MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 55a99c172ecc21abb477851da63336dbc01c67bc90f11d08dacd3ac2995e82be. 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: 8


Intelligence 8 IOCs YARA 3 File information Comments
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SHA256 hash: 55a99c172ecc21abb477851da63336dbc01c67bc90f11d08dacd3ac2995e82be
SHA3-384 hash: 2686725ac7991f65d6a226b4357110417e527cd7c1f2a7dea7272cd1726f756ad84644634fdfcfa9c242e971d057efda
SHA1 hash: cd4ecfb91c6504bd8fe2da366298a28877f4da9a
MD5 hash: 29e84bff08f40b0ad47e415e284c2b6d
humanhash: carbon-cat-kitten-berlin
File name:Commerical invoice.exe
Download: download sample
Signature AgentTesla
Create hunting rule
File size:485'888 bytes
First seen:2020-08-11 20:38:06 UTC
Last seen:2020-08-11 21:32:51 UTC
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:SA4ZQ1TJQgxiu04ufesmQFMD46ReE2IogrpiA:79mWiu04EmQFM86ReteQA
Threatray 10'828 similar samples on MalwareBazaar
TLSH 64A412A52BBC6B16CEED47F4445E394017386F1AAE62F7540E5274F31273B801A91FA3
Reporter jarumlus
Tags:AgentTesla

Intelligence

File Origin
# of uploads :
2
# of downloads :
72
Origin country :
n/a
Vendor Threat Intelligence
Detection:
n/a
Link:
https://www.capesandbox.com/analysis/43747/
Detection(s):
SecuriteInfo.com.Trojan.Siggen10.3130.27674.23693.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
Creating a file
Using the Windows Management Instrumentation requests
Forced shutdown of a system process
Enabling autorun by creating a file
Unauthorized injection to a system process
Result
Threat name:
AgentTesla
Create hunting rule
Detection:
malicious
Classification:
troj.spyw.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/420381
Signature
Contains functionality to check if a debugger is running (CheckRemoteDebuggerPresent)
Executable has a suspicious name (potential lure to open the executable)
Found malware configuration
Initial sample is a PE file and has a suspicious name
Machine Learning detection for dropped file
Machine Learning detection for sample
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: MSBuild connects to smtp port
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: 262515 Sample: Commerical invoice.exe Startdate: 12/08/2020 Architecture: WINDOWS Score: 100 32 Found malware configuration 2->32 34 Sigma detected: Scheduled temp file as task from temp location 2->34 36 Yara detected AgentTesla 2->36 38 9 other signatures 2->38 7 Commerical invoice.exe 5 2->7         started        process3 file4 20 C:\Users\user\AppData\...20OBmSmPCwYqK.exe, PE32 7->20 dropped 22 C:\Users\...22OBmSmPCwYqK.exe:Zone.Identifier, ASCII 7->22 dropped 24 C:\Users\user\AppData\Local\...\tmp8952.tmp, XML 7->24 dropped 26 C:\Users\user\...\Commerical invoice.exe.log, ASCII 7->26 dropped 10 MSBuild.exe 2 7->10         started        14 MSBuild.exe 7->14         started        16 schtasks.exe 1 7->16         started        process5 dnsIp6 28 smtp.yandex.ru 77.88.21.158, 49753, 587 YANDEXRU Russian Federation 10->28 30 smtp.yandex.com 10->30 40 Tries to steal Mail credentials (via file access) 10->40 42 Tries to harvest and steal ftp login credentials 10->42 44 Tries to harvest and steal browser information (history, passwords, etc) 10->44 46 Queries sensitive network adapter information (via WMI, Win32_NetworkAdapter, often done to detect virtual machines) 14->46 48 Queries sensitive BIOS Information (via WMI, Win32_Bios & Win32_BaseBoard, often done to detect virtual machines) 14->48 18 conhost.exe 16->18         started        signatures7 process8
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/55a99c172ecc21abb477851da63336dbc01c67bc90f11d08dacd3ac2995e82be/
Threat name:
ByteCode-MSIL.Trojan.Kryptik
Create hunting rule
Status:
Malicious
First seen:
2020-08-11 01:29:04 UTC
AV detection:
24 of 29 (82.76%)
Threat level:
  5/5
Detection(s):
Malicious file
Link:
https://check.spamhaus.org/check/?searchterm=kwuzyfzozqq2xndxquo2mmzw3pabyz54sdyr2cg2zu5mfgk6qk7a._file
Verdict:
malicious
Label(s):
agenttesla
Create hunting rule
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0a6b52ec47bedcc73a84174c590088452c564354e09c334733f5d67132a788e1
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12846f275b6c95522b1b02433f0b11ea979cc328e0ea607c9d706b222d6ebd5a
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70c55a5a84bdd13e20d21b9eb88963c38c9e4157995db0aabb3956b5eeb02dce
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7ba4bab9ee682598fdfb031a1fa88105eaa1ff29a3d7c3e053a2c69e6b496660
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9241956eb6748031c6081171d747655373ffe236153dd901a663a3d24b9bf38c
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9b31ec2416aaf3b9d3490dc46a2b4a925f42165685b4adf828289dade16c5205
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e076a635a79ff083ab709a7977c459047cb644cb73e817ff67aa5e1cecf9233d
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ea05af63c09f44e18eb01715faa91ac4b9c64199b07a4973f0dd7a530f811193
AgentTesla
+ 10'818 additional samples on MalwareBazaar
Result
Malware family:
agenttesla
Create hunting rule
Score:
  10/10
Tags:
keylogger stealer spyware trojan family:agenttesla
Link:
https://tria.ge/reports/200811-d2nyhh7dc6/
Behaviour
Creates scheduled task(s)
Suspicious behavior: EnumeratesProcesses
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
Suspicious use of SetThreadContext
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/55a99c172ecc21abb477851da63336dbc01c67bc90f11d08dacd3ac2995e82be

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

rar 8306f3cdd40467e2c851d850e7d8850add41b732a57382562ae9f8b949abc5dc

AgentTesla

Executable exe 55a99c172ecc21abb477851da63336dbc01c67bc90f11d08dacd3ac2995e82be

(this sample)

  
Dropped by
MD5 cf9d434e0b5911dca988ff2b3ca43f41
  
Dropped by
SHA256 8306f3cdd40467e2c851d850e7d8850add41b732a57382562ae9f8b949abc5dc
  
Dropped by
AgentTesla
  
Delivery method
Distributed via e-mail attachment
Cape
Cape
https://www.capesandbox.com/analysis/43747/

Comments