MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 c5b7a21aec63cb037d441c6e850b500567b1937c21e4f842fbf73930a6ec62a4. 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: c5b7a21aec63cb037d441c6e850b500567b1937c21e4f842fbf73930a6ec62a4
SHA3-384 hash: 74d90eed12be58775e09d17f2524474575c018e8a5b44417aa11cb46a20ec3447c66f548ede8d6aab944b1cb6e3d144d
SHA1 hash: d45e32a51a68232f176d28b8ca9f354eff2a93ca
MD5 hash: 47cdfecf3738317d1200ddaa26d0ba09
humanhash: mississippi-mockingbird-fish-michigan
File name:PO# 200800017.exe
Download: download sample
Signature AgentTesla
Create hunting rule
File size:827'904 bytes
First seen:2020-08-04 07:01:20 UTC
Last seen:2020-08-04 12:55:47 UTC
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'652 x AgentTesla, 19'462 x Formbook, 12'204 x SnakeKeylogger)
ssdeep 12288:L6HcPgYxmOE+2Do4pPeRH89f8jFvkoCkWowfhK8OqaI+qWSTXxoaLKgpDV:fIYxPeVZlqRHVWowyAvTXxoazZV
Threatray 10'637 similar samples on MalwareBazaar
TLSH E905BEC6E5408E50EC294A3F8D3389924B33AC5BEF425606349CFA557BF31966A35F83
Reporter abuse_ch
Tags:AgentTesla exe


Avatar
abuse_ch
Malspam distributing AgentTesla:

HELO: novamed.com.pk
Sending IP: 37.49.224.50
From: m.ahmad@novamed.com.pk
Subject: PO# 200800017
Attachment: PO 200800017.zip (contains "PO# 200800017.exe")

AgentTesla SMTP exfil server:
smtp.bnb-spa.com:587

Intelligence

File Origin
# of uploads :
3
# of downloads :
63
Origin country :
n/a
Vendor Threat Intelligence
Detection:
n/a
Link:
https://www.capesandbox.com/analysis/38242/
Detection(s):
SecuriteInfo.com.Trojan.Siggen10.163.31374.9179.UNOFFICIAL
Create hunting rule

Result
Verdict:
Malware
Maliciousness:

Behaviour
Sending a UDP request
Creating a window
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
Result
Threat name:
AgentTesla
Create hunting rule
Detection:
malicious
Classification:
troj.spyw.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/408733
Signature
Contains functionality to check if a debugger is running (CheckRemoteDebuggerPresent)
Contains functionality to register a low level keyboard hook
Hides that the sample has been downloaded from the Internet (zone.identifier)
Initial sample is a PE file and has a suspicious name
Installs a global keyboard hook
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
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 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: 256610 Sample: PO# 200800017.exe Startdate: 04/08/2020 Architecture: WINDOWS Score: 100 57 Sigma detected: Scheduled temp file as task from temp location 2->57 59 Yara detected AgentTesla 2->59 61 Yara detected AntiVM_3 2->61 63 8 other signatures 2->63 7 PO# 200800017.exe 5 2->7         started        10 Mymp4.exe 2 2->10         started        12 Mymp4.exe 3 2->12         started        process3 file4 35 C:\Users\user\AppData\...\&startupname&.exe, PE32 7->35 dropped 37 C:\...\&startupname&.exe:Zone.Identifier, ASCII 7->37 dropped 39 C:\Users\user\AppData\Local\...\tmpDADC.tmp, XML 7->39 dropped 41 C:\Users\user\...\PO# 200800017.exe.log, ASCII 7->41 dropped 15 PO# 200800017.exe 2 5 7->15         started        19 schtasks.exe 1 7->19         started        21 Mymp4.exe 10->21         started        23 schtasks.exe 10->23         started        65 Queries sensitive network adapter information (via WMI, Win32_NetworkAdapter, often done to detect virtual machines) 12->65 67 Machine Learning detection for dropped file 12->67 69 Queries sensitive BIOS Information (via WMI, Win32_Bios & Win32_BaseBoard, often done to detect virtual machines) 12->69 71 Contains functionality to check if a debugger is running (CheckRemoteDebuggerPresent) 12->71 25 schtasks.exe 1 12->25         started        27 Mymp4.exe 2 12->27         started        signatures5 process6 file7 43 C:\Users\user\AppData\Roaming\...\Mymp4.exe, PE32 15->43 dropped 45 C:\Users\user\...\Mymp4.exe:Zone.Identifier, ASCII 15->45 dropped 47 Hides that the sample has been downloaded from the Internet (zone.identifier) 15->47 49 Installs a global keyboard hook 15->49 29 conhost.exe 19->29         started        51 Tries to steal Mail credentials (via file access) 21->51 53 Tries to harvest and steal ftp login credentials 21->53 55 Tries to harvest and steal browser information (history, passwords, etc) 21->55 31 conhost.exe 23->31         started        33 conhost.exe 25->33         started        signatures8 process9
Detection:
agenttesla
Create hunting rule
Link:
https://mwdb.cert.pl/sample/c5b7a21aec63cb037d441c6e850b500567b1937c21e4f842fbf73930a6ec62a4/
Threat name:
ByteCode-MSIL.Trojan.Kryptik
Create hunting rule
Status:
Malicious
First seen:
2020-08-04 00:01:36 UTC
File Type:
PE (.Net Exe)
Extracted files:
19
AV detection:
23 of 29 (79.31%)
Threat level:
  5/5
Detection(s):
Malicious file
Link:
https://check.spamhaus.org/check/?searchterm=yw32egxmmpfqg7kedrxikc2qavt3de34ehspqqx3644tbjxmmksa._file
Verdict:
malicious
Label(s):
agenttesla
Create hunting rule
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AgentTesla
+ 10'627 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/200804-epwfllhm8n/
Behaviour
Suspicious use of WriteProcessMemory
Suspicious use of SetWindowsHookEx
Suspicious use of AdjustPrivilegeToken
Creates scheduled task(s)
Suspicious behavior: EnumeratesProcesses
Suspicious use of SetThreadContext
Adds Run key to start application
Reads user/profile data of web browsers
Reads data files stored by FTP clients
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:
Trojan
Score:
1.00
Link:
https://yomi.yoroi.company/submissions/c5b7a21aec63cb037d441c6e850b500567b1937c21e4f842fbf73930a6ec62a4

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

zip 5c481de2ca25286f8f196458f68d72c9aa8072d222a1b05edee2cba9045163f3

AgentTesla

Executable exe c5b7a21aec63cb037d441c6e850b500567b1937c21e4f842fbf73930a6ec62a4

(this sample)

  
Dropped by
MD5 c5a26e3b8e9ce0bbdbbdb6259aa42359
  
Delivery method
Distributed via e-mail attachment
Cape
Cape
https://www.capesandbox.com/analysis/38242/
  
Dropped by
SHA256 5c481de2ca25286f8f196458f68d72c9aa8072d222a1b05edee2cba9045163f3

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