MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 f448b48505882a50dd6e5f08020280129dca9ef8c41fcdbd0f46655499ff49b4. 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: f448b48505882a50dd6e5f08020280129dca9ef8c41fcdbd0f46655499ff49b4
SHA3-384 hash: 8452afd4e296a15bc7e1670c73ba5480ec0f2fadf0d9bb98d0e213a7994c59d26fa7ed69d2898d097b4ecf3a8d5ffc08
SHA1 hash: 35a835f93b0e638e1cfd37c12231917be1d86cdf
MD5 hash: b4700f953f98341ecf61b6efe10efdc1
humanhash: lion-lamp-nevada-twenty
File name:Clearance_documents(FORM E).exe
Download: download sample
Signature AgentTesla
Create hunting rule
File size:1'139'200 bytes
First seen:2020-08-19 14:01:11 UTC
Last seen:2020-08-19 14:45:25 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 24576:3ktiOcZNzmGS9061KBu5UWTYJ6ot+7ryM4aKtZFzarTPbP+jfyuqt:3ktxU/S91KA5eJ6o4rnozar
Threatray 9'027 similar samples on MalwareBazaar
TLSH 0135E0576389AB2EC1EE92BBF0B14816AF71C21161CBF39A1CCCE57059D33651DCA2B4
Reporter abuse_ch
Tags:AgentTesla exe FedEx


Avatar
abuse_ch
Malspam distributing AgentTesla:

HELO: server.example.com
Sending IP: 62.171.146.191
From: TIANGEN, Beijing, China <joyjoy@bengiamein.gq>
Subject: FW: FEDEX TRACKING NUMBER: 777108113246.
Attachment: Clearance_documentsFORM E.zip (contains "Clearance_documents(FORM E).exe")

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

Intelligence

File Origin
# of uploads :
2
# of downloads :
78
Origin country :
n/a
Vendor Threat Intelligence
Detection:
AgentTeslaV2
Create hunting rule
Link:
https://www.capesandbox.com/analysis/48597/
Detection(s):
SecuriteInfo.com.Trojan.PWS.Siggen2.53688.18847.4643.UNOFFICIAL
Create hunting rule

Result
Verdict:
Malware
Maliciousness:

Behaviour
Creating a window
Creating a file
Launching a process
Sending a UDP request
Using the Windows Management Instrumentation requests
Reading critical registry keys
Stealing user critical data
Enabling autorun by creating a file
Unauthorized injection to a system process
Result
Threat name:
AgentTesla
Create hunting rule
Detection:
malicious
Classification:
troj.adwa.spyw.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/438356
Signature
Drops PE files to the startup folder
Drops PE files to the user root directory
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
Machine Learning detection for dropped file
Maps a DLL or memory area into another process
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: RegAsm connects to smtp port
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)
Writes to foreign memory regions
Yara detected AgentTesla
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 signatures2 2 Behavior Graph ID: 271648 Sample: Clearance_documents(FORM E).exe Startdate: 20/08/2020 Architecture: WINDOWS Score: 100 33 Found malware configuration 2->33 35 Sigma detected: RegAsm connects to smtp port 2->35 37 Yara detected AgentTesla 2->37 39 4 other signatures 2->39 7 Clearance_documents(FORM E).exe 4 2->7         started        process3 file4 21 C:\Users\user\Clearance_docs, PE32 7->21 dropped 23 C:\Users\user\AppData\...\HJdyTuap.exe, PE32 7->23 dropped 25 C:\Users\...\Clearance_docs:Zone.Identifier, ASCII 7->25 dropped 41 Writes to foreign memory regions 7->41 43 Maps a DLL or memory area into another process 7->43 45 Hides that the sample has been downloaded from the Internet (zone.identifier) 7->45 11 RegAsm.exe 2 7->11         started        15 Clearance_documents(FORM E).exe 7->15         started        signatures5 process6 dnsIp7 27 ZRH-efz.ms-acdc.office.com 52.97.232.242, 49725, 587 MICROSOFT-CORP-MSN-AS-BLOCKUS United States 11->27 29 smtp.outlook.com 11->29 31 2 other IPs or domains 11->31 47 Tries to harvest and steal Putty / WinSCP information (sessions, passwords, etc) 11->47 49 Queries sensitive network adapter information (via WMI, Win32_NetworkAdapter, often done to detect virtual machines) 11->49 51 Tries to steal Mail credentials (via file access) 11->51 57 3 other signatures 11->57 53 Writes to foreign memory regions 15->53 55 Maps a DLL or memory area into another process 15->55 17 RegAsm.exe 15->17         started        19 RegAsm.exe 15->19         started        signatures8 process9
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/f448b48505882a50dd6e5f08020280129dca9ef8c41fcdbd0f46655499ff49b4/
Threat name:
ByteCode-MSIL.Trojan.AgentTesla
Create hunting rule
Status:
Malicious
First seen:
2020-08-19 14:03:06 UTC
AV detection:
23 of 29 (79.31%)
Threat level:
  5/5
Detection(s):
Malicious file
Link:
https://check.spamhaus.org/check/?searchterm=6reljbifravfbxlol4eaeauacko4vhxyyqp43pipizsvjgp7jg2a._file
Verdict:
malicious
Label(s):
agenttesla
Create hunting rule
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a7ef4ee04196bec21da515066ffd2c59a040e0004f0c69fb046347f574998db4
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b8d1d962744d0c6ab3abe293c4671b3ba6524f623f9d6f02361bc60eec7b4cb4
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e2d8bfec4161287caf4f118ec66daaceb71c6fdda1b4aa16f8810f8a66f59013
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e2ff7c5e749d36ebfcc2a9d5af487369e454ef301a859eb8fc11ebe15ea73e34
AgentTesla
+ 9'017 additional samples on MalwareBazaar
Result
Malware family:
agenttesla
Create hunting rule
Score:
  10/10
Tags:
keylogger stealer spyware trojan family:agenttesla
Link:
https://tria.ge/reports/200819-4xzg9cavhx/
Behaviour
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: MapViewOfSection
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
Suspicious use of SetThreadContext
Drops startup file
Reads data files stored by FTP clients
Reads user/profile data of local email clients
Reads user/profile data of web browsers
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/f448b48505882a50dd6e5f08020280129dca9ef8c41fcdbd0f46655499ff49b4

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 25a791c6f1c9929a7364832ca44d781e8bfc7b765482e6ebf90827259a2fb6b9

AgentTesla

Executable exe f448b48505882a50dd6e5f08020280129dca9ef8c41fcdbd0f46655499ff49b4

(this sample)

  
Dropped by
MD5 cc9bbb938363ff16239eacda96f832e6
  
Delivery method
Distributed via e-mail attachment
Cape
Cape
https://www.capesandbox.com/analysis/48597/
  
Dropped by
SHA256 25a791c6f1c9929a7364832ca44d781e8bfc7b765482e6ebf90827259a2fb6b9

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