MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 439ed702b9700b4bd7ec8877db8d90820176cd183cb888c8be9b14267d3581cc. 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
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SHA256 hash: 439ed702b9700b4bd7ec8877db8d90820176cd183cb888c8be9b14267d3581cc
SHA3-384 hash: 6e4cc775253b5875cc05d39a37a2382e78d2d064b2fa70ab7f34d6c90c0a93456d3f55a03f54dbf4499936a415808650
SHA1 hash: bb80dad1518cd8d7bb912b74bcf01c927b45394a
MD5 hash: 6b1a709c8884accc0ba410ef9413a04c
humanhash: maine-magnesium-iowa-batman
File name:Letter.exe
Download: download sample
Signature AgentTesla
Create hunting rule
File size:594'944 bytes
First seen:2020-08-11 11:47:46 UTC
Last seen:2020-08-11 13:19:23 UTC
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:jaVclX0WmxLfL8GqYwi79K/rDff6TkrHNp983c7XrZy:B0WmxjLlwi7orDHL5783gr
Threatray 10'722 similar samples on MalwareBazaar
TLSH 3EC4F15567D86B42D03E9379C321240A03F7D95BFB38EB097FD312D80A52B7297A2A17
Reporter abuse_ch
Tags:AgentTesla exe


Avatar
abuse_ch
Malspam distributing AgentTesla:

HELO: vq0.719.miditruni.ga
Sending IP: 161.35.74.106
From: Accounts <accounts@719.miditruni.ga>
Subject: Payment
Attachment: Letter.gz (contains "Letter.exe")

Intelligence

File Origin
# of uploads :
2
# of downloads :
72
Origin country :
n/a
Vendor Threat Intelligence
Gathering data
Detection(s):
SecuriteInfo.com.Fareit-FYE6B1A709C8884.9519.UNOFFICIAL
Create hunting rule

Result
Verdict:
Malware
Maliciousness:

Behaviour
Creating a window
Sending a UDP request
Using the Windows Management Instrumentation requests
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/418664
Signature
.NET source code contains potential unpacker
Found malware configuration
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)
Queries sensitive video device information (via WMI, Win32_VideoController, 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: 261652 Sample: Letter.exe Startdate: 11/08/2020 Architecture: WINDOWS Score: 100 34 Snort IDS alert for network traffic (e.g. based on Emerging Threat rules) 2->34 36 Found malware configuration 2->36 38 Sigma detected: Scheduled temp file as task from temp location 2->38 40 7 other signatures 2->40 7 Letter.exe 7 2->7         started        process3 dnsIp4 28 192.168.2.1 unknown unknown 7->28 20 C:\Users\user\AppData\...\hWFpUZAPSDgj.exe, PE32 7->20 dropped 22 C:\Users\...\hWFpUZAPSDgj.exe:Zone.Identifier, ASCII 7->22 dropped 24 C:\Users\user\AppData\Local\...\tmp1F32.tmp, XML 7->24 dropped 26 C:\Users\user\AppData\...\Letter.exe.log, ASCII 7->26 dropped 42 Queries sensitive video device information (via WMI, Win32_VideoController, often done to detect virtual machines) 7->42 44 Queries sensitive network adapter information (via WMI, Win32_NetworkAdapter, often done to detect virtual machines) 7->44 46 Queries sensitive BIOS Information (via WMI, Win32_Bios & Win32_BaseBoard, often done to detect virtual machines) 7->46 48 Injects a PE file into a foreign processes 7->48 12 Letter.exe 2 7->12         started        16 schtasks.exe 1 7->16         started        file5 signatures6 process7 dnsIp8 30 gayaceramic.com 144.208.71.113, 49741, 587 IMH-WESTUS United States 12->30 32 mail.gayaceramic.com 12->32 50 Tries to harvest and steal Putty / WinSCP information (sessions, passwords, etc) 12->50 52 Tries to steal Mail credentials (via file access) 12->52 54 Tries to harvest and steal ftp login credentials 12->54 56 Tries to harvest and steal browser information (history, passwords, etc) 12->56 18 conhost.exe 16->18         started        signatures9 process10
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/439ed702b9700b4bd7ec8877db8d90820176cd183cb888c8be9b14267d3581cc/
Threat name:
ByteCode-MSIL.Backdoor.NanoCore
Create hunting rule
Status:
Malicious
First seen:
2020-08-11 11:49:05 UTC
AV detection:
24 of 29 (82.76%)
Threat level:
  5/5
Detection(s):
Malicious file
Link:
https://check.spamhaus.org/check/?searchterm=iopnoavzoafuxv7mrb35xdmqqiaxntiyhs4irsf6tmkcm7jvqhga._file
Verdict:
malicious
Label(s):
agenttesla
Create hunting rule
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de4e7923d6209906899738f2091bd48d49e2bce9fbc5aebe7658444e8d040285
AgentTesla
+ 10'712 additional samples on MalwareBazaar
Result
Malware family:
agenttesla
Create hunting rule
Score:
  10/10
Tags:
keylogger stealer evasion spyware trojan family:agenttesla
Link:
https://tria.ge/reports/200811-qjymyhr7k2/
Behaviour
Creates scheduled task(s)
Suspicious behavior: EnumeratesProcesses
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
Suspicious use of SetThreadContext
Maps connected drives based on registry
Checks BIOS information in registry
Reads data files stored by FTP clients
Reads user/profile data of local email clients
Reads user/profile data of web browsers
Looks for VMWare Tools registry key
AgentTesla Payload
Looks for VirtualBox Guest Additions in registry
AgentTesla
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/439ed702b9700b4bd7ec8877db8d90820176cd183cb888c8be9b14267d3581cc

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

gz cd995254d59965755cb01e59fd244abcf2df29c0979de0e31789879fc2a495e8

AgentTesla

Executable exe 439ed702b9700b4bd7ec8877db8d90820176cd183cb888c8be9b14267d3581cc

(this sample)

  
Dropped by
MD5 f8e9270d027d199ca0bb42fd839bdc30
  
Delivery method
Distributed via e-mail attachment
Cape
Cape
https://www.capesandbox.com/analysis/43309/
  
Dropped by
SHA256 cd995254d59965755cb01e59fd244abcf2df29c0979de0e31789879fc2a495e8

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