MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 8c254637c5c98fe6755a44e5ea6feba18d0a17c4ad53e8d791277390060c29e5. 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: 8c254637c5c98fe6755a44e5ea6feba18d0a17c4ad53e8d791277390060c29e5
SHA3-384 hash: eb3623823dc369a032ee374dd64c35771ef04ccf6d0c20ca65b878c5f51d42e1621738f9fc0168845d0c906b4f2a5fca
SHA1 hash: c639dd9daf6f010142a37ef1fac0fbd8a00c3efd
MD5 hash: 8db27a63baec87e325fe3245f6778790
humanhash: rugby-failed-muppet-moon
File name:News-Update.scr
Download: download sample
Signature AgentTesla
Create hunting rule
File size:580'096 bytes
First seen:2020-07-16 06:59:14 UTC
Last seen:Never
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:zfn2k4zUXGu2FRZ/YDOyYF9NVbNUKOY7+7z2N1vDrB:DRGj5wxw9NVbNUhT
Threatray 11'111 similar samples on MalwareBazaar
TLSH 6AC48CCC3510B19EC45FCD768964DC70A6206DA2F7FBE20663C36E9F793C696CA111A2
Reporter abuse_ch
Tags:AgentTesla Endurance scr


Avatar
abuse_ch
Malspam distributing AgentTesla:

HELO: 192-254-193-67.unifiedlayer.com
Sending IP: 192.254.193.67
From: Thai Rice Exporters <contact@thairiceexporters.or.th>
Subject: Update Rice news for 16 Jul 2020
Attachment: News-Update.zip (contains "News-Update.scr")

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

Intelligence

File Origin
# of uploads :
1
# of downloads :
79
Origin country :
n/a
Vendor Threat Intelligence
Detection:
AgentTeslaV2
Create hunting rule
Link:
https://www.capesandbox.com/analysis/26414/
Detection(s):
SecuriteInfo.com.CAP_HookExKeylogger.15485.17538.UNOFFICIAL
Create hunting rule

Result
Verdict:
Malware
Maliciousness:

