MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 a91926c898c91c02d44556c60d2ed4289fcdde2e2a03c0fdcc003678aa5d767c. 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: a91926c898c91c02d44556c60d2ed4289fcdde2e2a03c0fdcc003678aa5d767c
SHA3-384 hash: 6a2ac7da079ad112d9ab311e431a6df0e575e4599f988d74b2dacaac67a55a537775cd7123d93d33c72608434323775c
SHA1 hash: 97a1a121c39ec1ada781009162df4efc3a687824
MD5 hash: 8f6101c28a8845caca0a13c937190895
humanhash: bakerloo-thirteen-queen-magazine
File name:zskio49Y2nji70N.exe
Download: download sample
Signature AgentTesla
Create hunting rule
File size:555'520 bytes
First seen:2020-08-17 06:32:57 UTC
Last seen:2020-08-17 08:27:59 UTC
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'650 x AgentTesla, 19'462 x Formbook, 12'203 x SnakeKeylogger)
ssdeep 12288:go4EcmZHAFaxmVmie9bngPq7wHHXxSd30LJGrIum9yPjQ65SIg8:P4EcmZHAFaxmVmie9bngPqUHHE0LrumX
Threatray 9'708 similar samples on MalwareBazaar
TLSH CBC4AC5A38D0E3DED5E54FB948149C1663FE2F1A0606AA0FDD2B39D367E9BC1BD20442
Reporter abuse_ch
Tags:AgentTesla exe


Avatar
abuse_ch
Malspam distributing AgentTesla:

HELO: gmail.com
Sending IP: 209.58.149.66
From: Nguyen Mien Nam <rooneyleo1@gmail.com>
Subject: Product Inquiry
Attachment: COMPANY CATALOGUE.ARJ (contains "zskio49Y2nji70N.exe")

Intelligence

File Origin
# of uploads :
2
# of downloads :
74
Origin country :
n/a
Vendor Threat Intelligence
Detection:
AgentTeslaV2
Create hunting rule
Link:
https://www.capesandbox.com/analysis/46686/
Detection(s):
SecuriteInfo.com.Artemis8F6101C28A88.13428.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/432629
Signature
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
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: 268592 Sample: zskio49Y2nji70N.exe Startdate: 17/08/2020 Architecture: WINDOWS Score: 100 47 Found malware configuration 2->47 49 Yara detected AgentTesla 2->49 51 Yara detected AntiVM_3 2->51 53 2 other signatures 2->53 6 zskio49Y2nji70N.exe 3 2->6         started        10 qbeRb.exe 3 2->10         started        12 qbeRb.exe 2 2->12         started        process3 file4 25 C:\Users\user\...\zskio49Y2nji70N.exe.log, ASCII 6->25 dropped 55 Queries sensitive network adapter information (via WMI, Win32_NetworkAdapter, often done to detect virtual machines) 6->55 57 Queries sensitive BIOS Information (via WMI, Win32_Bios & Win32_BaseBoard, often done to detect virtual machines) 6->57 59 Injects a PE file into a foreign processes 6->59 14 zskio49Y2nji70N.exe 2 5 6->14         started        19 zskio49Y2nji70N.exe 6->19         started        61 Machine Learning detection for dropped file 10->61 21 qbeRb.exe 2 10->21         started        23 qbeRb.exe 2 12->23         started        signatures5 process6 dnsIp7 31 mail.sardaplywood.com 72.52.178.59, 49754, 49767, 587 LIQUIDWEBUS United States 14->31 27 C:\Users\user\AppData\Roaming\...\qbeRb.exe, PE32 14->27 dropped 29 C:\Users\user\...\qbeRb.exe:Zone.Identifier, ASCII 14->29 dropped 33 Tries to harvest and steal Putty / WinSCP information (sessions, passwords, etc) 14->33 35 Moves itself to temp directory 14->35 37 Tries to steal Mail credentials (via file access) 14->37 39 Installs a global keyboard hook 14->39 41 Tries to harvest and steal ftp login credentials 21->41 43 Tries to harvest and steal browser information (history, passwords, etc) 21->43 45 Hides that the sample has been downloaded from the Internet (zone.identifier) 21->45 file8 signatures9
Detection:
agenttesla
Create hunting rule
Link:
https://mwdb.cert.pl/sample/a91926c898c91c02d44556c60d2ed4289fcdde2e2a03c0fdcc003678aa5d767c/
Threat name:
ByteCode-MSIL.Trojan.AgentTesla
Create hunting rule
Status:
Malicious
First seen:
2020-08-17 03:09:54 UTC
AV detection:
23 of 28 (82.14%)
Threat level:
  5/5
Detection(s):
Malicious file
Link:
https://check.spamhaus.org/check/?searchterm=vemsnseyzeoafvcfk3da2lwufcp43xrofib4b7omaa3hrks5oz6a._file
Verdict:
malicious
Label(s):
agenttesla
Create hunting rule
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ccac5881ca9beeead13f5c7f05b289e9d3013a9eea7ce8a087dcb0aade9a60e2
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cfefe5d485164b99beeb1aea8faca9e61f8a53d4b742ebf733922a0896511b50
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d4c99e39e4f246d8b247b499083c54273da9ebaea3a41d2d16610250e4463f1f
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dcbfc03cfe9523c25ab335f599cebcbbe8f2439ef7ab973aa9ec0330e4e7d11f
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f437432942ec928304c96d45146a6cdcda572b79821fbd3d110cf6dc4b394d05
AgentTesla
+ 9'698 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/200817-nbervekdne/
Behaviour
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: RenamesItself
Suspicious use of AdjustPrivilegeToken
Suspicious use of SetWindowsHookEx
Suspicious use of WriteProcessMemory
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 Payload
AgentTesla
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Suspicious File
Score:
0.61
Link:
https://yomi.yoroi.company/submissions/a91926c898c91c02d44556c60d2ed4289fcdde2e2a03c0fdcc003678aa5d767c

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

arj ad6c95f37ae5d71114bf593d71ce396f3f9101f7be90bc0c1013ecf94e36f174

AgentTesla

Executable exe a91926c898c91c02d44556c60d2ed4289fcdde2e2a03c0fdcc003678aa5d767c

(this sample)

  
Dropped by
MD5 2cd86806b90d4cf0ba299164d34d52e8
  
Delivery method
Distributed via e-mail attachment
Cape
Cape
https://www.capesandbox.com/analysis/46686/
  
Dropped by
SHA256 ad6c95f37ae5d71114bf593d71ce396f3f9101f7be90bc0c1013ecf94e36f174

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