MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 4131d43f1597af2d35f0f44040aca3cb09b14f934d0ea2cb04ca4a1b9f3991cb. 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: 4131d43f1597af2d35f0f44040aca3cb09b14f934d0ea2cb04ca4a1b9f3991cb
SHA3-384 hash: 86e012fd2faf22c738de468b3af5a4f86be5ef9494f91eeaf35ee3a888933e54477e43cb877df5f18ab55a1135b0e26c
SHA1 hash: db8dd7c52a6fa21be18eb02389366fcfa961be53
MD5 hash: 537d74834a49dcb5040ea9b151a035e7
humanhash: nine-william-foxtrot-india
File name:TT COPY 69464847863.exe
Download: download sample
Signature AgentTesla
Create hunting rule
File size:488'448 bytes
First seen:2020-08-19 12:56:08 UTC
Last seen:2020-08-19 13:45:34 UTC
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'650 x AgentTesla, 19'462 x Formbook, 12'203 x SnakeKeylogger)
ssdeep 12288:PDdx7Ek4E2JckqwbkM9mMi37MFywvSEP4z:Ppxgk4E29qKDm/3GyWSEPQ
Threatray 35 similar samples on MalwareBazaar
TLSH 7DA4F19760A52764C43C74FA510108A346A7DC1A871AFAB601F877BE11BE663CF2673F
Reporter abuse_ch
Tags:AgentTesla exe


Avatar
abuse_ch
Malspam distributing AgentTesla:

HELO: vinflair.com.cn
Sending IP: 103.99.1.149
From: <ritali.sha<ritali.sha@vinflair.com.cn>
Subject: RE: ADVANCE PAYMENT SLIP
Attachment: TT COPY 69464847863.rar (contains "TT COPY 69464847863.exe")

AgentTesla SMTP exfil server:
mail.framafilms.com:587

Intelligence

File Origin
# of uploads :
2
# of downloads :
73
Origin country :
n/a
Vendor Threat Intelligence
Detection:
n/a
Link:
https://www.capesandbox.com/analysis/48525/
Detection(s):
SecuriteInfo.com.Trojan.Inject3.51985.6075.5229.UNOFFICIAL
Create hunting rule

Result
Verdict:
Malware
Maliciousness:

Behaviour
Creating a window
Sending a UDP request
Launching a process
Creating a file
Using the Windows Management Instrumentation requests
Unauthorized injection to a system process
Result
Threat name:
AgentTesla
Create hunting rule
Detection:
malicious
Classification:
troj.spyw.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/438036
Signature
Allocates memory in foreign processes
Contains functionality to check if a debugger is running (CheckRemoteDebuggerPresent)
Hides that the sample has been downloaded from the Internet (zone.identifier)
Injects a PE file into a foreign processes
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)
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 steal Mail credentials (via file access)
Writes to foreign memory regions
Yara detected AgentTesla
Yara detected AntiVM_3
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 signatures2 2 Behavior Graph ID: 271508 Sample: TT COPY 69464847863.exe Startdate: 20/08/2020 Architecture: WINDOWS Score: 100 28 Yara detected AgentTesla 2->28 30 Yara detected AntiVM_3 2->30 32 Machine Learning detection for sample 2->32 34 2 other signatures 2->34 6 TT COPY 69464847863.exe 3 2->6         started        10 BAVLA.exe 4 2->10         started        12 BAVLA.exe 3 2->12         started        process3 file4 24 C:\Users\user\...\TT COPY 69464847863.exe.log, ASCII 6->24 dropped 36 Writes to foreign memory regions 6->36 38 Allocates memory in foreign processes 6->38 40 Injects a PE file into a foreign processes 6->40 14 RegSvcs.exe 2 6 6->14         started        18 RegSvcs.exe 6->18         started        20 conhost.exe 10->20         started        22 conhost.exe 12->22         started        signatures5 process6 file7 26 C:\Users\user\AppData\Roaming\...\BAVLA.exe, PE32 14->26 dropped 42 Tries to steal Mail credentials (via file access) 14->42 44 Tries to harvest and steal browser information (history, passwords, etc) 14->44 46 Hides that the sample has been downloaded from the Internet (zone.identifier) 14->46 48 Queries sensitive network adapter information (via WMI, Win32_NetworkAdapter, often done to detect virtual machines) 18->48 50 Queries sensitive BIOS Information (via WMI, Win32_Bios & Win32_BaseBoard, often done to detect virtual machines) 18->50 signatures8
Detection:
agenttesla
Create hunting rule
Link:
https://mwdb.cert.pl/sample/4131d43f1597af2d35f0f44040aca3cb09b14f934d0ea2cb04ca4a1b9f3991cb/
Threat name:
ByteCode-MSIL.Ransomware.TeslaCrypt
Create hunting rule
Status:
Malicious
First seen:
2020-08-19 04:11:28 UTC
AV detection:
24 of 29 (82.76%)
Threat level:
  5/5
Detection(s):
Malicious file
Link:
https://check.spamhaus.org/check/?searchterm=iey5ipyvs6xs2npq6raeblfdzme3ct4tjuhkfsyezjfbxhzzshfq._file
Verdict:
unknown
Similar samples:
3333a191bc36b4a7a76e51c0b7b83c5d2b7d253f074789c2302ec598c30711b3
AgentTesla
56f2c7b9d0efa06b177d87a0617b2a4ccb000d72599d046e3cc014628a4ca497
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66332e53989ee89d3c963cecd82424b45e332cadb2d9e13ba13f9f49d22b25ee
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687bbb360426bced3a9f69df3a4ae321c30c2e6e8cc40bde6b6b7519a6aaab34
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779250862192983603f41542782abb140ff3a0be669c5fb3bf80ea6932b4fc50
AgentTesla
88ca3229bbbcdfa0efd9ba8533253fc7cb11206b266d0bcdde54e2c10ac87e35
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923400c38b42c55fd484b8dfec8058a5952de23cbe053dea7bf041aa727c1b25
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992224c3cf97b0d58a9a0c5af443de835abecf518c8c9da0c7724f8929922f8f
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d3027dd8d1fd1dc823baace52ec28189ed1486065438d86c640199f4d98d3f79
AgentTesla
d589bde71aff96cea185e9175ca0797d0799a0f0d64de123be6e2c1bc9c73b68
AgentTesla
+ 25 additional samples on MalwareBazaar
Result
Malware family:
agenttesla
Create hunting rule
Score:
  10/10
Tags:
keylogger stealer spyware trojan family:agenttesla persistence
Link:
https://tria.ge/reports/200819-ksta4r1tsj/
Behaviour
Suspicious behavior: EnumeratesProcesses
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
Suspicious use of SetThreadContext
Adds Run key to start application
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:
Trojan
Score:
1.00
Link:
https://yomi.yoroi.company/submissions/4131d43f1597af2d35f0f44040aca3cb09b14f934d0ea2cb04ca4a1b9f3991cb

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

rar ee36377953ab4e7c3c06b15dea9bff67fbe114c459164179749ab0dc0c1c43fa

AgentTesla

Executable exe 4131d43f1597af2d35f0f44040aca3cb09b14f934d0ea2cb04ca4a1b9f3991cb

(this sample)

  
Dropped by
MD5 765f30d4595b10a4b0850d88c8e2e72d
  
Delivery method
Distributed via e-mail attachment
Cape
Cape
https://www.capesandbox.com/analysis/48525/
  
Dropped by
SHA256 ee36377953ab4e7c3c06b15dea9bff67fbe114c459164179749ab0dc0c1c43fa

Comments