MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 e639997f6ee7e96b1356622bc3f5449e8ce3aeb46100e775875cc41cc891d587. 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: 9


Intelligence 9 IOCs YARA 3 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: e639997f6ee7e96b1356622bc3f5449e8ce3aeb46100e775875cc41cc891d587
SHA3-384 hash: e41153542043c5bb2467043958eca5efe0698ffeca9a3335e91366b4960a28ce944724991a7d9c2788db9037bff5c68f
SHA1 hash: e841fb3eba9a89b5154a93e07f2df6f6cd47906a
MD5 hash: 35fe56c5cc7497630f6161c1f86d998a
humanhash: delta-timing-massachusetts-arizona
File name:t_6OuAvd.txt
Download: download sample
Signature AgentTesla
Create hunting rule
File size:804'864 bytes
First seen:2020-08-31 07:24:14 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'663 x AgentTesla, 19'478 x Formbook, 12'208 x SnakeKeylogger)
ssdeep 6144:sUZYZWBXFXfMrKmcRQRQm/l2v95KNQPB95gB53SU14VPIp6ezfQ3M9gavjgDXu17:sLxdQSlI95KNQ+Rj1HfQc9rAu1
Threatray 188 similar samples on MalwareBazaar
TLSH EA0528383AC25815EA3D493140B84ED2A730A2863A42CB5F79DF8B6C5F03A8F7F5559D
Reporter abuse_ch
Tags:AgentTesla exe


Avatar
abuse_ch
Malspam distributing AgentTesla:

HELO: srv13.joy-travels.com
Sending IP: 103.35.120.165
From: Toko Kaiun Kaisha, Ltd <aralinahabi@gmail.com>
Subject: Official Purchase Order P.O. Material Requirements
Attachment: 2506719.xls

AgentTesla payload URL:
https://s3.rokket.space/t_6OuAvd.txt

AgentTesla SMTP exfil server:
smtp.yandex.com:587

Intelligence

File Origin
# of uploads :
1
# of downloads :
80
Origin country :
n/a
Vendor Threat Intelligence
Detection:
Ispy
Create hunting rule
Link:
https://www.capesandbox.com/analysis/53291/
Detection(s):
SecuriteInfo.com.Generic.mg.35fe56c5cc749763.13346.UNOFFICIAL
Create hunting rule

Result
Verdict:
Malware
Maliciousness:

