MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 4eff27126b74a235694015e24eef51535df0957aee93773e67db901b07df3270. 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: 4eff27126b74a235694015e24eef51535df0957aee93773e67db901b07df3270
SHA3-384 hash: 2b12d8f4457b155fe3f86f35fb02da31d2c96395faf6bfdd7069408f70b568a2801c37a8f87fb6c469e1a8f7bde05af8
SHA1 hash: 7c3c54aae729639fb932b21e9da7678221bff506
MD5 hash: c7bf9ad8b7c42893db0d7ed194b9b070
humanhash: aspen-louisiana-lamp-pasta
File name:t_X6V9JC.txt
Download: download sample
Signature AgentTesla
Create hunting rule
File size:903'168 bytes
First seen:2020-08-31 13:01:28 UTC
Last seen:2020-08-31 16:35:08 UTC
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'652 x AgentTesla, 19'463 x Formbook, 12'204 x SnakeKeylogger)
ssdeep 6144:aZYZWBXFXfMrKmHT1Qw2tCoFeQ+xvTQaLdYLMLOLwGHMFkKDwEYXfM5DkCPHiV6w:9xVJACoT+xvT3hUNKEfM5DV4g+UivdR
Threatray 180 similar samples on MalwareBazaar
TLSH 4E15383E3ACA5119C93C867204A89DD1B332AB46BA45C72F79DF078C9E0238F776558D
Reporter abuse_ch
Tags:AgentTesla exe


Avatar
abuse_ch
Malspam distributing AgentTesla:

HELO: tara.bjchost.com
Sending IP: 103.4.18.111
From: SUE <sue@monsterglass.com.au>
Subject: FW: INVOICE COPIES
Attachment: AUGUST_INVOICE_COPIES.xls

AgentTesla payload URL:
https://s3.rokket.space/t_X6V9JC.txt

Intelligence

File Origin
# of uploads :
2
# of downloads :
80
Origin country :
n/a
Vendor Threat Intelligence
Detection:
AgentTeslaV2
Create hunting rule
Link:
https://www.capesandbox.com/analysis/53542/
Detection(s):
SecuriteInfo.com.Variant.Razy.745792.16.9626.UNOFFICIAL
Create hunting rule

Result
Verdict:
Malware
Maliciousness:

Behaviour
Creating a window
Sending a UDP request
Creating a file in the %temp% directory
Running batch commands
Launching a process
Creating a file
Creating a process from a recently created file
Enabling autorun with the standard Software\Microsoft\Windows\CurrentVersion\Run registry branch
Unauthorized injection to a recently created process
Result
Threat name:
AgentTesla
Create hunting rule
Detection:
malicious
Classification:
troj.spyw.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/455474
Signature
.NET source code contains very large array initializations
Allocates memory in foreign processes
Creates an autostart registry key pointing to binary in C:\Windows
Creates multiple autostart registry keys
Drops PE files to the user root directory
Found malware configuration
Hides that the sample has been downloaded from the Internet (zone.identifier)
Injects a PE file into a foreign processes
Machine Learning detection for dropped file
Machine Learning detection for sample
Multi AV Scanner detection for dropped file
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)
Snort IDS alert for network traffic (e.g. based on Emerging Threat rules)
Tries to harvest and steal ftp login credentials
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: 280112 Sample: t_X6V9JC.txt Startdate: 31/08/2020 Architecture: WINDOWS Score: 100 40 Snort IDS alert for network traffic (e.g. based on Emerging Threat rules) 2->40 42 Found malware configuration 2->42 44 Yara detected AgentTesla 2->44 46 2 other signatures 2->46 7 t_X6V9JC.exe 7 2->7         started        11 pcalua.exe 1 2->11         started        13 pcalua.exe 1 1 2->13         started        process3 file4 32 C:\Users\user\mghd.exe, PE32 7->32 dropped 34 C:\Users\user\AppData\...\InstallUtil.exe, PE32 7->34 dropped 36 C:\Users\user\mghd.exe:Zone.Identifier, ASCII 7->36 dropped 38 C:\Users\user\AppData\...\t_X6V9JC.exe.log, ASCII 7->38 dropped 60 Drops PE files to the user root directory 7->60 15 mghd.exe 2 7->15         started        18 cmd.exe 1 7->18         started        20 mghd.exe 3 11->20         started        signatures5 process6 signatures7 62 Writes to foreign memory regions 15->62 64 Allocates memory in foreign processes 15->64 66 Injects a PE file into a foreign processes 15->66 22 InstallUtil.exe 2 4 15->22         started        26 reg.exe 1 1 18->26         started        28 conhost.exe 18->28         started        68 Multi AV Scanner detection for dropped file 20->68 70 Machine Learning detection for dropped file 20->70 process8 file9 30 C:\Users\user\AppData\Roaming\...\57QwA12.exe, PE32 22->30 dropped 48 Queries sensitive network adapter information (via WMI, Win32_NetworkAdapter, often done to detect virtual machines) 22->48 50 Tries to steal Mail credentials (via file access) 22->50 52 Queries sensitive BIOS Information (via WMI, Win32_Bios & Win32_BaseBoard, often done to detect virtual machines) 22->52 58 2 other signatures 22->58 54 Creates multiple autostart registry keys 26->54 56 Creates an autostart registry key pointing to binary in C:\Windows 26->56 signatures10
Detection:
agenttesla
Create hunting rule
Link:
https://mwdb.cert.pl/sample/4eff27126b74a235694015e24eef51535df0957aee93773e67db901b07df3270/
Threat name:
ByteCode-MSIL.Trojan.Kryptik
Create hunting rule
Status:
Malicious
First seen:
2020-08-31 13:03:04 UTC
AV detection:
23 of 29 (79.31%)
Threat level:
  5/5
Detection(s):
Malicious file
Link:
https://check.spamhaus.org/check/?searchterm=j37soetlosrdk2kacxre532rkno7bfl252jxopth3oibwb67gjya._file
Verdict:
unknown
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AgentTesla
+ 170 additional samples on MalwareBazaar
Result
Malware family:
agenttesla
Create hunting rule
Score:
  10/10
Tags:
keylogger stealer family:agenttesla
Link:
https://tria.ge/reports/200831-qs8b28pl3e/
Behaviour
AgentTesla Payload
Agenttesla family
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/4eff27126b74a235694015e24eef51535df0957aee93773e67db901b07df3270

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

Excel file xls 447dc21a508d91316f21d3bb7a5df9f9236526d79c92d38644aa1415727d463e

AgentTesla

Executable exe 4eff27126b74a235694015e24eef51535df0957aee93773e67db901b07df3270

(this sample)

  
URLhaus
https://urlhaus.abuse.ch/url/447395/
  
Dropped by
MD5 03f25e6e7e051bf27d3cf6b26803ac24
  
Dropped by
SHA256 447dc21a508d91316f21d3bb7a5df9f9236526d79c92d38644aa1415727d463e
  
Delivery method
Distributed via web download
Cape
Cape
https://www.capesandbox.com/analysis/53542/

Comments