MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 57c5d9b907c60dfa4ab6c08d01639b4ab353b60b6af84b251a6763084c3b30ff. 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: 57c5d9b907c60dfa4ab6c08d01639b4ab353b60b6af84b251a6763084c3b30ff
SHA3-384 hash: de9b75446b72e1c4ddf50e7b6309161674b94b16c44c5afe6bdf3893ad77e5579bf58f8e54961348e4dcc601c6eba2b4
SHA1 hash: 83f51706326988a3c0bb36ef65a703f2d8f6e96d
MD5 hash: d5c253e8fb9d22950a1f8274891b6e59
humanhash: shade-alanine-october-pennsylvania
File name:yT0F77cRyRuy2qj.exe
Download: download sample
Signature AgentTesla
Create hunting rule
File size:712'704 bytes
First seen:2020-08-10 13:16:08 UTC
Last seen:2020-08-10 14:03:24 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:tOaNhx3Q4heptr8IMcETTOH3+fUeRbbTUDh3grpiAWsdEXckjQc:EaNT3Q4her4IMcETCHufUe6QQA1kjB
Threatray 10'676 similar samples on MalwareBazaar
TLSH 65E4D4C61F8A7E85D3E50331EF3EF6B0C318BE2D17978A799A81B15E307A2537485690
Reporter abuse_ch
Tags:AgentTesla exe


Avatar
abuse_ch
Malspam distributing AgentTesla:

HELO: vie01a-dmta-ch01-3.mx.upcmail.net
Sending IP: 84.116.36.93
From: sampex@hispeed.ch sampex@hispeed.ch <sampex@hispeed.ch>
Subject: Dear Sir/Madam,
Attachment: Purchase Order.rar (contains "yT0F77cRyRuy2qj.exe")

Intelligence

File Origin
# of uploads :
2
# of downloads :
78
Origin country :
n/a
Vendor Threat Intelligence
Detection:
n/a
Link:
https://www.capesandbox.com/analysis/42792/
Detection(s):
SecuriteInfo.com.Trojan.PackedNET.406.518.3466.UNOFFICIAL
Create hunting rule

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/416990
Signature
Contains functionality to check if a debugger is running (CheckRemoteDebuggerPresent)
Contains functionality to register a low level keyboard hook
Found malware configuration
Hides that the sample has been downloaded from the Internet (zone.identifier)
Injects a PE file into a foreign processes
Installs a global keyboard hook
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)
Snort IDS alert for network traffic (e.g. based on Emerging Threat rules)
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: 260673 Sample: yT0F77cRyRuy2qj.exe Startdate: 10/08/2020 Architecture: WINDOWS Score: 100 53 Snort IDS alert for network traffic (e.g. based on Emerging Threat rules) 2->53 55 Found malware configuration 2->55 57 Yara detected AgentTesla 2->57 59 3 other signatures 2->59 6 yT0F77cRyRuy2qj.exe 3 2->6         started        10 newapp.exe 3 2->10         started        12 newapp.exe 2 2->12         started        process3 file4 27 C:\Users\user\...\yT0F77cRyRuy2qj.exe.log, ASCII 6->27 dropped 61 Queries sensitive network adapter information (via WMI, Win32_NetworkAdapter, often done to detect virtual machines) 6->61 63 Queries sensitive BIOS Information (via WMI, Win32_Bios & Win32_BaseBoard, often done to detect virtual machines) 6->63 65 Contains functionality to register a low level keyboard hook 6->65 69 2 other signatures 6->69 14 yT0F77cRyRuy2qj.exe 2 5 6->14         started        67 Machine Learning detection for dropped file 10->67 19 newapp.exe 2 10->19         started        21 newapp.exe 12->21         started        23 newapp.exe 12->23         started        25 newapp.exe 12->25         started        signatures5 process6 dnsIp7 33 smtp.annlap.com 14->33 35 us2.smtp.mailhostbox.com 208.91.199.223, 49742, 587 PUBLIC-DOMAIN-REGISTRYUS United States 14->35 29 C:\Users\user\AppData\Roaming\...\newapp.exe, PE32 14->29 dropped 31 C:\Users\user\...\newapp.exe:Zone.Identifier, ASCII 14->31 dropped 41 Hides that the sample has been downloaded from the Internet (zone.identifier) 14->41 43 Installs a global keyboard hook 14->43 37 208.91.199.224, 49744, 587 PUBLIC-DOMAIN-REGISTRYUS United States 19->37 39 smtp.annlap.com 19->39 45 Tries to harvest and steal Putty / WinSCP information (sessions, passwords, etc) 19->45 47 Tries to steal Mail credentials (via file access) 19->47 49 Tries to harvest and steal ftp login credentials 19->49 51 Tries to harvest and steal browser information (history, passwords, etc) 19->51 file8 signatures9
Detection:
agenttesla
Create hunting rule
Link:
https://mwdb.cert.pl/sample/57c5d9b907c60dfa4ab6c08d01639b4ab353b60b6af84b251a6763084c3b30ff/
Threat name:
ByteCode-MSIL.Backdoor.Remcos
Create hunting rule
Status:
Malicious
First seen:
2020-08-10 13:18:07 UTC
AV detection:
20 of 27 (74.07%)
Threat level:
  5/5
Detection(s):
Malicious file
Link:
https://check.spamhaus.org/check/?searchterm=k7c5toihyyg7usvwycgqcy43jkzvhnqlnl4ewji2m5rqqtb3gd7q._file
Verdict:
malicious
Label(s):
agenttesla
Create hunting rule
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AgentTesla
+ 10'666 additional samples on MalwareBazaar
Result
Malware family:
agenttesla
Create hunting rule
Score:
  10/10
Tags:
keylogger stealer spyware trojan family:agenttesla persistence
Link:
https://tria.ge/reports/200810-peq8f9rva6/
Behaviour
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
Suspicious behavior: EnumeratesProcesses
Suspicious use of SetWindowsHookEx
Suspicious use of SetThreadContext
Adds Run key to start application
Reads user/profile data of web browsers
Reads user/profile data of local email clients
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/57c5d9b907c60dfa4ab6c08d01639b4ab353b60b6af84b251a6763084c3b30ff

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 56bd7b50b401d310780351bb3ac1fcfdbf9a47fce429ee9e8dda961ac1e5758f

AgentTesla

Executable exe 57c5d9b907c60dfa4ab6c08d01639b4ab353b60b6af84b251a6763084c3b30ff

(this sample)

  
Dropped by
MD5 04dc81648aaf6dac36d5a9bd149aa0fe
  
Delivery method
Distributed via e-mail attachment
Cape
Cape
https://www.capesandbox.com/analysis/42792/
  
Dropped by
SHA256 56bd7b50b401d310780351bb3ac1fcfdbf9a47fce429ee9e8dda961ac1e5758f

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