MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 a78982f275b83bfca636dca08c404c5952fbf86cba13813fb6d5e2f12ff60986. 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
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: a78982f275b83bfca636dca08c404c5952fbf86cba13813fb6d5e2f12ff60986
SHA3-384 hash: cbf40ba48166b64e2b5f60d23927ed2290cb6aa3b02d64e7595c65fd64f6791fd939c921ef009d1ae7cb4defc2d7b828
SHA1 hash: 3f7fbe8fb58f4ed51a5ef2aca94ca6f783cba8fe
MD5 hash: f8fd00da4cff6984403946ddefebc4f2
humanhash: glucose-double-colorado-chicken
File name:bank transfer.exe
Download: download sample
Signature AgentTesla
Create hunting rule
File size:536'576 bytes
First seen:2020-08-07 13:27:56 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:zYzEyyuQgrpiA/S1a2Bdk8HvW6dtq4alYIWpH30CBY+HoEqI:cLRQAevol63qtYtks
Threatray 10'978 similar samples on MalwareBazaar
TLSH 5DB4D05876ACB78EC4EB8E364A7C3D109A31B4275A3BD307718722594D1EBD98E107E3
Reporter abuse_ch
Tags:AgentTesla exe


Avatar
abuse_ch
Malspam distributing AgentTesla:

HELO: abaad.om
Sending IP: 37.49.230.200
From: Syamkumar Korat <syam.kumar@abaad.om>
Subject: Bank Transfer Advice
Attachment: bank transfer.Z (contains "bank transfer.exe")

AgentTesla SMTP exfil server:
mail.threewaystoharems.com:587

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/41659/
Result
Verdict:
Malware
Maliciousness:

Behaviour
Creating a window
Sending a UDP request
Unauthorized injection to a recently created process
Creating a file
Using the Windows Management Instrumentation requests
Result
Threat name:
AgentTesla
Create hunting rule
Detection:
malicious
Classification:
troj.spyw.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/415326
Signature
Contains functionality to check if a debugger is running (CheckRemoteDebuggerPresent)
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)
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)
Yara detected AgentTesla
Yara detected AntiVM_3
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 signatures2 2 Behavior Graph ID: 259923 Sample: bank transfer.exe Startdate: 07/08/2020 Architecture: WINDOWS Score: 100 51 Found malware configuration 2->51 53 Yara detected AgentTesla 2->53 55 Yara detected AntiVM_3 2->55 57 4 other signatures 2->57 6 bank transfer.exe 3 2->6         started        10 YYtJku.exe 2 2->10         started        12 YYtJku.exe 3 2->12         started        process3 file4 27 C:\Users\user\...\bank transfer.exe.log, ASCII 6->27 dropped 59 Injects a PE file into a foreign processes 6->59 14 bank transfer.exe 2 5 6->14         started        19 YYtJku.exe 10->19         started        61 Queries sensitive network adapter information (via WMI, Win32_NetworkAdapter, often done to detect virtual machines) 12->61 63 Machine Learning detection for dropped file 12->63 65 Queries sensitive BIOS Information (via WMI, Win32_Bios & Win32_BaseBoard, often done to detect virtual machines) 12->65 67 Contains functionality to check if a debugger is running (CheckRemoteDebuggerPresent) 12->67 21 YYtJku.exe 2 12->21         started        23 YYtJku.exe 12->23         started        25 YYtJku.exe 12->25         started        signatures5 process6 dnsIp7 33 threewaystoharems.com 192.254.236.251, 49743, 49744, 587 UNIFIEDLAYER-AS-1US United States 14->33 35 mail.threewaystoharems.com 14->35 29 C:\Users\user\AppData\Roaming\...\YYtJku.exe, PE32 14->29 dropped 31 C:\Users\user\...\YYtJku.exe:Zone.Identifier, ASCII 14->31 dropped 39 Tries to harvest and steal Putty / WinSCP information (sessions, passwords, etc) 14->39 41 Moves itself to temp directory 14->41 43 Tries to steal Mail credentials (via file access) 14->43 37 mail.threewaystoharems.com 19->37 45 Tries to harvest and steal ftp login credentials 19->45 47 Tries to harvest and steal browser information (history, passwords, etc) 19->47 49 Hides that the sample has been downloaded from the Internet (zone.identifier) 19->49 file8 signatures9
Detection:
agenttesla
Create hunting rule
Link:
https://mwdb.cert.pl/sample/a78982f275b83bfca636dca08c404c5952fbf86cba13813fb6d5e2f12ff60986/
Threat name:
ByteCode-MSIL.Trojan.Kryptik
Create hunting rule
Status:
Malicious
First seen:
2020-08-07 13:29:11 UTC
AV detection:
24 of 29 (82.76%)
Threat level:
  5/5
Detection(s):
Malicious file
Link:
https://check.spamhaus.org/check/?searchterm=u6eyf4tvxa57zjrw3sqiyqcmlfjpx6dmxijycp5w2xrpcl7wbgda._file
Verdict:
malicious
Label(s):
agenttesla
Create hunting rule
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AgentTesla
+ 10'968 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/200807-zb1pcl1ed6/
Behaviour
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
Suspicious behavior: RenamesItself
Suspicious behavior: EnumeratesProcesses
Suspicious use of SetThreadContext
Adds Run key to start application
Reads user/profile data of local email clients
Reads user/profile data of web browsers
Reads data files stored by FTP clients
AgentTesla Payload
AgentTesla
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Suspicious File
Score:
0.45
Link:
https://yomi.yoroi.company/submissions/a78982f275b83bfca636dca08c404c5952fbf86cba13813fb6d5e2f12ff60986

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

z 0affaf2fb7d456ec4a5b5d71284ca20a79f6441deb4f86dae15649557dd7f62f

AgentTesla

Executable exe a78982f275b83bfca636dca08c404c5952fbf86cba13813fb6d5e2f12ff60986

(this sample)

  
Dropped by
MD5 fb4cd002ccf15d341fffebb0a42af274
  
Delivery method
Distributed via e-mail attachment
Cape
Cape
https://www.capesandbox.com/analysis/41659/
  
Dropped by
SHA256 0affaf2fb7d456ec4a5b5d71284ca20a79f6441deb4f86dae15649557dd7f62f

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