MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 a8f804c2312a502e0eef99eb4582dbb7037bcf89031f707070f97a8ba53e5fb7. 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: 10


Intelligence 10 IOCs YARA 3 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: a8f804c2312a502e0eef99eb4582dbb7037bcf89031f707070f97a8ba53e5fb7
SHA3-384 hash: 3ab6c2a1c81e45143d042d153b0658ce265f25dac04c3759336cd96a5926c0ed352cfb1570b4692867603494f5c7411d
SHA1 hash: 0e91f8bf64d008057b27549ffabc8ba53b76b72f
MD5 hash: 54002d33966a416406390a7336571eb8
humanhash: whiskey-east-carpet-asparagus
File name:INQUIRY No. 280720205467_pdf.exe
Download: download sample
Signature AgentTesla
Create hunting rule
File size:915'968 bytes
First seen:2020-07-28 13:13:40 UTC
Last seen:2020-07-28 14:07:23 UTC
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'742 x AgentTesla, 19'607 x Formbook, 12'242 x SnakeKeylogger)
ssdeep 24576:Ya0stNuszlc+43Ly36BKMRJB50k96MnZBIdkbTNaRso:kstNdzlL4GiJBqkNnZtTNaRso
Threatray 10'596 similar samples on MalwareBazaar
TLSH 5D158DAD321172EFC86BD472DEA81CA4EA50A57B831F4213E42315ADEE4D897CF154F2
Reporter abuse_ch
Tags:AgentTesla exe


Avatar
abuse_ch
Malspam distributing AgentTesla:

HELO: de.uitn.com
Sending IP: 148.251.248.181
From: Rodrigo Peralta <rperalta@llorente.cl>
Reply-To: Rodrigo Peralta <soomla6384@yahoo.com>
Subject: AW: AW: Inquiry
Attachment: INQUIRY No. 280720205467_pdf.rar (contains "INQUIRY No. 280720205467_pdf.exe")

AgentTesla SMTP exfil server:
mail.specialmetal.ir:587

Intelligence

File Origin
# of uploads :
2
# of downloads :
78
Origin country :
n/a
Vendor Threat Intelligence
Detection:
AgentTeslaV2
Create hunting rule
Link:
https://www.capesandbox.com/analysis/33656/
Detection(s):
SecuriteInfo.com.CIL.HeapOverride.Heur.8988.UNOFFICIAL
Create hunting rule

Result
Verdict:
Malware
Maliciousness:

