MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 b1c6549b6f8357b0ca42b26fe2fa4e3cdfcf684b1d5446ca23500a9e3d7450be. 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: b1c6549b6f8357b0ca42b26fe2fa4e3cdfcf684b1d5446ca23500a9e3d7450be
SHA3-384 hash: 5b00861c1283fd6d521126bddc753fe783a9defce9994c61e7be2e303358ac4524335e30b34d7f05eeddb2535e9aafc3
SHA1 hash: af31b8e035993b09391354a114e11083ca604f3e
MD5 hash: 853889ea216163805e43631b57431da0
humanhash: princess-enemy-winner-equal
File name:Halkbank_Ekstre_29072020_084510_158517.PDF.exe
Download: download sample
Signature AgentTesla
Create hunting rule
File size:645'632 bytes
First seen:2020-07-29 11:14:38 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'652 x AgentTesla, 19'462 x Formbook, 12'204 x SnakeKeylogger)
ssdeep 12288:mMM3nsgDLL8ba9LTDEN0j1HB/23B5AELEBiy4loAa:3MRiaVXFphWAcumot
Threatray 10'579 similar samples on MalwareBazaar
TLSH F1D4C019B6A1EC16C2BE4535E2DC2118CFFCC1C7922BE349785792BB19CB3A7DA41172
Reporter abuse_ch
Tags:AgentTesla exe geo Halkbank TUR


Avatar
abuse_ch
Malspam distributing AgentTesla:

HELO: halkbank.com.tr
Sending IP: 84.234.96.141
From: halkbank<ekstre@halkbank.com.tr>
Subject: T.HALK BANKASI A.S. 29.07.2020 Hesap Ekstresi.
Attachment: Halkbank_Ekstre_29072020_084510_158517.PDF.r00 (contains "Halkbank_Ekstre_29072020_084510_158517.PDF.exe")

AgentTesla SMTP exfil server:
mail.parmanand.in:587

AgentTesla SMTP exfil email address:
admin@parmanand.in

Intelligence

File Origin
# of uploads :
1
# of downloads :
80
Origin country :
n/a
Vendor Threat Intelligence
Detection:
n/a
Link:
https://www.capesandbox.com/analysis/34794/
Detection(s):
SecuriteInfo.com.MSIL.Kryptik.VFR-1.UNOFFICIAL
Create hunting rule

Result
Verdict:
Malware
Maliciousness:

Behaviour
Creating a window
Launching a process
Creating a file
Using the Windows Management Instrumentation requests
Unauthorized injection to a system process
Changing the hosts file
Result
Threat name:
AgentTesla
Create hunting rule
Detection:
malicious
Classification:
troj.adwa.spyw.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/402349
Signature
Found malware configuration
Hides that the sample has been downloaded from the Internet (zone.identifier)
Initial sample is a PE file and has a suspicious name
Modifies the hosts 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: Capture Wi-Fi password
Snort IDS alert for network traffic (e.g. based on Emerging Threat rules)
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 harvest and steal WLAN passwords
Tries to steal Mail credentials (via file access)
Uses an obfuscated file name to hide its real file extension (double extension)
Uses netsh to modify the Windows network and firewall settings
Yara detected AgentTesla
Yara detected AntiVM_3
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 253535 Sample: Halkbank_Ekstre_29072020_08... Startdate: 29/07/2020 Architecture: WINDOWS Score: 100 34 g.msn.com 2->34 36 asf-ris-prod-neurope.northeurope.cloudapp.azure.com 2->36 54 Snort IDS alert for network traffic (e.g. based on Emerging Threat rules) 2->54 56 Found malware configuration 2->56 58 Sigma detected: Capture Wi-Fi password 2->58 60 7 other signatures 2->60 9 Halkbank_Ekstre_29072020_084510_158517.PDF.exe 1 2->9         started        11 YIroH.exe 2 2->11         started        13 YIroH.exe 1 2->13         started        signatures3 process4 process5 15 RegSvcs.exe 2 4 9->15         started        20 RegSvcs.exe 9->20         started        22 conhost.exe 11->22         started        24 conhost.exe 13->24         started        dnsIp6 38 parmanand.in 209.133.209.251, 49749, 587 HVC-ASUS United States 15->38 40 mail.parmanand.in 15->40 30 C:\Users\user\AppData\Roaming\...\YIroH.exe, PE32 15->30 dropped 32 C:\Windows\System32\drivers\etc\hosts, ASCII 15->32 dropped 42 Tries to harvest and steal Putty / WinSCP information (sessions, passwords, etc) 15->42 44 Tries to steal Mail credentials (via file access) 15->44 46 Tries to harvest and steal ftp login credentials 15->46 52 4 other signatures 15->52 26 netsh.exe 3 15->26         started        48 Queries sensitive network adapter information (via WMI, Win32_NetworkAdapter, often done to detect virtual machines) 20->48 50 Queries sensitive BIOS Information (via WMI, Win32_Bios & Win32_BaseBoard, often done to detect virtual machines) 20->50 file7 signatures8 process9 process10 28 conhost.exe 26->28         started       
Detection:
agenttesla
Create hunting rule
Link:
https://mwdb.cert.pl/sample/b1c6549b6f8357b0ca42b26fe2fa4e3cdfcf684b1d5446ca23500a9e3d7450be/
Threat name:
ByteCode-MSIL.Trojan.Kryptik
Create hunting rule
Status:
Malicious
First seen:
2020-07-29 11:16:08 UTC
AV detection:
23 of 28 (82.14%)
Threat level:
  5/5
Detection(s):
Malicious file
Link:
https://check.spamhaus.org/check/?searchterm=whdfjg3pqnl3bsscwjx6f6sohtp462cldvkensrdkafj4plukc7a._file
Verdict:
malicious
Label(s):
agenttesla
Create hunting rule
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AgentTesla
+ 10'569 additional samples on MalwareBazaar
Result
Malware family:
agenttesla
Create hunting rule
Score:
  10/10
Tags:
spyware keylogger trojan stealer family:agenttesla persistence
Link:
https://tria.ge/reports/200729-cc4kwml1v6/
Behaviour
Suspicious behavior: EnumeratesProcesses
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
Suspicious use of SetThreadContext
Modifies service
Adds Run key to start application
Reads user/profile data of web browsers
Reads data files stored by FTP clients
Reads user/profile data of local email clients
Drops file in Drivers directory
AgentTesla
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Kryptik
Score:
1.00
Link:
https://yomi.yoroi.company/submissions/b1c6549b6f8357b0ca42b26fe2fa4e3cdfcf684b1d5446ca23500a9e3d7450be

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

r00 587388f09f7ef0865ee45ca44f42c2089a6071ee3e884f3e7447a5dc99824126

AgentTesla

Executable exe b1c6549b6f8357b0ca42b26fe2fa4e3cdfcf684b1d5446ca23500a9e3d7450be

(this sample)

  
Dropped by
MD5 02d187b2ae7038eef53fcbc40ae536eb
  
Delivery method
Distributed via e-mail attachment
  
Dropped by
SHA256 587388f09f7ef0865ee45ca44f42c2089a6071ee3e884f3e7447a5dc99824126
Cape
Cape
https://www.capesandbox.com/analysis/34794/

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