MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 638603145c3aac570237325613344a3fd83bf2fc737ee5acd8230e0ee1afb0f5. 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
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SHA256 hash: 638603145c3aac570237325613344a3fd83bf2fc737ee5acd8230e0ee1afb0f5
SHA3-384 hash: 72d530d91ee7a2c300af91cf15314d1a7d538fa19809463613400033018a51453faa0319934ac6a875797198cc11f8af
SHA1 hash: 047605c15f2fa7421c7855e2410ae1de5a337a3f
MD5 hash: 463c68f81d7624d1a22aef526b98ff62
humanhash: kansas-alaska-oven-virginia
File name:our invoice.exe
Download: download sample
Signature AgentTesla
Create hunting rule
File size:664'064 bytes
First seen:2020-07-27 21:46:37 UTC
Last seen:2020-07-28 09:16:42 UTC
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'652 x AgentTesla, 19'463 x Formbook, 12'204 x SnakeKeylogger)
ssdeep 12288:fnaSVja/RjIC4XSNF4RTwpygyx9F3tlTB+OQ:fnntyf4XSN2wggyN3HB+
Threatray 10'651 similar samples on MalwareBazaar
TLSH 1BE425A365FC26EBE42827B86767024A0F257F35A9B3DE1D6DB5F8F42671F800152D02
Reporter jarumlus
Tags:AgentTesla

Intelligence

File Origin
# of uploads :
5
# of downloads :
82
Origin country :
n/a
Vendor Threat Intelligence
Detection:
n/a
Link:
https://www.capesandbox.com/analysis/33101/
Detection(s):
SecuriteInfo.com.Trojan.Inject3.45202.26593.27364.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
Creating a file
Using the Windows Management Instrumentation requests
Enabling autorun with Startup directory
Unauthorized injection to a system process
Result
Threat name:
AgentTesla
Create hunting rule
Detection:
malicious
Classification:
troj.adwa.spyw.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/399173
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
Machine Learning detection for dropped file
Machine Learning detection for sample
Modifies the hosts file
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 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: 251777 Sample: our invoice.exe Startdate: 28/07/2020 Architecture: WINDOWS Score: 100 56 Found malware configuration 2->56 58 Multi AV Scanner detection for dropped file 2->58 60 Sigma detected: Scheduled temp file as task from temp location 2->60 62 8 other signatures 2->62 8 our invoice.exe 7 2->8         started        11 oPLNOE.exe 2 2->11         started        13 oPLNOE.exe 1 2->13         started        process3 file4 36 C:\Users\user\AppData\...\Bfcsivpifds.exe, PE32 8->36 dropped 38 C:\Users\user\AppData\Local\...\tmpB67D.tmp, XML 8->38 dropped 40 C:\Users\...\Bfcsivpifds.exe:Zone.Identifier, ASCII 8->40 dropped 42 C:\Users\user\AppData\...\our invoice.exe.log, ASCII 8->42 dropped 15 RegSvcs.exe 2 4 8->15         started        20 schtasks.exe 1 8->20         started        22 conhost.exe 11->22         started        24 conhost.exe 13->24         started        process5 dnsIp6 44 daafco.com 50.87.202.136, 49720, 587 UNIFIEDLAYER-AS-1US United States 15->44 46 mail.daafco.com 15->46 32 C:\Users\user\AppData\Roaming\...\oPLNOE.exe, PE32 15->32 dropped 34 C:\Windows\System32\drivers\etc\hosts, ASCII 15->34 dropped 48 Tries to harvest and steal Putty / WinSCP information (sessions, passwords, etc) 15->48 50 Queries sensitive network adapter information (via WMI, Win32_NetworkAdapter, often done to detect virtual machines) 15->50 52 Tries to steal Mail credentials (via file access) 15->52 54 5 other signatures 15->54 26 reg.exe 1 15->26         started        28 conhost.exe 20->28         started        file7 signatures8 process9 process10 30 conhost.exe 26->30         started       
Detection:
agenttesla
Create hunting rule
Link:
https://mwdb.cert.pl/sample/638603145c3aac570237325613344a3fd83bf2fc737ee5acd8230e0ee1afb0f5/
Threat name:
ByteCode-MSIL.Trojan.AgentTesla
Create hunting rule
Status:
Malicious
First seen:
2020-07-27 00:34:34 UTC
AV detection:
22 of 29 (75.86%)
Threat level:
  5/5
Detection(s):
Malicious file
Link:
https://check.spamhaus.org/check/?searchterm=modagfc4hkwfoarxgjlbgnckh7mdx4x4on7ollgyemha5ynpwd2q._file
Verdict:
malicious
Label(s):
agenttesla
Create hunting rule
Similar samples:
2fc3c25b29d03e4e3167f874a453eb44212071490864e0134ca406ecf14d74a6
AgentTesla
5579e53b061e5c449ca231a05e84e0c90cceada35d9e4677e083ee77ffe8718b
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6e85d010198944cd284d9fdc636e1d690d6c77b2e1bfabbc41e1f8941ea72332
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75c50efa907178d38b65adee406a6758288f7f69299dd2c26bee91e738a175f3
AgentTesla
a37509a6354a72dd281648e71465962fb4d12ec51cb0ea796d92684a36996f75
AgentTesla
a96f314ef38951221b646a5798f3086f7a7320c7cc669fe33238db949a058b3f
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c65cd2032c06e0dbfb61b04e33aca937bafe18760001ec39aaa83be81e8e4697
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e3736b761f2b82e91cbb074ea1345a6e1e103bb9cb4e043ff17eeb1705c70c94
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e8019c082f5e72270bfba4138ea662483e6235ab5751332e3ad9120f9850b5bd
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eb09747d42fcf03baf1c3d844ac469062b354defcdd6300a8c051c96b3d144c3
AgentTesla
+ 10'641 additional samples on MalwareBazaar
Result
Malware family:
agenttesla
Create hunting rule
Score:
  10/10
Tags:
persistence spyware keylogger trojan stealer family:agenttesla
Link:
https://tria.ge/reports/200727-w6s4scjmts/
Behaviour
Suspicious use of WriteProcessMemory
Creates scheduled task(s)
Suspicious use of AdjustPrivilegeToken
Suspicious behavior: EnumeratesProcesses
Modifies registry key
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
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/638603145c3aac570237325613344a3fd83bf2fc737ee5acd8230e0ee1afb0f5

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 71579b74b92f12d3637d83ad3ad4eaa8654561d4523b2036c7ccbe6cfc0741c6

AgentTesla

Executable exe 638603145c3aac570237325613344a3fd83bf2fc737ee5acd8230e0ee1afb0f5

(this sample)

  
Dropped by
MD5 d6f17e87d6587cb392bf22a28fc6e2df
  
Dropped by
SHA256 71579b74b92f12d3637d83ad3ad4eaa8654561d4523b2036c7ccbe6cfc0741c6
  
Dropped by
AgentTesla
  
Delivery method
Distributed via e-mail attachment
Cape
Cape
https://www.capesandbox.com/analysis/33101/

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