Behaviour
Creating a window
Creating a file in the %AppData% directory
Enabling the 'hidden' option for recently created files
Creating a file in the %temp% directory
Launching a process
Creating a process with a hidden window
Deleting a recently created file
Result
Threat name:
AgentTesla
Create hunting rule
Detection:
malicious
Classification:
troj.spyw.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/400337
Signature
Binary contains a suspicious time stamp
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)
Initial sample is a PE file and has a suspicious name
Injects a PE file into a foreign processes
Installs a global keyboard hook
Machine Learning detection for dropped file
Machine Learning detection for sample
Multi AV Scanner detection for dropped file
Multi AV Scanner detection for submitted file
PE file contains section with special chars
PE file has nameless sections
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
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)
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 dnsIp2 2 Behavior Graph ID: 252523 Sample: INQUIRY No. 280720205467_pdf.exe Startdate: 28/07/2020 Architecture: WINDOWS Score: 100 51 g.msn.com 2->51 53 asf-ris-prod-neurope.northeurope.cloudapp.azure.com 2->53 63 Snort IDS alert for network traffic (e.g. based on Emerging Threat rules) 2->63 65 Found malware configuration 2->65 67 Multi AV Scanner detection for dropped file 2->67 69 15 other signatures 2->69 8 vMsys.exe 5 2->8         started        11 INQUIRY No. 280720205467_pdf.exe 7 2->11         started        14 vMsys.exe 4 2->14         started        16 wuapihost.exe 2->16         started        signatures3 process4 file5 83 Multi AV Scanner detection for dropped file 8->83 85 Queries sensitive network adapter information (via WMI, Win32_NetworkAdapter, often done to detect virtual machines) 8->85 87 Machine Learning detection for dropped file 8->87 89 Queries sensitive BIOS Information (via WMI, Win32_Bios & Win32_BaseBoard, often done to detect virtual machines) 8->89 18 vMsys.exe 8->18         started        22 schtasks.exe 1 8->22         started        43 C:\Users\user\AppData\...\&startupname&.exe, PE32 11->43 dropped 45 C:\...\&startupname&.exe:Zone.Identifier, ASCII 11->45 dropped 47 C:\Users\user\AppData\Local\...\tmp4143.tmp, XML 11->47 dropped 49 C:\...\INQUIRY No. 280720205467_pdf.exe.log, ASCII 11->49 dropped 91 Injects a PE file into a foreign processes 11->91 24 INQUIRY No. 280720205467_pdf.exe 2 5 11->24         started        27 schtasks.exe 1 11->27         started        29 schtasks.exe 14->29         started        31 vMsys.exe 14->31         started        signatures6 process7 dnsIp8 55 mail.specialmetal.ir 18->55 57 192.168.2.1 unknown unknown 18->57 71 Tries to harvest and steal Putty / WinSCP information (sessions, passwords, etc) 18->71 73 Tries to steal Mail credentials (via file access) 18->73 75 Tries to harvest and steal ftp login credentials 18->75 77 Tries to harvest and steal browser information (history, passwords, etc) 18->77 33 conhost.exe 22->33         started        59 specialmetal.ir 5.144.130.34, 49728, 49741, 587 HOSTIRAN-NETWORKIR Iran (ISLAMIC Republic Of) 24->59 61 mail.specialmetal.ir 24->61 39 C:\Users\user\AppData\Roaming\...\vMsys.exe, PE32 24->39 dropped 41 C:\Users\user\...\vMsys.exe:Zone.Identifier, ASCII 24->41 dropped 79 Hides that the sample has been downloaded from the Internet (zone.identifier) 24->79 81 Installs a global keyboard hook 24->81 35 conhost.exe 27->35         started        37 conhost.exe 29->37         started        file9 signatures10 process11
Detection:
agenttesla
Create hunting rule
Link:
https://mwdb.cert.pl/sample/a8f804c2312a502e0eef99eb4582dbb7037bcf89031f707070f97a8ba53e5fb7/
Threat name:
ByteCode-MSIL.Trojan.AgentTesla
Create hunting rule
Status:
Malicious
First seen:
2020-07-28 13:15:08 UTC
AV detection:
25 of 29 (86.21%)
Threat level:
  5/5
Detection(s):
Malicious file
Link:
https://check.spamhaus.org/check/?searchterm=vd4ajqrrfjic4dxpthvulaw3w4bxxt4jampxa4dq7f5ixjj6l63q._file
Verdict:
malicious
Label(s):
agenttesla
Create hunting rule
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AgentTesla
+ 10'586 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/200728-sxshmbt27n/
Behaviour
Suspicious use of AdjustPrivilegeToken
Creates scheduled task(s)
Suspicious use of WriteProcessMemory
Suspicious behavior: EnumeratesProcesses
Suspicious use of SetWindowsHookEx
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:
Suspicious File
Score:
0.59
Link:
https://yomi.yoroi.company/submissions/a8f804c2312a502e0eef99eb4582dbb7037bcf89031f707070f97a8ba53e5fb7

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 694426ae6f09cfd3d70eadd9d464f6174c44d7b4651eaabddbd7a9e5685808e1

AgentTesla

Executable exe a8f804c2312a502e0eef99eb4582dbb7037bcf89031f707070f97a8ba53e5fb7

(this sample)

  
Dropped by
MD5 d2f1b6a9b3947fd2e97377ab1b88cc53
  
Delivery method
Distributed via e-mail attachment
Cape
Cape
https://www.capesandbox.com/analysis/33656/
  
Dropped by
SHA256 694426ae6f09cfd3d70eadd9d464f6174c44d7b4651eaabddbd7a9e5685808e1

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