MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 488f6d96266434b8a189858b20fc315242d390c0c0b50ca62c9571194f75fcf0. 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: 488f6d96266434b8a189858b20fc315242d390c0c0b50ca62c9571194f75fcf0
SHA3-384 hash: 16d3b24d0a1095102c5e8e0dce7d9de26d6addeac0a18fe48fc91325db8a09062db600bcd60341b5988b3bdabac70348
SHA1 hash: dabe9a75e6fc6849f7ac10c516ccd8d1b2bc4f20
MD5 hash: eab3fe7147d618742b164532eb1fd98b
humanhash: west-network-california-uniform
File name:Bank letter.exe
Download: download sample
Signature AgentTesla
Create hunting rule
File size:892'416 bytes
First seen:2020-08-04 13:37:55 UTC
Last seen:2020-08-04 15:22:05 UTC
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'666 x AgentTesla, 19'479 x Formbook, 12'209 x SnakeKeylogger)
ssdeep 24576:TTHIYxPeVZl1sN0HO19LMtfLn+oT+pkV:TTHIPVj1sDzMNL+hkV
Threatray 10'674 similar samples on MalwareBazaar
TLSH 6815BFC5F5409D50DC2A4A3B4D3348928B33AD6BEF02D607349CB6596BF72866A35F83
Reporter abuse_ch
Tags:AgentTesla exe


Avatar
abuse_ch
Malspam distributing AgentTesla:

HELO: srv.idxdnszone107.com
Sending IP: 54.36.51.187
From: Elena Liu <jreed@worldrunsevents.com>
Subject: REMITTANCE BANK LETTER
Attachment: Bank letter.7z (contains "Bank letter.exe")

Intelligence

File Origin
# of uploads :
2
# of downloads :
79
Origin country :
n/a
Vendor Threat Intelligence
Detection:
n/a
Link:
https://www.capesandbox.com/analysis/38746/
Detection(s):
SecuriteInfo.com.CIL.HeapOverride.Heur.24641.UNOFFICIAL
Create hunting rule

Result
Verdict:
Malware
Maliciousness:

Behaviour
Sending a UDP request
Creating a window
Creating a file in the %AppData% directory
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
Enabling autorun by creating a file
Result
Threat name:
AgentTesla
Create hunting rule
Detection:
malicious
Classification:
troj.spyw.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/409528
Signature
Found malware configuration
Hides that the sample has been downloaded from the Internet (zone.identifier)
Injects a PE file into a foreign processes
Machine Learning detection for dropped file
Machine Learning detection for sample
Moves itself to temp directory
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:
Download SVG
behaviorgraph top1 signatures2 2 Behavior Graph ID: 257048 Sample: Bank letter.exe Startdate: 04/08/2020 Architecture: WINDOWS Score: 100 62 Found malware configuration 2->62 64 Sigma detected: Scheduled temp file as task from temp location 2->64 66 Yara detected AgentTesla 2->66 68 7 other signatures 2->68 7 Bank letter.exe 5 2->7         started        11 YYtJku.exe 3 2->11         started        13 YYtJku.exe 2->13         started        process3 file4 40 C:\Users\user\AppData\...\lgBDFLOUIjYibO.exe, PE32 7->40 dropped 42 C:\...\lgBDFLOUIjYibO.exe:Zone.Identifier, ASCII 7->42 dropped 44 C:\Users\user\AppData\Local\...\tmp6868.tmp, XML 7->44 dropped 46 C:\Users\user\AppData\...\Bank letter.exe.log, ASCII 7->46 dropped 70 Injects a PE file into a foreign processes 7->70 15 Bank letter.exe 2 5 7->15         started        20 schtasks.exe 1 7->20         started        72 Queries sensitive network adapter information (via WMI, Win32_NetworkAdapter, often done to detect virtual machines) 11->72 74 Machine Learning detection for dropped file 11->74 76 Queries sensitive BIOS Information (via WMI, Win32_Bios & Win32_BaseBoard, often done to detect virtual machines) 11->76 22 YYtJku.exe 2 11->22         started        24 schtasks.exe 1 11->24         started        26 schtasks.exe 13->26         started        28 YYtJku.exe 13->28         started        signatures5 process6 dnsIp7 48 us2.smtp.mailhostbox.com 208.91.198.143, 49725, 49734, 587 PUBLIC-DOMAIN-REGISTRYUS United States 15->48 36 C:\Users\user\AppData\Roaming\...\YYtJku.exe, PE32 15->36 dropped 38 C:\Users\user\...\YYtJku.exe:Zone.Identifier, ASCII 15->38 dropped 50 Tries to harvest and steal Putty / WinSCP information (sessions, passwords, etc) 15->50 52 Moves itself to temp directory 15->52 54 Tries to steal Mail credentials (via file access) 15->54 30 conhost.exe 20->30         started        56 Tries to harvest and steal ftp login credentials 22->56 58 Tries to harvest and steal browser information (history, passwords, etc) 22->58 60 Hides that the sample has been downloaded from the Internet (zone.identifier) 22->60 32 conhost.exe 24->32         started        34 conhost.exe 26->34         started        file8 signatures9 process10
Detection:
agenttesla
Create hunting rule
Link:
https://mwdb.cert.pl/sample/488f6d96266434b8a189858b20fc315242d390c0c0b50ca62c9571194f75fcf0/
Threat name:
ByteCode-MSIL.Trojan.AgentTesla
Create hunting rule
Status:
Malicious
First seen:
2020-08-04 13:39:07 UTC
AV detection:
25 of 29 (86.21%)
Threat level:
  5/5
Detection(s):
Malicious file
Link:
https://check.spamhaus.org/check/?searchterm=jchw3frgmq2lrimjqwfsb7brkjbnhegayc2qzjrmsvyrst3v7tya._file
Verdict:
malicious
Label(s):
agenttesla
Create hunting rule
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AgentTesla
+ 10'664 additional samples on MalwareBazaar
Result
Malware family:
agenttesla
Create hunting rule
Score:
  10/10
Tags:
keylogger stealer persistence spyware trojan family:agenttesla
Link:
https://tria.ge/reports/200804-chspmx1zjj/
Behaviour
Creates scheduled task(s)
Suspicious behavior: EnumeratesProcesses
Suspicious use of WriteProcessMemory
Suspicious use of AdjustPrivilegeToken
Suspicious behavior: RenamesItself
Suspicious use of SetThreadContext
Adds Run key to start application
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
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/488f6d96266434b8a189858b20fc315242d390c0c0b50ca62c9571194f75fcf0

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

7z 2049f6d085bab27a4013ed7832b1d8ff486d578f94dc9d3586be96f0b4596578

AgentTesla

Executable exe 488f6d96266434b8a189858b20fc315242d390c0c0b50ca62c9571194f75fcf0

(this sample)

  
Dropped by
MD5 7ca105d8d4f24716311eaa03df83736b
  
Delivery method
Distributed via e-mail attachment
Cape
Cape
https://www.capesandbox.com/analysis/38746/
  
Dropped by
SHA256 2049f6d085bab27a4013ed7832b1d8ff486d578f94dc9d3586be96f0b4596578

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