MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 4c09fce4576481f55dcd4cffbe780d90867da332a6d86666831496fa33e36b84. 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: 4c09fce4576481f55dcd4cffbe780d90867da332a6d86666831496fa33e36b84
SHA3-384 hash: 6b8947f4b3e52b0968d2902b15af54136d31ecd1a091df3c3ef6525276cde2f2089366309bb6eabf60c0d6500c3359e5
SHA1 hash: f5d165fcbf2075bedf5a3f0cad36781030d8dcc9
MD5 hash: b928fd1ba01bd33342b2462fb6e55947
humanhash: bravo-leopard-berlin-shade
File name:purchase Order NO.8909w4vvy..exe
Download: download sample
Signature AgentTesla
Create hunting rule
File size:597'504 bytes
First seen:2020-07-29 06:55:28 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'740 x AgentTesla, 19'597 x Formbook, 12'241 x SnakeKeylogger)
ssdeep 12288:sfNytv9tr7ERGVLVbTck9ESlzfIIxJjAtk0HLmAFZmd:suff7gOzVxJiV8
Threatray 10'700 similar samples on MalwareBazaar
TLSH 2ED4010061A81B1FE72A84B87063C6F06267D095EB61DEB35D9FE4A719D22FD39C3247
Reporter abuse_ch
Tags:AgentTesla exe


Avatar
abuse_ch
Malspam distributing AgentTesla:

HELO: coveryazilim.com.tr
Sending IP: 37.49.224.50
From: Bilgin Küçükyaşar <bky@coveryazilim.com.tr>
Subject: Re: RFQ
Attachment: purchase Order NO.8909w4vvy.doc (contains "purchase Order NO.8909w4vvy..exe")

AgentTesla SMTP exfil server:
smtp.bnb-spa.com:587

Intelligence

File Origin
# of uploads :
1
# of downloads :
75
Origin country :
n/a
Vendor Threat Intelligence
Detection:
n/a
Link:
https://www.capesandbox.com/analysis/34280/
Detection(s):
SecuriteInfo.com.MSIL.Kryptik.VFR-1.UNOFFICIAL
Create hunting rule

Result
Verdict:
Malware
Maliciousness:

Behaviour
Creating a window
Creating a file in the %temp% directory
Launching a process
Creating a process with a hidden window
Deleting a recently created file
Unauthorized injection to a recently created process
Creating a file
Using the Windows Management Instrumentation requests
Result
Threat name:
AgentTesla
Create hunting rule
Detection:
malicious
Classification:
troj.spyw.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/401393
Signature
Antivirus / Scanner detection for submitted sample
Antivirus detection for dropped file
Contains functionality to register a low level keyboard hook
Hides that the sample has been downloaded from the Internet (zone.identifier)
Initial sample is a PE file and has a suspicious name
Injects a PE file into a foreign processes
Installs a global keyboard hook
Machine Learning detection for dropped file
Machine Learning detection for sample
Multi AV Scanner detection for dropped file
Multi AV Scanner detection for submitted 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)
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 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:
Download SVG
behaviorgraph top1 signatures2 2 Behavior Graph ID: 252927 Sample: purchase Order NO.8909w4vvy..exe Startdate: 29/07/2020 Architecture: WINDOWS Score: 100 41 Antivirus detection for dropped file 2->41 43 Antivirus / Scanner detection for submitted sample 2->43 45 Multi AV Scanner detection for dropped file 2->45 47 11 other signatures 2->47 7 Mymp4.exe 3 2->7         started        10 purchase Order NO.8909w4vvy..exe 7 2->10         started        13 Mymp4.exe 2 2->13         started        process3 file4 49 Antivirus detection for dropped file 7->49 51 Multi AV Scanner detection for dropped file 7->51 53 Queries sensitive network adapter information (via WMI, Win32_NetworkAdapter, often done to detect virtual machines) 7->53 57 3 other signatures 7->57 15 Mymp4.exe 2 7->15         started        33 C:\Users\user\AppData\...\&startupname&.exe, PE32 10->33 dropped 35 C:\Users\user\AppData\Local\...\tmp1625.tmp, XML 10->35 dropped 37 C:\...\&startupname&.exe:Zone.Identifier, ASCII 10->37 dropped 39 C:\...\purchase Order NO.8909w4vvy..exe.log, ASCII 10->39 dropped 55 Injects a PE file into a foreign processes 10->55 18 purchase Order NO.8909w4vvy..exe 2 5 10->18         started        21 schtasks.exe 1 10->21         started        23 Mymp4.exe 13->23         started        25 Mymp4.exe 13->25         started        signatures5 process6 file7 29 C:\Users\user\AppData\Roaming\...\Mymp4.exe, PE32 18->29 dropped 31 C:\Users\user\...\Mymp4.exe:Zone.Identifier, ASCII 18->31 dropped 59 Tries to steal Mail credentials (via file access) 18->59 61 Hides that the sample has been downloaded from the Internet (zone.identifier) 18->61 63 Installs a global keyboard hook 18->63 27 conhost.exe 21->27         started        65 Tries to harvest and steal ftp login credentials 23->65 67 Tries to harvest and steal browser information (history, passwords, etc) 23->67 signatures8 process9
Detection:
agenttesla
Create hunting rule
Link:
https://mwdb.cert.pl/sample/4c09fce4576481f55dcd4cffbe780d90867da332a6d86666831496fa33e36b84/
Threat name:
ByteCode-MSIL.Trojan.Kryptik
Create hunting rule
Status:
Malicious
First seen:
2020-07-28 23:22:22 UTC
AV detection:
22 of 27 (81.48%)
Threat level:
  5/5
Detection(s):
Malicious file
Link:
https://check.spamhaus.org/check/?searchterm=jqe7zzcxmsa7kxonjt7346anscdh3izsu3mgmzudcslpum7dnoca._file
Verdict:
malicious
Label(s):
agenttesla
Create hunting rule
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AgentTesla
+ 10'690 additional samples on MalwareBazaar
Result
Malware family:
agenttesla
Create hunting rule
Score:
  10/10
Tags:
keylogger trojan stealer spyware family:agenttesla persistence
Link:
https://tria.ge/reports/200729-qc25gpzmps/
Behaviour
Suspicious use of AdjustPrivilegeToken
Suspicious behavior: EnumeratesProcesses
Suspicious use of WriteProcessMemory
Suspicious use of SetWindowsHookEx
Creates scheduled task(s)
Suspicious use of SetThreadContext
Adds Run key to start application
Reads data files stored by FTP clients
Reads user/profile data of web browsers
Reads user/profile data of local email clients
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/4c09fce4576481f55dcd4cffbe780d90867da332a6d86666831496fa33e36b84

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 dcc41a696bd3a288bab35e1ee6448d6a9171514b2ad737257198a775a7b96dc6

AgentTesla

Executable exe 4c09fce4576481f55dcd4cffbe780d90867da332a6d86666831496fa33e36b84

(this sample)

  
Dropped by
MD5 181bfc51a912a8ef756ebccc7a8523db
  
Delivery method
Distributed via e-mail attachment
Cape
Cape
https://www.capesandbox.com/analysis/34280/
  
Dropped by
SHA256 dcc41a696bd3a288bab35e1ee6448d6a9171514b2ad737257198a775a7b96dc6

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