MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 871ee6e52c48688d8eac4796f5d3c6f1b36c659d6cf9b1589c05a1ba7171ee90. 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: 871ee6e52c48688d8eac4796f5d3c6f1b36c659d6cf9b1589c05a1ba7171ee90
SHA3-384 hash: 18a3cc76bf5484151dabc0b94ba5f0e0c9e6079142ef02ac742be3d46e0f58b59a5fd17846eba62c80bc1536627c2ead
SHA1 hash: 4f7200daec58dc85eea47123527cd840eff37f39
MD5 hash: 8562220b7236b68c3a78350665b46b6b
humanhash: bulldog-twelve-hawaii-yankee
File name:Invoice.pdf.exe
Download: download sample
Signature AgentTesla
Create hunting rule
File size:584'192 bytes
First seen:2020-08-31 08:27:34 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'657 x AgentTesla, 19'468 x Formbook, 12'206 x SnakeKeylogger)
ssdeep 12288:czgG4Z2WKlJ6usdI6L6uYNBigwEfBFXtQB68XPmGUZ0gDiDC60hp7o6T+oNZqF4:24Ol4Pt6uowEXtut/mr0
Threatray 9'658 similar samples on MalwareBazaar
TLSH 22C4122032AC8BA3CBF649F600AD7D9AD3D05933745ECBCDB89A7196C2F57484326953
Reporter abuse_ch
Tags:AgentTesla exe


Avatar
abuse_ch
Malspam distributing AgentTesla:

HELO: gyp.gr
Sending IP: 46.227.62.27
From: DH CHONG <info@dorringolab.com>
Subject: Invoice Re-Confirmation
Attachment: Invoice.pdf.7z (contains "Invoice.pdf.exe")

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/53301/
Detection(s):
SecuriteInfo.com.W32.Trojan-7.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
Creating a file in the %AppData% subdirectories
Reading critical registry keys
Enabling autorun with the standard Software\Microsoft\Windows\CurrentVersion\Run registry branch
Moving of the original file
Stealing user critical data
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/455020
Signature
.NET source code contains potential unpacker
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
Injects a PE file into a foreign processes
Moves itself to temp directory
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
Sigma detected: Suspicious Double Extension
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 an obfuscated file name to hide its real file extension (double extension)
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: 279885 Sample: Invoice.pdf.exe Startdate: 31/08/2020 Architecture: WINDOWS Score: 100 60 Found malware configuration 2->60 62 Multi AV Scanner detection for dropped file 2->62 64 Sigma detected: Scheduled temp file as task from temp location 2->64 66 9 other signatures 2->66 7 Invoice.pdf.exe 4 2->7         started        11 YYtJku.exe 3 2->11         started        13 YYtJku.exe 2->13         started        process3 file4 36 C:\Users\user\AppData\...\hNwjHAxtQShsWp.exe, PE32 7->36 dropped 38 C:\Users\user\AppData\Local\...\tmp652D.tmp, XML 7->38 dropped 40 C:\Users\user\AppData\...\Invoice.pdf.exe.log, ASCII 7->40 dropped 68 Queries sensitive network adapter information (via WMI, Win32_NetworkAdapter, often done to detect virtual machines) 7->68 70 Queries sensitive BIOS Information (via WMI, Win32_Bios & Win32_BaseBoard, often done to detect virtual machines) 7->70 72 Injects a PE file into a foreign processes 7->72 15 Invoice.pdf.exe 2 5 7->15         started        20 schtasks.exe 1 7->20         started        74 Multi AV Scanner detection for dropped file 11->74 22 YYtJku.exe 2 11->22         started        24 schtasks.exe 1 11->24         started        26 YYtJku.exe 11->26         started        signatures5 process6 dnsIp7 42 smtp.yandex.ru 77.88.21.158, 49734, 49739, 587 YANDEXRU Russian Federation 15->42 44 smtp.yandex.com 15->44 32 C:\Users\user\AppData\Roaming\...\YYtJku.exe, PE32 15->32 dropped 34 C:\Users\user\...\YYtJku.exe:Zone.Identifier, ASCII 15->34 dropped 48 Tries to harvest and steal Putty / WinSCP information (sessions, passwords, etc) 15->48 50 Moves itself to temp directory 15->50 52 Tries to steal Mail credentials (via file access) 15->52 54 Hides that the sample has been downloaded from the Internet (zone.identifier) 15->54 28 conhost.exe 20->28         started        46 smtp.yandex.com 22->46 56 Tries to harvest and steal ftp login credentials 22->56 58 Tries to harvest and steal browser information (history, passwords, etc) 22->58 30 conhost.exe 24->30         started        file8 signatures9 process10
Detection:
agenttesla
Create hunting rule
Link:
https://mwdb.cert.pl/sample/871ee6e52c48688d8eac4796f5d3c6f1b36c659d6cf9b1589c05a1ba7171ee90/
Threat name:
ByteCode-MSIL.Trojan.Kryptik
Create hunting rule
Status:
Malicious
First seen:
2020-08-31 02:13:46 UTC
AV detection:
25 of 29 (86.21%)
Threat level:
  5/5
Detection(s):
Malicious file
Link:
https://check.spamhaus.org/check/?searchterm=q4ponzjmjbui3dvmi6lplu6g6gzwyzm5nt43cwe4awq3u4lr52ia._file
Verdict:
malicious
Label(s):
agenttesla
Create hunting rule
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AgentTesla
+ 9'648 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/200831-vqq9p2g246/
Behaviour
Creates scheduled task(s)
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: RenamesItself
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
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/871ee6e52c48688d8eac4796f5d3c6f1b36c659d6cf9b1589c05a1ba7171ee90

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 4e78f6147264f80b93ec7a4323cf8996d8dfb1c30583b5dfc8554c5bfc253c60

AgentTesla

Executable exe 871ee6e52c48688d8eac4796f5d3c6f1b36c659d6cf9b1589c05a1ba7171ee90

(this sample)

  
Dropped by
MD5 c89e6cbb3d5a6e7ebbcc4531bbb637f7
  
Delivery method
Distributed via e-mail attachment
Cape
Cape
https://www.capesandbox.com/analysis/53301/
  
Dropped by
SHA256 4e78f6147264f80b93ec7a4323cf8996d8dfb1c30583b5dfc8554c5bfc253c60

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