MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 564e55246cf97ae3a0a2bc23da960aa8fd8dd6f3a590e4abc8a993254eed7ea9. 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: 7


Intelligence 7 IOCs YARA 3 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 564e55246cf97ae3a0a2bc23da960aa8fd8dd6f3a590e4abc8a993254eed7ea9
SHA3-384 hash: 493e69ba1b22cef6e17a67e72866f069264c1be5db38fa334d0de8d0709452ac9e617487362e9f791bbe77c21938cdd9
SHA1 hash: 2a459109f76c000a44a2c717d5edf64b9dc4c41d
MD5 hash: cbca9743449323b35a7554f4d508faca
humanhash: ink-kitten-dakota-oklahoma
File name:Purchase Order 3423.doc
Download: download sample
Signature AgentTesla
Create hunting rule
File size:18'746 bytes
First seen:2020-08-27 05:26:59 UTC
Last seen:Never
File type:Word file doc
MIME type:application/vnd.openxmlformats-officedocument.wordprocessingml.document
ssdeep 384:/imtnzM+UfChIWLgbvtkStC78O/BzmFHG1pLbEHdT:/LzMz5FFG82mxG1FE9T
TLSH A782AF75DA90B223EB97C17890B94BB0F25D4046F746F6EB580DB6EE26919C7038680B
Reporter abuse_ch
Tags:AgentTesla doc


Avatar
abuse_ch
Malspam distributing AgentTesla:

HELO: mail.bengiamein.ga
Sending IP: 5.8.93.204
From: lillan tan<info@foy-sg.us>
Reply-To: info@foy-sg.us
Subject: Inquiry Order
Attachment: Purchase Order 3423.doc

AgentTesla payload URL:
http://77.73.69.79/opza/holydami.exe

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

Intelligence

File Origin
# of uploads :
1
# of downloads :
87
Origin country :
n/a
Vendor Threat Intelligence
Detection(s):
TwinWave.EvilDoc.DOCXRSTRGOOD.WIN32_PROCESS.200408.UNOFFICIAL
Create hunting rule

TwinWave.EvilDoc.DOCXRSTRGOOD.WINMGMTS
Create hunting rule

TwinWave.EvilDoc.DOCXRSTRGOOD.WIN32_PROCESS.200402.UNOFFICIAL
Create hunting rule

Result
Verdict:
Malware
Maliciousness:

