MalwareBazaar Database

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Database Entry


Intelligence File information Yara 3 Comments

SHA256 hash: a0ef424407ec036182e8c88177b6178d6eaa04f2ec01026016df1660034aadca
SHA3-384 hash: ccbe810a973e0f01d05356ba6d50e027a5020658d09367a167cc224522688922755596cc60c8697069cec005c9cd1b55
SHA1 hash: bcfd5fd4a4922dfcd282f820905fb9566f0af715
MD5 hash: 67556a9ec93eb4e858d667ad1d17a70e
humanhash: saturn-leopard-rugby-monkey
File name:JOB_APPLICATION.exe
Download: download sample
Signature AgentTesla
File size:465'408 bytes
First seen:2020-07-31 10:55:43 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744
ssdeep 12288:6I9jr2g7Tof9nOtFvTTYVFAYXsBnxWQaAcZ0zB7wltqwC:6I9jr2gXp3zZBnxWxZ0zpwzb
TLSH 56A4DF8CB0CB551BF41134BE9FF9829BCEAAF02F4243426B56756497817DB482EC1E36
Reporter @abuse_ch
Tags:AgentTesla exe


Twitter
@abuse_ch
Malspam distributing AgentTesla:

HELO: singnet.com.sg
Sending IP: 103.99.3.148
From: Emily Mia <jurneira@singnet.com.sg>
Subject: JOB APPLICATION_CV
Attachment: JOB_APPLICATION.iso (contains "JOB_APPLICATION.exe")

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

Intelligence


File Origin
# of uploads :
1
# of downloads :
34
Origin country :
US US
Mail intelligence
Geo location:
Global
Volume:
Low
Geo location:
IT Italy
Volume:
Low
Vendor Threat Intelligence
Gathering data
Result
Threat name:
AgentTesla
Detection:
malicious
Classification:
troj.spyw.evad
Score:
100 / 100
Signature
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)
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 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:
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 255308 Sample: JOB_APPLICATION.exe Startdate: 31/07/2020 Architecture: WINDOWS Score: 100 28 g.msn.com 2->28 34 Found malware configuration 2->34 36 Sigma detected: Scheduled temp file as task from temp location 2->36 38 Yara detected AgentTesla 2->38 40 5 other signatures 2->40 8 JOB_APPLICATION.exe 7 2->8         started        signatures3 process4 file5 20 C:\Users\user\AppData\...\&startupname&.exe, PE32 8->20 dropped 22 C:\Users\user\AppData\Local\...\tmp4B86.tmp, XML 8->22 dropped 24 C:\...\&startupname&.exe:Zone.Identifier, ASCII 8->24 dropped 26 C:\Users\user\...\JOB_APPLICATION.exe.log, ASCII 8->26 dropped 42 Queries sensitive network adapter information (via WMI, Win32_NetworkAdapter, often done to detect virtual machines) 8->42 44 Queries sensitive BIOS Information (via WMI, Win32_Bios & Win32_BaseBoard, often done to detect virtual machines) 8->44 46 Injects a PE file into a foreign processes 8->46 12 JOB_APPLICATION.exe 2 8->12         started        16 schtasks.exe 1 8->16         started        signatures6 process7 dnsIp8 30 smtp.yandex.ru 77.88.21.158, 49741, 587 YANDEXRU Russian Federation 12->30 32 smtp.yandex.com 12->32 48 Tries to harvest and steal Putty / WinSCP information (sessions, passwords, etc) 12->48 50 Tries to steal Mail credentials (via file access) 12->50 52 Tries to harvest and steal ftp login credentials 12->52 54 Tries to harvest and steal browser information (history, passwords, etc) 12->54 18 conhost.exe 16->18         started        signatures9 process10
Threat name:
ByteCode-MSIL.Trojan.Kryptik
Status:
Malicious
First seen:
2020-07-31 10:57:07 UTC
AV detection:
22 of 31 (70.97%)
Threat level
  5/5
Result
Malware family:
agenttesla
Score:
  10/10
Tags:
keylogger stealer spyware trojan family:agenttesla
Behaviour
Creates scheduled task(s)
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
Suspicious behavior: EnumeratesProcesses
Suspicious use of SetThreadContext
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
Threat name:
Kryptik
Score:
1.00

Yara Signatures


Rule name:Agenttesla_type2
Author:JPCERT/CC Incident Response Group
Description:detect Agenttesla in memory
Reference:internal research
Rule name:CAP_HookExKeylogger
Author:Brian C. Bell -- @biebsmalwareguy
Reference:https://github.com/DFIRnotes/rules/blob/master/CAP_HookExKeylogger.yar
Rule name:win_agent_tesla_w1
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

Executable exe a0ef424407ec036182e8c88177b6178d6eaa04f2ec01026016df1660034aadca

(this sample)

  
Delivery method
Distributed via e-mail attachment

Comments