880.jpg

Intelligence

File Origin
# of uploads :
1
# of downloads :
89
Origin country :
n/a
Vendor Threat Intelligence
Result
Verdict:
Malware
Maliciousness:

Behaviour
Creating a window
Using the Windows Management Instrumentation requests
Bypassing of proactive protection methods using Windows Management Instrumentation (WMI)
Launching a process by exploiting the app vulnerability
Result
Threat name:
AgentTesla
Create hunting rule
Detection:
malicious
Classification:
evad.troj
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/495311
Signature
.NET source code contains very large array initializations
Antivirus detection for URL or domain
Bypasses PowerShell execution policy
Creates an autostart registry key pointing to binary in C:\Windows
Creates processes via WMI
Downloads files with wrong headers with respect to MIME Content-Type
Drops PE files to the user root directory
Machine Learning detection for dropped file
Multi AV Scanner detection for submitted file
Office document tries to convince victim to disable security protection (e.g. to enable ActiveX or Macros)
Powershell drops PE file
Sigma detected: Executables Started in Suspicious Folder
Sigma detected: Execution in Non-Executable Folder
Sigma detected: Suspicious Program Location Process Starts
Suspicious powershell command line found
Tries to detect virtualization through RDTSC time measurements
Yara detected AgentTesla
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 signatures2 2 Behavior Graph ID: 300105 Sample: 98880.xls Startdate: 19/10/2020 Architecture: WINDOWS Score: 100 46 Antivirus detection for URL or domain 2->46 48 Multi AV Scanner detection for submitted file 2->48 50 Office document tries to convince victim to disable security protection (e.g. to enable ActiveX or Macros) 2->50 52 9 other signatures 2->52 8 powershell.exe 14 20 2->8         started        13 pcalua.exe 1 2->13         started        15 EXCEL.EXE 31 25 2->15         started        17 pcalua.exe 1 1 2->17         started        process3 dnsIp4 44 weeshoppi.com 207.180.212.51, 49734, 80 CONTABODE Germany 8->44 42 C:\Users\Public\Documents\jaecyyv.exe, Unknown 8->42 dropped 60 Powershell drops PE file 8->60 19 jaecyyv.exe 8 8->19         started        23 conhost.exe 8->23         started        25 iugsd.exe 3 13->25         started        file5 signatures6 process7 file8 36 C:\Users\user\iugsd.exe, PE32 19->36 dropped 38 C:\Users\user\AppData\Local\Temp\...\Xxl.dll, PE32 19->38 dropped 40 C:\Users\user\AppData\Local\Temp\RegAsm.exe, PE32 19->40 dropped 54 Machine Learning detection for dropped file 19->54 56 Drops PE files to the user root directory 19->56 58 Tries to detect virtualization through RDTSC time measurements 19->58 27 cmd.exe 1 19->27         started        29 iugsd.exe 2 19->29         started        signatures9 process10 process11 31 reg.exe 1 1 27->31         started        34 conhost.exe 27->34         started        signatures12 62 Creates an autostart registry key pointing to binary in C:\Windows 31->62
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/6aa3c5b34da4f5beab6341a6a3a289089a305c24f90c6504f6816467bed39143/
Threat name:
Script-Macro.Downloader.Bynoco
Create hunting rule
Status:
Malicious
First seen:
2020-10-19 10:40:31 UTC
AV detection:
19 of 29 (65.52%)
Threat level:
  3/5
Detection(s):
Malicious file
Link:
https://check.spamhaus.org/check/?searchterm=nkr4lm2nut235k3digtkhiujbcndaxbe7eggkbhwqfsgppwtsfbq._file
Result
Malware family:
agenttesla
Create hunting rule
Score:
  10/10
Tags:
keylogger trojan stealer spyware family:agenttesla persistence
Link:
https://tria.ge/reports/201019-4hzewhdxtj/
Behaviour
Suspicious behavior: AddClipboardFormatListener
Suspicious behavior: EnumeratesProcesses
Suspicious use of AdjustPrivilegeToken
Suspicious use of SetWindowsHookEx
Suspicious use of WriteProcessMemory
Checks processor information in registry
Enumerates system info in registry
Office loads VBA resources, possible macro or embedded object present
Drops file in System32 directory
Suspicious use of SetThreadContext
Adds Run key to start application
Looks up external IP address via web service
Loads dropped DLL
Reads data files stored by FTP clients
Reads user/profile data of local email clients
Reads user/profile data of web browsers
Blacklisted process makes network request
Executes dropped EXE
AgentTesla
Process spawned unexpected child process
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/6aa3c5b34da4f5beab6341a6a3a289089a305c24f90c6504f6816467bed39143

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:Email_stealer_bin_mem
Create hunting rule
Author:James_inthe_box
Description:Email in files like avemaria
Rule name:IPPort_combo_mem
Create hunting rule
Author:James_inthe_box
Description:IP and port combo
Rule name:PowerShell_in_Word_Doc
Create hunting rule
Author:Florian Roth
Description:Detects a powershell and bypass keyword in a Word document
Reference:Internal Research - ME
Rule name:Select_from_enumeration
Create hunting rule
Author:James_inthe_box
Description:IP and port combo
Rule name:SharedStrings
Create hunting rule
Author:Katie Kleemola
Description:Internal names found in LURK0/CCTV0 samples
Rule name:UAC_bypass_bin_mem
Create hunting rule
Author:James_inthe_box
Description:UAC bypass in files like avemaria

File information

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

Malspam

AgentTesla

Excel file xls 6aa3c5b34da4f5beab6341a6a3a289089a305c24f90c6504f6816467bed39143

(this sample)

  
URLhaus
https://urlhaus.abuse.ch/url/717239/
  
Delivery method
Distributed via e-mail attachment

Comments