MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 51f3a9f7ba793e867b3738a3f2707d11d3d839a099a70d6bb02c6b6aa68de4c8. 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: 8


Intelligence 8 IOCs YARA 3 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 51f3a9f7ba793e867b3738a3f2707d11d3d839a099a70d6bb02c6b6aa68de4c8
SHA3-384 hash: a10ce5121e88940c50adfa824189e2d988747f21807b0090785387ce79b91a8a9f8ed502b9b6bccdac68bf339a9a34e4
SHA1 hash: d76661c5941406a6aa251607ee5737f2410b1617
MD5 hash: 9d87b8e88fdf504fed31ee9f15b802c2
humanhash: may-echo-skylark-nevada
File name:Request for quotation PR 1100076872.exe
Download: download sample
Signature AgentTesla
Create hunting rule
File size:731'136 bytes
First seen:2020-08-03 13:56:46 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'649 x AgentTesla, 19'461 x Formbook, 12'202 x SnakeKeylogger)
ssdeep 12288:G/ZwPLtfhlI68kADCo4OSkTaswyyNZ+E0i4mwjRqkI9f3Eyy1Z:WZglZmDz5basqhL5wjRqyy
Threatray 10'869 similar samples on MalwareBazaar
TLSH 8BF4CE5C3BE0862AF55A0FBA9C3651439D38F84B6917F38F2AF5122C487A79C6C41F52
Reporter abuse_ch
Tags:AgentTesla exe


Avatar
abuse_ch
Malspam distributing AgentTesla:

HELO: blinux.thesecurededicatedserver.com
Sending IP: 198.52.104.94
From: PUNIT GIRISHBHAI KALARIYA-PROC-KURANGA <punit.kalariya@rsplgroup.com>
Reply-To: info@rsplgroup.com
Subject: Request for quotation | PR 1100076872
Attachment: Request for quotation PR 1100076872.rar (contains "Request for quotation PR 1100076872.exe")

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

Intelligence

File Origin
# of uploads :
1
# of downloads :
73
Origin country :
n/a
Vendor Threat Intelligence
Detection:
n/a
Link:
https://www.capesandbox.com/analysis/37924/
Result
Verdict:
Malware
Maliciousness:

Behaviour
Creating a window
Sending a UDP request
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
Result
Threat name:
AgentTesla
Create hunting rule
Detection:
malicious
Classification:
troj.spyw.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/408076
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
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: 256289 Sample: Request for quotation  PR 1... Startdate: 03/08/2020 Architecture: WINDOWS Score: 100 63 Snort IDS alert for network traffic (e.g. based on Emerging Threat rules) 2->63 65 Found malware configuration 2->65 67 Sigma detected: Scheduled temp file as task from temp location 2->67 69 9 other signatures 2->69 7 newapp.exe 3 2->7         started        10 Request for quotation  PR 1100076872.exe 7 2->10         started        14 newapp.exe 2->14         started        process3 dnsIp4 71 Queries sensitive network adapter information (via WMI, Win32_NetworkAdapter, often done to detect virtual machines) 7->71 73 Machine Learning detection for dropped file 7->73 75 Queries sensitive BIOS Information (via WMI, Win32_Bios & Win32_BaseBoard, often done to detect virtual machines) 7->75 16 newapp.exe 2 7->16         started        20 newapp.exe 7->20         started        51 192.168.2.1 unknown unknown 10->51 35 C:\Users\user\AppData\...\&startupname&.exe, PE32 10->35 dropped 37 C:\Users\user\AppData\Local\...\tmp87A1.tmp, XML 10->37 dropped 39 C:\...\&startupname&.exe:Zone.Identifier, ASCII 10->39 dropped 41 Request for quotat... 1100076872.exe.log, ASCII 10->41 dropped 77 Injects a PE file into a foreign processes 10->77 22 Request for quotation  PR 1100076872.exe 2 5 10->22         started        25 schtasks.exe 1 10->25         started        27 newapp.exe 14->27         started        file5 signatures6 process7 dnsIp8 43 208.91.198.143, 49711, 587 PUBLIC-DOMAIN-REGISTRYUS United States 16->43 45 smtp.blueskypaclficgroup.com 16->45 53 Tries to harvest and steal Putty / WinSCP information (sessions, passwords, etc) 16->53 55 Tries to steal Mail credentials (via file access) 16->55 57 Tries to harvest and steal ftp login credentials 16->57 59 Tries to harvest and steal browser information (history, passwords, etc) 16->59 47 smtp.blueskypaclficgroup.com 22->47 49 us2.smtp.mailhostbox.com 208.91.199.224, 49710, 587 PUBLIC-DOMAIN-REGISTRYUS United States 22->49 31 C:\Users\user\AppData\Roaming\...\newapp.exe, PE32 22->31 dropped 33 C:\Users\user\...\newapp.exe:Zone.Identifier, ASCII 22->33 dropped 61 Hides that the sample has been downloaded from the Internet (zone.identifier) 22->61 29 conhost.exe 25->29         started        file9 signatures10 process11
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/51f3a9f7ba793e867b3738a3f2707d11d3d839a099a70d6bb02c6b6aa68de4c8/
Threat name:
ByteCode-MSIL.Trojan.Kryptik
Create hunting rule
Status:
Malicious
First seen:
2020-08-03 13:58:21 UTC
AV detection:
23 of 29 (79.31%)
Threat level:
  5/5
Detection(s):
Malicious file
Link:
https://check.spamhaus.org/check/?searchterm=khz2t552pe7im6zxhcr7e4d5chj5qonatgtq225qfrvwvjun4tea._file
Verdict:
malicious
Label(s):
agenttesla
Create hunting rule
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AgentTesla
+ 10'859 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/200803-m62mdk3tkj/
Behaviour
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
Suspicious behavior: EnumeratesProcesses
Creates scheduled task(s)
Suspicious use of SetThreadContext
Adds Run key to start application
Reads data files stored by FTP clients
Reads user/profile data of web browsers
Reads user/profile data of local email clients
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/51f3a9f7ba793e867b3738a3f2707d11d3d839a099a70d6bb02c6b6aa68de4c8

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 a728bb818978f8782837b4042837b2782c57c75d5b05c236c566b29f3407876d

AgentTesla

Executable exe 51f3a9f7ba793e867b3738a3f2707d11d3d839a099a70d6bb02c6b6aa68de4c8

(this sample)

  
Dropped by
MD5 665bf7a75711201e97197b04fe5403f8
  
Delivery method
Distributed via e-mail attachment
Cape
Cape
https://www.capesandbox.com/analysis/37924/
  
Dropped by
SHA256 a728bb818978f8782837b4042837b2782c57c75d5b05c236c566b29f3407876d

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