Behaviour
Creating a window
Sending a UDP request
Creating a file in the %temp% directory
Running batch commands
Launching a process
Creating a file
Creating a process from a recently created file
Enabling autorun with the standard Software\Microsoft\Windows\CurrentVersion\Run registry branch
Unauthorized injection to a recently created process
Result
Threat name:
AgentTesla
Create hunting rule
Detection:
malicious
Classification:
troj.evad
Score:
96 / 100
Link:
https://www.joesandbox.com/analysis/454965
Signature
.NET source code contains very large array initializations
Allocates memory in foreign processes
Creates an autostart registry key pointing to binary in C:\Windows
Drops PE files to the user root directory
Injects a PE file into a foreign processes
Machine Learning detection for dropped file
Machine Learning detection for sample
Multi AV Scanner detection for dropped file
Multi AV Scanner detection for submitted file
Writes to foreign memory regions
Yara detected AgentTesla
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 signatures2 2 Behavior Graph ID: 279855 Sample: t_6OuAvd.txt Startdate: 31/08/2020 Architecture: WINDOWS Score: 96 37 Multi AV Scanner detection for submitted file 2->37 39 Yara detected AgentTesla 2->39 41 .NET source code contains very large array initializations 2->41 43 Machine Learning detection for sample 2->43 7 t_6OuAvd.exe 7 2->7         started        11 pcalua.exe 1 2->11         started        13 pcalua.exe 1 1 2->13         started        process3 file4 29 C:\Users\user\mghd.exe, PE32 7->29 dropped 31 C:\Users\user\AppData\...\InstallUtil.exe, PE32 7->31 dropped 33 C:\Users\user\mghd.exe:Zone.Identifier, ASCII 7->33 dropped 35 C:\Users\user\AppData\...\t_6OuAvd.exe.log, ASCII 7->35 dropped 45 Drops PE files to the user root directory 7->45 15 mghd.exe 2 7->15         started        18 cmd.exe 1 7->18         started        20 mghd.exe 3 11->20         started        signatures5 process6 signatures7 49 Writes to foreign memory regions 15->49 51 Allocates memory in foreign processes 15->51 53 Injects a PE file into a foreign processes 15->53 22 InstallUtil.exe 2 15->22         started        24 reg.exe 1 1 18->24         started        27 conhost.exe 18->27         started        55 Multi AV Scanner detection for dropped file 20->55 57 Machine Learning detection for dropped file 20->57 process8 signatures9 47 Creates an autostart registry key pointing to binary in C:\Windows 24->47
Detection:
agenttesla
Create hunting rule
Link:
https://mwdb.cert.pl/sample/e639997f6ee7e96b1356622bc3f5449e8ce3aeb46100e775875cc41cc891d587/
Threat name:
ByteCode-MSIL.Trojan.Kryptik
Create hunting rule
Status:
Malicious
First seen:
2020-08-31 07:12:09 UTC
AV detection:
22 of 28 (78.57%)
Threat level:
  5/5
Detection(s):
Malicious file
Link:
https://check.spamhaus.org/check/?searchterm=4y4zs73o47uwwe2wmiv4h5ket2gohlvumeaoo5mhltcbzser2wdq._file
Verdict:
unknown
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10070ec7d3520c0f11223b9602b0d78c066eaa6b56193385d39346838669c50a
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6b5f4379addadad8b1e36688cc5902bc8488ac88d3d7390924a6565cf78a3ae9
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a3787a9441ea35eac690866b22a7fd4499e39c78f2eeff4d0306d197e73b9d1e
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b0e6043127c164a93905b6baa2ec2ee5fc0691ca1df15db962cc0d55c5b35151
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bf0d1bf23351a82eddca116c85801b4d1bbe328933e729c735226f9563432544
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bf7bdc6825c2f863095795d10195f76265c5a062850ebc4b40ff0a51f62365e8
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AgentTesla
+ 178 additional samples on MalwareBazaar
Result
Malware family:
agenttesla
Create hunting rule
Score:
  10/10
Tags:
agilenet keylogger stealer persistence spyware trojan family:agenttesla
Link:
https://tria.ge/reports/200831-avjmtwhrts/
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
Loads dropped DLL
Obfuscated with Agile.Net obfuscator
Reads data files stored by FTP clients
Reads user/profile data of local email clients
Reads user/profile data of web browsers
Executes dropped EXE
AgentTesla Payload
AgentTesla
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Kryptik
Score:
1.00
Link:
https://yomi.yoroi.company/submissions/e639997f6ee7e96b1356622bc3f5449e8ce3aeb46100e775875cc41cc891d587

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:Agenttesla_type2
Create hunting rule
Author:JPCERT/CC Incident Response Group
Description:detect Agenttesla in memory
Reference:internal research
Rule name:CAP_HookExKeylogger
Create hunting rule
Author:Brian C. Bell -- @biebsmalwareguy
Reference:https://github.com/DFIRnotes/rules/blob/master/CAP_HookExKeylogger.yar
Rule name:win_agent_tesla_w1
Create hunting rule
Author:govcert_ch
Description:Detect Agent Tesla based on common .NET code sequences

File information

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

Malspam

AgentTesla

Excel file xls 10ad4414cfcf4191c1d1917f5eaa3ea7bcc4e7d15845dcc97c047a4bf8ee3f55

AgentTesla

Executable exe e639997f6ee7e96b1356622bc3f5449e8ce3aeb46100e775875cc41cc891d587

(this sample)

  
URLhaus
https://urlhaus.abuse.ch/url/447206/
  
Dropped by
MD5 1f3aa316eb26f9523e03a8b5010a4119
  
Dropped by
SHA256 10ad4414cfcf4191c1d1917f5eaa3ea7bcc4e7d15845dcc97c047a4bf8ee3f55
  
Delivery method
Distributed via web download
Cape
Cape
https://www.capesandbox.com/analysis/53291/

Comments