MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 55c46eca6b7b3d44afd9f09eab01429f08447da65ac74995dbc0a15793824614. 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: 55c46eca6b7b3d44afd9f09eab01429f08447da65ac74995dbc0a15793824614
SHA3-384 hash: 2d920a2ddaec18bbc43fd4371c333b41f6b6b3450d73db4f228e952801c51eb81fc0e26bce0d8ef77d0e697ab4c692f2
SHA1 hash: 8a5b12491fbab28caa2d19b2b9652c2cc2acab6c
MD5 hash: 00f60a589041dafd4151990ae2370d1b
humanhash: helium-kansas-summer-pennsylvania
File name:Universal290720.exe
Download: download sample
Signature AgentTesla
Create hunting rule
File size:614'400 bytes
First seen:2020-07-29 11:19:16 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:ZOghasA87bGfKfgmLI1p+dWFxbiTFW2IUBuC63btga:4gR7yfwCAW2Fav
Threatray 10'450 similar samples on MalwareBazaar
TLSH D4D4D019BB90FD1AC3FD8174E2EC9508CEFCC192916BD3256854A3EF1AC6393D9091B6
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: Universal290720.Z (contains "Universal290720.exe")

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

Intelligence

File Origin
# of uploads :
1
# of downloads :
72
Origin country :
n/a
Vendor Threat Intelligence
Detection:
n/a
Link:
https://www.capesandbox.com/analysis/34807/
Detection(s):
SecuriteInfo.com.MSIL.Kryptik.VFR-1.UNOFFICIAL
Create hunting rule

Result
Verdict:
Malware
Maliciousness:

Behaviour
Creating a window
Unauthorized injection to a recently created process
Creating a file
Using the Windows Management Instrumentation requests
Creating a file in the %AppData% subdirectories
Enabling autorun with the standard Software\Microsoft\Windows\CurrentVersion\Run registry branch
Moving of the original file
Result
Threat name:
AgentTesla
Create hunting rule
Detection:
malicious
Classification:
troj.spyw.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/402383
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)
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 dnsIp2 2 Behavior Graph ID: 253556 Sample: Universal290720.exe Startdate: 29/07/2020 Architecture: WINDOWS Score: 100 31 g.msn.com 2->31 33 asf-ris-prod-neurope.northeurope.cloudapp.azure.com 2->33 51 Found malware configuration 2->51 53 Yara detected AgentTesla 2->53 55 Yara detected AntiVM_3 2->55 57 Tries to detect sandboxes and other dynamic analysis tools (process name or module or function) 2->57 7 Universal290720.exe 1 2->7         started        10 YYtJku.exe 2->10         started        12 YYtJku.exe 1 2->12         started        signatures3 process4 signatures5 59 Queries sensitive network adapter information (via WMI, Win32_NetworkAdapter, often done to detect virtual machines) 7->59 61 Queries sensitive BIOS Information (via WMI, Win32_Bios & Win32_BaseBoard, often done to detect virtual machines) 7->61 63 Contains functionality to check if a debugger is running (CheckRemoteDebuggerPresent) 7->63 14 Universal290720.exe 2 5 7->14         started        19 YYtJku.exe 2 10->19         started        21 YYtJku.exe 10->21         started        23 YYtJku.exe 10->23         started        25 YYtJku.exe 2 12->25         started        process6 dnsIp7 35 mail.transfastc.com 108.167.160.43, 49732, 49745, 587 UNIFIEDLAYER-AS-1US United States 14->35 37 192.168.2.1 unknown unknown 14->37 27 C:\Users\user\AppData\Roaming\...\YYtJku.exe, PE32 14->27 dropped 29 C:\Users\user\...\YYtJku.exe:Zone.Identifier, ASCII 14->29 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 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/55c46eca6b7b3d44afd9f09eab01429f08447da65ac74995dbc0a15793824614/
Threat name:
ByteCode-MSIL.Trojan.Kryptik
Create hunting rule
Status:
Malicious
First seen:
2020-07-29 11:21:05 UTC
AV detection:
23 of 29 (79.31%)
Threat level:
  5/5
Detection(s):
Malicious file
Link:
https://check.spamhaus.org/check/?searchterm=kxcg5stlpm6ujl6z6cpkwakct4eei7nglldutfo3ycqvpe4ciyka._file
Verdict:
malicious
Label(s):
agenttesla
Create hunting rule
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AgentTesla
+ 10'440 additional samples on MalwareBazaar
Result
Malware family:
agenttesla
Create hunting rule
Score:
  10/10
Tags:
spyware keylogger trojan stealer family:agenttesla persistence
Link:
https://tria.ge/reports/200729-brqg7hsl6a/
Behaviour
Suspicious behavior: EnumeratesProcesses
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
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
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
AgentTesla
Score:
1.00
Link:
https://yomi.yoroi.company/submissions/55c46eca6b7b3d44afd9f09eab01429f08447da65ac74995dbc0a15793824614

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 4592f8ac4b3539ad7d45f196825220f76aa8be34708ba1384d554d3e700691cf

AgentTesla

Executable exe 55c46eca6b7b3d44afd9f09eab01429f08447da65ac74995dbc0a15793824614

(this sample)

  
Dropped by
MD5 ab4db76262c9bb0a1216ea637285368a
  
Delivery method
Distributed via e-mail attachment
  
Dropped by
SHA256 4592f8ac4b3539ad7d45f196825220f76aa8be34708ba1384d554d3e700691cf
Cape
Cape
https://www.capesandbox.com/analysis/34807/

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