Behaviour
Creating a window
Using the Windows Management Instrumentation requests
Creating a file in the %temp% directory
Launching a process
Creating a process with a hidden window
Deleting a recently created file
DNS request
Sending a custom TCP request
Sending an HTTP GET request
Creating a file in the %AppData% directory
Creating a process from a recently created file
Running batch commands
Enabling autorun with the standard Software\Microsoft\Windows\CurrentVersion\Run registry branch
Bypassing of proactive protection methods using Windows Management Instrumentation (WMI)
Launching a process by exploiting the app vulnerability
Result
Threat name:
AgentTesla
Create hunting rule
Detection:
malicious
Classification:
troj.expl.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/452237
Signature
.NET source code contains very large array initializations
Allocates memory in foreign processes
Compiles downloader code with a AMSI bypass
Creates an autostart registry key pointing to binary in C:\Windows
Creates processes via WMI
Document contains an embedded VBA with base64 encoded strings
Injects a PE file into a foreign processes
Machine Learning detection for dropped file
Multi AV Scanner detection for dropped file
Multi AV Scanner detection for submitted file
Powershell drops PE file
Sigma detected: Add file from suspicious location to autostart registry
Sigma detected: Dot net compiler compiles file from suspicious location
Sigma detected: Suspicious Csc.exe Source File Folder
Suspicious powershell command line found
Very long command line found
Writes to foreign memory regions
Yara detected AgentTesla
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 signatures2 2 Behavior Graph ID: 278478 Sample: Purchase Order 3423.doc Startdate: 27/08/2020 Architecture: WINDOWS Score: 100 57 Multi AV Scanner detection for dropped file 2->57 59 Multi AV Scanner detection for submitted file 2->59 61 Yara detected AgentTesla 2->61 63 9 other signatures 2->63 8 powershell.exe 14 26 2->8         started        13 WINWORD.EXE 46 43 2->13         started        15 pcalua.exe 1 1 2->15         started        17 pcalua.exe 1 2->17         started        process3 dnsIp4 53 77.73.69.79, 49714, 80 FISHNET-ASRU Russian Federation 8->53 55 long.af 104.31.84.52, 443, 49713 CLOUDFLARENETUS United States 8->55 47 C:\Users\user\AppData\Roaming\sef61.exe, PE32 8->47 dropped 49 C:\Users\user\AppData\...\uohmkoui.cmdline, UTF-8 8->49 dropped 51 C:\Users\user\AppData\Local\...\uohmkoui.0.cs, UTF-8 8->51 dropped 71 Compiles downloader code with a AMSI bypass 8->71 73 Powershell drops PE file 8->73 19 sef61.exe 6 8->19         started        23 csc.exe 3 8->23         started        25 conhost.exe 8->25         started        file5 signatures6 process7 file8 41 C:\Users\user\AppData\Roaming\...\sef.exe, PE32 19->41 dropped 43 C:\Users\user\AppData\...\AddInProcess32.exe, PE32 19->43 dropped 65 Multi AV Scanner detection for dropped file 19->65 67 Machine Learning detection for dropped file 19->67 27 sef.exe 3 19->27         started        30 cmd.exe 1 19->30         started        45 C:\Users\user\AppData\Local\...\uohmkoui.dll, PE32 23->45 dropped 32 cvtres.exe 1 23->32         started        signatures9 process10 signatures11 75 Writes to foreign memory regions 27->75 77 Allocates memory in foreign processes 27->77 79 Injects a PE file into a foreign processes 27->79 34 AddInProcess32.exe 27->34         started        36 reg.exe 1 1 30->36         started        39 conhost.exe 30->39         started        process12 signatures13 69 Creates an autostart registry key pointing to binary in C:\Windows 36->69
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/564e55246cf97ae3a0a2bc23da960aa8fd8dd6f3a590e4abc8a993254eed7ea9/
Threat name:
Script-Macro.Trojan.Powload
Create hunting rule
Status:
Malicious
First seen:
2020-08-27 05:28:06 UTC
AV detection:
12 of 29 (41.38%)
Threat level:
  5/5
Detection(s):
Malicious file
Link:
https://check.spamhaus.org/check/?searchterm=kzhfkjdm7f5ohifcxqr5vfqkvd6y3vxtuwiojk6ivgjsktxnp2uq._file
Result
Malware family:
agenttesla
Create hunting rule
Score:
  10/10
Tags:
agilenet keylogger stealer persistence spyware trojan family:agenttesla
Link:
https://tria.ge/reports/200827-nazzgd348n/
Behaviour
Suspicious behavior: AddClipboardFormatListener
Suspicious behavior: EnumeratesProcesses
Suspicious use of AdjustPrivilegeToken
Suspicious use of SetWindowsHookEx
Suspicious use of WriteProcessMemory
Office loads VBA resources, possible macro or embedded object present
Drops file in System32 directory
Suspicious use of SetThreadContext
Adds Run key to start application
Loads dropped DLL
Obfuscated with Agile.Net obfuscator
Reads data files stored by FTP clients
Reads user/profile data of local email clients
Reads user/profile data of web browsers
Blacklisted process makes network request
Executes dropped EXE
AgentTesla Payload
AgentTesla
Process spawned unexpected child process
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/564e55246cf97ae3a0a2bc23da960aa8fd8dd6f3a590e4abc8a993254eed7ea9

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

Word file doc 564e55246cf97ae3a0a2bc23da960aa8fd8dd6f3a590e4abc8a993254eed7ea9

(this sample)

AgentTesla

Executable exe f79708792edddcae0ea7fe021bc5b38152eb3ecd5545a58cd9d244534539f893

  
URLhaus
https://urlhaus.abuse.ch/url/444956/
  
Delivery method
Distributed via e-mail attachment
  
Dropping
SHA256 f79708792edddcae0ea7fe021bc5b38152eb3ecd5545a58cd9d244534539f893
  
Dropping
MD5 32e278dfcf2e7c4dbd2d748223a0c24a

Comments