MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 b71b1e0152b7112c6ad660c51751d19bf245fb7739c605c9389909fa4c721d06. 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: b71b1e0152b7112c6ad660c51751d19bf245fb7739c605c9389909fa4c721d06
SHA3-384 hash: eb37483296975105472407062da784da4e2b5480be8540700dc3dd1b23b0dc77daa4d2b1ab7e23d5f33980bba676704b
SHA1 hash: 1e20913ef95f1c4d5caf3303d8bf801c4c67a282
MD5 hash: 3f73b15910602527769c517af7b5e7b9
humanhash: johnny-beryllium-arizona-lemon
File name:payment details.exe
Download: download sample
Signature AgentTesla
Create hunting rule
File size:549'888 bytes
First seen:2020-08-17 06:37:08 UTC
Last seen:2020-08-17 08:27:43 UTC
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'650 x AgentTesla, 19'462 x Formbook, 12'203 x SnakeKeylogger)
ssdeep 12288:in4EcmZHAFaxmVmie9bngPsOYuHsX9xArmDncHnCrxfbB0IdfR4gU0r/KtDb:K4EcmZHAFaxmVmie9bngPsOYuMtKwLlU
Threatray 10'564 similar samples on MalwareBazaar
TLSH 27C48B5A38D0E3DED4E64FB858549C1623FB2F2E01169A0F9C6B39D363E8BC1BD24456
Reporter abuse_ch
Tags:AgentTesla exe


Avatar
abuse_ch
Malspam distributing AgentTesla:

HELO: properso.com
Sending IP: 62.210.157.138
From: frankbicrossing <frankbicrossing@china.com>
Subject: payment For Outstanding Invoices
Attachment: payment details.rar (contains "payment details.exe")

AgentTesla SMTP exfil server:
mail.varda.com.tr:587

AgentTesla SMTP exfil email address:
info@varda.com.tr

Intelligence

File Origin
# of uploads :
2
# of downloads :
71
Origin country :
n/a
Vendor Threat Intelligence
Detection:
n/a
Link:
https://www.capesandbox.com/analysis/46698/
Detection(s):
SecuriteInfo.com.Artemis3F73B1591060.21169.UNOFFICIAL
Create hunting rule

Result
Verdict:
Malware
Maliciousness:

Behaviour
Creating a window
Sending a UDP request
Creating a file in the %AppData% directory
Creating a file in the %temp% directory
Launching a process
Creating a process with a hidden window
Deleting a recently created file
Unauthorized injection to a recently created process
Creating a file
Using the Windows Management Instrumentation requests
Enabling autorun by creating a file
Result
Threat name:
AgentTesla
Create hunting rule
Detection:
malicious
Classification:
troj.adwa.spyw.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/432650
Signature
Found malware configuration
Hides that the sample has been downloaded from the Internet (zone.identifier)
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
Modifies the hosts file
Queries sensitive BIOS Information (via WMI, Win32_Bios & Win32_BaseBoard, often done to detect virtual machines)
Queries sensitive network adapter information (via WMI, Win32_NetworkAdapter, often done to detect virtual machines)
Sigma detected: Scheduled temp file as task from temp location
Snort IDS alert for network traffic (e.g. based on Emerging Threat rules)
Tries to detect sandboxes and other dynamic analysis tools (process name or module or function)
Tries to harvest and steal browser information (history, passwords, etc)
Tries to harvest and steal ftp login credentials
Tries to harvest and steal Putty / WinSCP information (sessions, passwords, etc)
Tries to steal Mail credentials (via file access)
Uses schtasks.exe or at.exe to add and modify task schedules
Yara detected AgentTesla
Yara detected AntiVM_3
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 signatures2 2 Behavior Graph ID: 268625 Sample: payment details.exe Startdate: 17/08/2020 Architecture: WINDOWS Score: 100 65 Snort IDS alert for network traffic (e.g. based on Emerging Threat rules) 2->65 67 Found malware configuration 2->67 69 Sigma detected: Scheduled temp file as task from temp location 2->69 71 9 other signatures 2->71 8 payment details.exe 7 2->8         started        12 sRfDVrD.exe 4 2->12         started        14 sRfDVrD.exe 5 2->14         started        process3 file4 51 C:\Users\user\AppData\Roaming\KxUsFALF.exe, PE32 8->51 dropped 53 C:\Users\...\KxUsFALF.exe:Zone.Identifier, ASCII 8->53 dropped 55 C:\Users\user\AppData\Local\...\tmpC134.tmp, XML 8->55 dropped 57 C:\Users\user\...\payment details.exe.log, ASCII 8->57 dropped 85 Injects a PE file into a foreign processes 8->85 16 payment details.exe 2 5 8->16         started        21 schtasks.exe 1 8->21         started        23 sRfDVrD.exe 12->23         started        25 schtasks.exe 12->25         started        87 Queries sensitive network adapter information (via WMI, Win32_NetworkAdapter, often done to detect virtual machines) 14->87 89 Machine Learning detection for dropped file 14->89 91 Queries sensitive BIOS Information (via WMI, Win32_Bios & Win32_BaseBoard, often done to detect virtual machines) 14->91 27 schtasks.exe 1 14->27         started        29 sRfDVrD.exe 14->29         started        31 sRfDVrD.exe 14->31         started        33 sRfDVrD.exe 14->33         started        signatures5 process6 dnsIp7 59 varda.com.tr 5.2.84.160, 49749, 587 ALASTYRTR Turkey 16->59 61 mail.varda.com.tr 16->61 45 C:\Users\user\AppData\Roaming\...\sRfDVrD.exe, PE32 16->45 dropped 47 C:\Windows\System32\drivers\etc\hosts, ASCII 16->47 dropped 49 C:\Users\user\...\sRfDVrD.exe:Zone.Identifier, ASCII 16->49 dropped 73 Tries to harvest and steal Putty / WinSCP information (sessions, passwords, etc) 16->73 75 Tries to steal Mail credentials (via file access) 16->75 77 Modifies the hosts file 16->77 35 reg.exe 16->35         started        37 conhost.exe 21->37         started        63 mail.varda.com.tr 23->63 79 Tries to harvest and steal ftp login credentials 23->79 81 Tries to harvest and steal browser information (history, passwords, etc) 23->81 83 Hides that the sample has been downloaded from the Internet (zone.identifier) 23->83 39 conhost.exe 25->39         started        41 conhost.exe 27->41         started        file8 signatures9 process10 process11 43 conhost.exe 35->43         started       
Detection:
agenttesla
Create hunting rule
Link:
https://mwdb.cert.pl/sample/b71b1e0152b7112c6ad660c51751d19bf245fb7739c605c9389909fa4c721d06/
Threat name:
ByteCode-MSIL.Trojan.AgentTesla
Create hunting rule
Status:
Malicious
First seen:
2020-08-17 02:01:59 UTC
AV detection:
24 of 29 (82.76%)
Threat level:
  5/5
Detection(s):
Malicious file
Link:
https://check.spamhaus.org/check/?searchterm=w4nr4aksw4isy2wwmdcrouortpzel63xhhdalsjytee7utdsduda._file
Verdict:
malicious
Label(s):
agenttesla
Create hunting rule
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AgentTesla
+ 10'554 additional samples on MalwareBazaar
Result
Malware family:
agenttesla
Create hunting rule
Score:
  10/10
Tags:
keylogger stealer persistence spyware trojan family:agenttesla
Link:
https://tria.ge/reports/200817-ad67w98g8a/
Behaviour
Creates scheduled task(s)
Modifies registry key
Suspicious behavior: EnumeratesProcesses
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
Suspicious use of SetThreadContext
Adds Run key to start application
Reads data files stored by FTP clients
Reads user/profile data of local email clients
Reads user/profile data of web browsers
Drops file in Drivers directory
AgentTesla Payload
AgentTesla
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Suspicious File
Score:
0.61
Link:
https://yomi.yoroi.company/submissions/b71b1e0152b7112c6ad660c51751d19bf245fb7739c605c9389909fa4c721d06

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

rar c8c504b0ab4bedf3d63a2c910a2ff76944208a646b3e9fce8f961420b5099268

AgentTesla

Executable exe b71b1e0152b7112c6ad660c51751d19bf245fb7739c605c9389909fa4c721d06

(this sample)

  
Dropped by
MD5 948e1efd1c372a8198824a84c8d45521
  
Delivery method
Distributed via e-mail attachment
Cape
Cape
https://www.capesandbox.com/analysis/46698/
  
Dropped by
SHA256 c8c504b0ab4bedf3d63a2c910a2ff76944208a646b3e9fce8f961420b5099268

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