Behaviour
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
Using the Windows Management Instrumentation requests
Creating a file in the %AppData% subdirectories
Reading critical registry keys
Launching a service
Creating a file
Setting a keyboard event handler
Enabling autorun with the standard Software\Microsoft\Windows\CurrentVersion\Run registry branch
Stealing user critical data
Enabling autorun with Startup directory
Result
Threat name:
AgentTesla
Create hunting rule
Detection:
malicious
Classification:
troj.spyw.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/389371
Signature
Contains functionality to register a low level keyboard hook
Found malware configuration
Hides that the sample has been downloaded from the Internet (zone.identifier)
Injects a PE file into a foreign processes
Installs a global keyboard hook
Machine Learning detection for dropped file
Machine Learning detection for sample
Malicious sample detected (through community Yara rule)
May check the online IP address of the machine
Multi AV Scanner detection for dropped file
Multi AV Scanner detection for submitted file
Queries sensitive BIOS Information (via WMI, Win32_Bios & Win32_BaseBoard, often done to detect virtual machines)
Sigma detected: Scheduled temp file as task from temp location
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 Agent Tesla Trojan
Yara detected AgentTesla
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 246863 Sample: News-Update.scr Startdate: 19/07/2020 Architecture: WINDOWS Score: 100 45 checkip.us-east-1.prod.check-ip.aws.a2z.com 2->45 47 checkip.check-ip.aws.a2z.com 2->47 49 checkip.amazonaws.com 2->49 61 Found malware configuration 2->61 63 Malicious sample detected (through community Yara rule) 2->63 65 Multi AV Scanner detection for dropped file 2->65 67 10 other signatures 2->67 8 News-Update.exe 5 2->8         started        12 Window Updater.exe 2->12         started        14 Window Updater.exe 1 2->14         started        signatures3 process4 file5 37 C:\Users\user\AppData\...\YThapGcLkG.exe, PE32 8->37 dropped 39 C:\Users\...\YThapGcLkG.exe:Zone.Identifier, ASCII 8->39 dropped 41 C:\Users\user\AppData\Local\...\tmp669A.tmp, XML 8->41 dropped 43 C:\Users\user\AppData\...43ews-Update.exe.log, ASCII 8->43 dropped 77 Queries sensitive BIOS Information (via WMI, Win32_Bios & Win32_BaseBoard, often done to detect virtual machines) 8->77 79 Injects a PE file into a foreign processes 8->79 16 News-Update.exe 8->16         started        18 News-Update.exe 17 17 8->18         started        23 schtasks.exe 1 8->23         started        25 Window Updater.exe 12->25         started        signatures6 process7 dnsIp8 27 Window Updater.exe 14 16->27         started        51 smtp.yandex.ru 77.88.21.158, 49731, 49733, 587 YANDEXRU Russian Federation 18->51 53 checkip.us-east-1.prod.check-ip.aws.a2z.com 107.23.193.11, 49737, 80 AMAZON-AESUS United States 18->53 55 3 other IPs or domains 18->55 33 C:\Users\user\AppData\...\Window Updater.exe, PE32 18->33 dropped 35 C:\...\Window Updater.exe:Zone.Identifier, ASCII 18->35 dropped 69 Tries to harvest and steal Putty / WinSCP information (sessions, passwords, etc) 18->69 71 Tries to steal Mail credentials (via file access) 18->71 73 Hides that the sample has been downloaded from the Internet (zone.identifier) 18->73 75 Installs a global keyboard hook 18->75 31 conhost.exe 23->31         started        file9 signatures10 process11 dnsIp12 57 smtp.yandex.ru 27->57 59 smtp.yandex.com 27->59 81 Tries to harvest and steal Putty / WinSCP information (sessions, passwords, etc) 27->81 83 Tries to steal Mail credentials (via file access) 27->83 85 Tries to harvest and steal ftp login credentials 27->85 87 3 other signatures 27->87 signatures13
Detection:
agenttesla
Create hunting rule
Link:
https://mwdb.cert.pl/sample/8c254637c5c98fe6755a44e5ea6feba18d0a17c4ad53e8d791277390060c29e5/
Threat name:
ByteCode-MSIL.Trojan.AgentTesla
Create hunting rule
Status:
Malicious
First seen:
2020-07-16 07:01:06 UTC
AV detection:
24 of 29 (82.76%)
Threat level:
  5/5
Detection(s):
Malicious file
Link:
https://check.spamhaus.org/check/?searchterm=rqsumn6fzgh6m5k2its6u37luggquf6evvj6rv4re5zzabqmfhsq._file
Verdict:
malicious
Label(s):
agenttesla
Create hunting rule
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AgentTesla
+ 11'101 additional samples on MalwareBazaar
Result
Malware family:
n/a
Score:
  3/10
Tags:
n/a
Link:
https://tria.ge/reports/200716-wsk7wq75cn/
Behaviour
Suspicious behavior: EnumeratesProcesses
Creates scheduled task(s)
Suspicious use of WriteProcessMemory
Suspicious use of AdjustPrivilegeToken
Suspicious use of SetWindowsHookEx
Suspicious use of AdjustPrivilegeToken
Suspicious behavior: EnumeratesProcesses
Program crash
Suspicious use of SetThreadContext
Looks up external IP address via web service
Adds Run key to start application
Reads user/profile data of local email clients
Reads user/profile data of web browsers
Reads data files stored by FTP clients
Please note that we are no longer able to provide a coverage score for Virus Total.

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 d6a628fe234851cb3045421c715d20564d6838deeaa36385289e670e85f26daf

AgentTesla

Executable exe 8c254637c5c98fe6755a44e5ea6feba18d0a17c4ad53e8d791277390060c29e5

(this sample)

  
Dropped by
MD5 24d0e492ec508f017e50ca44c50fd437
  
Delivery method
Distributed via e-mail attachment
  
Dropped by
SHA256 d6a628fe234851cb3045421c715d20564d6838deeaa36385289e670e85f26daf
Cape
Cape
https://www.capesandbox.com/analysis/26414/

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